The degree of extracting lead from the activated tailings increases according to the Fourier law when decreasing the NaCl mass concentration, and an optimal range of the H2SO4 (0.38–0.51% ...
قرأ أكثر
One of the advantages of building material production in sustainability is the ability to utilize large amounts of industrial solid wastes, and the use of lead–zinc …
قرأ أكثر
The project is expected to cost $453 million. Mining is anticipated to begin 42 months after all of the finance and insurance is secured. According to a 2019 draft Environmental Impact Assessment Addendum, the mine life will be 10 years. -The developers will likely construct a tailings facility near the mining site, where toxic waste …
قرأ أكثر
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 …
قرأ أكثر
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 …
قرأ أكثر
According to Fig. 5 b, the zinc leaching rate of concrete containing activated tailings was higher than that of the concrete containing raw tailings. The zinc concentration of T R20 was equal to 300 µgr.L −1 after 28 curing days, which lessened to 60 µgr.L −1 after 90 curing days.
قرأ أكثر
In the historical mining zone of Zimapán, México, unprotected tailings deposits are supplying contaminants to the local fluvial system. This research was conducted to assess the environmental hazard of these wastes and river sediments by determining the input, transport and seasonal variability of arsenic, cadmium, lead and …
قرأ أكثر
The TCLP test revealed that an increase in curing days led to a significant reduction in heavy metal leaching rate (cobalt, zinc, lead, nickel, copper, arsenic, …
قرأ أكثر
Tailings from Aba zinc-lead concentrator cannot be discharged in tailings dam by traditional wet disposal method due to the location restriction and environmental consideration.
قرأ أكثر
Previous studies report high levels of heavy metals, such as cadmium, lead, and zinc, in soils of this area (Shu et al., 2004; Yang et al., 2003). In particular, mean reported concentrations of Pb ...
قرأ أكثر
The tailings dam was reaching capacity for conventional wet tailings deposition and so Hindustan Zinc needed a way to resolve this issue. The solution they required would involve creating a small dry-stack tailings area with minimised environmental and physical footprint and also a method to backfill the mine by using an adjusted dry filter ...
قرأ أكثر
Tailings of base metal mining, including lead, zinc, nickel, and copper that occurs in most cases as sulfides, can be a significant source of toxic elements or a raw material for valuable elements recovery (Alcalde et al. 2018; Behera et al. 2020; Nassiri et al. 2021). Depending on the weather conditions, metal sulfides can be oxidized and ...
قرأ أكثر
The threat to the villages has a global precedent. Similar dams have recently given way in countries from Brazil to Russia — with catastrophic effects. In Brazil, a tailings dam killed 270 people when it collapsed in 2019, swamping the town of Brumadinho with torrents of toxic sludge that also poisoned ecosystems downstream.
قرأ أكثر
The total body concentrations of Pb, Cd, and fluoride were higher at the contaminated grassland site established on fluorspar tailings compared to an uncontaminated control site for all three species of small mammal, Apodemus sylvaticus, Microtus agrestis and Sorex araneus. Zn was also higher in M. agrestis and S. araneus but in A. sylvaticus it …
قرأ أكثر
The accident took place on April 25, 1998, at Boliden Apirsa's lead and zinc operation near Aznalcóllar in the province of Seville. On that day, a toxic waste reservoir …
قرأ أكثر
1.1. What Are Mine Tailings? An Initial Scope in an Uncertainty and Complex World. The initial step in mineral processing involves crushing and grinding ore to produce a suitable particle size for further metallurgical processing using physical and chemical separation methods [].Physical separation processes take advantage of the …
قرأ أكثر
Base Metals. The Dairi Project, located 150 km South of Medan in the Dairi Regency in North Sumatra, Indonesia, involved the design and construction of a 1 Mt/y zinc-lead concentrator and associated infrastructure. The flowsheet comprised crushing, SAG milling, flotation, concentrate dewatering and tailings placement.
