Mullite carborundum brick used for dry quenching stove

Abstract

The invention discloses a mullite carborundum brick used for a dry quenching stove. The mullite carborundum brick used for the dry quenching stove is prepared by following materials according to the weight part ratio: 35 to 55 parts of electric smelting mullite with a particle size of 5 to 3 millimeters, 10 to 15 parts of sub-white fused alumina with the particle size of 250 to 300 millimeters, 10 to 15 parts of silicon carbide concentrate with the particle size of 2 to 0 millimeters, 25 to 30 parts of silicon carbide concentrate with the particle size of 180 to 200 millimeters, 3 to 5 parts of alumina powder with the particle size of 5 to 6 micrometers, 1 to 2 parts of paper pulp, 1 to 2 parts of metallic aluminum and 1 to 2 parts of metallic silicon. The content of alumina in the mullite carborundum brick is more than 30%, and the content of silicon carbide is 30% to 40%. Refractoriness is more than 1790 DEG C, the beginning temperature of the softening of loading is more than 1600 DEG C, density is more than 2.60 gram per cubic centimeter, gas hole ratio is less than 20%, and strength is more than 90 megapascal.

Description

technical field [0001] The invention relates to coking technology, and is a mullite silicon carbide brick used in dry quenching coke ovens. Background technique [0002] Generally, the refractory mullite silicon carbide bricks used in coking are mainly used in the CDQ chute area. The loss caused is large, and the use of ordinary refractory materials cannot meet the requirements for the use of CDQ coke ovens, but this kind of brick has high porosity, compressive strength, high temperature bending resistance, poor thermal shock stability, poor wear resistance, and Due to poor erosion and corrosion resistance, problems such as deformation, adhesion, and shedding are prone to occur during use, which reduces the service life and increases production costs, eventually leading to shutdown, maintenance, and overhaul. So this kind of brick has been basically eliminated. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a ...

AI Technical Summary

Problems solved by technology

[0002] Generally, the refractory mullite silicon carbide bricks used in coking are mainly used in the CDQ chute area. The loss caused is large, and the use of ordinary refractory materials cannot meet the requirements for the use of CDQ coke ovens, but this kind of brick has high porosity, compressive strength, high temperature bending resistance, poor thermal shock stability, poor wear resistance, and Due to poor erosion resistance and other reasons, problems such as deformation, adhesion, and shedding are prone to occur during use, which reduces the service life and increases production costs, eventually leading to shutdown, maintenance, and overhaul