processus de minéralisation de cuivre

Pretreatment of Copper Sulphide Ores Prior to Heap

2021.7.2  This study presents a review of various pretreatment methods prior to heap leaching to aid in the dissolution of copper from sulphide ores. Different variables of pretreatment that affect the extraction of copper were identified, including the type of

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Pretreatment of copper ore prior to heap leaching

Pretreatment of copper ore prior to heap leaching includes crushing and agglomeration processes which were studied in this thesis research. Crushing is a high energy

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Pretreatment of Copper Sulphide Ores Prior to Heap

2022.8.6  This study presents a review of various pretreatment methods prior to heap leaching to aid in the dissolution of copper from sulphide ores. Different variables of

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(PDF) metals Pretreatment of Copper Sulphide

2021.7.2  This study presents a review of various pretreatment methods prior to heap leaching to aid in the dissolution of copper from sulphide ores. Different variables of pretreatment that affect...

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[PDF] Pretreatment of Copper Sulphide Ores Prior to Heap

Several investigations were developed evaluating the effects of pretreatment, mainly in the extraction of copper from chalcopyrite in chloride media. This study presents a review of

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Pretreatment of copper ore prior to heap leaching

2012.6.22  Pretreatment of copper ore prior to heap leaching includes crushing and agglomeration processes which were studied in this thesis research. Crushing is a high

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Pretreatment of Copper Sulphide Ores Prior to Heap

2021.7.2  Due to the depletion of oxidized copper ores, hydrometallurgical plants are running out of ore to process. Therefore, by dissolving the copper sulphide ores through

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Pretreatment of copper ore prior to heap leaching

2011.1.1  Pretreatment of copper ore prior to heap leaching includes crushing and agglomeration processes which were studied in this thesis research. Crushing is a high

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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

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Acid curing and agglomeration for heap leaching

2017.1.1  At the Zaldivar mine site in Chile, 150,000 tons per year of copper is recovered by heap leach – SX/EW process (Zaldivar, 2016). The crushed ore is treated

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Pretreatment of Copper Sulphide Ores Prior to Heap

2022.8.6  obtaining a copper extraction of 6.05% for sulphide copper ores without pretreatment and 8.17% with pretreatment, while for copper oxide minerals, a copper extraction of 84.81% was obtained without pretreatment, and 93.74% with pretreatment, in addition to a decrease in the consumption of sulphuric acid of 28.8% for copper

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Pretreatment of Copper Sulphide Ores Prior to Heap

2021.7.2  Although the main cause of hydrometallurgical plant closures is the depletion of oxidized copper minerals reserves, the lack of new hydrometallurgy projects also contributes to these closures. One solution is to be able to process copper sulphide ores hydrometallurgically. However, it is widely known that sulphide copper ores—and

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Pretreatment of copper ore prior to heap leaching

2012.6.22  Pretreatment of copper ore prior to heap leaching includes crushing and agglomeration processes which were studied in this thesis research. Crushing is a high energy consuming process. In mining operations generally jaw and gyratory crushers are used for primary crushing and cone crushers are used for secondary crushing. During the

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PRETREATMENT OF COPPER ORE PRIOR TO HEAP

2017.6.21  In the case of the copper sulfide ore, copper recovery was found to be independent of the crushing technique despite the fact that more particle damage was observed in products from HPGR crushing. This unexpected behavior for the copper sulfide ore might be due to the high head grade (0.8% Cu for the copper sulfide ore and

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Crushed ore agglomeration and its control for heap leach

2013.2.1  Abstract. 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 ...

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Pretreatment of Copper Sulphide Ores Prior to Heap

2021.7.2  Although the main cause of hydrometallurgical plant closures is the depletion of oxidized copper minerals reserves, the lack of new hydrometallurgy projects also contributes to these closures. One solution is to be able to process copper sulphide ores hydrometallurgically. However, it is widely known that sulphide copper ores—and

Read More
[PDF] Pretreatment of Copper Sulphide Ores Prior to Heap

This study presents a review of various pretreatment methods prior to heap leaching to aid in the dissolution of copper from sulphide ores. Different variables of pretreatment that affect the extraction of copper were identified, including the type of salts used in agglomeration, curing time, and curing temperatures.

