Causes and Control of Slag Inclusion Defects on Continuous Casting Slab Surface
Author of the article:ZHAO Jianping;LYO Haifu;WANG Shuai;LU Xing
Author's Workplace：Tangshan Iron&Steel Group Co.,Ltd.,Tangshan 063000,China
Key Words：slab continuous casting machine slag inclusion slag inclusion rate
Abstract：
The causes of slag inclusion defects on slab surface produced by continuous casting were studied.The results show that the slag inclusion defects are mainly caused by mould slag entrainment during continuous casting.By adopting to prevent the nozzle surface oxidation,reduce mold level fluctuation and prevent the submerged nozzle clogging,choose reasonable nozzle immersion depth,optimization of protecting slag and covering agent performance,reasonable control of drawing speed,reduce the crystallizer amplitude,choosing the right and the optimization of the worker of the crystallizer water measures,eventually make slag rate from 3.9% to 1.5%,achieve good control effect.
