基于n(Fe_2O_3)/n(CaO)的铁矿粉烧结液相流动性测定方法
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摘要
针对以碱度(R=w(CaO)/w(SiO_2),w为质量分数)控制混合料CaO的添加量的铁矿粉液相流动性检测方法(R值法)在评价SiO_2质量分数不同的铁矿粉时结论与烧结生产存在差异的问题,提出以混合料铁钙的物质的量比(n(Fe_2O_3)/n(CaO))控制CaO添加量的铁矿粉液相流动性检测方法(N值法)。分别以化学纯试剂和铁矿粉为原料,对比研究了R值法和N值法对液相流动性指数检测结果的影响;并基于2种检测结果进行优化配矿—烧结杯试验。研究结果表明:R值法测得液相流动性指数与铁矿粉中SiO_2质量分数有明显的线性正相关关系,掩盖了铁矿粉真实的液相流动特性;N值法可以显著减小SiO_2含量对铁矿粉液相流动性指数的影响。基于N值法的优化配矿—烧结产质量指标与R值法相比,成品率、利用系数、转鼓强度分别提高4.62%,0.11 t/(m~2·h)和1.91%,固体燃耗降低1.96 kg/t。
The liquid phase fluidity indexes of iron ores are generally tested by controlling the basicity(R= w(CaO)/w(SiO_2)) of mixture(R value method). In order to solve the problem that the liquid phase fluidity indexes of iron ores with different SiO_2 contents are inconsistent with the sintering actual production, a new improved method based on n(Fe_2O_3)/n(CaO) was proposed to add CaO(N value method). The effects of R value method and N value method on liquid phase fluidity indexes were studied by using pure chemical reagent and iron ores as raw materials. Based on these results, the optimizing ore blending-sintering pot tests were investigated. The results show that the liquid phase fluidity indexes measured by R value method have obvious linear positive correlation with SiO_2 mass fraction of iron ores, which can not really reflect the liquid phase fluidity indexes of iron ores. N value method can significantly reduce the effect of SiO_2 content on the liquid phase fluidity indexes. Compared with optimizing ore blending-sintering based on R value method, the sintering yield, productivity and tumbler strength of optimizing ore blending-sintering based on N value method are increased by 4.62%, 0.11 t/(m~2·h) and 1.91% respectively, while the solid fuel consumption reduces by 1.96 kg/t.
The liquid phase fluidity indexes of iron ores are generally tested by controlling the basicity(R= w(CaO)/w(SiO_2)) of mixture(R value method). In order to solve the problem that the liquid phase fluidity indexes of iron ores with different SiO_2 contents are inconsistent with the sintering actual production, a new improved method based on n(Fe_2O_3)/n(CaO) was proposed to add CaO(N value method). The effects of R value method and N value method on liquid phase fluidity indexes were studied by using pure chemical reagent and iron ores as raw materials. Based on these results, the optimizing ore blending-sintering pot tests were investigated. The results show that the liquid phase fluidity indexes measured by R value method have obvious linear positive correlation with SiO_2 mass fraction of iron ores, which can not really reflect the liquid phase fluidity indexes of iron ores. N value method can significantly reduce the effect of SiO_2 content on the liquid phase fluidity indexes. Compared with optimizing ore blending-sintering based on R value method, the sintering yield, productivity and tumbler strength of optimizing ore blending-sintering based on N value method are increased by 4.62%, 0.11 t/(m~2·h) and 1.91% respectively, while the solid fuel consumption reduces by 1.96 kg/t.
引文
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[10]苏步新,张建良.基于主成分分析的烧结铁矿粉性能评价[J].烧结球团,2014,39(6):1-6.SU Buxin,ZHANG Jianliang.Evaluation of sintering iron ore fines performance based on principal component analysis[J].Sintering and Pelletizing,2014,39(6):1-6.
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[13]贺淑珍.太钢配用巴西矿粉的烧结试验研究与生产实践[C]//第十二届全国炼铁原料学术会议论文集.北京:冶金工业出版社,2011:112-116.HE Shuzhen.Lab test and practice of sintering Brazilian fines in TISCO[C]//The 12th Ironmaking Raw Materials Conference Proceedings.Beijing:Metallurgy Industry Press,2011:112-116.
[14]赵俊花,宋福亮,甄晓初.高比例配加巴卡粉对烧结生产的影响[C]//第13届全国大高炉炼铁学术年会论文集.北京:冶金工业出版社,2012:878-883.ZHAO Junhua,SONG Fuliang,ZHEN Xiaochu.Influence of adding high proportion baka powder on iron ore sintering[C]//The 13th National blast furnace ironmaking Conference Proceedings.Beijing:Metallurgy Industry Press,2012:878-883.
