CSP连铸浸入式水口结瘤案例研究  

Case Study of Submerged Entry Nozzle Clogging on CSP Line

作　　者：高海潮[1] 刘茂林[1] 张良明[1] 闫华[2] 王虎金[2] 

机构地区：[1]马鞍山钢铁股份有限公司生产部,安徽马鞍山243000 [2]马鞍山钢铁股份有限公司板带部,安徽马鞍山243000

出　　处：《钢铁》2005年第11期21-23,26,共4页Iron and Steel

摘　　要：研究了CSP连铸浸入式水口结瘤两种案例。案例曲线表明,塞棒开度和结晶器液面波动是钢水浇铸过程中最重要的特征参数。薄板坯连铸铝镇静钢中间包水口结瘤是高熔点夹杂在水口内壁的聚集。生产不稳,积压钢水在LF多次处理,产生细小的高熔点夹杂难以去除;软吹钢水“露眼”和开浇烧氧再生高熔点夹杂来不及去除都会导致水口结瘤。钙处理主要是球化夹杂,改善钢水可浇性。即使Ca/Als(钙/酸溶铝)和Ca/Alin(钙/酸不溶铝)都合适,夹杂物绝对量大,钢水可浇性仍较差,水口容易结瘤。Two cases were studied on submerged entry nozzle clogging on CSP line. The results showed that the stopper position and steel level fluctuation are the most important characteristic parameters during casting and can reflect the liquid steel quality. The main reason of nozzle clogging is aggregation of high melting inclusions. It is very difficult to remove the small inclusions produced by repeated treatment of liquid steel in ladle furnace because of unstable production. The removal time is not enough to remove large particles produced by blowing “eye” and the lanced open. Calcium treatment modifies inclusions and improves liquid steel castability. When the amount of inclusions is large, liquid steel castability is still very bad after Ca treatment and submerged entry nozzle clogging is still easy to happen even Ca/Als and Ca/Alin （Ca/acid undissolved Al） are suitable.

关 键 词：浸入式水口 结瘤 案例分析 

分 类 号：TF777[冶金工程—钢铁冶金]