萍钢渣洗与LF精炼深脱硫工艺应用研究
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摘要
以优化萍钢渣洗+LF精炼深脱硫工艺为立题依据,研究渣洗+LF精炼脱硫工艺达到最佳脱硫效果的条件,实现LF精炼与生产周期短的转炉一对一相匹配,进而减轻高炉、转炉冶炼负担,优化整个钢铁生产工艺流程,以适应现代工业技术对钢材质量越来越高的要求。
通过实际生产,研究了渣洗、LF精炼脱硫工艺参数:初始硫含量、熔渣成分、渣量、吹气搅拌等并结合萍钢实际情况分析了对脱硫效率的影响。
生产实践表明,对各钢种采用合成渣洗均能得到较好的脱硫效果,脱硫率可达20~30%;中碳钢在相同条件下,脱硫率高于低碳钢。合成渣使用前采用了预热手段,确保水分小于0.5%,不会导致钢水增氢。经过合成渣洗后,为精炼造白渣操作快速脱硫奠定了基础。,在优化工艺条件下,LF精炼在平均通电时间17分钟、精炼周期35分钟的较短时间内,脱硫率稳定在75%以上的水平,精炼后钢中硫含量平均为0.009%,最低硫可以脱至0.001%。实现LF精炼与生产周期短的转炉一对一相匹配。
通过对渣洗+LF精炼深脱硫工艺应用的研究,实现建立起萍钢自己高效率、低成本“洁净钢平台”经济地生产出低硫高品质品种钢,对萍钢的可持续发展具有积极的现实意义。
Optimizing the deep desulfurization process of the slag washing and LF furnace refining in Pingxiang Steel plant is studied , and the best conditions of desulfurization in the process is investigated to make LF furnace refining and converter matching, and to reduce the burden of blast furnace and converter,and to optimize the entire steel production process,and to adapt to the growing demands of modern industrial technology to steel quality.
Through the actual production of the slag washing + LF Refining desulfurization, the effect of the process parameters such as the initial content of sulfur, component and amount of slag, and stirring by blowing gas on the efficiency is studied.The results show that the desulfurization effect was obtained to adopt to slag washing for steels. The desulfurization rate is up to 20~30%.Under the same conditions,the desulfurization rate of medium-carbon steel is lower than that of the low-carbon steel.
The water in the synthetic slag is less than 0.5% by preheating,and as will not lead more hydrogen to the molten steel.The process of slag washing established the base of rapid desulfurization for white slag refining operations.Under the optimal conditions, the average electrifing time of LF refining is 17 minutes and the desulfurization rate is up to 75% steadily in 35 minutes refining period, and the average sulfur content of refined steel is 0.009%, the lowest sulfur can be down to 0.001%. Finally it achieves LF refining and converter matching.
Through the study of the application of the process of slag washing + LF refining slag deep desulfurization, the high efficiency and low cost of "clean steel platform"was builded for Pingxiang steel plant, the low-sulfur and high quality steel was produced economically. It was a positive significance to the sustainable development of Pingxiang steel plant.
通过实际生产,研究了渣洗、LF精炼脱硫工艺参数:初始硫含量、熔渣成分、渣量、吹气搅拌等并结合萍钢实际情况分析了对脱硫效率的影响。
生产实践表明,对各钢种采用合成渣洗均能得到较好的脱硫效果,脱硫率可达20~30%;中碳钢在相同条件下,脱硫率高于低碳钢。合成渣使用前采用了预热手段,确保水分小于0.5%,不会导致钢水增氢。经过合成渣洗后,为精炼造白渣操作快速脱硫奠定了基础。,在优化工艺条件下,LF精炼在平均通电时间17分钟、精炼周期35分钟的较短时间内,脱硫率稳定在75%以上的水平,精炼后钢中硫含量平均为0.009%,最低硫可以脱至0.001%。实现LF精炼与生产周期短的转炉一对一相匹配。
通过对渣洗+LF精炼深脱硫工艺应用的研究,实现建立起萍钢自己高效率、低成本“洁净钢平台”经济地生产出低硫高品质品种钢,对萍钢的可持续发展具有积极的现实意义。
Optimizing the deep desulfurization process of the slag washing and LF furnace refining in Pingxiang Steel plant is studied , and the best conditions of desulfurization in the process is investigated to make LF furnace refining and converter matching, and to reduce the burden of blast furnace and converter,and to optimize the entire steel production process,and to adapt to the growing demands of modern industrial technology to steel quality.
Through the actual production of the slag washing + LF Refining desulfurization, the effect of the process parameters such as the initial content of sulfur, component and amount of slag, and stirring by blowing gas on the efficiency is studied.The results show that the desulfurization effect was obtained to adopt to slag washing for steels. The desulfurization rate is up to 20~30%.Under the same conditions,the desulfurization rate of medium-carbon steel is lower than that of the low-carbon steel.
