yixing xinwei leeshing refractory materials co.,Ltd
Excellent quality, Customer first, Common development
Add to Cart
Very good corrosion resistance Magnesia based refractory gunning material used in the back kilneye
steel ladle mainly suffers high temperature steel liquid (about 1650℃) thermal impaction, mechanical abrasion, molten slag and steel liquid chemical corrosion, especially damage to ladle bottom is the severest. For middle size and large scale ladles, corundum magnesia castable and corundum alumina magnesia spinel castable are usually used as ladle wall and bottom working lining. Slag line zone is usually built by magnesia carbon bricks. Gunning castable use in steel ladle includes alumina magnesia gunning castable, magnesia gunning castable, magnesia spinel gunning castable and so on.
Application
Low cement castable is used in the back kilneye, wicket cover and back of cooling machine of cement rotary kiln and other thermal equipment with good performance and long service life.
Magnesia based refractory gunning mass
| Material | Magnesia | magnesia-calcium1 | magnesia-calcium2 | |
| Chemical Composition % | MgO | ≥80 | 65~75 | 55~65 |
| SiO2 | 4~6 | ≤5 | ≤5 | |
| CaO | - | 8~10 | 20~35 | |
| Bulk density g/cm3 | 110°C,24h | 1.6~2.0 | 1.7~2.0 | 1.7~2.0 |
| 1500°C,3h | 1.7~2.1 | 1.8~2.1 | 1.8~2.1 | |
| Bending Strength MPa | 110°C,24h | 1.5~2.0 | 1.6~2.3 | 2.0~2.5 |
| 1500°C,3h | 4~6 | 5~6 | 5~8 | |
| Reheating linear change % | 110°C,24h | -(1.0~1.5) | -(1.2~1.8) | -(1.2~2.5) |
| 1500°C,3h | -(2.5~3.1) | -(2.0~3.0) | -(2.5~3.2) | |
| Thermal conductivity W/(m.k) | 1000°C | ≤0.6 | ≤0.6 | ≤0.6 |
Al2O3-SiC-C based refractory gunning mass
| Item | Al2O3-SiC-C based refractory gunning mixes | |||
| Chemical Composition % | Al2O3 | 67 | 70 | 22 |
| SiC | 14 | 10 | 60 | |
| SiO2 | - | - | 15 | |
| CaO | - | - | 1.4 | |
| F.C | 3 | 3 | - | |
| Bulk density g/cm3 | 2.56(110°C) | 2.75(110°C) | 2.5(816°C) | |
| 2.62(1450°C) | 2.73(1450°C) | |||
| Apparent porosity % | 18.5(110°C) | 21.6(110°C) | 16.0(816°C) | |
| 9.6(1450°C) | 20.0(1450°C) | |||
| Strength Mpa | Bending Strength 16.0(110°C) 19.6(1450°C) | Bending Strength 2.5(110°C) 6.7(1450°C) | Compressive strength MPa 83(816°C) | |
| Reheating linear change % | -0.50(1450°C) | +0.11 | -0.1(816°C) | |
| water content to mixture % | 6 | 6 | 6 | |
Related technical parameters should be appointed temporarily in the contract according to the specific service environment.
Packing and Shipping
1.The sturdy packaging protects the goods from any possible damage during transportation.
2. Sturdy packaging and overall filling to prevent the box from shaking and vibrating.
3. Take the necessary precautions to prevent the goods from being stolen or exposed to rain.
4. We will deliver the goods on time, with guaranteed quality and quantity, in full accordance with the contract and customer requirements.