| ABSTRACT: With the development and optimization of the continuous casting(CC)technology, the requirement of quality for the ingot or casting become higher and higher,which ismainly affected.Mold is one of the most important parts of the continuous casting machine, itsinternal liquid steel flow and temperature change directly affects the quality of the billet. Thephysical and mathematic simulation methods were widely taken to research the rule of flowpattern. The velocity field and the temperature field will be influenced by nozzle parameters. Inaddition, improper operation will also cause the nozzle rotate or off-center, it will influence flowand temperature field.In this paper, a three-dimensional numerical model is established using the commercialsoftware for continuous casting mold molten steel flow and meticulous research, which size in380×280. Mathematical simulation research mainly in the following and temperature phenomenoninfluenced by the casting speed, the nozzle immersion depth and the nozzle off-center distance.Based on the Similarity criteria, series physical modeling experiments have been carried out toinvestigate the mechanisms of metallurgical behavior in billet mould of continuous caster. DJ800hydraulic experiment system was applied to measure the wave amplitude.The main mode of thesteel flowing and the influences of the technique parameter to metallurgical behavior have beenobtained in this paper.The results tell us that: the casting speed and the nozzle immersion depth influenced theflow strength and the impulse depth, and the off-center deviation from the mold the flow ofmolten steel has a great impacted on the casting quality. The nozzle inner diameters influence thetemperature field more than the flow field. |
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