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coal gangue crushing and screening - jxsc mine

Coal gangue is a kind of pollution sources which produced in coal mining. It can recycle via coal gangue crushing and screening. The gangue discharged from coal mining is composed of various kinds of rocks, the hardness and calorific are different. Analyzes the effect that different crushers machine crushing gangue.

Coal Gangue is a kind of solid waste discharged from coal mining and coal washing. It is also a kind of black-gray rock with lower carbon content and harder than coal. Its main components are Al2O3 and SIO2. In addition, it contains various amounts of Fe2O3, Cao, MgO, Na2O, K2o, P2O5, SO3 and traces rare elements (gallium, vanadium, titanium, cobalt).

The rock mineral composition of coal waste. The sedimentary rocks in coal seams include carbonaceous shale, sandstone, siltstone, inferior coal and so on. Sandstone is sometimes gray, sometimes white, and can clearly see silt grains, irregular fracture. The structure of the sandstone is hard and rough. Carbonaceous rock is black, black gray mostly, and the surface has grease. Carbonaceous rocks are more brittle with layered and lamellar structure. It can be easily crushed down in crushing processing. Poor quality coals are visible to the naked eye as they contain coal, which will break off when hard objects are struck. The calorific value of different composition coal gangue is different. This difference provides data analysis for the crushing and separation of coal residue.

In an experiment that uses jaw crusher crush gangue, screening the crushed gangue and measure the calorific value. It is generally found that the calorific value is inversely proportional to the number of breakages. The more broken coal gangue is, the lower the calorific value is.

Through the research and analysis of laboratory crushing, washing and discharging gangue sampling, brick factory crushing gangue sampling and coal sampling in power plants. It is found that there is an inverse relationship between calorific value and particle size. If we make good use of this relationship, and then through the appropriate screening process classification, the separation effect is better. The small particle size of gangue and high heat value can be selected by the gangue power plant. The middle one can be selected by the gangue brick plant. The rest with large particle size and low heat value can be selected by the concrete plant as raw material. The following is a comparative analysis of various crushers.

After the action of the jaw crusher, more coal gangue particles larger than 4.75 mm are collected. After screening, the difference of the calorific value of various particle sizes is very small, and the separation effect is just so so. The main reason is that the jaw crusher is usually used to crush the material with larger particle sizes. But the coal washery gangue particle size is usually less than 200mm. So the relatively small particle size will leak out from the large discharge port and no crushed. If the choice of small size, discharge mouth narrow crusher equipment, the crushing efficiency will be greatly reduced. It doesnt meet the requirements of the production crushing index.

Unlike the jaw crusher, the material particle size after double roller crusher crushing and extruding is fine. There is no regular change in the calorific value of various particle sizes after sieving. Due to the specific crushing mode of roll crusher, the material crushing is more adequate. If crusher the coal waste which is more easily crusher, all the components will be crushed to smaller particles. The high-heat materials will not be an effective classification, and the separation effect is not good.

Compared with the jaw crusher and roller crusher, the impact crusher has a better crushing effect. The particle size of the broken gangue has an obvious inverse relationship with the calorific value. Gangue is the impact crusher by the hammer, the gangue itself, the impact plate repeatedly impact. In many times of impact, the gangue first from the brittle high and structure of the place broken. So the impact crusher has the other two crushers without characteristics of selective crushing. The separation effect is better than the jaw crusher and roller crusher.

The ring hammer crusher impacts the material with a movable hammer which causes the material to collide with the hammer body, the crushing plate, and with each other, then to be crushed. It is roughly the same as an impact crusher. The difference is that the crushing cavity of the ring hammer crusher is smaller. The ring hammer crusher can also adjust the size of discharge by changing the sieve plate with different sieve aperture.

The coal waste particle after crushed by a single-stage hammer crusher, the smaller the particle size, the bigger the calorific value, and the inverse relationship exists between the two. The calorific value of particle which less than 4.75 mm is larger than raw coal gangue. Therefore, it is feasible to separate the broken calorific value of coal gangue.

However, the proportion of particles which larger than 4.75 mm was higher, and a lot of uncrushed coal gangue. So, it can be seen that the crushing effect of this process is not good. The reason is that the size of the washed gangue is not large(usually less than 200mm). But the ratio of crushing of single-stage hammer crusher is large, crushing materials are generally larger than 600 mm. Therefore, some coal gangue will leakage from the hammer body after it from the inlet into the machine internal.

