iron cone crusher

nordberg hp series cone crushers - metso outotec

Nordberg HP Series cone crushers are characterized by the optimized combination of crusher speed, eccentricity, and cavity profile. This mix has proved revolutionary, providing higher capacity, better product quality and suitability to a wider range of applications.

From limestone to compact hematite, from ballast to manufactured sand production, and from small aggregate plants to large mining operations, Nordberg HP crushers are unbeatable in secondary, tertiary, and quaternary applications.

Nordberg HP crushers feature a unique combination of crusher speed, throw, crushing forces and cavity design. This combination is renowned for providing higher capacity and superior end-product quality in all secondary, tertiary and quaternary applications.

In a size-class comparison, Nordberg HP crushers have a higher output capacity, higher density in the crushing chamber, better reduction ratio, and they produce higher on-spec yield end products with the same energy consumption.

Nordberg HP crushers produce finer products by limiting crushing stages, which lowers your investment cost and saves energy. This is achieved through a combination of optimized speed, large throw, crushing chamber design and increased crushing force. The efficient crushing action of the best power utilization per cone diameter.

Designed for your needs, Nordberg HP crushers are safe and easy to maintain. Fast and easy access to all the main components from the top, and dual-acting hydraulic cylinders significantly reduce downtime and are more environmentally friendly.

Nordberg HP crushers are engineered to ensure maximum operator safety and easy maintenance. The crushers have an access from the top of the crusher to the principal components, an easy access for liner maintenance, and mechanical rotation of the bowl for removal with a simple press of a button. Maintenance tools are also available.

With Metso IC70C you can control maintenance, setting modifications, production follow-up and data extraction. All parameters can be adapted to your plant characteristics, and you can easily do all this close to the crusher or remotely from the control room.

You set the goals and Metso IC70C helps you reach them. It allows you to monitor the feeding, change the settings automatically depending on the load or liners wear, and select the product size distribution according to your preference of coarse or fine aggregate production.

Get the maximum potential out of your size reduction process to achieve improved crushing performance and lower cost per ton. By using our unique simulation software, our Chamber Optimization experts can design an optimized crushing chamber that matches the exact conditions under which you operate.

gyratory crusher - an overview | sciencedirect topics

Gyratory crushers were invented by Charles Brown in 1877 and developed by Gates around 1881 and were referred to as a Gates crusher [1]. The smaller form is described as a cone crusher. The larger crushers are normally known as primary crushers as they are designed to receive run-on-mine (ROM) rocks directly from the mines. The gyratory crushers crush to reduce the size by a maximum of about one-tenth its size. Usually, metallurgical operations require greater size reduction; hence, the products from the primary crushers are conveyed to secondary or cone crushers where further reduction in size takes place. Here, the maximum reduction ratio is about 8:1. In some cases, installation of a tertiary crusher is required where the maximum reduction is about 10:1. The secondary crushers are also designed on the principle of gyratory crushing, but the construction details vary.

Similar to jaw crushers, the mechanism of size reduction in gyratory crushers is primarily by the compressive action of two pieces of steel against the rock. As the distance between the two plates decreases continuous size reduction takes place. Gyratory crushers tolerate a variety of shapes of feed particles, including slabby rock, which are not readily accepted in jaw crushers because of the shape of the feed opening.

The gyratory crusher shown in Figure 2.6 employs a crushing head, in the form of a truncated cone, mounted on a shaft, the upper end of which is held in a flexible bearing, whilst the lower end is driven eccentrically so as to describe a circle. The crushing action takes place round the whole of the cone and, since the maximum movement is at the bottom, the characteristics of the machine are similar to those of the Stag crusher. As the crusher is continuous in action, the fluctuations in the stresses are smaller than in jaw crushers and the power consumption is lower. This unit has a large capacity per unit area of grinding surface, particularly if it is used to produce a small size reduction. It does not, however, take such a large size of feed as a jaw crusher, although it gives a rather finer and more uniform product. Because the capital cost is high, the crusher is suitable only where large quantities of material are to be handled.

However, the gyratory crusher is sensitive to jamming if it is fed with a sticky or moist product loaded with fines. This inconvenience is less sensitive with a single-effect jaw crusher because mutual sliding of grinding surfaces promotes the release of a product that adheres to surfaces.

