A Review on the Research of Hydrometallurgical Leaching of …
Zeng WM, Qiu GZ (2010) Development of heap bioleaching of copper sulphide ores. Metal Mine 8:102–107. Google Scholar Govender E, Bryan CG, Harrison STL (2015) A novel experimental system for the study of microbial ecology and mineral leaching within a simulated agglomerate-scale heap bioleaching system. Biochem Eng J …
Low-grade chalcopyrite ore, heap leaching or smelting …
The pilot test results confirm the generation of a Cu concentrate of a grade range 23.3–19.6% Cu with a copper recovery in the range 90.9–78.1%. For the hydrometallurgical treatment, bio heap leaching of 40,000 t of low-grade ore using agglomeration and aeration was proven to achieve a copper recovery of 32.6% for the …
Dissolution and Passivation of Chalcopyrite during …
A ‐ 6, chalcopyrite bioleaching by strain YL15 at 6 °C; A ‐ 28, chalcopyrit e bioleaching by . ... moderately thermophilic species in an indus trial copper heap bioleaching ...
Minerals | Free Full-Text | Industrial Heap Bioleaching of Copper
Sulfuric acid solution containing ferric iron is the extractant for industrial heap bioleaching of copper sulfides. To start a heap bioleaching plant, sulfuric acid is usually added to the irrigation solution to maintain adequate acidity (pH 1.0–2.0) for copper dissolution. An industrial practice of heap bioleaching of secondary copper sulfide ore …
Heap bioleaching of chalcopyrite: A review | Request PDF
Heap bioleaching has been applied for the first time at the beginning of the 1890s for copper (0.75% Cu grade) extraction at the Rio Tinto mines in Spain (Acevedo 2002;Brandl 2001;Natarajan 2018
Comparison of chalcopyrite bioleaching after different …
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. The …
Simulation of Bioleaching Heat Effects for Enhancement of …
A number of heap bioleaching models developed before have been reviewed. Among the significant processes that occur in a bioheap are the heat generation and conservation. An analysis of heat conservation for copper sulfide heap leaching has been accomplished with the aid of a computer model. Such analysis is carried out for …
Unravelling the Complexity of Heap Bioleaching
Abstract: Heap and dump leaching of sulphide minerals have become well-established techniques for the processing of low grade ores, especially of copper, over the past 30 years. The oxidative dissolution of sulphides in heaps can be significantly enhanced by microbial colonies, but the complexities of the heap leach process overall often ...
Bioleaching
Bioleaching of Zinc, Nickel, and Cobalt. K.A. Natarajan, in Biotechnology of Metals, 2018 Abstract. Bioleaching principles, mechanisms, and applications for extraction of zinc, nickel, and cobalt are illustrated. Recent commercially relevant developments in the biohydrometallurgy of zinc are discussed with respect to BRISA, HydroZinc, heap …
Bioleaching of Zn from sphalerite using
Bacterial-assisted leaching (bioleaching) has been proven to be ecofriendly and the most cost-effective option to the traditional procedures without making use of sulfur dioxide that follows as by-product in traditional methods and causes environmental issues [7,8,9]. Bioleaching can be applied for extracting Zn from sphalerite.
Current scenario of chalcopyrite bioleaching: a …
In the current scenario, heap bioleaching is the most advanced and preferred eco-friendly technology for processing of low grade, uneconomic/difficult-to-enrich ores for copper …
Presentation on mechanisms and applications of …
Currently heap leaching accounts approximately for 20% of the worldwide copper production and an estimated about one fifth of the world's copper produced from run-of-mine and crushed ores through bioleaching heap can be reached. In the process of the heap bioleaching and mineral biooxidation, the ores and minerals, which are pretreated …
Heap bioleaching of chalcopyrite : A review
Abstract: This review presents developments and applications in bioleaching and mineral biooxidation since publication of a previous mini review in 2003 (Olson et al. Appl Microbiol Biotechnol 63:249–257, 2003). There have been discoveries of newly identified acidophilic microorganisms that have unique characteristics for effective …
Heap bioleaching of chalcopyrite: A review
Dynamic of active microorganisms inhabiting a bioleaching industrial heap of low-grade copper sulfide ore monitored by real-time PCR and oligonucleotide prokaryotic acidophile microarray. 2009 • mauricio acosta. Download Free PDF View PDF.
How does bio heap leaching work? | ResearchGate
The stages for bio heap leaching can be described as: 1.Ground Preparation and pad construction: Here the soil on a slightly sloping ground is compacted and covered by an impermeable pad (can be ...
