Copper mine tailings are causing great environmental concern nowadays due to their high contents of heavy metals. These hazards may release to air, water, and soil, posing great threat to the ...
If metal contents are high (< 0.5%-wt in copper tailings), other researchers encourage leaching or other separation techniques to maximize metal recoveries ... Guidelines based on life cycle assessment for solvent selection during the process design and evaluation of treatment alternatives. Green Chem, 16 (2014), pp. 3045-3063, 10.1039/c3gc42513d.
copper leaching from old fl otation tailings of the copper mine bor (Serbia), " Metallurgical and Materials Engineering, vol. 26, no. 2, pp. 209 – 222, 2020.
Past, Present, and Future of Copper Mine Tailings Governance in Chile (1905–2022): A Review in One of the Leading Mining Countries in the World. October 2022;
waste management through mine tailings reprocessing at a regional scale. Sulfidic copper tailings in the EU were se-lected as a case study. We perform prospective life cycle …
Extraction of copper from its ore in copper industries produces two types of waste named as copper slag and copper tailings. The copper slag is produced during the process of smelting …
Tailings are residual materials generated during the process of mineral extraction, consisting of finely ground rock particles that are mixed with processing water and chemicals used in the extraction process (Vick, 1990; Lottermoser, 2007; Kossoff et al., 2014).In conventional practice, these non-economic by-product mixtures are discharged behind dams (Hudson …
geotechnical, geochemical, and site-specific elements utilized in selection of a tailings disposal technology. United States regulations and international guidelines for tailings disposal, and general industry accepted goals for current disposal technologies are summarized. Copper deposit geology, ore
As copper tailings appear in ground form, the grading of copper tailings reported by Gupta and Thomas (2013) and Nitish et al. (2013) has a sizeable silt fraction of 0.06–0.002 mm. Copper tailings are considered to be finer than CS, which usually has a dominant sand fraction. Table 6.5 compares the geotechnical properties of copper tailings to those of CS, which have been …
Due to the ever-growing demand for copper minerals, a significant amount of copper tailings have been produced as byproducts during the extraction of valuable copper minerals (Furnell et al., 2022; Rebello et al., 2021).According to the latest Global Tailings Review, approximately 14 billion tonnes of mineral tailings have been produced, of which 46 % …
In this study, we examined the floristic composition and biological traits of species that colonized copper mine tailings dams in Zambia, an environment with elevated copper concentrations, low ...
Copper tailings, also known as copper tailing sand, consist of finely powdered sand particles left after minerals were crushed and selected. Those were the bulk of industrial solid wastes ... Due to the sieved selection of CS particles, the content of very fine particles in CS was reduced. The fineness modulus of the mixed sand remained within ...
This chapter discusses the potential valorization of copper mine tailings as a sustainable road construction material through geopolymerization, and addresses environmental, technological, and economic challenges. ... Nevertheless, via the careful selection of NaOH concentration and moisture content, the geopolymerized MT can satisfy the 7-day ...
Chilean copper mine tailings have substantial economic potential as a source of critical materials such as vanadium, cobalt, rare earth elements and antimony. Minerals contained in Chilean mine tailings from copper production are mostly silicates with a low grade of CRMs; currently, no approved projects exist that consider mine tailings as a ...
The copper tailings from the concentrator plant were classified in a hydrocyclone. station of 500 mm Eral Hydrocyclones, functioning by gravity, in a conical configuration, with four operating ...
The copper tailings were obtained from Jiangxi province, and their main chemical compositions were SiO 2, Al 2 O 3, and CaO, with a small amount of Fe 2 O 3 and MgO, as summarized in Table 1. To ensure that the fineness of the copper tailing met the requirements of the specification, a special ball mill was used to grind the tailing for 45 min.
Results for copper and zinc indicated similar patterns when comparing tailings to MSW-landfills. For copper a theoretical resource potential of about 2,600t stored in tailings could be …
16 reveals that together, copper tailings from the large (i.e., porphyry) and medium-size copper 17 deposits (i.e., volcanogenic massive sulfide and sediment-hosted) contribute to more than 18 …
Bao et al. [11] explored the process flow for reprocessing iron tailings and determined the adoption of a process flow of "copper-zinc mixed flotation - regrinding - copper-zinc separation - zinc flotation - iron magnetic separation - reverse flotation of iron concentrate" to recover Cu, Zn, Fe, and associated precious metals from iron tailings ...
The mining and processing of copper in Kilembe, Western Uganda, from 1956 to 1982 left over 15 Mt. of tailings containing cupriferous and cobaltiferous pyrite dumped within a mountain river valley.
