Silicon carbide, black, metallurgical
Silicon carbide is mainly smelted using the Acheson process. It is a chemical compound of silicon and carbon. The raw materials used to produce it are selected petroleum coke, high-quality quartz and wood shavings, which are coated around a carbon core. Graphite electrodes are attached to the carbon core. The high electric voltage causes temperatures of over 2,000 °C, through which the mixture melts - and silicon carbide is formed.
Different qualities are obtained by means of careful separation of the molten SiC roller. The SiC content reduces with increasing distance from the core.