copper leaching bacterial
BACTERIAL LEACHING OF COPPER FROM LOW GRADE
Bacterial leaching TABLE III Results of the laboratory trial in leaching out copper jroln a sample of cha/c.o .. pyrite ore available at Ingladhal . . .. The amount of the ore taken 40 los The size of the ore (CuFeSs containing O· 6 per cent eu) ! inch The volume of the leach liquor (pH 5), i.e. the medium without
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Bacterial heap-leaching: Practice in Zijinshan copper mine ...
2006-9-1 · Zijinshan copper mine is the largest chalcocite deposit in China. The attempt to recover copper from the ore by bioleaching began at the end of 1998. Following the metallurgical studies carried out over 2 years, a pilot plant consisting of bio-heap leaching and SX–EW was built at the Zijinshan Copper Mine at the end of 2000, with a production ...
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Recovery of copper by dump leaching with use of bacteria ...
Observations on the microflora in an industrial copper dump leaching operation. S.N. Groudev, P.N. Genchev and S.S. Gaidarjiev. In: Metallurgical applications of bacterial leaching and related microbiological phenomena. New York: Academic Press, 1978, p. 253–274. Google Scholar
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(PDF) Bacterial leaching of black shale copper ore
A sulphide ore from the Zlata deposit, containing 0.32 % copper, 4.2 g/t gold and 9.1 g/t silver, initially was subjected to bacterial leaching in percolation columns by means of acidophilic ...
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Bacterial leaching of zinc and copper from mining wastes ...
1995-2-1 · Bacterial leaching of zinc from chat (chert) pile rock and copper from tailings pond sediment was studied in shake flask experiments. Thiobacillus ferrooxidans at 26°C leached 38% of zinc from pulverized rock in 15 days and extracted copper completely from native sediment in 24 h. Experiments omitting single medium constituents for the bacterial leaching of both zinc
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[Leaching of copper ore of the Udokanskoe deposit at low ...
Regimes of bacterial-chemical leaching of ore have been studied over a temperature range from -10 to +20 degrees C. Effects of pH, temperature, and the presence of microorganisms on the extraction of copper have been shown. Bacterial leaching has been detected only at positive values of temperature, and has been much more active at +20 than at ...
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A BACTERIAL HEAP LEACHING APPROACH FOR THE
2009-8-26 · leaching and bacterial leaching. There are currently no heap leach operations processing primary (chalcopyrite) copper sulphides. 80% of world copper resources consists of low grade chalcopyrite, where the grade is too low to concentrate and which cannot be economically processed in any way other than heap leaching. Mintek is currently ...
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Bacterial Leaching of Minerals | SpringerLink
Berry, V.K, (1978) Direct observations of bacteria and quantitative studies of their catalytic role in the leaching of low-grade, copper-bearing waste. Metallurgical Applications of Bacterial Leaching and Related Microbiological Phenomena. Lawrence E. M., A. E. Torma and J. A. Brierley (eds) New York. Academic, p. 103–136. Google Scholar
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Bacterial leaching of ores and other materials
2018-2-27 · In the U.S.A. 200,000 to 250,000 t of copper are produced annually by bacterial leaching, equivalent to 20 -25% of the total copper production. In the whole world about 5% of the total copper production is obtained by bacterial
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Gold & Copper Bioleaching - 911 Metallurgist
2015-2-28 · Bacterial Leaching of Copper Ores. Several types of bacteria capable of living in an acid environment have been isolated from copper mine waters.
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Bacterial heap-leaching: Practice in Zijinshan copper mine ...
2006-9-1 · Zijinshan copper mine is the largest chalcocite deposit in China. The attempt to recover copper from the ore by bioleaching began at the end of 1998. Following the metallurgical studies carried out over 2 years, a pilot plant consisting of bio-heap leaching and SX–EW was built at the Zijinshan Copper Mine at the end of 2000, with a production ...
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Bacterial Leaching of Kure Copper Ore | Request PDF
In this leaching process, using "Acidithiobacillus ferrooxidans" culture, bacteria count, pH, copper and iron recoveries are monitored during the 576 hours of test period. By increasing the solid ...
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Optimizing conditions for bacterial leaching of copper ...
The leaching time and ratio of bacteria concentration substrate and water could influence the leaching rate of copper, and the leaching rate of chalcopyrite
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[Leaching of copper ore of the Udokanskoe deposit at low ...
Regimes of bacterial-chemical leaching of ore have been studied over a temperature range from -10 to +20 degrees C. Effects of pH, temperature, and the presence of microorganisms on the extraction of copper have been shown. Bacterial leaching has been detected only at positive values of temperature, and has been much more active at +20 than at ...
Read More
Bacterial leaching of zinc and copper from mining wastes ...
1995-2-1 · Bacterial leaching of zinc from chat (chert) pile rock and copper from tailings pond sediment was studied in shake flask experiments. Thiobacillus ferrooxidans at 26°C leached 38% of zinc from pulverized rock in 15 days and extracted copper completely from native sediment in 24 h. Experiments omitting single medium constituents for the bacterial leaching of both zinc
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Bacterial Leaching of Minerals | Springer for Research ...
