To improve the recycling efficiency of rejected electrolytic manganese metal (EMM) scrap that contains excessive sulfur, a high-temperature experiment and mathematical model reflecting the mechanism of sulfur transfer from the molten manganese metal to the molten slag were elaborated. A MoSi₂ electrical resistance furnace filled with argon protective gas was first employed to perform the desulfurization experiment at 1673 K (1400 °C). Four different fluorine slags with the CaO content ranging from 0 to 20 pct were used in the experiment. A mathematical model of the rejected EMM scrap desulfurization, based on the two-film theory, was established. It adequately described the thermodynamics and kinetics of the rejected EMM scrap desulfurization reaction. In particular, it captured the influence of the interfacial tension between the molten slag and molten manganese for the sulfur transfer process. A comparative analysis of measured and calculated results proved the model feasibility: it took into account the effects of the holding temperature, slag CaO content, the initial sulfur content in rejected EMM scrap, and slag/manganese mass ratio on the desulfurization efficiency. The results indicate that CaO could promote the desulfurization of the manganese metal. The sulfur removal ratio is 58.01 pct with a CaO-free slag at 1673 K (1400 °C), while the ratio increases to 84.58 pct if the CaO content rises to 20 pct. At higher temperatures, the CaO content in the slag can be appropriately reduced. High slag/manganese mass ratios were found to benefit the sulfur removal, while the CaO content in the slag could be adjusted according to the initial sulfur content in the rejected EMM scrap.

为了提高废弃的含硫量过多的电解金属锰废料的再循环效率，精心设计了一个高温实验和数学模型，反映了硫从熔融金属锰转移到熔融炉渣中的机理。MoSi ₂首先使用充满氩气保护气体的电阻炉在1673 K（1400°C）下进行脱硫实验。在实验中，使用了CaO含量在0至20 pct范围内的四种不同的氟渣。建立了基于两层膜理论的EMM废钢脱硫的数学模型。它充分描述了拒绝的EMM废料脱硫反应的热力学和动力学。特别是，它捕获了熔渣和熔融锰之间界面张力对硫转移过程的影响。对测量结果和计算结果的比较分析证明了该模型的可行性：它考虑了保温温度，炉渣CaO含量，废EMM废料中初始硫含量的影响，炉渣/锰质量比对脱硫效率的影响。结果表明，CaO可以促进锰金属的脱硫。硫去除率是58.01 pct，在1673 K（1400°C）下无CaO渣，而如果CaO含量增加到20 pct，则硫去除率将提高到84.58 pct。在较高温度下，炉渣中的CaO含量可以适当降低。发现高的炉渣/锰质量比有利于脱硫，而炉渣中的CaO含量可根据废EMM废料中的初始硫含量进行调整。如果CaO含量增加到20 pct，则为58 pct。在较高温度下，炉渣中的CaO含量可以适当降低。发现高的炉渣/锰质量比有利于脱硫，而炉渣中的CaO含量可根据废EMM废料中的初始硫含量进行调整。如果CaO含量增加到20 pct，则为58 pct。在较高温度下，炉渣中的CaO含量可以适当降低。发现高的炉渣/锰质量比有利于脱硫，而炉渣中的CaO含量可根据废EMM废料中的初始硫含量进行调整。