Low-cost repairable HP type ceramic composite grinding roller and manufacturing method

Abstract

The invention discloses a low-cost repairable HP type ceramic composite grinding roller and a manufacturing method. The grinding roller comprises a base body, a work layer and a positioning part; the work layer is assembled on the base body, one end of the work layer is limited through a limiting ring on the base body, the other end of the work layer is connected with the positioning part through a positioning groove, the joint position of the positioning part and the base body is welded and fixed, bosses which are arranged at intervals are arranged on the inner side face of the work layer, and a taper is arranged on the outer surface of the matching position of the base body and the work layer. According to the low-cost repairable HP type ceramic composite grinding roller and the manufacturing method, the high-wear-resisting composite grinding roller is prepared, the longer service life is achieved, meanwhile, the reparability is achieved, after wear, the base body is basically kept, the work layer is directly replaced, the grinding roller manufacturing method is simple, the machining period is short, and the cost is effectively reduced.

Description

technical field [0001] The invention relates to the field of new materials, in particular to a low-cost, repairable HP type ceramic composite grinding roller and a manufacturing method. Background technique [0002] In many fields of industrial production, such as coal-fired power plants, cement, steel, mines and other fields, there are harsh working environments, and the working parts are required to have comprehensive properties of wear resistance, heat resistance or wear resistance and impact resistance. Therefore, materials with a single performance have been used. Therefore, various ceramic particle reinforced iron-based wear-resistant materials have received more and more attention from researchers. As the main functional part of the coal mill, the grinding roller has extremely harsh working conditions, so its quality not only affects the quality of coal grinding, but also affects the production cost and efficiency. China has also made great progress in the research an...

AI Technical Summary

Problems solved by technology

High chromium cast iron grinding rollers are simple to manufacture and low in production cost, but have poor impact toughness and short service life and cannot be repaired; while surfacing welding grinding rollers have certain repairability, but they can only be repaired 2-3 times, which has great potential. In the process of use, the surfacing layer is easy to fall off, easy to wear, and has a short service life. It needs to be shut down for maintenance every 1-2 years, resulting in high cost; one-time casting of ceramic composite grinding rollers can greatly improve the wear resistance of grinding rollers The durability and service life are 2-3 times that of high chromium cast iron, but it is not repairable, and during the preparation process, due to the scattering of ceramics, subsequent processing will be difficult, increasing processing costs and production cycles

[0003] Based on the above problems, this patent provides a low-cost, repairable HP-type ceramic composite grinding roller manufacturing method, which aims to achieve high wear resistance and repairability of the grinding roller under the harsh working conditions of the coal mill, and solve the problem of coal mill During the production process, the grinding roller is easily damaged and difficult to replace

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