Study on the behavior of magnesium in molten salt electrolysis in-situ desulfurization during hot metal pretreatment

Abstract

A desulfurization method based molten salt electrochemistry using magnesite-based desulfurizer for hot metal pretreatment was investigated. The feasibility of desulphurization of hot metal by magnesium produced from magnesitebased desulfurizer through high temperature molten salt electrolysis was studied with one scheme of the desulfurizing agent constitutions. Through theoretical analysis, the conditions of the two different desulfurization processes, and the theoretical values of the critical current density at which mutual transition between the two desulfurization processes were specified. For the two different desulfurization processes, a kinetic model for desulfurization of hot metal by using magnesite-based desulfurizer through high temperature molten salt electrolysis was established. Through kinetic modeling, the behavior of magnesium and its main role on desulfurization were investigated.

Keywords

• hot metal pretreatment
• in-situ desulfurization
• magnesium-based desulfurizer
• molten
• salt electrochemistry
• current density – temperature