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

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概要

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• The equilibrium in the reduction of solid cobaltous sulphide by hydrogen gas were investigated with the aid of the flow method. The effect of temperature upon the equilibrium constant and the standard free energy change for the reaction over the temperature range 631~775℃ were determined as follows : CoS(s)+H_2=Co(s)+H_2S ; log K_p=-3, 516/T+1.323, 〓F°=16, 082-6.051T. By combining these equations with the known ones of hydrogen sulphide gas, the dissociation pressure and the standard free energy change in the dissociation of solid cobaltous sulphide were represented as a function of temperature by the following equations : 2CoS(s)=2Co(s)+S_2 ; log P_<S_2>=- 16.418/T+7.746, 〓F°=75, 100-35.43T. Using these results and other thermodynamical data, the heat change and the standard free energy change of formation of solid cobaltous sulphide were computed. Co+S(r)=CoS ; 〓H298.1=-22, 770, 〓F°298.1=-22, 960.

• 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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• 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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