Coal Mill (Air Swept Coal Mill) is an ideal coal processing equipment that can both grind and dry, with characteristics of high efficiency, energy saving, environmental protection. 8% and above of its grinding coal can pass through the 200 mesh screen, and the water content can be under 2%

The raw coal is fed into the feeding chute of the coal mill. When the raw coal slides down, the hot air with a temperature of about 300 ℃ also enters the coal mill through the hot air pipe to dry the raw coal. Then the raw coal enters the cylinder bin through the feeding spiral cylinder, which a certain proportion of the grinding body is installed in. With the rotation of the mill cylinder, the liner plate brings the grinding body to a certain height. The raw coal is crushed and grinded by the impact and friction force during its falling. Then the grinded fine powder and the used hot air are drawn out of the mill cylinder bin by the special induced draft fan at the outlet. The mixture of the fine powder and the hot air is loaded and selected by the special separator. The unqualified coarse powder is returned to the mill for the second grinding.

Main structural features:

1.Feeding unit is composed of the feeding chute with an angle of 45 ° from the horizontal direction, the horizontal  hot air inlet and the bracket. The removable lining plate is installed in the feeding chute, prolonging the life of the chute. And the sealing device is installed on the feeding unit, effectively reducing the air leakage rate. 

2. A gap is left at the feeding hollow shaft , which reduces the error caused by the installation and expansion of the temperature difference of the cylinder and ensures the accurate engagement of the gears.

3. The unique streamline design is adopted at the end cover and outlet. it reduces the ventilation resistances, increases the effective volume of the cylinder, facilitates the discharge of pulverized coal  and improves the capacity of the mill.

4. The rock wool insulation cover on the mill cylinder effectively reduces the heat loss and improves the heat utilization rate of hot air. Meanwhile, the cover plays a soundproof  role, reducing the noise generated in the grinding process of the grinding body.

5. The main bearing adopts the sliding bearing, which has good strength, plasticity, polymerization, antifriction, wear resistance, lubricity and diathermancy. Moreover, it is easy to maintain, simple in structure, small in floor area, and does not need to be equipped with a thin oil station, which can meet the working environment of low speed, heavy load and much dust of the coal mill.

 ZK CORP is a professional machinery and equipment manufacturer, with complete types and specifications. Over the years, the equipment is not only popular in China, but also exported to many countries and regions. The products have received good reputation from customers. If you want to know more equipment information, welcome to visit our factory!