primary crusher for gold

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In order to accommodate the data dump of all recipes in the game on 2018/03/08, please assume that any recipe that doesn't have an attached recipe card image is, as yet, untested. If you have successfully obtained a recipe card from any recipe that doesn't yet have an image, please post that recipe card image to the wiki. Thank you.

There are 39 Blank Shard recipes listed in the 2018 03 08 recipe datamine. If images of the individual recipes are provided, they will be added then. The as yet 12 unlisted recipes all fall into the below pattern of 5 (hero) shards + 1 Soul Cleaner, at a rate of 75% up to 99%, should appear below Almmaharret on the in-game recipe list, and be worth 5 Blank Shards.

home |victoria gold corp

Victoria Gold Corp's Eagle Gold Mine poured its first gold in Q3, 2019 and achieved commercial production on July 1, 2020. In full production, the mine will produce 210,000 ounces of Au per year. The Reserve is 3.3 million ounces of gold and the mine life is +11 years. The deposit is open at depth and along strike. Exploration potential of the greater Dublin Gulch property is good and includes priority targets Olive-Shamrock, Bluto and Nugget-Raven.

gold processing,extraction,smelting plant design, equipment for sale | prominer (shanghai) mining technology co.,ltd

Prominer maintains a team of senior gold processing engineers with expertise and global experience. These gold professionals are specifically in gold processing through various beneficiation technologies, for gold ore of different characteristics, such as flotation, cyanide leaching, gravity separation, etc., to achieve the processing plant of optimal and cost-efficient process designs.

Based on abundant experiences on gold mining project, Prominer helps clients to get higher yield & recovery rate with lower running cost and pays more attention on environmental protection. Prominer supplies customized solution for different types of gold ore. General processing technologies for gold ore are summarized as below:

For alluvial gold, also called sand gold, gravel gold, placer gold or river gold, gravity separation is suitable. This type of gold contains mainly free gold blended with the sand. Under this circumstance, the technology is to wash away the mud and sieve out the big size stone first with the trommel screen, and then using centrifugal concentrator, shaking table as well as gold carpet to separate the free gold from the stone sands.

CIL is mainly for processing the oxide type gold ore if the recovery rate is not high or much gold is still left by using otation and/ or gravity circuits. Slurry, containing uncovered gold from primary circuits, is pumped directly to the thickener to adjust the slurry density. Then it is pumped to leaching plant and dissolved in aerated sodium cyanide solution. The solubilized gold is simultaneously adsorbed directly into coarse granules of activated carbon, and it is called Carbon-In-Leaching process (CIL).

Heap leaching is always the first choice to process low grade ore easy to leaching. Based on the leaching test, the gold ore will be crushed to the determined particle size and then sent to the dump area. If the content of clay and solid is high, to improve the leaching efficiency, the agglomeration shall be considered. By using the cement, lime and cyanide solution, the small particles would be stuck to big lumps. It makes the cyanide solution much easier penetrating and heap more stable. After sufficient leaching, the pregnant solution will be pumped to the carbon adsorption column for catching the free gold. The barren liquid will be pumped to the cyanide solution pond for recycle usage.

The loaded carbon is treated at high temperature to elute the adsorbed gold into the solution once again. The gold-rich eluate is fed into an electrowinning circuit where gold and other metals are plated onto cathodes of steel wool. The loaded steel wool is pretreated by calcination before mixing with uxes and melting. Finally, the melt is poured into a cascade of molds where gold is separated from the slag to gold bullion.

Prominer has been devoted to mineral processing industry for decades and specializes in mineral upgrading and deep processing. With expertise in the fields of mineral project development, mining, test study, engineering, technological processing.

gold crushing machine

Gold milling begins when ore material from the mine is reduced in particle size by crushing and grinding. Crushing is crucial stage in gold benefication process. According to end products requirements, gold crushing is generally processed in three steps: primary crushing, secondary crushing and tertiary crushing.

A primary crusher, such as a jaw crusher, is used to reduce ore into particles less than 150 mm in diameter. Impact crusher and cone crusher are often used in secondary and tertiary crushing process. Generally, crushing continues using a cone crusher and a vibrating screen until the ore is less than 19 mm. Crushing in jaw and cone crushers is a dry process, with water spray applied only to control dust.

Gold crushing is the first stage in the comminution process. This is usually a dry operation, which involves breaking down the ore by compressing it against rigid surfaces or by impacting it against hard surfaces in a controlled motion flow.

Crushing process step prepares the gold ore for further grinding or for feeding directly to the classification or concentration separation stages. We provide high quality gold crusher equipment. The popular gold crusher machine includes the following types:

primary crushing

The term primary crusher, by definition, might embrace any type and size of crushing machine. The term implies that at least two stages of crushing are involved, but in many cases the machine which performs the function of initial crusher is the only crusher in the plant. The factors influencing the selection of a crusher for this service are much the same, regardless of how many crushing stages there are in the flowsheet; therefore, the term primary crusher, by common usage, is applied to the crusher which takes up the job of reduction where the blasting operations leave off. Selecting the right type and size of primary crusher is a problem of prime importance in the designing of a crushing plant of any nature and size. Usually this machine is the largest and most expensive single item of equipment in the plant; a mistake in the choice can only be remedied fully by replacement; and, because the entire primary crusher-house arrangement is generally tailored.to fit the crusher, such .replacement is almost always a costly procedure. While personal favouritism toward some particular type of crusher may safely be allowed to swing a close decision, it should never blind the engineer or operator to the merits of other types, nor to the limitations of his favorite. The following factors all have a more or less important bearing upon the choice of the primary crusher.

The first three of these factors will almost always be ascertainable at least to a close approximation before the matter of crusher choice is taken up. Sometimes, as when a new crushing plant, or a new primary crusher set-up, is to be installed at an existing operation the last three factors will be pre-established. Otherwise, it is sound practice to consider them as a part of the problem of crusher selection. The primary crushing setup is closely linked to the quarrying or mining operation, and it is only by careful adjustment of all equipment selections to the general plan of operation that optimum operating results may be realized.

While it is convenient to discuss the influence of these several factors separately, it is well to keep in mind that they are more or less closely interlocked, and that a change in one of them may necessitate altering one or more of the others.In addition to the factors listed there are usually a few which are peculiar to each individual problem such as labor costs and so on. Any plant design problem is an economic as well as an engineering one. We are concerned here ,chiefly with the engineering phases.

Characteristics of the material to be crushed include the geological classification of the rock, its physical structure, its chemical analysis (at least so far as abrasive constituents are concerned), and at least a qualitative evaluation of its resistance to crushing that is, whether soft, medium, hard, or very hard and tough. Frequently such information may be obtained from contiguous deposits which are being operated; sometimes the values must be arrived at by laboratory tests. It is never safe to make blanket assumptions, even on such a material as limestone, which can sometimes prove to be quite tough, as well as to contain significant amounts of abrasive silica.

