Historical assessment of metal recovery potential from old mine
The purpose of this work is performing such assessments for old porphyry copper tailings from Chile in a reprocessing scenario by flotation, only based on specially developed theoretical concepts and available historical operation data as an economically efficient first step of a reprocessing or even remediation initiative. 2. Assessment approach
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Regionalized Life Cycle Inventories of Global Sulfidic Copper …
51 Declining copper grades in deposits might worsen this situation, as it implies more tailings 52 will have to be managed per kg of copper produced12. 53 Environmental disruption related to the tailings generation and deposition is 54 inevitable. Over time, poorly managed tailings can interact with the surroundings such as
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Carl R. Ice College of Engineering at K-State
For example, the SS bulk tailings contained 167 mg Cu/kg while the cleaned tailings contained 96 mg Cu/kg. By contrast, the high-grade concentrate contained 708 mg Cu/kg. This represents a 4.23 fold magnification of copper from the bulk tailings to the high-grade while the cleaned tailings exhibited copper levels 42% lower than the bulk tailings.
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Mineralogical characterization of copper sulfide tailings using
the reprocessing of Zn tailings [38]. Furthermore, several au-thors [39–40] have also applied MLA in the characterization of copper mine tailings, but they only identified the mineral composition and abundance of copper tailings. Wang and Wang [41] studied the dissemination state of copper in an old
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Prospective environmental assessment of reprocessing and …
Results indicate that reprocessing may save from 25 up to 930 kg CO 2-eq per tonne of treated copper tailings. Potential environmental benefits depend on the …
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Making Paving Stones from Copper Mine Tailings as Aggregates
In this study, copper mine tailings were used as aggregates for making cement–tailings and cement–gravel–sand–tailings mixtures to be used in the manufacture of paving stones for construction. The cement–tailings mixtures did not reach the strengths required for making paving stones. On the other hand, tailings aggregates show fines ...
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Past, Present, and Future of Copper Mine Tailings Governance in …
Some copper mining companies are starting to recover copper by reprocessing tailings and are evaluating the reprocessing of other metals that currently may not have an economic value but may be attractive resources in the future [11,20]. Therefore, considering recent studies on old tailings storage facilities, it is possible to …
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New Tailings Reprocessing Technology Has …
Several efforts are underway to extract gold and copper from tailings. Reprocessing mine tailings may also have environmental …
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Recent practices in mine tailings' recycling and reuse
Copper-rich tailings can be turned into lightweight ceramics by sintering iron tailings mixed with fly ash and sewage sludge in paint making. Tailings can be used as additives for soil in road construction in the construction industry. ... As mentioned above, the reprocessing of tailings as a primary input material in different sectors can ...
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Copper tailings reprocessing | Semantic Scholar
Copper tailings reprocessing. Damjan Hann. Published in Materials and Geoenvironment 10 January 2022. Engineering, Environmental Science, Materials Science. Abstract in English Copper is widely used in the modern world. An excellent conductor of electricity, it is used in the electrical industry, in the construction industry because of its …
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From Tailings to Treasure? Miners Make Money …
DRD Gold extracted 33,600 ounces of gold, worth nearly US$40 million, in the last quarter of 2013. Mintails, a mine tailings processor, has developed new technology to process 350,000 tons of …
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Toward sustainable reprocessing and valorization of sulfidic …
Copper tailings reprocessing can mitigate GHG emissions and toxicity impacts in 2050. Tailings reprocessing can supply up to 2 % of future European copper demand. Tradeoffs exist between climate change and ecotoxicity impacts for different …
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Recycling and Reuse of Mine Tailings: A Review of
studies, the suitability of copper ore tailings a s an additive mixture in concrete preparation was tested by replacing common Portland cem ent at different grades. Up to 20% is saved
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Decarbonisation to drive dramatic increase in mining …
Based on these assumptions, production of copper tailings is projected to increase from an annual rate of approximately 4.3 Gt/yr in 2020 to 16 Gt/yr in 2050 ... The S&P Global Capital IQ Pro database records 563 mining projects where tailings reprocessing is taking place, and 116 where waste rock processing is taking place. ...
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Preface to the Thematic Section: Mine Tailings: Problem or
To be able to corroborate the environmental and economic benefits of future tailings-reprocessing flow sheets based on the know-how developed in WP1–3, WP4 develops a novel environmental assessment methodology that is custom designed for tailings. ... As these tailings contain considerable amounts of copper and zinc, …
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Arizona State Mine Inspector
from reprocessing copper mine tailings would enhance US minerals, supply chain, and technology independence and help prevent shortages from hobbling Arizona's (or US) industries. • It will produce the state's first extensive assessment of the volume of copper mine tailings and what toxic/critical metals they contain.
