High alumina refractory brick with silicon carbide mullite

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Aluminum silicon refractory bricks, also known as refractory bricks containing aluminum trioxide and silicon dioxide, contain various types of refractory bricks, including: (1) silicon bricks; (2) Semi silica bricks; (3) Clay bricks; (4) High alumina bricks; (5) Mullite bricks; (6) Corundum bricks, etc.

(1) Silicon bricks are mainly made of silica (quartz sand, vein quartz, quartz sandstone, etc.) as raw materials.

(2) Clay bricks are mainly made of hard clay (pyroxene) or bauxite.

(3) High alumina bricks are mainly made of bauxite, mullite, or homogenized materials.

(4) Corundum bricks are mainly made of corundum based raw materials such as brown corundum and white corundum.

High alumina brick refractory brick is a type of shaped refractory material formed and calcined from high alumina bauxite or other raw materials with high alumina content. It is an essential raw material for lining high-temperature kilns. It has high thermal stability, a fire resistance of over 1770 ℃, and good slag resistance. The aluminum content of high alumina refractory bricks varies depending on the type of use, but only when the aluminum content reaches 48% or more can they be called high alumina bricks.

High alumina refractory bricks can be divided into first grade high alumina bricks, second grade high alumina bricks, third grade high alumina bricks, special grade high alumina bricks, corundum bricks, low creep high alumina bricks, dense high alumina bricks, aluminum silicon carbide high alumina bricks, and andalusite high alumina bricks based on the different alumina content and raw materials. The following is an introduction to the aluminum content of each type of high alumina brick:

1. Three level high alumina bricks. Grade III high alumina bricks refer to refractory bricks with an alumina content between 48%<AL2O3<60%.

2. Secondary high alumina bricks. Secondary high alumina bricks refer to refractory bricks with an alumina content between 60% ≤ AL2O3<70%.

3. First grade high alumina bricks. Primary high alumina bricks refer to refractory bricks with an alumina content between 70%<AL2O3 ≤ 75%.

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