The profile of active surfaces could be curved and studied as a function of the product in a way to allow for work performed at a constant volume and, as a result, a higher reduction ratio that could reach 20. Inversely, at a given reduction ratio, effective streamlining could increase the capacity by 30%.

Maintenance of the wear components in both gyratory and cone crushers is one of the major operating costs. Wear monitoring is possible using a Faro Arm (Figure 6.10), which is a portable coordinate measurement machine. Ultrasonic profiling is also used. A more advanced system using a laser scanner tool to profile the mantle and concave produces a 3D image of the crushing chamber (Erikson, 2014). Some of the benefits of the liner profiling systems include: improved prediction of mantle and concave liner replacement; identifying asymmetric and high wear areas; measurement of open and closed side settings; and quantifying wear life with competing liner alloys.

Crushers are widely used as a primary stage to produce the particulate product finer than about 50100mm. They are classified as jaw, gyratory, and cone crushers based on compression, cutter mill based on shear, and hammer crusher based on impact.

A jaw crusher consists essentially of two crushing plates, inclined to each other forming a horizontal opening by their lower borders. Material is crushed between a fixed and a movable plate by reciprocating pressure until the crushed product becomes small enough to pass through the gap between the crushing plates. Jaw crushers find a wide application for brittle materials. For example, they are used for comminution of porous copper cake. A Fritsch jaw crusher with maximal feed size 95mm, final fineness (depends on gap setting) 0.315mm, and maximal continuous throughput 250Kg/h is shown in Fig. 2.8.

A gyratory crusher includes a solid cone set on a revolving shaft and placed within a hollow body, which has conical or vertical sloping sides. Material is crushed when the crushing surfaces approach each other and the crushed products fall through the discharging opening.

Hammer crushers are used either as a one-step primary crusher or as a secondary crusher for products from a primary crusher. They are widely used for crushing hard metal scrap for different hard metal recycling processes. Pivoted hammers are pendulous, mounted on the horizontal axes symmetrically located along the perimeter of a rotor. Crushing takes place by the impact of material pieces with the high speed moving hammers and by contact with breaker plates. A cylindrical grating or screen is placed beneath the rotor. Materials are reduced to a size small enough to pass through the openings of the grating or screen. The size of the product can be regulated by changing the spacing of the grate bars or the opening of the screen.

The feature of the hammer crushers is the appearance of elevated pressure of air in the discharging unit of the crusher and underpressure in the zone around the shaft close to the inside surface of the body side walls. Thus, the hammer crushers also act as high-pressure, forced-draught fans. This may lead to environmental pollution and product losses in fine powder fractions. A design for a hammer crusher (Fig. 2.9) essentially allows a decrease of the elevated pressure of air in the crusher discharging unit [5]. The A-zone beneath the screen is communicated through the hollow ribs and openings in the body side walls with the B-zone around the shaft close to the inside surface of body side walls. As a result, the circulation of suspended matter in the gas between A and B zones is established and the high pressure of air in the discharging unit of crusher is reduced.

Crushers are widely used as a primary stage to produce the particulate product finer than about 50100 mm in size. They are classified as jaw, gyratory and cone crushers based on compression, cutter mill based on shear and hammer crusher based on impact.

A jaw crusher consists essentially of two crushing plates, inclined to each other forming a horizontal opening by their lower borders. Material is crushed between a fixed and a movable plate by reciprocating pressure until the crushed product becomes small enough to pass through the gap between the crushing plates. Jaw crushers find a wide application for brittle materials. For example, they are used for comminution of porous copper cake.

A gyratory crusher includes a solid cone set on a revolving shaft and placed within a hollow body, which has conical or vertical sloping sides. Material is crushed when the crushing surfaces approach each other and the crushed products fall through the discharging opening.

Hammer crushers are used either as a one-step primary crusher or as a secondary crusher for products from a primary crusher. They are widely used for crushing of hard metal scrap for different hard metal recycling processes.

