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Spectroscopic Features and Formation Conditions of Sphalerite in the Lead-Zinc Deposit, Guangdong,china

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Acta Geologica Sinica(English Edition) 1989年第4期63卷 361-372页

作者： Li Di’en~x② and Peng Mingsheng central-south university of Technology, {3., Hunan 2Li Di 'en: Male born in 1962 graduated in 1985 as Msc from the Department of Geology Central-South University of Technology and now a lecturer of the same department engaged in mineralogical teaching and research Address: Dept. of Geology Central-South University of Technology Changsha Hunan China. central-south university of Technology Changsha Hunan

Electron paramagnetic resonance spectra, absorption spectra, cathodoluminescence spectra and infrared spectra of sphalerite from the Lechang remoulded sedimentary lead-zinc deposit have been studied so as to provide microscopic evidence for the formation conditions and mineralization stages of the deposit as well as the geochemical processes of mineralization. On the basis of thermodynamic calculations, the stable fields of sphalerite from different mineralization stages were determined and are shown in logfs_2-logfo_2 diagrams; furthermore. the physico-chemical conditions of mineralization and the properties of mineralization solutions are discussed so that reliability of the genetic information provided by the spectroscopy of sphalerite may also be verified. It is suggested that the temperature and pH value of the mineralization system decrease, and so do the fugacities of O_2, S_2, H_2. and H_2S and the activities of HS^- and SO_4^(2-) from the early to late stages of minerahzation.

关键词： Pro Spectroscopic Features and Formation Conditions of Sphalerite in the Lead-Zinc Deposit Guangdong,china

Expanded Industrial Experiments of Free-alkali Recovery from Sodium Tungstate Solution by the Membrane Electrolysis Process

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Rare Metals 2001年第2期20卷 121-125页

作者： Liansheng Xiao, Qixiu Zhang, Guiqing Zhang, Bofan Gong (Metallurgical Separation Science and Engineering Lab, central south university, changsha 410083. china) Cent S Univ Met Separat Sci & Engn Lab Changsha 410083 Peoples R China

The expanded industrial experiments were conducted with practical industrial liquor to separate free alkali from sodium tungstate solution by electrolysis with cation-exchange membrane. Experimental results show that on the condition that the temperature is 50-55 degreesC and the current density is 1000 A/m(2), the single electrolysis cell is operated stably and 80% free-alkali in mass fraction is separated from the anode feed liquor of sodium tungstate, with electric efficiency up to more than 88% and the unit energy consumption E lower than 1900 kWh/t; while three electrolysis cells in series are operated, under the condition that the temperature is 60-65 degreesC and the current density is 1000 A/m(2), the electric efficiency can reach higher than 88% and the unit energy consumption E can be lower than 2250 kWh/t.

关键词： sodium tungstate membrane electrolysis

REDUCTIVE　LEACHING　OF　MANGANESE　NODULE　BY　CHALCOPYRITE　INDILUTE　HCL　SOLUTION

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中国有色金属学会会刊：英文版 1995年第1期5卷 53-56页

作者： Guo Xueyi(Department of Nonferrous Metallurgy ,central south university of Technolegy, changsha 410083. CENT S UNIV TECHNOL DEPT NONFERROUS METCHANGSHA 410083PEOPLES R CHINA

ＲＥＤＵＣＴＩＶＥＬＥＡＣＨＩＮＧＯＦＭＡＮＧＡＮＥＳＥＮＯＤＵＬＥＢＹＣＨＡＬＣＯＰＹＲＩＴＥＩＮＤＩＬＵＴＥＨＣＬＳＯＬＵＴＩＯＮＧｕｏ；Ｘｕｅｙｉ（ＤｅｐａｒｔｍｅｎｔｏｆＮｏｎｆｅｒｒｏｕｓＭｅｔａｌｌｕｒｇ... 详细信息

ＲＥＤＵＣＴＩＶＥＬＥＡＣＨＩＮＧＯＦＭＡＮＧＡＮＥＳＥＮＯＤＵＬＥＢＹＣＨＡＬＣＯＰＹＲＩＴＥＩＮＤＩＬＵＴＥＨＣＬＳＯＬＵＴＩＯＮＧｕｏ；Ｘｕｅｙｉ（ＤｅｐａｒｔｍｅｎｔｏｆＮｏｎｆｅｒｒｏｕｓＭｅｔａｌｌｕｒｇｙ，ＣｅｎｔｒａｌＳｏｕｔｈＵｎｉ...

