超音速氧气射流对电弧炉熔池作用三相流数值模拟研究  

Three-phase numerical simulation of oxygen jet impinging on molten steel bath in EAF

作　　者：陈绍春[1,2] 李京社[2] 朱荣[2] 何春来[2] 

机构地区：[1]福州大学机械工程及自动化学院,福建福州350001 [2]北京科技大学冶金与生态工程学院,北京100083

出　　处：《图学学报》2013年第1期66-70,共5页Journal of Graphics

基　　金：福州大学科技发展基金资助项目(022455)

摘　　要：论文利用Fluent 6.3,通过对某钢厂150t电弧炉冶炼过程中不同供氧流量下超音速氧气射流冲击熔池流场进行三维三相流数值模拟,研究电弧炉熔池在炉壁侧吹氧枪作用下的流场分布及其变化情况,探讨超音速氧气射流对电弧炉熔池的作用。研究表明氧气射流冲击熔池引发钢液渣液流动波动,流动速度(冲击动能)以波的形式由冲击点向熔池中心传递。熔池的速度场分布呈现"周围高、中心低,表层高、底部低"的趋势;由于射流的作用,熔池内部生成涡流。涡流中心是钢液循环的中心,对钢液循环流动速度场有重要作用。随着供氧流量的增加,涡流中心越远离氧枪,且在熔池中越深;氧气射流在熔池表面生成的冲击凹坑在渣层中间横截面的冲击面积S(m2)和供氧流量QO2(m3/h)成线性关系,可表示为:S=0.0004*QO2-0.0932。By Fluent 6.3, this paper develops a mathematical model of three-dimensional and three-phase flow in the molten bath of EAF with side accessorial oxygen lance to study the transient phenomena of jet impingement on molten steel. The simulation result shows that the impingement of the supersonic oxygen jet will cause impact dent on the molten steel surface, will inspire wave of the molten bath surface from the dent centre to the bath center, and will cause vortexes under bath which become the centre of molten steel circumfluence. The velocity of flowing molten steel under the oxygen lance or around furnace wall will be faster than that at the center of bath. With oxygen jet enhance, the center of vortexes will be more apart from the impingement point of jet and will be lower to the bottom of bath. The area of impact dent S （m2） is almost in linear relationship with flow rate of jet Qo2 （m3/h）, in direct proportion. After consulting, the relationship between the area of impact dent and flow rate of jet can be expressed by the following mathematical equation： S=0.0004＊Q0,-0.0932.

关 键 词：电弧炉 氧气射流 三相流 数值模拟 

分 类 号：TF741[冶金工程—钢铁冶金]