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gold recovery from tailings in china
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A systematic review of sustainable gold extraction from …
Gold recovery methods. Following leaching, gold ions remain dissolved in the solution, together with other elements. It is necessary to recover gold ions from this solution, separating them from the other dissolved metals present. This section of the paper reviews some of the most common methods used to recover gold from leaching …
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Recovery potential of rare earth elements from mining and industrial
Hence, in Saskatchewan mine tailings contain 0.41 ± 0.21% of REO (Normand, 2014), while 0.19% of REO are present in tailings from Elliot Lake deposits, Ontario, Canada (Prasad and Ruzicka, 1992). The tailings are generally crushed and available (already mined) for easy REE recovery.
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The Reuse of Gold Tailings as Fill Material for Depleted Mines
Gold mine tailings are an industrial waste left after the beneficiation or recovery of valuable elements from gold ore. Approximately 38.3 tons of tailings are generated for every ton of refined gold produced (Feng et al. 2018).Sichuan is a major province for mineral resources and the amount of industrial solid waste, including …
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Re-Processing Gold Tailings in South Africa
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-
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Towards circular economy in mining: Opportunities and …
In South Africa, there is estimated to be 17.7 million tons of tailings from gold mining (Breytenbach, 2017). In China, approximately 33,000 ha of land has been estimated to be affected by mining activities (Chen et al., 2016), of which 13% by tailings dams (Miao and Marrs, 2000).
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Spatial distribution and environmental implications of heavy …
Study site. The investigated tailings impoundments (Fig. 1) are positioned in the typical lead-zinc mining area of South China, whose geographical coordinates are situated between 113° 39′ 47″–113° 40′ 1″ E and 25° 2′2 6″–25° 2′3 4″ N.The mine is well known for its profitable mineral deposits and tremendous production, and the abundant …
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Recovery of Gold and Iron from the Cyanide Tailings by Magnetic
The gold exposed through the magnetic roasting is the foremost improvement for high leaching rate of gold. Key words:roasting; cyanide tailings; leaching rate of gold; magnetic susceptibility of iron Since the roasting pretreatment technology was introduced from abroad in 1980s, China's gold industry has been developed by leaps …
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From Waste to Wealth: Current Advances in Recycling
The burgeoning accumulation of vanadium-titanium magnetite tailings (VTMT) presents a dual challenge of environmental hazard and loss of valuable metal resources. This review arrives at a crucial juncture in global efforts towards a circular economy, focusing on innovative and effective metal recovery technologies. We explore …
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Cleaner process: Efficacy of chlorine in the recycling of gold …
This study proposes a cleaner chlorine for effective utilization of cyanide tailings. • Thermodynamic analyses reveal that the theoretical best chlorine source is CaCl 2.. The rate of gold recovery was 85.99% by using CaCl 2.. CaCl 2 is the most environmentally friendly in regard to pollution.. CaCl 2 is the best chlorine source for …
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Underestimated environmental benefits of tailings resource …
The rational use of historically stockpiled tailings will help China fight climate change. ... /h, and a handing capacity of 100 kg/h. A concentrate product with an iron grade of 66.75 % and a recovery of 82.79 % was obtained. ... Reusing gold-mine tailings in cement mortars: Mechanical properties and socio-economic developments for the Lefke ...
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A review on complex utilization of mine tailings: Recovery …
The process flow diagram depicts the sequence of operations to recover gold and iron from cyanide tailings, with the direct reduction roasting conducted at 1200°C [64]. Leaching techniques are commonly used in hydrometallurgical processing to extract metals from low-grade ores and secondary resources.
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Hydrometallurgical Recovery of Gold from Mining Wastes
Microorganisms play an important role especially in the gold recovery process from mining wastes and tailings. Some specialized bacteria, fungi, yeasts, algae …
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Tailings Storage Facilities | Sustainability
The overall closure design objective is to construct a facility (or facilities) that will sustainably retain the tailings at that site in perpetuity. Gold Fields TSFs incorporate closure objectives and expected outcomes, the final TSF landform, and agreed ultimate land use. From an environmental perspective, the tailings management plan's most ...
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Recovery of Critical Metals from Mine Tailings | SpringerLink
From all the three pillars of sustainability point of view (economic, social, and environmental), the recovery of critical elements from any secondary source (including mine tailings, electronic waste, and industrial residues) could be beneficial from circular economy perspective, closing the loop on raw materials and reducing the environmental ...
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Recovery and kinetics of gold and iron from cyanide tailings …
1. Introduction. Roasting oxidation-cyanide leaching is one of the main methods for handling gold concentrates that contain arsenic and sulfur in China (Li et al., 2016, Komnitsas and Pooley, 1989) and the produced cyanide tailings are more than one million ton each year.The gold content of cyanide tailings generally exceeds 3 g/t, and …
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From Tailings to Treasure? A New Mother Lode
It expects to recover 58 kg of gold per month, and has enough slimes to last until 2025. Goldfields has also developed new …
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Research Progress on Comprehensive Recovery and …
Many gold-bearing tailings are produced in the mining, dressing and smelting process of gold-bearing minerals, and they contain gold, silver and other …
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Pyrite enhanced chlorination roasting and its efficacy in gold …
According to incomplete statistics, about more than 20 million tons of gold tailings are produced each year in China [4]. Gold tailings–contain heavy metals, acidic effluents and unique oxide–are one of the industrial wastes that not only occupation of large numbers of land, but also damaging the sustainable development of mining industry ...