The crushed coal gangue which crushes by impact crusher, the small and big size is more, and the medium particle size is less. It also shows that the rocks in which harder mill and low calorific value are not excessively broken into powder, mass which is hard to be crushed and has low calorific value is not excessively broken into powder. The separation effect of coal gangue with high calorific value is better.

The upper part of the new coal gangue crusher is an umbrella-like structure, and the top part is provided with feeding holes. When the material enters the equipment, the gangue will be evenly dispersed by the distributing device, and the coal waste can also be temporarily stored in the middle space of the distributing device.

The working principle: After the coal gangue is sent to the crusher by the belt conveyor, the distributing device first plays the role which pours the coal gangue into two paths. The two ways of gangue are effectively dispersed, so as to effectively improve the efficiency of two parts of gangue self-impact crushing. The new type of coal gangue crusher can achieve the ideal impact crushing effect and improve the separation efficiency.

After the coal gangue is broken, it needs to use the screening equipment to screen out the different sizes of crushed particles, then sort and use them. Types of screens are vibrating screen, horizontal screen, inclined screen, circular vibrating screen, etc. Different screening tools are selected according to the different crushing plant.

Jiangxi Shicheng stone crusher manufacturer is a new and high-tech factory specialized in R&D and manufacturing crushing lines, beneficial equipment,sand-making machinery and grinding plants. Read More

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Dewo machinery can provides complete set of crushing and screening line, including Hydraulic Cone Crusher, Jaw Crusher, Impact Crusher, Vertical Shaft Impact Crusher (Sand Making Machine), fixed and movable rock crushing line, but also provides turnkey project for cement production line, ore beneficiation production line and drying production line. Dewo Machinery can provide high quality products, as well as customized optimized technical proposal and one station after- sales service.

The vertical compound crusher is widely used for crushing various materials, such as stone, granite, trap rock, coke, coal, manganese ore, iron ore, emery, fused aluminum, oxide, fused calcium carbide, limestone, quartzite and alloys. Features of Compound Crusher: (1) The structure is reasonable and simple and the operation cost is low.

Structure chart of compound crusher. Compound cone crusher is mainly used for crushing raw materials and clinker in small and medium sized cement plant, and it can also be used for breaking sandstone, gypsum, coal gangue, and other materials with medium hardness.

Stone Crusher Ebay Stone Crushers Senegal. Used German Stone Crushers. Oct 11 2018 German hard rock stone crushersSmall hard rock jaw crusher is a mainly used for metallurgical mining chemical cement german manufacturer of stone crushers - leninsused stone crusher. . Stone Crusher for sale in Senegal OLX Senegal offers online local classified ...

PE 15x250 small stone crusher, jaw crusher with capacity 1-3t/h P roduct description: PE Jaw Crusher is our company set the successful experience in similar products at home and abroad, for mining, smelting, building material, highway, railway, water conservancy, road construction and other industrial sectors quarries and rock crusher specially designed.

PFL Series Vertical Complex Crusher Discharge granularity 3,7090 Processing Capacity 8120th Application Fields it is mainly used in small and medium cement plant. Applied material medium soft iron ore, sandstone, blast furnace slag, coal gangue, lump coal, metallurgy solvent, etc. PFL series crushers are developed by our company which combined ...

compound crusher|combination crusher|compound cone crusher-stone crushing machine - henan fote machinery co., ltd

Compound crusher is a new type of highly efficient fine crushing machine integrated with the advantages of hammer crusher and impact crusher, and it has the outstanding advantages of big production capacity, high crushing efficiency, big crushing ratio, small abrasion amount, low energy consumption, good sealing property, stable operation and convenient maintenance. When it is used for crushing limestone, coal, gangue and cement clinker in building material companies, compound crusher can obviously reduce the feeding granularity and improve the output of the grinding mill, so that it is an ideal energy-saving crushing machine.

Compound crusher has ideal crushing effect when crushing the materials with high water content. The discharging granularity can be freely adjusted; and there is no grating bar, so that even materials with high mud content will not block the machine and the non-crushable materials can be automatically discharged without damaging the equipment.

