... abrasives, grinding of electronics, refractory, special ceramics, foam ceramics, modification of coating and plastics, auto parts, war industry and aviation, steelmaking, etc ... black silicon carbide is mainly used in steelmaking and ironmaking industry and refractory industry, such as stemming, trough material, silicon carbide brick and ... 60, 70, 80 and 90 can be customized. silicon carbide refractory