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by φ-pH diagram. The selenium reduction precipitation in oxidization-leaching solution was analyzed under the conditions of acidity of 150 g/L, the sodium sulphite concentration of 35 g/L... selenium dissolves in acid to form selenic ion in leaching solution at pH>1.65. For tetravalent selenium, at low pH, the selenic ion in the leaching solution is selenic ion , which will be oxidized......
to recover zinc by controlling the acidity of solution on the basis of conventional sulfuric acid leaching in this study. This method is an improvement of the conventional sulfuric acid leaching... the acidity of leaching solution. 3 Results and discussion 3.1 Single factor experiment 3.1.1 Effect of sulfuric acid concentration on leaching rate During the investigation on the effect......
in the form of hydroxides by adding CaO and controlling the pH value. As a result, a large amount of Ca(NO3)2 solution is produced. Figure 1 A technical route of nitric acid pressure leaching for limonitic... J. Cent. South Univ. (2020) 27: 3249-3258 DOI: https://doi.org/10.1007/s11771-020-4463-2 Nitric acid pressure leaching of limonitic laterite ores: Regeneration of HNO3 and simultaneous synthesis......
Leaching Stability of Simulated Waste Forms for Immobilizing An3+ by Gd2Zr2O7 with Nd3+卢喜瑞1,2,CHEN Mengjun1,DONG Faqin1,WANG Xiaoli3,WU Yanlin4,XIAO Zhengxue11. Key Subject Laboratory of National... University for Advanced Studies摘 要:In order to investigate the anti-leaching capability of pyrochlore Gd2Zr2O7 immobilized An3+, trivalent neodymium was used......
Formation of black nickel in leaching solution containing ammonia and chloride ZHENG Guo-qu(郑国渠), ZHENG Li-feng(郑利峰), CAO Hua-zhen(曹华珍) (College of Chemical Engineering and Materials Science, Zhejiang University of Technology, Hangzhou 310014, China) Abstract: The black nickel formation process in leaching solution containing ammonia and chloride was investigated in terms of cyclic......
Trans. Nonferrous Met. Soc. China 25(2015) 2734-2743 Crystallization of gibbsite from synthetic chromate leaching solution in sub-molten salt process Pei-yu ZHANG1,2, Guang-ye WEI1, Qiang GUO1, Jing... to remove aluminates from chromate alkali solutions and utilize aluminum-containing compounds. In this work, carbonization was used to remove aluminates from a synthetic chromate leaching solution......
Desiliconisation of alkaline leaching solution of roasted stone coal with carbonation method LONG Si-si(龙思思), ZHANG Guo-fan(张国范), FENG Qi-ming(冯其明), OU Le-ming(欧乐明), LU Yi-ping(卢毅屏... reagents[2-5]. Compared with acid (H2SO4 or HCl) leaching technology, alkali (NaOH, Na2CO3 or NaHCO3) leaching technology has lots of advantages, such as little impurity in leaching solution, which......
sodium aluminate solutions, i.e. a plant solution and a synthetic solution, were prepared before seed precipitation. The former was simulated by dissolving industrial gibbsite into the spent Bayer liquor... ARTICLE J. Cent. South Univ. (2019) 26: 312-322 DOI: https://doi.org/10.1007/s11771-019-4003-0 Intensifying gibbsite precipitation from sodium aluminate solution by adding a mixed seed LI Xiao-bin......
advantages, such as high recovery, low economic cost and less impurities in leaching solution. Key words: stone coal; roasting; acid leaching; vanadium... solution, which is beneficial to the purification of leaching solution and obtaining high quality vanadium pentoxide. Therefore, it is necessary to get a good roasting effect to lower the sulfuric......