Pivoted hammers are pendulous, mounted on the horizontal axes symmetrically located along the perimeter of a rotor and crushing takes place by the impact of material pieces with the high speed moving hammers and by contact with breaker plates. A cylindrical grating or screen is placed beneath the rotor. Materials are reduced to a size small enough pass through the openings of the grating or screen. The size of product can be regulated by changing the spacing of the grate bars or the opening of the screen.

The feature of the hammer crushers is the appearance of elevated pressure of air in the discharging unit of the crusher and underpressure in the zone around of the shaft close to the inside surface of the body side walls. Thus, the hammer crushers also act as high-pressure forced-draught fans. This may lead to environmental pollution and product losses in fine powder fractions.

A design for a hammer crusher (Figure 2.6) allows essentially a decrease of the elevated pressure of air in the crusher discharging unit [5]. The A-zone beneath the screen is communicated through the hollow ribs and openings in the body side walls with the B-zone around the shaft close to the inside surface of body side walls. As a result, circulation of suspended matter in the gas between A- and B-zones is established and high pressure of air in the discharging unit of crusher is reduced.

Jaw crushers are mainly used as primary crushers to produce material that can be transported by belt conveyors to the next crushing stages. The crushing process takes place between a fixed jaw and a moving jaw. The moving jaw dies are mounted on a pitman that has a reciprocating motion. The jaw dies must be replaced regularly due to wear. Figure 8.1 shows two basic types of jaw crushers: single toggle and double toggle. In the single toggle jaw crusher, an eccentric shaft is installed on the top of the crusher. Shaft rotation causes, along with the toggle plate, a compressive action of the moving jaw. A double toggle crusher has, basically, two shafts and two toggle plates. The first shaft is a pivoting shaft on the top of the crusher, while the other is an eccentric shaft that drives both toggle plates. The moving jaw has a pure reciprocating motion toward the fixed jaw. The crushing force is doubled compared to single toggle crushers and it can crush very hard ores. The jaw crusher is reliable and robust and therefore quite popular in primary crushing plants. The capacity of jaw crushers is limited, so they are typically used for small or medium projects up to approximately 1600t/h. Vibrating screens are often placed ahead of the jaw crushers to remove undersize material, or scalp the feed, and thereby increase the capacity of the primary crushing operation.

Both cone and gyratory crushers, as shown in Figure 8.2, have an oscillating shaft. The material is crushed in a crushing cavity, between an external fixed element (bowl liner) and an internal moving element (mantle) mounted on the oscillating shaft assembly. An eccentric shaft rotated by a gear and pinion produces the oscillating movement of the main shaft. The eccentricity causes the cone head to oscillate between the open side setting (o.s.s.) and closed side setting (c.s.s.). In addition to c.s.s., eccentricity is one of the major factors that determine the capacity of gyratory and cone crushers. The fragmentation of the material results from the continuous compression that takes place between the mantle and bowl liners. An additional crushing effect occurs between the compressed particles, resulting in less wear of the liners. This is also called interparticle crushing. The gyratory crushers are equipped with a hydraulic setting adjustment system, which adjusts c.s.s. and thus affects product size distribution. Depending on cone type, the c.s.s. setting can be adjusted in two ways. The first way is by rotating the bowl against the threads so that the vertical position of the outer wear part (concave) is changed. One advantage of this adjustment type is that the liners wear more evenly. Another principle of setting adjustment is by lifting/lowering the main shaft. An advantage of this is that adjustment can be done continuously under load. To optimize operating costs and improve the product shape, as a rule of thumb, it is recommended that cones always be choke-fed, meaning that the cavity should be as full of rock material as possible. This can be easily achieved by using a stockpile or a silo to regulate the inevitable fluctuation of feed material flow. Level monitoring devices that detect the maximum and minimum levels of the material are used to start and stop the feed of material to the crusher as needed.

Primary gyratory crushers are used in the primary crushing stage. Compared to the cone type crusher, a gyratory crusher has a crushing chamber designed to accept feed material of a relatively large size in relation to the mantle diameter. The primary gyratory crusher offers high capacity thanks to its generously dimensioned circular discharge opening (which provides a much larger area than that of the jaw crusher) and the continuous operation principle (while the reciprocating motion of the jaw crusher produces a batch crushing action). The gyratory crusher has capacities starting from 1200 to above 5000t/h. To have a feed opening corresponding to that of a jaw crusher, the primary gyratory crusher must be much taller and heavier. Therefore, primary gyratories require quite a massive foundation.

