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738毫秒
]. Because of the lack of effective zinc extraction reagents and relatively low prices of zinc metal, the applications of solvent extraction of zinc from sulfate solution are limited [8-9]. Organic.../min. 3.6 Effect of concentration of metal ions on extraction ratio of zinc The effect of the concentration of metal ions on the extraction ratio of zinc was investigated under the conditions......
Article ID: 1003-6326(2005)03-0642-06 Influence of concentration of zinc ions on electrocrystallization process of zinc ZHANG Zhao(张 昭) (Department of Chemistry, Zhejiang University... on zinc electroplating process. The results show that, at high overpotentials, the nucleation of zinc is instantaneous, and nuclear density increases with the overpotentials increasing. While at low......
concentrate is the main raw material for extracting zinc. Many investigations have been reported for the beneficiation of zinc ore to prepare concentrate from which zinc metal is produced..., and increased flexibility[16]. The present work reports such a study carried out on zinc sulfide concentrate, with high metal impurities. The process is based on a direct leaching with oxygen of bulk......
......
in the great worldwide demand for this metal that currently reaches an overall production of 9 million tones per year[1]. However, even though the electrolytic processing of zinc has been in practice... of zinc electrowinning is largened. The phenomena of metal ions’ sparsity in cathode portion is further adjusted by increasing temperature, but it is seen from the figures of cathode polarization curve......
zinc leaching residue as the sulfur source for metal recovery and stabilization [J]. Minerals Engineering, 2014, 61: 105-112. DOI: 10.1016/j.mineng.2014.03.022. [4] CHEN T T, DUTRIZAC J E. Mineralogical... J. Cent. South Univ. (2020) 27: 1186-1196 DOI: https://doi.org/10.1007/s11771-020-4359-1 Sulfidation roasting of zinc leaching residue with pyrite for recovery of zinc and iron MIN Xiao-bo(闵小波)1, 2......
of the Institute of Metal Finishing, 2005, 83(6): 291-295. [13] JIN Bi-jian, YANG Xian-wan. Application of gas diffusion anode for zinc hydrometallurgy[J]. Yunnan Metallurgy, 2007, 36(3): 37-39. (in Chinese... of lead-cobalt alloy coated lead composite anodes for zinc electrowinning[J]. Transactions of the Institute of Metal Finishing, 2005, 83(6): 296-299. [18] HUANG Hui, ZHOU Ji-yu, GUO Zhong-cheng......
and mechanism study on leaching high silicon zinc oxide ore with sulfuric acid [J]. Nonferrous Metal (Smelting Section), 2003(5): 9-23. (in Chinese) [4] DUFRESNE R E. Quick leach of siliceous zinc ore [J]. Journal of Metals, 1976, 28: 8-12. [5] LI Guo-min. Research on leaching de-silication process of zinc oxide ore with high silicon [J]. China Nonferrous Metal, 2005(4): 32-35. (in Chinese) [6......
cadmium can be recovered through solvent extraction, electrolysis refining or vacuum distillation[7-15]. The metal elements in copper-cadmium slag are zinc, cadmium, copper and their oxides with a little... to 3-4. Finally, pure cadmium metal is deposited by electrolysis. The process for cadmium extraction is complicated and also needs a large quantity of zinc powder. Some studies have shown that copper......
and 0.1 mol/L EDTA-Na2 solution can extensively extract Cd, Cu, Fe, Pb and Zn from zinc smelting slag. Key words: zinc smelting slag; metal values; two-step sequential extraction; sulfuric acid; EDTA-Na2 1..., Cu in solids [7, 23]. In this work, two-step procedure combining acid with EDTA-Na2 was conducted to extract metal values from a zinc smelting slag. The aims of this work were: 1) to choose......
