Progress and prospects of low-carbon high-efficiency and intelligent steelmaking technologies for electric arc furnaces
The iron and steel industry is a major energy consumer and carbon emitter in China.Developing electric arc furnace(EAF)steelmaking process is an important path to achieve carbon peaking and carbon neutrality goals.Improving the EAF production efficiency is important for the developing of iron and steel industry.The technical bottleneck of low carbon,high efficiency and intelligent EAF steelmaking technologies are discussed,the develop-ment status of relevant technologies,the research progress of Baosteel Zhanjiang Steel zero carbon demonstration line and Baosteel EAF process to produce high-quality steel are introduced,and the future development direction of EAF steelmaking process is prospected.At present,production efficiency of EAF is increased by improving energy input,promoting chemical reactions,reducing energy and material consumption,carrying out solid waste recycling,and improving intelligence level.However,there are also a series of problems such as steel peroxide,ineffective removal of residual elements,low energy efficiency,lack of online detection and control methods,and unclear metal-lurgical reaction mechanisms.In the future,with the diversification of raw materials and the scaling up of EAF,the importance of improving energy efficiency,enhancing the stirring of the molten pool,improving the reactivity and foaming of slag and other technologies should be further emphasized.The optimization of related supporting equip-ment and the classification of scrap need to be further promoted.Replace manual operation and empirical judgment by advanced detection technologies and control models,can also help to improve production efficiency of EAF.Pro-moting the progress of related work and achieving efficient and low consumption production of high-quality steel in EAF is the only way for the iron and steel industry to transform and develop towards the future.
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