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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

Effect of Alloying Elements on the Quality of Hard Anodic Oxidation Film in Aluminum Alloy 6061

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稀有金属材料与工程 2011年第S3期40卷 59-62页

作者： Yang Yin, Shen Jian, Yan Xiaodong, Xu Xiaojing, Li Junpeng, Jiang Tao beijing general research institute for Non-ferrous Metals, beijing 100088, china beijing Gen Res Inst Nonferrous Met Beijing 100088 Peoples R China

the effect of different Mg/Si and Mn content on uniformity and consistence of anodic films of 6061 aluminum alloy was investigated by using hardness test,coating thickness test, optical microscopy (OM),scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS). The results show that when Mg/Si is in the vicinity of 1.73 and Mn content is 0.14%, the uniformity of the anodic film is the best while the consistence of the anodic film is the best when Mg/Si is 1.88 and Mn content is 0.14%. Superfluous silicon and magnesium have a bad function on the uniformity of anodic films of 6061 aluminum alloy because of secondary phases but magnesium in the base material can be beneficial for the consistence of the anodic film due to formation of a protective, impermeable layer of MgO below the anodic film while plentiful excess silicon result in single Si and w(Cu4Mg5Si4Alx) to gather in the grain boundary, which makes rarefactions and discontinuity present. The uniformity and consistence of anodic films are improved by Mn content rising, which is caused by the decrease of needle-like Fe-rich and Mg2Si phases and the increase of bone-like Fe-rich phases.

关键词： aluminum alloy 6061 uniformity densification anodic oxidation film

Hydrogen storage properties of non stoichiometric AB_2-type metal hydride

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中国有色金属学会会刊：英文版 2000年第3期10卷 289-293页

作者： TU Hai ling(屠海令), HUANG Zhuo(黄倬), GAO Hui long(高会龙), ZHAN Feng(詹锋) beijing general research institute for Non ferrous Metals, beijing 100088, P.R.china 北京有色金属研究总院北京

Hydrogen storage properties of non stoichiometric AB 2 type alloys, Ti 0.8 Zr 0.2 (MnCrVFe) 2- x ( x =0, 0.1, 0.2, 0.3), have been studied. The results show that the structures of the substoichiometric alloys can be described using the replacement model, that is, some A side atoms occupy the primary B side atom positions. The equilibrium pressures of the alloys decrease gradually and the hysteresis effect between hydriding and dehydriding process decreases with the increase of x value. The free energy change (Δ G ) between hydriding and dehydriding process has a significant effect on the hysteresis of the alloys. The p c t plateau region becomes narrow and the reversible hydrogen capacity decreases with the increase of x value ( x >0.1), although the hydrogen absorption capacity increases. The alloy with x =0.1 shows the optimum hydrogen storage properties.

关键词： hydrogen storage property substoichiometric alloy hysteresis effect

Experiments and sensitivity analyses for heat transfer in a meter-scale regularly fractured granite model with water flow

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2012年第12期13卷 958-968页

作者： Wei LU1,2,Yan-yong XIANG1 (1School of Civil Engineering,beijing Jiaotong University,beijing 100044,china) (2State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin,china institute of Water Resources and Hydropower research,beijing 100038,china) School of Civil Engineering Beijing Jiaotong University Beijing China State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin China Institute of Water Resources and Hydropower Research Beijing China

Experiments of saturated water flow and heat transfer were conducted for a meter-scale model of regularly fractured granite. The fractured rock model （height 1502.5 ram, width 904 mm, and thickness 300 mm）, embedded with two vertical and two horizontal fractures of pre-set apertures, was constructed using 18 pieces of intact granite. The granite was taken from a site currently being investigated for a high-level nuclear waste repository in china. The experiments involved different heat source temperatures and vertical water fluxes in the embedded fractures either open or filled with sand. A finite difference scheme and computer code for calculation of water flow and heat transfer in regularly fractured rocks was developed, verified against both the experimental data and calculations from the TOUGH2 code, and employed for parametric sensitivity analyses. The experiments revealed that, among other things, the temperature distribution was influenced by water flow in the fractures, especially the water flow in the vertical fracture adjacent to the heat source, and that the heat conduction between the neighboring rock blocks in the model with sand-filled fractures was enhanced by the sand, with larger range of influence of the heat source and longer time for approaching asymptotic steady-state than those of the model with open fractures. The temperatures from the experiments were in general slightly smaller than those from the numerical calculations, probably due to the fact that a certain amount of outward heat transfer at the model perimeter was unavoidable in the experiments. The parametric sensitivity analyses indicated that the tem- perature distribution was highly sensitive to water flow in the fractures, and the water temperature in the vertical fracture adjacent to the heat source was rather insensitive to water flow in other fractures.

