板坯连铸过程结晶器角缝夹钢控制  

Control of mold corner infiltration breakouts during slab continuous casting

作　　者：梅宁[1] 刘延强[1] MEI Ning;LIU Yan-qiang(Shougang Jingtang Iron and Steel Co.»Ltd.,Tangshan 063200,Hebei,China)

机构地区：[1]首钢京唐钢铁联合有限责任公司,河北唐山063200

出　　处：《连铸》2020年第2期19-22,共4页Continuous Casting

基　　金：国家重点基础材料技术提升与产业化研发计划项目(2017YFB0304001)。

摘　　要：针对某钢厂板坯连铸过程中结晶器角缝夹钢导致非计划断浇和漏钢事故的问题,结合长期在现场持续跟踪测量的夹钢位置、长度、角缝等数据,从设备功能精度和工艺操作两方面分析了夹钢形成的具体原因,并对其形成规律进行了研究。研究结果表明:结晶器角缝夹钢通常会发生在铸机开浇和调宽的过程中,主要与设备功能精度和操作工艺有关,通过优化结晶器铜板性能、置换结晶器碟簧、优化结晶器调宽压力程序、改进开浇防溅板、增加中间包快换结晶器角缝打胶、制定结晶器铜板维护制度等措施,板坯连铸过程结晶器角缝夹钢发生率由2.5%降低至0.01%以下。In order to solve the problem of the unscheduled casting breakout caused by the corner infiltration breakouts in mold during slab continuous casting.According to the long-term data of position,length and the corner infiltration breakouts measured long-term continuously on site,the specific formation causes of the corner infiltration breakouts were analyzed from two aspects of equipment accuracy and process operation,and its formation law was studied.The results show that the corner infiltration breakouts usually occurs in the process of start casting and width adjustment,which is mainly related to the equipment accuracy and operation technology.By optimizing the performance of copper plate of mold,replacing the disc spring of mold,optimizing the pressure program of mold width adjustment,improving the protect plate during the start cast,adopting slica gel as sealing material in the process of tundish quick change,establishing the maintenance regulations for copper plate of the mold,the rate of the corner infiltration breakouts in the mold was reduced from 2.5%to less than 0.01%.

关 键 词：结晶器 角缝夹钢 调宽 中间包快换 

分 类 号：TF777.1[冶金工程—钢铁冶金]