قرأ أكثر
The tailings dam of the Kooshk lead-zinc mine was found to contain approximately 3.64% zinc, and more than 90% of sphalerite was leached within 14 days …
قرأ أكثر
AbstractThere are large volumes of lead-zinc tailings (LZT) produced in China and elsewhere in the world. LZT disposal to the landfill is problematic and causes many environmental issues. ... "Analysis on tailings generation and comprehensive utilization of typical lead-zinc concentration enterprises in China." Environ. Prot. Circ. …
قرأ أكثر
The lead–zinc tailings were taken from a lead–zinc mine in Huludao City, Liaoning Province, China. The basic physical parameters of the lead–zinc tailings are shown in Table 1.The XRF test results of lead–zinc tailings are shown in Table 2, and the SEM, EDS and XRD test results are shown in Fig. 1.Among them, XRF was detected by …
قرأ أكثر
Waste water will be pumped to a tailings dam with the overflow. ... (LOM) is 11 years. The metallurgical recovery rates for zinc, lead and silver were 83%, 87% and 85% respectively. Cannington underground mine. Cannington is an underground mine accessed via a 5,250m-long, 5.2m-high by 5.5m-wide decline. ... The operation of the …
قرأ أكثر
The tailings were composed mainly of pyrite (76%), together with quartz, gypsum, clays, and sulfides of zinc, copper, and lead. The pH of the pore waters fell to …
قرأ أكثر
The results show that the soil near the tailings pond was alkaline, barren and the heavy metals were seriously polluted. The microbial diversity and richness of S1 and S2 sites were significantly lower than that of CK2 site ( P < 0·05), indicating that the heavy metal pollution could change the physicochemical properties and microbial ...
قرأ أكثر
Fig. 1. Graph showing the dam height ( H in meters) at time of failure, vs. the run-out distance of tailings following dam breach ( Dmax in km) for the historical failure cases, with numbers keyed to Table 1. The envelope curve for run-out distance from all the tailings dams has the equation: (2) D max = 0.01 × H 3.23.
قرأ أكثر
Arsenic, iron and cyanide were identified as the major pollutants in the tailings dam wastewater with average concentrations of 4.5, 25.2 and 11.1 mg·L-1, respectively. Arsenic, iron and free CN ...
قرأ أكثر
When the dosage of TMT reaches 4%, the leaching concentration of lead and zinc is 0.18 and 14.60 mg/L according to toxicity characteristic leaching procedure (TCLP), and the stabilization ...
قرأ أكثر
Abstract. China is the largest producer of lead and zinc concentrate in the world. The lead-zinc mines of China are used to produce multiple products simultaneously. To evaluate the specific environmental impact of the lead-zinc ore mining and beneficiation, life cycle assessment (LCA) was performed by SimaPro 8.5.2 software in this paper.
قرأ أكثر
The goal of recycling lead–zinc tailing (LZT) as. cemented paste backfill ( CPB) is to eliminate two current major problems faced by lead–zinc mining: Minerals 2019, 9, 710 2 of 16 ...
قرأ أكثر
Surface disposal of mill tailings and fly ash is a major concern for many countries, as it pollutes the environment including air, water, and soil. Paste backfilling is an emerging mine backfilling technique, wherein the industrial wastes such as mill tailings, fly ash and blast furnace slag are backfilled inside the stopes. This study examines the …
قرأ أكثر
Lead-zinc tailings used for this study were collected from a lead-zinc mine plant in Shaoguan, China. Lead-zinc mine tailings were prepared by crushing and screening the material to particle sizes below 74 μm. ... The initial bacterial concentration in the bioleaching medium was determined in a cell counting chamber using phase …
قرأ أكثر
The model further predicts that the volume of acidic mine drainage, and the concentration of Zn can be reduced through the installation of a low-permeability barrier downstream of the tailings dam ...
قرأ أكثر
The results reveal that (1) heavy metal pollutants are identified as lead (Pb), zinc (Zn), copper (Cu) and arsenic (As), displaying enrichment at the interface layer …
قرأ أكثر
The results reveal that (1) heavy metal pollutants are identified as lead (Pb), zinc (Zn), copper (Cu) and arsenic (As), displaying enrichment at the interface layer …
قرأ أكثر