High Alumina Fire Bricks

High alumina fire bricks are high quality refractory material. They usually have a higher refractoriness and is usually used in extra high temperature environment such as kilns, furnaces, incinerators, etc.

High Alumina Fire Bricks Manufacturers

High Alumina Fire Bricks
High Alumina Fire Bricks Manufacturer

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With four productive factories running day and night, Rongsheng Kiln Refractory is able to produce more than 60 tons of refractory material each month. With high technical backup, we are able to lower the cost as much as we can, and offer you the best product with lowest price throughout China.

What Is High Alumina Fire Brick

High Alumina Fire Brick
What Is High Alumina Fire Brick

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High alumina fire brick here in china, refers to a kind of alumina silicate refractory material, which contains more than 48% alumina oxide. Bauxite and other material contains high ratio of alumina oxide are molded and sintered under high temperature to be produced into fire bricks.

Those fire bricks with high alumina are refractories that can be used in building electric arc furnace, glass kiln, cement rotary kiln, etc.

Advantages of High Alumina Fire Bricks

High Alumina Bricks
Advantages of High Alumina Fire Bricks

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High alumina fire brick made by Rongsheng Kiln Refractory has many advantages. High refractoriness under load, low creep are the prominent good features of the product. Superfine bauxite, fused corundum, fused mullite are the main raw material of high alumina fire bricks. These bricks have a strong ability to resist corrosion, which, comes from iron slags, harmful air and other by product in the kiln. They also have a good thermal stability. These bricks are fine masonry products for middle and large hot air stove.

Item Index
International Code Name SK35 SK36 SK37 SK38 SK40
Chinese Code Name LZ-48 LZ-55 LZ-65 LZ-75 LZ-80
Al2O3 ,% ≥48 ≥55 ≥65 ≥75 ≥80
Fe2O3, % ≤2 ≤2 ≤2 ≤2 ≤2
Refractoriness℃, min 1750 1770 1790 1790 1790
Apparent Porosity% ≤22 ≤22 ≤23 ≤23 ≤21
Bulk Density g/cm3 2.25-2.35 2.25-2.35 2.25-2.35 2.25-2.35 2.25-2.35
Cold Crushing Strength Mpa ≥39 ≥44 ≥49 ≥54 ≥65
0.2Mpa Refractoriness Under Load T0.2 ℃,min ≥1420 ≥1470 ≥1500 ≥1520 ≥1530
Permanent Linear Change On Reheating +0.1~-0.4 +0.1~-0.4 +0.1~-0.4 +0.1~-0.4 +0.1~-0.4
(%)1500℃X2h x1450℃

Classification of high alumina fire bricks

alumina fire bricks
Classification of high alumina fire bricks

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High alumina fire bricks are classified based on the content of alumina oxide(Al2O3). Common types of high alumina fire bricks include those contain 48%, 55%, 60%, 65%, 73%, 75%, and 80% of Al2O3.

Those bricks contain less than 55% Al2O3 are fireclay bricks, which are a kind of neutral refractory material. These bricks are made from bauxite and other material with a high content of aluminate oxide. the product has a high thermal stability. They are usually used in glass furnace, cement rotary kiln and electric arc furnace as linings.

There is also those kinds of bricks with high refractoriness under load, with low creep, and with low porosity. Different ratio of ingredients resulted in different types of bricks.

The difference between high alumina bricks and fireclay bricks are way more than the content difference. They have a similar manufacturing process, but more chamotte is mixed in the ingredient of high alumina fire bricks which is between 90%~95%. Also the firing temperature of high alumina is much higher. In practical use, class I and II high alumina fire bricks are usually applied in tunnel kiln, blast furnace, roof of furnaces, reverberator furnace, and rotary kiln where temperature is between 1500-1600°C.

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