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Corundum brick

product Overview:   Plastic phase composite corundum brick is a composite refractory product with corundum, silicon carbide, and a binder mixed in a certain ratio, and then pressed and molded at high temperature to produce soft, high strength, strong flexibility, and good slag resistance. Mainly used for masonry blast furnace hearth, furnace bottom lining, calcium carbide furnace door, etc. According to physical and chemical indicators, it is divided into four grades: ZSG-1, ZSG-2, ZSG-3 and ZSG-4.
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Product Description

  product Overview:

 

  Plastic phase composite corundum brick is a composite refractory product with corundum, silicon carbide, and a binder mixed in a certain ratio, and then pressed and molded at high temperature to produce soft, high strength, strong flexibility, and good slag resistance. Mainly used for masonry blast furnace hearth, furnace bottom lining, calcium carbide furnace door, etc. According to physical and chemical indicators, it is divided into four grades: ZSG-1, ZSG-2, ZSG-3 and ZSG-4.

 

  Physical and chemical indicators:

 

Item Indicator
ZSG-1 ZSG-2 ZSG-3 ZSG-4
Al2O3        %         ≥ 80 75 70 78
SiC            %    6~10 6~10 0~3 2~5
Si3N4         %     - - 6~10 4~8
Fe2O3        %         ≤ 1.0 1.0 1.0 1.0
Bulk Density         g/cm³            ≥ 3.0 2.9 2.9 2.9
Apparent porosity       %           ≤ 15 16 16 16
Compressive strength at room temperature     Mpa        ≥ 110 90 100 100
Heating permanent line change(1500℃×2h)       %   +0.1~-0.2 +0.1~-0.2 +0.1~-0.2 +0.1~-0.2
Load softening start temperature(0.2Mpa,0.6%)   ℃  ≥ 1680 1660 1680 1660

 

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