富氧顶吹熔融还原高磷铁矿中磷的行为

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英文篇名：Behaviors of Phosphorus in Smelting Reduction of High-phosphorus Iron Ore by Top-blown Enriched Oxygen 作者：魏可 ; 卿山 ; 王华 ; 邓文龙 ; 施哲 英文作者：WEI Ke, QING Shan, WANG Hua, DENG Wen-long, SHI Zhe (Engineering Research Center of Metallurgical Energy Conservation and Emission Reduction, Ministry of Education, Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650093, China) 关键词：高磷铁矿 ; 熔融还原 ; 磷 ; 脱磷 英文关键词：high-phosphorus iron ore; smelting reduction; phosphorus; dephosphorization 中文刊名：HGYJ 英文刊名：The Chinese Journal of Process Engineering 机构：昆明理工大学冶金与能源工程学院冶金节能减排教育部工程研究中心; 出版日期：2013-02-15 出版单位：过程工程学报 年：2013 期：v.13 基金：国家自然科学基金资助项目(编号:51064015);; 云南省教育厅重大基金资助项目(编号:ZD2010001) 语种：中文; 页：HGYJ201301015 页数：5 CN：01 ISSN：11-4541/TQ 分类号：82-86

摘要

采用富氧顶吹熔融还原技术冶炼高磷铁矿,研究了熔渣碱度、碳氧比、熔炼温度、通氧(纯度99%)时间及流量对铁浴中磷的影响.结果表明,随温度升高,铁水中磷含量降低,温度过高出现回磷现象;在一定范围内提高碱度、通氧时间和流量,脱磷率提升显著;随碳氧比增大,脱磷率降低;温度1550℃、碳氧摩尔比1.0、碱度1.1、通氧时间10min、氧气流量250L/h条件下,可冶炼出磷含量0.068%的铁水,脱磷率高达92%,所得生铁可用于后期炼钢.
        The iron-making process of high-phosphorus iron ore by oxygen top-blown smelting reduction was studied, the effects of slag basicity, molar ratio of carbon to oxygen, smelting temperature, oxygen blowing time (oxygen purity at 99%) and oxygen flow rate on phosphorus distribution in the process were investigated. The results showed that the phosphorus in the molten iron decreased with the increase of temperature. However, excessive temperature led to rephosphorization phenomenon. Dephosphorization rate was enhanced as rising of slag basicity, oxygen-enriched rate and time of oxygen application within a certain range. However, the dephosphorization rate declined with rising of molar ratio of carbon to oxygen. The optimum conditions were: 1550℃, molar ratio of carbon to oxygen 1.0, slag basicity 1.1, oxygen purging time 10 min, and oxygen flow rate of 250L/h. Under these conditions, the phosphorus content in the molten iron was 0.068%, and the dephosphorization rate up to 92%. The resulting pig iron could be used in steel-making.

引文

[1]汪大洲.钢铁生产中的脱磷[M].北京:冶金工业出版社,1986.138.
    [2]王筱留.钢铁冶金学炼铁部分,第2版[M].北京:冶金工业出版社,2000.9698.
    [3]纪军.高磷铁矿石脱磷技术研究[J].矿冶,2003,12(2):3337.
    [4]艾光华,李晓波,周源.高磷铁矿石脱磷技术研究现状及发展趋势[J].有色金属科学与工程,2011,2(4):5358.
    [5]周继程,薛正良,张海峰,等.高磷鲕状赤铁矿脱磷技术研究[J].炼铁,2007,26(2):4043.
    [6]徐建论,张澄.湘东含磷贫铁矿的脱磷行为直接还原选矿海绵铁炼钢法[J].湖南冶金,1980,8(3):112.
    [7]毕学工,周进东,黄志成,等.HIsmelt法冶炼高磷矿可能性分析[A].会议论文集专家编审委员会.2008全国炼铁生产技术会议暨炼铁年会论文集[C].2008.12891292.
    [8]Lee C M,Fruehan R J.Phosphorus Equilibrium between Hot Metal and Slag[J].Ironmaking Steelmaking,2005,32(6):503508.
    [9]Sobandi A,Katayama H G,Momono T.Activity of Phosphorus Oxide in CaO MnO SiO2P2O5(MgO,Fe tO)Slags[J].ISIJ Int.,l998,38(8):781788.
    [10]Li Y Z,Sun Y Q,Li X H.Study on the Extreme Value of Equilibrium Phosphorous Distribution between Liquid Iron and CaO MgO sat FeO n SiO2Slag System[J].Iron and Steel,1995,30(4):1416.
    [11]Basu S,Lahir A K,Seetharaman S.Phosphorus Partition between Liquid Steel and CaO SiO2FeO n P2O5MgO Slag Containing15to25Pct.FeO[J].Metall.Mater.Trans.B,2007,38(4):623624.
    [12]Turkdogan E T.Assessment of P2O5Activity Coefficients in Molten Slags[J].ISIJ Int.,2000,40(10):964970.
    [13]Nagabayashi R,Ban-ya S.Mathematical Expression of Phosphorus Distribution in Steelmaking Process by Quadratic Formalism[J]ISIJ Int.,1989,29(2):140142.
    [14]杨雪峰,张竹明,唐启荣,等.昆钢应用HIsemlt工艺的可行性[J].昆钢科技,2005,12(4):14.
    [15]郭占成,王大光,许志宏,等.熔融还原过程中磷的行为[J].钢铁,1992,27(2):610.
    [16]汤付江,王华,卿山,等.富氧顶吹熔融还原技术冶炼高磷铁矿的研究[J].材料导报,2011,25(4):9599.
    [17]李慧斌,王华,郈亚丽,等.富氧顶吹熔融还原冶炼高磷铁矿与钛铁矿配矿的试验研究[J].钢铁,2012,47(1):1923.
    [18]郈亚丽,王华,卿山.钛铁矿和高磷铁矿混合矿氧气顶吹熔融还原炼铁的工艺条件[J].过程工程学报,2011,11(6):10251029.
    [19]黄希祜.钢铁冶金原理,第3版.[M].北京:冶金工业出版社,2004.370376.
    [20]雷亚.炼钢学(上册)[M].北京:冶金工业出版社,2010.3742.
    [21]韩建淮.二次燃烧技术在70t超高功率电弧炉上的应用[J].钢铁,2002,37(2):1113.