What is the working principle of a medium speed coal mill?-Shenyang Boyeqiang Heavy Machinery Equipment Co., Ltd.

What is the working principle of a medium speed coal mill?

Release time:

2021-05-07

The motor drives the grinding disc to rotate through the reducer, and the material falls from the inlet to the center of the mill through the lock air feeder, while the hot air enters the mill from the air inlet.

How it works:
　　
1. The motor drives the mill disc to rotate through the reducer, and the material falls from the feed port to the center of the mill through the lock air feeder, while the hot air enters the mill from the air inlet.
　　
2. With the rotation of the grinding disc, the material moves to the edge of the grinding disc under the action of centrifugal force, and is crushed by the grinding roller when passing through the annular groove on the grinding disc, the crushed material is brought up by the high-speed air flow of the wind ring at the edge of the grinding disc, and the large particles fall directly to the grinding disc to regrind, when the material in the air flow passes through the upper part separator, under the action of the rotating rotor, the coarse powder falls from the cone to the grinding disc to regrind, and the qualified fine powder is milled with the air flow and collected by the dust collection device, that is, the product.
　　
3. The material containing moisture is dried in the contact process with the hot air flow, and by adjusting the hot air temperature, it can meet the requirements of different humidity materials and achieve the required product moisture. By adjusting the separator, the required thickness can be achieved for different products.
　　
Medium speed coal mill
　　
1. Meaning:
　　
Medium speed coal mill refers to the working speed of 50~300r/min coal mill, belongs to the blast furnace ironmaking auxiliary material preparation processing professional equipment, medium speed coal mill can provide a suitable auxiliary material for the blast furnace ironmaking system - pulverized coal.
　　
2. Milling part:
　　
The medium-speed coal mill has two groups of relatively moving milling parts, and the milled parts are squeezed and milled under the action of spring force, hydraulic pressure or other external forces, and finally crushed into pulverized coal; By rotating the milling parts, the crushed pulverized coal is thrown to the wind ring chamber, and the hot air flow through the wind ring chamber brings these coal dust to the pulverized coal separator in the upper part of the medium-speed coal mill, and the overcoarse coal dust is separated and regrinded.
　　
In this process, the hot air is also accompanied by the drying of pulverized coal; During the grinding process, a small amount of stones and iron debris entrained in the raw coal is also thrown into the wind ring chamber, which finally falls into the glove box and is regularly discharged.
　　
As a result of these processes, medium-speed coal mills can provide pulverized coal, an auxiliary material that is ideally suited for blast furnace ironmaking systems. High-quality medium speed coal mill has the characteristics of low metal consumption, low metal wear, low maintenance cost, small power consumption for grinding coal, low working noise, reasonable structure, strong and durable, low price and convenient maintenance.