130 t直流电弧炉喷吹过程的优化模拟  

Optimization simulation of injection process in 130 t DC electric arc furnace

作　　者：王丹 郭志红[3] 霍彦朋 范建通[4] 朱立光 WANG Dan;GUO Zhi-hong;HUO Yan-peng;FAN Jian-tong;ZHU Li-guang(School of Metallurgy and Energy,North China University of Science and Technology,Tangshan 063000,Hebei,China;Hebei High Quality Steel Continuous Casting Engineering Technology Research Center,Tangshan 063000,Hebei,China;School of Materials Science and Engineering,Hebei University of Science and Technology,Shijiazhuang 050018,Hebei,China;Converter Steelmaking Plant,Shijiazhuang Iron and Steel Co.,Ltd.,Shijiazhuang 050031,Hebei,China)

机构地区：[1]华北理工大学冶金与能源学院,河北唐山063000 [2]河北省高品质钢连铸工程技术研究中心,河北唐山063000 [3]河北科技大学材料科学与工程学院,河北石家庄050018 [4]石家庄钢铁有限责任公司转炉炼钢厂,河北石家庄050031

出　　处：《钢铁》2022年第2期46-53,共8页Iron and Steel

基　　金：国家自然科学基金资助项目(51974102);河北省重点研发项目资助项目(19211009D)。

摘　　要：在当今经济健康发展的背景下,电弧炉炼钢凭借其污染小、流程短和产品多样的特点,已逐渐成为各大钢铁企业大力发展的对象,在整个钢铁生产的地位比以往的每个时候都要重要,而电弧炉熔池的流动状态会直接影响电弧炉的冶炼效果,这主要与氧枪喷吹强度和布置方式有关。为研究不同工况条件下电弧炉流场的变化,为大型电弧炉选取最合适的工艺参数,以某厂130 t电弧炉为原型,建立了电弧炉侧吹水模型和三维全尺寸几何模型,利用冷态水模拟和数值模拟的方法,将混匀时间、平均速度、湍动能分布、死区及弱流区体积比作为判断依据,对130 t电弧炉不同喷吹强度和不同布置方式对流场的影响进行了系统研究。研究结果表明,当氧枪布置方式为C时,氧枪对熔池中下部的搅拌效果明显增强,混匀时间明显减少,死区及弱流区比例减少,与布置方式A相比分别减少了3.8%和9%;在对氧枪喷吹强度的研究中发现,熔池混匀时间随着喷吹强度的增大逐渐减少,但减少的幅度降低;当氧枪喷吹强度为0.31 m^(3)/(t·min)时,熔池内流体湍动能最大,熔池内钢液面下100、400 mm处横截面的平均速度分别增加42.9%和31.4%,加快了冶炼过程中的能量传递。Under the background of healthy economic development,EAF steelmaking has gradually become the object of vigorous development of major iron and steel enterprises with its characteristics of low pollution,short process and diverse products.It plays an important role in the whole iron and steel production than ever before,and the flow state of EAF molten pool will directly affect the smelting effect of EAF.It is mainly related to the injection intensity and arrangement of oxygen lance.In order to study the change of flow field of electric arc furnace under different working conditions and select the most appropriate process parameters for large electric arc furnace,taking a 130 t electric arc furnace in a plant as the prototype,the side blowing model and three-dimensional full-scale geometric model of electric arc furnace are established.The mixing time,average velocity,turbulent kinetic energy distribution.Based on the volume ratio of dead zone and weak flow zone,the effects of different injection intensity and arrangement on the flow field of 130 t electric arc furnace were systematically studied.The results show that when the arrangement of oxygen lance is C,the stirring effect of oxygen lance on the middle and lower parts of molten pool is significantly enhanced,the mixing time is significantly reduced,and the proportion of dead zone and weak flow zone is reduced,which is 3.8%and 9%respectively compared with the arrangement of A.In the study of oxygen lance injection intensity,it is found that the mixing time of molten pool decreases gradually with the increase of injection intensity,but the reduction range decreases.When the oxygen lance injection intensity is 0.31 m^(3)/(t·min),the turbulent kinetic energy of the fluid in the molten pool is the largest.The average velocity of the cross section at 100 and 400 mm below the steel liquid level in the molten pool increases by 42.9%and 31.4%respectively,accelerating the energy transfer in the smelting process.

关 键 词：大型电弧炉 流场 冷态水模拟 数值模拟 侧吹 

分 类 号：TF741.5[冶金工程—钢铁冶金]