Silicon Carbide Bricks

 

Silicon carbide bricks are classified into different types according to binding methods: clay bonded silicon carbide bricks, self bonded silicon carbide bricks, SiO2 bonded silicon carbide bricks, ferrosilicon bonded SiC bricks, Si3N4 bonded SiC bricks and so on. By chemical composition, they are divided into high alumina silicon carbide bricks, fireclay silicon carbide bricks, silica-silicon carbide bricks, corundum-silicon carbide bricks, etc..

 

 

 

 

 

Clay Bonded Silicon Carbide Bricks

Clay bonded silicon carbide bricks belong to aluminum silicate bonded SiC bricks, SiC content is usually between 50%~90%. Clay and aluminum silicate minerals contains some ratio of R2O, RO   and Fe2O3 impurities, so high temperature performance of clay bonded silicon carbide bricks is not so good.

Clay bonded SiC refractory are mainly used as muffle boards of various kinds of industrial kilns and furnaces, ceramics kiln furniture ( refractory slab, sagger and so on).

 

Mullite Bonded Silicon Carbide Bricks

Mullite bonded silicon carbide bricks usually contain 65%~85% of SiC. They have better high temperature performance than clay bonded SiC bricks. Mullite bonded SiC bricks are widely used in ceramics industry, nonferrous metals industry, machinery industry and so on.

 

Silica Bonded Silicon Carbide Bricks

SiO2 bonded SiC bricks adopts high purity SiO2 micro powder as binding agent. SiO2 bonded SiC bricks have higher modulus of rupture than mullite bonded SiC bricks, they are mainly used as kiln furniture.

 

Nitride Bonded Silicon Carbide Bricks

Nitride bonded silicon carbide bricks include: Si3N4 bonded SiC bricks, Sialon bonded SiC bricks, Si2N2O bonded SiC bricks and other single phase or composite phase nitride bonded SiC bricks.

The main applications of nitride bonded silicon carbide bricks are steelmaking industry, nonferrous metals metallurgy, ceramics industry, etc. For example, Si3N4 bonded SiC bricks are widely used in blast furnace shaft lower part and tuyere suit, aluminum cell inner lining and kiln furniture.   

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