Sulfur Removal from Molten Copper by Sodium Carbonate Slag

Gerardo R. F. ALVEAR F.; Ichiro MUTO; Mohammad S. BAFGHI; Toshiharu FUJISAWA; Chikabumi YAMAUCHI

doi:10.2473/shigentosozai.114.726

Gerardo R. F. ALVEAR F., Ichiro MUTO, Mohammad S. BAFGHI, Toshiharu FUJISAWA, Chikabumi YAMAUCHI

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Keywords: Thermodynamics, Activity, Distribution Ratio, Sodium Carbonate Slag, Copper, Sulfur Removal, NaO0．5 - CO2 - SO3 System

JOURNAL FREE ACCESS

1998 Volume 114 Issue 10 Pages 726-732

DOI https://doi.org/10.2473/shigentosozai.114.726

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Abstract

Thermodynamic properties of NaO0.5 - CO2 - SOν/2 slag (ν: valence of S) have been investigated by conducting the following experiments: (1) Redox equilibrium experiments to determine the sulfur valence in the slag. (2) Solubility measurements of CO2 in the slags. (3) Activity measurements of NaO0.5 under various partial pressures of CO2 . (4) Distribution equilibrium measurements of S between the slag and molten copper. Based on the results, the equilibrium distribution ratio of S between the slag and molten copper have been estimated as a function partial pressures of CO2 and of oxygen and the slag composition at 1523 K.

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