Heap bioleaching of chalcopyrite: A review
Heap leaching deals with the newly mined/run-off-the-mine (ROM) materials (intermediate grade oxides and secondary sulfides) deposited in the form of a heap on an …
Current scenario of chalcopyrite bioleaching: A …
It is believed that heap bioleaching will always be a preferred route in the future for processing the low grade chalcopyrite ores. It is now known that heap …
Frontiers | Bioleaching of Chalcopyrite Waste Rock in …
Heap bioleaching, the solubilization of metal ions from metal sulfides by microbial oxidation, is often combined with solvent extraction (SX) and electrowinning to recover, e.g., copper from low-grade ores. After …
Bioleaching of a low-grade copper ore, linking leach …
Introduction. Increasingly, the mining industry is faced with the need to process low-grade ores using low-cost technology to meet world demand for copper. Heap and dump leaching tend to be the technologies of choice for low-grade secondary copper sulfide ores and, to a much less extent, primary copper sulfide ores such as chalcopyrite (Domic ...
Silicate mineral dissolution during heap bioleaching
Column bioleaching of the complex sulfide ore was carried out at various temperatures (7-50 degrees C) and pH values (1.5-3.0). Column leaching at pH 1.5 and 2.0 resulted in increased acid consumption rates and silicate dissolution such that it became difficult to filter the leach solutions and for the leach liquor to percolate through the column.
Potential for solar thermal energy in the heap bioleaching of
2.1. Heap model. The heap was modelled using the HeapSim Heap Bioleach Simulation tool developed by Petersen and Dixon (2007a) and is a comprehensive mathematical model of the sub-processes that occur within a heap during bioleaching. The model simulates the reactions occurring in the heap at each different scale of the process …
Leaching of chalcopyrite and sphalerite using bacteria
The identification of microbes with a leaching temperature range of 30–50. °C (moderate thermophiles) increases the likelihood of these isolates being applied in both bioleaching and environmental applications.. The flexibility in their growth temperature makes them ideal candidates for use in heap leaching where temperature regulation is …
Producing Copper Nature's Way: Bioleaching
Three of the processes introduced above have made great strides in solving these problems for the extraction of copper from chalcopyrite: The GEOCOAT™ Process - A heap leaching process that is capable of bioleaching copper concentrates. It does this by coating the concentrate slurry onto a support rock, or substrate material, and stacking this coated …
Intensified bioleaching of chalcopyrite by communities with …
The increase of internal heap temperature during bioleaching improves the rate of chalcopyrite dissolution. However, it also negatively affects CO 2 and O 2 availability, consequently the microbial community changes and only the best adapted microorganisms are capable of growing under the limiting conditions. In this work we attempt to ...
A model for heap bioleaching of chalcocite with heat …
The heap bioleaching process takes place in the presence of bacteria, occurring either naturally or seeded in the applied liquid. In real heap bioleaching operations, many different types of bacteria exist (Readett et al., 2003), some of which may oxidize iron(II) or elemental sulfur. Further, the bacteria in a heap have various …
Bioleaching of copper from pre and post thermally activated …
Bioleaching of a low grade chalcopyrite (ball mill spillage material) was tested for copper recovery in shake flasks. The original samples (as received) were thermally activated (600°C, 30 min) to notice the change in physico-chemical and mineralogical characteristics of the host rock and subsequently its effect on copper …
Processing of chalcopyrite ore by heap leaching and …
Section snippets Ore sample description. Chalcopyrite ore was obtained from the Quebrada Blanca mine in northern Chile. The ore contained 0.52% copper, with > 95% of that copper being present as chalcopyrite.Prior to use, the ore was crushed to − 13 mm, resulting in a P 80 of 11.4 mm and a fines (− 150 μm) content of 4%. Table 1 details the …
Insights into heap bioleaching of low grade chalcopyrite …
A heap bioleaching unit with 1000 tons heap of low grade ore material, a BACFOX tank for growth of micro‐organisms, facility for air sparging and lixiviant sprinkling to heap surfaces as shown in Fig. 1 were setup at MCP. The plant was setup near dump yard where the low grade ore was stored. The following sections details the construction …
Bioleaching of Chalcopyrite Waste Rock in the …
Heap bioleaching, the solubilization of metal ions from metal sulfides by microbial oxidation, is often combined with solvent extraction (SX) and electrowinning to …
(PDF) Current scenario of chalcopyrite bioleaching: A review …
Dynamic of active microorganisms inhabiting a bioleaching industrial heap of low-grade copper sulfide ore monitored by real-time PCR and oligonucleotide prokaryotic acidophile microarray. 2009 • mauricio acosta. Download Free PDF View PDF. Minerals. A Sustainable Bioleaching of a Low-Grade Chalcopyrite Ore.
