Home > Products > Refractory Brick > High Alumina Brick
Color:Yellow
Raw Material:High grade bauxite or corundum
Refractoriness:≥1790℃
Capacity:1000 tons per month
Package:Export wooden pallets
Product Introduction
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 than 1770℃ .
According to the content of Al2O3, high alumina bricks are usually divided 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.
Technical Data
| 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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