Nigeria is rich is solid mineral resources, such as: Kaolin, gypsum, mica, clay, tantalite, iron ore, gemstone, silica sand.
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Recycling concrete &building rubble is not only able to bring profit to investors, but also good for environment protection.
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Base on the plentiful experience of producing and marketing of impact crusher, Sofol R&D institution…
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Adopting technology from the world, PY Series spring cone crusher has an excellent performance in secondary…
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Sofol VSI Series vertical shaft impact crusher is designed by reputed German expert of Sofol and every…
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For instance, by adding pyrite to strengthen the chlorination roasting of cyanide tailings, Qin et al. found that the FeS 2 phase can form CaSO 4 and Fe 2 O 3 by reacting with CaCl 2 at 1100 • C ...
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The leachability of heavy metals (HMs) in tailings is significantly affected by multivariate factors associated with environmental conditions. However, the leaching patterns of HMs in molybdenum (Mo) tailings due to environmental change and cumulative influences of multi-leaching factors remain unclear. The leaching behaviors of HMs in Mo tailings were …
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High amounts of tailings with a low recycling rate are generated during mining and smelting processes, and a lot of environmental problems were caused by heavy metal leaching from tailings. Temperature is a key point in heavy metals leaching, and knowing the effects of temperature on tailings leaching is useful for tailings …
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The IT@SA fully combines the adsorption of heavy metal ions by sodium alginate and iron tailings, which explains why IT@SA's ability to adsorb heavy metals is greater than that of iron tailings. As shown in Table 3, when multi-component heavy metal ions coexist, Cu 2+ and Pb 2+ present the maximum softness and the lowest …
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The new company is to produce 70,000 oz. gold per year from the Florida Canyon gold mine in Nevada.
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The paper examined the effect of bioleaching and microbial mineral carbonation on alkaline tailings. Alkaline tailings typically come from sites that mine metals, such as nickel and cobalt. The researched showed that miners can use microbes to expedite the process of weathering, which breaks down the mineral compounds in the …
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Iron and sulphur oxidising bacteria, especially Thiobacillus ferrooxidans, can increase reaction rates at low pH by up to six orders of magnitude, thereby accelerating the release of metals from tailings. The scale of problems associated with contaminated tailings at mine sites is highlighted by the number of documented sites throughout the …
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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 …
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Characteristics such as copper recovery, bacteria concentration and pH value were shown in Fig. 1 during bioleaching processes. According to Fig. 1 (a), copper recovery in samples T2-0 to T5-0 where tailings were added at intervals was 3.27%, 3.08%, 2.87% and 1.96%, respectively. Oxidation of Fe 2+ and S 2− related to bacterial …
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Magnetic separation is a technology of separating magnetic materials, such as iron, from non-magnetic materials. In the context of metal recovery, magnetic separation is used …
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Iron ore tailing is currently one of the most important secondary mineral resources. Pre-concentration followed by magnetization roasting and magnetic separation process was …
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The chemical and physical properties of iron ore tailings are comprehensively examined in this review, and various beneficiation and metallurgical recovery techniques such as …
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And now we're back to metals recovery. I'm going to use a theoretical example here. 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.
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On November 7, 2023, the US Geological Survey issued a press release announcing that it would invest US$2 million of Bipartisan funding with 14 states to study the potential for critical mineral resources in mine waste. The aim is to map locations of mine waste (i.e., tailings) and measure the potential for critical minerals that might exist …
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A new approach for SMR was developed for efficient iron recovery from iron ore tailings. • An iron concentrate with 58.67% Fe at an iron recovery of 57.82% was obtained. • …
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The average particle size of different IOT was obtained by light scattering (laser granulometry). 10,34-37,44,48,50,52,60,61 …
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Iron ore tailings (IOTs) are a form of solid waste produced during the beneficiation process of iron ore concentrate. In this paper, iron recovery from IOTs was studied at different points during a process involving pre-concentration followed by direct reduction and magnetic separation. Then, slag-tailing concrete composite admixtures …
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The importance for the recovery of heavy metals, together with the economic benefits of precious and base metals, is a strong incentive to develop sustainable methods to recover metals from tailings.
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Existing strategies for managing tailings are to eliminate or reduce discharge of process-affected water, recovery/removal of metals, to manage dust, and to produce stable …
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It can also provide cases and scientific support for the remediation of other heavy metal-polluted tailings. The development of sustainable strategies for metal-contaminated mine tailings remediation has received considerable attention.
