High-purity microlite wear-resisting alumina lining and preparation method thereof

Abstract

The invention belongs to the field of alumina ceramics in inorganic non-metal materials, and particularly relates to a high-purity microlite wear-resisting alumina lining plate and a preparation method thereof. The method comprises the steps that the high-purity microlite wear-resisting alumina lining plate is generated by performing the mixing, sanding, spray granulation, modling and sintering onalpha phase alumina A and alpha phase alumina B; pseudo-boehmite, silica sol and industrial alumina are performed with wet-grinding, mixing and refining to obtain fine-particle mixed slurry capable of passing through a 600-mesh screen, and the mixed slurry is performed with pressure filtration, flash evaporation drying and calcination to obtain the alpha phase alumina A; magnesium fluoride, boricacid and high temperature calcined alumina are performed with dry-mixing, ball-milling and refining to obtain fine-particle powder capable of passing through a 180-mesh screen, and the fine-particlepowder is calcined to obtain alpha phase alumina B. The high-purity microlite wear-resisting alumina lining plate and the preparation method thereof have the advantages that the bimodal distribution of grain size is obtained in a microstructure, and a small amount of anisometric crystal exists in the microstructure, thereby improving the hardness and wear resistance of the alumina lining plate; the invention also provides a preparation method of the high-purity microlite wear-resisting alumina lining plate, the process is simple and convenient, the process parameters are controlled easily, andstable mass production can be performed.

Description

technical field [0001] The invention belongs to the field of alumina ceramics among inorganic non-metallic materials, and in particular relates to a high-purity fine-grain wear-resistant alumina liner and a preparation method thereof. Background technique [0002] In the fields of metallurgy, mining, electric power and chemical industry, it is necessary to use conveyor belts to transport hard mineral raw materials. In the past, oily nylon plates or polymer liners were often used to consign materials on conveyor belts, but due to poor wear resistance, material blocking often occurs , the liner needs to be replaced, resulting in increased maintenance costs and reduced efficacy. Subsequently, people used cast iron as the wear-resistant liner. Although the wear resistance has been greatly improved, the problem of wear resistance has not been solved for hard materials. Therefore, the use of high-hardness alumina ceramics as a wear-resistant lining has become an inevitable choice...

AI Technical Summary

Problems solved by technology

However, the patent does not give performance indicators such as fracture toughness, only that the service life of the components is greatly extended

At the same time, carbon fiber is relatively expensive, and sintered dense ceramics such as silicon carbide require higher sintering temperature and pressure, such as hot pressing sintering, which not only increases the manufacturing cost of the liner, but also limits the size and shape of the liner