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automatic control of copper heap leaching

Automating and Optimizing Copper Heap

2021-3-17  The acid leaches out the copper, along with other minerals, which can be extracted chemically. A typical pad measures 1.6-km (1-mile) long and 0.8-km (0.5-miles) wide. Working day after day, the stacker creates individual

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Temperature control in copper heap bioleaching

2018-3-1  The operation uses heap and dump leaching, solvent extraction (SX), and electrowinning (EW), to produce copper cathodes. The heap studied had a total copper grade of 1.48%, of which 8% was soluble copper (oxides), 74% was cyanide soluble copper (chalcocite), and 18% was insoluble copper (chalcopyrite).

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Temperature control in copper heap bioleaching - Elsevier

Heap leaching is being increasingly explored as a lower cost metallurgical technology to extract copper from sulfide ores of low grade and quality. Heap temperature is a critical factor in achieving economic copper extraction. The determination and control of heap temperature is challenging due to the intrinsic complexity of the intertwined ...

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Temperature control in copper heap bioleaching

Temperature is a critical factor controlling copper extraction in heap leaching. ... The determination and control of heap temperature is challenging due to the intrinsic complexity of the intertwined fundamental processes occurring simultaneously inside a heap. In this study, we applied the HeapSim-2D model, calibrated using data provided by ...

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SART for copper control in cyanide heap leaching

SART for copper control in cyanide heap leaching. December 2011; Journal- South African Institute of Mining and Metallurgy 112(12):1037-1043; Authors: ...

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SART for copper control in cyanide heap leaching

2016-12-19  Many copper-laden precious metal deposits are, and have been historically, dismissed as economically and technically unattractive, with operators instead focusing on heap leach projects that do not require control of copper in the leaching process. However, with the decreasing number of such ideal projects, coupled with high metals prices in recent

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(PDF) Heap Leaching: Practice and Fundamentals

2004-11-26  A very broad range of processes are used for the recovery of valuable metals. Heap leaching as a hydrometallurgical process is one of the

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In situ leaching of copper: Challenges and future prospects

2015-10-1  Commercial copper ISL operations have reported estimated recoveries in the range of 20%–70% (Bernal and Venero, 1985, Lewis et al., 1976, Niemuth, 1994, O’Gorman et al., 2004), whereas conventional heap leaching generally results in 65%–90% recovery (Young, 1999). Both recovery and reagent consumption over the life of an ISL project are ...

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Crushed ore agglomeration and its control for heap leach

2013-2-1  Based on the extensive experience of heap leaching operations, crushed ore agglomeration can be successfully considered and utilized as a pretreatment step for the heap leaching of ores containing significant amounts of fines and clay minerals. The drum agglomeration is considered as a pretreatment step for the heap leaching of copper and gold ...

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Heap Leaching - an overview ScienceDirect Topics

Mark E. Schlesinger, ... William G. Davenport, in Extractive Metallurgy of Copper (Fifth Edition), 2011 15.4.2.6 Irrigation of Heap. In industrial heap leaching, the lixiviant used is the copper-depleted raffinate returning from SX (Fig. 15.2).This has a typical composition of 0.4 g/L Cu and ~5–10 g/L H 2 SO 4.Further sulfuric acid may be added to the raffinate before it is recycled to

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Temperature control in copper heap bioleaching - Elsevier

Heap leaching is being increasingly explored as a lower cost metallurgical technology to extract copper from sulfide ores of low grade and quality. Heap temperature is a critical factor in achieving economic copper extraction. The determination and control of heap temperature is challenging due to the intrinsic complexity of the intertwined ...

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Heap Leaching - Mineral Processing Metallurgy

2016-6-13  heap leaching of copper ores leaching oxidized copper ores effect of strength of acid in leaching. Heap Leach Pad Design. Because flow is downward in percolation leaching, the leach pad is the most important element of the

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Temperature control in copper heap bioleaching — 早稲田

TY - JOUR T1 - Temperature control in copper heap bioleaching AU - Liu, Wenying AU - Granata, Giuseppe PY - 2018/3/1 Y1 - 2018/3/1 N2 - Heap leaching is being increasingly explored as a lower cost metallurgical technology to extract copper from sulfide ...

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SART for copper control in cyanide heap leaching

SART for copper control in cyanide heap leaching. December 2011; Journal- South African Institute of Mining and Metallurgy 112(12):1037-1043; Authors: ...

