Characterization and availability of cyanide in solid mine tailings
— The gold mining industries are among the largest consumers of cyanide due to its high affinity with gold. After the precious metal has been extracted from ore, cyanides are discharged as effluents and as solid mine tailings. Cyanides are highly toxic and their toxicity is related to their physicochemical speciation.
Socio-Environmental Risks Linked with Mine Tailings …
— The countries that currently have gold mining and mine tailings generation are: South Africa, United States, Mexico, Russia, Peru, China and ... allowing the exploration of old pillars of the underground mine, avoiding the storage of mine tailings abroad on the surface with large dams of containment, and considerably reducing the …
Recent practices in mine tailings' recycling and reuse
— For example, mine tailings production in Chile is 1.6 million tons per day and it is estimated that 17.7 million tons of mine tailings are being generated from South African gold mines [2], [3]. Mining activities in China affect 33,000 hectares of land, 13% of which is due to tailings dams.
Hydrometallurgical Recovery of Gold from Mining Wastes
— Recently, Ubaldini investigated the use of thiosulphate for Au extraction using mine tailings from Ribita and Criscior . A gold extraction of 75% after leaching and a recovery of 90% Au after purification (adsorption–desorption–electrodeposition cycle) …
Current situation and prospects for the clean utilization of …
— This paper describes the mineralogical properties of gold tailings, including chemical composition, phase composition, particle size distribution, and microstructure; …
Bioleaching of cobalt from sulfide mining tailings; a mini …
— 1. Introduction. Tailings are residual material streams generated in mining activities. Regarding sulfide ore mines, tailings are typically produced in froth flotation process, where valuable sulfide minerals are selectively separated from non-valuable gangue (Fuerstenau et al., 2007).After the separation, gangue minerals are disposed in …
New approaches for extracting and recovering metals from …
— The most effective extraction of copper (84 to >90%) was achieved by bioleaching the tailings at 45 °C, using a defined microbial consortium, where elemental …
(PDF) Characterisation of Small-Scale Gold Mining Tailings …
— Due to poor technology and lack of proper skills in mineral processing techniques, a greater percentage (about 70%) of gold is lost to the tailings stream in artisanal and small-scale gold mining ...
Determination and detoxification of cyanide in gold mine tailings…
— Akcil A (2002a) Cyanide control in tailings pond: Ovacik gold mine, Turkey. ... Edinger E (2012) Gold mining and submarine tailings disposal: Review and case study. Oceanography 25: 184–199. Crossref. Google Scholar. Egekeze JO, Oehme FW (1979) Direct potentiometric method for the determination of cyanide in biological materials.
A practical guide to re-treatment of gold processing residues
— Re-processing of "old" residue tailings has proved to be a profitable business for several operations, usually when incorporated into an existing facility to supplement declining ore arisings. ... These resources often prove to be a source of "cheap gold" since the high mining and feed preparation costs have already been incurred and ...
Ecological and human health risks associated with abandoned gold mine
— Gold mining is a major source of metal and metalloid emissions into the environment. Studies were carried out in Krugersdorp, South Africa, to evaluate the ecological and human health risks associated with exposure to metals and metalloids in mine tailings contaminated soils. Concentrations of arsenic (As), cadmium (Cd), …
Extraction of Gold from Sands and Slimes Tailings Dump from Mazowe Mine
— The Mazowe Gold Mine is managed by Metallon Gold (Zimbabwe) and is situated in the west-central part of the Harare greenstone belt. ... construction and commissioning of the 60,000 tonnes per month plant at Mazowe mine in 2014 for the processing of old tailings dump from previous operations at Mazowe mine. ... process …
Take two: why mine tailings are worth another look
— The facility now reprocesses gold tailings from the Golden Sunlight mills. The focus is on removing and concentrating sulphur (iron pyrite) to be sold to, and used in …
New Tailings Reprocessing Technology Has Environmental Benefits
— Several efforts are underway to extract gold and copper from tailings. Reprocessing mine tailings may also have environmental benefits. A recent project described in Mining is a series of experiments carried out by an international group of scientists to produce approximately 30 years of passive carbonation of mine tailings …
Recovery of Rare Earth Elements from Mining Tailings: A …
— The growing demand for rare earth elements (REE) driven by their applications in modern technologies has caused the need to search for alternative sources of these elements as their extraction from traditional deposits is limited. A potential source of light rare earth elements (LREE) may be the monazite present in the mining waste …
Gold recovery from synthetic mine tailings leachate using …
— With a limited amount of mineable gold remaining, the process of recovering gold from mine tailings needs development. This paper will specifically investigate the …
Tailings Retreatment
By reprocessing waste rock and tailings to extract gold left behind during the initial mining process, we effectively reduce our environmental footprint while rehabilitating our tailings dams. Tailings are processed at Pan African's two state-of-the-art tailings treatment plants, at Elikhulu and BTRP, which processed 13,093,574 t and 958,106 ...
