铁矿粉对铁焦炭化过程体积演变的影响
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摘要
为了研究铁矿粉对铁焦炭化过程中体积膨胀-收缩机制的影响,采用高温热台显微镜、Image-pro-plus软件、扫描电镜、XRD等先进的表征手段解析了不同铁矿粉及其添加量对铁焦成焦过程的宏观体积、微观结构和矿物组成的影响。研究结果表明,随着铁矿粉添加量的增加,铁焦炭化过程中的体积收缩量逐渐减小。相同铁矿粉添加量时,铁矿粉种类对铁焦炭化过程中的体积演变影响较小。炭化过程中铁焦内含铁矿物由Fe_2O_3逐渐还原为金属Fe,但不同铁矿物还原后在铁焦内的分布规律有所差异。
To study the effect of iron ore powder on the volumetric swelling and shrinkage behavior of iron coke during carbonization, the Image Pro Plus software, high temperature hot stage microscope, scanning electron microscope(SEM) and X-ray diffractometer(XRD) were used to reveal the volume, microstructure and mineral composition of iron coke with different amounts of iron ore powders. The results show that the shrinkage degree of iron coke gradually reduces with increasing the amount of iron ore powder addition. In the case of a same amount of iron ore addition, the volumetric evolution of iron coke has little relationship with the iron ore type during carbonization. All iron-containing minerals in the iron coke were reduced from Fe_2O_3 to Fe during the carbonization process, but the distribution of minerals in iron coke varied with the initial iron ore powder type.
To study the effect of iron ore powder on the volumetric swelling and shrinkage behavior of iron coke during carbonization, the Image Pro Plus software, high temperature hot stage microscope, scanning electron microscope(SEM) and X-ray diffractometer(XRD) were used to reveal the volume, microstructure and mineral composition of iron coke with different amounts of iron ore powders. The results show that the shrinkage degree of iron coke gradually reduces with increasing the amount of iron ore powder addition. In the case of a same amount of iron ore addition, the volumetric evolution of iron coke has little relationship with the iron ore type during carbonization. All iron-containing minerals in the iron coke were reduced from Fe_2O_3 to Fe during the carbonization process, but the distribution of minerals in iron coke varied with the initial iron ore powder type.
引文
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[20] 史世庄,孙超祺,毕学工,等.铁矿粉配比对铁焦性能影响的试验研究[J].钢铁,2014,49(5):7.(Shi S Z,Sun C Q,Bi X G,et al.Experimental research of effect of iron ore powders ratio on ferro-coke quality[J].Iron and Steel,2014,49(5):7.)
[21] Xu R S,Dai B W,Wang W,et al.Effect of iron ore type on the thermal behaviour and kinetics of coal-iron ore briquettes during coking[J].Fuel Processing Technology,2018,173:11.
[22] Zheng H,Wang W,Xu R S,et al.Effect of the particle size of iron ore on the pyrolysis kinetic behaviour of coal-iron ore briquettes[J].Energies,2018,11(10):2595.
[2] 王维兴.钢铁工业能耗现状和节能潜力分析[J].中国钢铁业,2011(4):19.(Wang W X.Analysis of energy consumption and energy saving potential in iron and steel industry [J].China Steel,2011(4):19.)
[3] 左海滨,张建良,王筱留.高炉低碳炼铁分析[J].钢铁,2013,47(12):86.(Zuo H B,Zhang J L,Wang X L.Analysis on low carbon iron-making for BF[J].Iron and Steel,2013,47(12):86.)
[4] 杨天钧,张建良,国宏伟.以科学发展观指导实现低消耗、低排放、高效益的低碳炼铁[J].炼铁,2012,31(4):1.(Yang T J,Zhang J L,Guo H W.Realization of highly benefit ironmaking at low consumption,emission and carbon[J].Ironmaking,2012,31(4):1.)
[5] 叶大武.我国焦煤产业现状及对策建议[J].中国煤炭,2005,31(2):49.(Ye D W.Present situation and countermeasures of coking coal industry in China[J].China Coal,2005,31(2):49.)
[6] 毛节华,许惠龙.中国煤炭资源分布现状和远景预测[J].煤田地质与勘探,1999,27(3):1.(Mao J H,Xu H L.Chinas coal resource distribution and perspective prediction[J].Coal Geology and Exploration,1999,27(3):1.)
[7] 高晋生.煤的热解、炼焦和煤焦油加工[M].北京:化学工业出版社,2010.(Gao J S.Coal Pyrolysis,Coking and Coal Tar Processing [M].Beijing:Chemical Industry Press,2010.)
