Grinding trends in the cement industry:

      The main trends concerning grinding processes in the cement industry are still higher efficiency, reduction of the power consumption and system simplicity. In the case of new orders, vertical mills have increased their share to over 60 % and ball mills have fallen to less than 30 %. It is somewhat surprising that the number of different grinding processes and mill types used by the industry have increased rather than decreased. The throughput capacities of the employed mills have risen, but in some cases this has brought machines, e.g. gear units, to the limit of their capabilities. In the cement industry, the use of separate grinding plants is currently showing a two-digit annual growth rate. The number of mill vendors has also increased and the competitive pressure has intensified.

　　In the raw material and coal grinding sectors, vertical mills have maintained their high market shares of 89 –90 % and have improved to almost 40 % in clinker/cement grinding applications.

　　The advantages of cement vertical mill:

　　1. Technique and technology is mature and stable

　　Great Wall Company's GRMK series Vertical cement mill in the production of cement specific surface area up to 3800 cm²/ g with stable and reliable quality, it already have been the ability completely to replace tube mill.

　　2. Reducing the power consumption of cement clinker preparation effectively

　　According to the display of pulverized coal measured data, it can be saving electricity above 30% use of vertical roller mill production per ton cement clinker than traditional tube mill, and the power saving effect is very remarkable.

　　3. Stable, high-efficiency and environmental protection

　　There is a low vibration and noise in overall system, and equipment with whole sealing, system working under negative pressure with no dust overflow, clean environment. Therefore, cement vertical roller mill meets the national environmental protection requirements. With working mechanism changing, cement vertical roller mill can be reduced friction and improved service life.