Professional Refractoriness Degree Magnesia Refractory Fire Bricks For RH Furnace
Professional Refractoriness Degree Magnesia Fired Brick Magnesia refractory Brick for RH furnace
RH furnace refractory configuration
The part of the hot bending pipe is the waste flue gas passage of the RH vacuum tank, which is not in contact with molten steel and slag, and the damage to the refractory material is small. The main reason for the damage is mechanical action. The stress generated by temperature fluctuations and the erosion and erosion caused by hot gas flow liquid slag, etc
The direct-bonded magnesia-chrome brick XBM Ge-16 with good thermal shock stability and corrosion resistance is used for working lining; the lightweight high-alumina brick XLG-1.0 is used for thermal insulation lining; calcium silicate insulation board is used for thermal insulation lining.
Observation hole. Magnesium-chrome castables are used for the top gun, and corundum-spinel castables or fired high-quality magnesia-chrome bricks are used in the manhole.
| 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 |
FLow chart
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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