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连铸结晶器内钢液流动的控制直接影响板坯及其产品的表面及内部质量。尽管结晶器内钢液流动缘于水口钢液流动,然而很少有人研究浸入式水口内的钢液流动。本研究中,用易熔合金模型和熔钢模型通过透明浸入式水口直接观察浸入式水口内钢液流动状况。其次,测量了商用结晶器弯月面排出的氩气。在易熔合金模型实验中,位势流和塞流的出现均与氩气流速、熔融金属流速及水口直径有关。减小氩气流速、增加熔融金属流速和减小水口直径会导致水口内弯月面高度上升。通过透明石英玻璃水口观察钢水流动。位势流和塞流的出现也都与氩气流速有关。通过对结晶器弯月面净氩气流速的测量,熔钢系统中,从上滑板吹入的氩气约20%被带入水口中。因此得出结论:在传统板坯结晶器中,钢水一定充满浸入式水口,并且在普通操作中,钢流一定像塞流。
The control of molten steel flow in continuous casting mold directly affects the surface and internal quality of slab and its products. Although the flow of molten steel in the mold is due to the flow of molten steel in the nozzle, few studies have investigated the flow of molten steel in the immersed nozzle. In this study, the flow of molten steel in the submerged entry nozzle was directly observed through the transparent immersion nozzle using the fusible alloy model and the molten steel model. Second, argon gas from the meniscus of the commercial crystallizer was measured. In the fusible alloy model experiment, both the potential flow and the plug flow are related to the argon flow rate, the flow rate of the molten metal and the diameter of the nozzle. Reducing the argon flow rate, increasing the flow rate of the molten metal, and decreasing the nozzle diameter will result in an increase in the meniscus height in the nozzle. Through the transparent quartz glass nozzle to observe the flow of molten steel. The emergence of potential flow and plug flow are also related to argon flow rate. By measuring the net argon flow rate on the meniscus of the mold, about 20% of the argon gas blown in from the upper slide is taken into the nozzle in the molten steel system. It follows that in conventional slab molds, the molten steel must be filled with submerged entry nozzles, and in normal operation the steel flow must be plug flow.