Classification of Mullite Bricks - RS Refractory Manufacturer

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Mullite Bricks are high-aluminum refractory materials with mullite (3Al2O3 · 2SiO2) as the main crystal phase. Generally the alumina content is between 65% and 75%. In addition to mullite, those with lower alumina also contain a small amount of glass phase and cristobalite; those with higher alumina also contain a small amount of corundum. Contact RS. Mullite brick has a high fire resistance, which can reach above 1790 ° C. Load softening start temperature is 1600 ~ 1700 ℃. The compressive strength at room temperature is 70 ～ 260MPa. Good thermal shock resistance.
Mullite Brick for Sale in RS Refractory Manufacturer
Classification of Mullite Bricks

There are two types of mullite bricks, one is sintered mullite bricks and another is fused mullite bricks.

The sintered mullite brick is made of high alumina bauxite clinker, and a small amount of clay or raw alumina is added as a binder, and then formed and fired.

The fused mullite brick is made of high alumina, industrial alumina and refractory clay, and is added with charcoal or coke fine particles as a reducing agent. After molding, it is manufactured by reduction electrofusion method. The fused mullite crystals are larger than the sintered mullite and have better thermal shock resistance than the sintered products.

The high temperature performance of mullite bricks mainly depends on the content of alumina and the uniformity of mullite phase and glass distribution. 
More info about the RS cheap fire bricks, such as mullite brick: https://cheapfirebricks.com/mullite-brick/. 

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