Massive ores fall on the material dumping plate inside the crushing chamber, and under the eccentric force, it throws the materials onto the internal wall of the cylinder, and the materials will violently hit the impact plate installed on the internal wall, and at the same time, the materials hit with each other, so that the materials will be crushed or a lot of hairline fissure will be produced. Then the materials go into cone rotor chamber and spirals down in the cone space, after impacting and squeezing, the materials with fissure will be further crushed. Due to the slope between the cone rotor and the lining plate, the small materials are pushed to move down to automatically realize classification and crushing from big size to small size. Inside the cone rotor chamber, the materials are impacted by the hammer, and the materials running with high speed will hit with the impacting plate again, and the materials will also hit with each other, thus improving the crushing efficiency.

Compound crusher is a new type of highly efficient fine crushing machine integrated with the advantages of hammer crusher and impact crusher, and it has the outstanding advantages of big production capacity, high crushing efficiency, big crushing ratio, small abrasion amount, low energy consumption, good sealing property, stable operation and convenient maintenance. When it is used for crushing limestone, coal, gangue and cement clinker in building material companies, compound crusher can obviously reduce the feeding granularity and improve the output of the grinding mill, so that it is an ideal energy-saving crushing machine.

Compound crusher has ideal crushing effect when crushing the materials with high water content. The discharging granularity can be freely adjusted; and there is no grating bar, so that even materials with high mud content will not block the machine and the non-crushable materials can be automatically discharged without damaging the equipment.

Massive ores fall on the material dumping plate inside the crushing chamber, and under the eccentric force, it throws the materials onto the internal wall of the cylinder, and the materials will violently hit the impact plate installed on the internal wall, and at the same time, the materials hit with each other, so that the materials will be crushed or a lot of hairline fissure will be produced. Then the materials go into cone rotor chamber and spirals down in the cone space, after impacting and squeezing, the materials with fissure will be further crushed. Due to the slope between the cone rotor and the lining plate, the small materials are pushed to move down to automatically realize classification and crushing from big size to small size. Inside the cone rotor chamber, the materials are impacted by the hammer, and the materials running with high speed will hit with the impacting plate again, and the materials will also hit with each other, thus improving the crushing efficiency.

how a roller crusher crush coal gangue | fote machinery

Coal gangue is an abandoned rock discharged during coal mining and processing. When mining coal, the rock layers or bottom plates from the roof of the coal seam, as well as the various types of rock excavated and blasted from around the coal seam during the excavation are all called coal gangue.

Coal gangue utilization is an important part of comprehensive utilization of resources. The utilization of coal gangue can increase the economic benefits of coal enterprises, improve coal mine production structure and environmental quality.

In China, the total installed capacity of generators of low calorific value fuel such as coal gangue reached 28 million kW, and the single unit capacity was from 6 to 300 MW. The annual utilization of coal gangue was 140 million tons, and the annual power generation was 160 billion kWh.

Since the 1970s, the US Bureau of Mines has sampled and analyzed all coal gangue hills and made comprehensive plans for coal gangue utilization. For example, the heat energy is directly recovered from the burning coal gangue mountain for both recovering the heat and controlling pollution.

Because coal gangue brick products have characteristics of lightweight, high strength, good load-bearing seismic performance, excellent thermal insulation, heat insulation and sound insulation, so it is a broad market.

Road construction and backfilling are also important ways for comprehensive utilization of coal gangue. The use of coal gangue as engineering packing materials do not require an increase in cost and need a large amount of use, which brings good economic efficiency to the coal mine.

There are three main types of coal gangue for chemical use: the first is to extract a rare element in coal gangue by various methods, such as Ga, Se, Ti, Co, etc. The second is to recover beneficial mineral products such as kaolin; the third is the production of silicon, aluminum, sulfur and other inorganic chemical products.

The use of coal gangue fertilizer is mainly based on the fact that coal gangue contains rich organic carbon, and the organic matter content in the soil can be greatly increased after being applied to the soil.

The roll crusher is mainly suitable for fine crushing operations with a feed size of less than 150 mm and a finished product size of 100 mesh to 2 mm. What are the advantages of the roll crusher in use?

Compared with the striking type crushing equipment, the biggest disadvantage of the roll crusher is that the "crushing ratio" is relatively small, the particle size of the product changes with the wear of the gap of the roller, and the crushing effect on the sheet-like material is poor.

Therefore, the most important thing about using the roll crusher is the method of stepwise crushing. When crushing coal gangue, it should go through three processes of "coarse-middle-fine crushing".

