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Mechanical engineering and Material {1.—201. International Conference on Mechanical engineering and Material {1.(MEMS 201.)

In the present work,the behavior of un-coagulable CO was experimentally investigated during the condensation process of carbothermic reduction of magnesia at condensing zone temperatures ranging from 923.K to 1.23.*** powders and magnesium lump condensates were produced under different conditions and characterized by scanning electron microscopy and energy-dispersive X-ray *** reverse reaction products C and MgO were formed following the process of magnesium vapor condensation and we just found the nearer the temperature of the condensation zone approached the liquid transition temperature,the lower the rate of the reverse reaction between CO and magnesium ***,decreases in the rate of the reverse reaction of magnesium were possible by controlling the condensation temperature in experiments.

关键词： Magnesium Vapor vacuum Reverse reaction Carbothermic reduction.

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Analysis of the behavior of magnesium and CO vapor in the carbothermic reduction of magnesia in a vacuum

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Journal of Magnesium and Alloys 2014年第1期2卷 50-58页

作者： Cheng-bo Yang Yang Tian tao {1. Bin Yang Bao-qiang Xu Yong-nian Dai national {1. laboratory for {3. metallurgy Kunming University of Science and TechnologyKunming 650093China key {1. for nonferrous {3. metallurgy of yunnan province Kunming 650093China state key laboratory {3. base of complex nonferrous metal resources clear utilization in yunnan province Kunming 650093China

The aim of this paper is to experimentally investigate the behavior of magnesium and carbon monoxide vapor in the carbothermic reduction of magnesia at condensing zone temperatures ranging from 923.K to 1.23.*** phase,surface morphology,and composition of the condensates obtained were examined by means of scanning electron microscopy and energy-dispersive X-ray *** main findings of this paper include:the reverse reaction products,carbon and magnesium oxide,were formed following the process of magnesium vapor condensation,preventing two metal clusters from mutually ***,the nearer the temperature of the condensation zone approached the liquid transformation temperature(81.-91. K),the lower the rate of the reverse reaction between carbon monoxide and magnesium *** in the rate of the reverse reaction of magnesium was possible by controlling the condensation temperature.

关键词： Carbon monoxide Magnesium vapor Carbothermic reduction Condensationvacuum

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Production of magnesium during carbothermal reduction of magnesium oxide by differential condensation of magnesium and alkali vapours

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Journal of Magnesium and Alloys 2013年第4期1卷 323-329页

Most of researchers believed that the developments on the condensation of magnesium produced by carbothermic reduction just concentrated on two process routes:the“quench”route and the“solvent”*** this paper will briefly analyzes the major challenges in magnesium vapor condensation during the {1. carbothermic reduction of calcined dolomite,on equipment upgrade,heat transfers alter,to achieve condensation control and production *** are then proposed using theoretical calculations and experiment *** analysis of the experiment results shows that the burning and even explosion of condensation products during the {1. carbothermic reduction of calcined dolomite are mainly due to the burning of crystallized powder magnesium,which results from the self-ignition of alkali ***,this paper proposes a multistage condensation solution to improve traditional {1. condensation *** result show that the condensation equipment can effectively mitigate the burning and loss during condensation,also the morphology of the condensation products {3.ly improved,the grain size increased,and the oxidation rate *** potassium/sodium vapor and the magnesium vapor were separately condensed.

关键词： Carbothermic reduction Calcined dolomite Magnesium vapor Condensation

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Properties of a new type Al/Pb-0.3.Ag alloy composite anode for zinc electrowinning

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International Journal of Minerals,{1. and Materials 2013年第10期20卷 986-993页

作者： Hai-tao Yang Huan-rong Liu Yong-chun Zhang Bu-ming Chen Zhong-cheng Guo Rui-dong Xu Faculty of metallurgical and Energy {1. Kunming University of Science and Technology Faculty of Land Resource engineering Kunming University of Science and Technology kunming Hendera {1. and technology Co.Ltd. state {1. laboratory {3. base of complex nonferrous metal resources Cleaning utilization

An A1.Pb-0.3.Ag alloy composite anode was produced via composite casting. Its electrocatalytic activity for the oxygen evolution reaction and corrosion resistance was evaluated by anodic polarization curves and accelerated corro- sion test, respectively. The microscopic morphologies of the anode section and anodic oxidation layer during accelerated corrosion test were obtained by scanning electron microscopy. It is found that the composite anode （hard anodizing） dis- plays a more compact interracial combination and a better adhesive strength than plating tin. Compared with industrial Pb-0.3.Ag anodes, the oxygen evolution overpotentials of A1.Pb-0.3.Ag alloy （hard anodizing） and A1.Pb-0.3.Ag alloy （plating tin） at 500 A.m-2 were lower by 57 and 1. mV, respectively. Furthermore, the corrosion rates of Pb-0.3.Ag alloy, A1.Pb-0.3.Ag alloy （hard anodizing）, and A1.Pb-0.3.Ag alloy （plating tin） were 1.0}977, 9.487, and 1..824 g.m-2.h-1. respectively, in accelerated corrosion test for 8 h at 2000 A-m-2. The anodic oxidation layer of A1.Pb-0.3.Ag alloy （hard anodizing） is more compact than Pb-0.3.Ag alloy and A1.Pb-0.3.Ag alloy （plating tin） after the test.

关键词： composite anodes corrosion resistance oxygen evolution reaction electrocatalytic activity zinc electrowin-ning

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