High-temperature wear-resistant coating material and preparation method thereof

Abstract

The invention discloses a high-temperature wear-resistant coating material which comprises 18-25 parts of 3-5mm black corundum, 6-10 parts of 1-3mm black corundum, 6-10 parts of 1-3mm silicon carbide, 15-25 parts of 0-1mm silicon carbide, 10-15 parts of silicon carbide powder, 25-30 parts of mullite powder, 4-8 parts of Gangxi sludge and 8-12 parts of aluminum sulfate solution. The preparation method comprises the following steps: uniformly mixing the black corundum and silicon carbide; adding the aluminum sulfate solution into the mixture, and uniformly mixing; and adding the silicon carbide powder, mullite powder and Gangxi sludge into the mixture, and stirring uniformly. The coating material has the advantages of high adhesion property, high toughness, favorable wear resistance and excellent thermal shock stability, can effectively resist erosion of solid particles and corrosion of flue gas under high-temperature conditions, can effectively lower the heat loss of the furnace wall, and enhances the overall heat efficiency of heat engineering equipment. The high-temperature wear-resistant coating material has better fire resistance, permanent linear change rate, wear resistance and the like than the traditional wear-resistant castable and plastic material. The wear-resistant coating material is simple for laying and convenient for maintenance, and can greatly lower the construction and maintenance cost and enhance the economic benefits.

Description

technical field [0001] The invention relates to a high-temperature wear-resistant smear material and a preparation method thereof. Background technique [0002] Wear-resistant smear is an amorphous refractory material that is applied manually or mechanically to the surface of other refractory materials. It is composed of refractory aggregates and powders with a certain particle size distribution, adding appropriate binders and admixtures (such as coagulants, plasticizers, expansion agents, etc.), and prepared into paste or other liquid binders in proportion. Slurry is applied by smearing. This material has a certain plasticity and is in the form of a paste. Such materials are usually required to have high strength, excellent resistance to melt or gas erosion, good smearability and adhesion to the protected material, good thermal shock resistance and chemical stability, and no cracking during use , No peeling, no chemical reaction with the parent material, etc. Refractory...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a high-temperature wear-resistant smear and its preparation method, which can effectively solve the problems of short service life and poor economy of the existing wear-resistant smear