关键词： manganese nodule chalcopyrite leaching

Thermodynamic Calculation of the SrO-Nb_2O_5 System

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Journal of Materials Science & Technology 1999年第3期15卷 203-207页

作者： Ying YANG Hao YU and Zhanpeng JIN(Department of Materials Science and Engineering, central south university of Technology, changsha 410083. china) Cent S Univ Technol Dept Mat Sci & Engn Changsha 410083 Peoples R China

The SrO-Nb2O5 quasibinary system is assessed using the Calculation of Phase Diagram (CAL PHAD) technique. A set of self-consistent parameters is obtained and the calculated phase diagram is consistent with the experim... 详细信息

关键词： SrO Thermodynamic Calculation of the SrO-Nb2O5 System

STUDY ON DENSIFICATION OF CHEMICAL MANGANESE DIOXIDE FOR BATTERIES

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Journal of central south university 1998年第2期10卷 20-22页

作者： Wang Chenggang Zhao Qinsheng (Department of Nonferrous Metallurgy, central south university of Technology,changsha 410083. china) Department of Nonferrous Metallurgy Central South University of Technology Changsha 410083 China

A new densification method of chemical manganese dioxide(CMD) NaMnO 4 densification has been developed. This MnO 2 produced by NaMnO 4 oxidation possessed γ type structure. After the crude MnO 2 was densified, the tap density of the MnO 2 powder could be increased from 1.2 to 2.0 g/cm 3. The discharge capacity is higher than that densified by other oxidizers.

关键词： chemical manganese dioxide densification sodium permanganate

ADSORPTION AND ACTIVATION OF METAL IONS ON KYANITE

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中国有色金属学会会刊：英文版 1996年第3期6卷 22-24页

作者： Dong Hongjun Chen Jin(Department of Mineral Engineering,central south university of Technology, changsha 410083. CENT S UNIV TECHNOL DEPT MINERAL ENGNCHANGSHA 410083PEOPLES R CHINA

ＡＤＳＯＲＰＴＩＯＮＡＮＤＡＣＴＩＶＡＴＩＯＮＯＦＭＥＴＡＬＩＯＮＳＯＮＫＹＡＮＩＴＥ￥ＤｏｎｇＨｏｎｇｊｕｎ；ＣｈｅｎＪｉｎ（ＤｅｐａｒｔｍｅｎｔｏｆＭｉｎｅｒａｌＥｎｇｉｎｅｅｒｉｎｇ，ＣｅｎｔｒａｌＳｏｕｔｈＵ... 详细信息

ＡＤＳＯＲＰＴＩＯＮＡＮＤＡＣＴＩＶＡＴＩＯＮＯＦＭＥＴＡＬＩＯＮＳＯＮＫＹＡＮＩＴＥ￥ＤｏｎｇＨｏｎｇｊｕｎ；ＣｈｅｎＪｉｎ（ＤｅｐａｒｔｍｅｎｔｏｆＭｉｎｅｒａｌＥｎｇｉｎｅｅｒｉｎｇ，ＣｅｎｔｒａｌＳｏｕｔｈＵｎｉｖｅｒｓｉｔｙｏｆＴｅｃｈｎｏ...