The cone crusher is a modified gyratory crusher. The essential difference is that the shorter spindle of the cone crusher is not suspended, as in the gyratory, but is supported in a curved, universal bearing below the gyratory head or cone (Figure 8.2). Power is transmitted from the source to the countershaft to a V-belt or direct drive. The countershaft has a bevel pinion pressed and keyed to it and drives the gear on the eccentric assembly. The eccentric assembly has a tapered, offset bore and provides the means whereby the head and main shaft follow an eccentric path during each cycle of rotation. Cone crushers are used for intermediate and fine crushing after primary crushing. The key factor for the performance of a cone type secondary crusher is the profile of the crushing chamber or cavity. Therefore, there is normally a range of standard cavities available for each crusher, to allow selection of the appropriate cavity for the feed material in question.

Depending on the size of the debris, it may either be ready to enter the recycling process or need to be broken down to obtain a product with workable particle sizes, in which case hydraulic breakers mounted on tracked or wheeled excavators are used. In either case, manual sorting of large pieces of steel, wood, plastics and paper may be required, to minimise the degree of contamination of the final product.

The three types of crushers most commonly used for crushing CDW materials are the jaw crusher, the impact crusher and the gyratory crusher (Figure 4.4). A jaw crusher consists of two plates, with one oscillating back and forth against the other at a fixed angle (Figure 4.4(a)) and it is the most widely used in primary crushing stages (Behera etal., 2014). The jaw crusher can withstand large and hard-to-break pieces of reinforced concrete, which would probably cause the other crushing machines to break down. Therefore, the material is initially reduced in jaw crushers before going through any other crushing operation. The particle size reduction depends on the maximum and minimum size of the gap at the plates (Hansen, 2004).

An impact crusher breaks the CDW materials by striking them with a high-speed rotating impact, which imparts a shearing force on the debris (Figure 4.4(b)). Upon reaching the rotor, the debris is caught by steel teeth or hard blades attached to the rotor. These hurl the materials against the breaker plate, smashing them into smaller particle sizes. Impact crushers provide better grain-size distribution of RA for road construction purposes, and they are less sensitive to material that cannot be crushed, such as steel reinforcement.

Generally, jaw and impact crushers exhibit a large reduction factor, defined as the ratio of the particle size of the input to that of the output material. A jaw crusher crushes only a small proportion of the original aggregate particles but an impact crusher crushes mortar and aggregate particles alike and thus generates a higher amount of fine material (OMahony, 1990).

Gyratory crushers work on the same principle as cone crushers (Figure 4.4(c)). These have a gyratory motion driven by an eccentric wheel. These machines will not accept materials with a large particle size and therefore only jaw or impact crushers should be considered as primary crushers. Gyratory and cone crushers are likely to become jammed by fragments that are too large or too heavy. It is recommended that wood and steel be removed as much as possible before dumping CDW into these crushers. Gyratory and cone crushers have advantages such as relatively low energy consumption, a reasonable amount of control over the particle size of the material and production of low amounts of fine particles (Hansen, 2004).

For better control of the aggregate particle size distribution, it is recommended that the CDW should be processed in at least two crushing stages. First, the demolition methodologies used on-site should be able to reduce individual pieces of debris to a size that the primary crusher in the recycling plant can take. This size depends on the opening feed of the primary crusher, which is normally bigger for large stationary plants than for mobile plants. Therefore, the recycling of CDW materials requires careful planning and communication between all parties involved.

A large proportion of the product from the primary crusher can result in small granules with a particle size distribution that may not satisfy the requirements laid down by the customer after having gone through the other crushing stages. Therefore, it should be possible to adjust the opening feed size of the primary crusher, implying that the secondary crusher should have a relatively large capacity. This will allow maximisation of coarse RA production (e.g., the feed size of the primary crusher should be set to reduce material to the largest size that will fit the secondary crusher).

