A high-strength heat-insulating and wear-resistant castable for a catalytic cracking unit

Abstract

The invention discloses a high-strength thermal insulation wear-resistant castable for a catalytic cracking device, which comprises the following components in percentage by weight: 25-46% of block perlite with a particle size of 7-1mm, 5-20% of ceramsite with a particle size of 5-1mm, 3-18% of 220-mesh first-class alumina, 4-8% of 220-mesh fused quartz, 3-8% of silica fume, 5-15% of floating beads and 5-30% of CA-65P cement, wherein the total weight percentage of the components is 100%; based on the total weight of the components, 0.1-0.15% of polycarboxylic acid is added, and 10-15% of water is added in construction. The high-strength thermal insulation wear-resistant castable disclosed by the invention has the advantages of high mechanical strength, good wear resistance, low linear change rate and low heat conductivity coefficient, and also has an ultralong service life of 8-9 years and an energy saving effect; moreover, the outer temperature of a shell can be freely adjusted at 80-120 DEG C or 140-170 DEG C by adopting the castable with different heat conductivity coefficients according to the needs of a petrochemical plant.

Description

technical field [0001] The invention relates to a high-strength heat-insulating and wear-resistant pouring material for a catalytic cracking device, which belongs to the field of refractory materials in the discipline of inorganic non-metallic materials. Background technique [0002] The catalytic cracking unit is the most important petroleum processing equipment. The shells of the reactor (settler) and regenerator (referred to as the two units) in the catalytic cracking unit are generally made of double-layer wear-resistant lining of tortoise shell mesh or steel fiber without tortoise shell mesh. Enhanced heat insulation and wear-resistant double-layer lining, the temperature in the reactor is about 550 ℃, and the temperature in the regenerator is about 800 ℃. The heat-insulating and wear-resistant double-layer lining with tortoise shell net is composed of cylindrical anchor nails, end plates, tortoise shell net, heat insulation lining and wear-resistant lining. Bulge or c...

AI Technical Summary

Problems solved by technology

Due to the difference in density and expansion coefficient between the wear-resistant layer and the heat-insulating layer, the wear-resistant layer and the heat-insulating layer are easy to separate and peel off as the number of start-ups and shutdowns increases.

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