钢包底吹氩系统优化与工业试验

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英文篇名：Bottom argon blowing system optimization and industrial tests 作者：张旭孝 ; 林路 英文作者：ZHANG Xuxiao;LIN Lu;Central Iron and Steel Research Institute;Metallurgical Technology Institute,Central Iron and Steel Research Institute; 关键词：钢包 ; 底吹氩 ; 夹杂物 ; 水模型 ; 工业试验 英文关键词：ladle;;bottom argon blowing;;inclusion;;water model;;industrial tests 中文刊名：LGZZ 英文刊名：Steelmaking 机构：钢铁研究总院;钢铁研究总院冶金工艺研究所; 出版日期：2019-03-29 16:03 出版单位：炼钢 年：2019 期：v.35;No.198 基金：国家重点研发计划专项资助项目(2017YFB0304000);; 国家自然科学基金资助项目(51704080,51874102) 语种：中文; 页：LGZZ201902005 页数：6 CN：02 ISSN：42-1265/TF 分类号：31-35+68

摘要

采用相似比为1∶3的水模型研究了某厂100 t钢包底吹氩位置及流量等因素对钢液混匀时间的影响,利用机油模拟钢渣,对不同钢包底吹位置及流量下钢液面裸露进行了比较,并利用数值模拟分析了不同透气砖位置对钢液流场的影响,找到最优的钢包底吹氩控制方式,并在现场进行了优化后工业试验。研究结果表明:合理的钢包底吹氩位置及控制工艺对夹杂物上浮去除有着重要作用,双孔夹角135°、吹气孔位于各自半径0.5R圆周上时混匀时间短且钢液面裸露面积小;同时在钢包底吹氩一定时间后,钢包内钢水全氧含量降低明显且没有增氮,铸坯中w(T.O)=(7～9)×10~(-6),明显低于优化前工艺铸坯w(T.O)水平(平均13×10~(-6)),全氧含量控制水平明显提高。
        A similar ratio of 1∶2 water model was used to study the influence of bottom argon blowing position and flow on mixing time in 100 t ladle.Machine oil was simulated as top slag to compare the area of steel exposed under different blowing position and flow,and numerical simulation was used to compare flow field behavior of molten steel under different blowing position,and find the optimal argon bottom blowing control mode for ladle.Furthermore,the test of optimized ladle was carried out in the steel plant.The results show that retaining a reasonable argon bottom blowing position and control technology have important influence on the floating removal of inclusion in the ladle.When argon blow holes are at the angle of 135,0.6R far to center of ladle,the mixing time is shorter and steel exposed is smaller.Meanwhile,after ladle bottom argon blowing for a certain time,the T.O content in the ladle was decreased obviously and the nitrogen content was not increased.The T.O mass fraction in slabs ranged from(7-9)×10~(-6),which was significantly lower than that in slabs before optimization(average 13×10~(-6)).The control of T.O content has improved significantly.

引文

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