[15]马莉,孟君,秦娇平,等.巴西高硅粉烧结性能试验研究[J].工业技术创新,2014,1(4):393-399.MA Li,MENG Jun,QIN Jiaopin,et al.The research of brazil’s high-silicon fine iron ore performance in Sintering[J].Industrial Technology Innovation,2014,1(4):393-399.
[16]范晓慧,孟君,陈许玲,等.铁矿烧结中铁酸钙形成的影响因素[J].中南大学学报(自然科学版),2008,39(6):1125-1131.FAN Xiaohui,MENG Jun,CHEN Xuling,et al.Influence offactors of calcium ferrite formation in iron ore sintering[J].Journal of Central South University(Science and Technology),2008,39(6):1125-1131.
[17]吴胜利,裴元东,陈辉,等.铁矿粉烧结液相流动性评价[J].北京科技大学学报,2008,30(10):1095-1100.WU Shengli,PEI Yuandong,CHEN Hui,et al.Evaluation on liquid phase fluidity of iron ore in sintering[J].Journal of University of Science and Technology Beijing,2008,30(10):1095-1100.
[18]裴元东.铁矿粉的烧结配合性及其应用技术研究[D].北京:北京科技大学冶金与生态工程学院,2008:50-60.PEI Yuandong.Study on sintering compatibility of iron ore powder and its application technology[D].Beijing:University of Science and Technology Beijing.School of Metallurgical and Ecological Engineering,2008:50-60.
[19]MATSUURA H,KURASHIGE M,NAKA M,et al.Melting and solidifying behaviors of the Ca O-Si O2-Fe Ox slags at various oxygen partial pressures[J].ISIJ International,2009,49(9):1283-1289.
[20]DING Xiang,GUO Xingmin,MA Chenyan,et al.Effect of Si O2,on the crystal structure stability of SFC at 1 473 K(1 200℃)[J].Metallurgical and Materials Transactions B,2015,46(3):1146-1153.
[21]DING Xiang,GUO Xingmin.Study of Si O2,involved in the formation process of silico-ferrite of calcium(SFC)by solid-state reactions[J].International Journal of Mineral Processing,2016,149(2):69-77.
[22]LONG Hongming,WU Xuejian,CHUN Tiejun,et al.Assimilation behavior of calcium ferrite and calcium diferrite with sintered Al2O3 and Mg O[J].Metallurgical and Materials Transactions B,2016,47(5):1-7.
[2]黄柱成,梁之凯,易凌云,等.高配比高铝褐铁矿烧结成矿机理[J].中南大学学报(自然科学版),2014,45(4):1013-1020.HUANG Zhucheng,LIANG Zhikai,YI Lingyun,et al.Metallogenic mechanism of sintering of high ratio of high alumina limonite[J].Journal of Central South University(Science and Technology),2014,45(4):1013-1020.
[3]姜涛.铁矿造块学[M].长沙:中南大学出版社,2016:75-90.JIANG Tao.Principles and technology of agglomeration of iron ores[M].Changsha:Central South University Press,2016:75-90.
[4]范晓慧.铁矿烧结优化配矿原理与技术[M].北京:冶金工业出版社,2013:48-70.FAN Xiaohui.Principle and technology of iron ore matching for sintering[M].Beijing:Metallurgical Industry Press,2013:48-70.
[5]吴胜利,杜建新,马洪斌,等.铁矿粉烧结液相流动特性[J].北京科技大学学报,2005,27(3):291-293.WU Shengli,DU Jianxin,MA Hongbin,et al.Fluidity of liquid phase in iron ores during sintering[J].Journal of University of Science and Technology Beijing,2005,27(3):291-293.
[6]吴胜利,戴宇明,DAUTER O,等.基于铁矿粉高温特性互补的烧结优化配矿[J].北京科技大学学报,2010,32(6):719-724.WU Shengli,DAI Yuming,DAUTER O,et al.Optimization of ore blending during sintering based on complementation of high temperature properties[J].Journal of University of Science and Technology Beijing,2010,32(6):719-724.
[7]袁晓丽,范晓慧,万新,等.烧结优化配矿模型的设计与软件开发[J].中南大学学报(自然科学版),2009,40(6):1476-1481.YUAN Xiaoli,FAN Xiaohui,WAN Xin,et al.Design and development of optimizing iron ores matching model and software[J].Journal of Central South University(Science and Technology),2009,40(6):1476-1481.
[8]YAN Bingji,ZHANG Jianliang,GUO Hongwei,et al.Hightemperature performance prediction of iron ore fines and the ore-blending programming problem in sintering[J].International Journal of Minerals,Metallurgy,and Materials,2014,21(8):741-747.
