The current development trend of vertical roller mill has the following points: large-scale grinding machine; development of high-efficiency and energy-saving vertical grinding mill; development of fine grinding and ultra-fine grinding equipment. Due to the large change in the diameter of the mill, the grinding process will also produce two changes. If the diameter of the mill is too large, it will bring some new problems to the production. For example, the rotation speed is reduced, which tends to cause the impact of the steel ball to become smaller, the grinding and stripping effect is large, the contact between the ball and the ore is less, the dead zone of the ball is rapidly increased, the output per unit volume is decreased, and the power consumption of the grinding product is high, so for the vertical grinding, The diameter design cannot exceed the range of two.

At present, the most popular high-efficiency energy-saving vertical grinding machines on the market include central transmission vertical grinding, static and dynamic pressure bearing vertical grinding, conical vertical grinding, super-speed vertical grinding, fine grinding and ultra-fine grinding equipment. The drive of the central drive vertical mill directly drives the cylinder by the planetary gear reducer. The motor, the reducer drive system and the cylinder are located on the same two central axes. The cylinder is supported by the spherical roller bearing, and the hollow diameter of the mill Rolling friction with the main bearing reduces the resistance and saves energy. The static and dynamic pressure bearing vertical grinding adopts static and dynamic pressure bearing. It is lubricated by high pressure hydraulic system during starting. The vertical grinding cylinder is used with high pressure oil. After starting, it is lubricated with low pressure hydraulic system to ensure that the vertical grinding hollow shaft diameter can be in good condition. Lubrication state, reduce frictional resistance, reduce the grinding power consumption of the equipment. In the general case, the main bearing of the conical vertical mill is a spherical roller bearing with low frictional resistance and reduced energy consumption.

If the vertical roller mill can break through the critical speed, the production capacity of the mill will increase, and it will increase with the increase of the mill speed above the critical speed. This will achieve the goal of miniaturization of the mill and large-scale production. It has a very important role in promoting the development of grinding in traditional industries such as mineral processing, chemicals and building materials. The ore and medium flow guiding mechanism in the super-speed vertical grinding cylinder changes the movement track of the medium and ore flow controlled by gravity and centrifugal force in the traditional vertical mill, so that the ore is subjected to high-speed impact and grinding and peeling, so that the conventional vertical grinding Above the critical speed, it can also achieve effective grinding, significantly improving grinding efficiency and speed.