检索结果-南通市图书馆

Rare Metals 2024年第4期43卷 1786-1792页

作者： Yuan-Feng Xie Xing-Cheng Xie Zhong-Wu Li Rui-Jun Cao Zhong-Kun Lin Qing Li Chen-Guang Lin Powder metallurgy and Special Materials Research department General Research Institute for Nonferrous Metals

The effects of cryogenic treatment（CT） and tempering-cryogenic treatment（TCT） on the microstructure and properties of coarse-grained WC-10Co cemented carbides with different carbon contents were researched.The binder phase,WC mean grain sizes,W solubility in the binder,relative magnetic s aturation,densities,hardness,wear resistance and second phase precipitation of cemented carbides with different heat treatments were discussed.The results show that there are significant changes of microstructure and properties in the samples with CT and TCT,especially due to the precipitation of metastable nanoparticles WxCoyCzin the binder during the heat treatments of CT and TCT.With the simultaneous combination of microstructure and nanoparticle-reinforced binder,a dramatically improved combination of hardness and wear resistance of the samples after TCT has been achieved.

关键词： Cryogenic treatment Tempering Coarse-grained cemented carbide Carbon content Nanoparticle-reinforced binder

PREPARATION OF ULTRAFINE NICKEL POWDER

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中国有色金属学会会刊：英文版 1996年第2期6卷 22-23,4+25页

作者： Chai Liyuan Zhong Haiyun(department of nonferrous metallurgy,Central South University of Technology, Changsha 410083) department of nonferrous metallurgy Central South University of Technology Changsha 410083 China

ＰＲＥＰＡＲＡＴＩＯＮＯＦＵＬＴＲＡＦＩＮＥＮＩＣＫＥＬＰＯＷＤＥＲＣｈａｉＬｉｙｕａｎ；ＺｈｏｎｇＨａｉｙｕｎ（ＤｅｐａｒｔｍｅｎｔｏｆＮｏｎｆｅｒｒｏｕｓＭｅｔａｌｌｕｒｇｙ，ＣｅｎｔｒａｌＳｏｕｔｈＵｎｉｖｅｒ... 详细信息

ＰＲＥＰＡＲＡＴＩＯＮＯＦＵＬＴＲＡＦＩＮＥＮＩＣＫＥＬＰＯＷＤＥＲＣｈａｉＬｉｙｕａｎ；ＺｈｏｎｇＨａｉｙｕｎ（ＤｅｐａｒｔｍｅｎｔｏｆＮｏｎｆｅｒｒｏｕｓＭｅｔａｌｌｕｒｇｙ，ＣｅｎｔｒａｌＳｏｕｔｈＵｎｉｖｅｒｓｉｔｙｏｆＴｅｃｈｎｏｌｏｇｙ，...

关键词： ultrafine nickel powder nickel sulphate hydrazine

INFLUENCE OF ALKALI HALIDE ADDITIONS ON TANTALUM POWDER PRODUCTION

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中国有色金属学会会刊：英文版 1996年第3期6卷 36-39页

作者： Chai Liyuan Zhong Haiyun(department of nonferrous metallurgy,Cenlral South University of Technology, Changsha 410083) department of nonferrous metallurgy Central South University of Technology Changsha 410083 China

ＩＮＦＬＵＥＮＣＥＯＦＡＬＫＡＬＩＨＡＬＩＤＥＡＤＤＩＴＩＯＮＳＯＮＴＡＮＴＡＬＵＭＰＯＷＤＥＲＰＲＯＤＵＣＴＩＯＮ￥ＣｈａｉＬｉｙｕａｎ；ＺｈｏｎｇＨａｉｙｕｎ（ＤｅｐａｒｔｍｅｎｔｏｆＮｏｎｆｅｒｒｏｕｓＭｅｔａ... 详细信息

ＩＮＦＬＵＥＮＣＥＯＦＡＬＫＡＬＩＨＡＬＩＤＥＡＤＤＩＴＩＯＮＳＯＮＴＡＮＴＡＬＵＭＰＯＷＤＥＲＰＲＯＤＵＣＴＩＯＮ￥ＣｈａｉＬｉｙｕａｎ；ＺｈｏｎｇＨａｉｙｕｎ（ＤｅｐａｒｔｍｅｎｔｏｆＮｏｎｆｅｒｒｏｕｓＭｅｔａｌｌｕｒｇｙ，ＣｅｎｌｒａｌＳｏｕ...

