High Purity Refractory Silicon Carbide Bricks SiC brick for High Temperature Furnace use

Silicon nitride bonded silicon carbide brick
Silicon nitride bonded silicon carbide brick is a refractory product made by nitriding and firing using SiC and Si powder as raw materials. Its characteristic is Si3N4 as the binding phase. Si3N4 exists between SiC crystal grains as needle-like or fibrous crystals, and is an important new refractory material.
Using the principle of reaction sintering, the SiC green body containing silicon powder is sintered by the nitridation reaction, and the firing process is completed in a closed furnace with nitrogen gas and easy control. The temperature, pressure and atmosphere in the furnace must be strictly controlled. Main process parameters: nitriding gas pressure 0.02~0.04MPa, furnace atmosphere containing O2 less than 0.01%, final nitriding temperature 1350~1450℃, total nitriding time varies with product shape and size.
Silicon nitride bonded silicon carbide bricks have good alkali corrosion resistance, molten cryolite wettability, oxidation resistance, wear resistance, high thermal conductivity, thermal shock resistance and extremely low electrical conductivity.
Silicon nitride combined with silicon carbide bricks are mainly used as the lining of the lower furnace body of the blast furnace, which is more than twice as long as using traditional refractory materials. In addition, it can be used as the lining of aluminum reduction electrolytic cells and ceramic kiln furniture. It can also be used as a blast furnace tuyere water-cooled pipe sleeve brick because of its advantages such as environmental pollution.

Silicon carbide Plates have high thermal conductivity, good wear resistance, thermal shock resistance, and corrosion resistance. Therefore, silicon carbide bricks are widely used in industry. It can be used for metallurgical steel cylinder lining, nozzle, plug, blast furnace bottom and hearth, heating furnace without water-cooled slide rail; non-ferrous metal smelting distiller, distillation tower tray, electrolytic tank side wall, smelting metal crucible; silicic acid Sheds and muffle materials for kilns in the salt industry; oil and gas generators and organic waste combustion furnaces in the chemical industry; kiln furniture for high-tech ceramics; aluminum electrolytic cell linings, molten aluminum pipes and kiln furniture for ceramic kilns, large and medium-sized blast furnaces Lower body, furnace waist and belly, aluminum refining furnace lining, zinc distillation tank lining, etc.
The formula of coarse, medium and fine SiC should be 5:1:4. The raw material for making silicon carbide bricks is generally black SiC. Its chemical composition is as follows: SiC 98.0%, free C 0.5%, Fe 0.2%, and free SiO2 0.6%.

Physical and Chemical Indicators Of Silicon Carbide Refractory Brick :

Certificates

• ISO9001
• ISO14001
• ISO50001
• ISO45001
• Relevant patent certificates

Packing Details

The bricks are packed on wooden pallet with papers in each layer and PP film wrapped outside of the whole pallet.