Bacterial heap-leaching: Practice in Zijinshan copper mine

Руан, Ренман; Wen, Jiankang; Chen, Jinghe

doi:10.1016/j.hydromet.2006.03.048

Cited by 57 publications

(17 citation statements)

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“…Zijinshan copper mine, located in Shanghang County, Fujian Province, was the first commercial plant of bio-heap leaching with a capacity of 10,000 t Cu/a in China [10]. The leachate used for study was collected from the collecting pool of this plant.…”

Section: Site Description and Dna Extractionmentioning

confidence: 99%

Application of clone library analysis and real-time PCR for comparison of microbial communities in a low-grade copper sulfide ore bioheap leachate

Chen

Liu

et al. 2009

J Ind Microbiol Biotechnol

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The microbial communities of leachate from a bioleaching heap located in China were analyzed using the 16S rRNA gene clone library and real-time quantitative PCR. Both methods showed that Leptospirillum spp. were the dominant bacteria, and Ferroplasma acidiphilum were the only archaea detected in the leachate. Clone library results indicated that nine operational taxonomic units (OTUs) were obtained, which fell into four divisions, the Nitrospirae (74%), the gamma-Proteobacteria (14%), the Actinobacteria (6%) and the Euryarchaeota (6%). The results obtained by real-time PCR in some ways were the same as clone library analysis. Furthermore, Sulfobacillus spp., detected only by real-time PCR, suggests that real-time PCR was a reliable technology to study the microbial communities in bioleaching environments. It is a useful tool to assist clone library analysis, to further understand microbial consortia and to have comprehensive and exact microbiological information about bioleaching environments. Finally, the interactions among the microorganisms detected in the leachate were summarized according to the characteristics of these species.

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Section: Site Description and Dna Extractionmentioning

confidence: 99%

Application of clone library analysis and real-time PCR for comparison of microbial communities in a low-grade copper sulfide ore bioheap leachate

Chen

Liu

et al. 2009

J Ind Microbiol Biotechnol

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“…Heap leaching is one of the most high-ranking and applicable hydrometallurgical methods extracting copper from its ores which is mainly employed for any types of oxide ores and copper sulfides in industrial and semi-industrial ranges (Brierley et al, 2001;Renman et al, 2006;Sukla et al, 2009). It is very significant to fathom the mechanisms of heap leaching and also their influence on economy (Padilla et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

Determining the Optimum Cut-Off Grades in Sulfide Copper Deposits / Określanie Optymalnej Wartości Odcięcia Zawartości Procentowej Pierwiastka Użytecznego W Złożach Siarczku Miedzi

Rahimi¹,

Oraee²,

Shafahi³

et al. 2015

Archives of Mining Sciences

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Optimum cut-off grades determination in mining life affects production planning and ultimate pit limit and it is also important from social, economical and environmental aspects. Calculation of optimum cut-off grades has been less considered for mines containing various mineral processing methods. In this paper, an optimization technique is applied to obtain optimum cut-off grades for both concentration and heap leaching processes. In this technique, production costs and different recoveries of heap leaching method directed into modeling different annual cash flows in copper mines. Considering the governing constraints, the Lagrange multiplier method is practiced to optimize the cut-off grades in which the objective function is supposed to maximize Net Present Value. The results indicate the effect of heap leaching process on the optimum cut-off grades of primary and secondary sulfide deposits.Keywords: optimum cut-off grades, heap leaching, concentration, sulfide deposits Określanie optymalnego poziomu odcięcia dla zawartości procentowej pierwiastka użytecznego ma poważny wpływ na planowanie produkcji, określanie ostatecznych limitów zasobów złoża; jest to także ważna kwestia z punktu widzenia kwestii społecznych, ekonomicznych i środowiskowych. Obliczanie optymalnego poziomu odcięcia dla zawartości procentowej pierwiastka użytecznego nie było zwykle szeroko rozważane w przypadku kopalni prowadzących ciągły system przeróbki. W pracy tej przedstawiono technikę optymalizacji określania poziomu zawartości procentowej pierwiastka użytecznego z uwzględnieniem zarówno procesów koncentracji jak i ługowania. W metodzie uwzględniono koszty produkcji i różne wskaźniki odzysku rudy, wielkości te wykorzystane zostały do modelowania rocznych przepływów gotówki w kopalniach miedzi. Uwzględniając narzucone ograniczenia, zastosowano metodę mnożników Lagrange'a w celu optymalizacji określania poziomu zawartości procentowej pierwiastka użytecznego, gdzie przyjętą funkcją celu jest maksymalizacja wartości bieżącej netto. Wyniki wskazują

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“…The production costs of this method are roughly less than other hydrometallurgical methods (Davenport et al 2002). Moreover, it facilitates the economical extraction of low-grade sulfide from copper deposits (Brierley and Brierley 2001;Renman et al 2006). This method is considered one of the mineral processing methods which are considered friendly in the aspect of environmental issues (Simpson et al 1998;Bell and Donnelly 2006;Wu et al 2008).…”

Section: Introductionmentioning

confidence: 99%

Considering environmental costs of copper production in cut-off grades optimization

et al. 2014

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The average grades of copper mines are dropped by extracting high-grade copper ores. This matter has drawn considerations to processing methods which not only extracts low-grade copper ores but also decreases adverse environmental impacts. Hydrometallurgical methods are the most applicable ones which affect the optimum policy of cut-off grades determination. In this research, an optimum cut-off grades modeling is developed with the objective function of net present value (NPV) maximization. The costs of processing methods and associated environmental costs are also involved in the model. Next, limiting and balancing cut-off grades of processing methods are calculated through Lagrange multiplier optimization method. Finally, an iteration algorithm is exercised to compute the maximum amount of NPV as well as concentration and leaching optimum cut-off grades. The results show that the concentration and leaching optimum cut-off grades policy makes an improvement on overall NPV by 35% in comparison with the traditional approaches of cut-off grades determination. The adverse environmental impacts of low-grade ores dumping are also reduced by using hydrometallurgical methods

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Bacterial heap-leaching: Practice in Zijinshan copper mine

Cited by 57 publications

References 0 publications

Application of clone library analysis and real-time PCR for comparison of microbial communities in a low-grade copper sulfide ore bioheap leachate

Application of clone library analysis and real-time PCR for comparison of microbial communities in a low-grade copper sulfide ore bioheap leachate

Determining the Optimum Cut-Off Grades in Sulfide Copper Deposits / Określanie Optymalnej Wartości Odcięcia Zawartości Procentowej Pierwiastka Użytecznego W Złożach Siarczku Miedzi

Considering environmental costs of copper production in cut-off grades optimization

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