What is the comparison between a vertical mill and a ball mill?

Due to the structure and operating principle of the ball mill, the grinding efficiency of the ball mill is lower and the energy consumption is higher than that of the vertical mill under the same power. The grinding power consumption of the vertical mill is only 50%-60% of that of the ball mill.

Since the vertical mill generates a lot of heat when grinding materials, and this heat will have a certain drying effect, the moisture content of the materials in the vertical mill can be 10%, even more than 6% in the Raymond mill. To dry materials in a ball mill, an external heating device is required to pass in hot air to dry the materials, which not only increases the cost, but also increases energy consumption.

Because the vertical mill uses a hydraulic cylinder to increase the grinding force, the grinding force is larger, so the particle size of the grinding material can reach 5% of the diameter of the grinding roller, so large and medium-sized vertical mills can save secondary crushing.

Because the vertical mill uses a hydraulic cylinder to increase the grinding force, the grinding force is larger, so the particle size of the grinding material can reach 5% of the diameter of the grinding roller, so large and medium-sized vertical mills can omit secondary crushing.

The residence time of materials in the vertical mill is 2-3 minutes, while the ball mill takes 15-20 minutes. Therefore, when grinding materials with a vertical mill, the chemical composition of the product can be quickly measured and corrected, so the fluctuation of the product composition is small, which is beneficial to Homogenization, the vertical mill relies on gas to transport materials, and qualified products can be separated in time to avoid over-grinding. The uniformity of products is conducive to calcination, so the control of the vertical mill is more convenient.

Due to the simple process of the vertical mill, the five processes of crushing, drying, grinding, powder selection and transportation are integrated into one. The process flow is simple, the layout is compact, the building area is small, and the floor area is about 50%-70% of the ball mill system. It occupies a small space, and the construction space is 50%-60% of the ball mill.

Since the grinding roller and the grinding disc lining of the vertical mill are not in direct contact during operation, there is no metallic sound of the steel balls colliding with each other and the steel balls hitting the lining in the ball mill, so the noise is naturally much smaller.