Black Silicon carbide refractory

Black Silicon carbide is an extreme hard carborundum, it is produced at high temperature in an electric resistance type furnace with quarts sand and petroleum coke.

Silicon Carbide is produced by a process involving the electrochemical reaction of silica(SiO2) – in the form of quartz  mixed with Carbon(C) in the form of raw petroleum coke. The stoichiometric mixture is reacted in an electrical resistance furnace at a temperature up to 2500℃ to yield high quality crystals. The process is large furnace technology with a graphite electrode in the furnace center.  The large crystals are then segregated, crushed, cleaned of magnetic impurities in high intensity magnetic separators and classified into narrow size fractions to suit the end use. Dedicated lines produce products for different applications.

Properties:

High hardness, retaining hardness and strength at high temperature.

High wear resistance.

Excellent thermal shock resistance with high thermal conductivity and low linear thermal expansion.

Good ability to withstand the strongest alkalis and acids.

·         low density

·         low thermal expansion, oxidation resistance

·         excellent chemical resistance

·         high thermal shock resistance

·         high wear and hardness resistance

·         high strength, high temperature resistance

·         high temperature strength

Comparing with Silicon & carbon powder, Silicon carbide has exordinary Deoxidation features, higher refractoriness as Deoxidizer in metallurgy industry. It can also speed up the Deoxygenation process, increase Silicon & Carbon and decrease impurities in alloy, make better flow ability of steel liquid. So get a higher efficiency and save cost in a whole.

Applications:

Refractory, Furnace Burden, Casting, Ramming Compound, Refractory Bricks etc

Kiln furniture

Metallurgical:85% SiC is good deoxidant to increase speed of steel making.