Socio-Environmental Risks Linked with Mine Tailings …
The process water from gold mine tailings presents high concentrations of total dissolved solids consisting of sulfate (4000 mg/L to 6000 mg/L) produced by the addition of cyanide in the leaching process and destruction of cyanide in the tailings [67,70]. On the other hand, the sodium concentrations are on the order of 2000 mg/L as a …
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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 reserves of 1.5 million ounces (Moz) of gold. ... However, the majority of the tailings are stored together with process water ...
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(PDF) Experimental analysis on cyanide removal of gold tailings …
The cyanide content of gold tailings exceeds the standard seriously due to the cyanide extraction process. In order to improve the resource utilization efficiency of gold tailings, a medium ...
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5 methods of gold mine tailings treatment and comprehensive recovery
2. Gold mine tailings dry drainage process dehydration. The dry tailings discharge process eases the storage pressure of the tailings reservoir, reduces the hidden safety hazards of the tailings reservoir, and the utilization of backwater reduces the pressure of sewage treatment and saves the production and operation costs of the mine. …
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Mechanical and Hydration Characteristics of …
Sustainable resource utilization of tailings is a long-term challenge. Therefore, a novel waste-based binder is proposed in this study to stabilize/solidify gold mine tailings (GMTs). This binder is composed …
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Experimental analysis on cyanide removal of gold tailings …
The use of gold tailings to replace some of the cement raw materials for cement production has the advantages of complete cyanide removal and simple process. However, in order to ensure that the quality of cement is not affected, only a small amount of tailings can be mixed, making it difficult to improve the efficiency of tailings treatment 23 ...
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Research on Beneficiation and Reprocessing of Gold Tailings …
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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About Tailings Fact Sheet
The remaining tailings is generated via a chemical leaching process which uses small quantities of Cyanide to extract fine gold from sulphide minerals which co-exist in the ore. These processes are water based, meaning tailings from the mill are pumped as a slurry to the Tailings Storage Facility (TSF) where they are stored in fully engineered ...
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The Recovery of Gold in Low-Grade Cyanide Tailings by
The efficient recovery of gold from low-grade cyanide tailings containing 1.71 g/t Au was performed by a chlorination roasting–flotation process.
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Tailings.info What Are Tailings?
Introduction. Tailings consist of ground rock and process effluents that are generated in a mine processing plant. Mechanical and chemical processes are used to extract the desired product from the run of the mine ore and produce a waste stream known as tailings. This process of product extraction is never efficient, nor is it possible to ...
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Resource Utilization of Cyanide Tailings: Preparation of
Cyanidation is still the most common process for gold extraction because of its stability, high leaching ratio, and fast reaction rate. 1,2 The process of gold extraction by cyanidation inevitably produces a large amount of cyanide tailings, which, due to the specific nature of the process, has a tailing production ratio of nearly . For China …
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Determination and detoxification of cyanide in gold mine tailings…
Cyanide, which remains the preferred chemical used in the gold extraction process, has the potential to be disposed of on goldmine tailings. South Africa has nine goldfields, producing ...
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(PDF) Use of Gold Mine Tailings in Production of Concrete …
Keywords: Gold mine tailings, workability, compressive strength, splitting tensile strength, flexural strength with gold mine tailings as partial substitute for fine aggregates will be required before the commercial production. 1. Introduction Gold mine tailings are one of the primary waste products of mining operations.
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(PDF) Experimental Analysis on Cyanide Removal of Gold Tailings …
The cyanide content of gold tailings exceeds the standard seriously due to the cyanide extraction process. In order to improve the resource utilization efficiency of gold tailings, a medium ...
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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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Study on the activation mechanism and hydration properties of gold
The scanning electron microscope (JSM7800F) was used to observe the changes in the apparent morphology of the gold tailings during the activation process. 2.2.6. Hydration properties analysis. In order to study the hydration properties of gold tailings activated by mechanical-chemical-thermal coupling, G1 was used as a control …
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(PDF) Physico-chemical Characteristics of a Gold Mining Tailings …
The tailings dam stores process effluent from the gold extraction plant. Wastewater samples taken from the tailings dam were analyzed for physico-chemical characteristics. Arsenic, iron and ...
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Sustainable processing of gold cyanide tailings: Reduction …
1. Introduction. Gold is an important financial market component, widely used in currency, jewelry, and cutting-edge fields. Cyanidation is the main gold extraction method in gold smelting enterprises, and it has been applied in the industry for >100 years (Sitando et al., 2020; Yong-bin et al., 2015).Large quantities of CTs are produced in the process …
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A practical guide to re-treatment of gold processing residues
A process that can economically recover gold, uranium and rare earth elements while removing toxic- and semi-metals can help to simultaneously clean up tailings while generating local employment and revenue. ... A prominent example are the Witwatersrand gold mine tailings in South Africa, which have been reused in small-scale …
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Evaluation of pre-treatment methods for gold …
SYNOPSIS. The South African gold mining industry has a legacy of abundant tailings dams, which have attracted the attention of investors because of their potential as a cheaper secondary gold resource. In this …
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Cleaner process: Efficacy of chlorine in the recycling of gold …
1. Introduction. Industrial residues, tailings and by-products are good choices secondary materials used as low-cost and environmental friendly materials (Lu et al., 2018).Refractory gold deposits containing sulfur and arsenic have attracted more and more attention, due to the overexploitation of high grade gold deposits (Alp et al., …
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Accelerating gold extraction from refractory gold tailings via …
In this study, a new fluoride pre-treatment process to expose occluded gold from the tailings was investigated. The mechanism of pre-treatment process that …
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Treatment And Utilization Of Gold Mine Tailings
To be shortly saying, tailings are ground up rock minus the gold. The placer or rocks mined from underground which contains gold is called ore. The gold mining …
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Propagation network of tailings dam failure risk and the
The tailings dam system is complex, and the dam structure changes continuously over time, which can make it difficult to identify key hazards of failure and characterize the accident formation ...
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Cleaner process: Efficacy of chlorine in the recycling of gold …
Under the best conditions, roasting tailings with 5 wt% CaCl 2 at 1273 K yielded an 85.99 wt% gold recovery and 82.84 wt% chlorine removal. Thus, the harmless …
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Hydrometallurgical Recovery of Gold from Mining Wastes
Cite. Advertisement. Abstract. Gold is a highly required material for a wide range of personal and industrial applications. The high demand for gold, together with …
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Research on Beneficiation and Reprocessing of Gold Tailings
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 slimes from its extensive tailings resources. It expects to recover 58 kg of gold per month, and has enough slimes to last until 2025.
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Selection on the Process of Enriching Gold by Smelting from …
Refractory gold ore containing a small amount of copper is more efficient to enrich gold in direct smelting process. The refractory gold ore containing Au 72.07 g/t, Cu 3.0–5.0% and As 5.58% was melted directly under conditions: FeO/SiO 2 1.2, CaO/SiO 2 0.4, temperature 1250 °C, oxygen flux 0.8 L/min, ventilation time 10 min. The boundary …
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Gold in Tailings — Mineralogical Characterisation and …
gold leaching process selected (almost universally cyanide, although other lixiviants are being investigated) and the gold extraction process selected (solid/liquid separation followed by Merrill Crowe and adsorption on activated carbon being the most common processes). Gold in tailings occurs in two major forms: liberated and locked.
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(PDF) Potential Uses of Artisanal Gold Mine Tailings
The beneficiation carried out using centrifugal separation, regarded as an extension of gravity separation, showed gold grades in the range of 535–1515 g t−1 for gold ores and 36–302 g t−1 ...
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