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结合浸入式水口堵塞物的分析,从钢水成分、顶渣、温度、精炼工艺、喂钙、连铸吹氩等多个方面,研究了中碳低硅铝镇静钢3种不同精炼工艺连铸浸入式水口堵塞成因。确定浸入式水口堵塞的主要原因有:水口吹气流量低不利于防止水口堵塞,顶渣氧化性强,加Al和上浮控制操作不规范,钙处理变性效果差,塞棒、板间、水口吹氩压力低。提出了适用于工业化生产的技术措施,工艺过程控制参数优化后,连浇炉数达到12炉以上。
Combined with the analysis of submerged nozzle blockage, three kinds of different refining processes of medium carbon low silicon aluminum killed steel were studied by several factors, including molten steel composition, top slag, temperature, refining process, calcium feeding and continuous casting argon blowing. Type nozzle plugging causes. The main reasons to determine the blockage of submerged entry nozzle are as follows: the low flow rate of the nozzle is not conducive to preventing the blockage of the nozzle, the top slag has strong oxidizing property, the control operation with Al and floating is not normal, the degeneration effect of calcium treatment is poor, the stopper rod, Low argon pressure. The technical measures suitable for industrialized production are put forward. After the control parameters of the process are optimized, the number of continuous casting furnaces reaches over 12 furnaces.