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heap bioleaching of chalcopyrite

  • Leaching of a low grade copper nickel sulfide ore

    <20 from a test heap of copper nickel sulfide ore after about 200 days of leaching Variables tested in bioleaching columns charged with a pyrrhotite rich chalcopyrite and pentlandite ore were acid pre conditioning inoculation and aeration The results indicated that the rapid reaction of pyrrhotite with acid created conditions that impacted directly and/or indirectly on copper recovery

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  • Presentation on mechanisms and applications of

    16.09.2014  Recently biohydrometallurgical extraction of copper from low grade chalcopyrite ore which is quite abundant and widespread in the earth s crust especially applied to heap bioleaching is paid more attention Many studies and researches have been done for that while the operation is yet to be applied successfully at industrial and commercial scale due to the extremely slow leach kinetics

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  • Increased chalcopyrite bioleaching capabilities of

    Low grade chalcopyrite ores could not be economically processed by the conventional energy intensive comminution together with the following floatation and pyrometallurgical technologies while heap bioleaching is a promising alternative ascribing to its appealing characteristics of low investments technical simplicity environmental friendliness and appropriate high recovery yield .

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  • Potential for solar thermal energy in the heap bioleaching

    Bioleaching of chalcopyrite is only possible in the presence of thermophilic micro organisms While suitable conditions can be generated within a heap naturally through the exothermic reaction the effectiveness of the process can be improved with an additional heat source Chilean copper mines are primarily located in the Atacama Desert which has the highest solar irradiation levels on the

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  • Heap leaching

    The Girilambone heap bioleaching operation in Australia which operated between 1993 and 2003 produced about 14 000 t of copper per annum from a chalcocite/chalcopyrite ore The open pit mine is seen in the background with the heap leach pads in the foreground and the hydrometallurgical copper recovery plant situated to the right of the heaps Leaching reagents yellow will solubilise

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  • Heap Leaching of Chalcopyrite

    Chalcopyrite CuFeS2 is the most important copper bearing mineral in the world Bioleaching is an emerging technology with significant potentials to add value to the mining industries The modest nutritional requirements of bioleaching organisms may be provided with the aeration of ironand / or sulfur containing mineral suspensions in water or the irrigation of a heap.

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  • High temperature bioleaching of nickel sulfides

    first metal was produced in October 2008 and heap bioleaching has been performed in two stages namely a primary heap pad with a residencetime of 1.5 years and a secondary pad with a residence time of 3.5 years As high temperatures can be observed during industrial heap bioleaching this study addresses the bioleaching of a complex nickel concentrate containing pentlandite and pyrrhotite

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  • Silicate mineral dissolution during heap bioleaching

    01.03.2008  In this study the effect of silicates present in three separate samples in conjunction with chalcopyrite and a complex multi‐metal sulfide ore on heap bioleaching was evaluated in column bioreactors Fe2 oxidation was inhibited in columns containing chalcopyrite samples A and C that leached 1.79 and 1.11 mM fluoride respectively but not in

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  • The use of heap bioleaching as a pre treatment for

    chalcopyrite and pentlandite respectively Fe was present as pyrite and pyrrhotite with the bulk of the sample being composed of silicate and chromite minerals Table 1 It was suspected that the coarse ore also originating from the Platreef ore body had a similar mineralogy Method Cylindrical columns with heating coils wound around them Figure 1 were used to simulate thermophilic heap

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  • ‪Dr

    Current scenario of chalcopyrite bioleaching A review on the recent advances to its heap leach technology Sandeep Panda Ata Akcil Nilotpala Pradhan Haci Deveci Bioresource Technology 196 694 706 2015 158 2015 Biotechnological strategies for the recovery of valuable and critical raw materials from waste electrical and electronic equipment WEEE A review Arda Işıldar Eric D

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  • 21.04.2021  Appl Environ Microb 65 BK 2008 Heap bioleaching of chalcopyrite a review Miner 795–801 Eng 21 355–365 Vilc´aez J Suto K Inoue C 2008 Bioleaching of chalcopyrite Qiu MQ Xiong SY Zhang WM Wang GX 2005 A with thermophiles temperature–pH–ORP dependence Miner comparison of bioleaching of chalcopyrite using pure culture Process 88 37–44 or a mixed culture

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  • Bioleaching of a polymetallic residue influence of the

    mary heap is re precipitated and remains in the residues In the contrary Cu dissolution is much slower but the kinetics is substantially improved when the temperature is increased Keywords bioleaching nickel copper cobalt pyrrhotite pentlandite chalcopyrite tem perature mining residues