Berry, V.K, (1978) Direct observations of bacteria and quantitative studies of their catalytic role in the leaching of low-grade, copper-bearing waste. Metallurgical Applications of Bacterial Leaching and Related Microbiological Phenomena. Lawrence E. M., A. E. Torma and J. A. Brierley (eds) New York. Academic, p. 103–136. Google Scholar
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Bioleaching: metal solubilization by microorganisms |
1997-7-1 · Torma suggested that at that time up to 25% of the U.S. copper production was recovered by bacterial leaching . Meanwhile Chile is the world’s major copper producing country and even at 4200 m above sea level (Quebrada Blanca) bioleaching is being operated and will produce 75 000 tons of copper annually ( Fig. 6 ).
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Leaching of Chalcopyrite under Bacteria–Mineral Contact ...
Bacteria–mineral contact and noncontact leaching models coexist in the bioleaching process. In the present paper, dialysis bags were used to study the bioleaching process by separating the bacteria from the mineral, and the reasons for chalcopyrite surface passivation were discussed. The results show that the copper leaching efficiency of the bacteria–mineral contact model
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Microbial leaching - Online Biology Notes
2020-8-27 · Copper leaching plants have been in wide use throughout the world for many years, generally operated as simple heap leaching processes but sometimes as combinations of heap and in-situ leaching. The leaching solution (sulfate/Fe 3+ solution) carries the microbial nutrients in and the dissolved copper out.
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Bioleaching of Copper | SpringerLink
The application of the bioleaching reaction for copper has been exploited and used to develop suitable methods to recover copper from copper-bearing solutions. Keywords Copper Sulfide Leach Solution Copper Recovery Heap Leach Bacterial Leaching
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Bacterial leaching of copper from alkaline and neutral ...
The results of copper leaching from postflotation wastes with the use of bacteria and brown coal (as binding agent) are presented. The bacteria were isolated from postflotation wastes and classified by the numerical method. In the case of bacterial and brown coal leaching, 33% of copper was leached from sandstone and 71% from limestone type wastes.
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BACTERIAL LEACHING OF COPPER AND ZINC WITHOUT
Thiobacillus ferrooxidans and Thiobacillus thiooxidans play major roles in bacterial leaching of metals from ores and tailings through their oxidative action on ferrous iron (Fe 2+) and sulfide or sulfur (S 0).We have studied the effects of various inhibitors such as cyanide, azide and anions (phosphate, nitrate, chloride) on Fe 2+ or S 0 oxidation by resting cells, on Fe 2+ or S 0 as an ...
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Leaching of copper from Kupferschiefer by glutamic acid ...
2015-5-1 · Within the leaching period the highest copper content is achieved with pure glutamic acid (681.8 mg/l).The growth medium batch (331.3 mg/l) and the inoculated ones B12 and B5T (352.5 mg/l; 383.8 mg/l, respectively) occupy a narrow range whereas the leach results for the A12 batch was found to yield results higher than those obtained for other species (427.2 mg/l),
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Bacterial Leaching of Minerals | SpringerLink
Berry, V.K, (1978) Direct observations of bacteria and quantitative studies of their catalytic role in the leaching of low-grade, copper-bearing waste. Metallurgical Applications of Bacterial Leaching and Related Microbiological Phenomena. Lawrence E. M., A. E. Torma and J. A. Brierley (eds) New York. Academic, p. 103–136. Google Scholar
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Study on Recovery of Associated Copper Oxide Ore by ...
2019-11-30 · bacteria is the control link of the whole bacterial leaching process. Bacterial leaching is sometimes dominated by direct action and sometimes by indirect action. However, in the process of leaching, both functions exist simultaneously and cannot be excluded. 3. Factors Affecting Bacterial Leaching of Associated Copper Oxide Ore
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Leaching of Chalcopyrite under Bacteria–Mineral Contact ...
Bacteria–mineral contact and noncontact leaching models coexist in the bioleaching process. In the present paper, dialysis bags were used to study the bioleaching process by separating the bacteria from the mineral, and the reasons for chalcopyrite surface passivation were discussed. The results show that the copper leaching efficiency of the bacteria–mineral contact model
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Percolation bacterial leaching of low-grade chalcopyrite ...
2008-6-18 · ode copper was produced through bacterial leaching of agglomer-ated ore in heaps [4,5]. Renman et al. [6] described step by step pro-gress made in setting up and operating bacterial heap leaching facili-ties to produce 300 to 10,000t/year of cathode copper in the Zijins-han copper mine in China. In the bioleaching process, leaching studies
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16.6A: Microbial Ore Leaching - Biology LibreTexts
2021-1-3 · The electrons pass into the cells and are used in biochemical processes to produce energy for the bacteria while reducing oxygen to water. The critical reaction is the oxidation of sulfide by ferric iron. The main role of the bacterial
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Copper leaching from waste electric cables by ...
2015-3-4 · leaching systems, with a leaching duration of 1 day. The bacterial leaching system slightly outperformed the chemical one but the positive effect of regeneration of Fe3+ was limited. It appears that the Fe2+ bio-oxidation is not sufficiently optimised. Best results in terms of copper solubilisation kinetics were
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Recovery of copper values from bio-heap leaching of low ...
2010-2-5 · Abstract−M/S Hindustan Copper Limited (HCL), India generates large amounts of lean sulfide ores of copper. The current production of lean copper ores in India is 0.55 million tons with ~0.3% average copper content. Heap-bioleaching of the lean copper ores in 15 and 30 ton scales was undertaken at IMMT, Bhubaneswar. The leaching study showed
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