Physical, or geological, structure of the deposit often has an important bearing upon selection of size or type, or both. If the deposit is thinly stratified, as, for example, many deposits of limestone are, it is safe to assume that the rock can be blasted economically into a condition for feeding a gyratory crusher of medium proportions, or, if other characteristics are suitable, a sledging roll crusher, such as the Fairmount machine. If, on the other hand, the formation is of massive character, again, some limestones are, the gyratory crusher might be ruled out in favour of the jaw crusher, unless the operation is of sufficient magnitude to warrant installation of a large size of gyratory. The proposed quarrying or mining procedure will of course have some bearing upon the size of rock to go to the crusher, regardless of its physical structure, as will be pointed out in further detail later on. If the chemical analysis of the rock discloses that substantial amounts of free silica or any other abrasive are present, crushers of the sledging roll or hammermill types are usually ruled out unless the material is extremely soft and friable. There are occasional speciality applications where such machines may be indicated for crushing abrasive materials, but from the standpoint of, economical operation their use for such service is rarely justifiable. The same restriction holds true for hard and tough materials. For such rock or ore our choice of a primary crusher is restricted to the gyratory and jaw types except, again, for the occasional specialty application where economy in maintenance may be sacrificed for other considerations such as lower first cost, or space restrictions.

The significance of this factor is so obvious that it sometimes does not receive quite as much thought as it should. From the standpoint of minimum requirement, it is of course closely tied up with product size, or crusher setting. But the primary crusher can seldom be chosen solely on the basis of capacity; it should never be selected with a view to just meeting the average capacity required to feed the rest of the crushing plant. Just how much the rated capacity of the primary crusher (at the required discharge setting) should exceed the average capacity of the plant depends upon how uniformly the crusher will be fed; or to put it more definitely, what percentage of the total operating period the crusher will operate at full rated capacity. The answer to this is not always an easy one to predetermine, as it may depend upon several details of plant design and quarry operation.

In the average quarry operation, the only surge capacity between the quarry and the primary crusher consists of whatever quantity of rock may be, at the moment, loaded in cars or trucks, and usually this is not large. For that reason, any operating delays occurring in loading, transportation or primary crushing quickly affect all three of them, with the result that the feed to the balance of the crushing plant is cut-off until the trouble is rectified. If the plant as a whole is to maintain its rated average output, these departments must be capable of making up for such interruptions, and they can only do this if they have reserve capacity over and above the average requirement.

Such interruptions to continuous production are not uncommon in the primary crusher house; they may assume serious proportions if the crusher receiving opening is not large enough for the material it is expected to handle, and the largest crushers of any type will occasionally bridge or block. Crusher capacity tables are predicated upon a continuous feed of rock of a size that will readily enter the crushing chamber; it is obvious therefore that a crusher whose rating just equals the average plant requirement would have no reserve to compensate for the conditions we have outlined. For the average quarry operation this reserve should be not less than 25 percent, and preferably about 50 percent.

Since the minimum dimension of the feed opening of a crusher determines the maximum size of lump that it can take, the choice of a primary breaker is dependent as much on the size of the feed as on the hourly tonnage. Thus a 15 in. by 24 in. jaw crusher would be suitable for a small mine hoisting 300 tons in eight hours from underground workings from which lumps larger than 14 in. are not likely to be received. A crusher of these dimensions will break 40 tons per hour to 2-in. size with a power consumption of 30 h.p. On the other hand, a 14-in. gyratory crusher, working as it should at full capacity, will crush 100 tons per hour to the same size with a power consumption of 70 h.p. ; at 40 tons per hour, it would still require about 50 h.p. The jaw crusher is evidently the more economical machine in this case, and its first cost is only about half that of the gyratory crusher.

If the capacity of the primary breaker is required to be 100 tons per hour or over, a gyratory crusher is likely to be more economical than the other type, since it costs no more than a jaw crusher of similar capacity and consumes less power. Moreover, the difference in power consumption between the two types of machine is greater in practice than in theory; this is due to the fact that, since the gyratory crusher can be choke-fed, it is easier to keep it running at maximum efficiency.

The position is different when mining is done by power-shovel. The maximum size of lump delivered to the crushing plant is much larger than from underground workings, and it is not advisable to use a bin for the storage of the ore on account of the difficulty of handling very large lumps through a bin gate. Consequently the ore is generally sent direct to a preliminary breaker which reduces it to a size suitable for feeding the normal primary breaker. The first machine is often of the jaw type, although this depends on the circumstances. Suppose, to take an instance, that the shovels were equipped with 3-yd. dippers and that 2,000 tons were being mined per day. A 48 in. by 60 in. jaw crusher is more than large enough to take the maximum size of lump that could get through the jaws of the dipper, and it would break the whole days output to 6-in. size in eight hours with a power consumption of under 200 h.p. On the other hand, a 42-in. gyratory crusher, which is the smallest that could be installed with safety, has a maximum capacity of over 5,000 tons in eight hours with a power consumption of about 275 h.p. The jaw breaker would therefore be the more economical machine. It could, if necessary, be installed near the scene of mining operations, and would be set to deliver a 6- or 8-in. product, which could be conveniently transported to the crushing section of the flotation plant where it would be fed through the coarse ore bin to the primary breaker in the ordinary way.

The choice of a primary breaker is an individual problem for every installation. The type of mining and the regularity, size, and rate atwhich the ore is delivered, are the main determining factors, but all local conditions should be taken into consideration before a decision is made.

primary crusher selection & design

The crusher capacities given by manufacturers are typically in tons of 2,000 lbs. and are based on crushing limestone weighing loose about 2,700 lbs. per yard3 and having a specific gravity of 2.6. Wet, sticky and extremely hard or tough feeds will tend to reduce crusher capacities.

Selectiingwhat size a crusher needs to be is based on factors such as the F80 size of the rocks to be crushed, the production rate, and the P80 desired product output size. Primary crushers with crush run-of-mine rock from blast product size to what can be carried by the discharge conveyor or fit/math the downstream process.A typical example of primary crushing is reducing top-size from 900 to 200 mm.

Ultimately, the mining sequence will certainly impact the primary crusher selection. Where you will mine ore and where from, is a deciding factor not so much for picking between a jaw or gyratory crusher but its mobility level.

The mom and dad of primary crushers are jaw and gyratory crushers. In open-pit mines where high tonnage is required, thegyratory crushers are typically the choice as jaw crushers will not crush over 500 TPH with great ease. There are exceptions like MPI Mineral Park in AZ where 50,000 TPD was processed via 2 early century vintage jaw crushers of a:

The rated capacity at 5 closed-side setting was 490 stph based on standard 100lbs/ft3 feed material. These crushers were fed a very fine ore over a 4 grizzly which allowed the 1000 TPH the SAG mills needed.

In under-ground crushing plants where the diameter of the mine-shaft a skip forces limits on rock size, a jaw crusher will be the machine of choice. Again, if crushing on surface, both styles of stone crushing machines should be evaluated.

gold crushing - jxsc machine

What is the gold crushing process flow? how to extract gold from its ore? In the paper, I make details from the gold crushing circuit, crushing equipment, primary crusher, secondary crusher and tertiary crusher, screening. Join us.

