共搜索到17464条信息，每页显示10条信息，共1747页。用时：0小时0分0秒612毫秒
, respectively. Key words: zinc oxide ore; NaOH roasting method; reaction process; reaction mechanism; kinetics 1 Introduction As an important nonferrous metal, zinc is widely used in galvanizing...J. Cent. South Univ. (2017) 24: 2266-2274 DOI: https://doi.org/10.1007/s11771-017-3637-z Extracting reaction mechanism analysis of Zn and Si from zinc oxide ore by NaOH roasting method CHEN Bing(陈兵......
optimization model of underground metal mine production scale. Practical results show that multidisciplinary design optimization on production scale of an underground lead and zinc mine reflect the actual operating conditions more realistically, the production scale is about 1.25 Mt/a (Lead and zinc metal content of 160 000 t/a), the economic life is approximately 14 a, corresponding coefficient......
that zinc metal produced from the concentrate was used by roast-leach-electrowinning process (RLE)[3]. The process involves a roasting step, which evolves toxic SO2 gas and requires a sulfuric acid... E-pH diagram of ZnS-H2O system during high pressure leaching of zinc sulfide MU Wang-zhong(牟望重), ZHANG Ting-an(张廷安), LIU Yan(刘 燕), GU Yan(古 岩), DOU Zhi-he(豆志河), L? Guo-zhi(吕国志), BAO Li(鲍 丽......
will appear [29]. Table 1 Stability constants of EDTA complexes of common metal ions In an actual zinc electrolyte, there are usually many interfering metal ions except matrix Zn2+. Therefore, EDTA...)). This result confirms the function of EDTA to selectively mask Zn2+ within the test solution. In order to verify the function of EDTA to mask other impurity metal ions coexisting within the zinc electrolyte, Zn2......
residue. Zinc ferrite, a franklinite, is formed in desulfurization roasting of high iron-bearing zinc sulfide, which causes losses of metal value and serious heavy metal pollution in stockpile and transportation. Beacuse of the comprehensive utilization of metal values, such as Zn, Fe, Pb, Ag, In, and the reduction of residues, it is necessary to separate zinc and iron by decomposing zinc ferrite......
Trans. Nonferrous Met. Soc. China 22(2012) 694-699 Preparation of metal zinc from hemimorphite by vacuum carbothermic reduction with CaF2 as catalyst XIONG Li-zhi1, 2, CHEN Qi-yuan1, YIN Zhou-lan1... of 2.5, the pressure of system lower than 20 kPa, the reaction time of about 40 min. Under the optimal process condition, the zinc reduction rate is about 93% from hemimorphite. Key words: metal zinc......
J. Cent. South Univ. (2012) 19: 2451-2457 DOI: 10.1007/s11771-012-1296-7 Stability of [BMIM]HSO4 for using as additive during zinc electrowinning from acidic sulfate solution ZHANG Qi-bo(张启波... University Press and Springer-Verlag Berlin Heidelberg 2012 Abstract: The stability of ionic liquid additive 1-butyl-3-methylimidazolium hydrogen sulfate ([BMIM]HSO4) during zinc electrowinning from acidic......
INITIAL ATMOSPHERIC CORROSION OF ZINC IN THE PRESENCE OF NH4Cl C.N.Cao1,C.W.Yan1,Q.Qu2,G.H.Liu2,L.LI3,L.ZHANG1 (1.Stake Key Laboratory for Corrosion and Protection,Institute of Metal Research...,Kunming 650091,China) Abstract:Influence of NH4 Cl on the initial atmospheric corrosion of zinc was investigated via quartz crystal microbalance(QCM)in laboratory at 80%RH and 25℃.The results show......
of Heavy Metal Pollution,Changsha 410083, China Received 24 August 2011; accepted 5 January 2012 Abstract: High gradient magnetic separation was conducted in order to separate insoluble zinc ferrite... Zinc is an important metal required for various applications in metallurgical, chemical and textile industries [1]. At present, the roast-leach-electrowin process accounts for the greatest share......
- microscopy investigations of lead-cobalt alloy coated lead composite anodes for zinc electrowinning [J]. Transactions of the Institute of Metal Finishing, 2005, 83(6): 296-299. [3] IVANOVI, STEFANOVY...): 791-797. [7] STEFANOVY, DOBREVT. Developing and studying the properties of Pb-TiO2 alloy coated lead composite anodes for zinc electrowinning [J]. Transactions of the Institute of Metal Finishing, 2005......
