任英
,
张立峰
,
李燕龙
,
余乐
,
李刚
,
李军涛
钢铁研究学报
运用商业软件Ansys-Fluent,建立了1t钢包底吹氩与合金熔化扩散数值模型,其中钢包吹氩模型通过Wood'sMetal物理试验验证,吻合很好.研究采用数值模拟与现场试验相结合的方法分析了钢包内流场与合金加入的位置及方式对合金在钢包内扩散的影响.结果表明:260L/min吹氩流量过大,且吹氩时间过长(120s),建议使用100 L/min的吹氩流量,加合金前吹氩时间30s,使Al块熔化与混均,保护合金,加合金后吹氩30s,降低合金的烧损.合金采用加入棒固定,在吹氩口上方加入后保持3～5 s,熔化时间能由6.2s降低至2.0s,混匀时间能由35s降低至23s.另外,在降低烧损的同时,减少吹氩量和温降,起到节能减排的作用.
关键词:
钢包
,
底吹氩
,
合金
,
混匀时间
,
数值模拟
H. Lei
,
M. Y. Zhu and J.C. He (School of Materials and Metallurgy
,
Northeastern University
,
Shenyang 110006
,
China)
金属学报(英文版)
The study on the fluid flow, meniscus oscillation, slag entrapment in continuous casting mould was conducted mathematically and experimentally. The results show that the injection of argon into submerged nozzle enhances the meniscus oscillation, thus increases the probability of slag entrapment, and the critical argon blowing flow rate, which will give rise to slag entrapment, is around 10l/min. The trajectory of bubble is affected by the bubble diameter and the molten steel flow, and the bubble diameter is dominant. The bubble with diameter 1.4mm floats fastest with 0.47m/s terminal velocity.
关键词:
continuous casting mould
,
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,
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,
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