连铸结晶器内钢液流场的水模型研究

A Study on Flow Field of Liquid in Concasting Mold by Water Model Testing

采用1:1水模型研究了260 mm×300 mm坯连铸结晶器中钢液在拉速0.5～0.8 m/min、浸入深度90～120 mm和5种水口结构时的流场。试验结果表明,合理的水口结构有利于降低冲击深度,现有的直筒型水口过大,优化后的水口可使冲击深度降低30%～40%;随拉速增大,冲击深度增加,而浸入深度对冲击深度影响不大。

The flow field of liquid steel in 260 mm× 300 mm casting mold with casting speed 0. 5 - 0. 8 m/min, submerged nozzle depth 90 - 120 mm and 5 kinds of nozzle structure has been studied by 1 ： 1 water model. Test results show that reasonable nozzle structure is available to decrease the impacting depth, present nozzle has larger impacting depth and the optimized nozzles may decrease the impacting depth by 30% -40% ; with increasing casting speed the impacting depth increases while the immerged nozzle depth on impacting depth isn＇ t obvious.