Normally, silicon carbide is produced by heating sand (which is made of quartz, or silicon dioxide) in an electric furnace with carbon made from oil or coal.

Using fired bauxite and silicon carbide as main material, adding suitable amount of carbon based material, binder and other additive, the gunning mix for trough of blast furnace was developed.

The chemical quality, electric characters of silicon carbide, and the application in the holding furnace of molten aluminium are mainly introduced in this article.