ISSN 2594-5327
49º Congresso anual — Vol. 49, Num. 1 (1994)
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Resumo
In order to estimate the distribution ratios of phosphorus (P) and silicon (Si) between sodium carbonate-based slag and molten copper, the thermodynamic properties of slags containing these impurity oxides at 1423 K to 1523 K were studied by the following measurements: Solubility of Na₃PO₄(s) in Na₂CO₃ melt Electrochemical measurements of Na₂O activities in Na₂O–CO₃–XOᵥ slags (where X = P or Si, and V = valence of X) under various CO₂ partial pressures Solubility measurements of CO₂ in the slags Based on the results, the equilibrium distribution ratios of P and Si between the slags and molten copper were estimated as a function of CO₂ and oxygen partial pressures and slag composition. The effectiveness of using sodium carbonate slag for the removal of these impurity elements from molten copper is discussed.
Palavras-chave
Molten copper, Sodium carbonate slag, Phosphorus removal, Silicon removal, Thermodynamics, Distribution ratio, Slag refining, CO₂ solubility
Como citar
R., Alvear, Gerardo; Hiroyuki, Fukuyama,; Toshiharu, Fujisawa,; Chikabumi, Yamauchi,.
Thermodynamic Considerations for Elimination of P and Si from Molten Copper by Using Na₂CO₃ Slag,
p. 2003-2012.
In: 49º Congresso anual,
Rio de Janeiro, Brasil,
1994.
ISSN: 2594-5327, DOI 10.5151/2594-5327-49v4-415-424
