Fundamental Researches on Smelting of Sulphide Ores. VI : On the Equilibrium in the Reduction of Solid Cuprous Sulphide by Hydrogen Gas

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概要

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• The equilibrium in the reduction of solid cuprous sulphide by hydrogen gas was studied by means of the dynamical method over the temperature range 727〜872℃. The equations for the temperature dependence of the equilibrium constant and the standard free energy change in the reaction were obtained as follows : Cu_2S(β)+H_2=2Cu+H_2S ; log K_p=-2, 140/T-0.962, 〓F°=9, 788+4.400T. By combining the equations with the known ones of hydrogen sulphide gas, the dissociation pressure and the standard free energy change in the dissociation reaction of solid cuprous sulphide were represented as a function of temperature by the following equations : 2Cu_2S(β)=4Cu(s)+S_2 ; log P_<S_2>=-13, 666/T+3.176, 〓F°=62, 510-14.527T. Using these results and other thermodynamical data, the heat change and the standard free energy change of formation of solid cuprous sulphide were calculated. 2Cu+S(r)=Cu_2S(α); 〓H298.1=-19, 940, 〓F°298.1=-21, 290.

• 東北大学の論文

著者

• SUDO Kingo

  The Research Institute of Mineral Dressing and Metallurgy

関連論文

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• Fundamental Studies on Uranium Oxides. I : Equilibria among UO_2, U_4O_9 and U_3O_8 at 360〜580℃
• Studies on Treatment of Uranium Ores. I : Leaching of Uranium Ore from the Matsuiwa Mine
• Studies on Treatment of Uranium Ores. II : Recovery of Uranium from Leach Liquors of a Uranium Ore from the Matsuiwa Mine
• Fundamental Studies on Uranium Oxides. II : Equilibria among UO_2, U_4O_9 and U_3O_8 at 500〜1, 200℃
• On the Dissociation Pressure of Pyrite
• Fundamental Researches on Smelting of Sulphide Ores. IV : On the Equilibrium in the Reduction of Solid Lead Sulphide by Hydrogen Gas
• Fundamental Researches on Smelting of Sulphide Ores. IX : On the Equilibrium in the Reduction of Sulphur in Molten Tin by Hydrogen Gas
• Fundamental Researches on Smelting of Sulphide Ores. VIII : On the Equilibrium in the Reduction of Solid Stannous Sulphide by Hydrogen Gas
• Fundamental Researches on Smelting of Sulphide Ores. VI : On the Equilibrium in the Reduction of Solid Cuprous Sulphide by Hydrogen Gas
• Fundamental Researches on Smelting of Sulphide Ores. X : On the Equilibrium in the Reduction of Sulphur in Molten Lead by Hydrogen Gas
• Fundamental Researches on Smelting of Sulphide Ores. V : On the Equilibrium in the Reduction of Solid Cobaltous Sulphide by Hydrogen Gas
• Fundamental Researches on Smelting of Sulphide Ores. VII : On the Equilibrium in the Reduction of Copper Sulphide in Molten Copper by Hydrogen Gas
• Fundamental Researches on Smelting of Sulphide Ores. III : On the Equilibrium in the Reduction of Solid Silver Sulphide by Hydrogen Gas
• Fundamental Researches on Smelting of Sulphide Ores. II : On the Equilibrium in the Reduction of Solid Ferrous Sulphide by Hydrogen Gas
• Fundamental Researches on Smelting of Sulphide Ores. XIV : On Molten Copper Sulphide

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