[8] Nomura S,Higuchi K,Kunitomo K,et al.Reaction behavior of formed iron coke and its effect of decreasing thermal reserve zone temperature in blast furnace[J].ISIJ International,2010,50(10):1388.
[9] Yamamoto T,Sato T,Fujimoto F,et al.Reaction behavior of ferro coke and its evaluation in blast furnace[J].Tetsu-to-Hagané,2011,97(10):501.
[10] Kasai A,Matsui Y.Lowering of thermal reserve zone temperature in blast furnace by adjoining carbonaceous material and iron ore[J].ISIJ International,2004,44(12):2073.
[11] Murakami T,Kasai E.Utilization of ores with high combined water content for ore-carbon composite and iron coke[J].ISIJ International,2011,51(8):1220.
[12] 蔡湄夏,郭豪,张建良,等.铁氧化物对焦炭溶损反应的影响[J].钢铁研究学报,2009,21(7):8.(Cai M X,Guo H,Zhang J L,et al.Influence of iron oxide on coke solution loss reaction[J].Journal of Iron and Steel Research,2009,21(7):8.)
[13] 黄丹丹,曹银平,宋俐蓉,等.氧化铁对焦炭溶损反应的影响[J].化工进展,2015,34(2):330.(Huang D D,Cao Y P,Song L R,et al.Influence of iron oxide on coke solution loss reaction[J].Chemical Industry and Engineering Progress,2015,34(3):330.)
[14] 刘朋飞,李鹏,孙章,等.铁矿粉配煤对焦炭质量的影响[C]//2012冀苏鲁皖赣五省金属(冶金)学会第十六届焦化学术年会论文集.唐山:河北省金属学会,2012:62.(Liu P F,Li P,Sun Z,et al.Influence of coal blending with iron ore powder on coke quality[C]// Proceedings of the 16th Annual Meeting of Coking.Tangshan:Hebei Province Society for Metals,2012:62.)
[15] 石恭俭,原春阳,刘建国,等.澳矿含量对非焦煤含铁型焦气化反应温度的影响[J].太原理工大学学报,2013,44(4):444.(Shi G J,Yuan C Y,Liu J G,et al.Influence of Australian mine powder content on the starting temperature of gasification reaction of the carbon iron composite[J].Journal of Taiyuan University of Technology,2013,44(4):444.)
[16] 刘建国,张龙龙,原春阳,等.铁矿粉含量对神府煤制备的含铁型焦气化反应起始温度的影响[J].太原理工大学学报,2014,45(6):731.(Liu J G,Zhang L L,Yuan C Y,et al.Influence of iron ore powder content on the starting temperature of gasification reaction of carbon iron composite[J].Journal of Taiyuan University of Technology,2014,45(6):731.)
[17] 史世庄,董晴雯,毕学工,等.炼焦工艺条件对铁焦性能影响的试验[J].钢铁,2015,50(4):8.(Shi S Z,Dong Q W,Bi X G,et al.Experiment of coking process conditions on iron-coke properties[J].Iron and Steel,2015,50(4):8.)
[18] 史世庄,林志龙,毕学工,等.炼焦煤性质对铁焦性能影响的试验研究[J].太原理工大学学报,2015,46(3):283.(Shi S Z,Lin Z L,Bi X G,et al.Experimental research of effect of coking coal quality on iron coke performance[J].Journal of Taiyuan University of Technology,2015,46(3):283.)
[19] 张慧轩,毕学工,史世庄,等.炼焦配煤中添加铁矿石对焦炭性能的影响[J].武汉科技大学学报,2014,37(2):91.(Zhang H Y,Bi X G,Shi S Z,et al.Influence of iron ore addition to coal blend for coke-making on coke properties[J].Journal of Wuhan University of Science and Technology,2014,37(2):91.)
[20] 史世庄,孙超祺,毕学工,等.铁矿粉配比对铁焦性能影响的试验研究[J].钢铁,2014,49(5):7.(Shi S Z,Sun C Q,Bi X G,et al.Experimental research of effect of iron ore powders ratio on ferro-coke quality[J].Iron and Steel,2014,49(5):7.)
[21] Xu R S,Dai B W,Wang W,et al.Effect of iron ore type on the thermal behaviour and kinetics of coal-iron ore briquettes during coking[J].Fuel Processing Technology,2018,173:11.
[22] Zheng H,Wang W,Xu R S,et al.Effect of the particle size of iron ore on the pyrolysis kinetic behaviour of coal-iron ore briquettes[J].Energies,2018,11(10):2595.