Refractory brick for boiler

Abstract

The invention discloses a refractory brick for a boiler. The refractory brick is prepared from, by weight, 35-48 parts of mullite powder, 25-35 parts of quartz sand, 10-15 parts of clay powder, 5-8 parts of sillimanite, 5-8 parts of zirconium dioxide, 5-10 parts of ceramic powder and 3-8 parts of floating beads. The refractory brick is high in high temperature resistance, high in endurance strength at high temperature, and high in corrosion resistance and heat insulation performance.

Description

technical field [0001] The invention relates to a refractory brick, especially a refractory brick for a boiler. Background technique [0002] The refractory bricks used in industrial boilers are usually clay bricks, which can withstand high temperatures of 1750°C. However, the hardness, corrosion resistance and thermal insulation performance of clay bricks currently on the market are not good enough, which will cause safety hazards and energy loss. Contents of the invention [0003] Aiming at the deficiencies in the prior art, the present invention provides a refractory brick for boilers, the composition of which is as follows by weight percentage: mullite powder: 35-48 parts; quartz sand: 25-35 parts; clay powder: 10-15 parts ;Silimanite: 5-8 parts; Zirconia: 5-8 parts; Ceramic powder: 5-10 parts; Floating beads: 3-8 parts. [0004] Mullite is a mineral produced by aluminosilicate at high temperature. It is a high-quality refractory raw material with the characteristics ...

AI Technical Summary

Problems solved by technology

[0002] The refractory bricks used in industrial boilers are usually clay bricks, which can withstand high temperatures of 1750°C. However, the hardness, corrosion resistance and thermal insulation performance of clay bricks currently on the market are not good enough, which will cause safety hazards and energy loss.