30 t VOD钢包冶炼不锈钢钢液流动模拟研究  

Research on molten flow simulation of 30 t VOD ladle smelting stainless steel

作　　者：李明林[1] 陈列[1] 寇玉山[1] 代卫星 成国光 LI Ming-lin;CHEN Lie;KOU Yu-shan;DAI Wei-xing;CHENG Guo-guang(Xining Special Steel Co.,Ltd.,Xining 810005,Qinghai,China;State Key Laboratory of Advanced Metallurgy,University of Science and Technology Beijing,Beijing 100083,China)

机构地区：[1]西宁特殊钢股份有限公司,青海西宁810005 [2]北京科技大学钢铁冶金新技术国家重点实验室,北京100083

出　　处：《钢铁研究学报》2018年第11期881-887,共7页Journal of Iron and Steel Research

摘　　要：以西宁特钢30tVOD冶炼不锈钢为工艺背景,采用数值模拟与物理模拟相结合的研究方法,研究了顶底复吹条件下30tVOD钢包精炼过程中钢液流动及混匀特性。水模拟实验分析了钢包在底吹及复吹条件下的钢液混匀特性,数值模拟分析了不同复吹条件下钢液的流场特征。研究结果表明:当钢包底吹位置为1/4R(R为钢包底部半径)时,钢液既有最佳的复吹混匀效果,又有较好底吹混匀效果,其混匀时间相比中心位置分别降低46%、14%;钢液流场及湍流动能分析结果表明,当底吹位置1/4R时,在熔池液面区,顶吹与底吹二者作用于钢液形成流动的方向吻合程度较好,且熔池内部钢液活跃体积比高于其他吹气位置,其横截面活跃面积可达47%,结合实际冶炼效果对比,钢包底吹位置1/4R处为VOD钢包的最佳吹气位置。30tVOD ladle smelting stainless steel was used as the process background,and the numerical and physical simulations were applied to investigate the flow and mixing characteristics of molten steel during the 30tVOD refining process.The cold experiment was employed to investigate the mixing behaviors of molten steel under the bottom and combined blowing systems.The flow features of molten steel were analyzed by numerical simulation with different blowing conditions.The results show that when the plug position of the ladle is located on 1/4R(R is the radius of ladle bottom),whether top-bottom blowing or bottom blowing,the molten steel is mixed well,and mixing time compared to the central position is reduced by 46% and 14% respectively.In addition,the comparison of flow field and turbulent kinetic energy of the molten steel show that when the bottom blowing position is 1/4R, the flow direction of the molten steel caused by the top blowing and the bottom blowing is better near the bath surface,and active volume ratio of molten steel is higher than that of other blowing positions.Current results were validated in industriai VOD furnace,which indicates that 1/4R is regarded as the optimum injection position for combined stirring.

关 键 词：VOD精炼 不锈钢 数值模拟 物理模拟 吹气位置 

分 类 号：TF764.1[冶金工程—钢铁冶金]