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Copper Sulfide Mining - Earths

Copper Sulfide Mining. A peer-reviewed study of the track record of water quality impacts from copper sulfide mines found severe impacts to drinking water aquifers, contamination of farmland, contamination and loss of fish and wildlife and their habitat, and risks to public health.

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What is Sulfide Mining? Mining Action Group

Metallic sulfide mining (aka hard rock mining) is the pract of extracting metals such as nickel, gold and copper from a sulfide-rich ore body. Sulfides are a geologic byproduct of mining in this area, and by exposing sulfides to the air and water in our atmosphere, sulfuric acid can be created — threatening to poison the nearby water

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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. Ps 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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The Threat of Sulfide Mining — Friends of the Boundary

Sulfide mining, which is sometimes referred to as hard-rock mining, is the process of extracting trace amounts of copper, nickel and other metals from sulfide ores. When sulfide ore comes into contact with water or oxygen, a chemical reaction occurs and produces sulfuric acid,

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Copper extraction - Wikipedia

OverviewHistoryConcentrationFroth flotationHydrometallurgical extractionSulfide smeltingConcentrate and copper marketingSee also

Copper extraction refers to the methods used to obtain copper from its ores. The conversion of copper consists of a series of physical and electrochemical processes. Methods have evolved and vary with country depending on the ore source, local environmental regulations, and other factors. As in all mining operations, the ore must usually be beneficiated (concentrated). The processing techniques depend on the nature of the ore. If the ore is primarily sulfide copper minerals (such as chalcopyrite), th

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Sulfide Mining, Mining Methods, Techniques, Copper, Zinc

Mining is the method of tacking materials from the earth to get valuable metal ores like copper, zinc, and lead, which are known as target minerals in mining terms. Metal ores like copper, zinc and lead are minute quantities contrasted to the whole composition of the earth.

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Sulfide Mining Overview - Save Our Sky Blue Waters

Mining. Sulfide mining operations can take several forms depending on the ore body and quality. Mines are either open pit mines or underground operations. Open pit mines are most commonly used, 83 percent of copper mines in the US are open pit.14 This method is used because a greater

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In Minnesota, when it comes to pro-sulfide-mining rhetoric

On July 18, 2019, Twin Metals Minnesota suddenly announced it would use dry stacking for tailings waste at its proposed copper-nickel sulfide mine adjacent to Minnesota’s Boundary Waters Canoe

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Sulfide mining: the most fateful decision Minnesota will

Dec 12, 2017  Sulfide mining is the most fateful decision Minnesota will ever make. Do not let anyone make it for you. This attempt is the only viable way to fight copper sulfide mining and

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Acid mine drainage - Wikipedia

The most commonly mined ore of copper, chalcopyrite, is itself a copper-iron-sulfide and occurs with a range of other sulfides. Thus, copper mines are often major culprits of acid mine drainage. At some mines, acidic drainage is detected within 25 years after mining begins, whereas at other mines, it is not detected for several decades.

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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 Mining and Extraction Sulfide Ores

Copper Mining and Extraction: Sulfide Ores. Share Education Resources Copper Mining and Extraction: Sulfide Ores . It’s hard to imagine a world without copper. We rely on copper for power, lighting, heating, communications, water supply and transport. Copper makes our homes, schools and businesses efficient, comfortable and decorative and it

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The Threat Save the Boundary Waters

Sulfide-ore copper mining is much more toxic than Minnesota’s taconite mining. It produces giant waste piles that, when exposed to air and water, leach sulfuric acid, heavy metals and sulfates. Sulfide-ore copper mines pollute groundwater, rivers and lakes. In the history of sulfide mining, pollution has never been avoided.

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Sulfide Mining Sierra Club

The mining of copper/nickel sulfide ores is a toxic type of mining that is risky to our environment, our ers and communities, and local economies. Mining sulfide rock releases acid and toxic metals and contaminants that pollute rivers and groundwater for hundreds of years, long after the profits are spent and the products buried in landfills.

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Toxic Mine Waste. The Dangers of Copper Sulfide Mining

Jul 31, 2019  Copper Sulfide Mining is NOT Necessarily Good for Jobs or Fishing. The acid mine-polluted water in the Rio Tinto river has also seriously contaminated the once fertile (and now barren) fisheries where the river flowed into the Gulf of Cadiz (near the Strait of Gibraltar). The same can be said for Railroad Creek and Lake Chelan.

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McCollum Statement on State Department Response to Sulfide

“Just like the U.S. Forest Serv, U.S. Department of Agriculture, and the Department of Interior have repeatedly ignored the potentially poisonous effects of sulfide-ore copper mining on the Boundary Waters Canoe Area Wilderness, the State Department is willing to ignore the toxic consequences of acid mine drainage on Canada’s natural

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Copper Ore Types: Sulfides vs. Oxides An Investor's

Copper Ore Types: Sulfides vs. Oxides. Copper sulfide ores are having a good handle on this information can be an important part of deciding which companies involved in mining the red

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Mining Industry Copper Sulfide Ore and Flotation Process

Jul 09, 2019  (2) Copper-sulfur ore Called copper-bearing pyrite. In addition to copper minerals, iron sulfide can be recovered, and the main mineral of sulfur is pyrite. (3) Copper pyrite ore Except for the copper minerals, pyrite and magnetite are worth recovering. Many of the skarn-type copper mines in China belong to this type.

