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 …
قرأ أكثر
The real options valuation method aims to protect and increase the economic return from a project (Savolainen, 2016) and is applied predominantly in …
قرأ أكثر
This method is extremely destructive, polluting water, destroying ecosystems, and ruining livelihoods. Tailings failures are increasing in frequency and severity. In August 2014, a tailings dam breach at the Mount Polley Mine in British Columbia released 5 million cubic meters of toxic waste into nearby creeks and a lake. …
قرأ أكثر
Study area. Two sites in Kitwe and one in Mufulira in the Copperbelt Province of Zambia were selected for this study (Fig. 1).Study sites were Cu and Co mining waste dumpsites and abandoned ...
قرأ أكثر
Schematic representation of the three methods for disposal of mine tailings in the marine environments. (A) Coastal Tailing Disposal; (B) Submarine Tailing Disposal and (C) Deep-Sea Tailing Placement. ... 2007), making the tailings of poor value as a food source for benthic organisms. 3.2.1. Soft sediment biota.
قرأ أكثر
The specific surface area of mine tailings, which ranges between 0.5 and 7.3 m 2 /g and is impacted by the distribution and particle shape, is measured [ 142 ]. The bulk density of mine tailings in the bulk state ranges from 1.81 to 1.93 t/m 3, with 1.81 t/m 3 being the average value.
قرأ أكثر
Value; Path 2: Tailings + Flocculant for mine filling: Tailings: t: 1: Granulated blast furnace slag: kg: 70: Plaster: kg: 10: Cement: kg: 20: ... Mine tailings with high sulfur content are subject to many restrictions in preparing building materials, so most of them are used for filling pits. ... According to the coefficient method, the carbon ...
قرأ أكثر
Tailings is a common by-product of the process of extracting valuable minerals and metals from mined ore. They usually take the form of a liquid slurry made of fine mineral particles, created as mined ore is crushed, ground and processed. Effective tailings management is integral to the safe and sustainable production of metals and minerals.
قرأ أكثر
Priority pollutants in leach liquor of tailings, soil, and groundwater of sites were identified using the osculating value method. The key factors affecting environmental risks of lead‑zinc mine tailing sites were identified using the random forest algorithm. Four types of hydrological settings were classified.
قرأ أكثر
However, the SiO 2 content value of these tailings (=31 %) is quite low compared to the average SiO 2 content values of other tailings (greater than50 %). The sum of SiO 2, Al 2 O 3, and Fe 2 O 3 content is a very important parameter in terms of the mechanical properties of concrete so that tailings can be used as binders in concrete …
قرأ أكثر
Here we show that the photoelectrochemical (PEC) method could effectively resolve the aforementioned drawbacks of PC methods. By applying a bias potential on the photocatalyst (Figure 1 B), the PEC method enables much faster U extraction with exceptional stability, compared with the PC method operating under …
قرأ أكثر
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.
قرأ أكثر
The authors used NPV to compare each option for the disposal of coal mine tailings and, subsequently, to determine the most cost-effective strategy for the mine …
قرأ أكثر
Mill Tailings. Ore or mineral milling or concentration can be performed by a number of methods, such as gravity concentration, magnetic separation, electrostatic separation, flotation, and leaching. The object, in each case, is to separate the metal from the less valuable matrix rock, or gangue.
قرأ أكثر
As huge volumes of materials are required for road construction purposes, they can be a good resource to accommodate waste tailings of mining, particularly where engineers face scarcity of appropriate materials (Zahri et al. 2016).The Boukhadra Mine tailings are of marl, limestones and iron ore waste types, and there is an interest in the …
قرأ أكثر
Irrespective of ore type, the tailings dam failures of Brazil caused the greatest impacts, with a total magnitude index value of ~ 105 from 16 incidents (4% of the total number of failures). In contrast, the sum of the magnitude index was ~ 76 in the US due to 115 incidents (32% of the total number of failures).
قرأ أكثر
pH of tailings The Louis Moore Mine tailings have pH values ranging from 7 to 9, averaging 8. The neutral to weak basic conditions throughout the tailings dump can be …
قرأ أكثر
Materials and methods. Gold mine tailings slurry which was obtained from Bergama Ovacik Gold Mine Treatment Plant, Turkey, was used as alumina silicate material. The slurry sample was dried at 105 °C for 2 h and crushed in a grinder and then sieved to 180 μm. ... Value of R L factor gives information about type of isotherm. If value of R L ...
قرأ أكثر
into consideration that tailings are part of a complex system. There is more complexity to managing tailings than can be handled by simple linear cause-and-effect approaches, and therefore a systemic approach is required. The tailings system needs to balance important components, which can be both interconnected and competing, such as: risk
قرأ أكثر
This work therefore aims to investigate the valorization of copper mine tailings using MICP, while examining the key factors that influence the process. This work could provide the first means to potentially use MICP to create useful bio-solids from copper mine tailings. 2. Material and methods2.1. Characterization of copper mine tailings
قرأ أكثر
Initially, EnviroGold is targeting tailings sites with at least six million metric tonnes of tailings and a gross recoverable metal value of US$124/tonne of tailings. Valuable material held within legacy tailings operations can be exploited to pay for current management costs and technologies as well as environmental remediation and restoration.
