Due to its low natural content, silicon carbide is mainly man-made.

Common method is to quartz sand mixed with coke, the use of silica and petroleum coke, add salt and wood chips, put in the furnace, high temperature heated to a temperature of about 2000 ° C, after all kinds of chemical process for silicon carbide powder.

SiC smelting blocks are usually made of quartz, petroleum coke and other raw materials, auxiliary recycled materials, spent materials, after grinding and other processes to become a reasonable proportion of reasonable size of the furnace charge (in order to adjust the air permeability of the furnace charge need to add the right amount of wood chips, green silicon carbide preparation also add the right amount of salt) after high temperature preparation.

In the above layers, the unreacted materials and part of the oxygen carborundum layer materials are usually collected as waste materials, and another part of the oxygen carborundum layer materials are collected together with amorphous materials, second grade products and part of the binder as the return furnace charge, while some of the adhesives with tight bond, high lumpiness and many impurities are discarded. The first grade becomes black or green SiC particles of various sizes after classification, coarse crushing, fine crushing, chemical treatment, drying and screening, magnetic separation. In order to make silicon carbide powder, it has to go through the process of water separation. To make silicon carbide products also go through the process of molding and sintering.