• Striking truth: Midas Gold mining plan is bad idea for ...

     · Midas Gold claims that the liners it plans to place below, and the soil covers on top, of its mine tailings will entirely prevent the type of contaminated seepage documented in the 2013 Earthworks ...

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  • Precious Metals Reclamation Mining Company

    Apache Mill Tailings USA, Inc. is a precious metals mining company specializing in gold, silver, copper and high value, rare earth minerals reclamation recovery. To maximize profits, accelerate project success and reduce risk, we work with above ground mine and ore mill tailings deposits. Reclaiming …

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  • The Toxic Landscape of Johannesburg''s Gold Mines | WIRED

     · More than a century of gold mining has left towering piles of bleached mine waste, known as "tailings," all over Johannesburg''s landscape. Discovery of gold …

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  • FINDING GOLD IN TAILING PILES

    MW Mining & Inspections, Inc. is in the business of harvesting "Fallen Gold" and other precious metals & minerals directly from old above-ground mill & mine tailing waste-dumps. We choose "high-grade" sweet-spot mining claims in prime areas of known gold mining districts.

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  • Surface recovery

    Ergo Gold Mining Proprietary Limited (Ergo), one of the world''s largest gold surface tailings retreatment facilities, owns the rights to treat around 100 sand dumps and slimes dams on the Witwatersrand. Some of these are currently being treated. Sand and slime

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  • New approaches for extracting and recovering metals from ...

     · Mine tailings may contain base transition metals, such as iron, copper, nickel and zinc, in relatively high concentrations, and also occasionally precious metals such as gold and silver, in minerals (and native metals) that have been not been separated by froth flotation (e.g. Bryan et …

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  • Tailings Dump Processing

     · Metal detectors can be used to identify hidden silver and gold nuggets that were not exposed in the rock. Back during the late 1970''s Silver boom suspected to be caused by the Hunt brothers, a silver mine known as the Silver Dime Mine had all of the tailings loaded up and shipped to a smelter to recover the silver.

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  • The Wake of South Africa''s Abandoned Gold Mines

    Sibanye Gold has setup a massive project to reclaim this mine dump, reprocess all the materials, extract a lot left over Gold from the early years of Gold Mining and rehabilitate this area which once was a wetland. Sibanye Gold had estimated that by 2018 this project would be completed and the area restored to the wetland it once was.

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  • SC gold mine could generate billions, but problems surface ...

     · Gold mine expansion could produce $2.5 billion. But environmental problems linger. A gold mine that is seeking to expand in Lancaster County has again drawn state scrutiny for violating ...

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  • Old Mine Tailings: New Mother Lode For Rare ...

     · Some mine tailings in the U.S. have already been re-worked--for gold: Starting in the 1980s, technological advances, coupled with the rising price of gold, made it …

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  • Environmental Risks From Mine Tailings

     · Tailings deposited as large piles can cause a variety of environmental problems: Slumps, landslides. Tailing piles can be unstable, and experience landslides. In 1966, in Aberfan, Wales, a …

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  • Rare Earth Reclamation Mining Company

    Apache Mill Tailings USA, Inc. is a precious metals mining company specializing in gold, silver, copper and high value, rare earth minerals reclamation recovery. To maximize profits, accelerate project success and reduce risk, we work with above ground mine and ore mill tailings deposits.

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  • Reclaiming Hard Rock Mines

    hard rock Bullion Mine produced gold, silver, lead, zinc, and copper through the 1950''s (Nimick 1999). The abandoned Bullion Mine contained an unstable hillslope with tailings piles, waste rock and acid mine drainage (AMD; Figure 1). Waste rock, the soil and rock material removed with ore extraction, and tailings, which are created during

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  • Geotechnical Properties of Mine Tailings | Journal of ...

    Characterization of the Tailings. The basic geotechnical properties of the four tailings are summarized in Table 1, and Fig. 1 displays the grain size distributions. The specific gravity of the coarse and fine iron tailings are 3.23 and 3.08, respectively, which are consistent with those of metal tailings but much higher than those of natural soils.

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  • Circular economics, reprocessing waste and mining

     · The Nevada-based company is looking at ways of recovering mercury from tailings dumps. Mercury is one of the banes of mining, including artisanal gold mining. In …

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  • Hazard Management: Managing Chemical Hazards at …

    Walker Mine Tailings Site The 100-acre Walker Mine Tailings site is on the Plumas National Forest, Plumas County. During its operation (1915 - 1941), the Walker Mine produced large quantities of copper, and the Mine''s mill deposited fine-grained, sandy, silty, and clayey tailings that filled the drainage below.

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  • Artisanal Gold Mining: A Dangerous Pollution Problem ...

    Artisanal Gold Mining: A Dangerous Pollution Problem by Blacksmith Institute Mercury attacks the central nervous system, affects brain functioning and, in extreme cases, exposure will lead to death. Despite being commonly overlooked, industrial pollution still poses a significant threat to human health, particularly in the case of artisanal gold mining. Global Toxic Pollution – Under […]

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  • BIOSOLIDS USE FOR RECLAIMING FLUVIAL MINE TAILINGS

    417 BIOSOLIDS USE FOR RECLAIMING FLUVIAL MINE TAILINGS C.L. Freeman 1, J.A. Ippolito 2, M.E. Stromberger 1, K.A. Barbarick 1, and E.F. Redente 3,4 1Department of Soil and Crop Sciences C-127 Plant Sciences Building Colorado State University Fort Collins, CO 80523-1170

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  • Gold Mining Process Development – Denver Mineral Engineers

    At a slurry concentration of 50% solids, the slurry passes. through a series of agitated mixing tanks with a residence time of 24 hours. The gold bearing liquid is then separated from the leached solids in thickener. tanks or vacuum filters, and the tailings are washed to remove gold …

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  • Recovering Cyanide From Gold Plant Tailings

    of the general public for the gold mining industry, due to several highly . publicized cyanide spills in recent years (breaches of tailings dams, accidents involving trucks carrying cyanide to gold plants, etc.). The cost of recovering and recycling cyanide from tailings will generally . be lower than the cost of purchasing new cyanide.

