The rate of antimony elimination from molten copper by the use of Na2CO3 slag

The rate of Sb elimination from molten copper by the use of Na2CO3 slag was measured at 1523 K. The results obtained under the present experimental conditions show that Sb in molten copper is eliminated in a tri-valent or a penta-valent form, depending on the oxygen concentration at the slag-metal i...

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Bibliographic Details
Published in:Metallurgical and materials transactions. B, Process metallurgy and materials processing science Process metallurgy and materials processing science, 2003-12, Vol.34 (6), p.869-879
Main Authors: TANAHASHI, Mitsuru, ZHIJIAN SU, TAKEDA, Kunihiko, SOHN, Hong Yong, YAMAUCHI, Chikabumi
Format: Article
Language:English
Subjects:
Applied sciences
Exact sciences and technology
Metallurgical fundamentals
Metals. Metallurgy
Production of metals
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Summary:The rate of Sb elimination from molten copper by the use of Na2CO3 slag was measured at 1523 K. The results obtained under the present experimental conditions show that Sb in molten copper is eliminated in a tri-valent or a penta-valent form, depending on the oxygen concentration at the slag-metal interface, and its elimination rate increases with increasing initial oxygen concentration in molten copper. The overall elimination rate of Sb is affected by the stirring condition of the molten copper, which indicates a rate control by mass transfer in that phase. The mass-transfer coefficients of Sb and oxygen in molten copper at 1523 K without external stirring were determined, based on the mass balances of Sb and oxygen in the molten copper and slag phases and the equilibrium relation of the Sb elimination reaction at the slag-metal interface.
ISSN:1073-5615
1543-1916
DOI:10.1007/s11663-003-0093-y