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Heap bioleaching of chalcopyrite: A review -

3 rijen  01-04-2008  Chalcopyrite, the most important ore of copper, is not successfully bioleached with mesophiles due ...

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Heap bioleaching of chalcopyrite: A review -

In this piece of review work, the microbiological and other important aspects of chalcopyrite heap bioleaching processes are discussed. The modest nutritional requirements of bioleaching organisms may be provided with the aeration of iron- and/or sulfur-containing mineral suspensions in water or the irrigation of a heap, while working in a large scale.

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Heap bioleaching of chalcopyrite: A review

Application of chalcopyrite bioleaching in heap/dump leach processes can potentially result in lower cost and reduced environmental impact in copper production.

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Feasibility study on heap bioleaching of chalcopyrite

31-08-2013  However, industrial leaching rate of chalcopyrite heap bioleaching is lower. This paper described the development status and industrial test of chalcopyrite heap bioleaching technology. The reasons for the lower efficiency of chalcopyrite heap bioleaching were analyzed. The strategies for successful chalcopyrite heap bioleaching were proposed.

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Demonstration of High Temperature Heap Bioleaching of ...

Demonstration of High Temperature Heap Bioleaching of Chalcopyrite Copper Ore It is a worldwide phenomenon that, as copper mines are getting deeper, more sulfidic ore is encountered. Furthermore, the average grade of reserves and unexploited deposits is dropping. Acid heap leaching has been widely used to extract copper from

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CN1509341A - Method for bacterially assisted

A method for the bacterially assisted heap leaching of chalcopyrite, the method characterised by the steps of: providing a chalcopyrite containing ore heap to oxidise sulphide minerals therein, the heap containing and/or being inoculated with a sulphide oxidising bacterial culture that either does not oxidise ferrous to ferric, or is inefficient at doing so; providing at least a first leach ...

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Processing of chalcopyrite ore by heap leaching

Heap bioleaching of low grade chalcopyrite (CuFeS2) was carried out in 1000 tons scale over a time period of 383 days. Bacterial solution was prepared and re‐circulated in specially designed ...

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Heap bioleaching of chalcopyrite : A review

Abstract Bioleaching is an emerging technology with significant potentials to add value to the mining industries so as to deliver attractive environmental and social benefits to all the associates. Chalcopyrite, CuFeS 2 , is the most important copper-bearing mineral in the world and unlike many other ores it is known to be recalcitrant to hydrometallurgical processing.

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Heap bioleaching of low grade chalcopyrite ores

Heap bioleaching of low grade chalcopyrite ... A process flowsheet was developed to recover copper metal from the lean sulfide ore of copper usig heap bioleaching,Solvent extraction and ...

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Demonstration of High Temperature Heap Bioleaching of ...

Demonstration of High Temperature Heap Bioleaching of Chalcopyrite Copper Ore It is a worldwide phenomenon that, as copper mines are getting deeper, more sulfidic ore is encountered. Furthermore, the average grade of reserves and unexploited deposits is dropping. Acid heap leaching has been widely used to extract copper from

More

Thermophilic Bioleaching of Chalcopyrite Concentrates with.

GeoBiotics, LLC has embarked on an extensive program to develop the GEOCOAT bioleaching system to chalcopyrite ores. This program encompasses mathematical heap modeling, laboratory amenability and column tests, and large-scale field trials. The GEOCOAT process involves the coating of

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Studies on thermophilic bioleaching of

In a series of studies, various aspects of thermophilic bioleaching of chalcopyrite minerals and concentrates have been analyzed. Although the main objective was the elucidation of the catalytic effect of thermophiles in leaching chalcopyrite, various other new findings contributed to a better understanding of interactions among chemical, physicochemical and biological factors, which influence ...

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Potential for solar thermal energy in the heap

Abstract 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.

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CN100513599C - Method for bacterially assisted

A method for the bacterially assisted heap leaching of chalcopyrite, the method characterised by the steps of: providing a chalcopyrite containing ore heap to oxidise sulphide minerals therein, the heap containing and/or being inoculated with a sulphide oxidising bacterial culture that either does not oxidise ferrous to ferric, or is inefficient at doing so; providing at least a first leach ...

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AUPQ045699A0 - An improved method for heap

chalcopyrite improved heap leaching heap leaching Prior art date 1999-05-19 Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status

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

refined and modified during the test heap programme. During chalcopyrite heap bioleaching, higher aeration rates are required than are customary for secondary sulphide ores, due to the requirement for pyrite conversion. During secondary sulphide heap bioleaching, it is necessary only to convert the sulphur species associated with copper. Column

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Studies on Thermophilic Bioleaching of

Although the main objective was the elucidation of the catalytic effect of thermophiles in leaching chalcopyrite, various other new findings contributed to a better understanding of interactions among chemical, physicochemical and biological factors, which influence the bioleaching of chalcopyrite

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Heap bioleaching of low grade chalcopyrite ores

Heap bioleaching of low grade chalcopyrite ... A process flowsheet was developed to recover copper metal from the lean sulfide ore of copper usig heap bioleaching,Solvent extraction and ...

