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Simulation of oxygen penetration and decarburisation in EAF using supersonic injection system

机译：使用超音速喷射系统模拟电炉中的氧气渗透和脱碳

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The supersonic jet generated by a Laval nozzle in air or in steel has been modelled to vary degrees of complexity and with different goals.(1,2))This paper describes the application of our model to an injection system based on fixed lances, placed in the furnace walls without the help of CFD simulation, which is certainly very precise, but very time consuming and useless for an on line control.The approach followed here is energy-based and it allows estimating the depth reached by the O-2 during its penetration within the slag and steel. It can be used for an on line control and for the whole description of the injection process. The calculation of a theoretical interface surface allows investigating the chemical process and the mass transport phenomena induced by the injection itself.This simulation can be used to investigate the required injection parameters to ensure the maximum mass exchange with the bath and to foresee new injection technologies performances.Moreover, this model of the supersonic injection allows the construction of a decarburisation model that can evaluate the effects and the efficiency of the injection technology.This article describes the jet-penetration model and the decarburisation model.The validation of the model has been performed by the comparison with the experimental data of the Tenaris-Dalmine EAF and the KT Supersonic Injection System (the chemical package of Techint Technologies for the multi-point injection of oxygen, carbon and other fines into the EAF).
机译：由Laval喷嘴在空气或钢中产生的超音速射流已建模以改变复杂程度并具有不同目标。（1,2））本文描述了该模型在基于固定喷枪的喷射系统中的应用无需CFD模拟就可以在炉壁上进行测量，这当然非常精确，但是非常耗时并且对在线控制没有用。这里采用的方法是基于能量的，并且可以估算O-2在燃烧过程中达到的深度它在炉渣和钢中的渗透。它可以用于在线控制和整个注射过程描述。理论界面的计算可以研究注入过程本身引起的化学过程和传质现象，该模拟可用于研究所需的注入参数，以确保与熔池的最大质量交换并预测新的注入技术性能此外，该超音速喷射模型允许构建脱碳模型，该模型可以评估喷射技术的效果和效率。本文介绍了射流渗透模型和脱碳模型，并对该模型进行了验证通过与Tenaris-Dalmine电炉和KT超音速喷射系统（Techint Technologies的化学包装，用于向电炉多点注入氧气，碳和其他细粉）的实验数据进行比较。

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