Ammoniacal Percolation Leaching of Copper Ores:

2013-7-18  The general feasibility of ammoniacal percolation leaching of copper sulphide ores has been demonstrated.

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The current state and future directions of percolation ...

2018-8-15  Percolation leaching can be defined as selective metal extraction using a suitable leaching reagent, which seeps into and flows through ore masses or crushed ore piles that contain the mineral grains (Ghorbani et al., 2016).

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SAIMM - Percolation leaching

2012-12-1  This well-researched process recovers copper cyanide as a precipitate after cyanide leaching. This can be of benefit in those gold- and copper-bearing ores where the copper can interfere in the carbon-in-pulp recovery of the gold. There are many micro-organisms and other reagents that can be used in a percolation heap mode.

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Percolation bacterial leaching of low-grade chalcopyrite ...

2008-6-18  Percolation bacterial leaching of low-grade chalcopyrite using acidophilic microorganisms 529 sufficient contact time between lixiviant and the ore particles.Fig. 10 shows the log (r) versus log (Hb). The slope of the graphwas found to be 0.97, so the rate equation can be written as: α (Hb)0.97 (7)

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(PDF) Percolation bacterial leaching of low-grade ...

About 0.09% dissolution of copper from the ore body per day was obtained from the leaching experiments. The bioleach liquor obtained after leaching was processed through solvent extraction and ...

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The effects of simulated stacking phenomena on the ...

2019-1-15  The source term for copper relies on the copper leaching kinetics described by: (10) X ̇ Cu (t) = k C acid 1-X Cu (t) α ∅ where X Cu is the extent of extraction as a mass fraction of the total copper content, α is the mass fraction of copper that is extractable for a given particle size distribution and leaching conditions (i.e. being ...

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Percolation Leaching of a Chalcopyrite-Bearing Ore at ...

Leaching at ambient temperature resulted in a copper extraction rate of 0.44 pct per 100 days. Increasing the temperature to 500 to 600

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Percolation leaching method - Keyes, Harmon E.

It is generally known in metallurgical leaching practice that there is a minimum degree of fineness to which ore particles may be crushed for subsequent percolation leaching. The reason for this is because the leaching column becomes clogged by the fine material, thus preventing the desired rate of solution percolation.

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LEACHING OF LOW-GRADE COPPER ORES: A CASE

2017-6-9  During the leaching of the ore with sulphuric acid concentration of 0.1 and 0.01 M H2SO4, leaching degree of total copper ranged from about 27 to about 55 %, respectively. Given that the degree of leaching of total copper was larger than the amount of oxide copper present in the sample (41 %), it can be concluded that an oxidation reaction occurs between copper sulphide minerals, followed by dissolution of so formed oxides. The copper content in the leach solution has reached, after 5 days about 1 g dm3 (Fig. 3a). At the very beginning of the process (first two days), around 67 % of copper oxide was leached, after and after 10 days of leaching, leaching

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Accelerating leaching of copper ore with surfactant and ...

2019-3-8  In the later period of leaching, the permeability coefficient was two times higher than that of the control group. Meanwhile, the ore extraction rate increased by approximately 10%. During the leaching process, the surface tension of the solution did not substantially change, and that of the solution with surfactant increased slightly.

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Percolation bacterial leaching of low-grade chalcopyrite ...

2008-6-18  Percolation bacterial leaching of low-grade chalcopyrite using acidophilic microorganisms ... Although extensive works have been reported either with copper or copper-zinc ore, the literature is rather scanty regarding the effect of various parameters which actually determine the rate process.

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Ammoniacal Percolation Leaching of Copper Ores

Ammoniacal Percolation Leaching of Copper Ores The general feasibility of ammoniacal percolation leaching of copper sulphide ores has been demonstrated. The rates are comparable to those of conventional ferric sulphate-sulphuric acid systems, but without the ...

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Agitated Copper Leaching Cementation Process

2016-4-14  PREPARATION OF THE COPPER ORE. This study is limited in general to percolation leaching as it is the most widely used method to give proper contact of solvent with the ore to effect extraction of the copper. One of the important factors in percolation leaching is the size reduction necessary for copper

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(PDF) Percolation bacterial leaching of low-grade ...

About 0.09% dissolution of copper from the ore body per day was obtained from the leaching experiments. The bioleach liquor obtained after leaching was processed through solvent extraction and ...

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SAIMM - Percolation leaching

2012-12-1  The complexity of percolation leaching in practice is confirmed in a paper by J.F. Lupo of Newmont Mining Corporation. Although the paper deals with sustainability, the focus is on issues affecting metal and solution recovery, solution flow and containment, and stability of the ore heap. There are many other aspects mentioned, including ...

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Improvements in Copper heap leaching by use of

2013-10-14  Heap leaching belongs to the group of percolation leaching processes and operates over ground. The procedure is illustrated in Figure 1.The oxide copper ore is piled up on leach pads, which have a slight slope of approx. 3° and a rubber lining, which seals the ground under the heap.

