Column leaching of low-grade sulfide ore from Zijinshan copper mine

Zou, Gang; Papirio, Stefano; Lai, Xiaokang; Wu, Zengling; Zou, Laichang; Puhakka, Jaakko A.; Руан, Ренман

doi:10.1016/j.minpro.2015.04.005

Cited by 15 publications

(7 citation statements)

References 30 publications

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“…oxidation of sulphide minerals(Zou et al, 2015;Liu et al, 2016a) and enhance chalcocite, digenite and covellite leaching(Bolorunduro, 1999;Ruan et al, 2013). The high pyrite fraction also releases heat and sulphuric acid and iron (50 g/L) once it is oxidised(Ruan et al, 2006;Liu et al, 2010;Ruan et al, 2011Ruan et al, , 2013;Zou et al, 2015).Microbial genera present in the Zijinshan copper mine and solution ponds are identified as Acidithiobacillus (such as A. thiooxidans, A. albertensis and A. caldus, these are major sulphur oxidisers), Leptospirillum (ferrous oxidisers), Sulfobacillus, Acidiphilium and Ferrimicrobium Liu et al (2010Liu et al ( , 2016a. discussed this aspect in detail.…”

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“…more Leptospirillum strain at the outer and lower sites of the heap and in the leaching solution, while greater Acidithiobacillus strain inside the heap and close to the top surface) significantly help in long term incubation of the heap bio-leaching process(Liu et al, 2010;Ruan et al, 2011). They control pyrite and ferrous oxidation, which results in high heap temperatures and ferric ions within the system, resulting in high leaching efficiencies(Zou et al, 2015). In addition, life cycle assessment studies indicated energy saving and improved environmental impact at Zijinshan copper mine compared to conventional flotation followed by smelting(Ruan et al, 2011).…”

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confidence: 99%

“…Since pyrite leaching typically contributes to ferric ions, bioaugmentation of microorganisms in the heap can be applied for controlling pyrite leaching(Zhang et al, 2014) Ruan et al (2011Ruan et al ( , 2013. indicated that the excessive iron in the solution was removed by jarosite formation, but this is limited at low pH values(Zou et al, 2015). Jarosite formation could also reduce the heap permeability and the contact between the extractant and mineral grains and thus negatively affect the leaching efficiency.…”

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confidence: 99%

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The current state and future directions of percolation leaching in the Chinese mining industry: Challenges and opportunities

Ilankoon

Tang

Ghorbani

et al. 2018

Minerals Engineering

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China is one of the most rapidly growing economies in the world and this growth is underpinned by growing demand for natural resources to meet base and precious metals and energy requirements. Even though China is currently the largest producer of several mined commodities, such as gold and the rare earth elements, meeting the future demands for metal consumption will require China to either develop new mining projects or increase material imports. In terms of nuclear energy requirements the country still depends on uranium imports. To meet this growth in Chinese demand, there has been a strong interest in technologies suited for mining and processing of low grade ore bodies. Percolation leaching methods have been very effective in extracting metals from low grade ores, which could not otherwise be economically extracted. Percolation leaching techniques, such as heap leaching, dump leaching, bio-leaching and in-situ leaching have been extensively employed in the Chinese mining industry in recent decades to primarily extract gold, copper, rare earth elements and uranium. This paper discusses the application of various percolation leaching techniques in the Chinese mining industry and offers a scientific and extensive literature overview on technology developments in commercial percolation leaching operations in China. It also presents the current challenges of percolation leaching and recent technological and research developments and regulatory frameworks pertaining to the application of percolation leaching in China. The future directions of percolation leaching in the Chinese mining industry will also be presented to extract the low grade natural resources both economically and in an environmentally sustainable manner.

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The current state and future directions of percolation leaching in the Chinese mining industry: Challenges and opportunities

Ilankoon

Tang

Ghorbani

et al. 2018

Minerals Engineering

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“…The deposit contains copper sulfide ore of the chalcocite variety with a content of about 1% copper. A large number of studies have also been conducted on the Zijinshan copper mine (Liu et al, 2016;Wu et al, 2016;Zou et al, 2015). The Zijinshan copper mine is the largest secondary copper-sulfide mine in China.…”

Section: Introductionmentioning

confidence: 99%

Bacterial and chemical leaching of copper-containing ores with the possibility of subsequent recovery of trace silver

et al. 2019

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“…By this technology, the leaching time can be shortened and the recovery of minerals can be improved and the production costs can be reduced. This technology has been used in the production [2,3] or is still in the laboratory research stage [4]. Leaching in columns simulates percolation leaching because the conditions are very similar to those in the heap [5].…”

Section: Introductionmentioning

confidence: 99%

Continued Multicolumns Bioleaching for Low Grade Uranium Ore at a Certain Uranium Deposit

Chen

Sun

Liu

2016

Journal of Nanomaterials

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Bioleaching has lots of advantages compared with traditional heap leaching. In industry, bioleaching of uranium is still facing many problems such as site space, high cost of production, and limited industrial facilities. In this paper, a continued column bioleaching system has been established for leaching a certain uranium ore which contains high fluoride. The analysis of chemical composition of ore shows that the grade of uranium is 0.208%, which is lower than that of other deposits. However, the fluoride content (1.8% of weight) is greater than that of other deposits. This can be toxic for bacteria growth in bioleaching progress. In our continued multicolumns bioleaching experiment, the uranium recovery (89.5%) of 4th column is greater than those of other columns in 120 days, as well as the acid consumption (33.6 g/kg). These results indicate that continued multicolumns bioleaching technology is suitable for leaching this type of ore. The uranium concentration of PLS can be effectively improved, where uranium recovery can be enhanced by the iron exchange system. Furthermore, this continued multicolumns bioleaching system can effectively utilize the remaining acid of PLS, which can reduce the sulfuric acid consumption. The cost of production of uranium can be reduced and this benefits the environment too.

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Column leaching of low-grade sulfide ore from Zijinshan copper mine

Cited by 15 publications

References 30 publications

The current state and future directions of percolation leaching in the Chinese mining industry: Challenges and opportunities

The current state and future directions of percolation leaching in the Chinese mining industry: Challenges and opportunities

Bacterial and chemical leaching of copper-containing ores with the possibility of subsequent recovery of trace silver

Continued Multicolumns Bioleaching for Low Grade Uranium Ore at a Certain Uranium Deposit

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