The low-grade copper sulfide mine tailings was found to be acidic with a pH of 4.5. Cation exchange capacity was determined to be 13.1 cmol/kg. The d 10, d 50, and d 90 values of the tailings particle sizes were 1.61, 16.18, and 72.4 μm, respectively. According to the particle size distribution results, it can be seen that the permeability of ...
In 2018, the mine's releases of toxic materials via tailings and waste rock disposal were, at more than 8 million pounds, more than four times greater than in 2010, EPA's latest TRI report shows.
Tongling City generates about 7 million tons of copper tailings per year, mainly utilized to fill mining pits and manufacture building materials, with a utilization rate of about 80%. As shown in Fig. 3, filling the mining pits is the most important way to reuse the tailings in Tongling City. The mining pits are filled by adding cementing ...
Part of the Resolution Copper Mining land-swap project in Arizona, US, has had serious pushback from a group of Apaches, who sued the US government in January 2021. ... Tailings are the residues ...
On April 8, a line spilled 850,000 litres of process water . Following a spill of 850,000 litres of process water caused by a frozen pipeline at Highland Valley Copper's tailings facility in ...
Copper mining generates large quantities of waste, tailings, and acid outflows causing long-term environmental impacts and potential threats to human health. Valea Şesei is the largest tailing impoundment in Romania, created by flooding the valley (known as Valea Şesei) of the Metalliferous Mountains (a division of the Apuseni …
Published: June 28, 2016 10:29pm EDT. Identifying mine waste materials as economic resources will help support global demand for critical metals, boosting the mining industry during the downturn ...
Since every ton of copper produced requires mining and processing roughly 250 tons of rock, the past century of major mining has generated an estimated 17.5 B tons of tailings (i.e., nearly 10 cubic km of finely ground, copper-depleted waste rock), with upwards of 200 M tons now added annually and more to come as more copper is mined.
As Table 3 shows, some mining operations have tailings production of more than 100,000 mtpd, led by the Escondida Mine, which is the largest copper mining operation in the world, with an approximate production of 370,000 mtpd of mining tailings. The tailings storage facilities for operations using conventional tailings technology have …
14 rowsExtraction 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 …
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.
In copper mining, tailings can account for 95–99% of crushed and ground ores (Edraki et al., 2014). Worldwide, mine tailings are produced at a rate of anywhere from five to fourteen billion tons per year (Adiansyah et al., 2015; Edraki et al., 2014; berger, 2016).
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 …
Mining the tailings for copper could offer a self-funding option that has the potential to complete proper rehabilitation. The main risk is associated with the possible inhalation or ingestion of dust, and any remediation of the tailings dumps and rock dumps should include stabilising the surface (e.g. by using vegetation).
Mining is an important industry, accounting for 6.9% of global GDP. However, global development promotes accelerated demand, resulting in the accumulation of hazardous waste in land, sea, and air …
Evaluation of heavy metal contamination in copper mine tailing soils of Kitwe and Mufulira, Zambia, for reclamation prospects. Leonce Dusengemungu, Benjamin …
Copper mining generates large quantities of waste, tailings, and acid outflows causing long-term environmental impacts and potential threats to human health. …
Legacy tailings from decommissioned mines are known to negatively impact human health and environmental quality. In this study, potentially toxic elements (PTEs) including Cr, Cu, Ni, Pb, and Zn concentrations in tailings from a Selebi-Phikwe mine, Botswana, were assessed for contamination and health risk via multiple exposure …
The compressive strength of a copper mine tailings-geopolymer composite activated by sodium hydroxide improved with a boost in forming pressure throughout moulding in the investigation of Ahmari and Zhang [225], but only up to a water content of 12% at the outset, and then the compressive strength dropped with a rise in forming …
This paper studies the feasibility of utilizing copper mine tailings for production of eco-friendly bricks based on the geopolymerization technology. The procedure for producing the bricks simply includes mixing the tailings with an alkaline solution, forming the brick by compressing the mixture within a mold under a specified pressure, and ...
Soil remediation with minimum amendments is a good strategy for tailings disposal. Carbonate-rich gold-copper mine tailings occurring alongside the Yangzi River, China, were employed as the objective in this study. They showed the characteristics of fine particles and alkaline pH with high density and low nutrition.
Tongling City generates about 7 million tons of copper tailings per year, mainly utilized to fill mining pits and manufacture building materials, with a utilization rate of about 80%. As shown in Fig. 3, filling the mining pits is the most important way to reuse the tailings in Tongling City.
Tailings from copper and uranium mining often produce measurable levels of radioactivity. Tailing Ponds . Some mining wastes become very fine after they have been ground up during processing. The ...
Apr 19, 2024. In 2018, the global tailings production from copper mining reached 3.44 billion metric tons, up from 3.34 billion metric tons in 2016. Copper tailings production has been steadily ...
For the copper mine tailings studied in this paper, the optimum curing temperature is around 90 °C. e) By selecting appropriate preparation conditions (NaOH concentration, initial water content, forming pressure, and curing temperature), eco-friendly geopolymer bricks can be produced from the copper mine tailings to meet the ASTM …
Electro-remediation of copper mine tailings. Comparing copper removal efficiencies for two tailings of different age - ScienceDirect. Minerals Engineering. …
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 …
Driven by mining volumes, globally generated tailings are estimated to total up to 3.2 billion tons for copper and up to 1.8 billion tons for iron per year. Water conservation and the cost of ...
Researchers at Chile's Pontifical Catholic University are working on a project called Tailings to Construction Materials (T2CM), which aims to transform copper tailings into high-quality ...