قرأ أكثر
The major advantage of alkali activation of mine tailing is that, unlike the other two methods of activation, alkali activated mine tailings can be used as a standalone cement. Alkali activation also: (i) helps in encapsulation of heavy metals and metalloids and thus prevents its leaching; (ii) it has low energy consumption demand and (iii) has ...
قرأ أكثر
From Fig. 11, it is possible to identify the main types of tailings that were covered by the studies, such as "gold mine tailing/gmt," "iron ore tailing/iot," "red mud," "copper mine tailing," and "vanadium tailing," in order of occurrences. It is also possible to identify the use of "sodium hydroxide/NaOH," "KOH ...
قرأ أكثر
One of the important factors that could contribute to its spreading would be developing a simple method of preliminary assessment of the profitability of mine tailings processing. Therefore, the aim of this study is to propose a method that could be used to estimate the cost of mine tailings processing for the recovery of valuable elements.
قرأ أكثر
Mine tailings that are known to cause human health issues, such as uranium-, lead- and arsenic-bearing mine tailings that surround dense urban centres (e.g., Abiye …
قرأ أكثر
pH of tailings The Louis Moore Mine tailings have pH values ranging from 7 to 9, averaging 8. The neutral to weak basic conditions throughout the tailings dump can be attributed to the presence of dolomite (primarily associated with the mineralization) in the tailings. Residual lime used in pH adjustment during cyanidation may
قرأ أكثر
for high tailings facilities in the deep valleys of the Andes in South America. 2.1 NET PRESENT VALUE ACCOUNTING APPLIED TO TAILINGS MANAGEMENT There is a …
قرأ أكثر
An integrated value chain for magnetic separation, microwaves digestion and microemuslsion-assisted extraction, concentration and recover of some metals from iron-containing mine tailings and the corresponding physical-chemical techniques applied for the investigation are proposed in the Scheme 1. Scheme 1 represents the overall view …
قرأ أكثر
for high tailings facilities in the deep valleys of the Andes in South America. 2.1 NET PRESENT VALUE ACCOUNTING APPLIED TO TAILINGS MANAGEMENT There is a commonly held perception that transporting tailings as a slurry to a facility is the most economic approach. However, to a large extent this tailings dewatering, density and …
قرأ أكثر
The leaching concentration of As ranked first among seven HMs, and the corresponding values of 0.223, 0.288, 0.406, and 0.258 mg L −1 in J 1 − J 4 samples (Fig. 1b). Zn ranked second with the corresponding values of 0.075–0.127 mg L −1, while the leachability of Cd ranked third with the average value of 0.0611 mg L −1.However, the …
قرأ أكثر
Say a copper mine produced 1Mt of metal in 1999 at 90% recovery. The remaining 10% of copper, around 111kt, went to tailings. If the average copper price in 1999 was US$1,500/tonne then that 10% represented US$166.5 million of metal. Fast forward 20 years and at today's price, US$5,842/tonne, if that material could be …
قرأ أكثر
Mine tailings are the waste material that remains after the economic fraction has been extracted from the mineral ore. Tailings consist of a slurry of ground rock, ... Common methods of tailings embankment construction Exploration Site selection, design and permitting Construction Operations Closure 5-25 5-10 2-4 20-100 5-50 Perpetuity
قرأ أكثر
This study objective is to degrade xanthate from flotation tailings wastewater by using a coagulation-flocculation co-Fenton oxidation process in an acid mine drainage (AMD)-H 2 O 2 system. More than 98% sodium butyl xanthate (SBX) removal rate was achieved by the method under optimal conditions.
قرأ أكثر
Copper and silver were extracted both from mineral residues and fresh mineral tailings by mixing 0.5 g of representative samples with 10 mL of a solution containing 3.42 M NaCl and 0.2 M HCl ( Romero et al., 2003 ), and heating for 1 h at 90 °C. 2.4. Sulfidogenic bioreactors and selective recovery of copper from PLS.
قرأ أكثر
Whether driven by regulatory compliances, tailings dam failure and water scarcity, mine tailings can well become a strong business case in the near future. Due …
قرأ أكثر
The cover system for mine tailings impoundments suggested in this study is a model wherein a hardpan layer is constructed on top of the tailings that is homogenous both in its properties and thickness, as illustrated in Fig. 1.Also, a capillary break layer composed of a fairly coarse material, such as gravel, can be placed to prevent pore …
قرأ أكثر
Mine Tailings. Exploration of the tailings pond at LKAB, Sweden has shown the presence of REE minerals in the tailings. With a REE concentration of 1200–1500 ppm and an annual tailings production of 8 Mtons, the LKAB iron ore mine has the potential of producing 15 ktons of REEs per year, without considering the 50–100 …
قرأ أكثر
This non-exhaustive review was conducted using conventional content analysis methods, where information is derived directly from the text data with the aim of scoping the potential of the chemically bonded ceramics methods in utilizing mine tailings as raw material, and identifying gaps in the knowledge related to that.
قرأ أكثر