电磁悬浮对Fe-0.22%C-0.54%Si-1.46%Mn钢精炼脱磷的影响

doi:10.13228/j.boyuan.issn0449-749x.20230033

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摘要为了探讨电磁悬浮精炼对钢中磷杂质去除的影响,以HRB600钢为研究对象,在电磁悬浮精炼条件下,研究了其对钢中磷杂质的去除效果。这种钢的基本化学成分为Fe-0.22%C-0.54%Si-1.46%Mn。相对于传统方法,电磁悬浮精炼技术采用超高频交变电流产生交变电磁场,依靠电磁场和感应电流之间相互作用形成的电磁力使金属熔体悬浮,具有避免坩埚污染、使材料内部成分均匀、高温快速熔炼等特点。采用电磁悬浮技术探索了电磁悬浮时间、温度及悬浮气氛对Fe-0.22%C-0.54%Si-1.46%Mn钢精炼过程中磷杂质去除及传质系数影响。研究表明,悬浮时间、悬浮温度及气氛流量对磷的脱除以及磷传质系数有影响,磷从熔体中挥发并被流动气体排出的过程为杂质元素磷从熔体边界层扩散到熔体表面。悬浮温度提高以及气氛流量增加有利于磷的脱除及磷的传质系数提高。悬浮时间延长,磷的脱除率提高,但磷的传质系数降低。当悬浮时间为45 min、悬浮温度为2 123 K、悬浮气氛流量为1.5 L/min时脱磷率最高,为40.561%;当悬浮时间为15 min、悬浮温度为1 923 K、悬浮气氛流量为1.0 L/min时,磷传质系数最高,为1.09×10^-6 m/s。

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	张培培
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关键词 ：电磁悬浮, Fe-0.22%C-0.54%Si-1.46%Mn钢, 脱磷, 传质系数, 精炼

Abstract：In order to explore the effect of electromagnetic levitation refining on the removal of phosphorus impurities in steel, HRB600 steel was taken as the research object, under the condition of electromagnetic levitation refining, the effect of removing phosphorus impurities was studied. The basic chemical composition of this steel is Fe-0.22%C-0.54%Si-1.46%Mn. Compared with traditional methods,electromagnetic levitation refining technology uses ultra-high frequency alternating current to generate alternating electromagnetic field,and relies on the electromagnetic force formed by the interaction between electromagnetic field and induced current to levitate the metal melt,which has the characteristics of avoiding crucible pollution,making the internal composition of the material uniform,and high temperature and rapid melting and so on, the effects of electromagnetic levitation time,temperature and levitation atmosphere on the removal of phosphorus impurities and mass transfer coefficient during the refining of Fe-0.22%C-0.54%Si-1.46%Mn steel were explored using electromagnetic levitation technology. The results show that levitation time,levitation temperature and atmosphere flow rate have effects on phosphorus removal and mass transfer coefficient. The process of phosphorus volatilization from melt and discharge by flowing gas is that impurity P diffuses from melt boundary layer to melt surface. The increase of levitation temperature and air flow rate is beneficial to phosphorus removal and mass transfer coefficient of phosphorus. With the extension of levitation time,the removal rate of phosphorus increases,but the mass transfer coefficient of phosphorus decreases. The highest dephosphorization rate was 40.561% at 45 mins levitation time,2 123 K levitation temperature,and 1.5 L/min,levitation atmosphere flow rate. The highest mass transfer coefficient of phosphorus was 1.09×10^-6 m/s at 15 mins levitation time,1 923 K levitation temperature,and 1.0 L/min levitation atmosphere flow rate.

Key words： electromagnetic levitation Fe-0.22%C-0.54%Si-1.46%Mn steel dephosphorization mass transfer coefficient refining

收稿日期: 2023-01-19

引用本文:

张培培, 张桂芳, 姜琦, 陈亮. 电磁悬浮对Fe-0.22%C-0.54%Si-1.46%Mn钢精炼脱磷的影响[J]. 钢铁, 2023, 58(7): 72-79. ZHANG Peipei, ZHANG Guifang, JIANG Qi, CHEN Liang. Effect of electromagnetic levitation on dephosphorization of Fe-0.22%C-0.54%Si-1.46%Mn steel during refining[J]. Iron and Steel, 2023, 58(7): 72-79.

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