气泡尾流去除钢液中夹杂物机理的水模型研究  

A Study of Water Modelling on Mechanism of Removal of Inclusions in Molten Steel by Bubble Wake

作　　者：杨虎林[1,2] 何平[1] 翟玉春[2] 

机构地区：[1]钢铁研究总院冶金工艺研究所,北京100081 [2]东北大学材料与冶金学院,沈阳110004

出　　处：《特殊钢》2014年第1期15-18,共4页Special Steel

基　　金：国家科技支撑计划课题基金项目资助(2012BAE03B01)

摘　　要：采用水模型和高速摄像机研究了气泡尾流去除夹杂物的过程,分析了气泡尾流去除夹杂物的规律和气泡大小及夹杂物的尺寸和浓度对气泡尾流去夹杂的影响。结果表明,气泡尾流有利于促进夹杂物上浮;气泡尾流中存在尾流边界区和上升区;尾流去除夹杂物的过程分为3个子过程:(1)夹杂物靠近和进入气泡尾流边界区产生扰动;(2)进入气泡尾流上升区和(3)夹杂物继续上升或脱离气泡尾流上升区;气泡直径D_b和粒子浓度C_p增大有利于尾流去夹杂;粒子直径D_p越小越容易被尾流去除。The removing process of inclusions by bubble wake in steel has been studied by using water model and high speed video recorder and the rule of inclusions removing through bubble wake and the effect of bubble size and inclusion size and concentration on inclusions removing by bubble wake are analyzed. Results show that the bubble wake is favoura- ble to promote the inclusions floating off; there are boundary zone and rising zone in bubble wake; the removing process of inclusions has three sub-processes ： （ 1 ） inclusions approaching and entering into the boundary zone to produce disturb- ance, （2） entering into the bubble wake rising zone and （3） inclusions going on rising up or escaping from bubble wake rising zone to float off; with increasing bubble diameter Db and particle concentration Cp are available to remove inclusions in steel by bubble wake; the smaller the particle diameter Dp, the easier the inclusions to be remove by bubble wake.

关 键 词：气泡尾流 夹杂物去除 机理 钢液 水模拟 非金属夹杂物 

分 类 号：TF703[冶金工程—钢铁冶金]