Coal Crusher
Coal & Coke
Coal, a fossil fuel, is the largest source of energy for thegeneration of electricity worldwide, Coal is extracted from the groundby mining, either underground or in open pits. Coal is primarily usedas a solid fuel to produce electricity and heat through combustion.Coal is the workhorse of the nation’s electric power industry. The USAconsumes about 14% of the world total, using 90% of it for generationof electricity, Coal-fired electric generating plants are thecornerstone of the nation’s central power system.
Coal Crushing Production Line
Coal has played an important role in modern industry. The coal isprocessed and crushed to increase the efficiency and protectenvironment. In order to use coal more rationally, efficiently andeffectively, the coal need to be processed and crushed into differentsizes, 0 ~ 25 mm particle size for coal gas stove, 25 ~ 8 mm for steamlocomotive, 25 ~ 6 mm for the industrial furnace, and coal power plantrequires grain coal of 0 ~ 25mm.
The general hardness of coal is 1-4. After coarse crushing by jaw crusher, fine crushing by impact crusher, and sieved by vibrating screen, coal can be processed and crushed into different sizes of therequirements. Shibang jaw crusher, impact crusher for coal crushing havebeen widely used in the coal industry and mining industry, for its highand unique quality. They can crush coal at large quantity and highefficiency. In addition, Shibang vertical shaft impact crusher can crushcoal into much smaller sizes to meet specific requirements.
Large coal enterprises attach much importance tocrushers’ capacity, quality, maintenance and the cost-effectiveness inthe long term. Shibang crawler type mobile crusher minimizes the equipment downtime and integrates the coal conveying andcrushing, thus greatly reduces the use cost. It is favored by largecoal enterprises, especially coal mine, as it meets their requirementsfor high capacity and efficiency processing of the coal.
Though coal has many usages such as gasification, liquefaction, ethanol production, the major usage is used as fuel and coke. In orderto make full use of coal and reduce the pollution of the environment, after the coal have been mined, people usually crush the larger coalblock to small one by coal crushing plant, use coal mill or coal pulverizer to grind the coal.
Coal Mill for producing slack coal
The particle size of slack coal is 0 ~25 mm. Theslack coal is often used as combustion agent in steel company, thermalpower plant, etc. The consumption of coal is quite large in thermalpower plants. Take a 1 million kW thermal power plant for example, coalconsumption amounts to 11, 000- 13000t a day, which takes 60% ~ 80% ofthe cost for generating electricity. It is advisable to adoptappropriate coal mill for coal grinding. This can not only improve theutilization of coal, but also contribute to energy saving, environmental protection, economic benefits.
According to the market research, vertical coal mill is used most widely. There are also other grinding mills like traditional Raymond mill, roller mill, trapezium mill, etc. can also meet different requirementsfor grinding coal into different sizes and types. Customers can choosean appropriate coal according to their specific needs.
Coal mill
As coal powder is the most important fuel in the power plant, Theplant owners need coal mill or coal pulverize to grind the coal tomicro powders.
Raw coal (crushed) is fed through hopper at the top of the coalpulverizer and falls down to grinder ring to be pressed, crushed andmilled into pieces by rollers. After the first crush, coal powder fallinto the second and third layer. The pumping of the high-pressurecentrifugal blower put the outside air into the coal mill. The coarsecoal powder will be brought into the classifier.
As a pioneer in coal pulverizer, Shibang has positioned itself well to meetthe challenge of supplying coal mill with reliably quality andefficiently at the lowest cost.
Shibang can manufacture and supply coal mill for all grades from hard coal to coke coal, our ball mill, High pressure Raymond mill, MTW trapezium mill, MTM trapezium mill, Coarse powder mill and micro powder mill is an ideal choice for powerplants. The power plant can equipment different kinds coal mill to meetthe required size.
Power plant coal mill Case:
Coal mill plays an important role in the coal-fired power plant. Thepower plant has two types of mills: ball mills and grinding mills.
Ball Mills: A ball mill uses steel balls and crush any coal that is in their way.
grinding Mills: The other type of coal mills are grinding mill.The coal gradually breaks into powder. The outlet of the mill includesa blower that blows the fine powder up to the boiler furnace.
After the coal has grind to micro powder, it will transported toboilers via a round pipe. The crushed coal is conveyed using primarycombustion air into the furnace side of the boiler. The coal powder isfeed into the coal mill through a central inlet pipe where gravity isused to lead the coal to the bottom of the coal mill, where thegrinding table and heavy rollers of coarse powder pulverizers or micropowder grinding mills pulverizes the coal to particles. The air flow isfed through the mill, with the purpose of heating and lift the coalparticles out of the coal mill and into the boiler furnace.
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