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  • Product Name: high alumina brick for blast ...
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High density alumina brick for blast furnace

 
It is kind of high alumina bricks content of alumina above 65%, it's made of bauxite as main raw material, by shaping and calcinating at high tempreture 1420-1530℃.
 
 
Features
1.High temperture resistance.
2.Chemical Corrosion resistance.
3.Good thermal shock stability.
4.Slag resistance.
 
Applications
mainly used in linings of rotary kiln, blast furnace, hot stove, top of electric furnace, heat treatment furnace, also incinerators for medical and household waste etc.
 
TECHNICAL DATA
index high-alumina brick for blast furnace AL2O3-C brick for blast furnace
item GL-55 GL-65 GL-75 unburnt AL2O3-C brick AL2O3-C brick
AL2O3%  ≥ 55 65 76 60 60
Fe2O3%  ≤ 2 2 2 1.5 1.5
C%  ≥       12 12
refractoriness  ≥ 1770 1790 1790
0.2MPa refractoriness under load   ≥ 1480 1500 1520 1650 1650
linear change after heating %(1500×2h) 0~-0.2 0~-0.2 0~-0.2 ±0.2 ±0.2
apparent porosity % ≤ 19 19 19 10 18
cold crushing strength MPa  ≥ 49 58.8 70 40 60
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