J. Mater. Sci. Technol. ›› 1991, Vol. 7 ›› Issue (1): 25-28.

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Reduction Kinetics of Nickel Sulphide

By LIU Zhonghua LIU Chunpeng Department of Metallurgy,Kunming Institute of Technology,Kunming,650093,China.To whom correspondence should be addressed.   

  1. DepartmentofMetallurgy,KunmingInstituteofTechnology,Kunming,650093,China.Towhomcorrespondenceshouldbeaddressed.;DepartmentofMetallurgy,KunmingInstituteofTechnology,Kunming,650093,China.
  • 收稿日期:1991-01-28 修回日期:1991-01-28 出版日期:1991-01-28 发布日期:2009-10-10

Reduction Kinetics of Nickel Sulphide

By LIU Zhonghua LIU Chunpeng Department of Metallurgy,Kunming Institute of Technology,Kunming,650093,China.To whom correspondence should be addressed.   

  • Received:1991-01-28 Revised:1991-01-28 Online:1991-01-28 Published:2009-10-10

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摘要： <正> Reduction kinetics of Ni_3S_2 was experimen-tally studied by following the time required forcompletion of the hydrogen reduction reaction inthe presence of calcium oxide.A simple empiricalintegration equation,derived for describing the ef-fect of CaO/S molar ratio,temperature,hydrogenconcentration and the average diameter ofNi_3S_2 grains,may be shown as following:t_(X=1)=2.317×10~(-6)d_(Ni_3S_2) C_(H_2)~(-1)β~(-2.29)e~(13710/T),minThe reduction reaction is of first order with respectto hydrogen concentration,and the apparent reac-tion activation energy is 114.0 kJ/mol.A great ma-jority of metallic Ni reduced from Ni_3S_2 is distrib-uted in the products evenly.

Abstract: Reduction kinetics of Ni_3S_2 was experimen-tally studied by following the time required forcompletion of the hydrogen reduction reaction inthe presence of calcium oxide.A simple empiricalintegration equation,derived for describing the ef-fect of CaO/S molar ratio,temperature,hydrogenconcentration and the average diameter ofNi_3S_2 grains,may be shown as following:t_(X=1)=2.317×10~(-6)d_(Ni_3S_2) C_(H_2)~(-1)β~(-2.29)e~(13710/T),minThe reduction reaction is of first order with respectto hydrogen concentration,and the apparent reac-tion activation energy is 114.0 kJ/mol.A great ma-jority of metallic Ni reduced from Ni_3S_2 is distrib-uted in the products evenly.

Key words: kinetics, nickel sulphide, reduction