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Effect of mechanical activation on thiosulfate leaching of gold from complex sulfide concentrate Mohsen HASHEMZADEHFINI1, Jana FICERIOV?2, Emad ABKHOSHK3, Behrouz Karimi SHAHRAKI1 1. Iran Mineral... was investigated. The effects of milling time, ball size, sample to ball ratio and milling speed on thiosulfate leaching were studied. Under optimum conditions of milling time 1 h, ball size 20 mm, sample......
Role of oxygen and ammonium ions in silver leaching with thiosulfate–ammonia–cupric ionsValentin Ibarra-Galvan1,Alejandro López-Valdivieso2,Xiong Tong3,Yi-Qi Cui31. Faculty of Chemistry, Colima... and oxygen concentrations in the aqueous solution. Leaching silver with 4 mg L-1oxygen in the aqueous solution requires high concentration of ammonium and thiosulfate ions. High silver dissolution......
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alkaline leaching(IAL), thiosulfate leaching and cementation by zinc powder. The experimental results show that the grinding-leaching and intensified alkaline leaching process result in the selective..., the gold leaching rate by thiosulfate leaching for 24h is increased to 91.7% from 0-3.2% by ultra-fine grinding without the pretreatment. The recovery of gold by zinc cementation gets to 99.6%. Due......
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): 249-256. [17] Schippers A, Sand W. Bacterial leaching of metal sulfides proceeds by two indirect mechanisms via thiosulfate or via polysulfides and sulfur [J]. Appl Environ Microbiol, 1999, 65(6... Microbial leaching of marmatite by Acidithiobacillus ferrooxidans and Acidithiobacillus thiooxidans WANG Jun(王 军), QIU Guan-zhou(邱冠周), QIN Wen-qing(覃文庆), ZHANG Yan-sheng(张雁生) School......
Biooxidation-thiosulfate leaching of refractory gold concentrateHe-fei Zhao1,2,Hong-ying Yang1,2,Lin-lin Tong1,2,Qin Zhang1,2,Ye Kong1,21. Key Laboratory for Ecological Metallurgy of Multimetallic.... The results showed that the optimal reagent conditions were 0.18 M thiosulfate, 0.02 M copper(II), 1.0 M ammonia, and 0.24 M sulfite. Under these conditions, a maximum gold leaching efficiency......