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Inside Sen. Amy Klobuchar's Mining Industry Support In

She wanted to know specifically Klobuchar's about "support of sulfide mining, against the interests of the majority of her constituents, the local economy, clean water, and tribal sovereignty

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Trump administration renews mining leases near Minnesota

Dec 23, 2017  Trump administration renews mining leases near Minnesota wilderness, reversing Obama A person on a canoe paddles on one of the many waterways in Minnesota’s Boundary Waters Canoe Area Wilderness.

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Metallic Sulfide Mining Sierra Club

What is metallic sulfide mining? Metallic sulfide mining — also known as hard rock mining — involves extracting valuable metals, like copper or zinc, from sulfide ores, which are rocks and sediments that contain minerals bonded with sulfur ions.

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glifwc

copper, and lead mining is often to as sulfide mining, and the re- Chapter One lease of various forms Of sultilr is an inevi- table by-product of the metals' extraction. Basic Geology and Exploration Copper, zinc, and lead are widespread in the rocks Of the eart I's crust, but ordinarily in minute quantities. Copper

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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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Copper-Nickel Studies and Non-ferrous Mining - Minnesota

Minnesota Issues Resource Guides Copper-Nickel Studies and Non-ferrous Mining. This guide is compiled by staff at the Minnesota Legislative Reference Library on a topic of interest to state legislators. It introduces the topic and points to sources for further research. It is not intended to be exhaustive.

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Metallic Sulfide Mining Sierra Club

What is metallic sulfide mining? Metallic sulfide mining — also known as hard rock mining — involves extracting valuable metals, like copper or zinc, from sulfide ores, which are rocks and sediments that contain minerals bonded with sulfur ions.

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glifwc

copper, and lead mining is often to as sulfide mining, and the re- Chapter One lease of various forms Of sultilr is an inevi- table by-product of the metals' extraction. Basic Geology and Exploration Copper, zinc, and lead are widespread in the rocks Of the eart I's crust, but ordinarily in minute quantities. Copper

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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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Copper-Nickel Studies and Non-ferrous Mining - Minnesota

Minnesota Issues Resource Guides Copper-Nickel Studies and Non-ferrous Mining. This guide is compiled by staff at the Minnesota Legislative Reference Library on a topic of interest to state legislators. It introduces the topic and points to sources for further research. It is not intended to be exhaustive.

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McCollum introduces bill to ban sulfide-ore mining within

Sulfide-ore copper mining is one of the most toxic industries in America, and doesn’t belong anywhere near the Boundary Waters,” Landwehr said in a statement. “Unfortunately, the Trump

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Top 10 Reasons To Stop Twin Metal’s Sulfide Mining

Backcountry Hunters Anglers is the sportsmen’s vo for our wild public lands, waters and wildlife. And the Minnesota chapter of Backcountry Hunters Anglers (BHA) has been fighting to protect northern Minnesota’s waterways, watersheds and wildlife from proposed sulfide-ore copper mines for going on a decade now.

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Toxic Mine Waste. The Dangers of Copper Sulfide Mining

Jul 31, 2019  Copper Sulfide Mining is NOT Necessarily Good for Jobs or Fishing. The acid mine-polluted water in the Rio Tinto river has also seriously contaminated the once fertile (and now barren) fisheries where the river flowed into the Gulf of Cadiz (near the Strait of Gibraltar). The same can be said for Railroad Creek and Lake Chelan.

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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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Duluth for Clean Water

Duluth for Clean Water is an all-volunteer 501c4 organization seeking a healthy future for the St. Louis River and Lake Superior watershed. We oppose the Glencore/PolyMet copper sulfide mining proposal as a health and safety threat to downstream communities. Click Here to Learn More About Copper Sulfide Mining

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New approaches for extracting and recovering metals from

The off-line system used allowed the copper present in PLS to be precipitated selectively without the need to adjust the pH of the PLS, though small amounts of silver present in PLS from one of the tailings samples co-precipitated with copper sulfide.

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Rep. McCollum introduces bill to ban mining near the

Jan 15, 2020  Environmental groups often refer to this type of hard-rock mining as “copper-sulfide” mining, because it refers to minerals that are bound up in

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Sulfide Mining Fact Sheet - MEPartnership

Sulfide Mining Fact Sheet Sulfide Mining and Minnesota’s Wild R Sulfate Standard Impact of Mining on Sulfate Levels in Minnesota The type of pollution that comes from sulfide mining is particularly dangerous to wild . Our state grain is extremely sensitive and more vulnerable to pollution and habitat loss than other species.

