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中水相的pHeq变化不大,说明萃取前后水相pH值相对恒定,这对连续多级萃取是有利的.综合考虑,选择先在pH=9.0条件下采用HA体系萃镍,再在pH=7.2条件下采用HA+TRPO体系萃锌. 图3 初始pH对镍锌分离系数的影响 Fig. 3 Effect of initial pH value on separation factor of nickel and zinc...;锌镍萃取与分离的工艺流程图 Fig. 15 Flow sheet for extraction and separation of zinc and nickel 2) 采用HA体系萃取镍的最佳萃取条件为:萃取时间为10 min,温度为25 ℃,初始pH为9.0,相比O/A为1:1,萃取剂(HA)浓度为0.5 mol/L.经过4级逆流萃取,镍的萃取率为98.5%,而锌的共萃量较低(小于......
Selective separation of copper and cadmium from zinc solutions by low current density electrolysis YANG Bo(杨 卜), WANG Cheng-yan(王成彦), LI Dun-fang(李敦钫), YIN Fei(尹 飞), CHEN Yong-qiang(陈永强), WANG... and cadmium could be separated from zinc in sulphate solution by electrodeposition using special equipment[16-17]. Up to now, there is less research report on the separation of copper, cadmium and zinc......
Trans. Nonferrous Met. Soc. China 28(2018) 1027-1035 Separation of arsenic and antimony from dust with high content of arsenic by a selective sulfidation roasting process using sulfur Cheng TAN, Lei... Abstract: The separation of arsenic and antimony from dust with high content of arsenic was conducted via a selective sulfidation roasting process. The factors such as roasting temperature, roasting......
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: The traditional zinc hydro-metallurgy generates a large amount of zinc ferrite residue rich in valuable metals. The separation of iron is crucial for resource recycling of valuable metals in zinc ferrite residue... leaching residue; reduction roasting; metal separation 1 Introduction Zinc ferrite is a by-product of traditional hydro-metallurgical zinc smelting process which is insoluble in low acid conditions......
Studies on Oxygen Characteristics of YBa2Cu3O7-x and Its Applications to Air Separation and Gas Purification Guo Yiqun1,Gao Zhishuang2,Lu Hongxia2,Yang Delin2,Mo Jiong2,Hu Xing2 (1.Department... low oxygen partial pressure make the material desirable for air separation and gas purification. High purity nitrogen gas was produced with the YBCO molecular sieves in the air separation and gas......
J. Cent. South Univ. (2016) 23: 3108-3114 DOI: 10.1007/s11771-016-3376-6 Effect of magnetic pulse pretreatment on grindability of a magnetite ore and its implication on magnetic separation YU Jian... distribution of the magnetite ore. Significant micro-cracks or fractures are not found by SEM analysis in magnetic pulse treated sample. Magnetic separation of magnetic pulse treated and untreated magnetite......
Numerical simulation and optimization of red mud separation thickener with self-dilute feedZHOU Tian(周天)1, 2, LI Mao(李茂)1, 2, 3, ZHOU Chenn-qian(周谦)1, 2, 3, ZHOU Jie-min(周孑民)1, (1. School of Energy... Engineering, Purdue University Calumet, Hammond 46323-2094, United States)Abstract:In order to acquire the flow pattern and investigate the settling behavior of the red mud in the separation thickener......
J. Cent. South Univ. (2021) 28: 72-88 DOI: https://doi.org/10.1007/s11771-021-4587-z Separation and purification of tantalum from plumbomicrolite of amazonite deposit in Kola Peninsula by acid... residue were determined. Fluoride-sulfuric acid and fluoride-nitric acid schemes were proposed for PMC leaching by an extractive separation of tantalum form niobium, lead and impurities, and production......
in precious metal hydrometallurgical field. Chelating resins with thiourea groups are expected to be new type functional materials for separation and recovery of precious metals. Recently, some attempts... adsorption-desorption cycles remains 90% that of the first time, and the separation factors of ATR for binary metal ion solutions are larger than 995, indicating that ATR is of good regeneration......
