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High-alumina low-creep fire-resistant ball

product Overview:   High-alumina low-creep fire-resistant ball is a solid sphere made by mixing, molding and firing refractory aggregate, refractory powder and binder. According to the physical and chemical indicators are divided into RQA-55, RQA-65, RQA-75, RQA-80, RQAD-70 five brands. According to the diameter, it is divided into six specifications: φ18mm, φ25mm, φ40mm, φ50mm, φ60mm, and φ80mm. It is mainly used for kiln such as ball-type hot air furnace and heating furnace.
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Product Description

  product Overview:

 

  High-alumina low-creep fire-resistant ball is a solid sphere made by mixing, molding and firing refractory aggregate, refractory powder and binder. According to the physical and chemical indicators are divided into RQA-55, RQA-65, RQA-75, RQA-80, RQAD-70 five brands. According to the diameter, it is divided into six specifications: φ18mm, φ25mm, φ40mm, φ50mm, φ60mm, and φ80mm. It is mainly used for kiln such as ball-type hot air furnace and heating furnace.

 

  product Overview:

 

Item High aluminum refractory ball Low Creep Refractory Ball
RQA-55 RQA-65 RQA-75 RQA-80 RQAD-70
Al2O3        %      ≥ 55 65 75 80 70
Fe2O3        %      ≤ - - 1.8 1.6 1.8
Bulk Density      g/cm³          ≥ 2.1 2.3 2.5 2.7 2.6
Apparent porosity       %           ≤ 28 26 24 22 24
Withstand voltage value at room temperature    KN        ≥ 8 10 15 25 15
Load softening start temperature (100N / ball)   ℃   ≥ 1400 1450 1480 1530 1550
Thermal shock stability (1100 ° C, water-cooled)       ≥ 15 15 15 10 15
Creep rate (100N / ball,1400℃×50h) %         ≤1.0

 

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