Great Wall News

Development of vertical mills in the cement production industry

2020-08-19 11:17:35

 Compared with the ball mill in the cement industry, the vertical mill has the following advantages: simple process, strong adaptability of raw materials, convenient maintenance, and more environmental protection and energy saving. Internationally, the cement engineering industry has a high acceptance of vertical mills.

vertical roller mill

In raw meal grinding and coal grinding, vertical grinding mill is basically used; in cement clinker grinding, vertical grinding is mostly used.

Vertical roller Mill Process Features:

Compared with the ball mill grinding system:

(1) Grinding, drying and classification are completed at the same time. There is no need to set a separate powder separator, so the system process is simple. Small footprint, saving infrastructure investment;

(2) Use hot exhaust gas to dry the material during the grinding process, saving energy;

(3) The power consumption per unit grinding is reduced by 35-40%, and the unit metal wear is only 1/10 ~ 1/20 of the ball grinding;

(4) Strong adaptability, can grind brittle materials with high moisture and various hardness;

(5) Adaptation to large-scale needs: throughput: 3000 ~ 4000tph

Compared with the high-pressure roller grinding system:

(1) Grinding, drying and classification are completed at the same time. There is no need to set a separate powder separator, so the system process is simple. Small footprint, saving infrastructure investment;

(2) Both belong to the principle of material layer grinding, and the unit power consumption is equivalent;

(3) The vertical mill can grind brittle materials with high moisture and various hardness;

(4) Adapt to large-scale needs: throughput: 3000 ~ 4000tph;

(5) The individual parts are small and convenient for maintenance and transportation.

A large number of vertical mill final grinding production lines have been put into operation at home and abroad, and cement vertical mill has been agreed. New practice proves that the sphericity of vertical cement grinding mill is better; vertical roller mill can achieve ultra-fine grinding, which breaks the limitation of general grinding fineness of traditional vertical grinding; vertical grinding can achieve multiple uses for one machine, and is the first choice for separate grinding Technology; traditional view: the vertical mill cannot grind cement, the particle size is too narrow, the sphericity is not good, and the water demand is too high. With the development of technology and knowledge, it has been highly recognized.

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