次生硫化銅礦微生物浸出實驗

尹升華; 王雷鳴; 潘晨陽; 陳勛; 謝芳芳; 艾純明

doi:10.13374/j.issn2095-9389.2017.10.006

次生硫化銅礦微生物浸出實驗

doi: 10.13374/j.issn2095-9389.2017.10.006

尹升華^1,2,3,
王雷鳴^1,2,3, ,,
潘晨陽^1,2,
陳勛^1,2,3,
謝芳芳²,
艾純明⁴

1) 北京科技大學土木與資源工程學院, 北京 100083
2) 北京科技大學金屬礦山高效開采與安全教育部重點實驗室, 北京 100083
3) 北京金誠信礦山技術研究院有限公司, 北京 101500
4) 遼寧工程技術大學安全科學與工程學院, 葫蘆島 125105

基金項目:

全國優秀博士學位論文作者專項資金資助項目(201351)

新世紀優秀人才支持計劃資助項目(NCET-13-0669)

國家自然科學基金資助項目(51374035,51574013,51604138)

詳細信息

中圖分類號: TD853.3
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- 被引次數: 0
出版歷程
- 收稿日期: 2016-03-26

Secondary copper sulfide bioleaching experiments

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

摘要

摘要: 微生物浸礦是提取低品位,難選次生硫化銅礦中有價元素的最有效方法之一.本研究利用嗜酸氧化亞鐵硫桿菌(Acidthiobacillus ferrooxidans)浸取福建某難選次生硫化銅礦,依次開展浸礦菌富集培養實驗、馴化轉代實驗和不同粒徑配比下柱浸試驗,獲得了不同階段的細菌濃度、pH值、銅浸出率等演變規律;并結合電子計算機斷層掃描技術實現了柱內礦堆塌落、截面孔隙演化和浸礦機理研究.研究表明:細菌濃度和pH值均呈現緩慢增加后趨降低的趨勢,浸柱中細菌增殖較慢,浸礦480 h后,細菌濃度僅為每毫升5×10⁷個.浸礦過程中,細顆粒趨于向柱底遷移,礦堆出現塌落;柱頂孔隙率變大,增幅為6.65%,柱底孔隙率變小,降幅為8.29%;塌落程度與細粒含量成正比,最小塌落為1.7 mm,最大塌落為6.15 mm.入堆礦石粒徑極大影響著柱浸體系的浸出效果.實驗中柱浸B組(粒徑r < 1 mm占28.41%)浸礦效果最佳,浸礦480 h后銅浸出率達47.23%.
- 次生硫化銅礦 /
- 嗜酸氧化亞鐵硫桿菌 /
- 搖瓶 /
- 柱浸 /
- 銅浸出率
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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參考文獻(19)

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