Cement mill grinding process

In the process of cement production, most of the raw materials are crushed, such as limestone, clay, iron ore and coal. Limestone is the most used raw material for cement production. After mining, the particle size is large and the hardness is high. Therefore, the crushing of limestone plays an important role in the crushing of materials in cement plants.

The pre-homogenization technology is to use the scientific stacking and reclaiming technology to realize the preliminary homogenization of the raw materials in the process of storage and retrieval of raw materials, so that the raw material yard has the functions of storage and homogenization at the same time. Reasonable selection of grinding equipment and process flow, optimization of process parameters, correct operation, and control of operation system are of great significance to ensuring product quality and reducing energy consumption.

Cement grinding is the final process of cement manufacturing, and it is also the process that consumes the most electricity. Its main function is to grind cement clinker (and gelling agent, performance-adjusting material, etc.) to a suitable particle size (represented by fineness, specific surface area, etc.) to form a certain particle gradation and increase its hydration area. Accelerates the hydration speed and meets the requirements of cement paste coagulation and hardening.

Since the vertical mill is a material bed grinding, the key to the stable operation of the vertical mill is to form a stable material layer. There are many reasons for the large vibration and frequent vibration of the vertical mill. Therefore, during operation, the operating parameters should be adjusted in time according to the material conditions, laboratory data and the operation of the mill. By observing the outlet temperature of the mill and the pressure difference inside the mill , material layer thickness, vibration value, main motor current, external circulation and other comprehensive judgment and analysis of the mill state, dynamic adjustment according to the situation, to ensure that the mill is always in a stable state, to achieve the purpose of high production and energy saving.