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LEACHING OF LOW-GRADE COPPER ORES: A CASE

2017-6-9  The changes in copper content in the ore with the time of exploitation at the RTB mines [9] Oxide copper ore, mixed oxide-sulphide ores and low-grade copper sulphide ore, which, for economic reasons, cannot be enriched by flotation, may be processed by leaching methods. Agents for leaching copper

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Percolation leaching of a chalcopyrite-bearing ore at ...

2021-8-25  An ore sample containing 0.77 pct cu was leached in a fiberLimestone column by downward percolation of acidified ferric sulfate solutions. Three sets of leaching conditions were investigated: (1) ambient temperature leaching, (2) elevated temperature (50 deg to 60 deg c) leaching, and (3) elevated temperature leaching after inoculation with ...

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Accelerating leaching of copper ore with surfactant and ...

2019-3-8  In the later period of leaching, the permeability coefficient was two times higher than that of the control group. Meanwhile, the ore extraction rate increased by approximately 10%. During the leaching process, the surface tension of the solution did not substantially change, and that of the solution with surfactant increased slightly.

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Agglomeration and leaching behaviors of copper oxides

2021-7-18  The chemical binder is one of the critical factors affecting ore agglomeration behavior and leaching efficiency. In this study, we investigated the effect of the type of binder and mass fraction of the H 2 SO 4 solution used on the curing, soaking, and leaching behavior of agglomerations. The results revealed that Portland cement (3CaOSiO 2, 2CaOSiO 2, and 3CaOAl 2 O 3) was the optimal ...

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Percolation and Agitation Leaching of an Oxidized Copper

This paper summarizes the results of an experimental and economic study undertaken to evaluate the feasibility of treating an oxidized orebody of about 10 million tons, grading about 0.75 per cent copper, by agitation leaching and by percolation leaching.

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NIOSHTIC-2 Publications Search - 10007126 - Modeling of ...

A model for the leaching of oxide ores is developed and correlated with laboratory tests for percolation leaching of copper oxide ore. Using the model, recovery of metal values and lixiviant concentration of the effluent solution at any time may be evaluated. For the copper oxide ore, a simplified version of the model is examined for the leaching mechanism consisting of (1) a surface flush reactio

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OPTIMIZING OF LIXIVIANT AND REDUCTANT ON THE

2015-8-11  - Percolation leaching of copper-cobalt oxidized ores has been demonstrated, as an altemative to actual sulphidization-flotation process at Luiswishi deposit - New concentrator of Kipushi (Republic Democratic of Congo). - Leaching test in column have demonstrated better recovery compared with leaching in stirred tank, which

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Improvements in Copper heap leaching by use of

2013-10-14  Heap leaching belongs to the group of percolation leaching processes and operates over ground. The procedure is illustrated in Figure 1.The oxide copper ore is piled up on leach pads, which have a slight slope of approx. 3° and a rubber lining, which seals the ground under the heap.

Get Price

Percolation leaching of a chalcopyrite-bearing ore at ...

2021-8-25  An ore sample containing 0.77 pct cu was leached in a fiberLimestone column by downward percolation of acidified ferric sulfate solutions. Three sets of leaching conditions were investigated: (1) ambient temperature leaching, (2) elevated temperature (50 deg to 60 deg c) leaching, and (3) elevated temperature leaching after inoculation with ...

Get Price

Accelerating leaching of copper ore with surfactant and ...

2018-7-23  In the later period of leaching, the permeability coefficient was two times higher than that of the control group. Meanwhile, the ore extraction rate increased by approximately 10%. During the leaching process, the surface tension of the solution did not substantially change, and that of the solution with surfactant increased slightly.

Get Price

Accelerating leaching of copper ore with surfactant and ...

2019-3-8  In the later period of leaching, the permeability coefficient was two times higher than that of the control group. Meanwhile, the ore extraction rate increased by approximately 10%. During the leaching process, the surface tension of the solution did not substantially change, and that of the solution with surfactant increased slightly.

Get Price

Minerals Free Full-Text Copper Bioleaching in China ...

The commercial application of copper bioleaching, an environmentally-friendly approach for low-grade and secondary mineral resources recycling, has increased worldwide since the 2000s. As the world’s second-largest economic entity and the largest developing country, China has the largest demand for metal resources, significantly advancing the theory and industrial technology of copper ...

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Percolation leaching Article about percolation leaching ...

percolation leaching. [ pərkə′lāshən ‚lēchiŋ] (mining engineering) The selective removal of a mineral by causing a suitable solvent to seep into and through a mass or

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LEACHING OF LOW-GRADE COPPER ORES: A CASE

2017-6-9  The changes in copper content in the ore with the time of exploitation at the RTB mines [9] Oxide copper ore, mixed oxide-sulphide ores and low-grade copper sulphide ore, which, for economic reasons, cannot be enriched by flotation, may be processed by leaching methods. Agents for leaching copper

Get Price