Silicon carbide brick is a refractory material made of SiC as the main raw material. Mohs hardness 9. It is more stable for acidic slag. Containing SiC 72% ~ 99%. Divided into clay bonded, Si3N4 bonded, Sialon bonded, β-SiC bonded, Si2ON2 bonded and recrystallized silicon carbide bricks.Generally, black silicon carbide (SiC content of more than 96%) is used as raw material, and a binder (or no binder) is added, and it is prepared through the processes of batching, mixing, molding and firing. The main crystal phase is silicon carbide.The main varieties are oxide-bonded silicon carbide bricks, carbon-bonded silicon carbide bricks, nitride-bonded silicon carbide bricks, self-bonded silicon carbide bricks, recrystallized silicon carbide bricks and semi-silicon carbide bricks.It has the characteristics of good wear resistance, corrosion resistance, high temperature strength, good thermal shock stability, high thermal conductivity, and small thermal expansion coefficient. It is a high-performance refractory material.
| Item/Grade | GM1650 | GM1600 | GM1550 |
|---|---|---|---|
| ω (Al2O3) ≥/% | 65 | 63 | 60 |
| Bulk Density ≥/(g/cm³) | 2.65 | 2.60 | 2.55 |
| Apparent Porosity ≤/% | 17 | 17 | 19 |
| Cold Crushing Strength ≥/MPa | 85 | 90 | 90 |
| 0.2MPa Refractoriness Underload T0.6 ≥/℃ | 1650 | 1600 | 1550 |
| Thermal Shock Resistances (1100℃, Water Cooling) ≥/times | 10 | 10 | 12 |
| Resistance to Abrasion at Ambient Temperature ≥/cm3 | 5 | ||
| Thermal Expansion/% | / | ||
1.High Temperature Stability
2.Excellent Fire Resistance
3.High Strength and Wear Resistance
4.Excellent Thermal Conductivity
5.Good Thermal Shock Stability
Mainly used for making non-ferrous metallurgical retorts, aluminum casting molds, electric furnace linings, aluminum electrolytic cell linings, ceramic kiln furniture and heat exchangers, etc.
Clay-bonded silicon carbide bricks are refractory products fired with silicon carbide as the main raw material and clay as the binder. It is characterized by high thermal conductivity, small thermal expansion coefficient, good thermal shock resistance and wear resistance, and is the earliest developed type of silicon carbide brick.
This product is used as kiln furniture for ceramic kiln (shelf board, bracket, sagger, etc.), muffle cover for muffle furnace, lining brick for aluminum refining furnace, retort tank for zinc distillation furnace, cooler for cement rotary kiln, etc.
Silicon nitride bonded silicon carbide brick is a refractory product made of SiC and Si powder and fired by nitriding. It is characterized by Si3N4 as the binding phase. Si3N4 exists between SiC grains in the form of acicular or fibrous crystals, and is an important new refractory material.
Silicon nitride combined with silicon carbide bricks are mainly used as the inner lining of the lower part of the blast furnace body, which is more than double the service life of traditional refractory materials. In addition, it can be used as the lining of the aluminum reduction electrolytic cell and ceramic kiln furniture, which has energy saving, improved service life, and It has the advantages of polluting the environment, and can also be used as a brick for the water-cooled pipe sleeve of the tuyere of a blast furnace.