Economic Assessment of an In Situ Leaching Operation with …
In situ leaching (ISL) is an attractive technique that enables copper recovery from copper oxide ores that are either low-grade or located at depths too great to be economically exploited through conventional methods. At present, in situ leaching (ISL) has been applied to intact copper oxide ores, in particular, those which (i) present a good …
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Copper Mineral Leaching Mathematical Models—A …
Leaching processes can be defined as the selective removal and/or extraction of metallic values from a mineral, causing a suitable solvent of the leaching …
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(PDF) 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 ...
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Bioleaching of copper from chalcopyrite ore at higher NaCl
Typical copper bio heap leaching characteristics are ore particle size distribution (PSD) 19–25 mm, lixiviant irrigation rates between 5 and 20 L/m 2 /h, aeration rates from 0.1 to 0.5 Nm 3 /m 2 /h, ... Due to the lack of complete insulation of the 2-meter leaching column, a large amount of this heat was wasted during the 120 days of the ...
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Optimizing the Leaching Parameters and Studying …
We investigated the leaching of copper with Phanerochaete chrysosporium (P. chrysosporium) from waste printed circuit boards (WPCBs). Leaching of copper after …
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Influence of soil characteristics and leaching rate on copper …
The leaching experiments were conducted in columns filled identically up to 30 cm with each soil sample. Then, 0.6 mg of Cu kg −1 was added to the soil surface in the sulfate form (CuSO 4 .5H 2 O). The results showed that soil Cu loss increased mainly with leaching rate: y = 0.004 x – 0.10 (R 2 = 0.97) where y: soil Cu loss (10 −4 meq 100 ...
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Column Leach Test Procedure & Variables
Results from leach columns 1, 2, and 9 were used to evaluate three different particle sizes. The maximum particle size in leach column 1 was ¾", ½" in 9, and 3/8″ in leach column 2. After 55 days of testing, leach column 1 reached a recovery of 68.8% of soluble copper, leach column 9 … See more
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[PDF] Agitation and column leaching studies of oxidised copper …
DOI: 10.1016/J.MINENG.2017.06.001 Corpus ID: 103232914; Agitation and column leaching studies of oxidised copper-cobalt ores under reducing conditions @article{Ntakamutshi2017AgitationAC, title={Agitation and column leaching studies of oxidised copper-cobalt ores under reducing conditions}, author={Patrick Tshibanda …
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Deconstructing the Leaching Ratio | Mining, …
Dynamic mass balance simulation of leaching columns of copper oxide ore at different column heights (color legend:,, and ) and acid concentration in the irrigation …
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Recovery prediction of copper oxide ore column leaching …
In a pilot-scale column leaching of copper oxide ore, parameters such as column height, particle size, acid flow rate, and leaching time were studied to optimize the process (Hoseinian et al ...
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LixTRA™ – Novel Copper Leach Technology
Typical heap leach bacteria & archaea. Solid liquid separation. Solvent extraction. Electrowinning. Based on extensive Research and Development, novel LixTRATM …
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Leaching Behavior of Copper (II) in a Soil Column Experiment …
This behavior has also been observed by (Xu et al., 2005) during leaching experiments on a polluted soil column at the laboratory with deionized water (DIW) at a flow rate of 1.0 ml min -1, The ...
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A comprehensive model for copper sulphide heap leaching …
The basic formulation of a comprehensive heap leaching copper model based on CFD technology, together with its parameterization and validation against laboratory column test data is developed by ...
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Agitation and column leaching studies of oxidised copper …
Sulphuric acid agitation and column leaching tests of an oxidised copper-cobalt-bearing ore (1.44% Cu and 1.04% Co) were performed to investigate its amenability to copper and cobalt metals extraction under reducing conditions. Oxidised copper-cobalt-bearing ores from the Congolese Copperbelt contain a large proportion of cobalt in …
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How copper dump leaching works
Both phenomena have been observed in column leaching studies: copper recovery tends to be relatively lower in the coarse size fractions and relatively higher in the finer size fractions (Bennett et al., 2012, Kodali et al., 2011); and the entire ore particle size distribution tends to shift towards the fines (Ghorbani et al., 2011).
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Recovery of gold, silver, copper and niobium from printed …
Montero et al. (2012) studied the recovery of silver by cyanide column leaching technique followed by carbon adsorption process. In the leaching stage, recovery of silver was 51.5% and ...
