Vertical roller mill grinding cement technology

International Progress:

International Progress:

In the past 10 years, the vertical roller mill for cement and slag grinding technology has made an important breakthrough.

the world's largest cement producer Ruishi Hao Rui Group in 1998 and Loesche companies, Hon Chong Cement Plant in Vietnam into the first vertical mill for cement grinding. Since then, more and more vertical roller mill for cement and slag in the final grinding.

vertical roller mill for cement producers traditional grinding system compared with the practical and the quality of the cement to produce the same concerns have been eliminated. Vertical mill grinding cement has many advantages, not only has the economic advantage, while versatile, represents the future direction of development of cement industry.

Since the first vertical mill grinding cement in use since the cement grinding process, especially a large cement grinding power consumption and reduce power consumption is also a great potential. Cement and slag grinding, the vertical mill grinding energy is about 50% of the traditional ball.

vertical mill is an air swept mill, so the fan's energy consumption must be included in the grinding system. Generally speaking, the vertical roller mill grinding plant ball mill power consumption is about 70%, which is new on the market to other comparable grinding technology.

Improvements through exploration and discovery, when the cycle of bucket elevator reach the threshold current 140A, even to the alarm value of 150A, to take the following measures, which can effectively avoid the cycle of bucket elevator of death.

trip into the grinding belt, prohibited materials into the vertical roller mill. to quickly lower the ground pressure, so that in the disc of material formed on a temporary thick layers, so that the cycle bucket elevator plummeted materials. appropriate separator to reduce speed, so that in fine grinding as soon as possible from outside the mill (separator speed should not be too low to prevent the raw material through the rough.) When the cycle of current bucket elevator downward trend and dropped to 140A, can reduce the feeding amount to 200 ~ 300t / h, open the feed into the grinding belt, adjust the grind to a steady state condition, then normal operation.

Practice has proved that such methods of operation is simple, rapid decrease in a relatively short period of time outside the volume of recyclable materials to effectively prevent the large amount of recyclable materials caused by circulating outside the bucket elevator crushing, vertical roller mill stop jumping phenomenon long-term operation of the mill has played a crucial role, thus ensuring the normal kiln feed, but also greatly reduces the power consumption of raw material grinding system

Vertical roller mill grinding cement technology

By: sunshine

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