Research progress on preparation and application of iron coke in blast furnace
BAO Ji-wei1, CHU Man-sheng2, LIU Zheng-gen1, HAN Dong1, CAO Lai-geng1, GUO Jun1
1. School of Metallurgy, Northeastern University, Shenyang 110819, Liaoning, China; 2. State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110819, Liaoning, China
Abstract：The iron and steel industry has been facing the current situation of resource shortage and environmental pollution for a long time, and energy saving, emission reduction and green metallurgy are the key points for the sustainable development of iron and steel industry. Blast furnace (BF) ironmaking is the key to energy conservation and emission reduction in iron and steel industry. So it is urgent to develop new low carbon blast furnace ironmaking technologies. Iron coke is a new type of carbon-iron compound burden for low carbon BF ironmaking. The utilization of iron coke in BF can decrease the temperature of heat reserve area, improve smelting efficiency, reduce coke ratio and reduce CO2 emission. The research progress on the preparation and application of iron coke at home and abroad were reviewed, mainly including the preparation process and BF application. The characteristics of various iron coke preparation processes were summarized. At the same time, the new technology of cold press molding-shaft furnace carbonization-BF application for iron coke preparation and application was proposed and studied. The preparation, metallurgical properties optimization and application in BF of iron coke by cold press molding were studied systematically. The suitable process conditions for the preparation of iron coke by cold press molding are as follows: 30% iron ore powder, 45% bituminous coal 1, 10% bituminous coal 2, 10% bituminous coal 3, 5% anthracite and 5% asphalt binder B are mixed and heated to 60 ℃, and then cold pressed into briquettes. The briquettes are carbonized at 1 000 ℃ for 4 h by shaft furnace. High quality iron cokes with compressive strength of 3 977 N, I type drum strength of 77.7%, reactivity of 69.7%, post-reaction strength (fixed gasification solution loss 20%) of 42% were obtained finally. By adding 20%-30% iron coke into the blast furnace burden, the melting and dropping performance of the burden are improved obviously. The above research results can provide a reference for the industrial production of iron coke and the application of iron coke in low carbon BF ironmaking.
鲍继伟, 储满生, 柳政根, 韩冬, 曹来更, 郭俊. 铁焦制备与高炉应用的研究进展[J]. 钢铁, 2020, 55(8): 38-48.
BAO Ji-wei, CHU Man-sheng, LIU Zheng-gen, HAN Dong, CAO Lai-geng, GUO Jun. Research progress on preparation and application of iron coke in blast furnace[J]. Iron and Steel, 2020, 55(8): 38-48.
[1] XU C C, CANG D Q. A brief overview of low CO2 emission technologies for iron and steel making[J]. Journal of Iron and Research, International, 2010, 17(3): 1. [2] 刘文权. 低碳炼铁和低碳经济[J]. 炼铁, 2010, 29(5): 53. (LIU Wen-quan. Low carbon ironmaking and low carbon economy[J]. Ironmaking, 2010, 29(5): 53.) [3] 张琦,贾国玉,蔡九菊,等. 钢铁企业炼铁系统碳素流分析及CO2减排措施[J]. 东北大学学报:自然科学版, 2013, 34(3): 392. (ZHANG Qi, JIA Guo-yu, CAI Jiu-ju, et al. Carbon flow analysis and CO2 emission reduction strategies of iron-making system in steel enterprise[J]. Journal of Northeastern University: Natural Science, 2013, 34(3): 392.) [4] 储满生, 赵伟, 柳政根, 等. 高炉使用含碳复合炉料的原理[J].