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Evaluation of stucco binder for agglomeration in the heap leaching

2011.7.1  These problems are mitigated to some extent by agglomeration pretreatment prior to heap leaching. Sulfuric acid leach solution is the conventional liquid bridge used for copper ore agglomeration ...

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Pretreatment of Copper Sulphide Ores Prior to Heap

the effects of pretreatment, mainly in the extraction of copper from chalcopyrite in chloride media. This study presents a review of various pretreatment methods prior to heap leaching to aid in ...

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Evaluation of stucco binder for agglomeration in the heap

2011.7.1  Garcia and Jorgensen (1997) recommended the need for agglomeration of ore with binder, if the ore contains more than 10–15% −74 μm (200#) fines. The two key factors for any heap leaching operation are copper recovery and acid consumption. For heap leaching operations, the use of cost effective binders for agglomeration is being

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Pretreatment of copper ore prior to heap leaching - 百度学术

Pretreatment of copper ore prior to heap leaching includes crushing and agglomeration processes which were studied in this thesis research. Crushing is a high energy consuming process. In mining operations generally jaw and gyratory crushers are used for primary crushing and cone crushers are used for secondary crushing.

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Methods of Ore Pretreatment for Comminution

2020.4.3  The comminution of ores consumes a high portion of energy. Therefore, different pretreatment methods of ores prior to their comminution are considered to reduce this energy. However, the results

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Effect of pretreatment prior to leaching on a chalcopyrite

2020.9.1  Chalcopyrite is the most abundant copper ore mined in Chile. Hydrometallurgical plants are currently changing to concentration by flotation-matte smelting deposits when oxide minerals run out and chalcopyrite appears in deposits. ... Pretreatment of copper ore prior to heap leaching. The University of Utah (2010) Google Scholar [27]

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Minerals Free Full-Text Accelerating Copper Leaching from

2019.4.25  This work investigates the effect of an agglomeration and curing pretreatment on leaching of a copper sulfide ore, mainly chalcopyrite, using mini-columns in acid-nitrate-chloride media. Ten pretreatment tests were conducted to evaluate different variables, namely the addition of nitrate as NaNO3 (11.7 and 23.3 kg/ton), chloride as

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Pretreatment of Copper Sulphide Ores Prior to Heap

2021.7.2  Although the main cause of hydrometallurgical plant closures is the depletion of oxidized copper minerals reserves, the lack of new hydrometallurgy projects also contributes to these closures. One solution is to be able to process copper sulphide ores hydrometallurgically. However, it is widely known that sulphide copper ores—and

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Evaluation of stucco binder for agglomeration in the heap leaching

2011.7.1  A binder in copper heap leaching should withstand the very acidic environment and should not interfere with maintenance of a high bacterial population survival (Lewandowski et al., 2010). Reactions of the binder and the agglomeration solution may occur during agglomeration, transport, and stacking prior to irrigation for heap leaching.

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Pretreatment of copper ore prior to heap leaching

Pretreatment of copper ore prior to heap leaching includes crushing and agglomeration processes which were studied in this thesis research. Crushing is a high energy consuming process. In mining operations generally jaw and gyratory crushers are used for primary crushing and cone crushers are used for secondary crushing. During the past couple of

Read More
Pretreatment of Copper Sulphide Ores Prior to Heap

2021.7.2  Due to the depletion of oxidized copper ores, hydrometallurgical plants are running out of ore to process. Therefore, by dissolving the copper sulphide ores through heap leaching, it would be possible to produce copper in a sustainable way. An alternative to achieve this is by strengthening the agglomeration and curing stages, prior to heap ...

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Acid curing and agglomeration for heap leaching

2017.1.1  Introduction. Acid curing and agglomeration are generally used prior to heap leaching of copper oxide and secondary sulfide ores to improve the copper extraction process. Agglomeration is used to bind fine particles to coarse ones to increases the permeability of an ore heap while acid curing inhibits the dissolution of some silicates and ...

