Vertical Roller Mill Used In Cement Industry

In the cement industry, vertical roller mill is used as cement mill for cement production.

Traditionally, plants used ball mills to grind clinker and gypsum into cement. The result: the majority (60%) of finish grinding in the world is still performed using the ubiquitous ball mill. Ball mills are cylindrical steel shells with steel liners. These rotating drums contain grinding media that tumble inside the cylinder. The grinding balls cascade and tumble onto the clinker and gypsum to produce cement. Almost all ball mills use a form of closed circuit grinding that returns material that is too coarse back to the ball mill inlet while material fine enough to meet product requirements is collected. The separator or classifier determines which particles will be returned and which particles are sufficiently fine. With an effort to increase production, ball mill physical size has increased almost to the physical limitation dictated by the gas velocities and accompanying pressures necessary for the process. Ball mills may not be the most efficient means of size reduction but their reputation for product consistency and their simplicity of operation have made them an historic plant favorite.

SBM Vertical roller mill for cement industry

Since the 1980"s, cement plants are increasingly looking to vertical roller mill technology for their finish grinding needs. Vertical roller mills present a compact and efficient grinding method. Clinker and gypsum is ground on a rotating table that passes under large rollers. Material is forced off the table by centrifugal force, where it is then swept up into an airstream to a classifier immediately above. Just as with a ball mill, material that is too coarse is returned to the table for additional grinding while material that is fine enough is collected as product. The compact design of a vertical roller mill allows it to dry, grind, and classify, all within one piece of equipment and all in a relatively compact space. Vertical roller mill technology allows: (1) power consumption savings; (2) consistent product quality and (3) process simplification.

Cement industry

Cement industry in India is currently going through a technological change as a lot of upgradation and assimilation is taking place. Currently, almost 93% of the total capacity is based entirely on the modern dry process, which is considered as more environment-friendly. Only the rest 7% uses old wet and semi-dry process technology. There is also a huge scope of waste heat recovery in the cement plants, which lead to reduction in the emission level and hence improves the environment.

SBM is a leading manufacturer of cement and construction machine in China, has high quality laboratories and testing units where the cement producing process goes through rigorous examination and quality control techniques. Through the testing process, it is ensured that the clinker and the cement that is produced are of the best quality according to the international standards. All the cement plants of the company have high standard laboratories which comply with the standards set by the ASTM and Euro. All the plants have been provided with the prestigious ISO 9001 certifications and 14001 certifications for the purpose of environment management.

by: yoncy

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