The water in the synthetic slag is less than 0.5% by preheating,and as will not lead more hydrogen to the molten steel.The process of slag washing established the base of rapid desulfurization for white slag refining operations.Under the optimal conditions, the average electrifing time of LF refining is 17 minutes and the desulfurization rate is up to 75% steadily in 35 minutes refining period, and the average sulfur content of refined steel is 0.009%, the lowest sulfur can be down to 0.001%. Finally it achieves LF refining and converter matching.
Through the study of the application of the process of slag washing + LF refining slag deep desulfurization, the high efficiency and low cost of "clean steel platform"was builded for Pingxiang steel plant, the low-sulfur and high quality steel was produced economically. It was a positive significance to the sustainable development of Pingxiang steel plant.
引文
[1]殷瑞钰.合理选择二次精炼技术,推进高效率低成本“洁净钢平台”建设.炼钢,2010(1): 1~6.
[2]殷瑞钰.合理选择二次精炼技术,推进高效率低成本“洁净钢平台”建设.炼钢,2010(1): 1~6.
[3]冯捷,张红文.炼钢基础知识.北京:冶金工业出版社,2005
[4]王雅贞,李承祚等.转炉炼钢问答.北京:冶金工业出版社,2007
[5]蔡开科.纯净钢生产技术及现状.河南冶金,2003(3)
[6]史晓蓉.铁水预处理在钢铁生产中的作用.钢铁技术,2003
[7]常旭.近几年我国铁水脱硫预处理的发展及应用.炼钢,2006 (5)
[8]赵沛.炉外精炼及铁水预处理实用技术手册.北京:冶金工业出版社,2004
[9]陈林权,田伟达,邹永龙.杭钢二次精炼的选择及实践.设计技术,2007(1): 11~15.
[10] Teoh L L.采用二次炼钢提高产品质量.国外钢铁,1996(4):21~27.
[11]蔡开科.钢铁冶金学(炼钢部分).北京:冶金工业出版社,1990:270
[12] B.A,库德林等著,董学经等译.优质钢冶炼.北京:冶金工业出版社,1987:115~124
[13]马杰.BaO,CaO钢液脱硫的试验研究与分析[J].上海金属,1998(1):40
[14]黄志勇等.含BaO渣系“渣洗"脱硫工艺的试验研究,山东冶金,2008(6):48~50
[15]曲英.炼钢学原理[M],北京:冶金工业出版社,1983:87~103
[16]徐曾启.炉外精炼[M],北京:冶金工业出版社,1998:13~26
[17]欧阳守忠.钢包吹氩技术在武钢的应用与改进,炼钢,1998(6)
[18]马郁文,石文光.70t钢包底吹氩的冶金效果,钢铁研究,1989(2)
[19]骆忠汉.武钢二炼钢提高钢包底吹氩吹成率的实践,炼钢,1996(4)
[20] Koo Y S,Kang T,Lee I R,Shin Y K,et al.Thermalcycle model of ladle for steel temperature control in melt and its application.In:1989 Steelmaking Conference Proceedings,1989:415~420
[21]徐曾启.炉外精炼,北京:冶金工业出版社,1998
[22]刘炳宇,刘昆华.转炉—连铸工艺生产重轨钢的实践,第十二届全国炼钢学术会议论文集.中国金属学会炼钢专业委员会.2002.上海
[23] Morikawa E,SaKai K.钢包处理工艺的新近发展.Steel Times,1993
[24]李晶,傅杰,张志诚.LF精炼过程中喂线速度的计算.特殊钢,2001;22(2)
[25]炉外精炼工艺研究报告.上海钢研所,1998(内部资料)
[26]蒋国昌.纯净钢及二次精炼.上海:上海科学技术出版社,1994
[27]傅杰,王平.发展我国钢的二次精炼技术的建议.特殊钢,1999,20(4),增刊:43
[28] Sovobo J M,Daridson.Development of a DC plasma ladlefurnace for foundary application.Iron and Steelmaker,1993,20(3):14~15
[29] Stolte G.MPT冶金设备和技术(中文版),1995: 42
[30] Dunholter D A.Iron and steel Engineer,1997,74(12):49
[31] Saonways N L.Iron and steel Engineer,1998,75(5):19
[32] Legam L A L.Iron and steel Engineer,1997,74(4):27
[33] Saonways N L.Iron and steel Engineer,1998,75(3):21
[34]张鉴.炉外精炼的理论与实践.北京:冶金工业出版社,1999:520
[35]Dufy J A,Ingram M D,Sommerville I D.Acid—BasedProperties of Molten Oxides and Metallurgical slags[J].Journal of the Chemist~ societyFarady Tram,1978,74(6):1410~1419.
[36]Dufy J A.Optical Basieity of Flouride ContainingSla [J],Iron making and Steelmaking, 1990,17(6):1410一1419
[37]Sosinsky D.J.’Sommerville I.D.,The composition and temperature dependence of the sulfide capaeity of metall~oeM slags[J].Metal Trans,1996,17B(2):331—337.
[38]姜周华.洁净钢炉外精炼技术[c].深圳:洁净钢生产技术高级研讨会,2006.12:113~ 118
[39]Duffy J A 0ptical basicity of fluoried containing slag[J].Ironmaking and Steelmaking, 1990,17(6):410.
