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samples are given in Table 1. 2.2 Characterization Crystal structure identification was performed using X-ray diffractometer (XRD: Philips Analytical Model No.-PW1830) equipped with Ni filtered Cu Kα... (1.54056 for Cu Kα radiation), β is the full width at half maximum in radian (FWHM), and θ is the angle of diffraction. The average crystallite size is calculated to be 19.6 nm for ZnO and increases......
under oxygen atmosphere, and constantly weighed. Phase analysis was carried out in an X-ray diffractometer (XRD) (Philips analytical PW 1710) using Cu Kα radiation of 1.5418 at 40 kV and 30... alloy [J]. Transactions of Nonferrous Metals Society of China, 2011, 21(3): 581-587. [36] ZHOU Shao-yun, LI Xin-hai, WANG Zhi-xing, GUO Hua-jun, PENG Wen-jie. Effect of activated carbon and electrolyte......
(Rigaku Co. Ltd., Tokyo, Japan), with Cu Kα radiation (1.54178 ) in 2θ range from 5° to 80°. For the XRD analysis, the Ag particles were removed from the electrode surface every 10 min, rinsed... and overpotential for hydrogen discharge than those from the nitrate electrolyte [30]. When the ammonium electrolyte was used, J0 JL is valid, and then, Ag is situated, together with Cu and Au......
be mainly divided into five types: 1) carbon based materials; 2) metal oxides and sulfides; 3) alloy-based materials; 4) titanium- based composites; 5) organic compounds [6]. Graphite, the most...]. Although metal oxides [9, 10] and sulfides [11–13] along with alloy-based materials [14–16] have high capacity, they still face a number of issues such as poor initial Coulombic efficiency and inferior......
of the integrated exploration in Kaerqueka [61]. The deposit was discovered by Qinghai Geological Survey Institute, China in 2003. The ore-forming elements are complicated, which are dominated by Cu, Pb and Zn and accompanied with Fe, Au, Ag and so on [61]. The exposed rocks were mainly granitic intrusive rocks, followed by a small amount of Ordovician-Silurian Tanjianshan group of marble and basic......
. Temperature control for thermal treatment of aluminum alloy in a large-scale vertical quench furnace [J]. Journal of Central South University, 2016, 23(7): 1719–1728. [4] QIAO Jing-hui, CHAI Tian-you......
bar of 1500 mm, an absorbing bar of 500 mm in length, a data-processing device and a signal recording device. The suitable d50 mm bar is made of high-strength alloy, with an ultimate strength of 800 MPa......
相,使钴保留在萃余液中.控制P204萃余液的成分ρ(Cu)≤0.002 g/L,ρ(Fe)≤0.005 g/L,ρ(Mn)≤ 0.01 g/L,ρ(Zn)≤0.005 g/L；P507萃取工序目的是实现钴与镍的分离,使钴萃取进入P507负载有机相,而镍留在萃余液中,要求萃余液中ρ(Co)≤0.1 g/L,P507负载有机相用硫酸溶液或盐酸溶液反萃,反萃液经过除油后浓缩结晶,分别得到硫酸钴或氯化钴产品. 1.2 P204反萃液产出 从上述钴矿湿法冶金工艺可以看出,P204萃取深度除杂过程是至关重要的.P204(二乙基己基磷酸)是一种广谱的阳离子萃取剂,在酸性介质中萃取金属离子由大到小依次为Fe3+,Zn2+,Cu2+,Mn2+,Co2+,Ni2+,Mg2+,Ca2+,所以,在P204萃取除杂过程中,Fe,Zn,Cu,Mn和部分Co会被P204萃取,后续采用盐酸溶液对P204负载有......
and 4PC can extract Cu(II), Ni(II), and Co(II) from acidic multi-metal sulfate solutions with about pH 2, and the extraction efficiency of copper is higher than that of other metal ions [5]. Moreover... patterns were recorded on a SAXSess system (Anton-Paar, Austria) with a Cu Kα radiation (0.1542 nm) operating at 50 kV and 40 mA [26]. Samples were introduced into a quartz capillary and placed inside......
,推高了Ni,Co分离的成本. 在热力学上,Ni,Co与NH3络合能力不同,例如Co,Ni与NH3虽然均能结合形成,(n＜6),但是与的络合常数分别为4.39和 8.31,络合能力相差较大[22-23].壳聚糖是一种价廉,安全,无毒的高分子聚合物,其分子中带有游离氨基,由自然界广泛存在的几丁质经过脱乙酰得到.壳聚糖具有吸附特性,已用于吸附Cu,Au,Zn,Cr和Hg[24-28].这种独特的氨基特性...,氯化体系中Ni,Co的分离[12-16],如李凡等[10]采用P204-磺化煤油体系,研究硫化镍精矿浸出液中杂质Ca,Fe的脱除,结果表明,在试验确定的最佳条件下,Ca,Fe萃取率均达97%以上,较好地实现了浸出液中Ni与杂质的分离.邬建辉等[14]采用钠皂化的P507-磺化煤油体系,研究硫酸镍溶液中Co,Zn,Cu的萃取脱除,经三级逆流萃取,钴的萃取率可达94.17 %,负载有机相用1mol/L......
