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Tailing, in context to mining, is defined as the waste or non-economic by-product generated during mining activities, processing of minerals, and other materials that contain small amounts of residual valuable minerals, chemicals, water, and heavy metals (Adiansyah et al. 2015).Studies indicated that the process of mineral exploitation and utilization generated a …
Abstract Ceramic s were elaborated from gold-silver tailings and sodium silicates as ing agent. The effects of the temperature and sintering time in a range of 850–880 °C and 30–45 min, respectively, were evaluated. The s obtained were characterized determining their apparent density, porosity percentage, volumetric expansion, …
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 ...
In most instances, a larger proportion of the gold ores extracted end up as waste material (Kossoff et al., 2014). The mining waste by products are collected and accumulated in tailings on the surface of the earth in the vicinity of the gold mines. Gold mine tailings contain several different types of contaminants.
Request PDF | Revealing the Chemical Form of "Invisible" Gold in Natural Arsenian Pyrite and Arsenopyrite with High Energy-Resolution X-ray Absorption Spectroscopy | ABSTRACT: The structural ...
Yet the pyrite-rich tailings also contain up to 3% cobalt, which is worth well over US$23,000 per tonne. It may even be possible to retrieve almost all of the cobalt by using bacterial oxidation .
which contain goethite or jarosite. As is concentrated up to 2150 ppm in the fine-grained (<63 mm) fraction of these Fe-rich weathering products. Individual pyrite grains in albite-chlorite schists of the Clio mine tailings contain an average of 1.2 wt.% As. Pyrite grains are coarsely zoned, with local As concentrations ranging from 00 to 5 wt.%.
Semantic Scholar extracted view of "Implications of Pyrite Oxidation for Engineering Works" by A. Hawkins. ... performed in an area of the Darasun ore cyanidation tailings impoundment, which is located in a permafrost region. The tailings contain up to 40 wt% … Expand. 2. 1 Excerpt; ... 149 References. Citation Type. Has PDF. Author. More ...
To sum up, gold tailings have the characteristics of fine particle size distribution, and its particle size distribution range is mostly −0.074 mm, which makes it difficult to utilize comprehensively gold tailings. ... a vast majority of gold tailings contain more than 80 % of inorganic minerals, such as silica and alumina oxides, and their ...
More Than Just Fool's Gold: Scientists Uncover Hidden Treasure in Pyrite. Recent research led by West ia University explores new sources of lithium, such as mine …
Most tailings reprocessing operations target a native gold fraction using re-milling and carbon-in-leach extraction; however, up to 50–70% of the remaining gold is still not …
The effect of temperature in the range of 20–65 °C on gold extraction from refractory gold tailings containing pyrite in 20% (v/v) of 1-butyl-3-methylimidazolium hydrogen sulphate [Bmim + HSO 4 −]-water solution with thiourea as complexing agent and iron(III) sulphate oxidant, at pH of 1 was examined for 12 h leaching time intervals.The experimental …
Pyrite (FeS 2) is the most abundant metal sulfide in the Earth's crust and is found in a range of geological environments within sedimentary, igneous and metamorphic rocks.In particular, pyrite is a major phase in sulfide-bearing ore deposits associated with base, ferroalloy and precious metals, most notably gold (Wells and Mullens 1973; Leistel et al. 1998; Simon et …
To achieve this grade and recovery of pyrite, it is only necessary to condition the fresh tailings with 30 g/t of collector, 20 g/t of frother, 10 min of conditioning time, adjust the pH to 8 and ...
Results from this study can be used to help assess the potential human health risks associated with exposure to airborne particles from mine tailings.Highlights Airborne dust from As-rich gold ...
Pyrite-containing tailings are commonly produced in mining operations that extract these types of minerals. The amount of pyrite present in the tailings can vary …
tailings or drill cuttings) could serve as a source of additional lithium ... Citation: Pyrite may contain valuable lithium, a key element for green energy (2024, April 15)
The tailings contain up to 60 wt.% as sulfide, mainly as pyrrhotite and pyrite, with pyrrhotite equaling or exceeding pyrite in all observed samples, except in the oxidized zones. Other primary sulfide minerals in the tailings include sphalerite, chalcopyrite, marcasite, and trace amounts of arsenopyrite and galena ( Moncur et al., 2009a ...
At the former Long Lake Gold Mine (Fig. 1) near Sudbury, Ontario, cemented crusts, which are precursors to hardpans, have developed in a sand layer overlying the tailings.The sand layer was placed on the tailings in the early 1970 s, nearly 30 years after the mine was abandoned, in a remediation attempt intended to prevent erosion and transport of …
To sum up, gold tailings have the characteristics of fine particle size distribution, and its particle size distribution range is mostly −0.074 mm, which makes it difficult to utilize …
Native gold deposits and pyrite form under similar conditions, being issued forth in hydraulic activity underground by ancient hydrothermal activity. It was previously thought that pyrite didn't contain gold at all, after all …
In gold mine tailings, a higher concentration of 583 mg/kg was found by Matshusa et al. in South Africa. Bitala et al. also reported concentrations as high as 11,200 mg/kg in …
The effects of bacterial adaptation and partial replacement of leaching solution on the rate and extent of bioleaching reactions of a complex sulfidic gold ore were investigated and it was found that more than 95% of the gold and more than 98%" of the silver could be recovered whenBioleaching was used ahead of cyanidation.
Auriferous sulfide ores often contain very finely disseminated gold and other precious metal particles inside the sulfide crystals. The encapsulation of precious metal particles gives rise to the refractory nature of such ores to current extraction methods. As a result, these fractions are frequently lost in the tailings. The purpose of this work was to investigate the feasibility of ...
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 re-milling and carbon-in-leach extraction; however, up to 50–70% of the remaining gold is still not recoverable and instead discarded to the re-dump stream along with abundant sulphides.
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 re-milling and carbon-in-leach extraction; however, up to 50-70% of the remaining gold is still not recoverable and instead discarded to the re-dump stream along with …
DOI: 10.1016/S0883-2927(99)00115-8 Corpus ID: 55686528; Arsenic speciation in pyrite and secondary weathering phases, Mother Lode gold district, Tuolumne County, California @article{Savage2000ArsenicSI, title={Arsenic speciation in pyrite and secondary weathering phases, Mother Lode gold district, Tuolumne County, California}, author={Kaye S. Savage …
The unaltered Sherridon tailings contain up to 60 wt.% of combined pyrite and pyrrhotite, with the relative proportion variable from 1:1 to 1:2, respectively. Mineralogical examination of samples from the oxidized zone above the main hardpan shows that the sulfides have been almost completely replaced in the most oxidized material near the ...
Most tailings reprocessing operations target a native gold fraction using re-milling and carbon-in-leach extraction; however, up to 50-70% of the remaining gold is still not recoverable and ...
The vast majority of gold mine tailings are acidic, usually very strongly acidic [2,10,11,12]. This is the source of acid mine drainage. The level of acidity depends on the amount of sulphide minerals, mainly pyrite, in the tailings (e.g., ). As long as these minerals are present in the oxidised zone of a TSF, acidity will be produced [2,11].