Every gram of gold from the stones is indispensable to experience mining crushing grinding sorting smelting casting, etc., from the perspective of mineral processing, the crushing is the first mineral beneficiation process step, and it is almost a preparatory section for any gold processing plant. By crushing process, reduce the large ore to ideal particle size for grinding.

The gold crushing process design is determined by the ore amount, hardness and the crushing ratio. The most commonly used rock crushers are jaw crushers and cone crushers; in addition, vibrating screens (round vibrating screens) are required to complete the closed circuit with the crushers.

Jaw crusher is generally used as the primary crusher in the crushing circuit and connects to the ore feeding machine. In the early years, common used plate feeder, but now, the vibrating feeder is more popular. Practice has proved that the vibrating feeder has advantages of low power consumption, strong transportation capacity, low failure rate and easy maintenance, which can fully meet the needs of both of large scale gold plant ore small scale processing plant.

For medium hardness ore, the ore can be gradually crushed from the crusher mouth. For the ore with higher hardness, the material may be broken in the middle of the jaw plate, so that the opening width of the crusher mouth needs to be wider.

Each crusher has a maximum feed size, which surely is not a fixed value. For medium hardness ore, adopt extrusion type feeding mode, even if there is a small amount of large ore exceeding the maximum feed size, has no effect on the work of the crusher. On the contrary, if the material is high hardness ore, it is better to intermittently feed to avoid clogging.

In addition to the maximum feed size, an important parameter of the crusher is the discharge gap. The discharge gap is not equal to the maximum discharge size. The maximum discharge size of the jaw crusher is usually 1.5-1.8 times of the discharge gap. Each crusher has a minimum discharge clearance. In order to ensure the stability of the crushing process, 1.5-2 times the minimum clearance is selected to complete the first stage of the fracture.

The iron is fatal to the cone crusher, so the ore must be removed before enters the cone breaks. An iron remover (in fact, a magnet) can be added to the upper part of the belt conveyor to preclude the wire, nails, welding heads and the like.

For the cone crusher, it is must use the extrusion feeding method, intermittent feeding method damages the equipment very much. Therefore, professional cone crusher manufacturers will configure a small buffer tank for the cone crusher. The material from the fine crushing bin can be fed into the buffer tank through a belt feeder or a small vibrating feeder. If use a chute, you can remove the buffer and let the material accumulate directly in the chute.

Similarly, the cone crusher also has the maximum feed size. This parameter value is a mandatory parameter. Never try to exceed it. Once it is stuck due to excessive material, it is very troublesome for the cone crusher.

It should be noted that, due to the closed-circuit crushing formed by the vibrating screen, the cone crusher is not the larger the discharge gap, larger the processing capacity. Different discharge gap determine the different qualified product rates and the ore recrushing rates.

As the gap increases, the actual processing capacity of the crusher increases, the gap becomes smaller, and the speed of the crushing decreases. Both of these two conditions are harmful in production. We should find the best gap in the commissioning to make the production smoother.

As the vertebral body wears, the gap will increase accordingly. In addition, the maximum discharge size of the cone crusher will reach 2-3 times of the discharge gap, so the gap size can be judged according to the granularity of the discharge during the adjustment. Never blindly adjust without a clue.

Screen layer Generally speaking, small scale gold plant use single-layer screen, medium and large mines use double-layer screen, but the purpose of double-layer screens is not to grade three products, but to improve screening efficiency.

Material As for the choice of materials for the screen, it depends on the users usage habits. It is certain that the polyurethane (rubber) screen has a longer service life, a lower screening efficiency, and a steel-wire mesh that is more fragile, but has a higher screening efficiency and is easier to maintain.

Due to the relatively harsh environment of the crushing operation, the single shift time is less than 6 hours. Therefore, when selecting the gold crushing machine, the working time is generally determined by two shifts of 6 hours or three shifts of 5 hours.

JXSC has 35 years of experience in the gold mining industry, we produce gold mining equipment, design processing flowchart for customers, alluvial gold, rock gold, quartz gold, gold sulfide, tailings arrangement. Hot Products: jaw crusher, cone crusher, impact crusher, hammer crusher, roller crusher, vibrating feeder, vibrating screen, gravity separator, flotation machine, magnetic separator, conveyor belt.

gold crushing plant, gold ore crushing, gold ore crusher, gold primary crusher - dsmac

DSMAC provided gold ore crushing and screening equipment, due to the low investment costs, long life cycle, the high efficiency, energy saving, nearly 60 gold production enterprises in China, while exports to South Africa, Zambia, Congo, India, Indonesia, Chile, Argentina and more than 80 countries.

1. Technological Process: Busted gold ----- transported by the dump truck ----- Vibrating feeder ----- Jaw crusher (Primary crusher) ----- Spring cone crusher (Secondary crusher)----- Circular vibrating screen ----- finished product as the customer required 2. Max feeding size: 420mm, 500mm, 600mm 3. Output size: As the clients required (1- 31.5mm) 4. Application: Mining, metallurgy and mineral separation.

DSMAC has always pursued the service concept of "Create customer value, the customer is always right". As for service, clients' needs have always been our primary concern. Through standardized, differentiated and super valued service, we can reduce clients' psychological cost and use-cost, and ultimately increase clients' transition value, profitability and purchasing power. As a result, we can improve DSMAC's service brand competitiveness and lead the way of service for fellow competitors.

Service Network Presently, DSMAC has offices and branch companies in more than 10 countries and regions, and 31 offices in China. In addition to traditional after-sale service, our company offers internet sales and product trace services. We guarantee that we will offer our valued clients timely and thorough services.

Service Team Our company has 30 engineers providing professional after-sale services. They are all skilled, experienced and familiar with the working principles of various machines and equipment. We promise that we will arrive on scene within 48 hours for 1000 kilometers when we get a call from our clients and not over 72 hours for clients farther away.

blanket gold mine - caledonia mining corporation plc

The current Blanket mining area has eight ore shoots in the producing section of the mine. The majority of the mine production is sourced at present from the AR Main and AR South ore bodies with a lesser contribution from the Blanket, Eroica and Lima reefs.

Significant early production milestones were: in 1965 Falconbridge acquired the property and increased gold production to an average of approximately 45 kg per month; in 1993 Kinross took over the property and built an enlarged Carbon-in-Leach (CIL) plant with capacity of approximately 3,800 tonnes per day (tpd) to treat an old tailings dump together with the run-of-mine ore.

On April 1, 2006 a wholly-owned subsidiary of Caledonia Mining Corporation completed the purchase of the Blanket Mine from Kinross. Caledonia has allowed Blanket to make considerable capital investments in its underground, surface and township facilities. These investments culminated in the commissioning of the No 4 Shaft Expansion Project at the end of September 2010 whichincreased Blankets hoisting capacity from the No. 4 Shaft from 500 tonnes per day to 3,000 tonnes per day.

