Secondary copper sulfide bioleaching experiments

YIN Sheng-hua; WANG Lei-ming; PAN Chen-yang; CHEN Xun; XIE Fang-fang; AI Chun-ming

doi:10.13374/j.issn2095-9389.2017.10.006

Volume 39 Issue 10

Oct. 2017

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YIN Sheng-hua, WANG Lei-ming, PAN Chen-yang, CHEN Xun, XIE Fang-fang, AI Chun-ming. Secondary copper sulfide bioleaching experiments[J]. Chinese Journal of Engineering, 2017, 39(10): 1498-1506. doi: 10.13374/j.issn2095-9389.2017.10.006

Citation:

YIN Sheng-hua, WANG Lei-ming, PAN Chen-yang, CHEN Xun, XIE Fang-fang, AI Chun-ming. Secondary copper sulfide bioleaching experiments[J]. Chinese Journal of Engineering, 2017, 39(10): 1498-1506. doi: 10.13374/j.issn2095-9389.2017.10.006

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Secondary copper sulfide bioleaching experiments

doi: 10.13374/j.issn2095-9389.2017.10.006

YIN Sheng-hua^1,2,3,
WANG Lei-ming^{1,2,3
,
,},
PAN Chen-yang^1,2,
CHEN Xun^1,2,3,
XIE Fang-fang²,
AI Chun-ming⁴

1) School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, China
2) Key Laboratory of Ministry of Education for High-Efficient Mining and Safety of Metal, University of Science and Technology Beijing, Beijing 100083, China
3) Beijing JCHX Mine Technology Research Institute Co. Ltd, Beijing 101500, China
4) College of Safety Science and Engineering, Liaoning Technical University, Huludao 125105, China

Received Date: 2016-03-26

Abstract

Abstract

Bioleaching is one of the most effective methods of extracting valuable elements from low-grade, refractory secondary copper sulfide. In this research, Acidithiobacillus ferrooxidans was used to leach refractory secondary copper sulfide from Fujian Province. The bioleaching microorganisms were added to the culture, domesticated, and column leaching experiments. These were based on different particle size ratios and carried out sequentially. Based on this experiments, the evolution disciplinarians of bacterial concentration, pH values and copper extraction rates were obtained at different stages. Using computed tomography (CT) technology, ore heap slumping inside the columns, cross section porosity evolution and leaching mechanisms were studied. The results indicate that bacterial concentration and pH values present trends that increase first and then stabilize. The proliferation of bacteria in the leaching columns is slower and the bacterial concentration is only 5×10⁷ per mL after 480 h. During the leaching process, fine particles tend to move to the bottom of columns and the ore heap slump phenomenon appears. On the top surface of the column the porosity tends to be greater with increase rate of 6.65%, conversely, this tends to be smaller at the column bottom, and its decreases rate is 8.29%. The slump degree is proportional to the fines content; the minimum slump is 1.7 mm and the maximum 6.15 mm. Ore particle size is the key factor in the leaching process; column B (with particle size r < 1 mm accounted for 28.41% of whole ores quality) shows the best copper extraction rate of 47.23% after 480 h.
- secondary copper sulfide,
- acidthiobacillus ferrooxidans,
- shake flash,
- column leaching,
- copper extraction rate

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References(19)

References

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