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Phase distribution identification in the column leaching ...

2.1 Leaching column Low grade copper ore was used in the experiments. It had an average composition of 2.95% Fe, 0.69% Cu and 2.02% S on a weight basis. The particle size distribution, measured by sieving, is given in Table 1. The ore (400 g) was agglomerated with 20 ml of 0.1 M sulfuric acid and packed into the column illustrated in Figure 1.

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Bioleaching: metal solubilization by microorganisms | FEMS ...

Abstract. Bioleaching is a simple and effective technology for metal extraction from low-grade ores and mineral concentrates. Metal recovery from sulfide minerals is based on the activity of chemolithotrophic bacteria, mainly Thiobacillus ferrooxidans and T. thiooxidans, which convert insoluble metal sulfides into soluble metal sulfates.Non-sulfide ores and minerals can be treated by ...

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Mesophilic and thermophilic bioleaching of copper from a ...

The through bioleaching would not only yield dissolved Cu for subsequent bioleaching of molybdenite has generally proven to be relatively slow recovery from the solution but it could also upgrade molybdenum con- and with low yields (Tributsch and Bennett, 1981; Kelley, 1986; centrate if the process is selective for copper.

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COLUMN BIOLEACHING OF A LOW-GRADE SILICATE ORE .

with 6-kg ore when column leaching was carried out at pH 1.7. The bioleaching of uranium from the low-grade ore of Turamdih may be correlated with the iron(II) and iron(III) concentrations, and redox potential values. Keywords: Acidithiobacillus ferrooxidans, bioleaching, column, ferric ions, uranium INTRODUCTION

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Column Bioleaching Experiment of Low Grade Uranium Ore ...

Great number of low grade uranium ore (U 0.03%) was stacked in the tailings dam as a waste rock in more than 50 years of exploitation, resulted in uranium resources waste. Two group column bioleaching experiments (column AB) were carried on in order to investigate uranium recovery effect by microbial for the low grade uranium ore.

  • Author: Jin Hui Liu, Ya Jie Liu, Zhi Hong Zheng, Xue Gang Wang, Yi Peng Zhou, Zhan Xue Sun, Wei Jun ShiGet Price
Bioleaching of low grade sulphide ore in column reactors

Bioleaching of low grade sulphide ore in column reactors Sadia Ilyas, Jae-chun Lee Korea Institute of Geoscience and Mineral Resources (KIGAM), Daejeon 305-350, KOREA Present work investigates the technical feasibility of bioleaching of metals such as Cu, Ni and Zn from a low grade sulphide ore with high contents of fayalite and hematite

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Column bioleaching of low grade copper ore by ...

This preview shows page 7 out of 7 pages.. Column bioleaching of low-grade copper ore by Acidithiobacillus ferrooxidans in pure and mixed cultures with a heterotrophic acidophile Acidiphilium Acidithiobacillus ferrooxidans in pure and mixed cultures with a heterotrophic acidophile Acidiphilium

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Silver catalyzed bioleaching of low-grade copper ores ...

Silver catalyzed bioleaching of low-grade copper ores. Part III: Column reactors J.A. Muñoza, D.B. Dreisingerb,⁎, W.C. Cooperb, S.K. Youngc a Departamento de Ciencia de los Materiales e Ingeniería Metalúrgica, Facultad de Ciencias Químicas, Universidad Complutense, 28015 Madrid, Spain b Department of Metals and Materials Engineering, The University of British Columbia, V6T 1Z2 .

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Well-controlled column bioleaching of a low-grade copper ...

For the low-grade copper sulfide ores with 0.99% of copper, of which 41.5% was primary copper sulfide, and 54.5% was secondary copper sulfide, well-controlled column bioleaching on a novel equipment was carried out to investigate the optimal conditions of pre-leaching, particle sizes of ores, temperature, spray intensity and strain consortium.

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Column Leaching of Greek Low-Grade Limonitic Laterites

potential of column leaching for the treatment of low-grade Greek limonitic laterite and also to assess the effect of the addition of Na2SO3 in the leaching solution on the overall efficiency of leaching. 2. Materials and Methods The ore used in this study (~50 kg) is a low .

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Bioleaching: metal solubilization by microorganisms | FEMS ...

Abstract. Bioleaching is a simple and effective technology for metal extraction from low-grade ores and mineral concentrates. Metal recovery from sulfide minerals is based on the activity of chemolithotrophic bacteria, mainly Thiobacillus ferrooxidans and T. thiooxidans, which convert insoluble metal sulfides into soluble metal sulfates.Non-sulfide ores and minerals can be treated by ...

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A Column Bioleaching Model for Chalcocite: An ...

2 A Column Bioleaching Model for Chalcocite: An Investigation of Oxygen Limitation and Bacterial Inoculation on Leaching Martin J. Leahy 1,2, Malcolm R. Davidson 1 and M. Philip Schwarz 2 1Department of Chemical and Biomolecular Engineering, The .

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Heap Bioleaching of Low-grade metal Sulphidic Ore .

The effect of low temperature on iron oxidation and mineral bioleaching was investigated. Microbial community development at different pH values and temperatures was tested in laboratory-scale bioleaching columns and finally the community dynamics .

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Column bioleaching of low-grade mining ore containing high ...

Sep 27, 2011 · Abstract. Present work describes the bioleaching potential of metals from low-grade mining ore containing smithsonite, sphaerocobaltite, azurite and talc as main gangue minerals with adapted consortium of Sulfobacillus thermosulfidooxidans strain-RDB and Thermoplasma acidophilum.Bioleaching potential improved markedly by added energy source, acid preleaching and .

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Column bioleaching of uranium embedded in granite porphyry ...

The performance of the consortium in column bioleaching of low-grade uranium embedded in granite porphyry was investigated. The influences of several chemical parameters on uranium extraction in column reactor were also investigated. A uranium recovery of 96.82% was achieved in 97days column leaching process including 33days acid pre-leaching ...

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BIOLEACHING OF URANIUM PDF - donovanbond

Jan 21, 2019 · Bioleaching of low-grade uranium ore using Acidithiobacillus ferrooxidans. Thus, the recovery of 4th is greater than that of 3rd column, and that of 3rd is greater than 2nd column and so on. A technology that has not been considered thus far is the tank bioleaching of uranium concentrates.

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A Column Bioleaching Model for Chalcocite: An ...

2 A Column Bioleaching Model for Chalcocite: An Investigation of Oxygen Limitation and Bacterial Inoculation on Leaching Martin J. Leahy 1,2, Malcolm R. Davidson 1 and M. Philip Schwarz 2 1Department of Chemical and Biomolecular Engineering, The .

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Bioleaching of Low-Grade Copper Sulfide Ore Using a Colum ...

Moreover, bioleaching of the low-grade ore (53-75 μm particles) yielded 55% copper recovery after 20 days of operation in a column reactor. The good results for the copper bioleaching in the column reactor are very similar to those in the stirred reactor.

  • Author: Wen Qing Qin, Yan Sheng Zhang, Shi Jie Zhen, Jun Wang, Jian Wen Zhang, Guan Zhou QiuGet Price
Column bioleaching of low-grade copper ore by ...

Jan 01, 2013 · Read "Column bioleaching of low-grade copper ore by Acidithiobacillus ferrooxidans in pure and mixed cultures with a heterotrophic acidophile Acidiphilium sp., Hydrometallurgy" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.

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Insights into Ferric Leaching of Low Grade Metal Sulfide ...

We present an in situ analysis using X-ray computed tomography to quantify the rates of volume reduction of sulfide mineral grains in low grade agglomerated copper bearing ores during a miniature laboratory scale column leaching experiment.

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