Abstract：The Low carbon and hydrogen-rich smelting technology of the blast furnace, such as pulverized coal injection and hydrogen-rich fuel injection, will lead to the increase of hydrogen content in the bosh gas of blast furnace. In order to explore the influence of hydrogen-rich on the upper burden of blast furnace, the reduction behavior of different iron-containing burdens under the condition of hydrogen-rich is studied. The pulverization experiment found that under the condition of 20%H2(volume percent), the pulverization rate of lump ore and sinter is obviously improved, and RDI>3.15 mm is increased by 11.08% and 30.23% respectively. At the same time, the condition of rich hydrogen is conducive to the homogenization of iron-containing burdens. The reduction experiment shows that under the condition of constant CO volume percent and changing the content of H2, the H2 volume percent of pellet and sinter is 25% at the highest reduction degree, and that of lump ore is 10%. When the volume percent of (CO+H2) is kept at 30% and the amount of H2 is changed, when the volume percent of H2 is more than 20%, the reduction degree of each iron-containing burdens is more than 90%. The results of SEM analysis show that the reduced block ore obviously produces slag and iron phase, the pellet ore presents good hematite and magnetite phase, and the acicular calcium ferrite phase-magnetite phase-iron phase appeared in the sinter.
[1] 王广,王静松,左海滨,等. 高炉煤气循环耦合富氢对中国炼铁低碳发展的意义[J].中国冶金, 2019, 29(10):1.(WANG Guang,WANG Jing-song,ZUO Hai-bin. Effect of blast furnace gas recycling with hydrogen injection on low carbon development of Chinese ironmaking[J].China Metallurgy, 2019, 29(10):1.) [2] 张利娜,李辉,程琳,等.国外钢铁行业低碳技术发展概况[J].冶金经济与管理,2018,194(5):32.(ZHANG Li-na, LI Hui, CHENG Lin, et al. Development of low carbon technology in foreign steel industry[J]. Metallurgical Economy and Management,2018,194(5):32.) [3] Cavaliere P, Perrone A. Optimization of blast furnace productivity coupled with CO2 emissions reduction[J]. Steel Research International, 2014, 85(1): 89. [4] 赵沛, 董鹏莉. 碳排放是中国钢铁业未来不容忽视的问题[J].钢铁,2018,53(8):1.(ZHAO Pei,DONG Peng-li. Carbon emission is an issue that cannot be ignored in the future of China's steel industry [J].Iron and Steel,2018, 53(8): 1.) [5] Onarheim K, Mathisen A, Arasto A. Barriers and opportunities for application of CCS in Nordic industry-A sectorial approach[J].International Journal of Greenhouse Gas Control,2015, 36: 93. [6] Kashihara Yusuke, Sawa Yoshitaka, Sato Michitaka. Effect of hydrogen addition on reduction behavior of ore layer mixed with coke[J].ISIJ International,2012,52(11):1979. [7] 左海滨, 张建良, 王筱留.高炉低碳炼铁分析[J].钢铁,2012,47(12): 86.(ZUO Hai-bin,ZHANG Jian-liang,WANG Xiao-liu.Analysis of low carbon ironmaking in blast furnace[J]. Iron and Steel, 2012, 47(12): 86.) [8] 吴铿, 折媛, 刘起航,等.高炉大型化后对焦炭性质及在炉内劣化的思考[J].钢铁,2017,52(10): 1. (WU Keng, SHE Yuan, LIU Qi-hang, et al. Consideration on properties of coke and coke deterioration after large-scale blast furnace[J]. Iron and Steel, 2017, 52(10): 1.) [9] 陈龙,薛庆国,郭文涛,等.氧气高炉块矿与烧结矿软熔过程交互作用[J].