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This paper mainly introduces the pyrometallurgical recovery and enrichment process of spent automotive catalysts, including plasma melting and metal capture method, which has the advantages of high enrichment rate, large-scale, and short process, and iron, copper, and lead are often used as metal collectors to capture and recover PGMs.
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Deep sea tailings placement; Tailings transport and pipelines; Dry stacking of filtered tailings; Paste backfill preparation and distribution. We have extensive experience in designing a variety of tailings storage facilities, including in difficult terrain and challenging climatic conditions. We have designed more than 100 tailings dams across ...
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An industry-leading manufacturer of wet processing equipment for materials processors, CDE has seen a significant rise in proposal requests for dewatering and dry stacking …
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Bioleaching of heavy metals from mine tailings by aspergillus fumigatus. Bioremediation Journal 16, 57–65. Article CAS Google Scholar Sharma, B., Shukla, P., 2021. Lead bioaccumulation mediated by Bacillus cereus BPS-9 from an industrial waste contaminated site encoding heavy metal resistant genes and their transporters. Journal …
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Based on the comparison with the total contents, the recovery rates of target heavy metals were 90–120% in sequential extraction procedures. 2.3. Leaching experiments2.3.1. Batch leaching experiments. The toxicity characteristics leaching procedure (TCLP) was employed to estimate the leachability of heavy metals in the …
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The low contents of heavy metals in the tailings and the high Fe contents are explained by the composition of the itabirite, the raw material used to mine the iron ore (Silva et al., 2017), which is composed mainly of quartz and hematite, with low heavy metal contents (Selmi et al., 2009).
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The particle size distribution in tailings notably influences their physical properties and behavior. Despite this, our understanding of how the distribution of tailings particle sizes impacts in situ pollution and ecological remediation in in-situ environment remains limited. In this study, an iron …
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Tungsten is a nonferrous metal commonly used in military and high-tech equipment, and thus has significant market demand. ... Review of Research Status of Recovery of Valuable Metals from Tungsten Beneficiation Tailings, ... Evaluation and analysis of soil migration and distribution characteristics of heavy metals in iron …
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1. Introduction. Metals are essential in the transition to the green technologies e.g. in low emission electric vehicles and in energy storage systems (Upadhyay et al., 2021).At the same time with the positive contribution to the society, mining also produces significant amounts of solid waste (Edraki et al., 2014) belonging with …
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Barrick is also exploring the possibility of critical metals recovery at Nevada Gold Mines, a joint venture with Newmont. The project will specifically target nickel, cobalt, scandium, zinc, and potentially other metals, using an ion-exchange recovery system to extract from heap leach copper solutions.
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Waste materials from metal mining, such as mineral tailings, often contain significant amounts of potentially valuable metals particularly where, as in many historic operations, the efficiency of ...
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1. Introduction. Lead (Pb) and zinc (Zn) are important in the nonferrous metal industry (Nayak et al., 2022), and rank third globally in terms of the industrial consumption of nonferrous metal raw materials, following aluminum (Al) and copper (Cu) (Roshanfar et al., 2020; Singh and Singh, 2019).Currently, the globally proven reserves of Pb and Zn …
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A pilotscale experiment of the recovery iron ore tailings from Jiuquan Iron and Steel Corporation was conducted by Sun et al. [22] using pre-concentration and suspension magnetization roasting ...
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Tailings may be dumped in or near water or transported by wind or water to contaminate the surrounding area. Mine sites typically manage tailings by constructing ponds secured by dams. However, some mining companies are figuring out ways to turn tailings to profits with novel reprocessing technologies to extract valuable metals from …
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The importance for the recovery of heavy metals, together with the economic benefits of precious and base metals, is a strong incentive to develop sustainable methods to recover metals from tailings. Currently, researchers are attempting to improve the efficiency of metal recovery from tailings using bioleaching, a more sustainable …
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Semantic Scholar extracted view of "Remediation of heavy metal-contaminated iron ore tailings by applying compost and growing perennial ryegrass (Lolium perenne L.)." ... Long-term effect of municipal solid waste compost on the recovery of a potentially toxic element (PTE)-contaminated soil: PTE mobility, distribution and bioaccessibility ...
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