— 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 …

 — New technology allows it to recover up to 40% of the gold left in particle form in 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.

 — 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. ... Feasibility of re-processing mine tailings to obtain critical raw materials using real options analysis. J. Environ. Manag., 284 (2021), Article 112060, 10.1016/j.jenvman.2021.112060 ...

 — Up to 20% is saved when we use copper ore tailings instead of Portland cement. The copper tailings produced in this way have good strength and durability characteristics. ... Pramusanto, P.; Hermana, F.A. The research of gold processing from tailings of iron sand processing from South Kalimantan by using amalgamation methods …

 — Recently, authors have also investigated the use of Chilean copper-treated tailings as supplementary cementitious materials to improve properties of concrete [86,87], the use of copper tailings deposits for the sequestration of CO 2, and the re-processing of tailings to obtain critical raw materials [89,90].

 — The pyrite grade in the fresh tailing sample and in the flotation product was determined indirectly from the content sulfur, copper and iron. Calculations carried out considering the elemental chemical composition presented in Table 1 and the mineralogical species that contained sulfur, identified by the XRD analysis, allowed to determine that …

 — For copper, which makes up 46% of the global tailings volume, the total amount of tailings and waste rock predicted over 2020–2050 is 858 Gt (ref. 37). Further, due to the decrease in lithium ...

 — 1. Introduction. Mine tailings are waste obtained after the processing of some minerals to acquire one or more elements of interest. They are composed of a mixture of heavy metals, water, sand, and fine-grained solid material, and generally are deposited in ponds without further treatment (Babel et al., 2016; Santibañez et al., 2012; L. Wang et …

 — In addition to these potential direct financial benefits, bio-processing the tailings wastes would help to remove some, at least, of the environmental hazard that these tailings represent (protracted release of metals and acid into the wider environment), much in the same way that bio-processing cobalt-rich tailings at Kasese in Uganda ...

 — The flotation process appears to include some differences, as the copper concentration in the tailings emitted in the 1970's were higher (typical value ca. 470 ppm Cu (Paulsen et al., 1977)) than analyses of the fabricated tailings produced in 2015 (approximately 200 ppm), or the copper content in the ore has changed. The elements …

 — Very small diamonds can be recovered from the residue of the original diamond-bearing ore, and the U.S. Geological Survey found that discarded mine tailings may yield significant amounts of rare earth …

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 …

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 …

 — However, also copper and zinc can bring additional revenues to the project. Differentiating factors of the three pyrite groups in Table 1 are the value streams, sulfuric acid, valuable metals, and energy production. Depending on the ore grade, one or the other value stream becomes the leading parameter of the final process concept and driver ...

 — 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. ... extraction of copper by surface or underground methods can concentrate and expose radionuclides in the waste rock and tailings tailingsThe remaining portion of a metal-bearing ore ...

 — 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.

Safe and effective operation and closure of TSFs is a BHP priority. In 2020, BHP launched a tailings challenge with the aim of developing innovative solutions to repurpose copper …

 — Currently, the majority of copper tailings are not effectively developed. Worldwide, large amounts of copper tailings generated from copper production are continuously dumped, posing a potential environmental threat. Herein, the recovery of iron from copper tailings via low-temperature direct reduction and magnetic separation was …

Standard cost models with capex and opex for flotation, leaching, and magnetic separation were adopted to the needs of tailings reprocessing. A copper tailing (around 2 M t) that also contains magnetite was chosen …

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Assess the types, volumes, fluxes, and critical/hazardous metal contents of copper tailings in the state; Test standard and novel/unconventional methods of recovering these critical …

 — The mine tailings are inhomogeneous and have a complex mineral, aggregate, and chemical composition [59, [109], [110], [111]].Furthermore, although having relatively low quantities of valuable components, mine tailings contain hazardous and toxic compounds connected with waste products or mining activities [82, 84, [112], [113], …

 — By reprocessing tailings, dewatering them and then storing them in a dry stack, mines can remove some of the economic, environmental and societal risks …

 — The 12-month ReTail project, in partnership with CPI, aims to establish the feasibility and environmental impact of processing tailings from Altilium's site in Europe to extract copper, aluminium and other battery materials for use in the UK EV battery supply chain (for example, to produce copper foils for use as current collectors).

 — There is an estimated total of 217,330,652,000 m 3 of tailings in storage globally, with copper accounting for ... its "more energy-efficient process to extract copper from regular- and lower ...

 — The main chemical reagents used in the metallurgical flotation process of copper sulphide minerals and present in copper mining tailings are presented below [2,47]. The following types of reagents are disclosed: (i) acids, (ii) alkalis or pH regulators, (iii) modifiers, (iv) collectors, (v) ing agents, and (vi) flocculants ( Table 1 ).

The efficiency of the froth flotation process has long been known to be strongly dependent on particle size. For sulfide minerals, good recoveries are typically achieved in industrial flotation circuits for particles in the 30 to 150 m size range. Particles outside this critical size are typically lost in industrial operations and rejected to tailings streams due to inherent …

 — Large amounts of silver, copper, molybdenum, chromium, cobalt and other metals were recovered, according to Cassidy, who developed the DRAM technology some years earlier. ... The type of extraction method that can be used on mine waste depends on the mineral deposits the tailings come from and what processing approach was used to …

 — For example, the Potrerillos Copper Mine disposed of mine tailings near its processing plant when it began operations (1920–1938). However, the copper tailings were subsequently disposed of in coastal areas using a technique called offshore tailings disposal (disposal of riverine and marine tailings).

 — 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.com is a series of experiments …