Water Modeling on Gas Blowing in Tundish and Slag Entrapment
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摘要: 以某钢厂中间包为原型，建立与原型尺寸为1∶3的水模型，研究中间包采用气幕挡墙时，流体流动行为及钢渣卷混现象，考察吹气量和气体在流体中行程对钢渣界面的影响规律。研究表明：正常浇铸条件下避免钢液卷渣的临界吹气量在0.14 m3/h，中间包液面出现渣眼的临界吹氩量为0.10~0.12 m3/h，超过临界吹气量后，渣眼加速扩增。Abstract: According to tundish prototype at steel work, the water model with linear scale ratio 1:3 of model and prototype has been established.Fluid flow behavior and entrapment phenomenon at the interface between slag and metal in tundish with gas curtain were studied by water model, the effect of gas flow rate and the distance of gas travel in fluid on slag/metal interface was surveyed.In normal moulding conditions, to avoid slag entrapment, the critical gas flow rate is 0.14 m3/h, and to avoid slag blow hole, the critical gas flow rate is 0.10~0.12 m3/h, if it exceeds the critical gas flow, the slag blow hole will expand at larger speed.
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Key words:
- tundish /
- gas curtain /
- water model /
- argon blowing /
- slag entrapment /
- slag blow hole
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