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SART for copper control in cyanide heap leaching

2016-12-19  Many copper-laden precious metal deposits are, and have been historically, dismissed as economically and technically unattractive, with operators instead focusing on heap leach projects that do not require control of copper in the leaching process. However, with the decreasing number of such ideal projects, coupled with high metals prices in recent

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Investigation of Affecting Parameters on Heap Leaching

Abstract: Heap leaching method is known as cheap method for copper extraction. Presence of clay and acid consumer waste minerals are the most critical issues because they may bring out the process from economic mode. For reduce acid consumption and increasing copper extraction in heap leaching method, about 3 tons sample was taken randomly from

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Leaching of Copper Sulphides - SAIMM

2016-6-8  POX in a copper heap leach circuit. Figure 2. Simplified ferric leaching flowsheet. Figure 3. Copper chloride leach process. Leaching Chemistry As outlined earlier, the leaching chemistry that takes place within a total POX autoclave is very complex and will vary from case to case according to the mineralogy of the concentrate fed to the

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Ore agglomeration behavior and its key controlling factors

2021-1-10  In 1970s, to ameliorate the undesirable leaching condition and obtain better extraction efficiency, the agglomeration and its processing controls were firstly mentioned in Nevada of the United States (Johnson and Roberto, 1997; Potter, 1981).As Fig. 2 shows, the basic operating procedure of agglomerated heap could be described that: 1) the coarse ores were crushed

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Control of redox potential by oxygen limitation in selective ...

2014-10-4  As shown in Fig. 3a, the copper and iron leaching rates are very slow at E h of 640 mV. Copper and iron extractions reach 80 % and 5 % after 20 days, respectively. In contrast, both copper and iron dissolve more fast as E h is higher than 800 mV (Fig. 3d), resulting in that copper extraction achieves 80 % and 90 % after 10 and 12 days, respectively, and iron extraction

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Heap Leach: Mining's breakthrough technology

2015-8-20  Copper Heap Leaching (Solvent Extraction-Electrowinning – SX-EW) In 2014, more than 50 major HL-SX-EW operations worldwide recovered approx. 3 million tonnes of copper, which represents roughly ...

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Revolutionizing a Chilean copper mine with high-tech

2022-4-14  Chile is home to the world’s largest supply of copper, but the process of extracting it can be time-consuming, costly and dangerous for workers – a challenge EPCM and its Tecnologias COBRA division tackled with high-tech solutions at one major mine. The key to success was re-visioning how the mine handles a process called “heap leaching ...

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Heap Leaching: Extending Applications - E MJ

2020-4-8  A look at developments in heap-leaching technology and how mining companies are successfully extending its application range. By Simon Walker, European Editor. The concept of leaching metals from their host rocks was almost certainly discovered by accident, when an ancient found copper being deposited on a piece of iron lying in a stream.

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Sulfuric acid injection in copper heap leaching LEWA

The leaching reagent (dilute sulfuric acid) is sprayed through sprinklers on top of the heap pile and allowed to trickle down through the heap, where it dissolves the copper from the ore. The resulting solution of sulfuric acid and copper sulfate is collected in a small pool. Copper concentration is around 65%. Next step is solvent extraction.

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Leaching of Copper Sulphides - SAIMM

2016-6-8  POX in a copper heap leach circuit. Figure 2. Simplified ferric leaching flowsheet. Figure 3. Copper chloride leach process. Leaching Chemistry As outlined earlier, the leaching chemistry that takes place within a total POX autoclave is very complex and will vary from case to case according to the mineralogy of the concentrate fed to the

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Application of SART to Heap Leaching of Gold-Copper

for every kg of cyanide soluble copper extracted. Therefore, if the ore has 40 g/t of cyanide-soluble copper, then the minimum quantity of cyanide required for copper leaching is 0.1 kg NaCN/t. If the quantity of copper extracted increases to 300 g/t then the cyanide requirement increases to 0.7 kg NaCN/t. Viewed another way, since the 3 moles

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HEAP LEACHING TECHNIQUE in MINING

The heap leaching process has been successfully applied to very low grade base metal (copper, zinc, nickel and cobalt) and precious metal (gold and silver) ores since 1969. Techniques

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LEACHING OF COPPER CONCENTRATES

2020-4-2  copper oxides have been in common use for some time. Prior to the development of the Sherritt-Gordon process for nickel and cobalt in which copper is recovered as high grade copper sulfide, copper sulfides were economically recovered in a hydrometallurgical process only during the leaching of waste dumps. . Need for Hydrometallurgical Processes

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mining heap leaching vs in situ copper - fourcinq.au

Heap leaching is carried out in the extraction of copper, nickel, uranium and precious metals. Insitu Leaching. Insitu leaching is also known as insitu recovery, or solution mining. This is especially used to extract copper and uranium. In this process, holes are drilled into the ore deposit by explosive or fracturing methods.

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Bioleaching: Introduction, Methods, Application, Copper,

2022-5-22  Generally heap leaching process is employed in copper leaching process but sometimes a combination of heap leaching and in situ leaching processes are used. The solution (Sulphate/Fe 3 solution) is sprinkled over the heap which percolates through the ore and collects at the bottom pit. The solution collecting in the bottom pit will include ...

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