Reprocessing Mine Tailings To Control Acid Rock Drainage

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Waste not want not

Mine waste facilities can be long-term regulatory and corporate liabilities if they produce contaminated effluents Acid rock drainage and metal leaching is a major problem at many mine sites and may be difficult or even impossible to control once started However these facilities may still be a resource for the recovery of metals

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Desulfurization of the Old Tailings at the Au

Tailings from the abandoned Tiouit mine site in Morocco are mainly composed of sulfides hematite and quartz They contain 0 06–1 50 wt % sulfur mostly in the form of pyrite pyrrhotite and chalcopyrite The tailings also contain gold (3 36–5 00 ppm) silver (24–37 ppm) and copper (0 06–0 08 wt %) Flotation tests were conducted to reprocess the tailings for Au Ag and Cu recovery

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Clean tailing reclamation Tailing reprocessing for

article{osti_585732 title = {Clean tailing reclamation Tailing reprocessing for sulfide removal and vegetation establishment} author = {Jennings S R and Kruegar J } abstractNote = {Mine wastes exhibiting elevated heavy metal concentrations are widespread causes of resource degradation in the western US and elsewhere This problem is further exacerbated by the presence of pyrite that

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Mine Waste Transfer and Disposal Methods

Mine Tailings Tailings are finely ground rocks and other mineral waste as a result of mineral processing Due to the way minerals are processed tailings can contain concentrations of processing chemicals This can make mine tailings an environmental

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STANDARD GUIDANCE (COP 37) Tailings and Waste Rock

STANDARD GUIDANCE (COP 37) Tailings and Waste Rock new technologies to prevent and control acid rock drainage Canada has lead a focused research program to address acid rock drainage and metal leaching directed by a committee of industry government and NGO representatives

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Waste not want not

Mine waste facilities can be long-term regulatory and corporate liabilities if they produce contaminated effluents Acid rock drainage and metal leaching is a major problem at many mine sites and may be difficult or even impossible to control once started However these facilities may still be a resource for the recovery of metals

Get price

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Preventing acid mine drainage from mine tailings

Keywords Acid Mine Drainage tailings sulphide ores soils and groundwater contamination heavy metals leachate 1 Introduction 1 1 Sulphide mine waste and tailings It is known that mining industry causes negative impacts in its surrounding area The production of acid mine drainage (AMD) has long been known to occur in

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Marine and Riverine Discharges of Mine Tailings

drainage/acid rock drainage) Acid mine drainage is one of mining's most pressing issues Sulfuric acid in addition to being potentially toxic in itself accelerates the leaching of heavy metals from the mine tailings or waste rock The potential for acid rock drainage from mine tailings and waste rock can be

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From Tailings to Treasure? Miners Make Money Reprocessing

Miners Make Money Reprocessing Tailings Mintails a mine tailings processor has developed new technology to process 350 000 tons of slimes from its extensive tailings resources It expects to recover 58 kg of gold per month and has enough slimes to last until 2025

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From Tailings to Treasure? Miners Make Money Reprocessing

Miners Make Money Reprocessing Tailings Mintails a mine tailings processor has developed new technology to process 350 000 tons of slimes from its extensive tailings resources It expects to recover 58 kg of gold per month and has enough slimes to last until 2025

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cimfr csircentral

mining industry The main cause of acid mine drainage is the occurrence Of pyrite and sulphide minerals with the rock of coal seams During mining these sulphide minerals get exposed to air and mine water then oxidation and hydrolysis results in the generation of acid mine drainage The low pH value Of the discharge mine water results in the

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Acid Mine Drainage (AMD) / Acid Rock Drainage (ARD)

Acid Rock Drainage as a concern and part of all metals and mining operations ARD is often mislabelled AMD or Acid Mine Drainage too So to better understand AMD and ARD let's begin by defining some terms like pH -The standard measure of acidity

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Hardrock Mining Environmental Impacts

Mined materials such as waste rock or tailings used for construction or other purposes (e g road beds rock drains and fill material) can also develop acid mine drainage The receptors of contaminated surface water include birds fish and other aquatic organisims

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Mount Polley Mine Tailings Dam Failure Update on

there is a low risk of acid rock drainage potential from the tailings Kinetic testing results have been reported for 32 weeks as of the date of this report Results support the assessment that ARD is not expected from the tailings and leaching will be under neutral to alkaline conditions

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Preventing acid mine drainage from mine tailings

Keywords Acid Mine Drainage tailings sulphide ores soils and groundwater contamination heavy metals leachate 1 Introduction 1 1 Sulphide mine waste and tailings It is known that mining industry causes negative impacts in its surrounding area The production of acid mine drainage (AMD) has long been known to occur in

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Metal Leaching Acid Rock Drainage Policy

1 2 Metal Leaching and Acid Rock Drainage Metal2 leaching and acid generation are naturally occurring processes which may have negative impacts on the receiving environment if they occur in the absence of adequate neutralization dilution and/or attenuation

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DISPOSAL REPROCESSING AND REUSE OPTIONS FOR

DISPOSAL REPROCESSING AND REUSE OPTIONS FOR ACIDIC DRAINAGE TREATMENT SLUDGE1 Janice Zinck2 1 Poster paper presented at the 7th International Conference on Acid Rock Drainage (ICARD) March 26-30 2006 St Louis MO Codisposal with Tailings Many mine sites dispose of treatment sludge with mill tailings to reduce the waste

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Techniques to correct and prevent acid mine drainage A review

At-source control of acid mine drainage International Journal of Mine Water 9 (1-4) pp 85-96 1990 [ Links ] [39] Brodie G A Staged aerobic constructed wetlands to treat acid drainage Case history of Fabius Impoundment 1 and overview of the Tennessee Valley Authority's program In Moshiri G A Constructed Wetlands for Water Quality

