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FLOWING FILM JIGGING FUNCTION IN THE NEW″IFFC″PROCESS FOR SEPARATING MINERALS OF ULTRAFINE SIZES

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中国有色金属学会会刊：英文版 1993年第2期3卷 22-26,40页

作者： Lu,Yongxin beijing general research institute of mining and Metallurgy,beijing 100044,china

The concept of the flowing film jigging was first applied to the flowing film concentration *** flowingfilm jigging function is an important element of the new process,in jection-flowing film centrifugation(IFFC),for ... 详细信息

关键词： flowing film jigging mineral processing ultrafine sizes IFFC

Effect of Microstructure and Sulfide on Corrosion of Cu-Ni Alloys in Seawater

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Journal of Materials Science & Technology 2000年第4期16卷 411-415页

作者： Xiaolong ZHU (general research institute for Nonferrous Metals, beijing 100088, china) general research institute for Nonferrous Metals Beijing 100088 China

The microstructure and the corrosion product films have been investigated on Cu-Ni alloys by TEM, SEM, AES and electrochemical technique as well as natural seawater exposure tests. Experimental results showed that the alloys had two kinds of microstructure, i.e. recrystallizatjon and incomplete recrystallization. In synthetic seawater containing 2x10^-6 S^2-, the stability of the alloy increased with the increase of deformation and annealing temperature, i.e., the degree of recrystallization. After exposure to natural seawater for different periods of time, the corrosion product films of the recrystallized alloy were rich in Ni and compact, and there were cracks in the outer layer which contained a small amount of S; the films of the alloy of incomplete recrystallization became thick, loose and porous, and obviously of layered structure, and the intergranular corrosion took place in the underlying substrate Besides, a great amount of seawater substance existed in the outer layer and some sulfur was found within the grain boundaries that prefer to corrode. The accelerating effect of sulfides in corrosion of Cu-Ni alloys in seawater is attributed to the coexistence and absorption of sulfides and carbides promoting the preference of corrosion where they absorb, and the formation of dissolvable Cu2S results in keeping the surface of the alloys in the active state.

关键词： Effect of Microstructure and Sulfide on Corrosion of Cu-Ni Alloys in Seawater Cu Ni

An Overview of Mineral Processing in china

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Rare Metals 2001年第2期20卷 69-73页

作者： Quanyuan Chen, Jingshen Zhang, Dianzuo Whng (Changsha research institute of mining and Metallurgy, Changsha 410012, china general research institute for Nonferrous Metals, beijing 100088, china) Changsha Res Inst Min & Met Changsha 410012 Peoples R China Gen Res Inst NonFerrous Met Beijing 100088 Peoples R China

The latest progress in mineral processing in china is described. It is also pointed out that the existing technology can not meet the needs of economic development. The combined challenges of poor resources, economical benefits and environmental pollution issues require further research to upgrade the separation efficiency economically. The methods of mineral processing should play a more important part in waste treatment such as wastewater treatment, the remediation of contaminated soil and the recycling of wastes. Biomineral technology will be utilised in the near future.

关键词： mineral processing biomineral technology comminution ore waste treatment

New development of biliary surgery in china

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World Journal of Gastroenterology 2000年第2期6卷 187-192页

作者： Zhi Qiang Huang The research institute of general Surgery,The general Hospital of PLA,beijing 100853,china 解放军总医院北京

CHARACTERISTICS OF BILIARY CALCULOUSDISEASES IN china:THE CHANGING SCOPEDiseases of the biliary tract in china is complicatedwith the prevalence of primary infection of the bileduct *** the middle of the 20th century,biliary infection,biliary parasitic infestation,andbiliary stones made up the three chief componentsof biliary diseases in *** to the

关键词： biliary surgery cholelithiasis intrahepatic stones carcinoma gallbladder carcinoma bile duct

MATHEMATICAL　MODELLING　OF　BUBBLE　DRIVENFLOWS　IN　A　NOVEL　ALUMINUM　ELECTROLYSIS　CELL

维普期刊数据库评论

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维普期刊数据库

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中国有色金属学会会刊：英文版 1996年第2期6卷 37-40页

作者： Gao Zhaosheng Li Guoxun Shen Jianyun(beijing general research institute for Non-ferrous Metals, beijing 100088) GEN RES INST NONFERROUS MET BEIJING 100088PEOPLES R CHINA

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ＭＡＴＨＥＭＡＴＩＣＡＬＭＯＤＥＬＬＩＮＧＯＦＢＵＢＢＬＥＤＲＩＶＥＮＦＬＯＷＳＩＮＡＮＯＶＥＬＡＬＵＭＩＮＵＭＥＬＥＣＴＲＯＬＹＳＩＳＣＥＬＬＧａｏＺｈａｏｓｈｅｎｇ；ＬｉＧｕｏｘｕｎ；ＳｈｅｎＪｉａｎｙｕｎ（ＢｅｉｊｉｎｇＧｅｎｅｒａｌＲｅｓｅａ...

