特种添加剂 meaning in English

special additive

Additions of carbon for improved slag resistance . spinel formation improves hot strength , slag resistance and brick joint erosion . 3 repairing material for bof uses fused magnesia or sintered magnesia as the main raw material and after modifid pitch and special additives are added , it has the following characteristcs than other conventional converter pitch temperature , shorter sintering time , longer service life and less pollution . it is mainly used for repairing converter working face , also for tapping side , tapping hole and bottom
3 ，转炉大面补料是采用电熔镁砂或烧结镁砂为主要原料，通过加入改性沥青和特种添加剂使它和传统沥青补炉料相比具有高温附着性好烧结时间短流动性好使用寿命长污染小等特点，主要用于修补转炉迎钢面通常称“大面”也可以用于修补出钢侧，出钢口及炉底等部位。