sILveR oRE bIolEACHing

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

    2007-8-1 · Copper extraction from the K-ore surpassed 70% after 350 days of bioleaching using low concentrations of silver (1.4 g Ag/kg Cu). The addition of silver was effective even after the bioleaching process was started. Conversely, silver addition mode and aeration were not significant variables in the bioleaching process.

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

    2007-8-1 · The copper dissolution in the silver-catalyzed lower K-ore bioleaching is temperature dependent, with an optimum temperature around 35 °C. The activation energies of the copper dissolution process were 109.7 and 20 kJ/mol in the ranges of temperature between 15 and 28 °C and 28 and 45 °C respectively.

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

    2007-8-1 · The bioleaching of the low-grade copper ore requires a minimum amount of nutrient salts to obtain the maximum efficiency.An increase of ferric ion concentration negatively affects the silver-catalyzed bioleaching but the effect is markedly positive on the silver-catalyzed chemical leaching of the low-grade ore tested.

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

    The copper dissolution in the silver-catalyzed lower K-ore bioleaching is temperature dependent, with an optimum temperature around 35 °C. The activation energies of the copper dissolution ...

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

    2008-9-26 · A study of the effect of different variables (inoculation, pulp density, [Ag], nutrient medium, pH and [Fe3+]) on the silver-catalyzed bioleaching of a low-grade copper sulfide ore has been carried out in shake flasks. Chalcopyrite was the dominant copper mineral in the ore.

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  • Selective and non-selective bioleaching of manganese

    1989-3-1 · Batch culture experiments showed that manganese could be leached from a manganese-containing silver ore by bacterial strain SSW22, by a mixed culture

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  • Catalytic effect of silver on copper release from ...

    2020-6-15 · Although silver ion has been found to be effective in improving the bioleaching rate of many minerals, biohydrometallurgy studies using silver ion as catalyst have mainly focused on copper-containing minerals such as chalcopyrite (Abdollahi et al., 2015). The catalytic mechanism of silver ion on bioleaching of chalcopyrite is complex and still ...

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  • Bacterial and chemical leaching of copper-containing ores ...

    2019-1-25 · Column bioleaching tests showed an 82.3% yield of copper after 70 days of the experiment and a 70% of silver, whereas for chemical leaching the yield of copper is 66.8% and silver is 51%. In conclusion, this investigation demonstrated higher extraction for both copper and silver from the primary ore in the bioleaching sample compared to the ...

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  • Silver recovery - MINING.COM

    Leaching of a high grade gold/silver ore with the CELP resulted in higher silver and gold extractions while using a lower cyanide concentration. ... Improving Heap Bioleaching –

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  • Metals Extraction from Sulfide Ores with Microorganisms ...

    2019-1-2 · During bench-scale bioleaching experiment, ore was inoculated with Halothiobacillus halophilus and supplemented with formate (0.3%) that enhanced the nickel recovery to 70-fold . Chaerun et al. [ 30 ] processed low-grade nickel limonite and saprolite ores by using mixotrophic bacterial consortia and achieved 30% and 2.5% of nickel from limonite ...

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

    2007-8-1 · The copper dissolution in the silver-catalyzed lower K-ore bioleaching is temperature dependent, with an optimum temperature around 35 °C. The activation energies of the copper dissolution process were 109.7 and 20 kJ/mol in the ranges of temperature between 15 and 28 °C and 28 and 45 °C respectively.

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

    The copper dissolution in the silver-catalyzed lower K-ore bioleaching is temperature dependent, with an optimum temperature around 35 °C. The activation energies of the copper dissolution ...

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

    2008-9-26 · A study of the effect of different variables (inoculation, pulp density, [Ag], nutrient medium, pH and [Fe3+]) on the silver-catalyzed bioleaching of a low-grade copper sulfide ore has been carried out in shake flasks. Chalcopyrite was the dominant copper mineral in the ore.

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  • Chalcopyrite bioleaching catalyzed by silver | Request PDF

    The copper dissolution in the silver-catalyzed lower K-ore bioleaching is temperature dependent, with an optimum temperature around 35 °C. The activation energies of the copper dissolution ...

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  • Aerobic processes for bioleaching manganese and silver ...

    Aerobic processes for bioleaching manganese and silver using microorganisms indigenous to mine tailings World J Microbiol Biotechnol . 2020 Jul

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  • Catalytic Effect of a Combined Silver and Surfactant ...

