— Serious heavy metals pollution was characterized in the lead/zinc mine tailings dam and surrounding soils, as well as copper slag disposal sites. This study investigates the efficacy of modified granulated copper slag (MGCS) as a partial replacement of ordinary Portland cement (OPC) for lead/zinc mi …
The tailings are also very diverse in mineral phases even in the lead-zinc tailings. Figure 2 presents the XRD pattern of lead-zinc tailings coming from different resources. Previous research [] reveals that the mineral phases of the lead-zinc tailings include calcite, dolomite, quartz, kaolinite, galena, pyrite and gypsum, whereas other research [] exhibits that …
— Lead–zinc tailings are the typical solid wastes in mines with high yield and low utilization rates in some countries at present. They are mainly stockpiled in tailings reservoirs, occupying massive land …
— 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 minerals …
The geotechnical properties of the mine tailings must be understood in order to construct more environmentally-friendly tailing ponds, and to further improve the efficiency of …
— The mining and processing of lead-zinc ores produce many lead-zinc ore tailings, which can cause harm by releasing toxic metal ions to the environment. Therefore, the leaching characteristics, acid generation capacity, and fractions of released heavy metals from two Pb-Zn tailings, one from Guangxi designated as F and another from …
— Tailings are the waste materials left after the target mineral is extracted from ore. They consist of crushed rock; water; trace quantities of metals such as copper, …
— Taking a Lead-Zinc mine in Inner Mongolia as an example, this paper introduces the use of tailings backfill technology to solve the problems of surface subsidence due to mining activity, including the following contents: (1) investigation and three-dimensional modeling of underground goaf and surface subsidence area, (2) …
— For example, catastrophic failure of the Buffalo Mine tailings dam in West ia, USA, resulted in the death of 125 people and more than 4000 people losing their homes in 1972 (Orendorff 2009). 3) ... Lead-zinc mine tailings have high contents of Pb and Zn while Cd and Ni contents are generally low. Copper tailings have a high concentration ...
— Tailings comprise the solid waste after the separation and enrichment of ore resources (Chen et al., 2014).Over the past few years, tailings have been commonly used for the backfilling of mining areas, re-soiling and construction materials (as concrete, bricks and cement etc.) (Chen et al., 2018).However, the comprehensive utilization of tailings …
— Of the tailings dam incidents of lead ore mines, 65% (n = 11) cases corresponded to the upstream raise dam design. The downstream dam design was the second most common type, which was noticeable for copper, gold, silver, coal, and phosphorous ore mines. Although the centerline raise dam type was considered safer …
— Study site. The investigated tailings impoundments (Fig. 1) are positioned in the typical lead-zinc mining area of South China, whose geographical coordinates are situated between 113° 39′ 47″–113° 40′ 1″ …
— KOMPAS - A few hundred meters from the village of Sopokomil in northern Sumatra, Indonesia, work is set to begin on a tailings dam for a zinc mine that experts say is a recipe for disaster. The site …
Los Frailes, Aznalcollar, Spain. Figure A: The almost sealed embankment that failed at Los Frailes. Introduction. Minas de Aznalcóllar is located near the town of Aznalcóllar in southwestern Spain and approximately 40 km west of the large city of Sevilla ().It is within the Iberian Pyrite Belt which has a well known mining district for at least a few millennia.
— Dairi Prima Mineral is planning to build an underground mine to extract zinc, lead and silver ore that will create millions of cubic meters of toxic tailings in one of the world's highest earthquake risk zones in Sumatra. ... the remaining millions of cubic meters of toxic waste would be stored in a tailings dam that the company says will be ...
— 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 …
— Health & Safety: The mine site and associated tailings dam are located in an area that is one of the most active earthquake zones in the world. The site is approximately 14 kilometres from the Great Sumatran Fault. ... Pollution: Lead-zinc mines are among the most high-risk types of mine in terms of pollution, as the mining process produces ...
and ecological risk of heavy metals in an abandoned lead–zinc mine tailings dam, this study first employed X-ray fluorescence analysis to determine the vertical distribution patterns of heavy met-
— In this scenario, recycling mine tailings can help reduce the number of tailings for disposal. Circular economy, recyclability, recycling, and reuse have been identified as emerging solutions that can drive the …
— Tailings dams, designed to retain the waste by-products of mining, are among some of the largest engineered structures in the world 5; there are an estimated 8100 tailings facilities worldwide 4.
