材料期刊网

针对氩气泡在板坯连铸结晶器中的运动行为，以190mm×1900mm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1.7m/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。

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 190 mm×1900 mm 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.