Silicon Carbide Brick

High heat conductivity
Good abrasive resistance
Great thermal shock resistance
Excellent erosion resisting
Strong resistant to acid and alkali slag erosion
Good high and low temperature strength
Low heat expansion coefficient

     

Brief Description

Silicon carbide bricks are refractory materials manufactured with SiC as the main raw material, which include 72%~99% SiC content. Silicon carbide bricks are manufactured with mixing SiC granule, SiC powder and binding agent through ageing mixture, moulding, drying and firing. Silicon carbide bricks have features of high thermal conductivity, great wear resistance and can be used for linings of aluminium cell.

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Silicon carbide bricks can be classified into clay bonded silicon carbide bricks, Si3N4 bonded silicon carbide bricks, Sialon bonded silicon carbide bricks, β-SiC bonded silicon carbide bricks, Si2ON2 bonded silicon carbide bricks and recrystal silicon carbide bricks.

Technical Datas

Silicon Carbide Refractory Bricks
Items Unit SiO2 Bonded Silicon Carbide Bricks Azoxty-cornpounds Bonded Silicon Carbide Bricks Mullite Bonded Silicon Carbide Bricks
Al2O3 % ~ ~ ≥10
SiO2 % ≤8 ~ ~
Fe2O3 % ≤1 ≤0.6 ≤1
Sic % ≥90 ≥80 ≥85
Apparent Porosity % ≤18 ≤18 ≤18
Bulk Density g/cm3 ≥2.56 ≥2.60 ≥2.56
Cold Crushing Strength Mpa ≥80 ≥100 ≥70
Refractoriness under Load ≥1600 ≥1620 ≥1550
Thermal Shock Stability (Time/850) ≥40 ≥40 ≥35
Thermal Conductivity w/m*k ≥8 ~ ~
Normal Temperature Bending Strength Mpa ≥25 ≥30 ≥25
High Temperature Bending Strength1250℃*1h Mpa ≥20 ≥25 ≥20
Maximum Service Temperature 1400 1500 1400

Application

Lining of the aluminium cell and coke oven
Molten aluminum tube, and glass furnace
Kiln furniture used in the ceramic kiln
Blast furnace shaft, belly, or bosh of the large or medium ones
Znc retort lining, etc

Manufacturing Process

Nitride bonded silicon carbide bricks: manufactured with silicaon carbide granule and fine silicon powder
Bonded silicon carbide bricks: Mix SiC, silicon powder and carbon powder according to certain proportion through mixing and molding at the high temperature of 1400℃ in reducing atmosphere. Generally, adopt carbon embeded firing process
Silicon oxynitride bonded silicon carbide bricks: when making this kind of fire brick, proportion of fine silicon powder should not be less than silicon carbide

Related Refratory Brick

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