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How to generate value from tailings with reprocessing to be future
In gold, copper sulfide and iron ore tailings, the potential of extracting minerals is an opportunity. Reprocessing tailings to collect the valuable minerals can be a cost-effective approach ...
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Evaluation of the possibility of copper recovery from tailings by
The present research aims at recovering copper by reprocessing of tailings at China Molybdenum Co. Ltd. (CMOC) from bench-scale to industrial tests. It focuses on the determination of the reagents' dosage and pulp concentration that enables to obtain the highest recovery of copper by flotation of the studied tailings. Based on the results of ...
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A review of circular economy strategies for mine tailings
In addition to the metals recovery from the tailings, also the mineral fraction in the tailings can be valuable. With reprocessing, the mine tailings can be modified to be utilized in high-value products. E.g. the recent article by Wong-Pinto et al. (2021) reports biosynthesis of copper nanoparticles from copper tailings. In addition, the ...
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Life cycle assessment of mine tailings management in Canada
Sulfidic copper tailings in the EU were selected as a case study. We perform prospective life cycle assessments of future reprocessing scenarios by considering emerging resource recovery technologies, market supply & demand forecasts, and energy system changes. ... The environmental performance of reprocessing of tailings is …
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Keeping Up with Demand: Copper Tailing Reprocessing
Recovering Copper and Reprocessing Tailings. In recent years, the need for efficient recovery, recycling and reuse strategies for waste streams to address climate change, environmental damage, and supply deficits has become clear to researchers and governments. Several technological solutions have been developed, and governments …
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Atlas of Australian Mine Waste puts secondary
The Atlas will build on an approach pioneered by The University of Queensland and the Geological Survey of Queensland's Secondary Prospectivity Project, which identifies sites for mine waste recycling across Queensland. "This project originally focused on the potential for cobalt in copper tailings in the Mount Isa area, before our ...
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Geosciences | Free Full-Text | Recycling and Reuse of Mine Tailings…
The increased reprocessing of copper tailings is becoming an increasingly logical decision, with a sufficiently high content of valuable components so that tailings can be economically exploited, and new technologies for copper extraction and recycling are being developed .
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Recycling and Reuse of Mine Tailings | Encyclopedia MDPI
Here, the idea is to dispose of the waste in an optimized, accessible, and environmentally safe way to allow its reprocessing in the future with the advancement of new technologies. Researchers will address some of them in this research. ... L. Production of eco-friendly bricks from copper mine tailings through geopolymerization. Constr. Build ...
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The Reprocessing and Revalorization of Critical Minerals in Mine Tailings
Other methods of reprocessing tailings waste have proven useful for applications unrelated to critical minerals, such as the dense media separation and froth flotation practices of the Witwatersrand gold fields in South Africa. ... This shows that higher concentrations of copper mine tailings are correlated to higher strengths of concrete ...
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Stirred-tank bioleaching of copper and cobalt from mine tailings in
In this regard, reprocessing mine tailings minimizes environmental impacts by recovering valuable metals. It is also applied to produce more harmless residues, with several bench and pilot scale bioleaching studies for copper recovery already published (Falagán et al., 2017; Medina-Díaz et al., 2022; Roberto and Schippers, 2022; Zhang …
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83.5% Gold Recovery and 94.6% Silver Recovery Demonstrated
83.5% Gold Recovery and 94.6% Silver Recovery Demonstrated by EnviroGold Global for Hellyer Refractory Tailings with 634k oz Gold, 22.9M oz Silver and 419k tonnes Copper-Lead-Zinc with grades of 2 ...
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Sustainable Chemistry | Free Full-Text
For example, the amount of Cu in tailings storage facilities (TSF) around the world is estimated to be about 0.13 gigatonnes, which is equivalent to about 15% of the current geogenic copper reserves …
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Potentially Exploitable Reprocessing Routes for Recovering …
Experiments conducted at the laboratory scale enabled identifying two exploitable routes for recovering metals retained in the tailings: firstly, the sulfuric acid …
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Regionalized Life Cycle Inventories of Global Sulfidic …
This research combines state-of-the-art environmental and mineral processing frameworks, indicating highly variable impacts caused by sulfidic copper tailings deposited worldwide. Regionalized Life Cycle …
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