The choice of using multiple crushing stages mainly depends on the desired quality of the final product and the ratio of the amounts of coarse and fine fractions (Yanagi etal., 1998; Nagataki and Iida, 2001; Nagataki etal., 2004; Dosho etal., 1998; Gokce etal., 2011). When recycling concrete, a greater number of crushing processes produces a more spherical material with lower adhered mortar content (Pedro etal., 2015), thus providing a superior quality of material to work with (Lotfi etal., 2017). However, the use of several crushing stages has some negative consequences as well; in addition to costing more, the final product may contain a greater proportion of finer fractions, which may not always be a suitable material.

The first step of physical beneficiation is crushing and grinding the iron ore to its liberation size, the maximum size where individual particles of gangue are separated from the iron minerals. A flow sheet of a typical iron ore crushing and grinding circuit is shown in Figure 1.2.2 (based on Ref. [4]). This type of flow sheet is usually followed when the crude ore contains below 30% iron. The number of steps involved in crushing and grinding depends on various factors such as the hardness of the ore and the level of impurities present [5].

Jaw and gyratory crushers are used for initial size reduction to convert big rocks into small stones. This is generally followed by a cone crusher. A combination of rod mill and ball mills are then used if the ore must be ground below 325 mesh (45m). Instead of grinding the ore dry, slurry is used as feed for rod or ball mills, to avoid dusting. Oversize and undersize materials are separated using a screen; oversize material goes back for further grinding.

Typically, silica is the main gangue mineral that needs to be separated. Iron ore with high-silica content (more than about 2%) is not considered an acceptable feed for most DR processes. This is due to limitations not in the DR process itself, but the usual customer, an EAF steelmaking shop. EAFs are not designed to handle the large amounts of slag that result from using low-grade iron ores, which makes the BF a better choice in this situation. Besides silica, phosphorus, sulfur, and manganese are other impurities that are not desirable in the product and are removed from the crude ore, if economically and technically feasible.

Beneficiation of copper ores is done almost exclusively by selective froth flotation. Flotation entails first attaching fine copper mineral particles to bubbles rising through an orewater pulp and, second, collecting the copper minerals at the top of the pulp as a briefly stable mineralwaterair froth. Noncopper minerals do not attach to the rising bubbles; they are discarded as tailings. The selectivity of the process is controlled by chemical reagents added to the pulp. The process is continuous and it is done on a large scale103 to 105 tonnes of ore feed per day.

Beneficiation is begun with crushing and wet-grinding the ore to typically 10100m. This ensures that the copper mineral grains are for the most part liberated from the worthless minerals. This comminution is carried out with gyratory crushers and rotary grinding mills. The grinding is usually done with hard ore pieces or hard steel balls, sometimes both. The product of crushing and grinding is a waterparticle pulp, comprising 35% solids.

Flotation is done immediately after grindingin fact, some flotation reagents are added to the grinding mills to ensure good mixing and a lengthy conditioning period. The flotation is done in large (10100m3) cells whose principal functions are to provide: clouds of air bubbles to which the copper minerals of the pulp attach; a means of overflowing the resulting bubblecopper mineral froth; and a means of underflowing the unfloated material into the next cell or to the waste tailings area.

Selective attachment of the copper minerals to the rising air bubbles is obtained by coating the particles with a monolayer of collector molecules. These molecules usually have a sulfur atom at one end and a hydrophobic hydrocarbon tail at the other (e.g., potassium amyl xanthate). Other important reagents are: (i) frothers (usually long-chain alcohols) which give a strong but temporary froth; and (ii) depressants (e.g., CaO, NaCN), which prevent noncopper minerals from floating.

sichuan y&j industries co., ltd. - official site

Sichuan Y&J Industries Co., Ltd is specialized in customized mechanical parts and components made by casting and machining process for a variety of material, including carbon steel, alloy steel, stainless steel, grey iron, and ductile iron. Utilizing both sand casting and investment casting processes we are able to provide a wide range of product weight. We are dedicated to providing high-quality and comprehensive solutions to customers. Thanks to our extensive expertise and strict adherence to customers requirement our products are sold all over the world. Among the customer list are many well-known companies, like EMERSON, SAMSON, ITT, FLOWSERVE, FLSMITH, ASTEC INDUSTRIES, SUPERIOR INDUSTRIES, RIO TINTO, LIBERTY STEEL, etc.

