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High alumina brick
High alumina bricks refer to inorganic non-metallic materials with an alumina (Al2O3) content exceeding 48% and a refractory temperature exceeding 1580°C. They are a type of aluminum-silicon refractory material. The following is a detailed introduction to the classification of high alumina bricks:
There are many ways to classify high alumina bricks, mainly including the following:
Classification by raw material ratio (alumina content):
Special grade high alumina brick: alumina content ≥80%.
First-grade high alumina brick: the alumina content is between 75% and 80%, and it is also said that the alumina content is greater than 75%.
Secondary high alumina brick: the alumina content is between 60% and 75%.
Grade 3 high alumina bricks: The alumina content is between 48% and 60%, and some say it is between 48% and 65%.
Classification by mineral composition:
Low mullite (sillimanite) high alumina brick.
Mullite high alumina brick.
Mullite-corundum high alumina brick.
Corundum-mullite high alumina brick.
Corundum high alumina brick.
Classification by appearance:
Standard brick.
Ordinary brick.
Wedge-shaped bricks.
Special shaped and odd shaped bricks.
Classification by performance characteristics or kiln type used:
Ordinary high alumina brick.
Low creep high alumina bricks (commonly used in hot blast furnaces).
High load soft high alumina brick.
Slightly expanded high alumina brick.
Phosphate bonded high alumina bricks (commonly used in ceramsite, lithium oxide, zinc oxide rotary kilns).
Anti-stripping high alumina bricks for cement kilns.
In addition, according to different parts of use, you can also choose high-alumina bricks of different sizes, specifications and shapes, such as knife-shaped, axe-shaped, high-alumina arch foot bricks, high-alumina anchor bricks, etc.
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