heap bioleaching of chalcopyrite
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heap bioleaching of chalcopyrite

Heap bioleaching of chalcopyrite: A review - ScienceDirect

Apr 01, 2008  Equipment flow diagram for heap bioleaching of chalcopyrite ore. 3. Heap bioleachingIn 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.

Heap bioleaching of chalcopyrite: A review - ScienceDirect

The main hindrance to the commercial application of biohydrometallurgical processing of chalcopyrite is its slow rate of dissolution. 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 ...

Heap bioleaching of chalcopyrite: A review Request PDF

Request PDF Heap bioleaching of chalcopyrite: A review Bioleaching is an emerging technology with significant potentials to add value to the mining industries so as to deliver attractive ...

Thermophilic Bioleaching of Chalcopyrite Concentrates with.

Thermophilic Bioleaching of Chalcopyrite Concentrates ... the heap is a natural insulator so target operating temperatures are easily maintained, solutions can be recycled to enhance the PLS grade, simple operation means lower staffing and training levels,

Current scenario of chalcopyrite bioleaching: A review on ...

Nov 01, 2015  Heap bioleaching of the primary sulfide i.e. chalcopyrite is yet to be commercialized and it is currently studied at a pilot or demonstration scale (Panda et al., 2012a, Panda et al., 2012b). In an extensive review, Pradhan et al. (2008) have discussed several factors that influence heap bioleaching performance of chalcopyrite. The following ...

Insights into heap bioleaching of low grade chalcopyrite ...

Aug 01, 2012  Highlights Heap bioleaching of low grade chalcopyrite was carried out at 1000 tons scale. An average of 0.14% per day copper was extracted from the heap bioleaching unit. Frequency of solution transfer and acid concentration affected copper extraction. Less significant parameters are aeration and inoculum addition. Prolonged recirculation of bacterial lixiviant yields to lower copper ...

Feasibility study on heap bioleaching of chalcopyrite

Aug 31, 2013  Bioleaching of chalcopyrite often encountered the formation of passivation layer, which inhibited the leaching process and resulted in a low leaching rate. This inhibitory effect can be eliminated by thermophilic bioleaching. The industrial test of BioCOP technology based on thermophiles was successfully completed, which confirmed the feasibility of chalcopyrite bioleaching.

Potential for solar thermal energy in the heap bioleaching ...

Jan 01, 2017  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.

Processing of chalcopyrite ore by heap leaching and flotation

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 ...

Heap Bioleaching Pushing the Envelope Draft

the treatment of low grade chalcopyrite by heap bio-leaching. They have announced ... accelerate the application of heap bioleaching to refractory gold ores. The future could also see commercialisation of heap bio-leaching technology for other metals such as zinc and cobalt.

Feasibility study on heap bioleaching of chalcopyrite ...

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

Feasibility study on heap bioleaching of chalcopyrite

Bioleaching of chalcopyrite often encountered the formation of passivation layer, which inhibited the leaching process and resulted in a low leaching rate. This inhibitory effect can be eliminated by thermophilic bioleaching. The industrial test of BioCOP technology based on thermophiles was successfully completed, which confirmed the feasibility of chalcopyrite bioleaching.

Thermophilic heap leaching of a chalcopyrite concentrate ...

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 ...

Studies on Thermophilic Bioleaching of Chalcopyrite toward ...

Studies on Thermophilic Bioleaching of Chalcopyrite toward Heap Application. Article Preview. Abstract: 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 ...

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

Thermophilic Bioheap Leaching of Chalcopyrite

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.

Potential for solar thermal energy in the heap bioleaching ...

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.

Heap Bioleaching Pushing the Envelope Draft

the treatment of low grade chalcopyrite by heap bio-leaching. They have announced ... accelerate the application of heap bioleaching to refractory gold ores. The future could also see commercialisation of heap bio-leaching technology for other metals such as zinc and cobalt.

Minerals Free Full-Text Heap Leaching: Modelling and ...

Different strategies for heap bioleaching of chalcopyrite are studied by . Panda et al. [ 57 ] provide a review on chalcopyrite leaching with particular emphasis on heap bioleaching. A brief introduction to the modelling of bioleach processes is given by Petersen [ 58 ] and Gebhardt et al. [ 59 ] give an overview of the leach kinetics of ...

Heap Bioleaching Scientific.Net

Modeling of Thermal Effect of Chemical Reactions in Heap Bioleaching of Chalcopyrite Authors: Zhen Yi Zhang, Chihiro Inoue, Taro Kamiya, Xuan Zhao Abstract: Heap bioleaching is regarded as an environmental-friendly technology to extract valuable metals, such as gold, silver, copper, etc., from low grade or waste ores.

Recovery of copper values from bio-heap leaching of low ...

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 ...

Thermophilic Heap LEaching of a Chalcopyrite Concentrate.d.

Bioleaching of sulphide minerals has become fairly well established technology and is widely applied in base metal extraction and pre-treatment of refractory gold ores (Brierley and Brierley, 1999). ... GEOCOAT™ process may therefore also be advantageous in terms of operating a thermophile chalcopyrite heap leach. 3

Chalcopyrite Leaching - Metallurgist Mineral Processing ...

