KINETICS OF INTERFACIAL TRANSITION OF SULFUR DURING LADLE REFINING OF IRON BY MAGNESIUM
https://doi.org/10.17073/0368-0797-2016-12-896-902
Abstract
During magnesium desulfurization of molten iron, high – sulfur and heterogeneous slag with high content of prills is formed in the ladle. Generally these slags are sour with various oxidizing ability. The high content of sulfur in the slag increases the “danger” of the reversion of sulfur from the slag to the melt. In this paper the kinetics of sulfur transfer through the metal – slag interface surface was examined.
The results of hot metal treatment with magnesium in the factories in China were used as a basis for experimental data. The interfacial transfer of sulfur was modeled using diffusion boundary layer theory.
The coefficient values of sulfur mass transfer in the slag were determined using a simplified expression of the second Fick’s law. While using these kinetic characteristics during calculations, it was proved that after refining of hot metal with magnesium under present conditions, a fast return of the sulfur from the slag into the metal droplets takes place. At the same time the estimated sulfur content in the iron in the ladle remains practically invariable.
About the Author
A. L. Rudenko
Z.I. Nekrasov Institute of Ferrous Metallurgy, Ukrainian National Academy
Ukraine
Cand. Sci. (Eng.), Senior Researcher
Ukraine
Cand. Sci. (Eng.), Senior Researcher
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Review
For citations:
Rudenko A.L. KINETICS OF INTERFACIAL TRANSITION OF SULFUR DURING LADLE REFINING OF IRON BY MAGNESIUM. Izvestiya. Ferrous Metallurgy. 2016;59(12):896-902. (In Russ.) https://doi.org/10.17073/0368-0797-2016-12-896-902
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