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首页> 外文会议>Sohn International Symposium on Advanced Processing of Metals and Materials vol.1; 20060827-31; San Diego,CA(US) >EFFECTS OF MASS TRANSFER IN EVAPORATION PROCESSES OF ALLOY COMPONENTS IN VACUUM PROCESSES
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EFFECTS OF MASS TRANSFER IN EVAPORATION PROCESSES OF ALLOY COMPONENTS IN VACUUM PROCESSES

机译：质量传递在真空过程中合金成分蒸发过程中的作用

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摘要

Since several years aog there is noted an increasing importance of the metallurgical vacuum technologies. This refers mainly to the extra furnace steel treatment processes, melting of steel and special alloys in the induction and arc vacuum furnaces, as well as refining processes of nonferrous metals. In the presented work, there is discussed a phenomenon of evaporation of volatile components of metal bath under reduced pressure with description of kinetics of this process. In this article are presented are the evaluation of the mass transfer coefficients in the melt and gaseous phase. Based on results of our own research on removal rate of impurities from liquid copper (bismuth, lead) in vacuum refining process, it is determined the thickness of hypothetical boundary layer in the gas phase. This allowed to formulate a general kinetic equation defining the evaporation rate of gaseous components from metal bath. The values of mass transfer coefficients determined from this equation were compared with experimental results by other authors working on the evaporation effect of melt components of metal alloys.
机译：自几年以来，人们注意到冶金真空技术的重要性日益提高。这主要是指额外的炉钢处理工艺，感应炉和电弧真空炉中钢和特殊合金的熔化以及有色金属的精炼工艺。在提出的工作中，讨论了在减压下金属浴中挥发性成分蒸发的现象，并对该过程的动力学进行了描述。本文介绍了熔体和气相中传质系数的评估。根据我们自己对真空精炼过程中液态铜（铋，铅）中杂质去除率的研究结果，确定了气相中假设边界层的厚度。这样就可以制定一个通用的动力学方程式，来定义金属浴中气态成分的蒸发速率。将由该方程式确定的传质系数值与其他研究金属合金熔体成分蒸发作用的实验结果进行了比较。

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