高拉速下开浇板坯纵裂缺陷控制  

Control of Longitudinal Crack Defects of Cast-in Slab at High Speed

作　　者：任志鑫 李洪波 刘晓利 REN Zhi-xin;LI Hong-bo;LIU Xiao-li(Shanxi Jianlong Industrial Co.Ltd.,Yuncheng 043800,China)

机构地区：[1]山西建龙实业有限公司,山西运城043800

出　　处：《甘肃冶金》2021年第5期56-58,共3页Gansu Metallurgy

摘　　要：详细从设备、工艺及操作等方面开展攻关来解决板坯开浇及热换炉次上表面纵裂问题。实践表明通过优化浸入式水口设计、改变结晶器一冷水流量,提高结晶器水温度,控制碳含量、降低钢水P、S及夹杂、保证足够的液渣层厚度等可以有效解决高拉速板坯开浇表面纵裂问题。This article carries out practice from the aspects of equipment, process and operation to tackle the problem of vertical cracking of the upper surface of the slab pouring and heat exchange furnace. Practice has shown that by changing the design of the immersion nozzle, changing the flow of cold water in the mold, controlling the carbon content, reducing the P, S and inclusions of the molten steel, ensuring sufficient thickness of the liquid slag layer, etc., the vertical cracks on the surface of the high-speed slab can be effectively solved problem quality.

关 键 词：一冷水优化 水口 液渣 保护渣 

分 类 号：TF777.1[冶金工程—钢铁冶金]