leaching of refractory copper ore

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Leaching characteristics of copper refractory ore in ...

Nov 01, 2011  Refractory copper ores (CROs) in central Africa contain copper minerals that are locked up in a micacious solid matrix or associated with carbonate, sulfide and phosphate minerals. Several researchers have reported that the recovery of copper from CRO material by an acid-leaching process is not economically feasible, due to the presence of excess gangue-acid-consuming minerals

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leaching of refractory copper ore

Ammonia Leaching Study on Refractory Oxidised . Ammonia leaching research is carried out on a certain oxidised copper ores The effects of oxidized copper ores which came from Yunnan Province were studied in laboratory in order to find out the optimum leaching conditions under normal temperature and pressure The ores belonged to typical high binding rate minerals The optimum conditions

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Advances in high-temperature heap leaching of refractory ...

and refractory ores, as well as smaller deposits. As a result, the level of sophistication that needs to be built into the design and operation of the heap leaching process also increases. The heap leaching of copper ores is an example of such a trend, where heap leaching was initially applied only to the acid leaching of oxide ores.

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INVESTIGATION OF THE AMENABILITY OF A COPPER-RICH ...

In this study, the amenability of a copper-rich refractory gold ore to cyanide leaching was investigated. The effect of H 2 SO 4 pretreatment for reactive copper removal on the gold extraction in the subsequent cyanide leaching was examined. Effect of cyanide concentration in the range of 1-8 g/L NaCN was also tested on the cyanide leaching of ...

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A hybrid leaching process to enhance the dissolution of ...

The leaching process must enhance the dissolution of copper sulphide ore that are refractory to conventional leaching. This paper reports a study on the effect of addition ...

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A hybrid leaching process to enhance the dissolution of ...

Chingola refractory ore (CRO) is known to exhibit low, unsatisfactory leach efficiency under conventional leaching • The hybrid leaching process can effectively leach the refractory cupriferous micas in the CRO under ambient conditions. • Agglomeration, acid curing and column leaching of the CRO enhanced overall copper dissolution to 60% •

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(PDF) Treatment of a Copper-Rich Gold Ore by Ammonia ...

During the early 1970's 2.5 million tonnes of refractory copper ore were processed through the TORCO process plant located at Akjoujt in Mauritania. ... The concept of leaching copper–gold ores ...

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(PDF) A STUDY OF LEACHING OF COPPER OXIDE ORE BY

Oct 27, 2013  The overall yield of refined ore after flotation and leaching is over 89.18% of the copper, which is much better than sole flotation or leaching. A copper product containing more than 99.9% copper ...

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Refractory copper ore from Nchanga, Zambia: A materials ...

Experimental investigation was conducted on a low-grade copper ore in Tajikistan with grade of 0.89% and oxidation rate of 99%, which belongs to refractory oxide copper with low-grade and high ...

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LEACHING OF LOW-GRADE COPPER ORES: A CASE STUDY

This paper deals with the investigation of column leaching of low-grade ores from the copper mine Cerovo, Serbia (the approximate Cu content in the ore ranges from 0.2 - 0.3 % with >10 % copper in the form of oxide minerals). The leaching experiments were performed using sulphuric acid solutions, whereby the kinetics of copper

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Copper Leaching from Refractory Flotation Tailings

Apr 18, 2018  copper sulfide and free oxidation copper in the raw ore were recycled by flotation, but the other refractory copper oxides, mainly the combination copper oxide, were not thoroughly recycled and the majority were lost in the tailings. As is typical for flotation tailings containing silicate gangue minerals, high temperature leaching was used [12].

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leaching of refractory copper ore

Ammonia Leaching Study on Refractory Oxidised . Ammonia leaching research is carried out on a certain oxidised copper ores The effects of oxidized copper ores which came from Yunnan Province were studied in laboratory in order to find out the optimum leaching conditions under normal temperature and pressure The ores belonged to typical high binding rate minerals The optimum conditions

More

A HEAP LEACH FEASIBILITY STUDY FOR MIMBULA

The ore considered for heap leach is CRO which comprise of Mimbula, Kakosa, to mention but a few. Studies done on Mimbula ore have been on agitation leaching, high temperature and pressure leaching, treatment of refractory copper ore (TORCO) process. However, these leaching methods

More

A hybrid leaching process to enhance the dissolution of ...

