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Aug 30, 2010 What was left after the valuable minerals had been extracted—useless residue on a vast scale—piled up outside the mines, a 7,000-acre ridgeline of fine-grained chat dappled with mill ponds …
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Jan 17, 2019 Once the processing is complete, the waste material, referred to as tailings, are pumped to mining residue storage facilities, or what is generally better known as tailings dams. A tailings dam is the physical structure that holds, or impounds, the tailings pond, which serves the dual role of containing the fine material and recycling the water ...
A tailings storage facility is a facility used to contain tailings. This can include a tailings dam (impoundment and pond), decant structures and spillways. A tailings storage facility can also be open pits, dry stacking, lakes or underground storages. A tailings dam is a tailings embankment or a tailings disposal dam. The term
This residue is deposited into tailings ponds where sand settles faster than fine clays which require many years to fully consolidate. Therefore, land reclamation and water recirculation become ...
Feb 25, 2016 TAILINGS PONDS 101. Tailings ponds (or tailings storage facilities) play a critical role in storing solids from mined oil sands and managing water flows. These ponds are massive earth structures, initially constructed from overburden hauled from the mine site. Tailings ponds are normally located in a part of the lease that has little or no bitumen.
On September 8, 2008, an unlicensed iron ore tailings pond in north China's Shanxi Province burst, unleashing a wave of mud and mining wastes that inundated a downstream village with more than 1,000 residents. The disaster resulted in at least 277 deaths and economic losses of more than 96 million yuan.
Jun 26, 2018 The Escondida mine tailings lagoon above – in Chile’s Atacama desert - is the world’s largest tailings pond. The tailings are intended to be held in perpetuity behind earthen retaining dams. The straight line at the left of the photo represents the tallest of the surrounding retaining walls, and is 0.6 miles long. NASA satellite photo.
Sep 25, 2020 Tailings ponds store water used in oil sands extraction, and contain a complex mixture of wastes that are toxic to vegetation and animals. A recent report by the Commission for …
Sep 11, 2013 A typical phosphate mining operation can produce between 180,000 and 225,000 gallons per minute of fine phosphatic clay tailings. This material has a solids concentration of between 2% and 7% on a dry-solids basis. Currently, ponds and lagoons are …
Tailings from gold mining operations can pose a threat to the environment and health of nearby communities. Not only can this waste be harmful if it leaches into groundwater, but it can also mean ...
This two-part article is a case study of the European Union and Spanish legislation with respect to the protection of the environment from mining activity. Mining activity can have many negative impacts on the environment by changing the land-scape,
May 15, 2017 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.
Catastrophic failures of multiple tailings storage facilities (TSF) in recent years has led to greater awareness of the management of mine waste. Being a potentially high-risk asset, TSFs, tailing ponds, dams and residue disposal areas are now considered one of the most important structures on any mine site, with consequences of dam failure ranging from the catastrophic and tragic loss of life, expensive …
Historically, tailings have been stored in dams or ponds, with the settling process left to gravity. This process could take months or years, depending on the nature of the particles. In remote areas with a plentiful supply of water, this was considered to be the cheapest way of handling the residue. Different run-off systems or evaporation would over time produce a solid fraction, which could be removed and used as back fill in disused mine …
low-grade ores that contain less than a few percent of metal values; the residue becomes tailings. Thus, tailings disposal is a significant part of the overall mining and milling operation at most hardrock mining projects. There are several methods used for tailings disposal. These …
May 07, 2015 Tailings may be dumped in or near water or transported by wind or water to contaminate the surrounding area. Mine sites typically manage tailings by constructing ponds secured by dams. According to the web site miningfacts.org, another strategy is to produce thickened tailings, which are pressed or have chemicals added to remove excess water. Thickened tailings can be mixed with cement and used in construction or as backfill in underground mines.
Where such landscape features are not available, above-ground tailings ponds surrounded by dams (“turkey nests”) have to be built. An infrequently used option is backfilling the tailings into underground mines. Paste tailings conditioned with binders would be most suitable for this (Moran, Christoffersen, Gillow, & Hay, 2013). Although the resulting backfill mass would have a low permeability and, …
Abandoned mine tailings from a wide variety of industries are found around the world. The chemical composition of tailings depends on the minerals mined and the extraction technique.
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