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Antofagasta and the Hidden Dangers of Copper Mining

Sep 11, 1973  But the toxicity of the tailings of copper and nickel mining isn’t confined to the highly acidic pH. The lethality of the tailings also involves other sulfide ore-related heavy metals, such as Lead, Arsenic, Nickel, Zinc, Cadmium, Vanadium, Antimony, Manganese and Mercury.

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Perdue to McCollum: Boundary Waters Environmental Review

May 25, 2017  Congresswoman Betty McCollum (DFL-Minn.) today received assurances from U.S. Secretary of Agriculture Sonny Perdue that the Trump administration will proceed with the two-year, science-based study of whether dangerous copper-sulfide ore mining should be permitted on federal lands in the watershed that flows into Minnesota’s Boundary Waters Canoe Area Wilderness (BWCAW).

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Rep. McCollum introduces bill to ban mining near the

Jan 15, 2020  Environmental groups often refer to this type of hard-rock mining as “copper-sulfide” mining, because it refers to minerals that are bound up in

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Sulfide Mining Fact Sheet - MEPartnership

Sulfide Mining Fact Sheet Sulfide Mining and Minnesota’s Wild R Sulfate Standard Impact of Mining on Sulfate Levels in Minnesota The type of pollution that comes from sulfide mining is particularly dangerous to wild . Our state grain is extremely sensitive and more vulnerable to pollution and habitat loss than other species.

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Antofagasta and the Hidden Dangers of Copper Mining

Sep 11, 1973  But the toxicity of the tailings of copper and nickel mining isn’t confined to the highly acidic pH. The lethality of the tailings also involves other sulfide ore-related heavy metals, such as Lead, Arsenic, Nickel, Zinc, Cadmium, Vanadium, Antimony, Manganese and Mercury.

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Copper Mining and Extraction: Oxide Ores

Extraction of sulfide ores is covered in more detail in Copper Mining and Extraction: Sulfide Ores (1114), but is introduced here because an important by-product of this process is used for the extraction of oxide ores. Pyroprocessing Sulfide Ores Provides Acid for Leaching.

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Sulfide Mining Conservation Minnesota

Conservation Minnesota has a consistent record of calling for accountability when it comes to the various Sulfide Mining proposals currently being debated in the state. We seek accountability from the state, the mining companies and the various other stakeholders in Continue reading →

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Study of copper-nickel mining's effect on Boundary Waters

“This confirms the copper-sulfide mining industry, and their allies in the Trump administration and Congress, have a decidedly anti-science agenda," Chris Knopf, executive director of Friends of

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Copper Mining and Processing: Resources and Glossary

For copper sulfide ore, electrolysis is the final stage in the process of pyrometallurgy, in which anode copper ss are hung in a large tank full of a copper-based electrolyte solution and an electric current is applied, resulting in the plating of copper onto 99.9% pure copper cathodes.

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Perdue to McCollum: Boundary Waters Environmental Review

May 25, 2017  Congresswoman Betty McCollum (DFL-Minn.) today received assurances from U.S. Secretary of Agriculture Sonny Perdue that the Trump administration will proceed with the two-year, science-based study of whether dangerous copper-sulfide ore mining should be permitted on federal lands in the watershed that flows into Minnesota’s Boundary Waters Canoe Area Wilderness (BWCAW).

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Mining - Minnesota Center for Environmental Advocacy

But if copper-nickel mining is to occur in Minnesota, it cannot sacrif clean water for generations. MCEA is currently involved in litigation to protect that legacy for our children and grandchildren. We have challenged the land exchange for the PolyMet project in federal court, and are awaiting a hearing on our lawsuit. Sulfide mining in

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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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In Northern Minnesota, Two Economies Square Off: Mining vs

Oct 12, 2017  A telephone survey that Rom’s organization commissioned from Fabrizio Ward, a polling company that ed for the Trump campaign, found that state residents oppose sulfide-ore copper mining

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Innovations: Introduction to Copper: Mining Extraction

The barren rock, or gangue has to be separated from the sulfide minerals in order to smelt the metallic copper from the ore. By far the greatest proportion of copper is extracted from the sulfides of copper, iron and sometimes other metals. Such ores originate from sulfur-bearing volcanic magmas, which have separated into metal sulfides and silous melts.

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Effect of Copper Sulfate on Zinc Sphalerite Flotation

Copper sulfate, when used as an activator in flotation of sphalerite, forms an invisible but physically detectable film of cupric sulfide on the surface of the sphalerite particles, as evidenced by increased electric conductivity, by chemical metathesis, and by the ability to deactivate with solutions of alkali cyanides, which are known as solvents of copper sulfides.

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12.3 Primary Copper Smelting

Copper is produced in the U. S. primarily by pyrometallurgical smelting methods. Pyrometallurgical techniques use heat to separate copper from copper sulfide ore concentrates. Process steps include mining, concentration, roasting, smelting, converting, and finally fire and electrolytic refining. 12.3.2 Process Description2-4

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