Steel inclusion prediction in ladle treatment

建议开发和验证一个动力学模型夹杂物转变（铝酸镁尖晶石和铝酸钙）在钢的关键钢包精炼阶段的生产。 这项工作建立在以前的工作中，在钢包中的金属和炉渣成分的动力学模型的开发和验证的生产规模钢包冶金处理站。 该数学模型是基于传输控制扩散的Al，Mg，O，S和Ca在钢中，并假设在夹杂物-金属界面的平衡。 在界面处的平衡计算与细胞模型改编自以前使用的炉渣热化学计算。 将在安赛乐米塔尔的钢包冶金设施中进行生产试验形式的合作实验。 将对钢中的金属、炉渣和夹杂物进行取样，以验证模型。 将使用电子显微镜将组成与计算结果进行比较。 钢包冶炼是控制钢水和夹杂物化学成分的最后一次机会，对生产高质量的钢至关重要。 目前，还没有模型来预测整个钢包冶金加热过程中炉渣、金属和夹杂物化学发展的动力学。 预计这将立即用于加拿大钢铁生产商生产高质量的钢铁，在全球范围内竞争。

It is proposed to develop and validate a kinetic model for inclusion transformation (both magnesium aluminate spinels and calcium aluminates) in steels during the critical ladle refining stage of production. This work builds on previous work in which a kinetic model for metal and slag composition in steel ladles was developed and verified for a production scale steel ladle metallurgy treatment station. The mathematical model is based on transport-controlled diffusion of Al, Mg, O, S, and Ca in the steel and assumes equilibrium at the inclusion-metal interface. Equilibrium at the interface is calculated with a cell model adapted from previously used slag thermochemical calculations. Collaborative experiments in the form of production trials will be conducted in the ladle metallurgy facilities of ArcelorMittal. Samples of metal, slag and inclusions in the steel will be taken for validation of the model. Electron microscopy will be used to compare the compositions with the calculations. Ladle metallurgy is the last opportunity to control the steel and inclusion chemistry before casting, so it is vital to the production of high quality steel. Currently, there are no models that predict the kinetics of slag, metal and inclusion chemistry development throughout a ladle metallurgy heat. This is expected to be of immediate use to Canadian steel producers to produce high-quality steel that competes on a global basis.