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  • Minerals

    Moreover primary copper sulfide chalcopyrite including chalcopyrite bearing mineral is refractory to be dissolved due to the formation of a passivation layer stable structural configuration and higher lattice energy 1 2 3 Therefore increasing the bioleaching efficiency and ultimate copper extractions from complex copper sources is the most urgent problem affecting the economy of copper

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  • Silicate mineral dissolution during heap bioleaching

    In this study the effect of silicates present in three separate samples in conjunction with chalcopyrite and a complex multi metal sulfide ore on heap bioleaching was evaluated in column bioreactors Fe2 oxidation was inhibited in columns containing chalcopyrite samples A and C that leached 1.79 and 1.11 mM fluoride respectively but not in sample B that contained 0.14 mM fluoride Microbial

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  • Heap bioleaching process

    In order to achieve elevated heap temperatures conducive to chalcopyrite heap leaching sequential populations of bioleaching microorganisms are required This is necessary because microorganisms which predominate at ambient temperature at heap start up are not able to grow and contribute to the bioleaching process at elevated temperatures

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  • Application of bioleaching to copper mining in Chile

    sulphides chalcopyrite covellite bornite enargite were in operation in 1965 in western United States with an estimated annual production of 250 000 tons of copper Evans and Sheffer 1968 Perhaps the first important attempt to evaluate copper heap bioleaching technology in a developing country was the pilot operation established in Toromocho Peru in the mid seventies Heaps and dumps

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  • heap bioleaching of chalcopyrite

    15.11.2020  chalcopyrite bioleaching in heap/dump leach processes can potentially result in lower cost and reduced Documents Similar To Heap Leaching of Chalcopyrite Read More Heap Bioleaching Of Chalcopyrite Bioleaching is the extraction of metals from their ores through the use of living organisms This is much cleaner than the traditional heap chalcopyrite CuFeS 2 Read

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  • heap bioleching

    Heap bioleaching of chalcopyrite A reviewScienceDirect Bioleaching is the extraction of a metal from sulfide ores or concentrates using materials found native to the environment namely water air and microorganisms Get More Heap bioleaching of chalcopyrite A reviewResearchGate Read Microbial colonisation in heaps for mineral bioleaching and the influence of irrigation rate on

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  • A Numerical Evaluation on the Viability of Heap

    03.04.2007  The present numerical evaluation explores into the interactions among the many variables governing the mass and heat transport processes that take place in a heap thermophilic bioleaching system The necessity of using mesophiles together with thermophiles is proved by tracing the activity of both microorganisms individually at each point throughout the heap.

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  • Simulation of Bioleaching Heat Effects for Enhancement of

    Heap bioleaching is a hydrometallurgical process which can take place over a period of months to years It involves the application of acid solution and bacteria either natural or inoculated To keep the aerobic bacteria alive air is injected sparged into the heap using pipes laid before heap stacking The solution infiltrates the heap from the top soaking the ore and leaching the

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  • Comparison of chalcopyrite bioleaching after different

    28.09.2012  The bioleachings of chalcopyrite ore were compared after inoculating different cultures enriched from the original acid mine drainage sample The results showed that the higher bioleaching performance was achieved for inoculation with the enrichment D 0.5 S 2 iron and 1 chalcopyrite compared to other enrichment systems.

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  • Insights into the dynamics of bacterial communities during

    01.10.2010  The Leptospirillum sequences retrieved from the bioleaching of chalcopyrite were mainly affiliated to group I and group II Previous research has found that the Leptospirillum detected in a low grade copper ore bioleaching test heap were affiliated to group II Demergasso et al 2005 .

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  • Microbial miners

    Heap bioleaching of copper is currently conducted at 18 sites around the world concentrated in North and South America and Australia with the largest at Morenci Arizona in the US able to produce 380 000 tonnes of copper a year There is also a related technique known as dump bioleaching which tends to be an offshoot of conventional copper mining operations rather than the main activity

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  • Carbon Assisted Bioleaching of Chalcopyrite and Three

    Overcoming the slow leaching kinetics of refractory primary copper sulfides is crucial to secure future copper sources Here the effect of carbon was investigated as a catalyst for a bioleaching reaction First the mechanism of carbon assisted bioleaching was elucidated using the model chalcopyrite mineral under specified low redox potentials by considering the concept of Enormal.

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  • heap bioleching

    Heap bioleaching of chalcopyrite A review3 Heap bioleaching In general the types of microorganisms found in heap leaching processes are similar to those found in stirred tank processes but the proportion of the microbes may vary depending on the mineral and the conditions under which the heaps or tanks are operated READ MORE Biomass Production and Inoculation of Industrial

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  • Chalcopyrite bioleaching of an in situ leaching system by

    ing heap system while Leptospirillum owned the competitive advantage in the leaching solution system 12 In a successive process of chalcopyrite bioleaching At caldus Sulfobacillus

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  • Thin layer heap bioleaching of copper flotation tailings

    16.08.2016  Thin layer heap bioleaching of copper flotation tailings containing high levels of fine grains was carried out by mixed cultures on a small scale over a period of 210 d Lump ores as a framework were loaded at the bottom of the ore heap The overall copper leaching rates of tailings and lump ores were 57.10wt and 65.52wt respectively.

