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of sulfuric acid concentrations on leaching rate of tungsten 图13 不同硫酸浓度下黑钨矿浸出过程中- 关系图 Fig. 13 Plots of vs of wolframite during leaching at different sulfuric acid concentrations...: 291-311. LI Hong-gui. Metallurgical principle[M]. Beijing: Science Press, 2005: 291-311. Leaching kinetics of wolframite with sulfuric-phosphoric acid YANG Kai-hua, ZHANG Wen-juan, HE Li-hua, LI Yong-li......
and there is no silica gel produced. The experiments can be repeated well. Key words: Cu-Co white alloy; oxidative leaching; leaching recovery; oxidant; sulfuric acid; hydrochloric acid ...; Effect of mole ratio of sulfuric acid to hydrochloric on leaching recovery 从图3可见,在盐酸含量较高时,2种酸的配比对浸出率的影响不显著,随着硫酸比例的加大和氯离子含量的减少,浸出率呈降低的趋势.当硫酸与盐酸摩尔比从6?4增至9?1时,金属阳离子以 [Cu(Cl)4]2-,[Co(Cl)4]2-和[Fe(Cl)4]2-的形......
conditions of a concentration of sulfuric acid 50%,the sulfuric acid dosage coefficient 1.2,leaching temperature 105 ℃ and leaching time 3 h. The leaching rate of Fe is 93.66%. The leaching rate of Au... tailings decreases by 38.8% after reduction roasting,sulfuric acid leaching,oxidizing roasting and cyanide leaching.Key words:cyanide tailings; reduction roasting; sulfuric acid leaching; cyanide process......
文献标志码:A Removal of Fe3+ from iron rich and high acidity sulfuric acid leaching liquid by extraction of N235 ZHANG Kui-fang, LIU Zhi-qiang, CAO Hong-yang, QIU Xian-yang (Guangdong... based on the technology gap on the removal of Fe3+ from iron rich and high acidity sulfuric acid leaching liquid by extraction. The effects of H2O2 dosage, feed initial pH, extractant concentration......
, 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... residue show that the main phases of U-Mo ore endured sulfuric acid roasting and water leaching change from aluminosilicate and SiO2 in raw ore to SiO2 in leached residue. Key words: U-Mo ore; sulfuric......
, 8]. Sulfuric acid is usually employed to adjust the pH value of COPR during the hydro-remediation process. Although the sulfuric acid favors the leaching of Cr(VI) in CAC and hydrotalcite [9-10... of nickel leaching from roasting-dissolving residue of spent catalyst with sulfuric acid [J]. Journal of Central South University of Technology, 2009, 16(3): 410-415. [22] SUN Hui-lan, YU Hai-yan, WANG......
, et al. Study on process and kinetics of extracting copper from complex high silicon white alloy by sulfuric acid oxidation leaching[J]. The Chinese Journal of Nonferrous Metals, 2021, 31(5...5 mL的次氯酸钠(Cl-的摩尔数相等)对铜钴浸出率的影响,结果如图3所示. 图2 高硅白合金硫酸氧化浸出的流程图 Fig. 2 Flow chart of sulfuric acid oxidation leaching of high silicon white alloy 图3 不同氧化剂对铜和钴浸出率的影响 Fig. 3 Effect......
roasting-sulfuric acid leaching-solvent extraction was investigated. The residue was characterized by microscopic investigations, using X-ray fluorescence spectrometry (XRF) and X-ray diffractometry (XRD...) to the residue, segregation roasting time and temperature, sulfuric acid concentration, liquid-to-solid ratio, leaching time, leaching temperature, addition amount of 30% H2O2, stirring speed (a constant......
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