极低碳钢RH生产工艺优化  

Optimization of RH produce technics for extra-low carbon steel

作　　者：杜善国[1] 王佳力[1] 冀建立 

机构地区：[1]首钢股份公司迁安钢铁公司,河北迁安064404

出　　处：《炼钢》2015年第2期5-8,共4页Steelmaking

摘　　要：结合理论和首钢股份公司迁安钢铁公司生产实践情况,根据RH脱碳原理和现场生产数据,将RH脱碳过程分为快速脱碳、慢速脱碳、脱碳基本停滞3个阶段,研究了真空压力、提升气体流量、吹氧及废钢合金加入时机、浸渍管插入深度、热弯管粘渣等因素对脱碳的影响,强调了RH真空设备功能精度管控的重要性,提出了预抽真空使用可大大提高脱碳速率,提升气体流量宜采用先低后高的控制模式,热弯管定期清渣可增加通道内径提高排气速率等。首钢股份公司迁安钢铁公司通过在极低碳钢生产过程中不断优化,极低碳钢的炼成率已从最初的不足50%提高到90%以上,平均RH结束钢水w(C)在0.001%以下。Combining theory and produce practice in Qian＇an Steel and basing on the principle of RH decarburization and production data, the decarhurization process was divided into three stages, rapid stage, slow stage and sluggish stage. The influence of vacuum pressure, lift gas flow rate, opportunity of oxygen blowing and scrape or alloy mixing, the immersion depth of snorkel, the stick slag on hot off-take on decarburization were researched. The importance of vacuum equipment accuracy control was emphasized. It is concluded that the forward vacuum process can increasing decarburization rate, the low-high control mode of lift gas flow rate are suitable, and exhausting rate in tube can be increased by cleaning slag in hot off-take regularly. After process optimization, the success rate of extra-low carbon was increased from 50% to more than 90% and average carbon mass fraction in steel at the end of RH treatment was controlled below 0. 001%.

关 键 词：RH真空精炼 极低碳钢 脱碳 

分 类 号：TF769.4[冶金工程—钢铁冶金]