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Mechanism of electro-generating leaching of chalcopyrite-MnO2 in presence of Acidithiobacillus thiooxidans XIAO Li(肖 利)1, 2, LIU Jian-she(柳建设)3, FANG Zheng(方 正)1, QIU Guan-zhou(邱冠周)4 1. School... minerals in the electro-generating leaching(EGL) and the bio-electro-generating leaching(BEGL), respectively. The results showed that the dissolution rates for Cu2+ and Fe2+ in BEGL were almost 2 times......
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Trans. Nonferrous Met. Soc. China 22(2012) 1753-1759 Extraction of lithium from lepidolite using chlorination roasting-water leaching process YAN Qun-xuan, LI Xin-hai, WANG Zhi-xing, WANG Jie-xi...: Chlorination roasting followed by water leaching process was used to extract lithium from lepidolite. The microstructure of the lepidolite and roasted materials were characterized by X-ray......
river sand as aggregate, cement as binding agent and salt as useful component, and a laboratory leaching experiment was carried out with water as the leaching solution. Each of the samples was 50 mm... into a constant temperature of oven, still at 105 °C for 2 d. Lastly, after weighing was completed, each sample was put into purified water (550 mL), respectively, and the concentration of leaching solution......
J. Cent. South Univ. (2019) 26: 2328-2339 DOI: https://doi.org/10.1007/s11771-019-4177-5 Water leaching of arsenic trioxide from metallurgical dust with emphasis on its kinetics YANG Kang(杨康)1, LIU... and Environment, Central South University, Changsha 410083, China Central South University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2019 Abstract: Water leaching of As2O3 from......
into water-soluble and acid-soluble hexavalent chromium according to their solubility. The water-solubility hexavalent chromium consists of Na2CrO4 from the leaching and baking process. And acid-solubility... of two-step procedure, a fast leaching and a slow leaching. In the fast leaching procedure, Cr(Ⅵ) is rapidly released into leachate because of presence of water soluble substances in chromium......
. The reaction temperature was controlled by an isothermal water bath with a digital thermometer (within ±1 ℃). The reaction mixture was agitated at a fixed rate of 250 r/min. The effect of leaching time on metallic extraction was calculated by Eq.(6). At the end of leaching, the leached residue was ?ltered and washed with distilled water using a Büchner funnel. The leaching rates of metals (Ni, Co, etc......
Effect of mechanical activation on alkali leaching of chromite ore ZHANG Yang(张 洋)1, 2, ZHENG Shi-li(郑诗礼)1, DU Hao(杜 浩)1, XU Hong-bin(徐红彬)1, ZHANG Yi(张 懿)1 1. National Engineering Laboratory.... It is observed that the extraction ratio reaches 97% after leaching for 200 min when chromite ore is mechanically activated for 10 min, but only 34% if not activated. Mechanical activation can decrease......
- and pyro-metallurgy in the treatment of copper dust, i.e., copper dust is firstly leached by water or dilute sulfuric acid and then the leaching residues are sent to the pyrometallurgical deoxidizing... of the pressure leaching reaction, the autoclave was cooled immediately and depressurized. The slurry was then vacuum filtered, and the residue was washed by a small quantity of boiling water. The volumes......
="ChDivSummary" name="ChDivSummary">In this work,a two-step zircon method to produce zirconium oxychloride was introduced,and the alkali fusion technique with NaOH and water leaching process were... are not observed.The conditions of water leaching process were investigated as well,and the optimal conditions are as follows:liquid-solid ratio of 5:1,leaching time of 0.5 h,leaching temperature of 50......