变角氧枪对熔池弱搅拌区影响的数值模拟研究  

Numerical Simulation of Death Zones in Bath under Impact of Variable Angle Oxygen Lances

作　　者：迟洪亮[1] 李俊国[1] 冯帅[1] 

机构地区：[1]河北联合大学冶金与能源学院,河北唐山063009

出　　处：《钢铁钒钛》2014年第6期91-96,共6页Iron Steel Vanadium Titanium

基　　金：河北省自然科学基金资助项目(No.E2012401063)

摘　　要：针对唐钢50 t转炉冶炼条件,采用Fluent软件对氧气射流—钢液两相间相互作用进行了数值模拟研究,分析了变角氧枪作用下熔池内钢液流场、枪位及喷孔倾角对弱搅拌区比率的影响规律,为变角氧枪结构优化提供了理论依据。结果表明:与非变角氧枪相比,变角氧枪作用下钢液流场更均匀;熔池底部存在弱搅拌区,随着枪位的提升,熔池弱搅拌区比率有所增加;除喷头F外,研究的变角氧枪作用下熔池的弱搅拌区比率普遍低于非变角氧枪;在同一枪位下,与对角喷孔倾角相差0.5°相比,对角喷孔倾角相差1°时,熔池内弱搅拌区比率更低;在研究的9个喷头中,喷头D(11°/12°)作用下熔池内弱搅拌区比率最小。Based on technological conditions of 50 t converter melting at Tangshan Iron ＆Steel corp., thenumerical simulation of two-phase flow between oxygen gas jet and liquid steel in the bath has been car-ried out by Fluent software where the flow field of liquid steel in the bath impacted by the oxygen gas jetsprayed by the variable angle oxygen lances and non-variable angle lance, and the influence of lance lev-el and the inclining angle on the proportion of death zones have been analyzed for the purpose of providingtheoretical base for optimization of the oxygen lance configuration. It was found that the flow field of thebath impacted by the gas jet sprayed from the variable angle oxygen lance was more homogeneous thanthat by the non-variable angle oxygen lances. Death zones occurred at the bottom of the molten bath. Theproportion of death zones increased with the increase of the lance level. Except for lance F, the propor-tions of death zones impacted by variable angle oxygen lance were lower than that by non-variable oxygenlance at the same lance level. Compared with the differential value 0.5° between the opposite incliningangle, variable angle oxygen lance with the differential value 1.0° led to lower proportions of death zonesin the molten bath Moreover, among the 9 sprayers investigated in this paper, the proportion of deathzones impacted by the sprayer D with the inclining angle 11° and 12° is the lowest.

关 键 词：转炉 炼钢 变角氧枪 弱搅拌区 枪位 喷孔倾角 数值模拟 

分 类 号：TF711[冶金工程—钢铁冶金]