The current Blanket mining area has eight ore shoots in the producing section of the mine. The majority of the mine production is sourced at present from the AR Main and AR South ore bodies with a lesser contribution from the Blanket, Eroica and Lima reefs. AR Main and AR South are massive ore bodies up to 30 m wide and are ideally suited to the long-hole open stope mining method, while the remainder of the Blanket ore bodies are tabular and better suited to underhand stoping methods.

Following the successful commissioning of the No. 4 Shaft Expansion Project in September 2010, the underground workings have increased production to approximately 1,200tonnes of ore per day using both long-hole open stoping and underhand stoping methods. Broken ore is trammed along the 22 Level rail system by battery locomotives and the ore cars trains are self-tipped onto one of three grizzlys above the ore bins which are located between 22 Level and the 765m level crushing station. The minus 300 mm rock held in three underground storage bins, Payable ore and waste ore are held in separate storage bins and handled accordingly. Ore is gravity fed from these ore bins onto the 765m Level crushing station conveyor which discharges the ore onto a vibrating grizzly feeder which discharges the oversize into a 30 x 20 Telsmith jaw crusher.

The underground crushing station ensures that all the run-of-mine ore is reduced to minus 150 mm in size as this provides for the optimisation and greater efficiency of the automated skip loading and hoisting operations. This allows mining and hoisting activity to continue without interruption.

Blanket No. 4 Shaft has been equipped with the first automated loading system in Zimbabwe which sequentially fills the two six tonne ore skips which are hoisted from the 789m level to surface. The use of this state of the art automation reduces the risk of ore loading accidents and injuries, reduces manpower costs, minimises spillage, reduces skip loading times, increases hoisting capacity, ensures precise ore tonnage accountability, and enhances winder efficiency while lowering loading and hoisting costs.

The double compartment No. 4 Shaft is Blankets main shaft for hoisting ore to surface from the loading stations at 510m and 789m below surface, and it has a proven hoisting capacity of 110 tonnes per hour from 789m. The Jethro and Eroica Shafts and the No.5 and No.6 Winzes are used for transporting personnel and materials underground, and the No.2 and Lima Shafts are also used for hoisting ore to surface.

The entire underground and surface operations of the Blanket mine, except for the Lima Shaft, including the surface compressors and the No 4 Shaft Winder can be operated by the 10,000kVA standby diesel powered generating sets which were installed and commissioned in May 2011.

This standby generating station ensures that all mining and metallurgical operations continue notwithstanding any interruptions to the electrical power supply from the grid. The level of interruptions to Blankets power supply has diminished considerably following the agreement of an un-interrupted power a supply agreement between Blanket and ZESA. In the year to 31 December 2012, the standby generators were used for a total of 108 hours (2011, 121 hours).

The Blanket Mine is situated in the Gwanda Greenstone Belt, a typical Archaean greenstone-hosted gold deposit. The deposit is situated on the northwest limb of the Gwanda Greenstone Belt along strike from several other prominent gold deposits. Blanket is the largest producing mine in a belt which at one time had 268 operating mines.

The Gwanda Greenstone Belt extends 80 km in an east-west direction and consists predominantly of basaltic rocks (greenstones) with minor felsic and ultramafic units. The belt has been intensely sheared and intruded by granites resulting in complex deformation structures and vertically dipping strata. The shape of the gold ore bodies is controlled by these structures, resulting in their near vertical orientation.

Near vertical shear zones are developed throughout the belt and are the loci of most of the small mines that have been discovered in the area. Most of Blankets prospects are of this type. Many of these now defunct small mines were shallow, had historically high recovered gold grades and closed towards the end of the 1960s when the gold price was low and the mining and metallurgical techniques available at that time were such that the mines became un-economic. The area has a long history of gold production and remains highly prospective and must therefore be regarded as an attractive exploration area as it has never been subjected to modern exploration techniques.

Active mining at the Blanket mine takes place over a 3 km strike that includes 8 discrete ore shoots. Fig NN provides a north-south vertical projection of the various Blanket ore shoots. Mineralisation occurs in near vertical shoots aligned along an approximately north-south axis. The ore shoots vary in shape from the tabular to lensoidal quartz reefs to the massive to pipe-like disseminated sulphide reefs (DSR).

Gold mineralisation occurred as a result of the reaction between rising hot fluids and the iron rich minerals in the shear zones. The reaction involved the formation of sulphide minerals, predominantly arsenopyrite, as the sulphur in solution reacted with iron in the rocks. Gold, which was also transported by the fluids, became attached to the arsenopyrite to form the gold ore. These reaction zones are located within the more ductile tensional high strain areas of the shear zone.

Blanket Mine is part of the group of mines that make up the North Western Mining Camp otherwise also called the Sabiwa group of mines. What is today referred to as Blanket Mine is a cluster of mines extending from Jethro in the south, through Blanket itself, Feudal, AR South, AR Main, Sheet, Eroica and Lima in the north. These ore shoots occur in the Blanket shear zone, a low angle transgressive shear characterised by the presence of biotite relative to the massive amphibolites forming the country rocks.

A regional sub horizontal dolerite sill intruded the above sequence and is emplaced about 500 meters below surface. The sill does not cause a significant displacement and although it truncates all the ore shoots, the mineralised shoots continue undisturbed below the sill.

Since the rock units of the Gwanda Greenstone Belt are tilted on their side and strike north-south in the vicinity of Blanket Mine, the stratigraphic sequence is exposed from the oldest in the east to the youngest in the west. The Felsic unit consisting of quartzite and sericite-quartz schists forms the base of the stratigraphy. No gold deposits have been recorded in this unit. Overlying this unit to the west is the Ultramafic-Mafic unit interlayered with banded iron formations. Gold occurs in this unit at Vubachikwe mine, which is adjacent to Blanket, where the deposits are confined to steeply dipping folds in the banded iron formation layers. The Ultramafic-Mafic unit is in turn overlain to the west by the Mafic unit, a thick sequence of tholeiitic and pillow basalts. Within the Mafic unit a prominent shear zone up to 50 meterswide runs the length of the property and is the locus of all ore bodies on the Blanket property. The sequence is completed by an Andesitic unit which caps the stratigraphic sequence.

The first type is the disseminated sulphide replacement type which comprises the bulk of the ore shoots. Typically these zones have a silicified core with fine sprays of disseminated arsenopyrite hosting the best grades. Disseminated sulphide replacement ore bodies range up to 50m in width with a strike between 60m and 90m. Free-milling gold constitutes up to 50% of the total metal content with the remainder occluded within the arsenopyrite.

Quartz-filled shear zones form the second type of mineralisation. Two quartz shears are mined at Blanket Mine, the Blanket Quartz Reef and the Eroica Reef. These reefs tend to have long strikes but are not uniformly mineralized although continuous pay shoots of over 100 m on strike are not uncommon. The Quartz Reef at Blanket has a surface strike of some 500 m, but economic mineralisation is restricted to three 90 m shoots which were defined on surface by the early workers. Grade fluctuations are more extreme in the quartz reefs than in the disseminated type reefs but on average these shears have higher grades and are used as a sweetener of ore to the mill.

