工程科学学报2017，Vol.39Issue(10)：1498-1506,9.DOI:10.13374/j.issn2095-9389.2017.10.006;
次生硫化铜矿微生物浸出实验
Secondary copper sulfide bioleaching experiments
摘要
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 Prov-ince. 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 con-centration, 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.关键词
次生硫化铜矿/嗜酸氧化亚铁硫杆菌/摇瓶/柱浸/铜浸出率Key words
secondary copper sulfide/acidthiobacillus ferrooxidans/shake flash/column leaching/copper extraction rate分类
矿业与冶金引用本文复制引用
尹升华,王雷鸣,潘晨阳,陈勋,谢芳芳,艾纯明..次生硫化铜矿微生物浸出实验[J].工程科学学报,2017,39(10):1498-1506,9.基金项目
国家自然科学基金资助项目(51374035, 51574013, 51604138) （51374035, 51574013, 51604138）
新世纪优秀人才支持计划资助项目(NCET- 13- 0669) （NCET- 13- 0669）
全国优秀博士学位论文作者专项资金资助项目(201351) （201351）
