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Effects of mechanical activation and oxidation-reduction on hydrochloric acid leaching of Panxi ilmenite concentration TAN Ping1, HU Hui-ping2, ZHANG Li2 1. Department of Biological and Chemical... November 2010; accepted 14 April 2011 Abstract: The effects of oxidation-reduction treatment and mechanical activation on the hydrochloric acid leaching performance of Panxi ilmenite concentration were......
. This enables to avoid tantalum and niobium losses with mother liquor. Table 5 demonstrates results of one of the experiments, and Figure 6 shows PMC leaching with fluoride-nitric acid. A high extraction... residue were determined. Fluoride-sulfuric acid and fluoride-nitric acid schemes were proposed for PMC leaching by an extractive separation of tantalum form niobium, lead and impurities, and production......
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... 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......
) 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... roasting temperature of 850 ℃, sulfuric acid concentration of 4.5 mol/L, liquid-to-solid ratio of 6:1, leaching time of 5 h, leaching temperature of 80 ℃, addition of 30% H2O2 of 0.6 mL for 1 g dry residue......
. The mass concentration of Fe3+ is below 0.1 g/L and its reduction rate is above 99.8%. Key words: waste Mn-Zn ferrite powders; sulfuric acid leached liquor; reduction 锰锌铁氧体是现代电子工业及信息产业的基础功能材料,随着通讯,计算机...+ in sulfuric acid leached liquor from waste Mn-Zn ferrite powders and the theoretical prescription of Mn-Zn ferrite, the sulfuric leached liquors’ proportion reduction processes, in which special proportion......
that when the agitation rate is above 600 r-min-1, its influence on indium leaching rate is insignificant. It is determined that the leaching rates increase with the increase in sulfuric acid concentration... Utilization of Multimetallic Mineral, Ministry of Education, Northeastern University摘 要:The kinetics of oxygen pressure acid leaching marmatite with high indium......
4.2 Dissolution of residues obtained from ZLR dissolution 4.2.1 Sulfuric acid leaching 1) Effects of acid concentration on germanium and iron dissolution As it is shown in Fig. 1, increasing... for this experiment. Table 7 Mass balance results for leaching filter cake dissolution under optimum condition Fig. 1 Effect of sulfuric acid concentration on germanium and iron yield (Temperature=85/°C......
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high silicon white alloy by sulfuric acid oxidation leaching, the activation energy, sulfuric acid concentration and particle size reaction order are 34.64 kJ/mol, 2.34 and 0.18, respectively..., 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......
) and particle size (<106 μm). The shrinking core model was applied to the results of experiments investigating the effects of leaching temperature in the range of 40-90 °C and nitric acid concentration... presented in Fig. 4 show that Ni extraction increases as acid concentration increases. Fig. 4 Effect of acid concentration on nickel extraction from lateritic ore The leaching experiments were carried......