w(MgO)和w(Al_2O_3)对混合炉料软熔性能的影响
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摘要
改善高w(Al_2O_3)矿石冶炼的常用方法是增加烧结矿w(MgO),则高碱度烧结矿中w(MgO)和w(Al_2O_3)均升高且w(MgO)/w(Al_2O_3)改变。为降低冶炼成本,需合理调控高炉综合炉料的w(MgO)和w(Al_2O_3)。以现场烧结矿和天然块矿为试验原料,考察了烧结矿中w(MgO)和w(Al_2O_3)均增加的条件下混合炉料软熔性能的变化规律,结合相图和X射线衍射分析w(MgO)和w(Al_2O_3)的影响机制。结果表明,随着烧结矿中w(MgO)和w(Al_2O_3)增加,混合炉料软化特征温度降低;渣相熔化温度和黏度下降引起混合炉料的熔化特征温度降低,添加MgO能改善高Al_2O_3炉料的软熔性能,达到适宜的w(MgO)/w(Al_2O_3)即可。
The popular measure to improve the smelting of high w(Al_2O_3)ore in BF is adding w(MgO)into the sinter,and then both the w(MgO)and the w(Al_2O_3)in the sinter increase and the w(MgO)/w(Al_2O_3)ratio changes. To reach low smelting cost,it is of need to adjust w(MgO)and w(Al_2O_3)in burden reasonablely. Based on the actual production of sinters and the lump,the variation trends of softening-melting properties of mixed burdens under the conditions that both the w(MgO)and the w(Al_2O_3)were increased in the sinter. Combined with phase diagrams and X-ray diffractions,influencing mechanisms of the w(MgO)and the w(Al_2O_3)were analyzed. The results showed that,with the increasing of the w(MgO)and the w(Al_2O_3)in the sinter,the softening characteristic temperatures of mixed burdens tended to decrease;the reduction of the melting temperature and the viscosity of the slag phase caused the reduction of the melting characteristic temperatures of mixed burdens;adding w(MgO)to reach a proper w(MgO)/w(Al_2O_3)could improve the softening-melting properties of the high w(Al_2O_3)burden.
The popular measure to improve the smelting of high w(Al_2O_3)ore in BF is adding w(MgO)into the sinter,and then both the w(MgO)and the w(Al_2O_3)in the sinter increase and the w(MgO)/w(Al_2O_3)ratio changes. To reach low smelting cost,it is of need to adjust w(MgO)and w(Al_2O_3)in burden reasonablely. Based on the actual production of sinters and the lump,the variation trends of softening-melting properties of mixed burdens under the conditions that both the w(MgO)and the w(Al_2O_3)were increased in the sinter. Combined with phase diagrams and X-ray diffractions,influencing mechanisms of the w(MgO)and the w(Al_2O_3)were analyzed. The results showed that,with the increasing of the w(MgO)and the w(Al_2O_3)in the sinter,the softening characteristic temperatures of mixed burdens tended to decrease;the reduction of the melting temperature and the viscosity of the slag phase caused the reduction of the melting characteristic temperatures of mixed burdens;adding w(MgO)to reach a proper w(MgO)/w(Al_2O_3)could improve the softening-melting properties of the high w(Al_2O_3)burden.
引文
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[8]王晓哲,张建良,刘征建,等.块矿对高炉炉料冶金性能的影响[J].钢铁研究,2017,45(5):1.(WANG Xiao-zhe,ZHANGJian-liang,LIU Zheng-jian,et al.Influence of lump ore on metallurgical properties of blast furnace burden[J].Research on Iron and Steel,2017,45(5):1.)
[9]姜鑫,吴钢生,魏国,等.MgO对烧结工艺及烧结矿冶金性能的影响[J].钢铁,2006,41(3):8.(JIANG Xin,WU Gang-sheng,WEI Guo,et al.Effect of MgO on sintering process and metallurgical properties of sinter[J].Iron and Steel,2006,41(3):8.)
[10]郭贺,沈峰满,柳明旭,等.MgO以及装料方式不同对烧结矿熔滴性能的影响[J].材料与冶金学报,2017,16(1):13.(GUO He,SHEN Feng-man,LIU Ming-xu,et al.Effects of MgO and burden charging pattern of the sinter ore on melting and dropping[J].Journal of Materials and Metallurgy,2017,16(1):13.)