Y&J specializes in sand casting process in various shapes and sizes weighing from 0.1Kg to 10,000kg. Material we supply are Carbon Steel, Alloy Steel, Stainless Steel, Grey Iron, and Ductile Iron in accordance with the specifications of ASTM, SAE, AISI, ACI, DIN, EN, ISO, and GB standards. To accommodate customers' versatile demand today Y&J foundries have both automatic and manual molding for the process of green sand, sodium silicate-bonded sand, resin sand, shell core and shell mold, etc.

Y&J produces investment casting with three types of process, Silica gel (Green Wax), Sodium silicate (Water glass or Yellow Wax), or combined type. The material we pour includes carbon steel, alloy steel, Stainless steel, heat-resistant steel with a weight range from 0.05 to 100 kg. Based on demand and application of products, Y&J will choose the process cost-wisely for our customers.

Our state-of-the-artfacilities and equipment allow us to offer our clients comprehensive machining service including milling, turning, boring, grinding, drilling, wire cutting, and more. With ongoing investment, today Y&J is equipped with first-class high-precision 5 axial CNC machining center, CNC gantry milling & boring machine, CNC horizontal & vertical lathes, CNC honing machine and CNC deep-hole internal grinders as well as many other conventional equipment.

In this special year, Y&J Industries will proudly be participating in the upcoming Power Transmission and Control (PTC ASIA 2020) expo in Shanghai from November 3rd to the 6th at the Shanghai New International Expo Center(SNIEC)- Pudong. Come visit our b

how does the cone crusher develop? | fote machinery

Cone crusher, being used to crush hard materials, was designed by the American Simmons Brothers in 1920. With nearly 100 years of development, it has become an indispensable role in the line of various medium-hard materials crushing and metal raw ore beneficiation.

It is estimated that about 5-6 billion tons of raw ore need to be crushed and ground each year. In order to meet the rapid development requirements of the construction industry and mining industry, the technology of cone crushing is also progressing.

There are 5 most popular types of cone crushers on the market: spring cone crusher, Symons cone crusher, hydraulic cone crusher, multi-cylinder hydraulic cone crusher, and single cylinder hydraulic cone crusher, according to their advancement. And the advancement mainly manifested in 4 aspects: technology, structure, degree of automation and overall machine control.

Spring cone crusher, as the earliest cone crusher formed by absorbing advanced technology in the 1980s in various countries, is equipped with reinforcing ribs at the heavy load part, and there are 10-16 groups of springs around for the removal of hard materials and iron protection.

After many years of practical experience, in order to avoid the overload of the crusher caused by the large stiffness of the spring, the design was added with a hydraulic cylinder, which is now called Symons cone crusher. The hydraulic cylinder can remove excess material in the crushing cavity in time and reduce downtime, which improves the production efficiency greatly.

With the development of hydraulic technology, the Allis-Chalmers company from America first produced hydraulic cone crusher in 1948. This cone crusher completely abandoned the spring-type safety device and adopted the technology of hydraulic adjustment for changing discharge and overload protection.

And after about ten years of research and improvement of the hydraulic technology, in order to meet the needs of larger capacity, the Nordberg Company in the United States launched a multi-cylinder hydraulic cone crusher. The 10-16 sets of spring cone-broken springs are replaced by 10-16 safety cylinders.

Based on one hydraulic clear cylinder of hydraulic cone crusher, the latter added two other hydraulic cylinders: pushing cylinder and locking cylinder for outlet discharge adjustment and overload protection.

The single-cylinder cone crusher is the most advanced cone crusher with the largest capacity on the market. With the American technology of the lamination crushing principle and the static pressure theory, it is another important breakthrough based on the multi-cylinder hydraulic cone crusher.

On the basis of retaining the functions of the pushing cylinder, locking cylinder and hydraulic cylinder, the three are creatively combined into one to realize one cylinder for three kinds of uses.

Not only the appearance and operation are more concise, but also the improvement of the cavity shape has greatly improved the crushing capacity. Besides, optimizing the details makes the maintenance of the cone crusher easier and more convenient.

