Improving the Desulphurization in COREX-3000 Process by the Optimization of Chemical Compositions of Slag

Abstract

To improve the desulfurization in the COREX-3000 process, several aspects are studied and practiced. The work documented in the present paper focuses on the effects of chemical compositions of slag, such as CaO/SiO 2 , MgO, MgO/Al 2 O 3 and MnO, on desulfurization. Theoretical calculations of sulfide capacity and viscosity of slag and diffusion coefficient of S 2 − in the slag are given to study the effects of slag chemical compositions on the thermodynamics and dynamics of desulfurization. After that, experiments are carried out to verify the theoretical analyses and give the appropriate ranges of these four parameters. The suggested suitable ranges of CaO/SiO 2 , MgO content, MgO/Al 2 O 3 and MnO content for COREX-3000 are 1.20-1.30, 10 wt%-12 wt%, 0.80-0.90 and 0.4 wt%-0.7 wt%, respectively.

Utilization Rate of Magnesium in Hot Metal Desulfurization by Magnesium Vapor Injection

“…In recent years, some studies on desulfurization in refining process has made a good performance on the desulfurization efficiency. [12][13][14][15] But the problem of desulfurization by magnesium injection has not been solved. Therefore, improving the utilization rate of magnesium and developing new desulfurization technology with high efficiency are still the key and difficult points in the research of the desulfurization technology of hot metal with magnesium injection.…”