Coal processing is necessary in coal usage and supplying right size coal ores for coal industry. Coal processing is also the important coal mining equipment which process coal with crushing, grinding, conveying and screening, etc.

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Coal processing is as follows: After coal comes out of the ground, it typically goes on a conveyor belt to a preparation plant that is located at the mining site. The plant cleans and processes coal to remove dirt, rock, ash, sulfur, increasing the heating value of the coal. During this coal processing, the used industrial equipment can be called coal processing equipments.

Coal processing equipment

Coal processing equipment: coal crusher and coal mill, coal vertical mill. Coal crusher can be named coal processing crusher, and coal mill also named coal processing mill used widely in coal processing production lines.

Coal crusher is widely used in the coal crushing process. As technology developed, now we have many types of coal crushers, including jaw crusher, cone crusher, impact crusher and portable crushing and screening plant. SBM supply a whole set of coal crushing production line to coal processing industry.

Coal mill is the most important coal processing plant as coal is usually fed into fire power plant to generate energy. Coal mill include ball mill, vertical mill, raymond mill etc. SBM vertical coal mill is the one we designed for coal pulverizing and is featured with high capacity, high efficiency and long service time. Ball mill, hammer mill and other coal grinding equipments are also widely used in coal processing.

Coal screening plant is one kind of coal selecting and purifying equipments. Coal screening plant helps to separate the right size coal granules we need from those not passable. SBM vibrating screen is welcomed during coal crushing and coal grinding process.

Coal belt conveyor acts as the transporting part and joint in coal processing production line and so it is necessary during coal processing. SBM coal belt conveyor is rubber belt conveyor and runs in the circumstance temperature range from -20? to +40?. SBM coal belt conveyor can work with both outdoor and downhole operation.

Coal crushing and screening plant is the whole set of coal processing production line, equipped with coal crusher, screening plant, belt conveyor and vibrating feeder. Coal crushing and screening plant is more flexible and more widely used than stationary coal crushers.

Coal processing plant

Coal processing plant is the industrial equipments used for processing coal materials in coal mining industry. Coal processing plant mainly inlcudes coal crusher, coal mill, coal feeders, coal conveyors etc. Usually, coal jaw crusher is taken as primary crushing equipment or crusher machine for first crushing stage. Cone crusher and impact crusher are used as secondary crusher equipments. After crushing process, we apply coal mill such as ball mill, raymond mill, vertical mill as grinding machines or equipments for next grinding process.

In order to use coal more rationally, efficiently and effectively, the coal need to be processed and crushed into different sizes, 0 ~ 25 mm particle size for coal gas stove, 25 ~ 8 mm for steam locomotive, 25 ~ 6 mm for the industrial furnace, and coal power plant requires grain coal of 0 ~ 25mm. So coal processing in coal preparation plant includes coal crushing and coal milling.

Coal preperation plant

A coal preperation plant, nestled among the mountains. Coal Preperation plants generally use gravity process equipment to separate the refuse from the product (coal). Coal has a specific gravity between 1.35 and 1.5, while the refuse rock has a Specific Gravity of 2.1 to 2.3. Heavy Media is the most popular method of cleaning coarse sizes, jig plants are probably the second most common method used for coarse coal. Heavy media cyclones are being used more often for fines size fractions. Flotation is generally used to clean the -28 mesh size fraction, although spirals and heavy media cyclones have shown success in cleaning down to 100 mesh coal feed. Spirals are generally used for middling sizes ( 10 mesh to 60 mesh).

A flow diagram of a 400 ton per hour coal plant that produces both metallurgical coal and steam coal for power generation. Generally speaking, metallurgical coal is cleaner , has higher carbon content and is easier to process than the lower rank steam coals.

At this prep plant, all feed coal (ROM) is crushed to -2″ before entering the plant circuits. The 2″ x 10 mesh coal is screened and goes to the primary dense medium cyclone circuit. The 2″ x 10 mesh coking coal is recovered from the refuse here. The middlings (-10 mesh x 60 mesh) are processed in the Secondary Dense Medium Cyclone Circuit to recover the coal here, this produces a higher ash coal and is used as steam coal. The coking coal product conveyor has an intermediate screen that enables material to be diverted in varying proportions to steam coal if necessary to enhance the coking properties.

The -10 mesh coal is deslimed at 100 mesh and then sized at 10 mesh x 100 mesh is processed in the spiral circuit to produce coking coal. The -100 mesh slimes and -60 mesh coal is then processed in the flotation circuit to produce coking coal.