Vertical mill is the main milling machine used in cement grinding plant, with large capacity, energy consumption and it's fineness is upto 0.0445mm. In the complete cement production line, vertical roller mill is used in three grinding processes.
The first process is making cement raw meal. When the limestone particles are mixed with additive materials according to the certain percentage, the cement raw meal will enter into the vertical cement mill for grinding powder, then collect the cement raw meal powder using dust collection.
The secondary process is making coal powder. Coal is the important raw material for cement production line, it can change the clotting time of cement. So we need add coal powder into the cement. We usually use vertical coal mill as cement mill in coal grinding process.
The third process is grinding gypsum and cement clinker into cement powder. Of course gypsum is firstly crushed into particles by crusher. Then gypsum and cement clinker enter into vertical cement mill, the machine grind cement clinker and gypsum into powder to make cement.
Vertical mill is specially used for portland cement, slag and blended cements with 20-50% less energy use than ball mill systems. It features High productivity with stable, reliable operation, Easy maintenance, low maintenance costs, Effective drying when grinding blast furnace slag or blended cements with wet components, Consistent cement quality with easy-to-adjust quality parameters,Long lifetime, Simple, compact layout.
Of course, not only vertical mill is used in the cement production line, ball mill is also used in those three process. Super ultrafine grinding mill is used in the cement plant if the requirement about finess is strict and high.
Cement crusher is general used before the cement mill, and it is used crushing limestone, gypsum and coal for cement.
SBM is a famous cement mill manufacturer in China, and supplies very good machines for cement grinding plant in China and other countries such as India, USA etc. However SBM not only supplies grinding mills for cement industry, but also supplies all types of mining equipments such as stone crushers and grinding mills for stone quarry, stone grinding, and other mining industries.