Development of a new parameter for predicting hot metal desulfurization efficiency

Abstract Over the last decades, the capability of a desulfurizing mixture to remove sulfur has been widely studied. The hot metal desulfurization efficiency represents the percentage of sulfur removed from the bath and the development of parameters that predict the process efficiency is fundamental...

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Bibliographic Details
Published in:	REM - International Engineering Journal Vol. 74; no. 4; pp. 443 - 450
Main Authors:	Santo, Elton Volkers do Espírito, Oliveira, Sábata Marla Reis Durães, Silva, Caio Vaccari, Grillo, Felipe Fardin, Oliveira, José Roberto de
Format:	Journal Article
Language:	English
Published:	Fundação Gorceix 01-12-2021
Subjects:	desulfurization desulfurization factor ENGINEERING, MECHANICAL GEOLOGY hot metal MECHANICS METALLURGY & METALLURGICAL ENGINEERING solid and liquid phases hot metal desulfurization solid and liquid phases desulfurization factor
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Summary:	Abstract Over the last decades, the capability of a desulfurizing mixture to remove sulfur has been widely studied. The hot metal desulfurization efficiency represents the percentage of sulfur removed from the bath and the development of parameters that predict the process efficiency is fundamental for selecting the best desulfurization mixture without the need for experimental tests. Therefore, this research aims to develop a new parameter to predict the hot metal desulfurization mixture efficiency, which was called the desulfurization factor (FDeS). Desulfurizing mixtures from CaO-Fluorspar and CaO-Sodalite systems were used for this purpose. The phases present in the heating of the mixtures at 1400°C as well as the liquid and solid percentage were determined by ThelmoCalc software. These data were used in the desulfurization factor construction. Experiments were carried out in an electric resistance furnace with mechanical stirring. Different mixtures from these systems were added in molten hot metal at 1400°C. Sampling was made to measure the sulfur content variation with time. It was possible to apply the desulfurization factor to the proposed mixtures and to determine the influence of the solid and liquid phases on the desulfurization efficiency.
ISSN:	2448-167X 2448-167X
DOI:	10.1590/0370-44672021740001