Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报

ZHONGGUO YOUSEJINSHU XUEBAO

第25卷    第8期    总第197期    2015年8月

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文章编号:1004-0609(2015)08-2218-08
难处理含硫金精矿生物预氧化方法的强化工艺
刘新星1, 2,王国华1, 2,谢建平1, 2,李寿朋1, 2,郭玉洁1, 2,潘昊旻1, 2

(1. 中南大学 资源加工与生物工程学院,长沙 410083;
2. 中南大学 生物冶金教育部重点实验室,长沙410083
)

摘 要: 难处理含硫金精矿的生物预氧化方法前景广阔,但是由于生物预氧化反应速度慢、氧化周期长等因素的存在,严重影响该法在实际应用中的推广。因此,研究生物预氧化技术的强化方法已成为推动该技术发展的关键因素。为达到强化目的,总结了3个方面的强化策略:首先,分析了微生物群落的组成优化,通过组合氧化能力更强的微生物群落来达到强化目的;其次,控制溶液的化学条件,以保证微生物的代谢和功能发挥;最后,对预氧化工艺进行改进,构建更高效的生化反应条件。通过这些方法,难处理含硫金精矿生物预氧化效果可望得到有效强化。

 

关键字: 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

Approaches to intensify bio-oxidation of refractory gold-bearing sulfide concentrates
LIU Xin-xing1, 2, WANG Guo-hua1, 2, XIE Jian-ping1, 2, LI Shou-peng1, 2, GUO Yu-jie1, 2, PAN Hao-min1, 2

1. School of Mineral Processing and Bioengineering, Central South University, Changsha 410083, China;
2. Key Laboratory of Biological Metallurgy, Ministry of Education, Central South University, Changsha 410083, China

Abstract:Growing demand 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 utilization of bio-oxidation in the gold pre-treatment industry is limited by the low reaction rate and long oxidation cycle. Therefore, the intensifying approaches become the key factor to improve this technology. To achieve the intensification goal, three strategies were summarized in this work. Firstly, optimization of the microbial community was analyzed with the purpose of constructing more promising mixed cultures. Secondly, the chemical conditions were controlled to enhance the metabolism and function of the microorganisms. Thirdly, new processing approaches were improved to create more favorable conditions for biological and chemical reactions. When the bio-oxidation process is subjected to these strengthening strategies, the bio-oxidation efficiency will be elevated significantly.

 

Key words: bio-oxidation; refractory gold-bearing sulfide concentrate; microbial community; chemical condition control; two-step oxidation approach

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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