钢铁,2016,51(2):15. (CHEN Long, XUE Qing-guo,GUO Wen-tao,et al.Interaction between oxygen blast furnace lump ore and sinter soft melt process[J]. Iron and Steel, 2016, 51(2): 15.) [10] WANG Ping,LI Jia-xin,ZHOU Li-ying, et al.Theoretical and experimental investigation of oxygen blast furnace process with high injection of hydrogenous fuel[J].Ironmaking Steelmaking, 2013,40(4):312. [11] MA Kai-hui, XU Jian, DENG Jun-yi, et al. Hydrogen impact on the shrinkage behaviors of wustite packed beds above 900 ℃[J]. International Journal of Hydrogen Energy,2019,44(36): 19555. [12] WU S L, LIU X Q, ZHOU Q, et al. Low temperature reduction degradation characteristics of sinter, pellet and lump ore[J]. Journal of Iron and Steel Research, International,2011,18(8): 20. [13] 杨广庆, 张建良, 陈永星, 等. 炉腹煤气中氢气含量对炉料软熔性能的影响[J].钢铁,2012,47(9): 14. (YANG Guang-qing, ZHANG Jian-liang,CHEN Yong-xing,et al.Effect of hydrogen content in furnace gas on reflow performance of furnace charge[J].Iron and Steel,2012,47(9):14.) [14] 田野, 吕庆, 刘小杰, 等.烧结矿在CO-H2-CO2-N2气氛下还原粉化行为研究[J].烧结球团,2016, 41(6): 1. (TIAN Ye, LÜ Qing, LIU Xiao-jie, et al. Reduction and pulverization behavior of sinter in CO-H2-CO2-N2 atmosphere[J].Sintering and Pelletizing,2016, 41(6):1.) [15] 张琦, 刘然, 刘朝卿, 等. 富氢对块状带低钛球团矿还原的影响研究[J].钢铁钒钛,2016, 37(5): 96. (ZHANG Qi, LIU Ran, LIU Chao-qing, et al. Study on the effect of hydrogen enrichment on the reduction of low-titanium pellets in massive belts[J].Steel and Steel Vanadium Titanium,2016, 37(5): 96.) [16] LI Jian, ZHU Jin-ming, XIONG Lin, et al. Reduction behaviors of iron ore lump and pellets with H2-CO gas[J].Baosteel Technical Research,2012, 6(2): 13. [17] Kon Tatsuya, Saito Ryo, Ueda Shigeru, et al. Reduction behavior of packed bed of sinter reduced by CO-CO2-H2-H2O-N2 gas[J].ISIJ International,2015, 55(6): 1213. [18] MA Kai-hui, XU Jian, DENG Jun-yi, et al. Transient interaction between reduction and slagging reactions of wustite in simulated cohesive zone of blast furnace[J]. Metallurgical and Materials Transactions: B, 2018, 49(5): 2308. [19] 李向伟, 陈令坤, 王炜. 球团矿富氢还原的动力学研究[J].材料与冶金学报,2013,12(4): 241.(LI Xiang-wei, CHEN Ling-kun, WANG Wei.Kinetics of hydrogen-rich reduction in pellets[J].Journal of Materials and Metallurgy,2013,12(4): 241.) [20] 沈峰满, 姜鑫, 魏国, 等. 富氢还原对烧结矿还原性及还原粉化的影响[J].中国冶金,2014,24(1): 2. (SHEN Feng-man, JIANG Xin, WEI Guo, et al. Effect of hydrogen reduction on reduction and reduction pulverization of sinter[J].China Metallurgy,2014,24(1): 2.) [21] 杨广庆, 国宏伟, 王春苗, 等. 酸性球团还原过程中微观结构变化研究[J].烧结球团,2015,40(2): 20. (YANG Guang-qing, GUO Hong-wei, WANG Chun-miao, et al. Study on microstructure changes during acid pellet reduction[J].Sintering and Pelletizing, 2015, 40(2): 20.) [22] 李胜, 何志军, 李云飞, 等. 不同球团矿和块矿配加条件下炉料冶金性能[J].钢铁,2020,55(1): 6.(LI Sheng, HE Zhi-jun, LI Yun-fei,et al. Metallurgical properties of furnace charge under different conditions of pellet ore and block ore addition[J].Iron and Steel,2020,55(1): 6.) [23] 牛乐乐, 刘征建, 张建良, 等. 铁矿粉矿物组成对烧结矿冶金性能的影响[J].钢铁,2019, 54(9): 27.(NIU Le-le, LIU Zheng-jian, ZHANG Jian-liang, et al. Effect of mineral composition of iron ore on metallurgical properties of sinter[J].Iron and Steel,2019, 54(9): 27.)
2020, Vol. 55 