From the perspective of the overall structure, the development of the cone crusher tends to be more concise and easier to operate. It is mainly manifested in two aspects: the abandonment of spring safety devices and the development of hydraulic safety devices.

Spring safety devices are used for spring cone crusher and Symons cone crusher. And at the stage of hydraulic cone crusher, they are completely replaced by hydraulic safety devices. More than 50 related parts have also been gradually streamlined, which makes the entire structure simpler and easier to operate and maintain.

The hydraulic safety device has undergone the model of multi cylinders for different uses and one single cylinder with all functions, which reduces production costs and increases capacity effectively. Besides, the structure of the whole crusher is simpler and the operation is more stable.

Types of cone crusher crushing cavity can be divided into 3 types: standard type, medium type, and short head type. The choice of cavity type is determined by the use of ore, the standard type is suitable for medium crushing, the medium type is suitable for fine crushing, and the short head type is suitable for ultra-fine crushing.

As the crusher that rely on extrusion crushing, the grain shape of cone crusher is not as good as the impact crusher. To improve this shortcoming, the multi-cylinder hydraulic cone crusher has added the design of lamination crushing and constant cavity. Based on these, not only the grain shape can be guaranteed, but also the energy consumption and cost can be reduced greatly.

The hydraulic safety device of the single-cylinder cone crusher is designed to be a single cylinder with three functions, which effectively increases the volume of the crushing cavity. The upper part of the crushing cavity is deeper, so its capacity is the largest. With the same diameter of the moving cone, the capacity is 35% -60% higher than the old-fashioned spring cone crusher.

Starting from the multi-cylinder hydraulic cone crusher, the mortar wall and the body, the copper cone sleeve, and the main shaft have been designed with zero gaps. The integrated design makes the disassembly and maintenance of the cone crusher more convenient.

To keep the crusher always in good condition for operating, a complete lubrication system has been provided from the initial spring cone crusher. It is worth mentioning that at the stage of hydraulic cone crusher, the lubrication system is replaced by a more advanced model, thin oil lubrication station. The new lubricating system is smaller in size and simpler to maintain.

In addition, the hydraulic cone crusher uses a non-contact labyrinth seal with no wear, based on the dry oil sealing, which improves the reliability of blocking dust and fundamentally eliminates common faults such as oil-water mixing of spring cone crushers.

The adjustment of spring and Symons cone crusher are in a manual way. Adjustment cap can be tightened to reduce the distance between the mortar wall and the crushing wall. And then the discharge port changes.

From the hydraulic cone crusher, the adjustment of the discharge port became automatic. Gears of hydraulic cone crusher and multi-cylinder hydraulic cone crusher can be turned deasil or widdershins so that to push the pushing cylinder to adjust the discharge port. The only thing being different is its degree of automation. the latter is more advanced.

To save maintenance time, Symons cone crusher, hydraulic cone crusher, and multi-cylinder hydraulic cone crusher are added with the clearing cylinder. When the material of is overloaded, the clearing cylinder will lift the part to discharge the material. Automatic cavity cleaning can effectively reduce downtime and ensure production efficiency.

When the hard material enters into the crushing cavity, it will give an upward force to the bottom of the rolling mortar wall, and force the fixed cone to move upward, then the spring fixed on the support sleeve and the frame will be stretched. As the fixed cone moves up, the gap between the crushing wall and the mortar wall will expand, and the hard material will fall to the discharge port.

Due to the excessive rigidity of the spring, the hydraulic cone crusher and multi-cylinder hydraulic cone crusher use the hydraulic cavity clearing cylinder and locking cylinder hydraulic insurance system for iron protection.

The clearing cylinder will be released by releasing the hydraulic cylinder in the case of iron passing and when the cone crusher be jammed instantly. The support sleeve and the fixed cone part can be lifted to automatically eliminate the faults in the crushing cavity so that the fault can be handled without disassembly.

Controlling the machine manually is time-consuming and laborious. With the continuous development of technology, the design of the hydraulic cone crusher adopts a fully automatic control system, which realizes remote and machine-side control, making the control of machine more convenient.

The multi-cylinder hydraulic and single-cylinder cone crushers use a more advanced full-automatic control system based on PLC + touch screen, which is not only easy to operate, but also more sensitive and reliable in touch.