Caledonias Board and Management have completed a review of alternative expansion and diversification plans for Caledonia. Both the Board and Management have also addressed the revised production projections for the Blanket Mine and the possible benefits of diversifying Caledonias production base. Caledonia has concluded the best returns on investment remain at the Blanket Mine in Zimbabwe, which continues to be cash generative in the current adverse market conditions and also offers significant investment returns that exceed alternative investment opportunities.

The objectives of the Revised Plan are to improve the underground infrastructure and logistics and allow an efficient and sustainable production build-up. The infrastructure improvements will include the continuation of the No. 6 Winze, the development of a Tramming Loop and the sinking of a new 6-meter diameter Central Shaft from surface to 1,080 meters.

The increased investment pursuant to the Revised Plan is expected to give rise to production from inferred resources of approximately 70-75,000 ounces in 2021, this being in addition to projected production in 2021 from proven and probable mineral reserves of approximately 6,000 ounces. The Revised Plan is also expected to improve Blankets long term operational efficiency, flexibility and sustainability.

The skips automatically tip ore hoisted to surface into the Shaft Bins on the No4 Shaft headgear. Ore is gravity fed from the Shaft Bins onto the No1 belt which conveys the ore over the automated belt scale and to vibrating screens and 1424 Telsmith jaw crushers. This crushing circuit reduces the ore to minus 50 mm and it is then deposited by the No 2 belt stockpile conveyor onto the coarse ore stockpile which has a live capacity of approximately 2,000 tonnes of material. Ore from the coarse ore stockpile is then fed onto the triple-deck vibrating screen with the oversize being crushed to minus 12 mm by one of two 38H Telsmith Gyrasphere crushers. The 12mm ore is then fed into the 600 tonne Mill Bin which feeds the two (of the three installed) 1.8 x 3.6 m rod mills where it is milled down to approximately 70% passing 75 microns, before being passed through two 30 inch continuous Knelson Concentrators where approximately 49% of total gold production is recovered. The Knelson Concentrator tails are pumped through cyclones and into a 3.66 x 4.9 m x 750kW (1,000 HP) regrind ball mill. As part of the No.4 Shaft Expansion Project, the capacity of the secondary crushers was increased to over 2,000 tpd and the capacity of the rod mills was increased to 1,800 tpd. The slurry from the regrind mill is pumped into a carbon in leach (CIL) plant consisting of eight, 600 cubic meter leach tanks equipped with 45 kW agitators where leaching at 50% solids and simultaneous adsorption of dissolved gold onto activated carbon takes place. The CIL plant has a nameplate capacity of 3,800 tonnes of milled ore per day. Elution of the gold from the loaded carbon and electro winning is done on site. Gold is deposited onto steel wool cathodes, the loaded cathodes are acid-digested and the resultant gold solids are smelted in an induction furnace to produce gold bullion of approximately 90% purity, after which the bullion is sold as required by Zimbabwean law to Fidelity Printers and Refiners (Fidelity) in Harare which undertakes final refining and sale. The proceeds of sale (i.e. 98.5% of the value of the gold contained before payment of any royalty) are paid directly into Blankets foreign currency account with its commercial bank in Zimbabwe within 7 days of receipt of the gold by Fidelity.

Overall gold recovery rates have been increased from 85% at the time of acquisition by Caledonia to over 94% as a result of the re-design of more efficient CIL agitators and the installation of an automated liquid sodium cyanide facility which allows for multiple stage cyanide dosing and monitoring of the CIL. The PSA (Pressure Swing Adsorption) Oxygen Generator has been re-commissioned and the controlled sparging of oxygen into the CIL has resulted in an increase in leach recoveries to approximately 94%.

No. 1 Conveyor feeding the two Primary Jaw Crushers. Tailings from the CIL circuit contain less than 30 ppm of cyanide, and are pumped to one of two tailings dams which are operated and maintained by Fraser Alexander, and are inspected and monitored daily by Blanket.

Historical operating statistics for the Blanket Mine are available in Caledonias MD&A, which can be found in the Investor section of Caledonias website. Blankets historic financial performance up to February 2009 was accounted for in Zimbabwean dollars until 2009. Due to the extreme hyper-inflationary environment which prevailed in Zimbabwe until early 2009 and the resultant devaluation of the Zimbabwean dollar, Blankets stated historic financial statements are unhelpful for the purposes of evaluating Blankets historic financial performance. The Zimbabwean dollar was abolished in February 2009 and all financial transactions in Zimbabwe now take place using other currencies, including the US Dollar, the South African Rand and the Botswana Pula. With effect from 1 January 2009, Blanket has prepared its accounts in US Dollars.

The proposed Central Shaft will be a 3,000 tonne per day, 6-meter diameter, 4-compartment shaft that will transport men, equipment and material from surface to 1,080 meters below surface. The shaft will be located between the AR Main and AR South ore bodies, in the middle of Blankets mining area. Construction on the shaft is expected to commence in July 2015, following completion of the Tramming Loop. The capital cost of the Central Shaft is expected to be approximately US$23 million. The shaft will be sunk in two simultaneous phases: from surface from 750m below surface and is expected to be completed in July 2017. Once complete, the Central Shaft will provide access for horizontal development in two directions on two levels below 750m.

The increased investment pursuant to the Revised Plan is expected to give rise to production from inferred resources of approximately 70-75,000 ounces in 2021, this being in addition to projected production in 2021 from proven and probable mineral reserves of approximately 6,000 ounces. The Revised Plan is also expected to improve Blankets long term operational efficiency, flexibility and sustainability.

The Revised Plan includes a revised life of mine plan for the Blanket Mine (the LOM Plan) in terms of which it is anticipated that the approximate production from existing proven and probable mineral reserves above 750 m level will be as set out below.

Central Shaft and the associated capacity improvements in the Blanket Processing Plant are expected to enable an increase in gold production at Blanket to 75,000 ounces by 2021 and 80,000 ounces from 2022 onwards. Improved access to Inferred Mineral Resources at depth is expected to enable the maintenance of this 80,000 ounce per year production rate until approximately 2034.

The new Central Shaft and the deepening of No 6 winze will provide access to the current inferred mineral resources below 750 meters and allow for further exploration, development and mining in these sections along the known Blanket strike, which is approximately 3 kilometers in length. The PEA has been prepared in respect of the inferred mineral resources below 750 meters. Based on the PEA, additional approximate production from current inferred mineral resources (excluding the projected production set out above) may be achieved in the following indicative ranges:

The PEA is preliminary in nature and includes inferred mineral resources that are considered too speculative geologically to have economic considerations applied to them that would enable them to be categorized as mineral reserves. There is no certainty that the PEA will be realised. Diamond drilling and development will continue with the objective of increasing confidence in order to upgrade the categorization of the resources.