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  • Assessing a two stage heap leaching process for Platreef

    bioleaching and enable the leaching of copper from chalcopyrite is well documented Watling 2008 Rawlings and Johnson 2007 Stott et al 2003 Plump et al 2002 Dew et al 2000 Stott et al 2000 Norris and Owen 1993 Critical to commercialising this process in heaps is that the oxidation of the sulphide minerals is exothermic and generates enough heat to run the heap under

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  • Relationships between galvanic interaction copper

    05.07.2018  Current scenario of chalcopyrite bioleaching a review on the recent advances to its heap leach technology Panda S Akcil A Pradhan N Deveci H Bioresour Technol 196 694 706 22 Aug 2015 Cited by 13 articles PMID Review

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  • CHALCOPYRITE BIOLEACHING VERSUS PRESSURE

    Beside application in heap leaching it is believed that bacterial leaching can be applied only and effectively to liberate gold from auriferous pyrite concentrate since there is no economic way to get elemental sulfur from pyrite but it cannot be 21 recommended for chalcopyrite concenfrates References 1 F Habashi Chalcopyrite Its Chemistry and Metalluro McGraw Hill New York

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  • Redox controlCentral to the debate around the mechanism of chalcopyrite bioleaching is the apparent passivation of chalcopyrite at high solution redox and low operating temperatures It was however observed by several authors that the passivation of chalcopyrite surfaces could be overcome by control of the redox potential when operating at low temperatures Third et al 2002van der Merwe

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  • Review and prospects of bioleaching in the Chinese mining

    As the world s second largest economy experiencing rapid economic growth China has a huge demand for metals and energy In recent years China ranks first among all the countries in the world in the production and consumption of several metals such as copper gold and rare earth elements Bioleaching which is an approach for mining low grade and refractory ores has been applied in

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  • An agglomerate scale model for the heap bioleaching of

    Heap bioleaching involves stacking the ore to form a heap and applying acidified leaching solution to the top of the heap This technique is used to treat mostly low grade ore and copper is the primary targeted metal although it is also considered for zinc cobalt and nickel recovery It is also used for the pretreatment of refractory gold ores Despite the present widespread use of heap

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  • Minerals

    Chalcopyrite and bornite are two important copper minerals and they often coexist In this study the co bioleaching of chalcopyrite and silver bearing bornite by mixed moderately thermophilic culture at 50 °C was investigated The bioleaching results show that the extraction percentage of Cu for co bioleaching of chalcopyrite Ccp and silver bearing bornite Bn Ccp/Bn = 3 1 was 94.6 .

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  • Investigation into the heap leaching of copper ore from

    Abstract Heap leaching of malachite–atacamite ores with high silica gangue using sulphuric acid is reported The base metals were present in the ores in copper rich nodules with a network of fine strings rich in cobalt and manganese along the quartz grain boundaries It was observed that leaching of copper was quicker and the corresponding recovery of copper was consistently higher when the

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  • Metals tolerance in moderately thermophilic isolates from

    01.03.2009  The mixed chalcocite–chalcopyrite test heap was systematically sampled at the end of its life cycle and portions of the ore from selected locations were used to enrich bioleaching microorganisms The resulting isolates were screened for growth on a variety of substrates in a media of varying compositions and pH in the temperature range 30–60°C 8 .

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  • Optimization of parameters affecting recovery of copper

    mechanism of sulfide mineral bioleaching the heap leaching and reservoir engineering aspects studied are summarized in Tables 3 and 4 Table 2 Names of world s major mines producing copper through mass bioleaching 12 Heap bioleaching of copper ores historical and current Cu production t/year Region/mine Operation reserves t Ore processed t/day 14 15 103 Oxides/chalcocite 16 103

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  • Review and prospects of bioleaching in the Chinese mining

    As the world s second largest economy experiencing rapid economic growth China has a huge demand for metals and energy In recent years China ranks first among all the countries in the world in the production and consumption of several metals such as copper gold and rare earth elements Bioleaching which is an approach for mining low grade and refractory ores has been applied in

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  • Insights into heap bioleaching of low grade chalcopyrite ores A pilot scale study Hydrometallurgy –126 157–165 #2 Panda S et al Two step meso acidophilic bio leaching of chalcopyrite containing ball mill spillage and removal of the surface Passivation layer Bio resource Technol 130 332–338 2013 Recovery of copper from a surface altered chalcopyrite contained ball

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