In the refractory industry, high alumina bricks are a neutral refractory material with an alumina content of over 48%. Made from raw materials with high alumina content, such as bauxite, through molding and calcination. High thermal stability, with a fire resistance of over 1770 ℃. Good slag resistance, there are also many types of high alumina bricks in use, which play different roles in their respective fields. Let's take a look together below:
1. General purpose high alumina brick
Raw materials and processes: High alumina bricks are generally made from high-quality bauxite clinker, supplemented with clay and additives.
Features: The product has the advantages of high fire resistance, good resistance to acid and alkali erosion, high temperature strength, and good thermal shock stability.
Usage: Widely used as thermal equipment in metallurgy, petroleum, chemical, building materials, machinery, processing and other industries.
2. High alumina bricks for blast furnaces
Raw materials and processes: High alumina bricks for blast furnaces are mainly made of high-quality alumina clinker, which is formed under high pressure and sintered at high temperature. The main mineral components are mullite and corundum.
Features: The product has excellent high-temperature mechanical properties and chemical resistance.
Usage: Used for various parts of blast furnace lining.
3. High alumina bricks for steelmaking electric furnace roof
Product features: High alumina bricks for steelmaking electric furnaces are mainly made of selected special grade bauxite clinker, which is formed under high pressure and sintered at high temperature. The main mineral composition is corundum and mullite phases, which have excellent high-temperature mechanical properties and chemical resistance. Especially for non fired products, their external dimensions are larger and their thermal shock stability is better.
4. Low creep series high alumina bricks for hot blast stoves
Raw materials and processes: Low creep series high alumina bricks for hot blast furnaces are mainly made of corundum mullite and Yangquan excellent alumina clinker, and are formed by high-pressure molding and high-temperature sintering.
Features: The product has a high load softening temperature, good high-temperature creep resistance, and excellent thermal shock resistance.
Usage: It is the preferred material for large and medium-sized hot air stoves.
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