关键词： metal ion kyanite sodium oleate adsorption flotation

Almost simple groups with socle ^3._4(q)act on finite linear spaces

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Science china Mathematics 2006年第12期49卷 1768-1776页

作者： LIU Weijun, DAI Shaojun & GONG Luozhong School of Mathematics, central south university, changsha 410075, china Department of Mathematics, Hunan {3. of Science and Engineering, Yongzhou 425006, china 1. School of Mathematics Central South University Changsha 410075 China 2. Department of Mathematics Hunan University of Science and Engineering Yongzhou 425006 China

After the classification of flag-transitive linear spaces,attention has now turned to line-transitive linear *** spaces are first divided into the point-imprimitive and the point-primitive,the first class is usually easy by the theorem of Delandtsheer and *** primitive ones are now subdivided,according to the O'Nan-Scotte theorem and some further work by Camina,into the socles which are an elementary abelian or non-abelian *** this paper,we consider the ***,T ≤ G ≤ Aut(T) and G acts line-transitively on finite linear spaces,where T is a non-abelian *** obtain some useful *** particular,we prove that when T is isomorphic to 3.4(q),then T is line-transitive,where q is a power of the prime p.

关键词： line-transitive,linear space,automorphism,almost simple group.

PREPARATION AND APPLICATION OF ANTIMONY MONO (ISOOCTYL THIOGLYCOLATE) DI (N-DODECANETHIOL)

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Journal of central south university 1999年第1期11卷 33-35页

作者： Shu Wanyin Jiang Youyun Qulong (Department of Chemistry, central south university of Technology, changsha 410083.china) Department of Chemistry Central South University of Technology Changsha 410083 China

ＡｎｔｉｍｏｎｙｍｅｒｃａｐｔｉｄｅｉｓａｎｅｗｔｙｐｅｏｆｈｅａｔｓｔａｂｉｌｉｚｅｒｆｏｒＰＶＣ，ｗｈｉｃｈｈａｓｔｈｅｆｏｌｏｗｉｎｇｃｈａｒａｃｔｅｒｉｓｔｉｃｓ：ｈｉｇｈｅｆｆｉｃｉｅｎｃｙ，ｎｏｎｔｏｘ... 详细信息

ＡｎｔｉｍｏｎｙｍｅｒｃａｐｔｉｄｅｉｓａｎｅｗｔｙｐｅｏｆｈｅａｔｓｔａｂｉｌｉｚｅｒｆｏｒＰＶＣ，ｗｈｉｃｈｈａｓｔｈｅｆｏｌｏｗｉｎｇｃｈａｒａｃｔｅｒｉｓｔｉｃｓ：ｈｉｇｈｅｆｆｉｃｉｅｎｃｙ，ｎｏｎｔｏｘｉｃｏｒｈａｒｍｆｕｌｅｓ，ｌｏｗ...

关键词： heat stabilizer antimony mercaptide antimony mono(isooctyl thioglycolate) di(n dodecanethiol) polyvinyl chloride

ANALYSIS OF DISSIPATIVE STRUCTURE IN MATERIAL COMMINUTION

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中国有色金属学会会刊：英文版 1995年第1期5卷 21-24,41页

作者： Zhang Zhitie(Department of Mechanical Engineering, central south university of Technology, changsha 410083. CENT S UNIV TECHNOL DEPT MECH ENGNCHANGSHA 410083PEOPLES R CHINA

ＡＮＡＬＹＳＩＳＯＦＤＩＳＳＩＰＡＴＩＶＥＳＴＲＵＣＴＵＲＥＩＮＭＡＴＥＲＩＡＬ　ＣＯＭＭＩＮＵＴＩＯＮＺｈａｎｇ；Ｚｈｉｔｉｅ（ＤｅｐａｒｔｍｅｎｔｏｆＭｅｃｈａｎｉｃａｌＥｎｇｉｎｅｅｒｉｎｇ，ＣｅｎｔｒａｌＳｏ... 详细信息

ＡＮＡＬＹＳＩＳＯＦＤＩＳＳＩＰＡＴＩＶＥＳＴＲＵＣＴＵＲＥＩＮＭＡＴＥＲＩＡＬ　ＣＯＭＭＩＮＵＴＩＯＮＺｈａｎｇ；Ｚｈｉｔｉｅ（ＤｅｐａｒｔｍｅｎｔｏｆＭｅｃｈａｎｉｃａｌＥｎｇｉｎｅｅｒｉｎｇ，ＣｅｎｔｒａｌＳｏｕｔｈＵｎｉｖｅｒｓｉｔｙｏｆＴｅ...

关键词： material comminution dissipative structure catastrophe nonlinear thermodynamics dynamics