The leaching process must enhance the dissolution of copper sulphide ore that are refractory to conventional leaching. This paper reports a study on the effect of addition ...

More

INVESTIGATION OF THE AMENABILITY OF A COPPER-RICH ...

In this study, the amenability of a copper-rich refractory gold ore to cyanide leaching was investigated. The effect of H 2 SO 4 pretreatment for reactive copper removal on the gold extraction in the subsequent cyanide leaching was examined. Effect of cyanide concentration in the range of 1-8 g/L NaCN was also tested on the cyanide leaching of ...

More

A hybrid leaching process to enhance the dissolution of ...

Chingola refractory ore (CRO) is known to exhibit low, unsatisfactory leach efficiency under conventional leaching • The hybrid leaching process can effectively leach the refractory cupriferous micas in the CRO under ambient conditions. • Agglomeration, acid curing and column leaching of the CRO enhanced overall copper dissolution to 60% •

More

Response Surface Methodology for Optimization of

copper sulfide and free oxidation copper in the raw ore were recycled by flotation, but the other refractory copper oxides, mainly the combination copper oxide, were not thoroughly recycled and the majority were lost in the tailings. As is typical for flotation tailings containing silicate gangue minerals, high temperature leaching was used [12].

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LEACHING OF LOW-GRADE COPPER ORES: A CASE STUDY

This paper deals with the investigation of column leaching of low-grade ores from the copper mine Cerovo, Serbia (the approximate Cu content in the ore ranges from 0.2 - 0.3 % with >10 % copper in the form of oxide minerals). The leaching experiments were performed using sulphuric acid solutions, whereby the kinetics of copper

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Copper extraction - Wikipedia

Sulfide ores. Secondary sulfides – those formed by supergene secondary enrichment – are resistant to sulfuric leaching.These ores are a mixture of copper carbonate, sulfate, phosphate, and oxide minerals and secondary sulfide minerals, dominantly chalcocite but other minerals such as digenite can be important in some deposits.. Supergene ores rich in sulfides may be concentrated using ...

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Processing of Konkola copper concen- trates and Chingola ...

trates and Chingola refractory ore in a ... with the availability of oxide ores and an existing leach plant at Nchanga, present an attractive set of advantages for the KCM pressure leaching option. Against this however, is the ... refractory copper-bearing micas in the CRO ore at elevated temperatures.

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TREATMENT OF A COPPER - RICH GOLD ORE BY AMMONIA

Copper minerals present difficulties during the cyanide leaching of gold ores leading to excessively high consumption of cyanide (and oxygen) coupled with low extraction of gold. Copper cyanide ... cyanidation of gold can be suitably used for copper-bearing refractory gold ores as also noted by others (Tran et al, 1997, Muir, 2011).

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Improvements in Copper heap leaching by use of wetting

Modelling copper heap leaching Leaching implies a reaction between solid particles and a liquid phase. The “shrinking core” model describes the leaching process of an idealized oxide copper ore particle [1]. This particle reacts from the surface inwards. During the continuous reaction a leached rim is formed, composed mainly of gangue.

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ALTA 2018 Refractory and Complex Gold Ores Panel Discussion

Oct 25, 2018  Heap Leaching of Refractory Gold Ores. AT (chair) noted that in copper, there is a focus on heap leaching for treating low grade chalcopyrite ores. Two processes currently making progress are bio ...

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VAT leaching of copper oxide ore - Hydrometallurgy ...

Hi We are planning a VAT leaching for HMS rejects of copper oxide ore. We are stuck at design and would value inputs. We are planning for a 5000 tons holding capacity for the VAT and feed grade is 1% copper. Size of feed 100% passing 20 mm. Would there be any channeling effect in the VAT as we are p

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Copper Leaching from Refractory Flotation Tailings

Apr 18, 2018  copper sulfide and free oxidation copper in the raw ore were recycled by flotation, but the other refractory copper oxides, mainly the combination copper oxide, were not thoroughly recycled and the majority were lost in the tailings. As is typical for flotation tailings containing silicate gangue minerals, high temperature leaching was used [12].