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  • Forgotten Gold – Searching Abandoned Mines and Tailings

     · Gold prospecting metal detectors help recreational prospectors find gold nuggets & discarded ore deposits containing gold. Mines and tailing piles are common places for finding long forgotten gold. ... Searching Abandoned Mines and Tailings Share …

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  • Prospecting Gold Tailing Piles with a Metal Detector

    If you are searching for a big gold nugget in dredge tailings, the best tool for the job is a metal detector. With a metal detector you can cover a lot of area, unlike other types of equipment where you are limited to a small area to search. That is not to say that you can''t use any method you want to, but if you are specifically seeking out ...

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  • Arsenic in Historic Gold Mine Tailings

    Arsenic and Gold Mine Tailings FAQ What is arsenic? Arsenic is a natural element that can be found distributed throughout the Earth''s crust. It is found in arsenopyrite, the same rock in which gold is often embedded. Many areas of Nova Scotia have elevated arsenic levels, not just the gold mine tailing sites.

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  • Converting Tailings Dumps into Mineral Resources | Energy ...

    Similarly, tailings dumps arising from the processing of chrome ore in the Lower Group reefs of the BC are also being retreated to recover PGEs. Several commercially profitable enterprises have also been set up with the sole intention of retreating tailings dumps arising from South Africa''s Witwatersrand gold processing operations.

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  • Tensions flare over environmental threat of Canadian gold ...

     · Kumtor gold mine in the Tian Shan mountains, 350km south-east of Kyrgyzstan''s capital, Bishkek. Kumtor is the largest open-pit mine in Central Asia.

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  • Reclaiming the mines of America – Harvard Gazette

     · The average wedding ring contains about two-tenths of an ounce of gold, or $88 worth, according to the latest market prices. It almost seems like a bargain when you consider that in order to produce that much gold, 60 tons of ore must be gouged out of the ground, crushed into small pieces, then leached from its mineral matrix with a weak cyanide compound.

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  • From Tailings to Treasure? Miners Make Money Reprocessing ...

     · DRD Gold extracted 33,600 ounces of gold, worth nearly US$40 million, in the last quarter of 2013. 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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  • Mine tailing disposal sites: contamination problems ...

     · Thus, mine tailings in many abandoned mines are a long-term environmental problem with unacceptable damage to environment and intolerant risk to human health. Hence, mine tailing sites require continuous monitoring and interventions, which impose unbearable costs to the mining industry and society (Jambor et al. 2003 ).

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  • Gold Tailings: Hazards and Opportunities | INN

    This article was first published on Gold Investing News on August 2, 2011. Tailings from gold mining operations can pose a threat to the environment and health of nearby communities.

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  • Treasure from trash: how mining waste can be mined a ...

     · Tailings dumps can be gold mines – literally, in some cases. The opportunity Society''s appetite for commodities is shifting in favour of critical or strategic metals such as lithium, indium ...

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  • Gold in them there tailings? | News | helenair

    EVE BYRON - IR Staff Writer - 12/08/04. A ia City man wants to mine the old mill tailings near Marysville, and he believes he can recover around $9 million in gold from the piles, as well as ...

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  • Re-Processing Gold Tailings in South Africa

    historic gold tailings dams in the Witwatersrand area of South Africa is being investigated. The objective is to recover uranium and residual gold from the tailings, as well as to oxidize the sulphides to eliminate long term environmental liabilities associated with acid mine drainage. The tailings from the re-processing plant will be re-

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  • Dirty Gold''s Impacts

     · Gold mining is one of the most destructive industries in the world. It can displace communities, contaminate drinking water, hurt workers, and destroy pristine environments. It pollutes water and land with mercury and cyanide, endangering the health of people and ecosystems. Producing gold for one wedding ring alone generates 20 tons of waste.

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  • THE COMPOSITION AND STATE OF GOLD TAILINGS

    In-situ densities and void ratios for gold tailings. 2-67 Permeability values for gold tailings. 2-69 Coefficient of Compressibility, C. e, of gold tailings. 2-71 Coefficients of consolidation, c. v, for gold tailings. 2-72 Static shear strength parameters for gold tailings. 2-74 . Mine Metallurgical Report for Mizpah Whole Tailings (March 1997 ...

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  • John Chadwick considers one of the world''s largest gold ...

    of getting value from old mines, in addition to redeveloping old mines. DRDGOLD is a mid-tier, unhedged gold producer and the only South African mining company to focus solely on the retreatment of surface gold tailings. It has bold plans with Sibanye-Stillwater for a massive dump retreatment project. DRDGOLD CEO Niël Pretorius says the

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  • Tailings Backfill of Tailings to Underground Workings

    Tailings can be stored below ground in previous worked out voids. The tailings are generally mixed with a binder, usually cement, and then pumped underground to fill voids and help support an underground mine. For example a ''room and pillar'' mining operation that uses backfill will be able to extract the insitu pillars containing ore.

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  • Rich history of gold mining left problems for Colorado ...

     · Rich history of gold mining left problems for Colorado Springs. George Hager stands near a pipe that drains the sand, water, and tailings mixture …

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