电炉熔炼氢基直接还原铁的实验  

Experimental study on hydrogen-based direct reduced iron smelting by electric furnace

作　　者：李梦港 储满生[1,2,3,4] 唐珏 刘倬良[1,2,3] Li Menggangg;Chu Mansheng;Tang Jue;Liu Zhuoliang(School of Metallurgy,Northeastern University,Shenyang 110819,China;Liaoning Low-carbon Steelmaking Technology Engineering Research Center,Northeastern University,Shenyang 110819,China;Engineering Research Center of Frontier Technologies for Low-carbon Steelmaking(Ministry of Education),Shenyang 110819,China;State Key Laboratory of Rolling and Automation,Northeastern University,Shenyang 110819,China)

机构地区：[1]东北大学治金学院,沈阳110819 [2]辽宁省低碳钢铁前沿技术工程研究中心,沈阳110819 [3]低碳钢铁前沿技术教育部工程研究中心,沈阳110819 [4]东北大学轧制技术及连轧自动化国家重点实验室,沈阳110819

出　　处：《材料与冶金学报》2025年第2期122-130,共9页Journal of Materials and Metallurgy

基　　金：国家自然科学基金重点项目(U23A20608);辽宁省兴辽英才计划资助项目(XLYC1902118)。

摘　　要：通过模拟电炉冶炼氢基直接还原铁和废钢,考察了熔炼温度、熔炼时间、直接还原铁(direct reduced iron,DRI)配比和炉渣碱度对熔炼效果的影响.结果表明:当熔炼温度从1550℃升至1700℃时,铁收得率η(Fe)呈上升趋势,钢中w(TFe)先升高后降低,w[P]逐渐升高,而w[S]逐渐降低;当熔炼时间由3 min增至30 min时,η(Fe)略微下降,w(TFe)无明显变化,w[P]先升高后趋缓,w[S]逐渐降低;当DRI配比从10%增至40%时,η(Fe)和w(TFe)均呈缓慢上升趋势,w[P]逐渐降低,w[S]逐渐升高;当炉渣碱度从1.75增至2.75时,η(Fe)缓慢降低,w(TFe)先略微升高后降低,w[P]和w[S]均呈降低趋势;综合考虑可得最适宜条件为熔炼温度1600~1650℃、熔炼时间5~15 min、DRI配比30%、炉渣碱度2.5,此时可获得优质的钢水,其铁收得率η(Fe)超过94%,w(TFe)不低于99.8%,w[P]和w[S]均不超过0.018%.本研究结果可为电炉冶炼氢基直接还原铁提供参考与借鉴.By simulating the smelting of hydrogen-based direct reduced iron with an electric furnace,the effects of smelting temperature,smelting time,the proportion of hydrogen-based direct reduced iron(direct reduced iron,DRI)addition,and the basicity of the slag system on the smelting effect were investigated.The research shows that when the smelting temperature rises from 1550℃to 1700℃,the iron yieldη(Fe)shows an upward trend,the iron mass fraction w(TFe)in the steel first increases and then decreases,the phosphorus mass fraction w[P]in the steel gradually increases,while the sulfur mass fraction w[S]in the steel gradually decreases.When the smelting time increases from 3 min to 30 min,η(Fe)slightly decreases,w(TFe)shows no significant change,w[P]first rises and then gradually slows down,and w[S]decreases gradually.When the proportion of DRI addition increases from 10%to 40%,bothη(Fe)and w(TFe)show a slow upward trend,while w[P]gradually decreases and w[S]gradually increases.When the basicity increases from 1.75 to 2.75,η(Fe)decreases slowly,w(TFe)first slightly rises and then drops,and both w[P]and w[S]show a decreasing trend.Considering all factors comprehensively,the most suitable conditions are the smelting temperature of 1600~1650℃,smelting time of 5~15 min,DRI addition ratio of 30%,and slag basicity of 2.5.Under these conditions,high-quality molten steel can be obtained,withη(Fe)higher than 94%,w(TFe)no less than 99.8%,and both w[P]and w[S]no higher than 0.018%.The results of this study can provide reference and guidance for the electric furnace smelting of hydrogen-based direct reduced iron.

关 键 词：氢基直接还原铁 电炉 短流程 熔炼 铁收得率 

分 类 号：TF54[冶金工程—钢铁冶金]