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(PDF) Agglomeration and leaching behaviors of copper …
Abstract. 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 ...
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Influence of soil characteristics and leaching rate on copper …
Characteristics of studied soils. Column leaching experiments were carried out to identify Cu migration in three soils located in three different Moroccan areas. The studied soils were collected from 0-30 cm in depth. The first soil (Arenosol) was taken from the Loukkos area (34.96° N, 6.21° W, Northwestern Morocco).
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Contrasting mobility of arsenic and copper in a mining soil: …
Leaching columns and pot experiments evaluated copper and arsenic in soil pore waters, as well as pH, dissolved organic carbon (DOC) and phosphate (PO 4 3−) concentrations. The uptake of As and Cu to ryegrass was also measured via the pot experiment, whilst recovered biochars from the column leaching test were measured for …
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Oxide Copper Leach Modeling
The acid is consumed continuously even after leaching most of the copper. Figure 3 is a plot of copper recovery represented by fraction reacted of an ore particle versus a "normalized" hydrogen ion consumption. Normalized is defined as the cumulative amount of hydrogen ion consumed divided by the total original amount of copper in the …
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Assessment of the potential mobility of copper in …
The column leaching behavior of lead and zinc is studied on a soil sample from the Amizour-Bejaia mining region, which is one of Algeria's largest natural reserves for Pb and Zn ores.
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Optimization of an Ion Exchange Process for the Selective …
Optimization of an Ion Exchange Process for the Selective Recovery of Cobalt and Copper from Heap Leaching Waste Materials Janith Abeywickrama*, Nils Hoth and Carsten Drebenstedt. TU Bergakademie Freiberg, Institute for Mining, Gustav-Zeuner-Straße 1a, Germany ... Columns A1 and A2 were loaded until the exhaustion point of copper. …
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In situ leaching of copper: Challenges and future prospects
Some intact copper ISL projects have attempted to use column leaching of fragmented ore (Brewer, 1998, Huss et al., 2014, Isaacson et al., 1990, Schmidt and Earley, 1997), but this approach has limited ability to emulate leaching of an intact formation for several reasons. Crushing exposes fresh mineral surfaces to the lixiviant, whereas the ...
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Column bioleaching of low-grade copper ore by …
The copper extraction rate slowed down and achieved 14.87% and 20.11% at day 102 in columns A and B, respectively. The copper extraction in the abiotic control (Column C) was about 2.6% at the end of the leaching test. Download : Download full-size image; Fig. 3. Variation of pH during column bioleaching. Download : Download full-size …
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(PDF) Influence of soil characteristics and leaching rate on copper …
Influence of soil characteristics and leaching rate on copper migration: column test
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Influence of surfactant on the permeability at different …
Change curves for copper leaching rates in the column leaching tests. In the initial stages of the column leaching test, most of the ore was leached, and the leaching rate increased rapidly. With continuous cycling of the leaching reaction, the leaching rate for copper ions decreased, and changes in the curve tended to be minimal.
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Ore Column leaching with thermophiles: 1, copper sulfide …
Column bioleaching of chalcopyrite was conducted at 33, 45, and 65 °C, and the copper leaching rates after 220 days were 38.50, 51.35, and 56.75%, respectively.
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Ore column leaching with thermophiles: I, copper sulfide ore
The concentrations of ferrous iron in ore column effluents and the pH of the effluents during the leaching of a copper sulfide ore were followed as an indication of the activity of the microbial populations that were established in the ore columns. The impact of this activity and the release of copper were influenced by addition of ferric iron to the …
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Disentangling effects of temperature on microbial community and copper
Ore column leaching with thermophiles: I, copper sulfide ore. Hydrometallurgy, 127–128 (2012), pp. 62-69. View PDF View article View in Scopus Google Scholar. Okibe et al., 2003. N. Okibe, M. Gericke, K. Hallberg, D. Johnson. Enumeration and characterization of acidophilic microorganisms isolated from a pilot plant stirred-tank …
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Comparison of bioleaching of a sulfidic copper ore …
The results of total iron extraction (Fig. 3 a) go along with copper extraction and was much higher in bioleaching columns when compared to in the control columns. The total iron recoveries from the bioleaching columns were about 4.4 g/l, while the maximum total iron recovery in the control column was less than 1.9 g/l.
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