[11]王喆,张建良,左海滨,等.Al2O3质量分数对高碱度烧结矿软熔滴落性能影响[J].钢铁,2015,50(7):20.(WANG Zhe,ZHANG Jian-liang,ZUO Hai-bin,et al.Influence of Al2O3content on softening-melting property of highbasicity sinter[J].Iron and Steel,2015,50(7):20.)
[12]胡长庆,闫龙格,赵凯,等.Al2O3、MgO交互作用对复合铁酸钙生成影响机理[J].中国冶金,2017,27(4):5.(HU Changqing,YAN Long-ge,ZHAO Kai,et al.Influence mechanism of interactions between Al2O3and MgO on generation of composite calcium ferrite[J].China Metallurgy,2017,27(4):5.)
[13]郭玉峰,郭兴敏.MgO对铁矿石烧结过程中二次赤铁矿形成的影响[J].钢铁研究学报,2017,29(3):185.(GUO Yu-feng,GUO Xing-min.Effect of MgO on formation of secondary hematite in sintering process of iron ores[J].Journal of Iron and Steel Research,2017,29(3):185.)
[14]谢洪恩,秦兴国,郑魁,等.高钛型高炉渣熔化性温度影响因素分析[J].中国冶金,2017,27(9):13.(XIE Hong-en,QINXing-guo,ZHENG Kui,et al.Analysis of effect factors of smelting temperature of high-titanium-type blast furnace slag[J].China Metallurgy,2017,27(9):13)
[15]李福民,吕庆,胡宾生,等.高炉渣的冶金性能及造渣制度[J].钢铁,2006,41(4):19.(LI Fu-min,LU?Qing,HU Bin-sheng,et al.Metallurgical properties of BF slag and slagging regime[J].Iron and Steel,2006,41(4):19.)
[16]SUN Chang-yu,LIU Xiao-hong,LI Jing,et al.Influence of Al2O3and MgO on the viscosity and stability of CaO-MgO-SiO2-Al2O3slags with CaO/SiO2=1.0[J].ISIJ International,2017,57(6):978.
[17]彭其春,陈本强,朱诚意,等.湘钢高Al2O3高炉渣脱硫能力的试验研究[J].武汉科技大学学报:自然科学版,2006,29(1):1.(PENG Qi-chun,CHEN Ben-qiang,ZHU Cheng-yi,et al.Experimental research on high Al2O3BF slag desulphurization ability in Xiangtan Iron and Steel Corp[J].Journal of Wuhan University of Science and Technology:Natural Science,2006,29(1):1.)
[18]柳政根,储满生,陈立杰,等.烧结矿中MgO对钒钛矿综合炉料软熔滴落的影响[J].东北大学学报:自然科学版,2015,36(5):655.(LIU Zheng-gen,CHU Man-sheng,CHEN Li-jie,et al.Effects of MgO content in sinter on softening-dripping behavior of vanadium-titanium magnetite composite burdens[J].Journal of Northeastern University:Natural Science,2015,36(5):655.)
[19]吕庆,王福佳,陈树军.烧结矿MgO含量对含钒钛炉料熔滴性能影响[J].钢铁研究学报,2016,28(9):24.(LüQing,WANG Fu-jia,CHEN Shu-jun.Influence of MgO content in sinter on droplet performance of vanadium-titanium burden[J].Journal of Iron and Steel Research,2016,28(9):24.)
[20]LI Ting-Le,SUN Chang-yu,LIU Xue-yan,et al.The effects of MgO and Al2O3behaviours on softening-melting properties of high basicity sinter[J].Ironmaking and Steelmaking,2018,45(8):755.
[21]兰东,李廷乐,孙长余,等.含钛高碱度烧结矿软熔成渣行为[J].钢铁,2018,53(9):7.(LAN Dong,LI Ting-le,SUN Changyu,et al.Slag evolution of Ti-bearing high basicity sinter duringsoftening-melting process[J].Iron and Steel,2018,53(9):7.)
[22]Umadevi T,Nelson K,Mahapatra P C,et al.Influence of magnesia on iron ore sinter properties and productivity[J].Ironmaking and Steelmaking,2009,36(7):515.
[23]姜鑫,吴钢生,金明芳,等.MgO对烧结矿软熔性能的影响[J].东北大学学报:自然科学版,2006,27(12):1358.(JIANGXin,WU Gang-sheng,JIN Ming-fang,et al.Effect of MgO content on softening-melting property of sinter[J].Journal of Northeastern University:Natural Science,2006,27(12):1358.)
