摘要
唐钢薄板坯连铸连轧线在2012年围绕提高连铸拉速对薄板坯连铸机进行工艺技术优化,优化后连铸工作拉速由原来的4 m/min以下提高到4.5~5.5 m/min,最高拉速可以达到6.0 m/min。为解决连铸拉速提高后铸坯质量缺陷增加的问题,对高拉速保护渣、浸入式水口、结晶器冷却方式和结晶器窄板进行技术优化研究。通过优化,连铸坯的裂纹缺陷率降至0.1%以下,表面夹渣缺陷率不高于0.03%,结晶器铜板寿命显著延长,漏钢率不高于0.1%,实现了高拉速下薄板坯连铸的稳定生产。
The technology optimization of high casting speed has been researched since 2012 for the thin slab continuous casting and rolling production line. After the optimization,the casting speed reaches to 4.0-5.5 m/min from 4.0 m/min,the limit value is 6.0 m/min. With the higher casting speed,the surface and internal defects increase. Through the development and the optimization of mold powder,entry nozzle,cooling models of mold and narrow plate,the rate of cracking defect is reduced to 0.1%,the defect rate of surface slag inclusion is reduced to 0.03%,the life of crystallizer copper plate is remarkably prolonged,steel leakage ratio is 0.1%,and TISCO achieves stable production in the low-carbon and the medium carbon sheet in high casting speed.
作者
杨晓江
YANG Xiao-jiang(National Engineeringand Research Center for Continuous Casting Technology, Central Iron and Steel Research Institute,Beijing 100081 ,China Technology Center ofHesteel Tangsteel,Tangshan 063016,Hebei,China)
出处
《连铸》
2016年第5期21-25,共5页
Continuous Casting
关键词
连铸
薄板坯
高拉速
continuous casting
thin slab
high speed
