Chronology of major tailings dam failures For a thriving

Chronology of major tailings dam failures (from 1960) (last updated 4 Sep 2014) Note Due to limited availability of data, this compilation is in no way complete Date Location Parent in Hungary 1999, Apr. 26 Placer, Surigao del Norte, Philippines Manila Mining Corp. (MMC) gold tailings spill from damaged concrete pipe 700,000 tonnes of

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A Review of Nchanga Tailings Dam Operations and Seasonal

Recycling of water from the decantation pond of the tailings impoundment back to the main plant is an effective alternative that would eliminate pollution of water bodies. Other methods that could be employed involve the use of chemical and biological treatment technologies.

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Uranium Mining, Processing, and Reclamation Uranium

Treatment will be dependent upon the uranium recovery process, chemicals used, and ore contaminants. Typically, treatment will be a multistep process that will neutralize the effluents, precipitate any metals, and diminish the uranium and radium content.

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Tailings

Tailings, also called mine dumps, culm dumps, slimes, tails, refuse, leach residue or slickens, terra cone (terrikon), are the materials left over after the process of separating the valuable fraction from the uneconomic fraction of an ore.Tailings are distinct from overburden, which is the waste rock or other material that overlies an ore or mineral body and is displaced during mining without

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Uranium Mining and Milling Wastes An Introduction

URANIUM MINES Most uranium ore is mined in open pit or underground mines. The uranium content of the ore is often between only 0.1% and 0.2%. Therefore, large amounts of

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The Hungarian tailings dam accident images of the

Bento Rodrigues a disastrous tailings dam failure in Brazil The Landslide Blog AGU Blogosphere says 6 November 2015 at 0900 many ways this event is reminiscent of the dreadful tailings dam failure at Ajkai Timfoldgyar in Hungary in 2010, which I covered extensively at the time.

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Tailings Management Facilities Water Management and the

Use of Thickened Tailings H 3515 Miskolc, Hungary October 2005. Tailings Management Facilities Water Management and the Use of Thickened Tailings Report of Workpackage 4.2 of the RTD project Sustainable Improvement in Safety of Tailings Facilities (TAILSAFE) treatment. The development of a comprehensive site water balance and

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3. Environmental impacts Wise International

Groundwater also is contaminated from seepage around the uranium mill tailings deposits of the P233;cs uranium mill in Hungary. About 1 2 km westward from the deposit, a number of wells are operated, producing about half of the potable water demand of the city of P233;cs.

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Tailings Dams Where Mining Waste is Stored Forever

Kolont225;r, Hungary In 2010, a tailings dam storing waste from bauxite mining collapsed due to heavy rain. The red toxic sludge from the dam spread over eight square km (more than three square

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Tailings pond in Hungarian English Hungarian Dictionary

en (g) waste land fill sites, with the exception of operational tailings disposal facilities, including tailing ponds or dams, containing dangerous substances as defined in Annex I, in particular when used in connection with the chemical and thermal processing of minerals.

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EXPERIENCIES OF THE LONG TERM AFTERCARE ACTIVITY ON

Treatment Plant Treatment of salt contaminated groundwater 0,5 million m3/year Minewater Treatment Plant Treatment of U contaminated minewater 0,4 million m3/year Tailings Ponds Mine no. I. Pumped water level around the Tailings Ponds and the Water Supply Area Protected water body

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Safety guidelines and good practices for tailings

and good practices for tailings management facilities Safety guidelines and good practices Hungary, in 2010 or the 2012 accident at the Talvivaara Mining Company in Finland. Safety guidelines and good practices for tailings management facilities.

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Tailingsfo What are tailings? Their nature and production

The disposal of tailings is commonly identified as the single most important source of environmental impact for many mining operations (Vick 1990). This is not surprising when considering that the volume of tailings requiring storage can often exceed the in situ total volume of the ore being mined and processed.

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Remediation on the former uranium mining and milling site

Remediation on the former uranium mining and milling site (Hungary) Case Study M. Cs vari The presented work is a common work of the experts from MECSEK 214;KO Rt, P233;cs, Hungary and MECSEK201;RC Rt, P233;cs, Hungary and other companies, institutions DIFPOLMINE CONFERENCE Budapest 4 8 July 2005

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Paste thickening optimizes tailings disposal and water

Mine tailings disposal, and its impact on water usage, is an important concern for any mining company. The challenge today, whether extracting aluminum, zinc, gold or iron ore, is how to dispose of tailings material such that it is contained and stable, while maximizing

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Mining waste 2012

Mining waste is composed of both rocks, minerals and waste solutions that are dug up when miners are trying to get to source of the minerals. These mining waste solutions are not considered to be a health risk or pollutant to the environment, but they arent kept as is.

