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首页> 外文期刊>ISIJ international >Fluid Flow Behavior in Submerged Entry Nozzle of Continuous Casting
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Fluid Flow Behavior in Submerged Entry Nozzle of Continuous Casting

机译：连续铸件浸入式注口的流体流动行为

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摘要

A fluid flow control of molten steel in continuous casting mold directly leads to surface and internal quality of slab and product. However, few studies have looked at fluid flow in submerged entry nozzle even when it is a source of flow in the mold. In this study, fluid flow in submerged entry nozzle is in-situ observed through transparent immersion nozzle by a fusible alloy model and a steel flow model. Subsequently, argon gas extract from mold meniscus is also measured at commercial caster.rnIn the fusible alloy model experiment, both potential flow and plug flow emerged depending on argon flow rate, metal flow rate and nozzle diameter. Decreasing argon flow rate, increasing metal flow rate and reducing nozzle diameter leads to a rise of meniscus height in nozzle.rnMolten steel flow was observed through transparent silica glass nozzle. Both potential-flow and plug-flow also emerged depending on argon flow rate.rnAccording to measurement of net argon flow rate through mold meniscus, about 20% of argon gas injected from upper sliding plate is brought into nozzle at molten steel system.rnTaking these experimental results into consideration, it is concluded that in conventional slab caster, submerged entry nozzle must be filled with molten steel and steel flow must be like plug-flow during usual operation.
机译：连铸结晶器中钢水的流体流量控制直接导致板坯和产品的表面和内部质量。但是，很少有研究关注浸入式喷嘴中的流体流动，即使它是模具中的流动源。在这项研究中，通过可熔合金模型和钢流模型，通过透明浸入式喷嘴就地观察了浸入式喷嘴中的流体流动。随后，在商用连铸机上也测量了从弯月面提取的氩气。在可熔合金模型实验中，势能流和塞流都取决于氩气流量，金属流量和喷嘴直径而出现。降低氩气流量，增加金属流量和减小喷嘴直径会导致喷嘴内弯液面高度上升。rn通过透明石英玻璃喷嘴观察到钢水流动。根据氩气流量的不同，势能流和活塞流也都会出现。rn根据测量通过弯月面的净氩气流量，从上滑板注入的氩气中约有20％进入钢水系统的喷嘴。考虑到实验结果，得出的结论是，在常规的板坯连铸机中，浸入式注嘴必须充满钢水，并且在正常操作期间钢流必须像塞流一样。

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