More

A HEAP LEACH FEASIBILITY STUDY FOR MIMBULA

The ore considered for heap leach is CRO which comprise of Mimbula, Kakosa, to mention but a few. Studies done on Mimbula ore have been on agitation leaching, high temperature and pressure leaching, treatment of refractory copper ore (TORCO) process. However, these leaching methods

More

LEACHING OF LOW-GRADE COPPER ORES: A CASE STUDY

This paper deals with the investigation of column leaching of low-grade ores from the copper mine Cerovo, Serbia (the approximate Cu content in the ore ranges from 0.2 - 0.3 % with >10 % copper in the form of oxide minerals). The leaching experiments were performed using sulphuric acid solutions, whereby the kinetics of copper

More

Improvements in Copper heap leaching by use of wetting

Modelling copper heap leaching Leaching implies a reaction between solid particles and a liquid phase. The “shrinking core” model describes the leaching process of an idealized oxide copper ore particle [1]. This particle reacts from the surface inwards. During the continuous reaction a leached rim is formed, composed mainly of gangue.

More

Processing of Konkola copper concen- trates and Chingola ...

trates and Chingola refractory ore in a ... with the availability of oxide ores and an existing leach plant at Nchanga, present an attractive set of advantages for the KCM pressure leaching option. Against this however, is the ... refractory copper-bearing micas in the CRO ore at elevated temperatures.

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(PDF) LEACHING OF A ROASTED COPPER SULFIDE ORE

LEACHING OF A ROASTED COPPER SULFIDE ORE Rosselle Kim P. Castillano, Wilfredo T. Gatdula Jr., Gin Derick L. Magno, Jhunalyn H. Parantar METE 157N: HYDROMETALLURGY LABORTORY ABSTRACT Sulphide ores of copper are insoluble in dilute sulphuric acid leaching solutions, but a very high extraction can be obtained if the copper ore is in the oxidized condition.

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Characterization and kinetic study on ammonia leaching of ...

May 01, 2014  Ammonia leaching kinetics of a complex Cu-ore assaying 8.8% Cu and 36.1% Fe was examined. Mineralogical characterization indicated that the major phase of the ore was siderite with chalcopyrite as the major sulfide mineral. ... Treatment of a refractory gold−copper sulphide concentrate by copper ammoniacal thiosulphate leaching [J ...

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VAT leaching of copper oxide ore - Hydrometallurgy ...

Hi We are planning a VAT leaching for HMS rejects of copper oxide ore. We are stuck at design and would value inputs. We are planning for a 5000 tons holding capacity for the VAT and feed grade is 1% copper. Size of feed 100% passing 20 mm. Would there be any channeling effect in the VAT as we are p

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Pretreatment Process on Refractory Gold Ores with As

The research of bacterial peroxidation is quite active. The technology started to process ores in the 1950 s, and at first leached to recovery copper from the low-grade copper ore or marginal copper ore. In the mid-1980 s, the first commercial plant which applied bacterial oxidation to pretreat refractory gold ores was built in South Africa.

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Oxidative leaching of refractory sulphidic gold tailings ...

Sep 01, 2020  Leaching and CIL processes in gold recovery from refractory ore with thiourea solutions Miner. Eng. , 20 ( 6 ) ( 2007 ) , pp. 559 - 565 , 10.1016/j.mineng.2006.11.003

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Research on Reinforcing Acid Leaching of a Refractory ...

The characteristics of Yangla copper oxide ore and acid leaching of this copper ore were investigated. The results indicate direct dump acid leaching of raw ore is not feasible for the treatment of this copper ore in practice. Sieve sizing-warming-stirring-acid leaching process was employed for the treatment of the fine grain materials below 1m, while 66.19% copper leaching efficiency and10.92 ...

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Response Surface Methodology for Optimization of

copper sulfide and free oxidation copper in the raw ore were recycled by flotation, but the other refractory copper oxides, mainly the combination copper oxide, were not thoroughly recycled and the majority were lost in the tailings. As is typical for flotation tailings containing silicate gangue minerals, high temperature leaching was used [12].

More

Study on Recovery of Associated Copper Oxide Ore by ...

new way for the development and utilization of refractory copper oxide ore and mixed copper ore. In most copper oxide ores, in addition to copper oxide minerals, there are usually a small amount of natural copper and copper oxide minerals. The leaching of the latter two types requires the

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The status of copper gold ore processing and leaching ...

Mar 14, 2012  Leaching of refractory copper-gold ore cyanidation and cyanidation, thiosulfate, thiourea, halogenated France, sulfur compounds and France is a major non-cyanide process. These non-cyanide gold leaching technology has its own characteristics, environmental characteristics, and economic characteristics, in recent years to study more, faster ...

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