Cone crusher can crush harder materials compared with other crushers, which determines its irreplaceable position in ore beneficiation and rock crushing line. Over the years, cone crushers have become the mainstay for metal ore beneficiation and high hardness rocks crushing.

As a leading mining machinery manufacturer and exporter in China, we are always here to provide you with high quality products and better services. Welcome to contact us through one of the following ways or visit our company and factories.

Based on the high quality and complete after-sales service, our products have been exported to more than 120 countries and regions. Fote Machinery has been the choice of more than 200,000 customers.

cone crusher vs. impact crusher | quarrying & aggregates

Not every crusher is suitable for every application. When choosing the best crusher for aggregate applications, it is important to understand how the crusher works and its impact on efficiency, operating costs and final products. When designing aggregate processing production line plans, there are usually differences in the choice of impact and cone crusher. What is the difference between impact crusher and cone crusher? Which is the best fine crushing equipment?

For impact crusher, the high-speed rotating rotor throw stone into impact plates, stones are crushed via impact energy produced rotating rotor. So, impact crusher is good to crush soft material of brittle stone.

Initial High-manganese steel is softer than high-chrome steel, but high-manganese steel has features of high tenacity, that means after many times strike and crushing stone, this high-manganese steel will become harder and harder, so, high-manganese steel is usually used to crush hard stone, and its service life will be very long. So, both jaw plates of jaw crusher and bowl liner & mantle of cone crusher are made from high-manganese steel.

High chromium iron is very hard, but it is a little brittle, so, it usually used to crush soft material like lime stone. Therefore, the most common blow bar/hammer material of impact crusher is high chromium iron.

According to our experience in Zambia and Nigeria, most of the local raw materials are hard stones like granite, so most investors or equipment owners in Zambia and Nigeria usually use cone crushers as secondary crushers. Because of its high production efficiency and low maintenance costs for hard stones.

Due to the different types, sizes and uses of stone crushers, and the large investment required to purchase stone crushers, it will make the purchase of equipment difficult. When you are looking for crushers or other aggregate equipment, please contact our aggregate equipment experts to help you make the right choice in the first time.

aggregate washing equipment & screens | portable jaw crusher

At AMI we carry or can locate most brands of used aggregate equipment. If you are looking for a specific piece of used aggregate equipment that we do not currently have in inventory, please contact us and we will gladly assist you in locating the specific item you need.

AMI is a full service aggregate company that can get you the bare equipment, support structures, portable plants, skid mounted plants or complete turnkey systems you need. Please view our past projects and feel free to contact us.

As one of the Astec companies, Telsmith designs, manufactures and markets and services a full line of processing equipment including jaw crushers, cone crushers, impact crushers, screens, and feeders. Brand names such as Iron Giant, Gyrasphere and Vibro-King have gained worldwide recognition for quality and performance.

Hazemag has grown to become a leader of impactor design and control technology. They are very much a part of the North American aggregate and mineral processing scene, serving the cement, aggregate and mineral processing industries. Hazemag impactors are designed with function and simplicity in mind.

Terex Canica has been a leader in the crushing industry since introducing its first Vertical Shaft Impactor. The Terex Canica VSI features gradation control, high product yield with low horsepower per ton, a non-plugging crushing chamber and simple maintenance.

In 2000, the name Thor Steel Welding Ltd. was officially changed to Thor Global Enterprises Ltd. Thor Global continues to lead the competition in terms of continued innovation, strength and simplicity, advanced technology, more standard features than any other manufacturer and the most telescopic experience. Thor has provided hundreds of telescopic machines in the most demanding environments worldwide (North America, South America, Europe, Africa, Australia and the Middle East).

Allied Construction Products, LLC is a leader in innovative construction product technology. Allied designs, manufacturers and distributes these innovative specialty products primarily for the construction and mining industries and for other industries/applications where its products are readily adaptable.

Anaconda Equipment International designs, manufactures and exports an extensive range of mobile screening and mobile stockpiling equipment for use in the mining, quarrying and material recycling industries. Our ranges of tracked and wheeled mounted products are robust, user friendly and easy to move on and off site.