Refractory ball for hot-blast furnace is a solid sphere composed of refractory aggregate and refractory powder, mixed with bond, molded and fired, used as the heat regenerator of ball-type hot-blast furnace.
The refractory ball for ball-type hot-blast furnace produced by our factory is made by highly precise technology and mechanical molding method. It is of high bulk & density, low creep, high softening temperature with load, thermal shock resistance, good corrosion resistance. It can develop the smelting condition efficiently, increase hot blast temperature, reduce energy consumption of iron-making, prolong the service life of ball-type hot-blast furnace.
Based on chemical composition, refractory ball for ball-type hot-blast furnace can be divided into five types: high alumina ball, fused alumina zirconia ball, pink fused alumina ball, alumina-zirconia-chromic compound ball and low creep ball.
Refractory Ball for Hot-Blast Furnace Standard Size:
Based on diameter size, it can be divided into four types: φ40mm, φ50mm, φ60mm, φ80mm. We can also offer customized products according to your requirements on content, index and specification.
Physical & Chemical Indexes:
For High Alumina Refractory Ball:
| Refractory Ball for Hot-Blast Furnace | Index | |
| ω(Al2O3) / % | ≥ | 75 |
| ω(Fe2O3) / % | ≤ | 1.8 |
| Bulk & Density / (g/cm³) | ≥ | 2.35 |
| Apparent Porosity / % | ≤ | 24 |
| Cold Crushing Strength / Ball | ≥ | 11 |
| Softening Start Temperature with Load / ℃ | ≥ | 1450 |
For Fused Alumina Zirconia Ball, Pink Fused Alumina Ball, Alumina-Zirconia-Chromic Compound Ball and Low Creep Ball:
| Item | RQAZ-82 | RQAZ-88 | RQAZC-80 | RQAD-70 | |
| ω(Al2O3)/% | ≥ | 78 | 86 | 75 | 70 |
| ω(Cr2O3)/% | ≥ | - | 2 | 0.5 | - |
| ω(ZrO2)/% | ≥ | 4.5 | - | 4.5 | - |
| ω(Fe2O3)/% | ≤ | 0.6 | 1.0 | 1.6 | 1.8 |
| Bulk & Density / (g/cm³) | ≥ | 3.05 | 2.90 | 2.75 | 2.60 |
| Apparent Porosity / % | ≤ | 18 | 18 | 22 | 24 |
| Cold Crushing Value/KN | ≥ | 35 | 35 | 25 | 15 |
| Softening Start Temperature with Load / ℃(100N/Ball) | ≥ | 1550 | 1550 | 1550 | 1550 |
| Thermal Vibration Stability (1100℃, Cold Water)/Times | ≥ | 8 | 7 | 10 | 15 |
| Creep Efficiency/%(100N/Ball,1400℃,50h) | ≤ | - | - | - | 1.0 |
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