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Bio-oxidation of arsenopyrite JIANG Tao(姜 涛), LI Qian(李 骞), YANG Yong-bin(杨永斌), LI Guang-hui(李光辉), QIU Guan-zhou(邱冠周) School of Minerals Processing and Bioengineering, Central South University.... The best bio-oxidation technical parameters are the initial pH of 1.8-2.0, particle sizes less than 0.074 mm, temperature in the range of 25-30 ℃ and rotating speed of the orbital incubator of 100-160......
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J. Cent. South Univ. (2020) 27: 1416-1423 DOI: https://doi.org/10.1007/s11771-020-4377-z Well-controlled stirring tank leaching to improve bio-oxidation efficiency of a high sulfur refractory gold... refractory gold concentrate with 41.82% sulfur and 15.12 g/t gold, of which 82.11% was wrapped in sulfide, a well-controlled stirring tank leaching was carried out to improve the bio-oxidation......
XPS characteristics of sulfur of bio-oxidized arsenic-bearing gold concentrate and changes of surface nature of bio-oxidation residue YANG Hong-ying(杨洪英), GONG En-pu(巩恩普), YANG Li(杨 立), CHEN Gang(陈 刚), FAN You-jing(范有静), ZHAO Yu-shan(张玉山), Lǚ Jiu-ji(吕久吉) (School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China) Abstract: During bio-oxidation of sulfides......
生物氧化预处理工艺控制系统研究与应用高丙朋1,南新元1(1.新疆维吾尔自治区乌鲁木齐市新疆大学电气工程学院)摘 要:通过对生物氧化预处理工艺中所选用菌种及主要参数的研究,得出生物氧化预处理控制系统中的优化工艺参数组合,并在实际生产过程中得以应用,取得良好的控制效果,提金率得到了明显的提高,为稳定生产提供了技术保障.关键词:金; 生物氧化; 监控; RS-485总线......
independent sub-processes. The first stage is the dissolution of chalcopyrite to produce Cu2+, Fe2+ and sulfur, and the second stage is bio-oxidation of sulfur, which is the control step..., and bacterial oxidation of elemental sulfur and zinc sulfide. To clarify the role and mechanism of A. ferrooxidans in bio-electro-generative simultaneous leaching, a comparative experiment was made......
Trans. Nonferrous Met. Soc. China 26(2016) 2479-2484 Enhancement of bio-oxidation of refractory arsenopyritic gold ore by adding pyrolusite in bioleaching system Xu ZHANG1,2, Ya-li FENG1, Hao-ran LI2... Engineering, Chinese Academy of Sciences, Beijing 100190, China Received 28 August 2015; accepted 14 June 2016 Abstract: Pyrolusite was added in the bioleaching process to enhance the bio-oxidation process......
by A. ferrooxidans in the further procedure. Key words: pyrite; MnO2; bio-oxidation; simultaneous leaching; electro-generation  ..., the study has been done on the electro-generatively simultaneous leaching(EGSL) of MnO2 and sulfide minerals[11-13]. It is well known that chemical energy releases as heat in the oxidation leaching......
,难处理含硫金精矿生物预氧化效果可望得到有效强化. 关键词:生物预氧化;难处理含硫金精矿;微生物群落;化学条件控制;两步氧化法 中图分类号:Q939 文献标志码:A Approaches to intensify bio-oxidation... of gold makes it essential to recover gold from refractory gold-bearing sulfide concentrates. Bio-oxidation method of refractory gold-bearing concentrates is a promising technology, but the widely......
on the surface of the sulfides can be oxidized by A. ferrooxidans after bio-electro-generative leaching for 24 h, and the transferred charge due to the bacterial oxidation is up to 17.86%, which is an important part of the output electric quantity. Key words: sphalerite mineral; electro-generative leaching; bio-oxidation; activation energy  ......