关键词： Fractured granite Water flow Heat transfer Physical modeling Numerical calculation Sensitivity analysis

Kinetics of Hydrogen Absorption in Hydrogen Storage Alloy

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International Journal of Minerals,Metallurgy and Materials 1997年第2期11卷 34-37页

作者： LIN Qin CHEN Ning YE Wen LIU Renmin(Applied Science School, USTB, beijing 100083, china) (general research institute of Non-Ferrous Metals beijing, 100088) USTB Beijing China

Hydrogenation kinetics of MLNi3.8(Co,Mn,Al)1.2 and MLNi3.7(Co,Mn,Al)1.2Cu0.1 alloy in α + β phase at the temperatUre range of 30 ～70 ℃ has been studied. The kinetic mechanism of hydrogen absorption is not affected by initial hydrogen pressure. Temperature does not influence the rate of hydrogen absorption obviously. In the prior and later period of hydrogen absorption the rate-controlling step is chemical reaction and hydrogen diffusion in the hydride phase respectively for MLNi3.8(Co,Mn,Al)1.2 alloy. Adding Cu, the rate-controlling step changes from chemical reaction to the nucleation and growth of β phase in the prior period and the process of hydrogen absorption still controlled by diffusion in the later period.

关键词： hydrogen storage alloy α+β phase hydrogenation kinetics

CRUD FORMATION AND ITS CONTROL IN SOLVENT EXTRACTION

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CRUD FORMATION AND ITS CONTROL IN SOLVENT EXTRACTION

SEPARATION OF Ta AND Nb BY EXTRACTION WITH SEC-OCTANOL-HF-H_2SO_4 SYSTEM

International Solvent Extraction Conference 2005

作者： WANG Chengyan beijing general research institute of mining & Metallurgy beijing 100044 china

来源： cnki会议评论

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cnki会议

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中国有色金属学会会刊：英文版 1996年第3期6卷 40-43页

作者： Chen Huifang He Wannian Zhang Yuqi(beijing general research Instilute for Nonferrous Metals, beijing 100088) beijing general research institute for Nonferrous Metals Beijing 100088 China

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关键词： sec-octanol Ta Nb extraction

Preparation and Characteristic of Self-regulation Water-transmitting Coating Fiber

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Journal of Wuhan University of Technology(Materials Science) 2009年第4期24卷 520-524页

作者：张增志 research institute of Ecological and Functional Materials China University of Mining and Technology(Beijing)

Common clay, Kaolin and Bentonite were used as additives to prepare water-transmitting coating fiber, respectively, and the water-transmitting characteristic of coating fiber was studied. Different water-transmitting coating fibers were prepared by coating fiber using coating material with different mass proportions of additives to adhesive. And the coating materials were made from three kinds of inorganic clays as additives respectively and polyvinyl alcohol （PVA） as adhesive. Furthermore, the surface morphology and water-transmitting capacity of coating fiber were studied by SEM, Perkin Elmer Diamond SII thermal multi-analyzer and instrument for quick measurement moisture M30. The experimental results indicate that water-transmitting coating fibers made from three kinds of clays all have water-transmitting capacity. The surface of water-transmitting coating fiber prepared by common clay T is continuous and compact, and the water-transmitting effect is better than coating fibers made from other clays.

关键词： self-regulation water-transmitting coating fiber storage and controlled-release film composite film inorganic clay

Optimization of Rolling Process for Bi(2223)/Ag Superconducting Tapes by a Statistical Method

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Rare Metals 2001年第1期20卷 66-68页

作者： Xuefeng Li, Peiwen Hua, Wenquan Wang, Qijian Jin, Yiru Zhou, Guansen Yuan (general research institute for Nonferrous Metals, beijing 100088, china) 北京有色冶金研究总院北京 100088

Ag-sheathed (Bi,Pb)(2)SoCa(2)Cu(3)O(x) tapes were prepared by the powder-in-tube method. The influences of rolling parameters on superconducting characteristics of Bi(2223)/Ag tapes were analyzed qualitatively with a statistical method. The results demonstrate that roll diameter and reduction per pass significantly influence the properties of Bi(2223)/Ag superconducting tapes while roll speed does less and working friction the least. An optimized rolling process was therefore achieved according to the above results.

关键词： Bi(2223)/Ag multifilamentary tapes rolling process statistical method optimization