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对冷坩埚中钢液凝壳熔炼工艺进行了研究,介绍了冷坩埚中凝壳熔炼工艺避免被坩埚材料污染、节能、产品质量好等优点及凝壳形成过程的凝固机理;在理论基础上建立了冷坩埚熔炼感应凝壳的热平衡模型,在实验条件下,对凝壳厚度作出了计算,分析了水冷导热量和感应加热功率两个因素对凝壳厚度的影响。结果表明,在实验条件下,当水冷导热量为8.8 J/s,感应功率为8.8 kW时,最适宜凝壳厚度为1.1 cm,保证冷坩埚熔炼顺利进行。
The molten steel crusts melting process in cold crucible was studied. The advantages of solidified crust melting process in the cold crucible, such as avoidance of contamination by the crucible material, energy saving, good product quality and solidification mechanism of the crust formation process, were introduced. On the basis of the theory, The thermal equilibrium model of induction crucible with cold crucible is established. Under the experimental conditions, the thickness of the condensate shell is calculated. The effects of water cooling heat transfer and induction heating power on the thickness of the condensate shell are analyzed. The results show that under the experimental conditions, when the thermal conductivity of water is 8.8 J / s and the induction power is 8.8 kW, the optimal thickness of the condensed shell is 1.1 cm, which ensures smooth smelting of cold crucible.