FeO、Al_2O_3和MgO质量分数对高炉初渣黏度的影响
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摘要
以涟钢7号高炉软熔带炉料滴落形成的初渣为研究对象进行化学成分分析,采用分析纯试剂制备高炉炉渣渣样,探究CaO-SiO_2-MgO-Al_2O_3-FeO五元渣系中,w(FeO)为3%～8%、w(Al_2O_3)为9%～13%及w(MgO)为2%～6%对涟钢7号高炉初渣黏度和熔化性温度的影响规律。结果表明,在碱度为1.373时,炉渣黏度随FeO质量分数的增加而减小,且FeO质量分数越大,炉渣的熔化性温度越低;当w(MgO)为7.38%、w(FeO)为5%时,炉渣黏度和熔化性温度都随着Al_2O_3质量分数的增加而减小;当w(Al_2O_3)为10.95%、w(FeO)为5%时,随着MgO质量分数的增加,炉渣黏度和熔化性温度都呈现降低趋势。
Taking the primary slag formed by the dropping of the burden in the soft-melting zone of the No.7 blast furnace of Liansteel as the research object,the chemical composition analysis was carried out,and the blast furnace slag sample was prepared by using the analytical pure reagent.The influence of the mass fraction of FeO(3%-8%),Al_2O_3(9%-13%)and MgO(2%-6%)in CaO-SiO_2-MgO-Al_2O_3-FeO five-component slag system on the initial slag viscosity and melting temperature was explored.The experimental results showed that the viscosity of slag decreased with the increase of FeO mass fraction and the higher the FeO mass fraction,the lower the melting temperature of slag at a binary basicity of 1.373.When the mass fraction of MgO and FeO was 7.38%and 5%,respectively,the slag viscosity and melting temperature decreased with the increase of Al_2O_3 mass fraction.When the mass fraction of Al_2O_3 and FeO was 10.95%and 5%,respectively,the slag viscosity and melting temperature showed a decreasing trend with the increase of MgO mass fraction.
Taking the primary slag formed by the dropping of the burden in the soft-melting zone of the No.7 blast furnace of Liansteel as the research object,the chemical composition analysis was carried out,and the blast furnace slag sample was prepared by using the analytical pure reagent.The influence of the mass fraction of FeO(3%-8%),Al_2O_3(9%-13%)and MgO(2%-6%)in CaO-SiO_2-MgO-Al_2O_3-FeO five-component slag system on the initial slag viscosity and melting temperature was explored.The experimental results showed that the viscosity of slag decreased with the increase of FeO mass fraction and the higher the FeO mass fraction,the lower the melting temperature of slag at a binary basicity of 1.373.When the mass fraction of MgO and FeO was 7.38%and 5%,respectively,the slag viscosity and melting temperature decreased with the increase of Al_2O_3 mass fraction.When the mass fraction of Al_2O_3 and FeO was 10.95%and 5%,respectively,the slag viscosity and melting temperature showed a decreasing trend with the increase of MgO mass fraction.
引文
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[2]李维国.21世纪以来中国炼铁技术发展的回顾和展望[J].中国冶金,2012,22(11):4.
[3]杨润德,侯晓川,李贺.MgO含量对高炉渣性质影响的理论解析[J].矿冶工程,2014,34(6):60.
[4]常治宇,张建良,宁晓钧,等.MgO对低铝渣流动性的影响机理及热力学分析[J].钢铁,2018,53(7):10.
[5]常治宇,张建良,许仁泽,等.Al2O3对酒钢低铝渣黏度的影响及热力学分析[J].中国冶金,2018,28(8):6.
[6]王冬青,马泽军,陈辉,等.首钢A高炉炉渣降低MgO的热力学分析[J].中国冶金,2018,28(10):5.
[7]刘田,李廷乐,孙长余,等.FeO和Al2O3质量分数对高炉初渣粘度的影响[J].辽宁科技大学学报,2017,40(2):81.
[8]JIAO Ke-xin,ZHANG Jian-liang,WANG Zhi-yu,et al.Effect of TiO2and FeO on the viscosity and structure of blast furnace primary slags[J].Steel Research International,2017,88(5):1002.
[9]田彦文,翟秀静,刘奎任.冶金物理化学简明教程[M].北京:化学工业出版社,2011.
[10]胡夏雨,林李全,李辽沙.高Al2O3炉渣性能的研究[J].中国冶金,2006,16(2):36.
[11]韩晓东,车玉满.应用相图理论指导高炉确定合理造渣制度[J].四川冶金,2013,35(3):8.
[12]何环宇,王庆祥,韩秋影.MgO含量对高炉渣性能的影响研究[J].武汉科技大学学报:自然科学版,2006(1):5.
[13]刘杰,赵东明,李建军,等.鞍钢高炉低镁渣冶炼技术研究与应用[J].钢铁,2018,53(3):22.