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Effect of pretreatment prior to leaching on a chalcopyrite

DOI: 10.1016/j.jmrt.2020.07.055 Corpus ID: 225269123; Effect of pretreatment prior to leaching on a chalcopyrite mineral in acid media using NaCl and KNO3 @article{Quezada2020EffectOP, title={Effect of pretreatment prior to leaching on a chalcopyrite mineral in acid media using NaCl and KNO3}, author={V{\'i}ctor Quezada

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Crushed ore agglomeration and its control for heap leach

2013.2.1  Section snippets Crushed ore agglomeration. Crushed ore agglomeration has two major aims. First, it is the best opportunity for the thorough application of the leaching solution prior to building the heap and “kick starting” the leaching process itself (Bouffard, 2005, Dhawan et al., 2012a, Kodali et al., 2011a, Purkiss and Anthony, 2004).

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Pretreatment of Copper Sulphide Ores Prior to Heap

metals Review Pretreatment of Copper Sulphide Ores Prior to Heap Leaching: A Review Andrés Neira 1, Diana Pizarro 1, Víctor Quezada 1,* and Lilian Velásquez-Yévenes 2 Citation: Neira, A ...

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Methods of Ore Pretreatment for Comminution

2020.4.3  The comminution of ores consumes a high portion of energy. Therefore, different pretreatment methods of ores prior to their comminution are considered to reduce this energy. However, the results

Read More
Pretreatment to Leaching for a Primary Copper Sulphide Ore

2021.8.10  The dissolution of copper sulphide ores continues to be a challenge for the copper industry. Several media and leaching alternatives have been proposed to improve the dissolution of these minerals, especially for the leaching of chalcopyrite. Among the alternatives, pretreatment prior to leaching was proposed as an option that increases the

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Figure 3.1 from Pretreatment of copper ore prior to heap

Pretreatment of copper ore prior to heap leaching includes crushing and agglomeration processes which were studied in this thesis research. Crushing is a high energy consuming process. In mining operations generally jaw and gyratory crushers are used for primary crushing and cone crushers are used for secondary crushing. During the past couple ...

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Figure 2.31 from Pretreatment of copper ore prior to heap

Pretreatment of copper ore prior to heap leaching includes crushing and agglomeration processes which were studied in this thesis research. Crushing is a high energy consuming process. In mining operations generally jaw and gyratory crushers are used for primary crushing and cone crushers are used for secondary crushing. During the past couple ...

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Pretreatment to Leaching for a Primary Copper Sulphide

2021.8.13  pretreatment of a mine ore, in which the main copper mineral was chalcopyrite. The authors obtained an optimum copper extraction of 58.6% with the addition of 23.3 kg of NaNO3/t, 19.8 kg of NaCl/t, and after 30 days of curing time at 45 C. In addition, the effect of pretreatment was evaluated by leaching efficiency using mini

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A perspective on developments in biohydrometallurgy

2008.11.1  The archaea are also capable of bioleaching molybdenum from highly refractory molybdenite. Bioleach heap processes have been refined from the initial application of copper leach dumps in the 1950s to engineered heaps for bioleaching secondary copper (chalcocite) ore and pretreatment of sulfidic-refractory gold ore.

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Recent Advances in Copper Ore Processing and Extraction

2022.1.28  Producers, however, are facing challenges due to falling head grades and more complex ore mineralogy. In this Special Issue, recent advances in copper ore processing and extraction are discussed, focusing on: innovations in hydrometallurgical, pyrometallurgical, electrometallurgical, and pre-concentration technologies; improving

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Agglomeration in the heap leaching of copper ore

2016.12.4  Copper ore Heap leaching abstract It is known that the presence of excess fines in heap leaching operations may cause low recovery due to reduced heap permeability and/or channeling of lixiviant flow. These problems are mitigated to some extent by agglomeration pretreatment prior to heap leaching. Sulfuric acid leach solution

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