More

Studies on thermophilic bioleaching of

In a series of studies, various aspects of thermophilic bioleaching of chalcopyrite minerals and concentrates have been analyzed. Although the main objective was the elucidation of the catalytic effect of thermophiles in leaching chalcopyrite, various other new findings contributed to a better understanding of interactions among chemical, physicochemical and biological factors, which influence ...

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A TWO-DIMENSIONAL MODEL FOR THE HEAP BIOLEACHING OF ...

A two-dimensional (2D) model of the heap bioleaching of chalcocite and pyrite is given, which accounts for the placement of spargers inside the heap. The 3-phase finite volume computational fluid dynamics model accounts for the transport of air, liquid and heat in the heap, in addition to the reaction of chalcocite and pyrite in the solid, and

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CN100513599C - Method for bacterially assisted

A method for the bacterially assisted heap leaching of chalcopyrite, the method characterised by the steps of: providing a chalcopyrite containing ore heap to oxidise sulphide minerals therein, the heap containing and/or being inoculated with a sulphide oxidising bacterial culture that either does not oxidise ferrous to ferric, or is inefficient at doing so; providing at least a first leach ...

More

AUPQ045699A0 - An improved method for heap

chalcopyrite improved heap leaching heap leaching Prior art date 1999-05-19 Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status

More

Potential for solar thermal energy in the heap

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.

More

Comparison of chalcopyrite bioleaching after different ...

now, industrial application for bioleaching, however, is dedicated mainly to copper extraction from secondary copper sulfide ore. Heap bioleaching of chalcopyrite is a developing technology and there are many difficulties to overcome. Many efforts have been developed to improve its bioleaching performance by optimizing the bioleaching

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Modeling of Thermal Effect of Chemical

In this study, typical ores used for heap bioleaching of chalcopyrite are theoretically analyzed to explore the mechanism involving the thermal effect of chemical reactions. The thermal distribution is compared between different proportional combinations.

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Studies on Thermophilic Bioleaching of

Although the main objective was the elucidation of the catalytic effect of thermophiles in leaching chalcopyrite, various other new findings contributed to a better understanding of interactions among chemical, physicochemical and biological factors, which influence the bioleaching of chalcopyrite

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Bioleaching: Extraction of Metals by

heap bioleaching The first step is dumping of metal ores n larger heaps named as leaching heaps , then inoculum of bacteria such as thiobacillius species are showered on the ores, the bacteria grow and the water is collected from bottom to recover metal and liquor is collected in oxidation ponds (reused).

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Heap bioleaching of low grade chalcopyrite ores

Heap bioleaching of low grade chalcopyrite ... A process flowsheet was developed to recover copper metal from the lean sulfide ore of copper usig heap bioleaching,Solvent extraction and ...

More

AUPQ045699A0 - An improved method for heap

chalcopyrite improved heap leaching heap leaching Prior art date 1999-05-19 Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status

More

CN100513599C - Method for bacterially assisted

A method for the bacterially assisted heap leaching of chalcopyrite, the method characterised by the steps of: providing a chalcopyrite containing ore heap to oxidise sulphide minerals therein, the heap containing and/or being inoculated with a sulphide oxidising bacterial culture that either does not oxidise ferrous to ferric, or is inefficient at doing so; providing at least a first leach ...

More

Potential for solar thermal energy in the heap

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.

More

Potential for solar thermal energy in the heap

Abstract 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.

More

Heap Bioleaching Pushing the Envelope Draft

chalcopyrite ores, it is increasingly becoming a target for heap bio-leaching research and development programs. Satellite dump leaching operations have been operated in the past, but copper recoveries have been low and leach kinetics very slow, possibly due to an accumulation of reaction products at the mineral surfaces.

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Method for the bacterially assisted heap leaching

A method for the bacterially assisted heap leaching of chalcopyrite includes providing a chalcopyrite containing ore heap to oxidize sulphide minerals therein, the heap containing and/or being inoculated with a sulphide oxidizing bacterial culture that either does not oxidize ferrous to

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Enhancing gold recovery by bioleaching of

Enhancing gold recovery by bioleaching of chalcopyrite low grade ore

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Dissolution and Passivation of Chalcopyrite during ...

The passivation mechanism of chalcopyrite during bioleaching at low temperature and the expression of the critical iron- and sulfur-oxidation genes during bioleaching were analyzed. The present work would provide further insights into the dissolution and passivation of chalcopyrite and the metabolism of a cold-adapted acidophile during bioleaching.

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Bioleaching - Wikipedia

Bioleaching is the extraction of metals from their ores through the use of living organisms. This is much cleaner than the traditional heap leaching using cyanide. Bioleaching is one of several applications within biohydrometallurgy and several methods are used to recover copper, zinc, lead, arsenic, antimony, nickel, molybdenum, gold, silver, and cobalt.

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