关键词： mathematical modelling fluid flow aluminum electrolysis cell k-ε model

A Cold Adhesion for Self-fused Alloy Coat by High Frequency Induction

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材料热处理学报 2004年第5B期25卷 1316-1320页

作者： ZHANGZeng-zhi AIBo researchinstituteofEcofogicalandFunctionalMaterial ChinaUniversityofMiningandTechnology（Beijing）.BeijingChina

In this study, a method to prepare self-fused alloy coat, which started with a cold adhesion precoating and then induction fusing plus, is presented. It also intended to analyze the mechanism, microstructure and anitwear ability of the coat. The workpiece was precoated with Ni60 powder through an adhesion agent. The oven-dried precoat was then heated by a high frequency induction generated by 100kw power with a frequency of 250kHz. The technological parameters of the method were determined through analysis of the thermal magnetism, thermal resistivity and anti-induction mechanism. By comparing the microstrucrures and properties of the coat produced by cold adhesion, thermal spraying and laser refusing, it is concluded that: (1) One side of the workpiece should be preheated to 200℃ before induction fusion, and the range of induction frequency should be 200～250kHz. (2) The microstrucrure of the coat by cold adhesion is superior to that by thermal spraying, but the particle size range should be 0.047～0.044mm (200～320 meshes) (3) The corrosion resistance of Ni60 coat by cold adhesion is better than that by thermal spraying, and the cold adhesion is the best method to prepare the antiwear coat.

关键词：冷附着自熔融合金高频感应 Ni60

Microstructure evolution of Al-Zn-Mg-Cu-Zr alloy during hot deformation

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Rare Metals 2010年第4期29卷 426-432页

作者： YAN Liangming,SHEN Jian,LI Zhoubing,LI Junpeng,and YAN Xiaodong general research institute for Nonferrous Metals,beijing 100088,china general research institute for Nonferrous Metals Beijing China

Compression tests of the Al-Zn-Mg-Cu-Zr（7055） alloy were performed at various strains and temperatures from 300 to 450℃ under a con- stant strain rate between 10^-2 s^-1and 1 s^-1. Microstructures during hot deformation were studied by transmission electron microscopy （TEM）. Dislocation density, dislocation cells and subgrains of the deformed samples were investigated in detail and compared to make a better understanding of the microstructure evolution. The results showed that stress-strain curves under the experimental conditions belonged to the type of dynamic recovery. When the alloy deformed at various strains and 300℃, the microstructure underwent a process of disordered dislocations to cell structure, subgrain structure and subgrain coarsening. With the temperature increasing, subgrains grew and dislocation density in the interior decreased at a strain rate of 1 s^-1. At the temperature of 350℃, the average diameter of subgrains decreased, sub-boundaries broadened and dislocation density in the interior decreased when the strain rate was increased. The deformed samples of 7055 alloy had smaller subgrains than that of 7005 alloy at the same compression condition because of high alloy content.

关键词： aluminum alloy microstructure evolution dynamic recovery subgrain

Effects of Solution Treatment on the Microstructure and Mechanical Properties of Al-16.9Si-4.5Cu-0.15Mg Alloy

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稀有金属材料与工程 2011年第S3期40卷 73-77页

作者： Zhang Xun, Zhang Zhifeng, Xu Jun general research institute for Non-ferrous Metals (GRINM), beijing 100088, china Gen Res Inst Nonferrous Met GRINM Nonferrous Met Proc Div Beijing 100088 Peoples R China

In this paper, the microstructure and mechanical properties of Al-Si-Cu-Mg casting alloy under different solution conditions were investigated by optical metallographic and mechanical property test. The results show that the cast alloys were composed of α-Al, primary Si, eutectic Si, Al2Cu and Al7Cu2Fe phases. Three changes took place during solution treatment: Firstly, with the increase of solution temperature and the solution holding time extension, more and more Al2Cu phase was dissolved into the matrix; Secondly, with the increase of solution temperature and the solution holding time extension, morphology of eutectic Si, Al7Cu2Fe and other insoluble phases changed into more round; Thirdly, at the fixed solution temperature, if the solution time extended too long, it would cause grains, eutectic Si and other insoluble phases aggregated and coarsened. About mechanical properties, when the solution time was fixed, the hardness, tensile strength and the yield strength of the Al-Si-Cu-Mg alloy treated by T6 enhanced while the solution temperature increasing, and when the solution temperature was fixed, the ultimate tensile strength and the elongation of the Al-Si-Cu-Mg alloy treated by T6 increased at first and then decreased while the solution time increasing, but the hardness of the alloys affected less by the solution time.

关键词： Al-Si-Cu-Mg alloy solution treatment microstructure mechanical properties

NEW PROGRESS IN MINERAL PROCESSING——REPORT ON FIRST INTERNATIONAL CONFERENCE ON MODERN PROCESS MINERALOGY AND MINERAL PROCESSING

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有色金属 1993年第3期45卷 81-84页

作者： Shi Daxin (beijing general research institute of mining and Metallurgy, beijing 100044)

The first International Conference on Modern Process Mineralogy and Mineral Processing, organized by the Nonferrous Metals Society of china and hosted by beijing general research institute of mining and Metallurgy,was held on September 22-25,1992,in beijing,*** 350 scholars and experts from 25 countries and regions showed up at the conference and 130 papers were presented,among them 98 papers are of mineral *** of the papers given in mineral processing are summed up as follows.

关键词： NEW PROGRESS IN MINERAL PROCESSING REPORT ON FIRST INTERNATIONAL CONFERENCE ON MODERN PROCESS MINERALOGY AND MINERAL PROCESSING