Jun 09, 2017  Leaching Chalcopyrite is the holy grail for hydrometallurgists (Leachers), difficult to leach as the sulfur forms a layer over the mineral and makes the leaching slow. Having said that, it is not 100% not leachable, not unusual for ore dumps (low grade) containing chalcopyrite to be placed under leach but report low recovery +/-30% TCu over several years and the rate is around 0.5-1% per month.

A TWO-DIMENSIONAL MODEL FOR THE HEAP

chalcocite heap bioleaching (Dixon, 2000), zinc sulphide heap bioleaching (Dixon and Petersen, 2004), thermophilic column bioleaching of chalcopyrite concentrates (Petersen and Dixon, 2002), and pyrite heap bioleaching (Ritchie, 1997). However, these studies contain little analysis of

Thermophilic Heap LEaching of a Chalcopyrite Concentrate.d.

Bioleaching of sulphide minerals has become fairly well established technology and is widely applied in base metal extraction and pre-treatment of refractory gold ores (Brierley and Brierley, 1999). ... GEOCOAT™ process may therefore also be advantageous in terms of operating a thermophile chalcopyrite heap leach. 3

Potential for solar thermal energy in the heap bioleaching ...

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.

Minerals Free Full-Text Heap Leaching: Modelling and ...

Different strategies for heap bioleaching of chalcopyrite are studied by . Panda et al. [ 57 ] provide a review on chalcopyrite leaching with particular emphasis on heap bioleaching. A brief introduction to the modelling of bioleach processes is given by Petersen [ 58 ] and Gebhardt et al. [ 59 ] give an overview of the leach kinetics of ...

Heap Bioleaching Pushing the Envelope Draft

the treatment of low grade chalcopyrite by heap bio-leaching. They have announced ... accelerate the application of heap bioleaching to refractory gold ores. The future could also see commercialisation of heap bio-leaching technology for other metals such as zinc and cobalt.

A TWO-DIMENSIONAL MODEL FOR THE HEAP

chalcocite heap bioleaching (Dixon, 2000), zinc sulphide heap bioleaching (Dixon and Petersen, 2004), thermophilic column bioleaching of chalcopyrite concentrates (Petersen and Dixon, 2002), and pyrite heap bioleaching (Ritchie, 1997). However, these studies contain little analysis of

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

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

Modeling and Optimization of Heap Bioleach Processes ...

Petersen J, Dixon DG (2003) The dynamics of chalcocite heap bioleaching. In: Young C, Alfantazi A, Anderson C, James A, Dreisinger DB, Harris B (eds) Hydrometallurgy 2003, proceedings of the 5th international symposium honoring Professor Ian M. Ritchie, vol 1: leaching and solution purification.

Chalcopyrite Leaching - Metallurgist Mineral Processing ...

Jun 09, 2017  Leaching Chalcopyrite is the holy grail for hydrometallurgists (Leachers), difficult to leach as the sulfur forms a layer over the mineral and makes the leaching slow. Having said that, it is not 100% not leachable, not unusual for ore dumps (low grade) containing chalcopyrite to be placed under leach but report low recovery +/-30% TCu over several years and the rate is around 0.5-1% per month.

US8012238B2 - High temperature heap bioleaching process ...

The heap is inoculated with a thermophilic microorganism, and bioleaching is carried out so that sufficient sulfide mineral particles in the heap are biooxidized to oxidize at least 10 Kg of sulfide sulfur per tonne of solids in the heap and to cause the dissolution of at least 50% of the copper in the heap in a relatively short period of time.

Bioleaching Research Papers - Academia

The bioleaching of chalcopyrite is a major challenge due to slow copper leach kinetics and poor copper extractions. Bioleaching tests were carried out in bench-scale piloting facilities, comprising fully controlled multi-stage continuously operated reactor systems using moderate thermophile and thermophile consortia under both uncontrolled and ...

EP1713942B1 - Heap bioleaching process - Google Patents

EP1713942B1 EP05726181A EP05726181A EP1713942B1 EP 1713942 B1 EP1713942 B1 EP 1713942B1 EP 05726181 A EP05726181 A EP 05726181A EP 05726181 A EP05726181 A EP 05726181A EP 1713942 B1 EP1713942 B1 EP 1713942B1 Authority EP European Patent Office Prior art keywords heap carbon temperature microbial heat Prior art date 2004-01-30 Legal status (The

Simulation of Bioleaching Heat Effects for Enhancement of ...

Apr 24, 2014  A heat-transfer model was formulated to determine the distribution of temperature within a bioheap of chalcopyrite of Sarcheshmeh copper mine. Bioleaching employs mixed mesophilic and thermophilic microbes for Cu extraction. Thermophiles are better than mesophiles to dissolve CuFeS2. The solution irrigation and aeration rates were taken into account as the main operational factors.

Bioleaching: Extraction of Metals by Microorganisms ...

Jun 01, 2020  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).. Heap bioleaching includes the use of many heap plants such as stacker,

Heap Bioleaching Fundamentals - MINTEK MINTEK

Heap bioleaching of refractory chalcopyrite ores is being investigated by a few organisations, and Mintek is playing a prominent role in this area. Mintek has devised trade-marked column leaching apparatus (SmartColumn™) for the simulation of the natural temperature profile development in pyrite-containing heaps, as part of research into ...

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