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Sulfide Ore Mining

  • Differences Between Sulfides And Oxides | Difference Between

    Mining has always been a popular business sector in industry. Because of mining, we get to enjoy different jewelries that are made to be durable even over a long period of time. Research has shown that in 2011 mining earned approximately 805 million dollars for the government, which an increase of 114 million dollars from the year before.

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

    Both ore types can be economically mined, though they are processed in different ways. Copper sulfide ores are typically the most profitable types of copper ores to mine. That is because they have .

  • 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 .

  • 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

  • The debate over sulfide mining | MPR News

    May 25, 2006 · But environmentalists are not happy. The term sulfide mining is a lightning rod. On a recent spring day, Minnesota's mining experts met in the Duluth convention center.

  • McCollum Statement on State Department Response to Sulfide .

    "Just like the U.S. Forest Service, 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 .

  • Sulfide Mining | MEPartnership

    These mines, which are different from traditional iron ore mines, have never been operated safely; no mine of this type is known to have operated and closed without polluting nearby lakes, rivers, or groundwater. Sulfide from mining has been shown, by science recently funded by the Legislature, to affect the entire ecosystem.

  • McCollum Statement on State Department Response to Sulfide .

    "Just like the U.S. Forest Service, 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 .

  • Sulfide Mining | Sierra Club

    The mining of copper/nickel sulfide ores is a toxic type of mining that is risky to our environment, our workers 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.

  • SULFIDE MINING

    Sulfide mining, unfortunately, poses several significant environmental risks. The most significant one is the threat to water quality. When sulfide ores are exposed to air and water, the result is sulfuric acid, which causes the leaching of potentially toxic heavy metals and the release of sulfates that contribute to the methylation of mercury.

  • Differences Between Sulfides And Oxides | Difference Between

    Mining has always been a popular business sector in industry. Because of mining, we get to enjoy different jewelries that are made to be durable even over a long period of time. Research has shown that in 2011 mining earned approximately 805 million dollars for the government, which an increase of 114 million dollars from the year before.

  • The debate over sulfide mining | MPR News

    May 25, 2006 · But environmentalists are not happy. The term sulfide mining is a lightning rod. On a recent spring day, Minnesota's mining experts met in the Duluth convention center.

  • Mining Industry | Copper Sulfide Ore and Flotation Process .

    Jul 09, 2019 · 1 Types of copper sulfide ore (1) Single copper mineral Its ore characteristic is relatively simple, and the only useful component that can be recycled is copper. The gangue minerals are mainly quartz, carbonate and silicate. (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.

  • Boundary Waters [MN] | American Rivers

    Threat: Sulfide-ore copper mining. Renowned for its natural beauty, the Boundary Waters Canoe Area Wilderness is the most visited area in the National Wilderness Preservation System. The Boundary Waters are under threat from proposed sulfide-ore copper mining on adjacent lands.

  • The debate over sulfide mining | MPR News

    May 25, 2006 · But environmentalists are not happy. The term sulfide mining is a lightning rod. On a recent spring day, Minnesota's mining experts met in the Duluth convention center.

  • Copper Mining and Extraction Sulfide Ores

    Mining Metals. Metals are often found as compounds in ores. An ore is a rock or mineral that has enough metal in it to make it worth extracting. Mining copper About 200 years ago the UK was an important world source of copper and tin and there were mines in Cornwall and Devon.

  • McCollum introduces bill to ban copper-nickel mining near .

    Opponents of copper-nickel mining say its risk for toxic acid drainage, a result of sulfide ore mixing with oxygen, is too great and would permanently damage Northeastern Minnesota's wilderness areas.

  • Sulfide Mining and Human Health - Save the Boundary Waters

    Sulfide mining differs significantly from iron ore (taconite or ferrous) mining because it has the potential to generate acidic pH. Copper and nickel typically are bound to sulfur in rock. Because of this sulfur bond, they are described as sulfide minerals.3 The chief iron-bearing minerals in iron mining .

  • Acid mine drainage - Wikipedia

    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, .

  • Perdue to McCollum: Boundary Waters Environmental Review .

    May 25, 2017 · Mining is an essential part of multiple-use. It's especially very important in your state, it's also essential for this country. And we can have mining operations that are safe, environmentally safe. We have many that have proven to be able to do that that. You do raise the question about the sulfide-ore.

  • Zinc processing - Ores | Britannica

    Mining and concentrating. Zinc ores are recovered by many mining techniques, ranging from open-pit mining (mainly in the case of oxidized ore bodies, which are located closer to Earth's surface) to the normal underground methods (used for the more deeply located sulfide ores). The most common underground method of ore extraction is cut-and .

  • The great sulfide mining divide: You can't . - MinnPost

    On April 1, in a commentary in the Star Tribune, former Vice President Walter Mondale added, ". we have learned much about the catastrophic consequences of sulfide-ore mining. Above all else .

  • 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 the edge of .

  • Lawsuit Aims to Prevent Mining Pollution near Boundary .

    Jun 25, 2018 · Today, The Wilderness Society, Center for Biological Diversity, and the Izaak Walton League of America, represented by Earthjustice, filed a lawsuit in federal district court in Washington, D.C., to prevent sulfide-ore mining at the edge of the Boundary Waters Canoe Area Wilderness in northeastern Minnesota.

  • The Uncertain Future of the Boundary Waters | Outside Online

    May 20, 2019 · While sulfide-ore mining techniques vary and continue to evolve, in the past some safety records have caused concern. A 2012 study by the nonprofit Earthworks reviewed 14 U.S. sulfide-ore .

  • Sulfide-Ore Copper Mining Boundary Waters . - SCOUTER Forum

    Jan 17, 2019 · In every direction, interconnected waterways laced the forest, and when considering sulfide-ore mining, the issue of water is central. When exposed to air and water, sulfide ore in which copper and other minerals occur creates sulfuric acid and generates heavy metals and other pollutants. This is sometimes called "acid mine drainage."

  • Sulfide Mining in Northeastern Minnesota - Northeastern .

    The Economics of Sulfide Mining. The State of Minnesota is relying on a fatally flawed economic impact analysis to support sulfide ore mining in Northeastern Minnesota. Dr. Evan Hjerpe and Dr. Spencer Phillips found that the UMD study being used to project the Economic benefits of sulfide ore mining is of low quality and limited scope in scope.

  • Sulfide Ore | Article about Sulfide Ore by The Free Dictionary

    Sulfide Ore any of several natural mineral formations consisting of metal sulfides. Metal selenides, tellurides, arsenides, and antimonides are also classified among the sulfide ores. Sulfide ores are an important source for the production of Ni, Co, Cu, Zn, Pb, Mo, Bi, Sb, and Hg. They contain not only sulfides but also other minerals, including .

  • Rcovery of gold in pyritic ores

    Recovery of gold in sulfide ores has fallen into several categories. First is froth flotation, and second is cyanidation of the ores. Using cyanide to recover gold from sulfide ores generally results in 30 to 35% recovery, and the best I have heard of is around 50% recovery.

  • Sulfide Ores - an overview | ScienceDirect Topics

    Sulfide Ores. Sulphide ores were mostly created by (i) the intrusion of molten magma from the mantle into the crust of the earth and (ii) the formation of localized metal-rich sulphide ore bodies by sequential solidification and/or hydrothermal leaching and precipitation.