Fused Magnesia High Purity Magnesite Refractory Bricks For RH Furnace Lining
High quality fused magnesia and high purity Magnesite refractory bricks for RH furnace lining
RH furnace refractory configuration - Middle and upper troughs
The middle and upper troughs are mainly located in the impact position of the top lance for oxygen blowing and the alloy chute feeding, and the splash of molten steel and slag on the working lining is serious. The temperature fluctuates greatly, and the oxidation of iron, silicon, manganese, aluminum and other elements in the alloy and molten steel together with the slag in the molten steel causes the erosion of the working lining of the refactory material. The damage is more serious.
Semi-rebonded magnesia-chrome brick XBMGe-20 for working lining, high-alumina brick XLZ-55 or direct-bonding magnesia-chrome brick XZMGe-12 for secondary working lining, lightweight high-alumina brick XLG-1.0 for thermal insulation lining, thermal insulation lining Use calcium silicate board.
An expansion joint is left at the contact part of the upper groove and the hot bending pipe, which is filled with aluminum silicate fiber cotton.
| Directly bonded magnesia chrome brick | |||||||||
| XZMGe-18A | XZMGe-18B | XZMGe-20A | XZMGe-26 | DMC-12 | DMC-6 | DMC-4 | DMC-9A | DMC-9B | |
| MgO ≥% | 55 | 55 | 60 | 40 | 60 | 75 | 80 | 70 | 70 |
| SiO2 ≤% | 1.5 | 2.5 | 3.0 | 3.2 | 2.8 | 2.5 | 2.8 | 3.0 | |
| CaO ≤% | 2.0 | ||||||||
| Cr2O3 ≥% | 18 | 18 | 20 | 26 | 12 | 6 | 4 | 9 | 9 |
| Apparent porosity | 18 | 18 | 18 | 21 | 19 | 18 | 18 | 19 | 19 |
| Normal temperature compressive strength≥MPa | 40 | 40 | 35 | 35 | 35 | 40 | 40 | 40 | 40 |
| 0.2MPa Load softening starting temperature | 1700 | 1700 | 1700 | 1700 | 1650 | 1600 | 1580 | 1600 | 1580 |
| Bulk density ≥g/cm3 | 3.0 | 3.0 | 3.10 | 3.2 | 3.0 | 2.9 | 2.95 | 2.98 | 2.98 |
| Index | Semi-Rebonded Magnesite-Chrome Brick | ||||
| ZMC-35 | ZMC-28 | ZMC-20 | ZMC-18 | ZMC-15 | |
| MgO% | ≥50 | ≥55 | ≥55 | ≥66 | ≥60 |
| Cr2O3% | 35-37 | 28-30 | 20-22 | 18-20 | 15-18 |
| SiO2 | – | – | – | – | – |
| Refractoriness Under Load 0.2MPa℃ | 1700 | 1700 | 1700 | 1700 | 1700 |
| Apparent porosity% | ≤16 | ≤16 | ≤16 | ≤16 | ≤16 |
| Cold Crushing Strength Mpa | ≥45 | ≥45 | ≥45 | ≥40 | ≥40 |
| Bulk density(Kg/m3) | 3350 | 3250 | 3200 | 3100 | 3050 |
| Thermal Shock Resistance (950℃ Air cooling ) | 40 | 40 | 40 | 40 | 40 |
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Company profile
- Founded in the 1984, listed on the Hong Kong Stock Exchange on October 15, 1999 (name: China Rare Earth, code: 0769)
- The company is headquartered in Yixing, with branches in Shanghai and Hong Kong
- Professional manufacturer of Rare Earth and refractories
- The top 3 supplier of refractories in China
- covers an area of 360,000 square meters and a building area of 240,000 square meters.More than 2,000 employees, Scientific and technological personnel account for 30% of the total number of employees.
- Obtained more than 11 patent certificates
- Established a technical cooperation relationship with Japan Krosaki Harima Corp.
- Long-term supply to Japan Nippon Steel, Japan NKK, Kimizu, Aoida and Nisingkou steel Co
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