Cement raw materials commonly used in production are mainly calcareous raw materials, clayey raw materials and a small amount of correction raw materials mixed in proportion.These raw materials can be processed into high-quality cement by dry or wet method, which can be used in civil construction, water conservancy, national defense and other projects. However, no matter which processing method, the processing of cement raw meal is unchanged.From the perspective of environmental protection, energy conservation and emission reduction, many enterprises use slag as raw material for cement grinding station. An important feature of slag is uneven particle size and different hardness. In addition, the processing demand of cement grinding station is very large. vertical roller mill hydraulic system is gradually popular in the industry.