— Historically, safe containment has been the main goal of tailings management. Disposal has taken place in sizable surface impoundments that are enclosed by dams or embankments, as well as in subterranean workings and unnatural depressions [10], [11].However, the environment and communities are seriously endangered by the …
— 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 …
— The gold mining area studied has 5 mine tailings that have been accumulated throughout the operating history of the mine. The topography of the area is relatively flat, and the vegetation is largely grassland. Livestock farming is also widespread in the surrounding area. The climate is temperate, with temperatures averaging 24 °C in …
— 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 ...
— 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 ...
— 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.
— 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 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 …
— 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 ...
— 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.
— 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.
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%
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 ...
— 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 …
— The physico-chemical characteristics of the Gango gold mine tailings and the economic feasibility of reprocessing it was investigated. Characterization was made in two categories of tailings: the ...
— 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 …
— The registry is expected to be updated as new mine tailings facilities are opened and old abandoned tailing deposits are discovered. ... Solvent extraction to recover REEs from mine tailings of gold and tellurium mining (Tunsu et al., 2019).-Use of solvent impregnated resins ...
— 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 …
— 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 …
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
— This paper describes the mineralogical properties of gold tailings, including chemical composition, phase composition, particle size distribution, and microstructure; …
historic gold tailings dams in the Witwatersrand area of South Africa is being investigated. The objective is to recover uranium and residual gold from the tailings, as well as to oxidize the sulphides to eliminate long term environmental liabilities associated with acid mine drainage. The tailings from the re-processing plant will be re-
— 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.
composition of mine tailings generated during the extraction of gold show close features with those frequently used raw materials in glassmaking processes [33,34]. The various environmental issues resulting from gold mine tailings had called for several scientific investigations to resolve the environmental burden that emanates from mine tailings.
What are tAILingS Put simply, tailings are ground up rock minus the gold. Rocks mined from underground which contain gold are called ore. Processing involves crushing the ore into sand to liberate and recover the gold. What's left over is called tailings. Approximately 95% of the tailings are generated from gravity separation methods, which are […]
— A carbonaceous-argillaceous slate (CAS) sample (2.17 g/t gold), prepared from the Orenburg region, Russia, and a pyrite sample (1.15 g/t gold) obtained from the tailings of a sulfide copper-zinc ore flotation plant in the Sverdlovsk region of Russia were examined by Daibova et al. (2019) to extract gold using microbial leaching. Two different ...
— The tailings dumps originating from gold mining in South Africa's Witwatersrand still contain notable gold endowments. Most tailings reprocessing operations target a native gold fraction using ...
— 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 …
— 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.
— 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 ...
— With a limited amount of mineable gold remaining, the process of recovering gold from mine tailings needs development. This paper will specifically investigate the …
— 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 …
— 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), …
— 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 …
— 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 …
— 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 …
— 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 …
— Best results highlight 96.98% and 97.82% adsorption of gold and silver from solution into graphene-based adsorbents.
