摘 要 基于相似理论，利用物理模型研究了高拉速吹氩条件下结晶器内的卷渣行为，考察了工艺操作参数对结晶器内液面波动和卷渣行为的影响。研究结果表明：在结晶器水口吹气条件下，大气泡对渣层的卷混是引起卷渣的主要方式，其次是漩涡卷渣，通常认为的剪切卷渣则不易发生。此外，本研究还对各种卷渣行为进行了分析，揭示其内在机理，提出了避免卷渣的措施。
ABSTRACT A physical model was established to study the mechanism of molten slag behavior in slab continuous casting mould with high casting speed and argon blowing, and the effects of operation parameters on the liquid surface level oscillation and the slag entrapment were investigated. The results showed that slag entrapment was mainly caused by the turbulent large bubbles at the interface of slag and molten steel in mould with high casting speed and gas bubbling, and the vortex at the surface also was the way to cause slag entrapment, but there is no phenomenon of entrapment occurring due to high shear stress that was mentioned the main reason previously. In addition, the behavior and mechanism of typical slag entrapment were discussed, and the measures to eliminate slag entrapment were also presented.
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