钢铁, 2015, 50(3): 9. (CHU Man-sheng, ZHAO Wei, LIU Zheng-gen, et al. Principle on using carbon iron composite as blast furnace burden[J]. Iron and Steel, 2015, 50(3): 9.) [5] Nomura S, Higuchi K, Kunitomo K, et al. Reaction behavior of formed iron coke and its effect on decreasing thermal reserve zone temperature in blast furnace[J]. ISIJ International, 2010, 50(10): 1388. [6] Naito M, Nomura S, Kato K. Development of production and utilization technology of coke with high strength and high reactivity[J]. Tetsu-to-Hagané, 2010, 96(5): 201. [7] 烧结球团编辑部. 日本铁焦项目将从2016年开始正式进入实证阶段[J]. 烧结球团, 2016, 41(4): 48. (Sintering and Pelletizing Editorial Department. The iron coke project in Japan will officially enter the empirical stage from 2016[J]. Sintering and Pelletizing, 2016, 41(4): 48.) [8] Nomura S, Terashima H, Sato E, et al. Some fundamental aspects of highly reactive iron coke[J]. ISIJ International, 2007, 47(6): 823. [9] 任伟, 李金莲, 张立国, 等. 40 kg 焦炉制备型煤铁焦的实验研究[J]. 中国冶金, 2015, 25(4): 41. (REN Wei, LI Jin-lian, ZHANG Li-guo, et al. Experiment on preparation of iron coke briquette in 40 kg coke oven[J]. China Metallurgy, 2015, 25(4): 41.) [10] 任伟, 李金莲, 张立国, 等.含焦油渣铁焦的制备实验研究[C]//第十届中国钢铁年会暨第六届宝钢学术年会论文集III. 上海: 中国金属学会炼铁分会, 2015:1. (REN Wei, LI Jin-lian, ZHANG Li-guo, et al. The iron coke preparation with tar residue[C]// Proceedings of the 10th China Iron and Steel Annual Meeting and the 6th Baoshan Iron and Steel Plant Academic Annual Meeting III. Shanghai: Ironmaking Branch of the Chinese Society for Metals, 2015:1.) [11] 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 Shi-zhuang, DONG Qing-wen, BI Xue-gong, et al. Experiment of coking process conditions on iron-coke properties[J]. Iron and Steel, 2015, 50(4): 8.) [12] 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 Shi-zhuang, LIN Zhi-long, BI Xue-gong, et al. Experimental study on the influence of coking coal properties on iron-coke properties[J]. Journal of Taiyuan University of Technology, 2015, 46(3):283.) [13] 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 Hui-xuan, BI Xue-gong, SHI Shi-zhuang, et al. Influence of iron ore added in coking coal blending on coke properties[J].Journal of Wuhan University of Science and Technology, 2014, 37(2): 91.) [14] Suresh A, Panda A, Dominic M, et al. Utilisation of low-grade raw materials for preparation of reactive catalysed-coke for blast furnace application[J]. Ironmaking and Steelmaking, 2019, 46(5): 491. [15] Takashi A, Kiyoshi F, Hidekazu F. Development of carbon iron composite process[J]. JFE Technical Report, 2009(13): 1. [16] Takeda K, Anyashiki T, Sato T, et al. Recent developments and mid-and long-term CO2 mitigation projects in ironmaking[J]. Steel Research International, 2011, 82(5): 512. [17] Anyashiki T, Fujimoto H, Yamamoto T, et al. Basic examination of briquetting technology for ferro-coke process on 0.5 t/d bench scale plant[J]. Tetsu-to-Hagané, 2015, 101(10): 515. [18] Takeda K, Sato H, Anyashiki T, et al. Pilot plant scale development of an innovation ironmaking process for usage of low graded raw materials and CO2 mitigation[C]//Proceedings of the 6th International Congress on the Science and Technology of Ironmaking. Rio de Janeiro: Associacao Brasileira de Metalurgia Materiais e Mineracao, 2012: 710. [19] WANG H T, ZHAO W, CHU M S, et al. Current status and development trends of innovative blast furnace ironmaking