[24]Nandy B,Chandra S,Bhattacharjee D,et al.Assessment of blast furnace behaviour through softening-melting test[J].Ironmaking and Steelmaking,2006,33(2):111.
[25]Eisenhüttenleute VD.Slag Atlas[M].2nd ed.Düsseldorf:Verlag Stahleisen GmbH,1995.
[26]Seok S H,Jung S M,Lee Y S,et al.Viscosity of highly basic slags[J].ISIJ International,2007,47(8):1090.
[27]Lee Y S,Min D J,Jung S M,et al.Influence of basicity and FeO content on viscosity of blast furnace type slags containing FeO[J].ISIJ International,2004,44(8):1283.
[2]沈峰满,郑海燕,姜鑫,等.高炉炼铁工艺中Al2O3的影响及适宜w(MgO)/w(Al2O3)的探讨[J].钢铁,2014,49(1):1.(SHENFeng-man,ZHENG Hai-yan,JIANG Xin,et al.Influence of Al2O3in blast furnace smelting and discussions on proper w(MgO)/w(Al2O3)ratio[J].Iron and Steel,2014,49(1):1.)
[3]SHEN Feng-man,JIANG Xin,WU Gang-sheng,et al.Proper MgO addition in blast furnace operation[J].ISIJ International,2006,46(1):65.
[4]吴胜利,韩宏亮,许海法,等.高炉内烧结矿与块矿高温交互反应机理研究[J].过程工程学报,2010,10(增刊1):37.(WUSheng-li,HAN Hong-liang,XU Hai-fa,et al.Research on mechanism of interaction between sinter and lump ores in blast furnace[J].The Chinese Journal of Process Engineering,2010,10(s1):37.)
[5]WU Sheng-li,HAN Hong-liang,XU Hai-fa,et al.Increasing lump ores proportion in blast furnace based on the high-temperature interactivity of iron bearing materials[J].ISIJ International,2010,50(5):686.
[6]吴胜利,汪国俊,姜伟忠,等.高炉内天然块矿与烧结矿高温交互反应研究[J].钢铁,2007,42(3):10.(WU Sheng-li,WANG Guo-jun,JIANG Wei-zhong,et al.Interaction between lump ore and sinter in BF[J].Iron and Steel,2007,42(3):10.)
[7]刘杰,张洪宇,周明顺,等.基于软熔滴落性能的高炉合理炉料结构[J].钢铁,2016,51(9):11.(LIU Jie,ZHANG Hong-yu,ZHOU Ming-shun,et al.Rational burden structure of blast furnace based on softeningand melting property[J].Iron and Steel,2016,51(9):11.)
[8]王晓哲,张建良,刘征建,等.块矿对高炉炉料冶金性能的影响[J].钢铁研究,2017,45(5):1.(WANG Xiao-zhe,ZHANGJian-liang,LIU Zheng-jian,et al.Influence of lump ore on metallurgical properties of blast furnace burden[J].Research on Iron and Steel,2017,45(5):1.)
[9]姜鑫,吴钢生,魏国,等.MgO对烧结工艺及烧结矿冶金性能的影响[J].钢铁,2006,41(3):8.(JIANG Xin,WU Gang-sheng,WEI Guo,et al.Effect of MgO on sintering process and metallurgical properties of sinter[J].Iron and Steel,2006,41(3):8.)
[10]郭贺,沈峰满,柳明旭,等.MgO以及装料方式不同对烧结矿熔滴性能的影响[J].材料与冶金学报,2017,16(1):13.(GUO He,SHEN Feng-man,LIU Ming-xu,et al.Effects of MgO and burden charging pattern of the sinter ore on melting and dropping[J].Journal of Materials and Metallurgy,2017,16(1):13.)
[11]王喆,张建良,左海滨,等.Al2O3质量分数对高碱度烧结矿软熔滴落性能影响[J].钢铁,2015,50(7):20.(WANG Zhe,ZHANG Jian-liang,ZUO Hai-bin,et al.Influence of Al2O3content on softening-melting property of highbasicity sinter[J].Iron and Steel,2015,50(7):20.)
[12]胡长庆,闫龙格,赵凯,等.Al2O3、MgO交互作用对复合铁酸钙生成影响机理[J].中国冶金,2017,27(4):5.(HU Changqing,YAN Long-ge,ZHAO Kai,et al.Influence mechanism of interactions between Al2O3and MgO on generation of composite calcium ferrite[J].China Metallurgy,2017,27(4):5.)