[9]朱德庆,熊守安,仉宏亮,等.铬铁精矿球团烧结工艺与机理[J].中南大学学报(自然科学版),2010,41(5):1658-1667.ZHU Deqing,XIONG Shouan,ZHANG Hongliang,et al.Pellets sintering process of chromite concentrate and mechanism of consolidation[J].Journal of Central South University(Science and Technology),2010,41(5):1658-1667.
[10]苏步新,张建良.基于主成分分析的烧结铁矿粉性能评价[J].烧结球团,2014,39(6):1-6.SU Buxin,ZHANG Jianliang.Evaluation of sintering iron ore fines performance based on principal component analysis[J].Sintering and Pelletizing,2014,39(6):1-6.
[11]武轶,吴胜利,杜建新.马钢常用铁矿石的烧结基础特性研究[J].钢铁研究,2008,36(4):5-8.WU Yi,WU Shengli,DU Jianxin.Study on basic sintering characteristics of fine ores used in Masteel[J].Research on Iron and Steel,2008,36(4):5-8.
[12]陈绍国,裴元东,潘文,等.首钢京唐主流铁矿粉单种矿烧结试验研究[C]//第十四届全国炼铁原料学术会议论文集.北京:冶金工业出版社,2015:87-91.CHEN Shaoguo,PEI Yuandong,PAN Wen,et al.Experimental research on single sintering pot test of mainstream iron ore in Shougang Jingtang[C]//The 14th Ironmaking Raw Materials Conference Proceedings.Beijing:Metallurgy Industry Press,2015:87-91.
[13]贺淑珍.太钢配用巴西矿粉的烧结试验研究与生产实践[C]//第十二届全国炼铁原料学术会议论文集.北京:冶金工业出版社,2011:112-116.HE Shuzhen.Lab test and practice of sintering Brazilian fines in TISCO[C]//The 12th Ironmaking Raw Materials Conference Proceedings.Beijing:Metallurgy Industry Press,2011:112-116.
[14]赵俊花,宋福亮,甄晓初.高比例配加巴卡粉对烧结生产的影响[C]//第13届全国大高炉炼铁学术年会论文集.北京:冶金工业出版社,2012:878-883.ZHAO Junhua,SONG Fuliang,ZHEN Xiaochu.Influence of adding high proportion baka powder on iron ore sintering[C]//The 13th National blast furnace ironmaking Conference Proceedings.Beijing:Metallurgy Industry Press,2012:878-883.
[15]马莉,孟君,秦娇平,等.巴西高硅粉烧结性能试验研究[J].工业技术创新,2014,1(4):393-399.MA Li,MENG Jun,QIN Jiaopin,et al.The research of brazil’s high-silicon fine iron ore performance in Sintering[J].Industrial Technology Innovation,2014,1(4):393-399.
[16]范晓慧,孟君,陈许玲,等.铁矿烧结中铁酸钙形成的影响因素[J].中南大学学报(自然科学版),2008,39(6):1125-1131.FAN Xiaohui,MENG Jun,CHEN Xuling,et al.Influence offactors of calcium ferrite formation in iron ore sintering[J].Journal of Central South University(Science and Technology),2008,39(6):1125-1131.
[17]吴胜利,裴元东,陈辉,等.铁矿粉烧结液相流动性评价[J].北京科技大学学报,2008,30(10):1095-1100.WU Shengli,PEI Yuandong,CHEN Hui,et al.Evaluation on liquid phase fluidity of iron ore in sintering[J].Journal of University of Science and Technology Beijing,2008,30(10):1095-1100.
[18]裴元东.铁矿粉的烧结配合性及其应用技术研究[D].北京:北京科技大学冶金与生态工程学院,2008:50-60.PEI Yuandong.Study on sintering compatibility of iron ore powder and its application technology[D].Beijing:University of Science and Technology Beijing.School of Metallurgical and Ecological Engineering,2008:50-60.
[19]MATSUURA H,KURASHIGE M,NAKA M,et al.Melting and solidifying behaviors of the Ca O-Si O2-Fe Ox slags at various oxygen partial pressures[J].ISIJ International,2009,49(9):1283-1289.
[20]DING Xiang,GUO Xingmin,MA Chenyan,et al.Effect of Si O2,on the crystal structure stability of SFC at 1 473 K(1 200℃)[J].Metallurgical and Materials Transactions B,2015,46(3):1146-1153.
[21]DING Xiang,GUO Xingmin.Study of Si O2,involved in the formation process of silico-ferrite of calcium(SFC)by solid-state reactions[J].International Journal of Mineral Processing,2016,149(2):69-77.
[22]LONG Hongming,WU Xuejian,CHUN Tiejun,et al.Assimilation behavior of calcium ferrite and calcium diferrite with sintered Al2O3 and Mg O[J].Metallurgical and Materials Transactions B,2016,47(5):1-7.
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