欢迎访问《图学学报》 分享到：
图学学报

图学学报

• 数字化设计 • 上一篇    下一篇

超音速氧气射流对电弧炉熔池作用

  

  • 出版日期:2013-02-27 发布日期:2015-06-10

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

  • Online:2013-02-27 Published:2015-06-10

PDF (PC)

190

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：
2 0.0004 * 0.0932 。

关键词: 电弧炉, 氧气射流, 三相流, 数值模拟

Abstract: 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:
2 0.0004 * 0.0932 .

Key words: electric arc furnace, oxygen jet, three-phase flow, numerical simulation