Silicon carbide refractories are advanced materials with high mechanical strength and thermal conductivity. They resist thermal shock and wear effectively. They also offer excellent resistance to alkali attack, slag corrosion, and oxidation. In addition, they can withstand certain molten metals.
These properties make them widely used in industries such as steel, non-ferrous metals, metallurgy, chemicals, and ceramics. They continue to show advantages that other refractory materials cannot match.
Steel Industry
Materials: Si₃N₄ and Sialon-bonded SiC, SiC-bonded SiC, and alumina–SiC composite products.
Applications: These materials are used in the lower shaft, belly, and bosh of blast furnaces. They are also used for tuyere blocks and sleeves, tap holes, iron runners, cupola linings, coke oven heads, reheating furnace skids, and tapping areas of converters and electric furnaces.
Performance: They offer excellent wear resistance at high temperatures. They resist slag and alkali corrosion. They provide high thermal conductivity. They also show strong resistance to oxidation and thermal shock.
Non-Ferrous Metals Industry
Materials: Oxide-bonded SiC, Si₃N₄-, Sialon-, Si₂N₂O-, and multiphase nitride-bonded SiC, as well as recrystallized SiC (R-SiC).
Applications: These materials serve as linings for aluminum electrolytic cells and aluminum refining furnaces. They are used in zinc distillation retorts and rectification column trays. They also work in ISP furnace condensers and rotors. In copper processing, they are used in the lower working lining of ASARCO furnaces and in holding furnace linings.
They are widely used for molten metal pipelines, transfer pumps, filters, and crucibles. They also serve in saggars for iron powder reduction, thermocouple protection tubes for aluminum and zinc melts, and ceramic riser tubes for aluminum casting.
Performance: They offer strong resistance to molten metal attack. They provide high strength and good oxidation resistance. They also resist chemical corrosion from cryolite and similar solutions. In addition, they deliver high thermal conductivity.
Ceramics
Materials: Oxide-bonded SiC, Si₃N₄-bonded SiC, Si₂N₂O-bonded SiC, composite nitride-bonded SiC, recrystallized SiC (R-SiC), reaction-sintered SiC (SiSiC)
Applications: Ceramic kiln muffles, kiln furniture (shelves, posts, rollers, supports, beams, setters, saggers, etc.), high-temperature burner nozzles, glass annealing furnace linings, enamel firing furnace linings, muffle furnace linings, cement rotary kiln clinker coolers, radiant heating tubes, cyclone separator linings
Key Properties: High strength at elevated temperatures, thermal shock resistance, high-temperature resistance, oxidation resistance
Metallurgy Industry
Materials: Oxide-bonded SiC and Si₃N₄-bonded SiC.
Applications: These materials are used as protective tubes for radiation pyrometers, thermocouples, and optical pyrometers. They also serve as impeller blades in mineral processing. In addition, they are used as linings for slurry pumps and as nozzles for hydrocyclones.
Performance: They provide high thermal conductivity. They resist thermal shock well. They perform reliably at high temperatures. They also offer strong corrosion resistance.
Chemical Industry
Materials: Oxide-bonded SiC, Si₃N₄-bonded SiC, Si₂N₂O-bonded SiC
Applications: Ammonia synthesis nitriding furnace linings, petroleum vaporizers, desulfurization furnace linings, organic waste incinerator linings, heat exchangers
Key Properties: Chemical corrosion resistance
Conclusion
Looking for high-performance silicon carbide refractory materials? Explore JHYRef product range:
- SiC Carbon Brick — For the hearth, walls, and columns of submerged arc furnaces. Learn More
- Alumina Silicon Carbide Brick — For transition and cooling zones of cement rotary kilns and lime kilns. Also suitable for non-ferrous metal smelting furnaces, waste incinerators, and fluidized bed boilers. Learn More
- SiC Low Cement Castable — Refractory lining for non-ferrous metal smelting furnaces, gas generators, and petrochemical cracking furnaces. Learn More
- Silicon Carbide Gunning Mix — For repairing and protecting linings in high-temperature industrial kilns and equipment. Learn More
