Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9633044 | International Journal of Mineral Processing | 2005 | 10 Pages |
Abstract
Bioleaching of marmatite flotation concentrate by the adapted strains of Acidithiobacillus ferrooxidans and Leptospirillum ferrooxidans in mixed cultures was carried out at initial pH of 2.0, temperature of 35 °C, particle size of â42 μm (over 90%), pulp density of 15% and air flow of 500 L minâ1 in a 10-L air-lift reactor. Experimental results showed that the addition of Fe2+ ion was favorable to improving the growth and activity of leaching bacteria and increasing the dissolution rate of marmatite. In the leaching system with Fe2+ ions added, the weight loss of the concentrate was over 70%, the leaching ratio of zinc was over 80% and the concentration of zinc ions in the leach liquor was about 50 g Lâ1 after 10 days of bioleaching. The technological feasibility of a microbiological process using the adapted strains of Acidithiobacillus ferrooxidans and Leptospirillum ferrooxidans in mixed cultures for extracting zinc from a marmatite flotation concentrate has been demonstrated.
Keywords
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Chemical Engineering (General)
Authors
Shaoyuan Shi, Zhaoheng Fang,