Jundao (Henan) New Materials Co.,Ltd.
Jundao（Henan）New Materials Co.,Ltd.
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Low creep high alumina based Refractory ball for Hot blast stove of Steel making 70% Al2O3
Refractory ball provided by us is made of bauxite, alumina, mullite, corundum, zirconia corundum, chrome corundum, cordiarite and other refractory raw materials. After repeated development and improvement by our technical department, low creep is the most outstanding feature of refractory ball, and the product is widely used in hot blast stove steel industry, the using effect is remarkable.
Refractory ball features:
Low creep
High compressive strength and high mechanical strength
Excellent high temp performance
Good wear resistant and good chemical stability
Long service time
| Refractory ball | RQA-55 | RQA-65 | RQA-70 | RQA-75 | RQA-80 |
| Al2O3 (%) ≥ | 55 | 65 | 70 | 75 | 80 |
| Fe2O3 (%)≤ | / | / | 1.2 | 1.8 | 1.6 |
| Bulk density (g/cm3) ≥ | 2.10 | 2.30 | 2.65 | 2.50 | 2.70 |
| Apparent porosity (%) ≤ | 28 | 26 | 22 | 24 | 22 |
| Cold crushing strength(KN) ≥ | 8 | 10 | 30 | 15 | 25 |
| Refractoriness under load (℃) ≥ | 1400 | 1450 | 1520 | 1480 | 1530 |
| Thermal shock resistance 1100℃, water cooling (times) ≥ | 15 | 15 | 15 | 15 | 10 |
