Alumina hollow ball high-viscosity light refractory coating

Abstract

The invention relates to a light coating for repairing a high temperature furnace and in particular relates to an alumina hollow ball high-viscosity light refractory coating. The alumina hollow ball high-viscosity light refractory coating is prepared from the following raw materials: 40-50 percent of alumina hollow ball, 5-15 percent of white corundum powder, 10-20 percent of alumina micro powder, 10-20 percent of pure calcium aluminate cement, 5-15 percent of aluminum dihydrogen phosphate solution with the concentration of 20-40 percent. The alumina hollow ball high-viscosity light refractory coating has the characteristic of high viscosity, is high in adhesion, can be rapidly combined with the original furnace lining when being coated at a crack or a pit, is short in maintenance time and can be rapidly roasted and used. After being subjected to high-temperature heat treatment, the coating can be sintered with an old lining together, the coating is high in strength, high in thermal shock resistance, difficult to crack and good in repair effect, the heat insulation effect of the alumina hollow ball lining in the high temperature furnace can be effectively improved, and the service life of the alumina hollow ball lining is prolonged.

Description

technical field [0001] The invention relates to a light-weight smear for repairing high-temperature kilns, in particular to an aluminum oxide hollow spherical high-viscosity light-weight refractory smear. Background technique [0002] Alumina hollow spherical bricks are often used as working linings for high-temperature kiln linings to achieve high temperature resistance and thermal insulation effects, but they are expensive and require a lot of investment in one-time and maintenance replacement. Alumina hollow ball bricks are lightweight refractory materials, and their thermal shock and strength are not as good as dense refractory materials. Therefore, during use, alumina hollow ball refractory linings often crack and fall due to thermal shock or external impact, resulting in kiln failure. The heat preservation effect is reduced, which affects the firing effect of the kiln. Contents of the invention [0003] In order to solve the above technical problems, the present inv...

AI Technical Summary

Problems solved by technology

[0002] Alumina hollow spherical bricks are often used as working linings for high-temperature kiln linings to achieve high temperature resistance and thermal insulation effects, but they are expensive and require a lot of investment in one-time and maintenance replacement.

Alumina hollow ball bricks are lightweight refractory materials, and their thermal shock and strength are not as good as dense refractory materials. Therefore, during use, alumina hollow ball refractory linings often crack and fall due to thermal shock or external impact, resulting in kiln failure. The heat preservation effect is reduced, which affects the firing effect of the kiln