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The great sulfide mining divide: You can't save the BWCA ...

Sulfide-ore mining is dangerous everywhere and most dangerous in wet environments. And the Boundary Waters is nothing if not wet. ... The waste from PolyMet's copper-nickel sulfide mine would ...

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Copper Ore Types: Sulfides vs. Oxides | Investing News Network

Copper sulfide ores are typically the most profitable types of copper ores to mine. That is because they have high copper content, and the copper in them can more easily be separated from unwanted ...

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From Ore to Finished Product - copper

Copper - From Beginning to End. Copper is a major metal and an essential element used by man. It is found in ore deposits around the world. It is also the oldest metal known to man and was first discovered and used about 10,000 years ago. And as alloyed in bronze (copper-tin alloy) about 3000 BC, was the first engineering material known to man.

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Copper sulfide ore: Mineral information, data and localities.

Quick NavTop About Copper sulfide ore Classification Mineralogy Age distribution Internet Links Mineral and/or Locality Mindat is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization.

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Save the Boundary Waters

The Boundary Waters Canoe Area Wilderness is threatened by sulfide-ore copper mining. The Campaign to Save the Boundary Waters is leading the effort to ensure permanent protection for the Boundary Waters Wilderness, America's most visited Wilderness and Minnesota 's crown jewel, from proposed sulfide-ore copper mining. TAKE ACTION NOW

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From Ore to Finished Product - copper

Copper - From Beginning to End. Copper is a major metal and an essential element used by man. It is found in ore deposits around the world. It is also the oldest metal known to man and was first discovered and used about 10,000 years ago. And as alloyed in bronze (copper-tin alloy) about 3000 BC, was the first engineering material known to man.

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The Uncertain Future of the Boundary Waters | Outside Online

May 20, 2019 · A 2012 study by the nonprofit Earthworks reviewed 14 U.S. sulfide-ore copper mines—­predominately open-pit—which produced 89 percent of the country's copper in .

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Mining threatens Minnesota's pristine Boundary Waters

Jan 20, 2018 · The sulfide-ore mining process used to extract copper and nickel pollutes waters with acid, arsenic, mercury and lead. Minnesota Gov. Mark Dayton also declared lands adjacent to .

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Copper Smelting Chemistry Tutorial - AUS-e-TUTE

A typical copper ore contains between 0.5% and 2.0% copper. A high grade ore produces a high yield of metal. A low grade order produces a low yield of metal. Copper can be extracted from sulfide ores (usually higher grade ores) by direct smelting. The earliest evidence of copper smelting occurs in Serbian artefacts dating from around 5000 BC.

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Copper sulfide - Wikipedia

Clean water or mining pollution for the nation's favorite ...

The aggressive push by the Trump administration to force approval of a sulfide-ore copper and nickel mine in northern Minnesota's Superior National Forest will almost certainly pollute the ...

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Boundary Waters Business Coalition

Boundary Waters Business Coalition Boundary Waters Canoe Area Wilderness, Minnesota . About Us. Local, state, regional and national businesses support permanent protection for the Boundary Waters Canoe Area Wilderness from risky sulfide-ore copper mining proposed on .

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Treatment of Mixed Sulfide Oxide Ores of Copper

Many of our largest copper deposits contain both sulfide and oxidized copper minerals. The large porphyry mines, with a total copper content of from 1.3 to 2.0 per cent., send to their mills ore with an oxide content of from 0.2 to 0.4 per cent.

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Top 10 Reasons To Stop Twin Metal's Sulfide Mining ...

    1. Failure Rate. To date, mining companies are unable to point to a sulfide mine that has ever .Get Price

The great sulfide mining divide: You can't save the BWCA ...

Sulfide-ore mining is dangerous everywhere and most dangerous in wet environments. And the Boundary Waters is nothing if not wet. ... The waste from PolyMet's copper-nickel sulfide mine would ...

Get Price

Science Desk: How Sulfide-Ore Copper Mines Pollute | Save ...

May 08, 2015 · Have you ever wondered just how sulfide-ore copper mines pollute their surrounding environments? It's a good question, because in order to understand the environmental impacts to the Boundary Waters Canoe Area Wilderness and Voyageurs National Park, we must first understand all of the ways sulfide-ore copper mining can cause harm to the surrounding lakes, streams, wetlands and .

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Copper Mining and Processing: Processing of Copper Ores ...

Copper processing is a complicated process that begins with mining of the ore (less than 1% copper) and ends with sheets of 99.99% pure copper called cathodes, which will ultimately be made into products for everyday use.The most common types of ore, copper oxide and copper sulfide, undergo two different processes, hydrometallurgy and pyrometallurgy, respectively, due to the different ...

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Copper extraction - Wikipedia

Sulfide ores. Secondary sulfides – those formed by supergene secondary enrichment – are resistant to sulfuric leaching.These ores are a mixture of copper carbonate, sulfate, phosphate, and oxide minerals and secondary sulfide minerals, dominantly chalcocite but other minerals such as digenite can be important in some deposits.. Supergene ores rich in sulfides may be concentrated using ...

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LEACHING OF A ROASTED COPPER SULFIDE ORE - academia.edu

Sulphide ores of copper are insoluble in dilute sulphuric acid leaching solutions, but a very high extraction can be obtained if the copper ore is in the oxidized condition. The problem is to convert the sulphide into the oxide form. This can be done

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SULFIDE MINING - Minnesota Center for Environmental ...

Although Minnesota has a long history of iron ore mining, sulfide mining for copper, nickel, and precious metals has never been attempted. Prices for some metals, including copper, reached historic highs in 2011, and some companies have sought to mine Minnesota's low-grade sulfide ores.

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Sulfide Ore Processing « TCB Metals and Refining

Sulfide Ore Processing. Home → Sulfide Ore Processing . Processing Sulfide Ores. Historically, miners have shipped their sulfide concentrates to overseas smelters that have little to no regulations or emissions controls. However, with the implementation of the Mercury Export Ban of 2008 and the high costs of installing equipment to prepare ...

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