Copper and Silver Capacity of Sodium Sulfide Flux

Abstract

The copper distribution ratio between the Na₂S flux and silver, L_Cu(flux-Ag) (= [mass% Cu]_{(in flux)} / [mass% Cu]_{(in Ag)}), was measured at 1473 K, and the absorption of copper and silver in Na₂S flux has been quantified. The possibility of the sulfurizative removal of copper in iron through silver phase into Na₂S flux is examined. By combining the L_Cu(flux-Ag) value with the distribution ratio of copper between the silver and the carbon-saturated iron, L_Cu(Ag-Fe), the distribution ratio of copper between the Na₂S flux and carbon-saturated iron, L_Cu(flux-Fe), is derived to be 330 at 1473 K. Therefore, it is expected that the copper in iron can be removed effectively by the sulfurizative removal of copper in iron through silver phase. The copper distribution ratio between the Na₂S flux and silver, L_Cu(flux-Ag) (= [mass% Cu]_{(in flux)} / [mass% Cu]_{(in Ag)}), was measured at 1473 K, and the absorption of copper and silver in Na₂S flux has been quantified. The possibility of the sulfurizative removal of copper in iron through silver phase into Na₂S flux is examined. By combining the L_Cu(flux-Ag) value with the distribution ratio of copper between the silver and the carbon-saturated iron, L_Cu(Ag-Fe), the distribution ratio of copper between the Na₂S flux and carbon-saturated iron, L_Cu(flux-Fe), is derived to be 330 at 1473 K. Therefore, it is expected that the copper in iron can be removed effectively by the sulfurizative removal of copper in iron through silver phase.