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Effect of mixed moderately thermophilic adaptation on leachability and mechanism of high arsenic gold concentrate in an airlift bioreactorYU Run-lan(余润兰), WU Fa-deng(吴发登), CHEN An(陈安), SHI Li-juan(石丽... residue. Jarosite passivation and lower sulfur-oxidizing activity of the cells due to the toxicity of the high concentrations of soluble arsenic and iron ions at low pH value should mainly response......
gold ore with high arsenic concentration has two impending problems to be solved, i.e. improving bacterial leaching efficiency and shortening oxidation period. Arsenic is the most influential compound... of the high arsenic refractory gold ore. 2 Materials and experimental 2.1 Materials Bacteria HQ-0211 used by test, which are mixed with leaching bacteria dominated by Thiobacillus ferrooxidans......
efficiency of a high sulfur refractory gold concentrate [J]. Journal of Central South University, 2020, 27(5): 1416-1423. DOI: https://doi.org/10.1007/s11771-020-4377-z. 1 Introduction Gold ores are mainly.... 2008.05.001. [17] WANG Guo-hua, XIE Shui-bo, LIU Xin-xing, WU Yong-hong, LIU Ying-jiu, ZENG Tao-tao. Bio-oxidation of a high-sulfur and high-arsenic refractory gold concentrate using a two-stage process [J......
；浸金；除铁Pretreatment by sulfuric acid-curing of calcine roasting for gold ores with high sulfur and arsenic contentsYANG Yong-bin,ZENG Guan-wu,LI Qian,LIU Xiao-liang,JIANG Tao,LIU Bo(School of Minerals... iron in calcine is reduced to 7.23% after a pretreatment of sulfuric acid content 75%,excess coefficient of sulfuric acid 1.4,curing temperature 250 ℃ and curing time 1 h.Key words:gold ores with high......
264006, China) Abstract: Through blending low arsenic carbonate gold concentrate with different ratios into high arsenic-containing gold concentrate and changing the content of major ores, such as sulfur, arsenic and iron, the effect of iron-arsenic molar ratio on the bacteria oxidating-cyaniding extraction from high arsenic-containing refractory gold concentrate was investigated. The result......
High level arsenic resistance in bacteria present in biooxidation tanks used to treat gold-bearing arsenopyrite concentrates: A review D. E. RAWLINGS Department of Microbiology... gold-bearing arsenopyrite concentrates became adapted to high concentrations of arsenic over a number of years. The dominant microorganisms, Acidithiobacillus caldus and Leptospirillum ferriphilum......
% and 42.122% after one year, and the gold leaching extent was 80.40%. The arsenic and sulfur oxidation extents, and gold leaching extent were all linearly correlated. It is more reliable to predict gold... are enclosed [9]. Therefore, the gold leaching extent should be closely related to the oxidation extents of arsenic and sulfur. Heap biooxidation is usually carried out in a large scale in an open air......
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% and 99.79%, respectively. These results promise industrial application of DLP roasting.Key words:sulfur and arsenic-bearing gold ores; double-layered pellets; pelletizing; gold ores; pretreatment...Novel technology on preparation of double-layered pellets for sulfur and arsenic-bearing gold concentratesYANG Yong-bin(杨永斌), CUI Li-na(崔丽娜), LI Xi-shan(李希山), LI Qian(李骞), JIANG Tao(姜涛), GE Jie(戈捷......
] PAKTUNC D, FOSTER A, HEALD S, LAFLAMME G. Speciation and characterization of arsenic in gold ores and cyanidation tailings using X-ray absorption spectroscopy [J]. Geochimica et Cosmochimica Acta... Synchrotron Radiation Facility (BSRF), Institute of High Energy Physics (IHEP), Chinese Academy of Sciences. Sulfur K-edge spectra were obtained on a double-crystal monochromator (DCM) covering energy......
