Abstract A transient coupled mathematical model was established to study the oxygen transfer in electroslag remelting process. The electromagnetics, multiphase flow, heat transfer, mass transfer and species transport were simulated simultaneously with the aid of the finite volume method. The volume of fluid approach was employed to determine the interfaces among the slag, metal and air. An additionally kinetic and thermodynamic model was proposed to predict the mass transfer rates, which were related to the composition of each phase as well as the temperature. A laboratory experiment was carried out to validate the accuracy of the model. The increase of oxygen content in metal is primarily achieved during the formation of droplet, and the mass transfer process at the slag/metal pool interface also contributes to it. The oxygen in air is absorbed into slag causing a rise in oxygen potential of slag, which significantly affects the oxygen content in metal. With the increasing content of ferrous oxide in slag, the mass fraction of oxygen in the metal pool first increases and then flattens out with time. The maximum calculated oxygen content in the metal pool is about 123.52 ppm during the ESR process.

中文翻译：

---

电渣重熔过程中氧传递的耦合数学模型

摘要 建立了瞬态耦合数学模型，研究了电渣重熔过程中氧的转移。借助有限体积法同时模拟电磁学、多相流、传热、传质和物质传输。采用流体体积法来确定炉渣、金属和空气之间的界面。还提出了一个额外的动力学和热力学模型来预测传质速率，这与每个相的组成以及温度有关。进行了实验室实验以验证模型的准确性。金属中氧含量的增加主要是在液滴形成过程中实现的，渣/金属池界面处的传质过程也有贡献。空气中的氧气被炉渣吸收，使炉渣的氧势升高，对金属中的氧含量有显着影响。随着炉渣中氧化亚铁含量的增加，金属熔池中氧的质量分数随时间先增加后趋于平缓。在 ESR 过程中，金属池中计算出的最大氧含量约为 123.52 ppm。