Copper tailings are produced from different mines, and thus it is important to fully characterize the quality and quantity of copper tailings at each site. ... This selection of impact indicators aims to capture the most relevant impact categories when dealing with waste management and metal/mineral processing and supports comparability with ...
The use of copper tailings in concrete samples reduced the cadmium leaching rate to zero in T 10 T C a T A 90, which was made through the second scenario. The amount of lead leaching is shown in Fig. 5 e. The total concentration of lead in copper tailings was 20 mg/kg and its leaching rate based on TCLP was 9 mg/L. The amount of lead leaching ...
tailings dams. Historically, processing efficiency was much lower than it is today, resulting in tailings being higher grade (Falagán et al., 2017). For example, over the 20th century the copper grade of tailings has fallen from 0.75% to 0.14% (Gordon, 2002). In some cases historic tailings dams can therefore be higher grade than current ...
Apply a comprehensive, multi-criteria analysis of the options for tailings discharge, disposal, and storage with the specific goal of selecting an option that minimizes risks to people and the …
Copper tailings are the fine-grained remains of copper ore produced through a series of processing techniques, and belong to the by-products produced during the mining process of mineral resources [1].It is characterized by a high SiO 2 content and a mineral composition dominated by quartz and silica-aluminates [2].As of 2022, the production of tailings in China …
And in the abandoned copper mine tailings in Romania, the concentrations of Cu and Zn appeared to be 34.11–1048.17 mg/kg and 61.35–141.23 mg/kg, respectively (Pehoiu et al., 2019). The high proportions of Cu and Zn in the tailing of Dexing Copper Mine may attributed to the contents of the ore. This high levels of heavy metals exacerbate the ...
Copper ore mining and processing release hazardous post-flotation wastes that are difficult for remediation. The studied tailings were extremely rich in Cu (1800 mg kg −1) and contaminated with Co and Mn, and contained very little available forms of P, Fe, and Zn.The plants growing in tailings were distinctly enriched in Cu, Cd, Co, Ni, and Pb, and the concentration of copper …
Sulfidic copper tailings in the EU were selected as a case study. We perform prospective life cycle assessments of future reprocessing scenarios by considering emerging …
3.2 Contents and chemical fractions of heavy metals in the low-grade copper sulfide tailings 3.2.1 Contents of heavy metals. Heavy metal concentrations, as shown in Table 3, were investigated to reveal the pollution status in the low-grade copper sulfide tailings pond. In comparison to the national soil pollution risk screening value limit (GB ...
the copper present in the tailings as oxide precipitates. The result of the reactions is copper sulfate as shown in the reaction (7). Copper: Cu(OH)z + HzSO, 4 Cu^ + SO^~ + 2 %() (7) Once the copper is in solution it can be recovered from the process. The details of the copper recovery are discussed in the following section. The
Copper pyrometallurgical slag flotation tailings (CSFT) are a main by-product and waste of the copper (Cu) pyrometallurgical industry, generating >1.5 billion tons per year in China [1], containing both valuable metals (e.g. Cu, Fe, Mo, etc.) and toxic elements (e.g.As, Cd, Cr, etc.) [2].It is estimated that the entire utilization rate of these wastes is lower than 20 %, …
Overall, the findings of the present study indicate that high percentages of Sungun copper tailings could be used as a substitute for cement in concrete construction, which could be employed at older ages for applications that do not require high strength. It is worth noting that due to the lower compressive strength of concrete samples ...
Recovering copper is a crucial strategy to keep up with demand. One approach is to reprocess mining tailings to extract the vital copper resources within.
The copper and oil sand tails were sandy soils and classified as silty sand (SM) by the Unified Soil Classification System, while the gold tailings ... for tailings deposits makes parameter selection for design a challenge, even when laboratory results for design mixtures are available. Accordingly, it is useful to have a ...
of Copper Mine Tailings. Front. Environ. Sci. 5:79. doi: 10.3389/fenvs.2017.00079 Plant-Mediated Changes in Soil N-Cycling Genes during ... especially when plant species selection is correlated with. Li et al. Plant Changes N-Cycle in Rhizosphere N-accumulation (Mendez and Maier, 2008; Parraga-Aguado
A maximum copper extraction of 60 % was obtained in column bioreactor tests with copper flotation tailings (∼0.2% Cu) from Zambia (Hao et al., 2021). Bioleaching in 10-L stirred tank reactors (STR) reached metal leaching of 87% Co and 43% Cu from Scandinavian tailings (Mäkinen et al., 2020).
The copper grade is substantially higher compared to the average copper grade in tailings from the 1930s of 0.33% and far above the average of SERNAGEOMIN's cadaster of mine tailings (sampling only the first meter), which gives copper grades of 0.27% for inactive and abandoned tailings <10 M t . The investigated TSF was in operation between ...
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.