Vertical Mill Bimetal Grinding Roller

Abstract

The invention relates to a vertical bimetallic grinding roller. The vertical bimetallic grinding roller comprises a core and an outer hard surface layer, wherein the core and the outer hard surface layer are cast into a whole body in a centrifugal compounding way; the outer hard surface layer is made of high-speed alloy steel which comprises the following components in percentage by weight: 0.7-4.0% of carbon, less than 2% of silicon, less than 2% of manganese, 4-18% of chromium, 0.5-4% of nickel, 3-10% of vanadium, 2-10% of molybdenum, 0.5-7% of niobium, 0-2% of cobalt and 0.5-8% of tungsten. The vertical bimetallic grinding roller is used for the cement industry and the power industry. Because the core and the outer hard surface layer of the vertical bimetallic grinding roller are cast into the whole body in the centrifugal compounding way, the bonding surface of the core and the outer hard surface layer is a metallurgical bonding surface, the toughness and the strength of the vertical bimetallic grinding roller can be improved greatly, and the service life can be prolonged by 2-3 times; and the vertical bimetallic grinding roller is easy to process and form, can be repaired and reused after being worn and has low cost.

Description

technical field [0001] The invention belongs to a grinding device, in particular to a vertical mill bimetal grinding roller used in the cement and electric power industries. Background technique [0002] Grinding rollers are widely used in many industries that require crushing, such as coal, cement and electric power industries. During use, the roller body and the wear-resistant liner of the vertical mill, due to the rolling pressure of the roller, the reaction force of the material, the friction resistance between the material and the liner of the roller, and the grinding angle of the material, cause the shearing of the roller. Stress, the hydraulic system pressure of the roller mill and the apparent compressive stress of the vertical mill all act on the effective rolling area of ​​the vertical mill roller. Under the combined action of these forces, once a fit gap occurs, the body and the liner will Impact and collision will occur, which will intensify the wear between the...

AI Technical Summary

Problems solved by technology

During use, the roller body and the wear-resistant liner of the vertical mill, due to the rolling pressure of the roller, the reaction force of the material, the friction resistance between the material and the liner of the roller, and the grinding angle of the material, cause the shearing of the roller. Stress, the hydraulic system pressure of the roller mill and the apparent compressive stress of the vertical mill all act on the effective rolling area of ​​the vertical mill roller. Under the combined action of these forces, once a fit gap occurs, the body and the liner will Impact and collision will occur, which will intensify the wear between the body and the liner. In severe cases, the liner will crack or even break, causing the liner to fall off, damage the machine, especially the damage of the reducer, and cause a vicious incident.

Once this type of problem occurs, it is difficult to solve the general repair method. Disassembly, welding repair, and machining are time-consuming and labor-intensive, which greatly prolongs the shutdown time of the machine and brings economic losses to the enterprise.

However, the grinding roller provided by the above-mentioned patent technology has only been improved structurally, and its effect of reducing wear is poor.