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中南大学学报(英文版)

Journal of Central South University

Vol. 27    No. 5    May 2020

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Modeling heap biooxidation of arsenic-bearing gold ore
LI Jia-feng(李佳峰)1, ZHONG Shui-ping(衷水平)2, TONG Lin-lin(佟琳琳)1, ZHANG Deng-chao(张登超)3, BAO Dong-bin(鲍东斌)3, YANG Hong-ying(杨洪英)1

1. School of Metallurgy, Northeastern University, Shenyang 110819, China;
2. State Key Laboratory of Gold Extraction, Zijin Mining Group Co., Ltd., Shanghang 364200, China;
3. Xincheng Mining Co., Ltd., Guanhua Rare-precious Metals Group, Chizhou 247100, China

Abstract:To design heap biooxidation process, it is necessary to understand its internal rules. The heap biooxidation of gold ore from Anhui province was researched in this study. The results showed that the main microorganisms in the heap were A. ferrooxidans, F. acidiphilum and L. ferrodiazotrophum. Under their combined action, gold leaching extent rose from 35.62% to 78.08% in 80 d. Boltzmann model matches the actual oxidation effect better and the model equations were obtained. The model predicted that the oxidation extents of arsenic and sulfur are 58.577% 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 leaching extent by sulfur oxidation extent. These results provided good guidance for practical application in the actual production.

 

Key words: heap biooxidation; gold ore; microbial community; fitting; correlativity

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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