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Current state of fine mineral tailings treatment A

Evolution of fine mineral tailings treatment objectives. Figures Flocculated solids and Stackable solids are adopted from Alamgir, et al. (2012), permission pending. The last figure Reclaimed land is adopted from Golder Associates (2009), permission pending.

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Mining tailings and wastewater management Veolia

Water contaminated by the Mining industry is also referred to as Tailings. Tailings contain waste from the extraction processes such as equipment wash water, and from the refining process, often discharged in the form of slurry, which is a mix of fine gangue particles, chemicals and water, to large retention facilities called Tailing Dam or Tailing Ponds.

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Hungary Toxic Waste Bursts From Tailings Pond Threatens

Oct 10, 20100183;32;Hungary declared a state of emergency in three counties yesterday after a dam burst at an alumina plant in Ajka, releasing a torrent of toxic red sludge that swept through local villages.

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THE COVERING OF THE ALM193;SF220;ZIT214; RED MUD TAILINGS

(Hungary), after reviewing the IPPC licence, granted the environmental operating licence for the red mud tailings pond no. VII (plot number 03/30, 03/32 Alm225;sf252;zit246;, and plot number 0704/31, 0704/32 D252;naalm225;s) for the bioconversion by composting of 132,000 t/a of

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..pwc 2012 Americas School of Mines

Some tailings incidents Ajka, Hungary (October 4, 2010) PwC Omai, Guyana Internal erosion caused crest of tailings dam to drop over 1 m Cyanidelaced tailings water released into the Omairiver Internal erosion to be explained Passive treatment of ARD influent H 2 SO 4 metal ions

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Enhancing the Safety of Tailings Management Facilities

At site N1 (uranium mill tailings, Southern Hungary), the tailings pond has no or only poor lining, and a large amount of process water has seeped into the soil beneath the tailings. The seepage is detected in monitoring wells installed around the tailings ponds.

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4 Uranium Mining, Processing, and Reclamation Uranium

Key Points The choice of mining methods and processing parameters for uranium recovery depends on multiple factors that are primarily associated with the geological and geotechnical characteristics of a uranium depositits mineralogy and rock type, as well as a range of other factors.

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Alfa Laval P3

Alfa Lavals P3 range of decanter centrifuges is built for the toughest applications and is specifically developed for solid liquid separation in the mining and mineral industry. Every detail has been designed to deal with the harsh conditions found in mining, mineral processing and tailings treatment applications.

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Could the Hungarian tailings dam tragedy happen in Alberta

When a tailings dam burst at an alumina plant in Hungary, more than 700,000 cubic metres of red toxic sludge was released into a river, killing eight people, injuring 120 and forcing the evacuation of 800 residents. Sadly, the tailings dam failure in Hungary is not unique. Every year between two and

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From Tailings to Treasure? Miners Make Money Reprocessing

Thickened tailings can be mixed with cement and used in construction or as backfill in underground mines. Now, some mining companies are figuring out ways to turn tailings to profits with novel reprocessing technologies to extract valuable metals from the waste.

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tailings dam Companies and Suppliers Environmental XPRT

List of tailings dam companies, manufacturers and suppliers . RIZZO Associates (formerly Paul C. Rizzo Associates, Inc.) is an award winning, highly focused firm specializing in all aspects of the civil engineering and earth sciences fields for the dams, nuclear power plants, and tunneling markets.

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Ajka alumina plant accident

Ajka alumina plant accident The Ajka alumina sludge spill was an industrial accident at a caustic waste reservoir chain of the Ajkai Timf246;ldgy225;r alumina plant in Ajka , Veszpr233;m County , in western Hungary .

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Adam Darby Tailings Management Golder

Since the 1970s, thickening and dewatering systems started being applied to mine tailings, but from the 1990s onward, in general, other technologies started being considered, from conventional thickening to paste tailings, filtering technologies, and to a lesser extent, co disposal.

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Red mud

Red mud, also known as bauxite tailings, red sludge, bauxite residue, or alumina refinery residues (ARR), is a highly alkaline waste product composed mainly of iron oxide that is generated in the industrial production of alumina (aluminium oxide, the principal raw material used in the manufacture of aluminium metal and also widely used in the

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