technologies amied to environmental harmony and operation intellectualization[J]. Journal of Iron and Steel Research, International, 2017, 24(8): 751. [20] WANG H T, ZHAO W, CHU M S, et al. Effects of coal and iron ore blending on metallurgical properties of iron coke hot briquette[J]. Powder Technology, 2018, 328: 318. [21] WANG H T, CHU M S, ZHAO W, et al. Fundamental research on iron coke hot briquette—a new type burden used in blast furnace[J]. Ironmaking and Steelmaking, 2016, 43(8):571. [22] 王宏涛, 储满生, 赵伟, 等. 工艺参数对热压铁焦抗压强度的影响[J]. 东北大学学报:自然科学版, 2016, 37(6): 810. (WANG Hong-tao, CHU Man-sheng, ZHAO Wei, et al. Effect of process parameters on the compressive strength of iron coke hot briquette[J]. Journal of Northeastern University: Natural Science, 2016, 37(6): 810.) [23] Yamamoto T, Sato T, Fujimoto H, et al. Reaction behavior of ferro coke and its evaluation in blast furnace[J]. Tetsu-to-Hagané, 2011, 97(10): 501. [24] 徐志荣. JFE钢铁公司完成高炉使用铁焦阶段性试验[J]. 世界金属导报, 2013-05-14(B01). (XU Zhi-rong. Stage test of using iron coke in blast furnace completed by JFE Iron and Steel Company[J].World Metals, 2013-05-14(B01).) [25] Sato M, Matsuno H, Ishii K. Recent development of mid-and long-term CO2 mitigation technology at JFE Steel[C]//Asia Steel International Conference 2015. Yokohama: The Iron and Steel Institute of Japan, 2015: 12. [26] YU X B, SHEN Y S. Computational fluid dynamics study of the flow and thermochemical behaviors of a carbon composite briquette in an ironmaking blast furnace[J]. Energy and Fuels, 2019, 33(11): 11603. [27] 王宏涛, 储满生, 赵伟, 等. 热压铁焦对高炉综合炉料熔滴性能的影响[J]. 东北大学学报:自然科学版, 2016, 37(8):1108. (WANG Hong-tao, CHU Man-sheng, ZHAO Wei, et al. Effect of iron coke hot briquette on softening-melting and dripping properties of blast furnace mixed burden[J]. Journal of Northeastern University: Natural Science, 2016, 37(8): 1108.) [28] 王宏涛, 储满生, 鲍继伟, 等. 碳铁复合低碳炼铁炉料制备与应用研究[J]. 钢铁研究学报, 2019, 31(2): 103. (WANG Hong-tao, CHU Man-sheng, BAO Ji-wei, et al. Research on preparation and application for a new burden of iron-carbon agglomerate for low carbon blast furnace ironmaking[J]. Journal of Iron and Steel Research,2019, 31(2): 103.) [29] WANG H T, CHU M S, ZHAO W, et al. Influence of iron ore addition on metallurgical reaction behavior of iron coke hot briquette[J]. Metallurgical and Materials Transactions B, 2019, 50(2): 324. [30] 毕学工, 马毅瑞, 李鹏, 等. 混装铁焦对人造富矿还原行为的影响[J]. 钢铁, 2014, 49(11): 9. (BI Xue-gong, MA Yi-rui, LI Peng, et al. Effect of iron coke mixed charging on agglomerates reduction behavior[J]. Iron and Steel, 2014, 49(11): 9.) [31] 程向明, 毕学工, 史世庄, 等. 铁焦与铁矿石混装对高炉初渣形成的影响[J]. 钢铁, 2014, 49(8): 9. (CHENG Xiang-ming, BI Xue-gong, SHI Shi-zhuang, et al. Effect of ferro-coke and iron ores mixing charging on primary slag formation in blast furnace[J]. Iron and Steel, 2014, 49(8): 9.) [32] 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, 2015, 45(6):731. (LIU Jian-guo, ZHANG Long-long, YUAN Chun-yang, et al. Effect of iron ore powder content on initial temperature of gasification reaction of iron-bearing coke prepared from shenfu coal[J]. Journal of Taiyuan University of Technology, 2015, 45(6):731.) [33] 谢全安, 魏侦凯, 郭瑞, 等. 焦炭热性质评价方法的研究进展[J]. 钢铁, 2018, 53(6): 1. (XIE Quan-an, WEI Zhen-kai, GUO Rui, et al. Present situation of evaluation method of coke thermal properties[J]. Iron and Steel, 2018, 53(6): 1.)
2020, Vol. 55 
