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by reduction process, solvent extraction, precipitating vanadium with ammonium water, and pyrolysis from the stone-coal oxygen pressure acid-leaching solution. The total recovery efficiency of vanadium... technology. The brief ?ow of the classical technology includes chloridizing roasting, water leaching, deposition, alkali melting and thermal decomposition. This classical technology has two main problems......
Effect of water on behaviour of Na2B4O7·5H2O and Na2B4O7 in HCl-CH3OH medium A. E. ERTAS, ?. GIRGIN Mining Engineering Department, Hacettepe University, Ankara 06800, Turkey Received 2... at the CH3OH/B mole ratio of 4. The decrease of water in the reaction medium was observed to increase the crystallization of NaCl in the order of Na2B4O7>Na2B4O7·5H2O. It was also observed......
(SO4)3和Fe2(SO4)3形式存在,此外还有个别未反应完全的Al2O3特征峰存在.图10所示为浸出渣XRD谱.由图10可看出,焙烧熟料经过水浸后可溶物均已进入浸出液中,而渣中则只剩SiO2. 图10 焙烧熟料水浸渣XRD谱 Fig. 10 XRD pattern of water leaching residue from roasting clinker 3..., China) Abstract: The intensification process consisting of sulfuric acid roasting – water leaching was conducted to extract U, Mo from U-Mo ore, and the single factor experiments were performed......
Metallurgy Review, 2000, 21(6): 527-600. [12] WHITTINGTON B I, MCDONALD R G, JOHNSON J A, MUIR D M. Pressure acid leaching of Bulong nickel laterite ore. Part I: Effect of water quality [J...J. Cent. South Univ. Technol. (2010) 17: 765-769 DOI: 10.1007/s11771-010-0554-9 Extraction of valuable metals from low-grade nickeliferous laterite ore by reduction roasting-ammonia leaching method......
were obtained by screen separation. Leaching tests were performed in a 1.5 L glass vessel which was placed in a water bath with temperature control. The cover of the vessel was fitted with baffles... Selective leaching of nickel from low-sulfur Ni-Cu matte at atmospheric pressure FU Yan(符 岩)1, LI Bin-chuan(李斌川)1, FAN Chuan-lin(范川林)1, ZHAI Xiu-jing(翟秀静)1, ZHANG Xi-jun(张希军)1, LI......
; leaching behaviors; lime water 1 Introduction Mid-heavy rare earths are important in many strategic fields, from advanced materials with superior properties to large-scale high-tech devices [1-4... EDTA [23], Ca(H2PO4)2 [24], HPMA and PBTCA [25]. YANG et al [12] used lime water to treat the rare earth tailings leached with aluminum sulfate by column leaching. Most of the aluminum sulfate......
Trans. Nonferrous Met. Soc. China 23(2013) 3770-3779 Water leaching kinetics and recovery of potassium salt from sintering dust Guang ZHAN, Zhan-cheng GUO State Key Laboratory of Advanced Metallurgy...-AES, SEM-EDS and XRD to examine the strengthening measures of leaching potassium salt from the sintering dust by water. The results showed that the main component of the sintering dust was iron......
J. Cent. South Univ. Technol. (2008) 15: 679-683 DOI: 10.1007/s11771-008-0126-4 Leaching kinetics of low grade zinc oxide ore in NH3-NH4Cl-H2O system WANG Rui-xiang(王瑞祥)1, 2, TANG Mo-tang(唐谟堂)1...; Abstract: The leaching kinetics of low grade zinc oxide ore in NH3-NH4Cl-H2O system......
Leaching of magnesium from desiliconization slag of nickel laterite ores by carbonation process MU Wen-ning(牟文宁)1, ZHAI Yu-chun(翟玉春)2, LIU Yan (刘 岩)2 1. Department of Materials Science... 2009; accepted 30 December 2009 ____________________________________________________________________________________________ Abstract: The leaching of magnesium from desiliconization slag of nickel......
of the surface irregularity of the solid particles on the reaction was investigated. Fitting effects of classical models and fractal models were compared by water leaching experiments of low-temperature...; shrinking core models; waste printed circuit board; water leaching 冶金过程多为涉及气,液,固间的多相反应,其显著特征是在整体反应过程中存在反应界面.界面的结构性质对反应的速率过程有着重要影响,在建立动力学模型时,是主要的参变量之一.利用经典欧氏几何对冶金过程动力学进行研究时,一般将反应界面视为平面或曲面,即将表面视为二维面.在......