Refractory castable for lining of thermal equipment and using method of refractory castable

Abstract

The invention relates to a refractory castable for a lining of thermal equipment and a using method of the refractory castable for the lining of the thermal equipment. The invention adopts the technical scheme as follows: the refractory castable consists of an aggregate I, an aggregate II and a matrix, wherein the aggregate I comprises corundum particles, high bauxite particles, corundum-alloy composite particles and high bauxite-alloy composite particles, and has the particle size of 8-15mm; the aggregate II comprises three grades of corundum particles and high bauxite particles with the particle size range being greater than or equal to 1mm and less than 8mm; the matrix comprises corundum fine powder, high bauxite fine powder, rho-Al2O3 micropowder, silicon micropowder and calcium aluminate cement. The using method of the refractory castable for the lining of the thermal equipment comprises the following steps: uniformly mixing polycarboxylic acid and the matrix to obtain premixed matrix; uniformly stirring the aggregate II and the premixed matrix, adding water, and stirring to obtain a slurry; putting the aggregate I into a mould, adding the slurry, performing vibration moulding, and curing. The refractory castable can automatically adjust the temperature, so that the problems of high overtemperature energy consumption of a casing and casing corrosion caused by low-temperature medium enrichment on the casing are solved.

Description

technical field [0001] The invention belongs to the technical field of refractory castables. In particular, it relates to a refractory castable used for thermal equipment lining and its application method. Background technique [0002] Refractory materials are directly used in metallurgy, building materials, petrochemical, electric power high-temperature kilns, pipelines and other thermal equipment. They are the lining materials of these thermal equipment and play an irreplaceable role in ensuring the safe and stable operation of the above industries and economic development. With the rapid development of the economy, resources and energy are also rapidly consumed. The sustainable development of the economy puts forward higher requirements for high-temperature equipment lining refractory materials and their applications: not only the long service life of high-temperature lining materials and the safe operation of high-temperature equipment are required, but also Equipment a...

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to overcome the defects of the prior art, and aims to provide a refractory castable for thermal equipment lining and its application method. It can stabilize the temperature of the equipment shell, thereby solving the problems of high energy consumption due to overheating of the shell and the enrichment and corrosion of the shell material by the low-temperature medium of the shell