It is known to all that Coal mill is an important auxiliary equipment for coal-powder furnace, and it has three methods to crush the coal lump and grind them into powder，like crushing, impacting and grinding. Air swept coal mill is the main equipment in cement plant for both drying and grinding of the powders. Compared with the ordinary ball mill, it has advantages of higher capacity, more convenient operation, safer usage, and more reliable performance.
The raw coal enters the mill via an airtight feed screw and is discharged onto the centre of 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 to the separator that lets the ﬁnal product proceed to the mill outlet while returning the coarse fraction to the table for further grinding. Having left the mill at the top, the ﬁnal product continues with the air to a cyclone or a bag ﬁlter where it is collected.
Of course, maybe my summary is not comprehensive. And we also have other mining machines, such as jaw crusher, ball mill sand maker and so on. If you have other supplement, you can comment about my article. We learn from each other, and make progress together. Thank you very much for reading my article. I hope you like it.
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