[13]郭玉峰,郭兴敏.MgO对铁矿石烧结过程中二次赤铁矿形成的影响[J].钢铁研究学报,2017,29(3):185.(GUO Yu-feng,GUO Xing-min.Effect of MgO on formation of secondary hematite in sintering process of iron ores[J].Journal of Iron and Steel Research,2017,29(3):185.)
[14]谢洪恩,秦兴国,郑魁,等.高钛型高炉渣熔化性温度影响因素分析[J].中国冶金,2017,27(9):13.(XIE Hong-en,QINXing-guo,ZHENG Kui,et al.Analysis of effect factors of smelting temperature of high-titanium-type blast furnace slag[J].China Metallurgy,2017,27(9):13)
[15]李福民,吕庆,胡宾生,等.高炉渣的冶金性能及造渣制度[J].钢铁,2006,41(4):19.(LI Fu-min,LU?Qing,HU Bin-sheng,et al.Metallurgical properties of BF slag and slagging regime[J].Iron and Steel,2006,41(4):19.)
[16]SUN Chang-yu,LIU Xiao-hong,LI Jing,et al.Influence of Al2O3and MgO on the viscosity and stability of CaO-MgO-SiO2-Al2O3slags with CaO/SiO2=1.0[J].ISIJ International,2017,57(6):978.
[17]彭其春,陈本强,朱诚意,等.湘钢高Al2O3高炉渣脱硫能力的试验研究[J].武汉科技大学学报:自然科学版,2006,29(1):1.(PENG Qi-chun,CHEN Ben-qiang,ZHU Cheng-yi,et al.Experimental research on high Al2O3BF slag desulphurization ability in Xiangtan Iron and Steel Corp[J].Journal of Wuhan University of Science and Technology:Natural Science,2006,29(1):1.)
[18]柳政根,储满生,陈立杰,等.烧结矿中MgO对钒钛矿综合炉料软熔滴落的影响[J].东北大学学报:自然科学版,2015,36(5):655.(LIU Zheng-gen,CHU Man-sheng,CHEN Li-jie,et al.Effects of MgO content in sinter on softening-dripping behavior of vanadium-titanium magnetite composite burdens[J].Journal of Northeastern University:Natural Science,2015,36(5):655.)
[19]吕庆,王福佳,陈树军.烧结矿MgO含量对含钒钛炉料熔滴性能影响[J].钢铁研究学报,2016,28(9):24.(LüQing,WANG Fu-jia,CHEN Shu-jun.Influence of MgO content in sinter on droplet performance of vanadium-titanium burden[J].Journal of Iron and Steel Research,2016,28(9):24.)
[20]LI Ting-Le,SUN Chang-yu,LIU Xue-yan,et al.The effects of MgO and Al2O3behaviours on softening-melting properties of high basicity sinter[J].Ironmaking and Steelmaking,2018,45(8):755.
[21]兰东,李廷乐,孙长余,等.含钛高碱度烧结矿软熔成渣行为[J].钢铁,2018,53(9):7.(LAN Dong,LI Ting-le,SUN Changyu,et al.Slag evolution of Ti-bearing high basicity sinter duringsoftening-melting process[J].Iron and Steel,2018,53(9):7.)
[22]Umadevi T,Nelson K,Mahapatra P C,et al.Influence of magnesia on iron ore sinter properties and productivity[J].Ironmaking and Steelmaking,2009,36(7):515.
[23]姜鑫,吴钢生,金明芳,等.MgO对烧结矿软熔性能的影响[J].东北大学学报:自然科学版,2006,27(12):1358.(JIANGXin,WU Gang-sheng,JIN Ming-fang,et al.Effect of MgO content on softening-melting property of sinter[J].Journal of Northeastern University:Natural Science,2006,27(12):1358.)
[24]Nandy B,Chandra S,Bhattacharjee D,et al.Assessment of blast furnace behaviour through softening-melting test[J].Ironmaking and Steelmaking,2006,33(2):111.
[25]Eisenhüttenleute VD.Slag Atlas[M].2nd ed.Düsseldorf:Verlag Stahleisen GmbH,1995.
[26]Seok S H,Jung S M,Lee Y S,et al.Viscosity of highly basic slags[J].ISIJ International,2007,47(8):1090.
[27]Lee Y S,Min D J,Jung S M,et al.Influence of basicity and FeO content on viscosity of blast furnace type slags containing FeO[J].ISIJ International,2004,44(8):1283.
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