The surface of the roll crusher is easily worn to grooves and makes the gap between the rolls larger, thereby reducing the crushing effect. When the roller is new, the gap between the two rollers is the smallest, and the fineness of the crushing is the best.

Therefore, to obtain a good coal gangue crushing product, the work we have to do is to minimize the variation value from fine to coarse, and to control the crushing particle size within the allowable range to ensure the quality of the product.

When crushing coal gangue, to achieve the target particle size, three processes of "coarse-middle-fine crushing" are usually carried out. According to the previous configuration experience, we configure a detailed crushing production line for the 10t/h coal gangue:

Raw material warehouseGZD6502300 vibrating feederPE400600 jaw crusher2PG0640 roll crusher3YK1237 vibrating screenDMC64 dust collectorfinished silo (also several B500 conveyors of different lengths).

It can be seen from the above that when there are three specifications of the finished coal gangue, the jaw crusher can be used as the first crush, and the roll crusher is used for the medium and fine crushing.

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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.

compound crusher, vertical crusher, combination crusher - ftm crusher company

Compound crusher is also named as vertical crusher, which is suitable to crush materials like coal gangue, fly ash, sandstone, gypsum, weather stone, etc. Since the compound crusher has unique features and remarkable advantages, it is the most ideal and effective equipment for coal plants, brick factories and small-sized aggregate plants, etc.

Compound crusher features in great crushing ability and efficiency. It is mainly used for tertiary crushing and coarse grinding. Since the water content in raw material has little influence on vertical crusher, users can deal the raw material with high water content inside. Whats more, users can adjust the discharging size of vertical crusher arbitrarily.

Since the bearing is located horizontally, thus the combination crusher is able to crush material with high temperature like cement clinker. There is no grating device in vertical crusher, thus the sedimented material will not block the machine and foreign matter will discharge out automatically. Since the rotor has unique structure, it can not be worn away. At the end of crushing cavity, there is a screw rod or hydraulic device, which makes the changes for easy-wearing parts more easily.

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Dewo machinery can provides complete set of crushing and screening line, including Hydraulic Cone Crusher, Jaw Crusher, Impact Crusher, Vertical Shaft Impact Crusher (Sand Making Machine), fixed and movable rock crushing line, but also provides turnkey project for cement production line, ore beneficiation production line and drying production line. Dewo Machinery can provide high quality products, as well as customized optimized technical proposal and one station after- sales service.

Clinker Crushing Line. Clinker refers to clay, pre-fired ceramic materials that has been burned too much in the kiln. Generally, gypsum is also added to the molding material formula for increasing strength, and increasing hardness when fired. Clinker is also used in the manufac.

vertical compound crusher for limestone crushing line. Vertical Compound Crusher - CFTC stone crusher plant ... Vertical Compound Crusher Feature. 1.High crushing ratio, adjustable discharging size. 2.No grates device, not easily blocking for crushing high moisture, sediment materials.

Crushing is the first step of mineral processing where the ore/rocks from the mine ... processed are Limestone, Granite, Gabbro, Basalt, River Stone, Coal Gangue, ... compound cone crusher, spring cone crusher, hydraulic cone crusher and gyratory crusher. ... 5.6 Vertical shaft impactor (VSI) =VSI crusher:.

Huahong High Quality Composite Crusher/combined Crusher For Hard Stone/composite Crusher Used For Limestone,Dolomite,Gravel , Find Complete Details about Huahong High Quality Composite Crusher/combined Crusher For Hard Stone ...

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Clinker crusher Clinker stone crusher CFTC. Solution I Jaw crusher Impact crusher This production line is one of classic design for crushing With the unique vortex type three crushing cavities of the impact crusher it produces the final product of high quality aggregate with character of uniformity in size and cubical in shape

Vertical Shaft Compound Crusher Model. Vertical compound crusher is shorted for compound crusher, is one of the common equipment in crushing plant and sand making plant. Email: [email protected] Tel: We have 40 years of experience in mechanical manufacturing and provide you with the most sophisticated equipments.

Dewo machinery can provides complete set of crushing and screening line, including Hydraulic Cone Crusher, Jaw Crusher, Impact Crusher, Vertical Shaft Impact Crusher (Sand Making Machine), fixed and movable rock crushing line, but also provides turnkey project for cement production line, ore beneficiation production line and drying production line.