— In the present study, the lead-zinc mine tailings were prepared from Iranian mines. The first type of mine tailings (T 1) with very low sulfide content (0.4%) was prepared from Tiran lead-zinc mine located in Isfahan province.The second type of mine tailings (T 2) with high sulfide content (19.9%) was prepared from Kooshk lead-zinc mine located in …
— When the ionic HMs leached from lead-zinc mine tailings and entered into soil environment, they can bind to soil minerals, organic matter, and carbonate via the pathways of surface complexation, physico-chemical adsorption, and common precipitation ( Hu …
— The total annual amount of lead–zinc tailings (LZTs) in China is projected to reach 500 million tons by 2020 [1]; however, the country's comprehensive usage rate is only ∼10% [2].Stacking many LZT wastes land resources and causes heavy metal pollution in the soil and water bodies around the mining area [1], [3].Tailing cementation backfilling …
— Tailings are mixtures of crushed rock and processing fluids from mills, washeries or concentrators that remain after the extraction of economic metals, minerals, mineral fuels or coal from the mine resource (e.g., Fig. 1 a; Hudson-Edwards et al., 2001, Younger and Wolkersdorfer, 2004, Lottermoser, 2007).The word 'tailings' is generic as it …
two lead–zinc tailings (termed as YZB and SPC tailings) situated in the Qinling Mountains, Ningqiang county of Shaanxi Province, northwestern China as the research objects. The YZB and SPC tailings are derived from one lead–zinc mine, which has a mining history of 37 years. Before this work, the pollution level and microbial com-
— Imagine a big hole in the ground, similar to the one pictured above. Now imagine that pit filled with up to 10 billion tons of mining waste.
— KOMPAS - A few hundred meters from the village of Sopokomil in northern Sumatra, Indonesia, work is set to begin on a tailings dam for a zinc mine that experts say is a recipe for disaster. The site rests on unstable volcanic ash. The region is wet and regularly hit by earthquakes. And the dam has not been designed to withstand …
— Boliden to expand Tara zinc mine's tailings dam in Ireland. ... The new deposits found at the mine exhibit inferred mineral resources that totals ten million tonnes, offering a zinc grade of 8.5% and a lead grade of 1.8%. Located at depths of 1,200m and 1,900m, the structure of the mineralisation is more complicated than earlier deposits. ...
The residues from the extraction of lead/zinc (Pb/Zn) ores of most Pb/Zn mines are permanently stored in tailings ponds, which require revegetation to reduce their environmental impact. This can only be done if the main constraints on plant establishment are evaluated. This can readily be done by fi …
Boquira mine tailings' sampling The former lead–zinc otation plant from the Boqueira mine was fed with ore from a deposit without large heterogeneity. The tailing dam of this former plant was sampled at several points (samples of about 2–5 kg), and the resulting samples were homogenized and a composite sample was used in the
— Sustainable development principle in mine disposal waste by minimising inputs such as water and energy (Franks et al., 2011) is also covered by those pillars above particularly in environmental and economic pillars.In a condition where the final tailings product has been treated such as by dosing with lime to raise the pH, the sustainability …
— On April 25, 1998, the tailings dam failure at the Los Frailes lead-zinc mine at Aznalcóllar near Seville, Spain, released several million cubic meters of toxic tailings slurries and liquid into the nearby Río Agrio, a tributary to Río Guadiamar, which covered several thousand hectares of farmland, and threatened the Doñana National Park.
The Cause of the Failure. The 25-m-high dam rests on roughly 4 m of river-terrace alluvium (Figure 7), which is underlain by 70 m of blue marl (composed of roughly 25% carbonate).
— 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], …
— To set the scene, we first describe the characteristics of tailings and of construction of tailings dams, and the common causes of their failure. We conclude with …
— 1. Introduction. The lead-zinc mineral resources are indispensable in industrial development and economic growth [1, 2], which has been widely used in the electrical, metallurgical, and pharmaceutical industries [3].However, the environmental impacts of these resources' excavation and subsequent beneficiation have been ignored …