关键词： K2TaF7 diluent phase diagram molten salt system Ta powder specific capacity

Current Efficiency of Low Temperature Aluminum Electrolysis Studied by Neural Network

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International Journal of Minerals,metallurgy and Materials 1999年第2期13卷 107-110页

作者： Huimin Lu Zuxian Qiu Keming Fang Fuming Wang Yanruo Hong( metallurgy School, University of Science and Technology Beijing, Beijing 100083, China)( department of nonferrous metallurgy, Northeastern University, Shenyang 110006, China) metallurgy School University of Science and Technology Beijing Beijing 100083 China department of nonferrous metallurgy Northeastern University Shenyang 110006 China

A prediction model for Current Efficiency (CE) of low temperature aluminum electrolysis (LTAE) with the low molar ratioelectfolyte of Na3AIF6-AIF3 - CaF2-MgF2-LiF -Al2O3 system was investigated based on artificial neural network principles. The nonlinearmapping between CE of LATE and various electrolytic conditions was obtained from a number of experimental data and used to predictCE of LATE. The trsined neural networks possessed high precision and resulted in a good predicting effect. As a result, attificial neuralnetworks as a new cooperating and predicting technology provide a new approach to the further studies on low temperature aluminumelectrolysis.

关键词： low temperatre aluminum electrolysis current efficiency neural network prediction model low molar ratio electrolyte

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

Ｃｈｅｍｉｃａｌｍａｎｇａｎｅｓｅｄｉｏｘｉｄｅ（ＣＭＤ）ｉｓｏｎｅｏｆｔｈｅｉｍｐｏｒｔａｎｔｍａｔｅｒｉａｌｓｆｏｒｄｒｙｂａｔｅｒｉｅｓ．Ｉｔｓｑｕａｌｉ－ｔｙｐｒｏｄｕｃｅｓａｇｒｅａｔｉｍｐａｃｔｏｎｔｈｅ... 详细信息

Ｃｈｅｍｉｃａｌｍａｎｇａｎｅｓｅｄｉｏｘｉｄｅ（ＣＭＤ）ｉｓｏｎｅｏｆｔｈｅｉｍｐｏｒｔａｎｔｍａｔｅｒｉａｌｓｆｏｒｄｒｙｂａｔｅｒｉｅｓ．Ｉｔｓｑｕａｌｉ－ｔｙｐｒｏｄｕｃｅｓａｇｒｅａｔｉｍｐａｃｔｏｎｔｈｅｄｉｓｃｈａｒｇｅｐｅｒｆｏｒ－ｍ...

关键词： chemical manganese dioxide densification sodium permanganate

SELECTION OF DILUENTS FOR COPPER EXTRACTION FROM OIL PRODUCTS

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Journal of Central South University 1998年第1期10卷 36-38页

作者： Luo Aiping Zhang Qixiu(department of nonferrous metallurgy, Central South University of Technology,Changsha 410083,China) department of nonferrous metallurgy Central South University of Technology Changsha 410083 China

ＳＥＬＥＣＴＩＯＮＯＦＤＩＬＵＥＮＴＳＦＯＲＣＯＰＰＥＲＥＸＴＲＡＣＴＩＯＮＦＲＯＭＯＩＬＰＲＯＤＵＣＴＳ＊ＬｕｏＡｉｐｉｎｇＺｈａｎｇＱｉｘｉｕ（ＤｅｐａｒｔｍｅｎｔｏｆＮｏｎｆｅｒｒｏｕｓＭｅｔａｌｕｒｇｙ，Ｃｅ... 详细信息

ＳＥＬＥＣＴＩＯＮＯＦＤＩＬＵＥＮＴＳＦＯＲＣＯＰＰＥＲＥＸＴＲＡＣＴＩＯＮＦＲＯＭＯＩＬＰＲＯＤＵＣＴＳ＊ＬｕｏＡｉｐｉｎｇＺｈａｎｇＱｉｘｉｕ（ＤｅｐａｒｔｍｅｎｔｏｆＮｏｎｆｅｒｒｏｕｓＭｅｔａｌｕｒｇｙ，ＣｅｎｔｒａｌＳｏｕｔｈＵｎｉｖｅｒｓ...

