High speed grinding coal dusting machine
There is a common flat grinding, grinding, grinding bowl type and E type roller mill. Speed of 1500 ~ 500 rpm / min, more types. Their common feature is composed of two parts of the mill grinding group relative motion. The coal was crushed in the two groups of surface milling and grinding and squeezed between. At the same time, the coal mill hot coal drying, and coal grinding area in the upper part of the separator to. After separation, a certain size of pulverized coal with air with pulverized coal grinding, coarse grinding area back grinding.
Medium speed coal powder machine
Mainly consists of high speed rotor and the shell, the rotating speed is 50 ~ 300 revolutions per minute. Common fan grinding and hammer grinding, etc.. In the fan mill and the mill shell coal by high speed impact collision of high speed rotor, and the crushed coal mutual impact. The coal mill and pulverized coal separator to form a whole, has the advantages of simple structure, compact structure, initial investment, especially suitable for the grinding of High Moisture Lignite and high volatile bituminous coal, easy grinding. Fan mill due to wear, the continuous running time than other mills are short, not suitable for the grinding of hard coal. With a compact, small footprint, low electricity consumption of pulverizer (about ball mill from 50 to 75%), low noise, light sensitive operation control and other significant advantages; but the structure and manufacture is complex, the cost is large, and is not suitable for the grinding of hard coal. In large capacity coal fired boiler bowl type pulverizer is used more.
Low speed coal grinding powder spraying machine
Is currently more popular mining equipment. Mainly for the roller type ball mill, the roller speed is 15 ~ 25 RPM / min. Generally referred to as ball mill or ball mill. It is a rotating cylindrical or both ends of the drum with a cone, the drum is equipped with steel balls. When the ball barrel continues to impact and compression of coal, coal will be made into coal. The coal is dried by the hot air in the drum and sent out through the separator. After the separation of the separator, a certain particle size of the pulverized coal is fed into the pulverized coal bin or directly fed into the pulverized coal burner. Ball mill, bulky high power consumption, large noise; but for coal adapt to a wide range of reliable operation, especially suitable for the grinding of hard coal