Research and practice of the slab casting mould level fluctuation
MA E1,LU Xian-hui2, LIU Hong-yan2
1. Hebei Iron and Steel Technology Research Institute, Shijiazhuang 052165, Hebei, China 2. Handan Iron and Steel Co., Ltd.,Hebei Steel and Iron Group,Handan 056015, Hebei,China
Abstract:Since 2013,variety steel’s production of He Steel Hanbao company steelmaking plant is increased, but the problems that the casting mould level fluctuation causes quality problems occur occasionally. In this paper, the author found out the different types of mould level fluctuation and its characteristic curve through on-site tracking. According to the liquid level fluctuation causes, the corresponding optimization measures were taken. Through the technical research, notable results were achieved. (1) Fluctuation meniscus?furnace?ratio?was lowered from 9.63%?to 3.47%; (2) For ultra-low carbon steel, SEN nozzle replacement ratio due to the fluctuation of meniscus was reduced from?16.67% to 6.67%; (3)The level of fluctuation of the liquid level control was improved, the severity and frequency of the surface wave was reduced, and the quality of products was enhanced.
马 娥,鲁献辉,刘红艳. 板坯连铸结晶器液位波动研究及控制实践[J]. 中国钢铁期刊网, 2015, 34(4): 35-39.
MA E,LU Xian-hui, LIU Hong-yan. Research and practice of the slab casting mould level fluctuation. Chinese Journal of Iron and Steel, 2015, 34(4): 35-39.