New Tailings Reprocessing Technology Has …
— Very small diamonds can be recovered from the residue of the original diamond-bearing ore, and the U.S. Geological Survey found that discarded mine tailings may yield significant amounts of rare earth …
Gold mining tailing: Environmental availability of metals …
— The gold ore from sulfide minerals is, in general, ore dressed by means of nine stages among which stand out flotation and cyanidation. The residues of these steps, containing potentially toxic elements, such as As, Cd, Cr, Mn, Zn and Pb disposed of tailings dams, which might be a source of environmental contamination if not suitably …
Historic Gold Mine Tailings | Contaminated Sites
Tailings are a by-product of a gold mining process that was common in the late 1800s and early 1900s. Rocks that contained both gold and arsenic were crushed and then spread over liquid mercury to remove the gold. The mercury was then evaporated, leaving the gold. The remaining sand-like substance is known as tailings. They include arsenic and ...
Remediating mine tailings and recovering gold | Mining
To remediate the toxic mine tailings at no cost to taxpayers while seeing a profit from any gold the company can extract from the stockpile of arsenopyrite concentrate. In December 2011, BacTech Environmental signed a contract with the Mines Branch of the Manitoba Department of Innovation, Energy and Mines to remediate the stockpile located in ...
Hydrometallurgical Recovery of Gold from Mining Wastes
— The reprocessing of wastes and old tailings with moderate to low content of gold offers not only a business opportunity, but also enhances the quality of the …
CHAPTER II MINE TAILINGS 4 FACILITIES: OVERVIEW 3 2 …
MINE TAILINGS FACILITIES: OVERVIEW AND INDUSTRY TRENDS Elaine Baker*, ... than 8 billion tonnes of tailings were produced from the extraction of metals and minerals (Figure 3). The largest volume of tailings, 46 per cent, is produced ... Gold 21% Iron 9% Coal 8% Phosphate 4% Lead – zinc 3% Nickel 2% Platinum Group Elements 1%
Hydrometallurgical Recovery of Gold from Mining Wastes …
— The reprocessing of wastes and old tailings with moderate to low content of gold offers not only a business opportunity, but also enhances the quality of the surrounding environment, changes the ...
Tailings potential: recovering metals from mine …
— In 2022, her company Nibeenabe piloted its device for remediation and attenuation of multiple pollutants (DRAM) technology to filter the tailings from a Madre de Dios mine extracting commodities that …
Mine tailings: reprocess, recover & recycle
— It is essential to the extraction of metals, and can be very expensive to source, treat and recycle or replace. Water is also difficult to keep in a closed loop, and the loss of water and, potentially, minerals contained within it as solids (tailings) or in solution (acid mine drainage) can be very dangerous indeed.
Feasibility of tailings retreatment to unlock value and …
The reprocessing of tailings resources to extract gold on an industrial scale has become common practice. ... asserts that some mining houses are exploring the unlocking of revenue in old tailings facilities ... problem with tailings from the Witwatersrand gold mines. If inhaled, U causes damage to lungs, and after entering the
Ecological and human health risks associated with abandoned gold mine …
— Gold mining has been an important economic activity in South Africa for more than 120 years [20, 21]. The landscape of Krugersdorp, a city in the outskirts of Johannesburg in South Africa, is punctured by tailings dumps of abandoned and active Au mines. ... Abandoned gold mine tailings present serious ecological and human health …
Geoenvironmental Study of Gold Mining Tailings in a …
— According to Blight, South Africa's gold mining industry produced 7.4 × 10 5 t of tailings from 1997 to 2006. In Brazil, it is estimated that 3.8 M oz. of gold can be found in old tailings dam(s) operated from 1834 to 1982.
Graphene could be used to recover gold, silver …
— Best results highlight 96.98% and 97.82% adsorption of gold and silver from solution into graphene-based adsorbents.
Historical assessment of metal recovery potential from old mine
— Historical assessment of metal recovery potential from old mine tailings: A study case for porphyry copper tailings, Chile ... indicating that reprocessing could also be an innovative reclamation technology. The reprocessing of tailings for recovery of metals like gold (Bugnosen, 2001), copper (EPA, 1993) or iron (Karlberg, 2010) is a past and ...
Recovery of strategically important critical minerals from mine tailings
— This indicates that old mine tailings could be a secondary source of critical minerals. Moreover, reprocessing of tailings for minerals recovery, including some heavy metals such as copper (Cu) and zinc (Zn), can help reduce the volume of the tailings to be managed, and concentration of some potentially toxic elements such as Cu and Zn ...
The Reprocessing and Revalorization of Critical Minerals in Mine Tailings
— Mine tailings, the byproduct of mining and mineral processing, are increasingly mass produced as a result of increased demand for metals and minerals as well as the advancement in technology that allows for the exploitation of lower-grade ores. Lower grades can increase the volume of tailings that may contain new gangue minerals …
Historical mercury losses from the gold mines of Victoria, …
— Health and ecological risks associated with the use of mercury in gold mining are well known, with much recent attention focussed on contemporary small-scale artisanal mining. Legacy tailings from historical gold mining may also present ongoing risks, as the industry used large quantities of mercury with minimal environmental regulation to limit …
Take two: why mine tailings are worth another look
— Elikhulu exploits the 200 Mt of gold tailings accumulated over 70 years of mining at the Evander Gold Mining Operation. The retreatment plant can produce up to 65 000 oz of gold per year (oz/y), and it has mineral …