How Does Coal Mill Accomplish Work by Itself?

This coal mill is widely used in cement, building material, thermal power generation, metallurgical industry, and chemical industry, etc. Air-swept coal mill is of reasonable structure and high efficiency, which is ideal equipment to pulverize coal. Hence the air swept coal mill is more and more popular in mining market at present, but have you known how this type coal mill finish work?

first of all we say why you want to be grinding coal thermal power plants : thermal power plants need coal with coal mill will grind fine coal particles are irregular , the particle average 0.05-0.01mm, in which the particles 20-50um ( micron ) following the majority. This is because the coal particles is small , a large surface can absorb a lot of air , and has the general properties of solids No – mobility. Pulverized coal particle size by air swept coal mill , the smaller the moisture content , the better their mobility , but the pulverized coal particles too small to tiny or too dry, pulverized gravity phenomenon is so unstable operating characteristics to coal , to adjusted operating boiler operation difficult.

Working process of coal mill is as follows: The raw coal enters the mill via a feed screw and is discharged onto the rotating grinding table. The rotation of the table accelerates the flow of material towards the grinding track, where the coal is ground between the table and the three rollers. The coal then continues over the dam ring and is entrained in the hot drying air that enters the mill house through the nozzle ring. The air lifts the coarser particles back onto the grinding table and sweeps the finer particles up into the separator. When the final product leaves the mill with the air, it goes to a cyclone or bag filter, where it is collected.

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