关键词： solvent extraction diluent copper

EFFECTS　OF　TEMPERATURE　ON　DISTRIBUTION　BEHAVIORS　OF　MINOR　ELEMENTS　IN　COPPER　FLASH　SMELTING──COMPUTER　SIMULATION

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中国有色金属学会会刊：英文版 1996年第4期6卷 38-41页

作者： Tan Pengfu Zhang Chuanfu(department of nonferrous metallurgy,Central South University of Technology,Changsha 410083) Tong Rae Cho(department of Metallurgical Engineering,Chungnam National University,South Korea) department of nonferrous metallurgy Central South University of Technology Changsha 410083 China department of Metallurgical Engineering Chungnam National University South Korea

ＥＦＦＥＣＴＳＯＦＴＥＭＰＥＲＡＴＵＲＥＯＮＤＩＳＴＲＩＢＵＴＩＯＮＢＥＨＡＶＩＯＲＳＯＦＭＩＮＯＲＥＬＥＭＥＮＴＳＩＮＣＯＰＰＥＲＦＬＡＳＨＳＭＥＬＴＩＮＧ──ＣＯＭＰＵＴＥＲＳＩＭＵＬＡＴＩＯＮ￥ＴａｎＰｅｎｇｆ... 详细信息

ＥＦＦＥＣＴＳＯＦＴＥＭＰＥＲＡＴＵＲＥＯＮＤＩＳＴＲＩＢＵＴＩＯＮＢＥＨＡＶＩＯＲＳＯＦＭＩＮＯＲＥＬＥＭＥＮＴＳＩＮＣＯＰＰＥＲＦＬＡＳＨＳＭＥＬＴＩＮＧ──ＣＯＭＰＵＴＥＲＳＩＭＵＬＡＴＩＯＮ￥ＴａｎＰｅｎｇｆｕ；ＺｈａｎｇＣｈｕａｎｆｕ（Ｄｅ...

关键词： As Sb Bi Pb Zn simulation computer model thermodynamics

COMPUTER MODEL OF COPPER SMELTING PROCESS AND DISTRIBUTION BEHAVIORS OF ACCESSORY ELEMENTS

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Journal of Central South University 1997年第1期9卷 36-41页

作者： Tan Pengfu Zhang Chuanfu(department of nonferrous metallurgy. Central South University ofTechnology, Changsha 410083, China) department of nonferrous metallurgy Central South University of Technology Changsha 410083 China

A computer model has been developed to simulate the distribution behaviors of Ni, Co. Sn. Ph,Zn, As, Sb, Bi, An and Ag in copper smelting process. The model assumes that the copper smelting furnaceis in thermodynamic equilibrium. As many as 21 elements (Cu. S, Fe. Ni, Co. Sn, As, Sb. Bi, Ph. Zn.An. Ag. O, N, C, H, Ca, Mg, Al, and St) and 73 compounds are considered. This model accounts forphysical entrainment in the melts. The predictions by the present computer model are compared with theknown commercial data from Guixi Smelter in China, Home Smelter in Canada and Naoshima Smelter inJapan. The agreements between the computer predictions and the commercial data are excellent, so that thepresent computer model can be used to monitor and optimize the actual industrial operations of copper smelting. It is applicable to simulation of almost all copper pyrometallurgical processes.

关键词： simulate distribution behaviors copper smelting computer model

CAUSTIC　DECOMPOSITION　OF　SCHEELITE　AND　SCHEELITE－WOLFRAMITE　CONCENTRATES　THROUGH　MECHANICAL　ACTIVATION

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Journal of Central South University 1995年第2期7卷 16-20页

作者： Li Honggui Liu Maosheng Sun Peimei Li Yunjiao(department of nonferrous metallurgy, Central South University of Technology, Changsha, 410083, China ) department of nonferrous metallurgy Central South University of Technology Changsha China

Based on physicochemical study of the reaction between scheelite and NaOH, a new decomposition process for scheelite and scheelitewolframite concentrate, i. e., mechenically activating caustic decomposition has bee... 详细信息

关键词： mechanical activation scheelite concentrate caustic decomposition

PREPARATION OF AMMONIUM PARATUNGSTATE WITH COARSE GRAIN BY EVAPORATING CRYSTALLIZATION

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Journal of Central South University 1997年第1期9卷 32-35页

作者： Li Yunjiao San Peimei Li HongguiSu Pengtuan Zhao Zhongwei Liu Maosheng(department of nonferrous metallurgy. Central South University ofTechnology, Shangsha 410083, China) department of nonferrous metallurgy Central South University of Technology Shangsha 410083 China

A new technology for the crystallization of ammonium paratungstate with coarse grain has beenstudied. The factors influencing the physi-chemical properties of ammonium paratungstate crystal, such astemperature, concentration, seed crystal, agitation. etc. were examined. It is necessary to keep high temperature and low concentration in the process. and the addition of seed crystal and agitation with air is also in favor of the system. Ammonium paratungstate crystal with particle size of 36-42 μm and apparent density of2. 0-2. 2 g·cm- 3 were obtained by controlling suitable technological parameters.

关键词： evaporating crystallization coarse grain ammonium paratungstate