High Alumina Brick

  • High Alumina Brick

Product Description And Parameters

Composition:Al2O3+SiO2

Application:Various kinds of industrial kiln

Raw Material:High grade bauxite or corundum

Refractoriness:≥1790℃

Capacity:1000 tons per month

High alumina brick refers to refractory products with Al2O3 content higher than 48%.It is made of bauxite or other raw materials of high alumina content .The refractoriness of high alumina brick can be more than1770℃ .

According to the content of Al2O3, high alumina bricks are usually pided into three grades: Grade I──Al2O3 content>75%; Grade II──Al2O3 content is 60~75%; Grade III──Al2O3 content is 48~60%.

Features
1.Low creep.
2.Good slag resistance.
3.Strong thermal shock stability.
4.Good erosion resistance.

Application
High alumina bricks are mainly used for lining blast furnaces, hot blast furnace, electric furnace roofs, blast furnaces, reverberatory furnaces, and rotary kilns.

Item Common High Alumina Brick
LZ-48 LZ-55 LZ-65 LZ-75 LZ-80
Al2O3(%) 48 55 65 75 80
Apparent Porosity(%) 22 22 23 23 22
Cold Crushing Strength(%) 35 40 45 50 55
0.2 MPa Refractoriness Under Load(℃) 1420 1450 1500 1520 1530
Permanent Linear Change(%) 1500℃*2hr - -0.4~0.1
1450℃*2hr -0.4~0.1 -

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