Abstract: The behavior of liquid level and flowage in 220 mm x 1 300 mm slab mold with casting speed 1. 4 ~2. 4 m/min during submerged nozzle clogging and argon blowing has been studied by water model. The results showed that during nozzle clogging course the streams at both side of nozzle were asymmetric, the size of bubble decreased and the depth of bubbles penetration in mold increased to induce slag entrapment and to increase slab defect produced by bubbles obviously.

Key words: Slab, Mold, Nozzle Clogging, Bubble, Liquid Level Oscillation, Flowage

摘要： 用水模型研究拉速为1.4 ~2.4 m/min的220 mm x 1 300 mm板坯连铸结晶器浸入式水口发生 堵塞和吹氧时，结晶器内的液面与流动行为。结果表明，水口发生堵塞时，水口两侧的流股不对称，气泡的平 均直径减小，气泡进入结晶器的深度增加，引发卷渣和气泡缺陷的机率将明显增加。