Vertical Coal Mill

Process introduction

Vertical coal mill, also known as vertical roller coal mill or vertical coal grinding mill, is a mechanical equipment for crushing and grinding coal into coal power. Mainly used for grinding raw coal, bituminous coal, and other fuels into coal powder, which is supplied to rotary kiln and other kilns in the cement plant and thermal power plant. It is an important auxiliary equipment for pulverized coal furnaces, rotary kilns and other kilns which need pulverized coal as fuel. GRMC coal vertical mill adopts special structure design and production technology, the production process has less dust and low noise, and the produced coal powder has excellent combustion performance.

1. The raw coal is screened from the raw coal storage yard and then dropped onto the belt conveyor through the grid screen. After the iron is removed by the electromagnetic iron separator, the belt conveyor sends the raw coal into the original coal bin for storage.

2. After the pulverizing system has been started, open the rod valve at the bottom of the original coal bin, and start the sealed measuring adhesive taped coal feeder, and then the raw coal enters into the coal vertical mill for drying and grinding.

3. The hot air from the hot stove or waste gas of cement production line are exhausted into coal vertical mill by fans, exchange heat with raw coal in mill, and then take pulverized coal up to separator for separating. Substandard coarse pulverized coal falls down to grinding table for regrinding, and qualified pulverized coal enters into pulse dust collector of explosion proof air box along with gas flow, and is discharged into pulverized coal bin through a grid wheel.

4. Impurities in raw coal, such as parts of coal gangue, metal blocks, etc., are discharged out of the mill through the wind ring and slag discharge port.