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Waste rock and tailings – Waihi Gold

This rock is referred to as potentially acid forming (PAF) rock Waste rock without the potential to form acid drainage is referred to as non acid forming (NAF) waste rock Special design and operational procedures are used to control acid drainage generation As a contingency provision is made to collect and treat any fluid that is generated

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Reprocessing Tailings Dams

Apr 10 2014Reprocessing Tailings Dams – A systematic characterisation approach (Part 2) 2014 Acid Rock Drainage Geometallurgy Tailings In the first part of this blog (2nd April 2014) a brief introduction was given on having a systematic approach to tailings characterisation There is no argument that tailings dam reprocessing can be profitable

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Metal Leaching Acid Rock Drainage Policy

1 2 Metal Leaching and Acid Rock Drainage Metal2 leaching and acid generation are naturally occurring processes which may have negative impacts on the receiving environment if they occur in the absence of adequate neutralization dilution and/or attenuation

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Control of acid rock drainage from mine tailings through

Acid mine drainage detrimentally affects thousands of surface watercourses throughout the world and costs tens of millions of dollars annually in site remediation expenditures This process is accelerated by the activity of iron- and sulfur-oxidizing bacteria which grow chemolithotrophically in mine tailings

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Long

Collection supporting the effective long-term management of acid rock drainage (ARD) from sulfidic mine wastes in current exhausted and legacy mine sites An optimised geochemical and microbial multi-barrier approach to long-term reduction of ARD to environmentally acceptable rates was developed

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Mining and Water Pollution — Safe Drinking Water Foundation

Dec 17 20161 Acid Mine Drainage Acid Rock Drainage (ARD) is a natural process whereby sulphuric acid is produced when sulphides in rocks are exposed to air and water Acid Mine Drainage (AMD) is essentially the same process greatly magnified

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Acid Drainage

Path Forward Symposium May 21 25 2012 Ottawa ON Canada On May 21 2012 the day before the International Conference on Acid Rock Drainage (ICARD) in Ottawa Canada Division 70 international experts met to identify new directions to meet the challenges of mine-impacted waters

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Acid mine drainage past presentfuture?

The mining of base and precious metals results in the production of immense quantities of waste rock mill tailings and waste related to refining processes The generation of acid mine drainage (AMD) and release of water containing elevated concentrations of metals from mine wastes is an environmental problem of global scale

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EVALUATION OF ALTERNATE DRY COVERS FOR THE

Special industry-government task forces such as the Mine Environment Neutral Drainage (MEND) program were established to address acid mine drainage and its control This study on the Evaluation of Alternate Dry Covers for the Inhibition of Acid Mine Drainage from Tailings represents part of the ongoing acid mine drainage (AMD) research effort

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Control of acid rock drainage from mine tailings through

Acid mine drainage detrimentally affects thousands of surface watercourses throughout the world and costs tens of millions of dollars annually in site remediation expenditures This process is accelerated by the activity of iron- and sulfur-oxidizing bacteria which grow chemolithotrophically in mine tailings

Get price

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INTEGRATED ACID ROCK DRAINAGE MANAGEMENT AT THE

INTEGRATED ACID ROCK DRAINAGE MANAGEMENT AT THE PHU KHAM COPPER GOLD OPERATION IN LAO PDR Stuart Miller1 progressively over the mine's life utilising selected waste rock from the mine and borrow from legacy from waste rock and tailings at Phu Kham

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Environmental Code of Practice for metal mines appendix 1

The Environmental Code of Practice for Metal Mines describes operational activities and associated environmental concerns of this industrial sector The document applies to the complete life cycle of mining from exploration to mine closure and environmental management practices are recommended to mitigate the identified environmental concerns

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Technical Document Acid Mine Drainage Prediction

Acid Mine Drainage Prediction compares acid rock drainage factors of waste rock piles and tailings impoundments In examining this table it is important to note that diffusion of oxygen into water is slow and therefore oxidation of iron sulfide is inhibited until the water level drops which can occur periodically or seasonally in some cases

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EVALUATION OF ALTERNATE DRY COVERS FOR THE

Special industry-government task forces such as the Mine Environment Neutral Drainage (MEND) program were established to address acid mine drainage and its control This study on the Evaluation of Alternate Dry Covers for the Inhibition of Acid Mine Drainage from Tailings represents part of the ongoing acid mine drainage (AMD) research effort

Get price

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Control of acid rock drainage from mine tailings through

Acid mine drainage detrimentally affects thousands of surface watercourses throughout the world and costs tens of millions of dollars annually in site remediation expenditures This process is accelerated by the activity of iron- and sulfur-oxidizing bacteria which grow chemolithotrophically in mine tailings

Get price

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Costs of Remediation at Mine Sites

----- Costs of Remediation rock to minimize infiltration should be considered in conjunction with other control methods such as impermeable covers to further reduce infiltration 2 2 Underground Mine Drainage The environmental problems resulting from acid drainage from underground mines are similar to those from waste rock piles

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A laboratory study of covers made of low

Nov 14 2003Covers with capillary barrier effects (CCBE) are considered to be one of the most effective ways to control acid mine drainage (AMD) production from mine wastes The use of low-sulphide tailings in CCBE has been proposed recently for cases where other types of material may be unavailable near the mining site This paper presents leaching column test results showing that CCBEs with a

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Review of Disposal Reprocessing and Reuse Options for

The treatment of acidic mineral effluents such as acidic drainage (AD) acid mine drainage (AMD) acid rock drainage (ARD) and process water is commonly accomplished through lime neutralization This centuries old technology is effective in raising the pH of the

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