The LOM Plan and the PEA have been reviewed by Minxcon Consulting, an independent mining consulting company. A technical report prepared in compliance with National Instrument 43-101 which summarizes the revised LOM Plan and the PEA will be filed on SEDAR before December 17, 2014. The most important assumptions on which the PEA is based include, a gold price of US$1,200 per ounce, achievement of the targeted production set out above and the accuracy of the projected capital costs.

It is also intended to continue exploration at two of Blankets satellite projects, Mascot and GG. No production forecasts are attributed to mining activity at either GG or Mascot at this stage as neither of these currently have defined NI43-101 mineral reserves or resources.

gold in quartz - february 2016 (vol. 85, no. 06) - icmj's prospecting and mining journal

Much of the ground where Ms. Hollingshead found her diamond is made of unweathered volcanic rock. Whenit rains, flowing runoff often leaves loose gravel, andsometimes diamonds, on the surface in these areas.

Pumps can be set up quite a distance away horizontally from the sluice, evenhundreds of feet. It will work so long as there is sufficient water at the source where the pump is located. Vertical distance is more of a problem than horizontal distance; 30 to 40 feet is the maximum vertical climb for most pumps.

Filing claims is actually quite easy, though there are a number of pitfalls that you should watch out for. Over the years, I have made just about every mistake you can with a mining claim, and have learned a few things to watch out for along the way.

There are many smaller old hard rock mines out theremore than you might think. There are some small hard rock properties that are even open to be claimed if one does the right amount of research to find them.

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trophy - yppedia

Trophies are special rewards given to pirates for exceptional achievements. They can be displayed on pirate info pages and in a gallery, similar to portrait galleries. An example of when a trophy might be awarded is when a pirate achieves an ocean wide ultimate standing in a particular puzzle or scores an incredible in a duty report. Trophies are permanent, so they cannot be traded between pirates or taken away when the circumstances with which they were awarded change (e.g. if a pirate later loses their ultimate standing). However, trophies awarded due to bugs in the game have sometimes been revoked. To view a pirate's trophies in a web browser, visit the URL http://OCEAN.puzzlepirates.com/yoweb/trophy/?pirate=PIRATENAME, where OCEAN is replaced with the ocean name, and PIRATENAME is replaced with the name of the pirate on that ocean.

The actual criteria listed below for most of the trophies are conjectured, and have not been (nor will be) confirmed by a developer. They should therefore be treated as unreliable until more specific information is discovered through player observations. Only trophies that have been observed on actual, in-game pirate information pages are listed below.

Unless otherwise indicated, the pirate can only meet the requirements through actions taken after release 2006-10-17. Most trophies count back to that release, and when new trophies are added people who have already met the requirements are usually given the trophy the next time they log on. The few trophies this is not the case for are marked as such and include a link to the release counting for that trophy began on.

Trophies that are earned are never removed except if they are triggered by a bug. Thus, if a player earned the Ultimate Crafter trophy before the existence of Blacksmithing, they will keep the Ultimate Crafter trophy. Pirates who did not have the Ultimate Crafter trophy before Blacksmithing was added to the game must now earn the Ultimate Blacksmithing trophy in order to earn Ultimate Crafter.

A player who has been awarded a trophy may be informed in two ways: Firstly, the player receives the notification "Ye have been awarded the " in the chat window. Secondly, as of release 2014-03-31, newly awarded trophies appear in the ahoy panel under the heading "Ye Received a Trophy!" along with a depiction of that trophy.

The following trophies are awarded for influencing blockade buoys by ships boarded by the pirate. Each buoy influenced counts, so the pirate may receive credit for multiple buoys in a single turn. The pirate need not be on a duty station to receive the trophy. Contested buoys also count towards the trophy.

These trophies are awarded for earning a certain number of maneuver tokens in a blockade, flotilla, or Sea Monster Hunt, while obtaining the specified rating in the duty report for that puzzle. Each level shows a trophy for a higher number of tokens. For example, the Towers of Water can only be earned after the Pillars of Bilge has been earned.

The following trophies are awarded for traveling a specified number of league points. Only those trips taken since release 2013-08-21 count towards these trophies, and leagues traveled on a navy ship do not count.

The following trophies are awarded for defeating the specified number of ships of that type while on a pillage. All pirates on a ship earn a point towards a trophy when a ship is defeated. Ships defeated with the "battle brigands with the navy" mission and PvP battles do not count. Only victories since release 2011-02-22 count towards these trophies.

Note: The Oyster trophy was previously named "Visited Old Man from Oyster Island" until release 2009-05-27. 1 Occasionally server problems prevent a portrait from being completed. If the server is able to complete the portrait later, it sometimes (or maybe always) won't count towards the yeti trophies.

The following trophies are awarded for winning citadels in Atlantis. Surviving the fray is not required. Only citadel wins after release 2008-06-03 are counted, and some wins before 2008-09-03 were not counted due to a bug.

These trophies were released in December 2008 to celebrate Puzzle Pirates' fifth birthday. They are awarded to pirates based on the creation date of that particular pirate, not the age of the account associated with the pirate. Note: Pirates created earlier than 2006 may have an inaccurate creation date recorded by the server.[1]

The following trophies are awarded for winning 15 challenge missions in the specified puzzle. The "Play with Swords!" mission may be used to count towards the Fencer trophy, but only once. Note that the challenge missions only go up to level ten -- to obtain the trophies, a pirate must defeat the level-ten mission multiple times.

The following trophies are awarded for foraging the specified number of gold nuggets. In release 2008-08-27, gold ore was changed to gold nuggets, one gold ore being equal to ten gold nuggets. The trophy requirements were also increased to require ten times as many nuggets as the ore requirement was. The First Gold trophy was later changed back to needing only one nugget.

The following trophies are awarded for making large contributions to the game. Unlike other trophies, these trophies are not automatically triggered. Instead, an Ocean Master adds it to the pirate's trophy page manually.

Pirates participated by defeating individual barbarians and brigands aboard ships while pillaging. In addition, the following trophies were awarded to individual pirates to commemmorate the number of individuals defeated. Skellies, zombies, opponents in Sea Monster Hunts and swabbies did not count toward the totals. All opponents defeated in a battle counted, and it was not necessary either for the pirate to survive the melee or for the ship to win the battle.

Pirates participated by defeating brigands and barbarians while pillaging. Winning battles awarded toy parts to pirates, who could then earn extra points for their team by assembling them into toys. Pirates would also win the following trophies for assembling toys. Save for the three first-toy trophies, it does not matter which types of toy are assembled.

Pirates participated by defeating brigands and barbarians while pillaging. In addition to the trophies listed above, the following trophies were awarded to individual pirates based on the total amount of pieces of eight won by the whole ship.

Pirates participated by defeating brigands and barbarians while pillaging. Winning battles awarded supplies to pirates, who could then earn extra points for their team by assembling them into supply kits. Pirates would also win the following trophies for assembling supply kits. Save for the three first-kit trophies, it does not matter which types of kit are assembled.

