浅析中金公司板坯脱方的成因与控制策略  

An Analysis of the Causes and Control Strategies of Slabs Falling off Square at China International Capital Corporation

作　　者：靳猛 胡中 杜国利 王伦 郑礼明 Meng Jin;Zhong Hu;Guoi Du;Lun Wang;Liming Zheng(Guangxi Liugang Zhongjin Stainless Steel Co.,Ltd.,Yulin,Guangxi 537624)

机构地区：[1]广西柳钢中金不锈钢有限公司,广西玉林537624

出　　处：《新疆钢铁》2024年第2期125-127,共3页Xinjiang Iron and Steel

摘　　要：脱方又称菱变,是指连铸方坯和矩形坯4个角不成直角,铸坯断面形状变为平行四边形、梯形或菱形。目前,脱方缺陷对于小方坯影响较大,常伴随对角线裂纹出现,导致铸坯内部组织结构强度变差,甚至引发漏钢事故。此外,脱方还会造成加热炉内堆钢困难,不易咬入轧机孔型,易出现倒钢现象,一定程度上影响了铸坯合格率和轧钢成材率。一般认为,结晶器和二冷段前区冷却不均匀是脱方的主要原因,如结晶器磨损严重、振动偏摆、二冷喷淋管偏斜、喷嘴堵塞等都可能是其诱因。然而,针对矩形坯脱方问题的研究较少,因此,本文从工艺、设备、操作等方面进行了分析,提出预防矩形坯脱方问题的相关策略,以期减少脱方缺陷对生产造成的影响。Tiaofang,also known as rhombic transformation,refers to the transformation of the cross-sectional shape of the con-tinuous casting billet into a parallelogram,trapezoid,or rhombic shape when the four corners of the billet are not at right angles.At present,the detachment defect has a significant impact on the small billet,often accompanied by diagonal cracks,resulting in a decrease in the strength of the internal structure of the billet,and even leading to steel leakage accidents.In addition,detachment can also cause difficulties in stacking steel in the heating furnace,making it difficult to bite into the rolling mill hole and prone to steel pouring,which to some extent affects the qualification rate of the casting billet and the yield rate of the rolled steel.It is generally believed that uneven cooling in the front area of the crystallizer and secondary cooling section is the main reason for the detachment,such as severe wear of the crystallizer,vibration deviation,deviation of the secondary cooling spray pipe,nozzle blockage,etc.,which may all be its inducing factors.However,there is relatively little research on the problem of square deviation in rectangular billets.Therefore,this article analyzes the process,equipment,and operation as-pects,and proposes relevant strategies to prevent square deviation in rectangular billets,in order to reduce the impact of square deviation defects on production.

关 键 词：板坯 脱方 冷却不均 

分 类 号：TF747[冶金工程—钢铁冶金]