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Experimental analysis on cyanide removal of gold tailings
The thermal decomposition rule of cyanide in gold tailings was analyzed, and the effects of different roasting temperatures and roasting durations on cyanide removal …
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Utilization of tailings in cement and concrete: A review
The Chinese government published a report that the number of tailings produced in China in 2013 was 1.649 billion tonnes and that the ... The residues after iron recovery from iron ore tailings to prepare cementitious material, Journal of ... I.Y. Elbeyli, S. Piskin, Utilization of gold tailings as an additive in Portland ...
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Progress, challenges, and perspectives of critical elements recovery …
Additionally, under acidic conditions, amyl xanthate exhibited moderate recovery of native Bi (approximately 60 % recovery between pH 4 and 6) but experienced a sharp decline in recovery beyond pH 4. In China, the coexistence of naturally occurring bismuthinite and molybdenite poses a significant challenge for the efficient extraction of Bi.
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The Reprocessing and Revalorization of Critical Minerals …
Abstract. 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 …
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An underexploited invisible gold resource in the Archean …
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 ...
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Socio-Environmental Risks Linked with Mine Tailings …
In other gold ore treatment metallurgical plants, counter-current decantation (CCD) thickener circuits may be considered to recover the solutions; however, the restrictions imposed on conventional wet tailings storage facilities or those with a lot of supernatant process water favor the use of tailings filtering equipment, where the cake ...
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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 …
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Heavy metal pollution caused by cyanide gold leaching: a
It is known that the tailings of gold mines have brought serious heavy metal pollution; however, the heavy metal pollution caused by gold tailings in specific geological environments and extraction processes still must be studied. This study investigated the distribution, speciation, bioaccumulation, and pollution of heavy metals in soils from the …
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Recovery of gold from sulfide refractory gold ore: Oxidation …
In order to recover gold from gold tailings (leaching residues), ... refractory gold ore and pyrite used in each experiment were provided by a gold producing company in Hunan Province of China. The sulfide refractory gold ore and pyrite were dried for 12 h by vacuum drying oven at 60 °C, then ground and passed through a 200-mesh size …
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New approaches for extracting and recovering metals from mine tailings
Mineral tailings from two copper mines were bioleached under different conditions. • Greatest copper extraction was achieved at extremely low pH, at 45 °C and under oxidative/reductive conditions.. Copper present in tailings PLS was selectively precipitated as CuS by biogenic H 2 S.. Microbial communities were dominated by Sb. …
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Current situation and prospects for the clean utilization of …
After thoroughly understanding the available value of gold tailings, researchers performed a series of studies on the recovery of precious metals (such as gold and silver), valuable metals (such as iron, copper, feldspar, mica, silica), and other …
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Accelerating gold extraction from refractory gold tailings …
It can be seen from Table 1 that the main valuable element for recovery in the tailings is gold, which has the gold grade of 10.00 g/t. Table 2 showed that the gold mainly exists in the occluded gold, in which 18.39 %, 22.18 %, and 59.43 % of gold are encased in the hematite, sulfide mineral, and silicate gangue mineral, respectively. The …
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Progress, Challenges, and Perspectives of Bioleaching for …
A pulp density of 20% (W/V) can result in a gold leaching rate of approximately 95%, and the recovery of gold after biological oxidation can be as high as …
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Recovery and kinetics of gold and iron from cyanide tailings …
The experiment on recovery of gold and iron by one-step chlorination-reduction roasting in the muffle furnace was conducted using cyanide tailings from a gold smelting enterprises (Henan Province, China) as research object.
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A systematic review of gold extraction: Fundamentals, …
Currently, no process can effectively recover gold from cyanide tailings. Therefore, related research will be valuable and meaningful as the depletion of global high-grade gold concentrate resources increases. ... "Jinchan" is a new eco-friendly gold lixiviant developed by China Guangxi Senhe High Technology (Technology, 2011).
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New Tailings Reprocessing Technology Has Environmental Benefits
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 elements. Several efforts are underway to extract gold and copper from tailings. Reprocessing mine tailings may also have …
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The detoxification and utilization of cyanide tailings: A …
1. Introduction. In the 19th century, cyanide leaching was proposed, and then it was widely used in gold processing due to its advantages of maturity, low-cost and high-leaching efficiency (Li et al., 2020).Around the world, about 90% of gold is recovered by this method (Acar, 2016; Tu et al., 2019), thereby resulting in the production of …
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Recovery of Tellurium from Cyanide Leaching Gold Tailings …
It is significantly challenging to extract Te from gold-leaching tailings. The effects and the leaching mechanism of direct alkaline leaching and oxidation-roasting alkaline leaching processes on tellurium recovery from cyanide-leaching gold tailings are studied in the Xiaoqinling region, Shaanxi, China. The results show that the leaching of …