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依据相似原理,考虑了气液流动之间的相互影响和实际吹氩时的高温膨胀,采用修正弗劳德准数对现场吹氩量和实验吹气量之间进行相似转换,并推导出四种常用的模拟气体与现场吹氩量之间的换算关系.以断面为210mm×900mm的结晶器为原型,采用0.6∶1的缩小水模型对现场实际工况条件进行模拟.结果表明,模拟与现场情况能够较好的吻合.当模型水流量为3.80m3.h-1、吹气量为0.93L.min-1时,气泡在结晶器内分散均匀,气泡逸出不会造成过大液面波动;当水流不变、吹气量增加到2.79L.min-1时,气泡聚集在水口周围上浮,水口周围波动剧烈,渣层出现裸露.模拟现象与现场浇注现象的相似性验证了吹气量相似转换的正确性.
Based on the principle of similarity, considering the interaction between gas and liquid flow and the high temperature expansion during argon blowing, a similar conversion between the amount of argon blowing in the field and the experimental blowing volume was made by using the modified Froude quasi-number, The relationship between the commonly used simulated gas and on-site argon bubbling was studied.A model of 210mm × 900mm section was taken as the prototype and the 0.6:1 shrinkage water model was used to simulate the actual working conditions in the field.The results showed that the simulation and field When the model water flow rate is 3.80m3.h-1, the blow volume is 0.93L.min-1, the bubbles are uniformly dispersed in the crystallizer, the bubble escape will not cause excessive liquid level fluctuations; When the water flow is constant and the inflow rate increases to 2.79L.min-1, the air bubbles gather around the nozzle, the water around the nozzle fluctuates violently, and the slag layer appears naked. The similarity between the simulation and the on-site pouring proves that the air- Correctness