氧气射流作用下的电弧炉熔池两相流数值模拟  

Two-phase Mathematical Model of Oxygen Jet Impinging on Molten Steel Bath Surface in EAF

作　　者：王广连[1,2] 朱荣[1] 何春来[1] 

机构地区：[1]北京科技大学冶金与生态工程学院,北京100083 [2]山东莱芜钢铁集团,山东莱芜271104

出　　处：《过程工程学报》2010年第4期625-631,共7页The Chinese Journal of Process Engineering

基　　金：国家十一五科技支撑计划基金资助项目(编号:2008AF33B01)

摘　　要：建立了单氧枪供氧强度为3000m3/h时炉壁氧气射流冲击电弧炉熔池的三维两相流数值模型.流体动力学数值模拟结果表明,在超音速射流作用下,熔池中形成的涡流促进了钢液循环流动,涡流中心位置处于液面下0.3m、距熔池中心1.6m处,位于氧枪轴线上、涡流中心以下的钢液流的速度呈分段线性分布.竖直方向每降低1cm,熔池中下部的钢液速度降低0.0015~0.002m/s,靠近炉底的钢液速度降低0.006~0.007m/s.熔池表层钢液直接受射流的冲击作用,在喷吹初期钢液速度即可达0.1~0.5m/s,之后基本不变;熔池中下部和偏心炉底区钢液速度最低,速度随喷吹时间增加而增加.A mathematical model of three-dimensional and two-phase flow in the molten bath of EAF has been developed to clarify the transient phenomena of oxygen impingement on molten steel when the flow rate of a single lance is 3000 m3/h.The simulation result shows that vortexes in bath form under the impingement of supersonic jet,which promotes the circulating flow in bath.The center of vortexes is located at 0.3 m deep in bath and 1.6 m far away from the center of bath.The velocity of molten steel on the axis of lances and under the center of vortexes is in piecewise linear relationship with Z position.With 1 cm decrease in the value of vertical Z axis,the velocity magnitude decreases 0.0015~0.002 m/s in the middle-lower section of bath,and 0.006~0.007 m/s in the section next to the furnace bottom.At the beginning of impinging of oxygen jet,the velocity of molten steel on the top surface of bath is between 0.1 and 0.5 m/s and does not increase with the time of impinging of jets.However,the velocity of molten steel at the central and eccentric bottom which is the slowest in the whole bath increases with impinging time.

关 键 词：电弧炉 氧气射流 两相流 数值模拟 

分 类 号：TF741[冶金工程—钢铁冶金]