板坯连铸结晶器内氩气泡行为的模拟研究

来源期刊：钢铁2010年第4期

论文作者：陈登福 张献光 张立峰 靳星 温良英 张大江

文章页码：20 - 25

关键词：板坯连铸； 结晶器； 氩气泡； 物理模拟； 数值模拟

Key words：continuous casting； mold； argon bubble； physical simulation； numerical simulation

摘    要：针对氩气泡在板坯连铸结晶器中的运动行为,以190 mm×1 900 mm板坯连铸结晶器原型为研究对象,采用水力学模型及数值模拟的方法,重点研究了拉速为1.7 m/min时不同水口吹气量对结晶器内气泡大小、气泡分布、液面波动、渣-金行为等的影响。研究结果表明:随着水口吹气量增加,气泡尺寸逐渐增加,结晶器窄边气泡数量不断减少,气泡大都聚集在水口附近上浮,水口吹气量是引起乳化卷渣、水口附近液面裸露及卷渣等的主要因素。

Abstract: Aiming at the behavior of Argon Bubbles in Slab continuous casting mold with cast speed 1.7m/min,the influence of blowing argon flow rate on bubble size,bubble distribution,the liquid surface level oscillation and behaviors of slag-melt were investigated by using water model and numerical simulation,the 190mm×1900mm slab mold is taken as an object of study.The results show that with increasing gas flow rate in nozzle the size of bubbles in mold increased,the bubble numbers near the narrow face of the mold decreased and most of the bubbles float upward to the surface of the mold in regions around the submerged entry nozzle.The emulsified slag entrapment,metal level bareness and slag entrapment near the nozzle were mainly caused by blowing gas flow rate.