Pirates participated by defeating brigands and barbarians while pillaging. Winning battles awarded toy parts to pirates, who could then assemble[2] them into toys. Pirates would also win the following trophies for assembling toys.

Pirates participated by defeating brigands and barbarians while pillaging. Winning battles awarded toy parts to pirates, who could then assemble them into toys. Pirates would also win the following trophies for assembling toys. Save for the three first-toy trophies, it does not matter which types of toy are assembled.

Pirates participated by defeating brigands and barbarians while pillaging, or by defeating Imperial outposts. Winning battles awarded artefact pieces to pirates, who could then assemble them into artefacts. Pirates would also win the following trophies for assembling artefacts. Save for the three first-artefact trophies, it does not matter which types of artefact are assembled.

Pirates participated by defeating brigands and barbarians while pillaging. Winning battles awarded toy parts to pirates, who could then assemble them into toys. Pirates would also win the following trophies for assembling toys. Save for the three first-toy trophies, it does not matter which types of toy are assembled.

Pirates participated by defeating individual barbarians and brigands aboard ships while pillaging. In addition, the following trophies were awarded to individual pirates to commemmorate the number of individuals defeated. Skellies, zombies, opponents in Sea Monster Hunts and swabbies did not count toward the totals. All opponents defeated in a battle counted, and it was not necessary either for the pirate to survive the melee or for the ship to win the battle.

Pirates participated by defeating brigands and barbarians while pillaging, or by defeating Imperial outposts. Winning battles awarded artefact pieces to pirates, who could then assemble them into artefacts. Pirates would also win the following trophies for assembling artefacts. Save for the three first-artefact trophies, it does not matter which types of artefact are assembled.

Pirates on all oceans are randomly placed into one of several werewolf packs (or teams) for the duration of the competition. Pirates earned points for their pack for every roving band of island-dwelling werewolves defeated in a rumble fray.

Pirates participated by defeating brigands and barbarians while pillaging. Winning battles have a chance to receive special toy part trinkets as prizes, which can then be assembled into toys furniture. Pirates would also win the following trophies for assembling toys.

The Seals o' Piracy are a trophy series that were introduced in August 2009. Each trophy has a specific task needed to win the trophy, which is announced by the Ocean Masters at (or close to) the start of the month. Full details on the trophy triggers may be seen on the official seals article above -- this included some small differences for triggers on the Crimson Ocean before it closed. All seal triggers are counted from the first day of the month in which it is awarded.

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pe series jaw crusher for primary crushing | hxjq

There are many particle size reduction devices including jaw crushers, impact crushers, cone crushers, and hammer crushers, among which jaw crusher, as the longest and most popular crushing equipment, has been widely used in the primary crushing of materials.

Jaw crusher is the traditional crushing equipment with many models and large output. PE jaw crusher is mainly used for primary crushing of various ores and undisturbed materials, also used for both coarse and fine crushing.

There are many models of PE jaw crushers, among which the most popular models arePE-7501060, PE-600900, PE-150250, etc. In order to meet the strict requirements of customers, the crusher has been extended to the PEX jaw crusher under the constant innovation of engineers, which is also known as the fine crusher.

This crusher has been widely used in mining, building materials, roads, railways, water conservancy, and chemical industries, as well as crushing various soft and hard ores with a compressive strength of 350MPa and a diameter of 500-1800 mm, such as river pebble, granite, basalt and other metal ores. The PE jaw crusher has a significant crushing efficiency with a large crushing ratio and a high output, which is favored by the majority of users.

This crusher is used in almost all minerals and mining industries. Whether dealing with metal ore or non-metallic ore, we can offer you a solution that reduces the size, for a series of our products are available for crushing, downsizing, beneficiation with reliable design and versatility for your application. PE jaw crusher can process 1-2,000 tons of ore per hour, so in Africa, many gold mines choose our Jaw Crusher as the primary crushing of their entire beneficiation line.

In September last year, Mr. Brighton from Zimbabwe found us and consulted us about the mineral processing equipment that he needed equipment that could process 10 tons of gold ore per hour whose feed size was 200 mm and discharge size was 7-30 mm.

According to the project information he provided, our technical manager designed a complete production line for him, including jaw crusher, cone crusher, ball mill, spiral classifier, flotation machine, and dryer. In this situation, a jaw crusher must be used for primary crushing in order to achieve the required discharge size, granularity, and higher quality end product.

As a result, the technical manager proposed a PE-250400 jaw crusher for Mr. Brighton to meet his requirements for incoming and outgoing materials. This type of jaw crusher can reduce 5-21 tons of ore per hour which is suitable for his requirements now, even the future when he wants to expand the production. Compared with raw gold ore, the gold ore processed by the mineral processing equipment is more expensive and more versatile in the world, and also more attractive to the customers for higher profits it brings.

Many infrastructure industries have a solid foundation, which is a variety of rock aggregates. Recognizing that the widespread use of these aggregates has prompted us to continuously create and improve our rock crushing equipment to help boost your production, reduce maintenance times and increase overall operational efficiency.

Aggregates that are crushed from large stones are essential raw materials in construction, transportation, and other infrastructure construction. Therefore, the role of crushing equipment in the aggregate crushing production line is critical.

Our PE jaw crusher is commonly used throughout the industry to reduce the pieces into the required sizes and to impart fineness to the broken material with high quality and efficiency. It can make rocks, sandstones, river pebbles, and other materials into various granularity that meet the requirements of construction sand with high compressive strength, being more in line with building requirements, and characteristic of improving building quality.

In June 2018, a construction company from Ethiopia found our promoters, because they were about to carry out the road construction project and hoped to crush the basalt raw materials (250 mm to 500 mm) into the sizes of 00, 01, 02, 03 (00 stands For fine below 4 mm the dust; 01 between 4 mm to 8 mm; 02 stands for 20 mm; 03 stands for 20 mm to 32 mm.), and due to the large amount of work, it is necessary to crush 200 tons of basalt per hour.

Based on customer's information, we had customized basalt crushing solutions for customers, including jaw crusher, cone crusher, sand washer and circular vibrating screen, among which, the PE-7501060 jaw crusher model can meet all the requirements of customers, which means that the crushed basalt had a uniform particle size and was very suitable for road construction.

PE jaw crusher is widely used in coal mine operations and attractive to customers because of its uniform end granularity, lower noise, less dust, and less pollution. Under strict environmental regulations, a good deal of coal mine projects has been suspended due to large pollution, which has seriously hindered the development of mining plants, resulting in low efficiency in major mining areas.

However, we have actively responded to the call for environmental protection by using advanced technologies and new materials to manufacture this crusher to meet national environmental standards. Coupled with PE's superior discharge size and simple operation characteristics, our company has been chosen by many users.

The rapid development of society has led to the production of many construction wastes. The original construction waste is not treated, not only occupies the land, but also causes pollution of rivers. The application of the crusher not only solves environmental pollution but also brings a high economic benefit for investors by recycling the construction waste into valuable materials.

