Abstract:Firstly, the development of the hot metal pretreatment, BOF steelmaking, steel secondary refining and continuous casting motivated by the science and technology progress was summarized and exampled. The conventional KR hot metal pretreatment process was improved by injecting the desulfurization flux powders through a lance with carrying gas so that powder particles penetrated the hot metal deeper and the coagulation of particles less occurred and the desulfurization efficiency was improved. During the production of the stainless steel through BOF process, a second lance was used to low Cr-ore powders with carrying burning gas and oxygen gas, through which the oxidation of the Cr was lowered and the required temperature was reached as well. The progress of the steel secondary refining was fully supported by technologies of argon blowing, vacuum techniques and electromagnetic techniques. The defect-free continuous casting semis was achieved with the support of electromagnetic stirring, mechanical reduction and digital technology. Secondly, the future of steelmaking was forecasted, including the limit of the steel cleanliness, future steelmaking technologies and continuous steelmaking process. Currently, the control level of oxygen, carbon, nitrogen, phosphorus, sulfur and hydrogen in the steel was as low as 0.006 0% while techniques for the removal of zinc, tin, lead, antimony, bismuth and arsenic from the steel need to develop. With the development of information and automatic technologies, the intelligent BOF steelmaking without splashing and unmanned situation can be achieved in the future. The big data technology, software technology and the cyber physical system have been tentatively employed in advanced steel plants. In Europe, the reduction of mineral iron ores by pure hydrogen has been tried in pilot scale. With development of the scientific and technology progress, the continuous steelmaking will become reality within future 50 years. At last, the future fundamental studies on steelmaking were briefly predicted. The multiscale, multiphase and multicomponent physical phenomena of steelmaking will be focused through first-principles calculations, the steel grade design based on the material gene calculation, the thermodynamics and kinetics of physical and chemical reactions coupling fluid flow, heat transfer and solidification of the steel.
张立峰. 炼钢技术的发展历程和未来展望(Ⅱ)——炼钢的未来展望[J]. 钢铁, 2023, 58(1): 1-12.
ZHANG Li-feng. Development history and future prospects of steelmaking (Ⅱ)—Future prospects[J]. Iron and Steel, 2023, 58(1): 1-12.
[1] Miki Y, Watanabe K, Oshima K. Progresses and future prospects of steelmaking technologies[J]. JFE Technical Report, 2017, 22: 73. [2] 赵艳宇. KR 铁水脱硫过程模拟仿真及工业试验研究[D]. 北京:北京科技大学, 2022.(ZHAO Yan-yu. Mathematical Simulation and Industrial Trials on the KR Hot Metal Desulfurization Process[D]. Beijing: University of Science and Technology Beijing, 2022.) [3] Kitamura S, Naito K, Okuyama G. History and latest trends in converter practice for steelmaking in Japan[J]. Mineral Processing and Extractive Metallurgy, 2019, 128(1/2): 34. [4] Semura K, Matsuura H. Past development and future prospects of secondary refining technology[J].Tetsu-To-Hagane, 2014, 100(4): 456. [5] Tomono H. Development of steel continuous casting in Japan: Has bessemers dream come true?[J]. Ironmaking and Steelmaking, 2015, 42(4): 242. [6] Campbell P, Bledje W, Mahapatra R, et al. Recent progress on commercialization of castrip® direct strip casting technology at Nucor Crawfordsville[J]. Metallurgist, 2004, 48(9): 507. [7] 张立峰, 吴巍, 蔡开科. 洁净钢中杂质元素的控制[J]. 炼钢, 1996, 12(5): 36.(ZHANG Li-feng, WU Wei, CAI Kai-ke. Control of impurity elements in clean steel[J]. Steelmaking, 1996, 12(5):36.) [8] Wallner F, Fritz E. Fifty years of oxygen-converter steelmaking[J]. Metallurgical Research and Technology, 2002, 99(10): 825. [9] Holappa L. On physico-chemical and technical limits in clean steel production[J]. Steel Research International, 2010, 81(10): 869. [10] Akira K, Kazuo K, Kazuro T, et al. Development of utilization of digital data in JFE steel[J]. JFE Technical Report, 2021, 26: 1. [11] Birat J P. Alternative ways of making steel: Retrospective and prospective[J]. Metallurgical Research and Technology, 2004, 101(11): 937. [12] Ranzani C A, Wagner D, Patisson F. Modelling a new, low CO2 emissions, hydrogen steelmaking process[J]. Journal of Cleaner Production, 2013, 46: 27. [13] Peter J, Peaslee K D, Robertson D G C. Review of progress in developing continuous steelmaking[J]. Iron and Steel Technology, 2005, 2(2): 53. [14] Iwasaki T, Isobe Y, Fujikawa Y, et al. Behavior of components in the molten iron from the trough type continuous steelmaking furnace[J]. Tetsu-To-Hagane, 1989, 75(2):267. [15] Peter J, Peaslee K D, Robertson D G C, et al. Introduction of a novel, scrap-based, fully continuous steelmaking process[C]//AISTech 2005—Iron and Steel Technology Conference Proceedings. Charlotte, NC, United States:[s.n.], 2005: 623. [16] Peaslee K D, Peter J J, Robertson D G C, et al. Continuous Steel Production and Apparatus: USA, US20060272447A1[P/OL], 2006-05-05. [17] Yamamura K, Matsuzaki S, Toh T, et al. Development of mathematical science in steel industry[J]. Nippon Steel Technical Report, 2012, 101: 144.