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An Extended Model For Slag Eye Size In Ladle Metallurgy

机译：钢包冶金渣眼尺寸的扩展模型

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摘要

The slag eye is the term for the region where slag is pushed to the periphery of a steel ladle by the action of inert gas bubbling. The formation of the eye has been the subject of some investigations in the recent past. In modern ladle metallurgy practice, the eye and its central spout portion raised above the bath level are some of the few regions where molten steel is directly exposed to the ambient environment. These are sites for reactions like Oxygen and Nitrogen pick up. Furthermore, the slag metal interface at the periphery of the eye region may break up into slag droplets, often referred to as 'slag emulsification'. Such droplet generation may increase the interfacial area for slag-metal reactions, but also may result in undesirable effects like slag entrainment. Thus, the overall influence of eye formation on the end quality of steels is important.rnReliable predictive models for the eye size could form an integral component of any control strategy for on-line process control. Such models of the eye sizes may also be useful for process design considerations. With this aim, a previous mechanistic model of slag eye formation is extended in a new mathematical model to quantify the eye size directly from the plant operating variables. The technique of dimensional analysis as well as analysis of published eye size data from several liquid-liquid systems have been employed in the derivation of the model.
机译：渣眼是指通过惰性气体鼓泡作用将炉渣推到钢包周围的区域的术语。眼睛的形成已成为最近一些研究的主题。在现代钢包冶金实践中，在钢水直接暴露于周围环境的少数几个区域中，有一部分是钢眼和其中心喷口高出熔池水平面。这些是氧气和氮气吸收等反应的场所。此外，在眼部区域的外围的炉渣金属界面可能分解成炉渣液滴，通常被称为“炉渣乳化”。这种液滴的产生可能会增加渣金属反应的界面面积，但也会导致不希望的影响，例如夹渣。因此，孔眼的形成对钢材最终质量的总体影响很重要。对于孔眼尺寸的可靠预测模型可以构成任何在线过程控制控制策略的组成部分。这种眼睛尺寸模型对于过程设计考虑也可能有用。为此，在新的数学模型中扩展了炉渣眼形成的先前的机械模型，以直接从工厂操作变量中量化炉眼尺寸。在模型的推导中，已使用了尺寸分析技术以及对来自几种液-液系统的已发布眼图数据的分析。

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