The brand is shaped by innovation. This new generation of jaw crushers has redefined itself with advanced technical design, which can improve material flow and production in quarrying, mining, demolition and recycling applications, and for which this machine has become a deal solution for large manufacturers and crushing operators.

This crusher adopts the most advanced crushing technology and digital component processing equipment to make the internal structure precise, thus there is no dead zone in the deep cavity crushing, which could avoid blockage effectively, improving the production efficiency.

Continuous collaboration with laboratories enables state-of-the-art technological innovations in the durability of wear parts and the reliability of mechanical components, extending the service life of the whole set of equipment, among which, the movable plate is made of high-speed steel castings, and the eccentric shaft is processed by forging blanks, which makes the equipment more reliable, efficient and durable.

The PE series jaw crusher can be driven by a diesel generator and an electric motor. The diesel enters the generator to drive the belt and the pulley, and the eccentric shaft moves the movable plate up and down for the operation. Or use electricity for operation.

But in general, customers will still prepare a backup generator to prevent the mine from being too far away from the city. The power of a PE-400600 crusher generator is 30KW, and the cost is 37-40 yuan if using 30KW electricity (it is different in different countries). The specific generator to be configured is determined by the customer's site conditions and budget.

The performance and the overall structure of the crusher have been improved by reasonable design, thus easy operation and convenient maintenance increase the plant's global availability and profitability.

The development of the PE series jaw crusher demonstrates that the manufacturer has been focusing on customer success by combining the best technology solutions and providing reliability to allow our customers to focus on their own operations.

With professional production technology and export experiences for 40 years, we understand exactly the different needs of customers in various countries. And PE series products are mainly exported to India, Brazil, Vietnam and other countries.

We also have established a sandstone equipment research institute, established an international advanced production line and a first-class modern testing base to R&D the innovative equipment, making the PE series jaw crusher closely fit the customer's actual production needs.

River pebble is a kind of purely natural stone which loses its irregular angle by gravel collision under the action of crustal movement and running water. It is buried in the ground and silenced for millions of years together with the sediment.

There are many pebbles in the sea, smooth, round, and the color more abundant. Therefore, the demand is larger and the price is higher. The Philippines is strategically surrounded by the sea with many rivers on the island, so it is rich in pebble resources.

River pebble has natural characteristics of compression, wear and corrosion resistance which is ideal for green building and important material for making pebble sand after the procedures of crushing, sand making, and screening. It is widely used in the engineering field of water conservancy and hydropower, high-grade highways, bridges, airport runways, municipal works, and high-rise buildings, also as an aggregate for concrete. The pebbles have a high application value for its rich resources and low collection cost.

In March 2017, our promoters contacted a quarry manager from Mindanao, the Philippines on a social platform. The manager told us that he was looking for a suitable machine to reduce the 25-40 cm river pebble to Sand1. -5 mm and 1/4, 1/2, 3/4 stones (6.35 mm, 12.7 mm, 19.05 mm), and expected to process 200 tons per hour.

He also said that he would not start his project before he solved the problem of what kind of equipment is suitable for him, for his mining site was on a remote beach on the island which had rich pebble resources, but the temperature was high, and the rainy season was coming, so the customer worried that the equipment could not withstand the high temperature and humid environment.

After understanding his situation, we designed a sandstone production line suitable for him, including ZSW490110 vibrating feeder, PE7501060 jaw crusher, conveyor, HXCYS400 cone crusher, 3YK2870 vibrating screen, XS3020 sand washer, etc.

Knowing that the customer's site was not very steep, Hongxing advised a fixed machine for him which has a stable operation and less investment than the mobile crusher plant. As for the question that whether can the machine work normally under the high-temperature and humid environment? The answer is yes. But the customer must do the daily maintenance of the machine that we would teach them.

Rainwater enters the inside of the machine, which will corrode the inside of mechanical parts to accelerate mechanical wear and increase mechanical failure. It always causes the bigger problem because of its invisible corrosion, so the operators should take effective measures according to local weather conditions and air pollution at that time to reduce the impact of chemical corrosion on machinery, with emphasis on preventing rainwater from invading machinery. If necessary, you can build a plastic greenhouse or cover.

Every part has its own normal range of temperature. It is necessary to check every the value on various thermometers frequently for its smooth working, otherwise, the machine will be damaged. There are two cooling systems should be paid more attention. For water-cooled machinery, it must be checked before daily work to add cooling water, and for air-cooled machinery, the dust on the air-cooled system should be cleaned regularly to ensure smooth air circulation.

The PE jaw crusher can process materials with a side length of 100-500 mm with the characteristics of large crushing ratio and producing cubic end materials. The PE7501060 jaw crusher is used as the primary crushing equipment for the river pebble with the feed size of 25-40 cm. The big size of the material must be crushed into different granularity by the jaw crusher for secondary crushing.

And the selection is just like this: raw and bigger materials - vibrating feeder - jaw crusher (the primary crushing) - belt conveyor - cone crusher (the secondary crushing) - belt conveyor - vibrating screens (different sizes of end materials). Different granularity can meet the requirements of different specifications of customers.

In the past two years, our crushing equipment has been running smoothly in this mining site. We also conduct regular return visits to the equipment there and help customers with any problem in time. We will also go to the customer's location at any time they need us to inspect and maintain the equipment on the spot, hoping to help our valued Filipino customers reduce losses and expand benefits.

The customer also gave a very high evaluation of our equipment and services. The manager once told the technical manager: "Before you find me, I have contacted several companies from all over the world, but very few of them puts me in the place to consider for me. Only you have tirelessly helped me customize the machine and production plan, and led the technicians to give us professional guidance in production debugging. I am very grateful to you that you helped me complete my project. Now the equipment is running well, and the sand and gravel produced are sold to the construction company. My success is inseparable from your help and guidance."

compact primary crusher for above and underground applications

We are very excited about the SUPERIOR MKIII 6275UG. As a direct response to the market demand, weve designed a more compact primary gyratory crusher reducing CAPEX that is applicable to both underground and above ground applications for the mining industry.

Additional requirements for an underground crusher were the ability to transport the components down shafts with spacial restrictions, assemble the crusher with minimal need for welding and hot works, and the ability to feed the crusher from 360 degrees around the feed opening; these were all met with the 6275UG MKIII.

The 6275UG crushers feed opening is 15% larger than in similar crushers, while also reaching up to 30% more capacity than comparable crushers. Optimized production can be ensured with advanced automation.

Some additional key design targets for this new crusher were less downtime and easy maintenance. In MKIII UG, downtime can be reduced by up to 70% thanks to concave replacements with another Metso Outotec proprietary innovation, the Rotable Topshell.

The SUPERIOR MKIII 6275UG is designed to be part of a SmartStation, where productivity and availability are optimized with sophisticated automation in each phase of the process.Incoming material analysis is done automatically with VisioTruck, and Metso Outotec Metrics provide analytical dashboards and condition monitoring to ensure optimal crusher performance. A consistent vault level is ensured with automatic crusher adjustments. VisioRock and control system is used for wear compensation.