    2018-9-24 · The effects of Ag+, surfactants, and their combination on cobalt ore bioleaching were investigated in this article. Ag+ ions and surfactants, either individually or in combination, can significantly accelerate mineral dissolution and increase metal leaching efficiencies. When 20 mg L−1 Ag+ was added, the cobalt and copper leaching efficiencies increased from 67.8% and

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  • Silver recovery - MINING.COM

    Leaching of a high grade gold/silver ore with the CELP resulted in higher silver and gold extractions while using a lower cyanide concentration. ... Improving Heap Bioleaching –

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  • Bacterial and chemical leaching of copper-containing ores ...

    2019-1-25 · Column bioleaching tests showed an 82.3% yield of copper after 70 days of the experiment and a 70% of silver, whereas for chemical leaching the yield of copper is 66.8% and silver is 51%. In conclusion, this investigation demonstrated higher extraction for both copper and silver from the primary ore in the bioleaching sample compared to the ...

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  • 永平低品位黄铜矿矿石细菌浸出的银离子催化效应-【维普期刊 ...

    In order to improve the bioleaching effect of low - grade chalcopyrite ore from Yongping Copper Mine using mixed thiobacillus ferrooxidans and thiobacillus thiooxidans, the cata- lytic effect of silver ion added in the solution on the bioleaching of the chalcopyrite ore

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  • Metals Extraction from Sulfide Ores with Microorganisms ...

    2019-1-2 · During bench-scale bioleaching experiment, ore was inoculated with Halothiobacillus halophilus and supplemented with formate (0.3%) that enhanced the nickel recovery to 70-fold . Chaerun et al. [ 30 ] processed low-grade nickel limonite and saprolite ores by using mixotrophic bacterial consortia and achieved 30% and 2.5% of nickel from limonite ...

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  • Chalcopyrite bioleaching catalyzed by silver | Request PDF

    The copper dissolution in the silver-catalyzed lower K-ore bioleaching is temperature dependent, with an optimum temperature around 35 °C. The activation energies of the copper dissolution ...

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

    2008-9-26 · A study of the effect of different variables (inoculation, pulp density, [Ag], nutrient medium, pH and [Fe3+]) on the silver-catalyzed bioleaching of a low-grade copper sulfide ore has been carried out in shake flasks. Chalcopyrite was the dominant copper mineral in the ore.

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  • Catalytic Effect of a Combined Silver and Surfactant ...

    2018-9-24 · The effects of Ag+, surfactants, and their combination on cobalt ore bioleaching were investigated in this article. Ag+ ions and surfactants, either individually or in combination, can significantly accelerate mineral dissolution and increase metal leaching efficiencies. When 20 mg L−1 Ag+ was added, the cobalt and copper leaching efficiencies increased from 67.8% and

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  • Aerobic processes for bioleaching manganese and silver ...

    2020-7-21 · Treatment of the insoluble residue by cyanidation showed that the solubilization of silver was 53%.The study of Núñez Ramírez et al. describes the use of an acidophilic bacteria for bioleaching of silver-manganese minerals; it was observed a manganese dissolution level of 20–23% after 36–48 h. This process was combined with the use of a ...

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  • Silver recovery - MINING.COM

    Leaching of a high grade gold/silver ore with the CELP resulted in higher silver and gold extractions while using a lower cyanide concentration. ... Improving Heap Bioleaching –

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  • Bacterial and chemical leaching of copper-containing ores ...

    2019-1-25 · Column bioleaching tests showed an 82.3% yield of copper after 70 days of the experiment and a 70% of silver, whereas for chemical leaching the yield of copper is 66.8% and silver is 51%. In conclusion, this investigation demonstrated higher extraction for both copper and silver from the primary ore in the bioleaching sample compared to the ...

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  • Progress, Challenges, and Perspectives of Bioleaching for ...

    2021-5-7 · Gold, silver, lead, zinc, sulphur, indium, gallium, cadmium, germanium, selenium, tellurium, and other associated elements recovered from Chinese copper ore during the processing and smelting process account for 44% of the total

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  • (PDF) Cyanide Leaching of Copper-Gold-Silver Ores

    Copper is produced in acid leaching in t he form of. cathodes, while the copper produced by cyanide leaching is in form of a sulphide precipitate. having 65% copper. Cyanide leaching pr oduces ...

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  • Ali Behrad Vakylabad's lab | Kerman Graduate University of ...

    Silver catalyst in action. ... as jarosite could limit the bioleaching of copper and significantly lower the dissolution rate of low-grade chalcopyrite ore. Thus, to improve the rate through ...

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  • 第27卷/第5期/2020年5月 - 中南大学学报(自然科学版、英文

    Bioleaching of low-grade copper sulfide ore by extremely thermoacidophilic consortia at 70 °C in column reactors AI Chen-bing(艾郴兵), LIANG Yu-ting(梁昱婷), QIU Guan-zhou(邱冠周), ZENG Wei-min(曾伟民) 1404 Well-controlled stirring tank leaching to improve

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