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Blast furnace tap hole combination brick

product Overview:   High-alumina brick for blast furnace is a refractory product which is calcined high-quality high-alumina bauxite clinker and binder first through granulation and pulverization processes, mixed at a certain ratio, and then press-molded and fired at high temperature. According to the physical and chemical indicators, it is divided into three grades: GL-65, GL-55, and GL-48. Mainly used for masonry blast furnace below the belly.
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Product Description

  product Overview:

 

  High-alumina brick for blast furnace is a refractory product which is calcined high-quality high-alumina bauxite clinker and binder first through granulation and pulverization processes, mixed at a certain ratio, and then press-molded and fired at high temperature. According to the physical and chemical indicators, it is divided into three grades: GL-65, GL-55, and GL-48. Mainly used for masonry blast furnace below the belly.

 

  Physical and chemical indicators:

 

Item Indicator
GL-65 GL-55 GL-48
Al2O3        %          ≥ 65 55 48
Fe2O3       %            ≤ 2.0
Refractory      ℃ 1800 1780 1760
Apparent porosity       %            ≤ 19 19 18
Compressive strength at room temperature     Mpa       ≥ 58.8 49 49
0.2MPaLoad softening start temperature ℃   ≥ 1500 1480 1450
Reburning line change           % 1500℃×2h
-0.2~+0
1450℃×2h
-0.2~+0

 

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