[40]Young RW,Dully JA。Hassall GJ,et a1.Use of opticalbasicity concept for determining pbosphorus and sulphurslag-metal partitions[J].Imnmaking and Steelmaking,1992,119(3): 201-219.
[41]梁约军.氧气顶吹转炉炼钢脱硫的理论与实践.世界金属导报,2007-07-05.
[2]殷瑞钰.合理选择二次精炼技术,推进高效率低成本“洁净钢平台”建设.炼钢,2010(1): 1~6.
[3]冯捷,张红文.炼钢基础知识.北京:冶金工业出版社,2005
[4]王雅贞,李承祚等.转炉炼钢问答.北京:冶金工业出版社,2007
[5]蔡开科.纯净钢生产技术及现状.河南冶金,2003(3)
[6]史晓蓉.铁水预处理在钢铁生产中的作用.钢铁技术,2003
[7]常旭.近几年我国铁水脱硫预处理的发展及应用.炼钢,2006 (5)
[8]赵沛.炉外精炼及铁水预处理实用技术手册.北京:冶金工业出版社,2004
[9]陈林权,田伟达,邹永龙.杭钢二次精炼的选择及实践.设计技术,2007(1): 11~15.
[10] Teoh L L.采用二次炼钢提高产品质量.国外钢铁,1996(4):21~27.
[11]蔡开科.钢铁冶金学(炼钢部分).北京:冶金工业出版社,1990:270
[12] B.A,库德林等著,董学经等译.优质钢冶炼.北京:冶金工业出版社,1987:115~124
[13]马杰.BaO,CaO钢液脱硫的试验研究与分析[J].上海金属,1998(1):40
[14]黄志勇等.含BaO渣系“渣洗"脱硫工艺的试验研究,山东冶金,2008(6):48~50
[15]曲英.炼钢学原理[M],北京:冶金工业出版社,1983:87~103
[16]徐曾启.炉外精炼[M],北京:冶金工业出版社,1998:13~26
[17]欧阳守忠.钢包吹氩技术在武钢的应用与改进,炼钢,1998(6)
[18]马郁文,石文光.70t钢包底吹氩的冶金效果,钢铁研究,1989(2)
[19]骆忠汉.武钢二炼钢提高钢包底吹氩吹成率的实践,炼钢,1996(4)
[20] Koo Y S,Kang T,Lee I R,Shin Y K,et al.Thermalcycle model of ladle for steel temperature control in melt and its application.In:1989 Steelmaking Conference Proceedings,1989:415~420
[21]徐曾启.炉外精炼,北京:冶金工业出版社,1998
[22]刘炳宇,刘昆华.转炉—连铸工艺生产重轨钢的实践,第十二届全国炼钢学术会议论文集.中国金属学会炼钢专业委员会.2002.上海
[23] Morikawa E,SaKai K.钢包处理工艺的新近发展.Steel Times,1993
[24]李晶,傅杰,张志诚.LF精炼过程中喂线速度的计算.特殊钢,2001;22(2)
[25]炉外精炼工艺研究报告.上海钢研所,1998(内部资料)
[26]蒋国昌.纯净钢及二次精炼.上海:上海科学技术出版社,1994
[27]傅杰,王平.发展我国钢的二次精炼技术的建议.特殊钢,1999,20(4),增刊:43
[28] Sovobo J M,Daridson.Development of a DC plasma ladlefurnace for foundary application.Iron and Steelmaker,1993,20(3):14~15
[29] Stolte G.MPT冶金设备和技术(中文版),1995: 42
[30] Dunholter D A.Iron and steel Engineer,1997,74(12):49
[31] Saonways N L.Iron and steel Engineer,1998,75(5):19
[32] Legam L A L.Iron and steel Engineer,1997,74(4):27
[33] Saonways N L.Iron and steel Engineer,1998,75(3):21
[34]张鉴.炉外精炼的理论与实践.北京:冶金工业出版社,1999:520
[35]Dufy J A,Ingram M D,Sommerville I D.Acid—BasedProperties of Molten Oxides and Metallurgical slags[J].Journal of the Chemist~ societyFarady Tram,1978,74(6):1410~1419.
[36]Dufy J A.Optical Basieity of Flouride ContainingSla [J],Iron making and Steelmaking, 1990,17(6):1410一1419
[37]Sosinsky D.J.’Sommerville I.D.,The composition and temperature dependence of the sulfide capaeity of metall~oeM slags[J].Metal Trans,1996,17B(2):331—337.
[38]姜周华.洁净钢炉外精炼技术[c].深圳:洁净钢生产技术高级研讨会,2006.12:113~ 118
[39]Duffy J A 0ptical basicity of fluoried containing slag[J].Ironmaking and Steelmaking, 1990,17(6):410.
[40]Young RW,Dully JA。Hassall GJ,et a1.Use of opticalbasicity concept for determining pbosphorus and sulphurslag-metal partitions[J].Imnmaking and Steelmaking,1992,119(3): 201-219.
[41]梁约军.氧气顶吹转炉炼钢脱硫的理论与实践.世界金属导报,2007-07-05.