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PHASE DIAGRAMS OF KF-LiCI-BaCl_2 AND LiF-LiCI-BaCl_2 SYSTEMS

YAN Licheng YANG Jinxiu ZHU Lei , XU Jingyan Shanghai University of Science andTechnology , Shanghai , ChinaFAN Jinxia Suzhou Teachers′ School , Suzhou , China YAN Licheng , Associate Professor , Dept.of Chemistry , Shanghai University of Science and Technology , Shanghai 201800 , China

金属学报(英文版)

The phase diagrams of molten salt systems KF-LiCI-BaCl_2 and LiCI-LiF-BaCl_2 have been determined by visual polythermal method.The relationship between the change of cation radius of monovalent fluoride and the areas of primary crystal region in the phase diagrams is discussed.

关键词: phase diagram , null , null , null , null

COMPUTERIZED SIMULATION OF MOLTEN SALT SOLUTION OF Li,KF,Cl SYSTEM BY MOLECULAR DYNAMIC METHOD

SHAO Jun Shanghai University of Science and Technology , Shanghai , ChinaXU Hua CHEN Nianyi Shanghai Institute of Metallurgy , Academia Sinica , Shanghai , China SHAO Jun Associate Professor , Dept.of Chemistry , Shanghai University of Science and Technology , Shanghai 201800 , China

金属学报(英文版)

The structure and properties of molten salt solution o J Li,KF,Cl system have been investigedby computerized simulation of molecular dynamic method.The partial RDF,the partial molarenergy of mixing and the diffusion coeffients of Li~+,K~+,F~- and Cl~- have been calculated.The results are in agreement with the experimental values.The regularities of the distributionof ions and mieroscopic holes are discussed based on the results of computerized simulation.

关键词: alkali halide , null , null , null

ANODIC PROCESSES FOR ELECTROWINNING OF Sb FROM JAMESONITE CONCENTRATE

ZHAO Ruirong JIANG Hanying QIN Yihong ZENG Zhenou YANG Jiyue Central South University of Technology , Changsha , China ZHAO Ruirong , Associate Professor , Dept.of Chemistry , Central South University of Technology , Changsha 410083 , China

金属学报(英文版)

The anode reaction and current density of the electrowinning of Sb from jamesonite concen- trate have been investigate.High anodic current density seems to be the major reason for high energy consumption,air pollution by alkaline mists in workshop as well as poor quality of deposition.A series of steps,such as absorption,phase formation,ageing of passivated films etc.,were found to be involved during the anodic passivating process of Fe in NaOH solution. A new anodic material Fe/Ni/Co_3O_4 was developed so as to save the d.c.electric energy over 160 kWh/t of Sb.

关键词: Sb , null , null , null

A NEW MOLYBDENUM OXIDE PHASE

FANG Zheng ZHANG Pingmin CHEN Xinmin Central-South University of Technology , Changsha , China FANG Zheng , Associate Professor , Dept.of Chemistry , Central South University of Technology , Changsha 410083 , China

金属学报(英文版)

A new molybdenum oxide phase which exists in bomb combustion products of Mo was found. It has been determined that this phase is a transformed MoO_3 of triclinic system.One set of its lattice parameters was also determined from the X-ray diffraction data as α=0.4049± 0.0001 nm,b=0.5079±0.0003 nm,c=1.4339±0.0009 nm,α=115.16±0.08°,β=90.69± 0.14°,γ=105.58±0.05° and unit cell volume=0.2544 nm~3.

关键词: Mo oxide , null , null

BEHAVIORS OF Sb,Sn AND As IN LEACHING AND ELECTROWINNING FROM JAMESONITE CONCENTRATE

ZHAO Ruirong JIANG Hanying ZENG Zhen'ou QIN Yihong XU Shun Central South University of Technology , Changsha , China ZHAO Ruirong Associate Professor , Dept.of Chemistry , Central South University of Technology , Changsha 410083 , China

金属学报(英文版)

The separating efficiency of Sb from As and Sn in jamesonite concentrate could be improved by changing the composition of leaching solution and other conditions.The related kinetic parameters of electrode reaction were evaluated under discussion on the form of complex ion AsS_3~(3-)in extract and the reduction at amalgam electrode.It was also discussed about the ef- fect of eoncentration of Na_2S and SbS_3~(3-)in solution on the current efficiency of SnS_4~(4-) reduction.

关键词: Sb , null , null , null , null

INTERACTION BETWEEN Cu AND LIQUID Sn—Also on Physical Meaning of Wetting Curve

ZHANG Qiyun HAN Wanshu LIU Junkang Peking University , Beijing , China ZHANG Qiyun Professor , Dept.of Chemistry , Peking University , Beijing 100871 , China

金属学报(英文版)

The interaction between Cu and liquid Sn was studied by microstructure observation.The curve of the dipping time with related to dissolving and diffusion of Cu in liquid Sn is given. The Cu dissolves rapidly in liquid Sn at the beginning,then an intermetallic compound Cu_6Sn_5 forms,and the dissolving follows to slow down.At temperature up to 350℃,the hard feather-like Cu_6Sn_5 is sharply growing up and speads through the dipped Sn laver.The way to inhibit the growth of the intermetallic compound Cu_6Sn_5 was also approached.Thus,on the above mentioned basis,the physical meaning of the wetting curve traced by the meniscograph wettability tester has been derived as film detaching,Cu dissolying and Cu_6Sn_5 growing.

关键词: Cu , null , null , null , null

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