Air-Swept Coal mill, also named as coal grinding mill, is used to grind and dry coal with various hardnesses; Coal powder kiln is mainly composed of feeding device, main bearing, rotating part, gear, discharging equipment, high-voltage start-up device and lubrication system. Coal mill is widely used in industries including cement, power generation, metallurgy industry, chemical industry, etc., with reasonable structure and high grinding efficiency; it is the ideal equipment for coal preparation.
Air-swept coal Mill is the main equipment of cement plant and used for drying and grinding raw materials or coal pulverized. It is made up of the feed device, main bearing, rotary part,driving device,discharge device, high pressure starting device and lubricating system. The coal mill features ratiures rational structure and high grinding efficieney, It is an ideal equipment for raw materials or pulverized coal preparation.
Air swept coal Mill grinds material by rotating a cylinder with steel grinding balls, causing the balls to fall back into the cylinder and onto the material to be ground. The rotation is usually between 4 to 20 revolutions per minute, depending upon the diameter of the mill. The larger the diameter, the slower the rotation. If the peripheral speed of the mill is too great, it begins to act like a centrifuge and the balls do not fall back, but stay on the perimeter of the mill. The point where the mill becomes a centrifuge is called the 'Critical Speed', and ball mills usually operate at 65% to 75% of the critical speed.
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