Roller grinding device capable of stabilizing material layer and improving grinding effect of fine particles

Abstract

The invention discloses a roller grinding device capable of stabilizing a material layer and improving a grinding effect of fine particles and relates to a grinding process and a grinding device which are suitable for grinding micro powder substances, cement clinker and other particles. Materials enter a grinding disk 02 through a discharge pipe of the roller grinding device and are dried by hot air of an air chamber 03, and the ground micro powder is carried into a powder concentrator 01 and is sorted so as to obtain finished products of which the specific surface area is 450m<2> / kg; the materials are pre-compacted and distributed by material stabilizing rollers 04 with design of small-inclination angle roller surfaces to ensure that air is discharged, and a firm wedge shape is formed; grinding rollers 05 stably roll and crush the materials to ensure that the materials are thinned; the thinned materials are crushed by the grinding rollers and then staggered, and then are distributed by the material stabilization rollers again so as to form a wedge shape; the materials are distributed and ground by the material stabilizing rollers and the grinding rollers alternately to ensure that the materials can achieve the required fineness; and due to the design of the small-inclination angle roller surfaces, the key function of stabilizing the material layer is exerted, the sliding and blockage effects and vibration can be prevented by the roller arranging scheme with refined functions, the function of the device is enhanced, the vibration in a running process is reduced, the powder fineness can be controlled reliably, and the grinding efficiency can be improved simultaneously.

Description

technical field [0001] The invention relates to a roller mill device for stabilizing the material layer and strengthening the grinding effect in the process of vertical roller mill grinding such as slag (or similar substances) and cement clinker produced by iron and steel smelting. The vertical roller mill using this device degasses and condenses the material layer forcibly in the process of grinding fine particles to form a stable wedge-shaped material layer, so as to give full play to the grinding effect on the material, not only improving the fineness of the ground product It also reduces energy consumption, improves efficiency, and enhances the reliability of system operation. The method can be widely applied to industries such as building materials, iron and steel, metallurgy, etc. For example, it is used to grind slag and similar substances in the iron and steel industry, and belongs to the field of high-tech transformation of traditional industries. Background techniq...

AI Technical Summary

Problems solved by technology

Therefore, under the condition of wind sweeping, due to the strong gasification of the material bed and the suction of the system, the fine particles in it have a great upward force, so that the ordinary vertical roller mill cannot completely and effectively intercept a large number of particle groups, and in addition The kneading action produced by the tilting motion of ordinary grinding rollers makes the material layer distribution more uneven, which easily causes the grinding rollers to slip

On the other hand, the physical properties of the gasified fine powder are like liquid, the internal friction and the friction between the contact surfaces are very small, the flow speed is fast, the material bed is very thin, and it will bypass the grinding roller, and only part of the material The flow enters the gap between the grinding roller and the grinding plate, making the operation unstable

These phenomena will lead to the vicious consequences of the sinking-sliding-vibration of the grinding roller, resulting in a decrease in energy utilization (the power consumption of the ordinary roller mill system is about 45kWh / t when grinding high-fineness slag)

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