Potentially Exploitable Reprocessing Routes for …
Experiments conducted at the laboratory scale enabled identifying two exploitable routes for recovering metals retained in the tailings: firstly, the sulfuric acid …
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Experiments conducted at the laboratory scale enabled identifying two exploitable routes for recovering metals retained in the tailings: firstly, the sulfuric acid …
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To achieve an excellent copper dissolution from the concentrate of flotation tailings, which consist of chalcopyrite as the major copper component, high-pressure leaching (HPL) was conducted using ...
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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 …
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Flotation is a common mineral processing method used to upgrade copper sulfide ores; in this method, copper sulfide mineral particles are concentrated in froth, and associated gangue minerals are ...
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The scope of this study is the entire process of copper tailings resource utilization. All data are actual production data from certain copper tailings resource utilization enterprises in Tongling City in 2021. The tailings utilization volume of 1 ton was selected as a functional unit, and all data were converted based on this unit.
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Copper-rich tailings can be turned into lightweight ceramics by sintering iron tailings mixed with fly ash and sewage sludge in paint making. Tailings can be used as additives for soil in road construction in the construction industry. ... After this process, the tailings are brought into a homogeneous state and mixed with water and activator ...
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In the context of copper tailings, ... The process began by thoroughly blending copper tailings and granulated blast furnace slag within a mixing container. Subsequently, the composite alkali activator and additional water were introduced into the mixing pot. This amalgamation was stirred for a duration of 5 min until achieving full homogeneity.
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Copper tailings has maximum amount of silica (75%). In comparison with the chemical composition of natural pozzolonas of ASTM C618-99, the summation of three oxides (silica, alumina and iron oxide) in copper tailings is 90.76%, which exceeds the 70% requirement for class N raw and calcined natural pozzolanas. Therefore, copper …
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Dewatering of Copper Flotation Tailings: Effect of Feed Dilution on the Thickener Performance July 2018 Mineral Processing and Extractive Metallurgy Review 40(1):1-7
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Reprocessing flowsheets for copper mine tailings in Chile were developed and costs and revenues of possible products from reprocessing were examined for a rough economic assessment.
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They are a mixture of ground rocks and process effluents generated during processing of the ores, and their composition depends on the nature of the mined rock and the recovery process used. In copper mining, tailings can account for 95–99% of crushed and ground ores (Edraki et al., 2014).
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Large amounts of tailings are produced when copper minerals are concentrated by flotation. For instance, the flotation process is performed with water …
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Copper tailings have a high concentration of copper while other contents are within the normal concentration ranges in soil. However, concentrations of heavy metals in iron ore tailings, red mud, and manganese tailings are within the normal concentration ranges in soil. ... Mature fine tailings from oil sands processing harbour diverse ...
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copper production, particularly in Chile, increased significantly. The failure resulted in almost immediate industry-initiated changes to tailings facility construction in Chile. These included: • using dozers to flatten the downstream slope to about half (from an angle of repose of wet sand of about 2.5 horizontal to 1 vertical to about 4 to 1),
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There is a need to define mine tailings in a clear, precise, multidisciplinary, transdisciplinary, and holistic manner, considering not only geotechnical and hydraulic concepts but also integrating environmental and geochemical aspects with implications for the sustainability of mining. This article corresponds to an independent study that …
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Several efforts are underway to extract gold and copper from tailings. Reprocessing mine tailings may also have environmental benefits. A recent project described in Mining is a series of experiments carried out by an international group of scientists to produce approximately 30 years of passive carbonation of mine tailings …
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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.
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Worldwide, an issue of copper production is the generation of mine waste with varying characteristics. This waste can pollute natural environments, and in particular, the heavy metal emissions of the tailings may pose long-term consequences. Currently, life cycle assessments of mine tailings are hampered by both limited data availability in the …
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Flotation is a common mineral processing method used to upgrade copper sulfide ores; in this method, copper sulfide mineral particles are concentrated in froth, and associated gangue minerals are separated as tailings. However, a significant amount of copper is lost into tailings during the processing; therefore, tailings can be considered …
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The total copper recovered from its ore through flotation process is about 56% [6, 18], which indicates that the flotation tailings still contain valuable copper components such as chalcopyrite. In addition, old flotation tailings sometimes have a higher copper grade (0.2–0.4%) than that of low‒grade ores (0.2‒0.3%).
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Copper tailings refer to the solid waste produced during the processing of copper ore, constituting a significant proportion of 95–99% of the original copper ore. These tailings are commonly kept in designated areas such as tailing dams or tailing ponds (Beylot and Villeneuve 2017 ).
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The environmental impacts of reprocessing copper mine tailings were studied. • Process modeling and technology upscaling were performed for inventory analysis. • Tailings reprocessing resulted in climate-positive impacts from a life cycle perspective. • Mineral recovery is essential to ensure significant benefits from …
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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 …
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Ores that contain copper in the U.S. are typically mined in large, open-pits. Copper processing facilities are usually located near mining or extraction sites. Significant waste volumes are associated with copper production. ... Some studies have shown that copper tailings can be used in bricks if pyrites are first removed. For more information ...
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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.
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Capstone says that by processing millions of tons of waste rock, it hopes to produce an additional 350 million lb. of copper, thought to be worth more than $1.6 billion at current prices, in the ...
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Results indicate that reprocessing may save from 25 up to 930 kg CO2-eq per tonne of treated copper tailings. Potential environmental benefits depend on the …
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Based on these assumptions, production of copper tailings is projected to increase from an annual rate of approximately 4.3 Gt/yr in 2020 to 16 Gt/yr in 2050 ... (Re)processing of tailings and waste rock can achieve a Type 1 waste reduction, and in some cases, Types 2 and 3. The activity increases the extractive efficiency, i.e., the …
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Abstract. Flotation is a common mineral processing method used to upgrade copper sulfide ores; in this method, copper sulfide mineral particles are concentrated in …
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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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Copper tailings reprocessing can mitigate GHG emissions and toxicity impacts in 2050. •. Tailings reprocessing can supply up to 2 % of future European copper demand. •. Tradeoffs exist between climate change and ecotoxicity impacts for different …
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