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An example of an effective sulfide mine is the smaller Flambeau Mine at Ladysmith Wis Kennecott was the operator of this openpit copper sulfide mine that operated 140 feet from the Flambeau River in
From sulfide ores Sulfide ores are crushed and ground in order to liberate nickel minerals from the waste materials by selective flotation In this process the ore is mixed with special reagents and agitated by mechanical and pneumatic devices that produce air bubbles
Hardrock Mining Environmental Impacts Overview The major metallic sulfide of concern is iron sulfide FeS 2 or pyrite Other metal sulfides that contribute to acid generation include lead sulfide galena zinc sulfide sphalerite and iron copper sulfide chalcopyrite Erosion is the process by which soil particles are detached
McCollum introduces bill to ban sulfideore mining within BWCA watershed also does not ban the mining of iron ore taconite sand gravel and granite within that area if it is determined water
Aug 03 2019· Lime in Gold Ore Mining Process August 3 2019 August 3 2019 by JXSC Mining etc with xanthate collectors the ore usually contains a certain amount of iron sulfide minerals such as pyrite marcasite pyrrhotite arsenopyrite etc inhibiting iron sulfide minerals with
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 The fine coating of a iron compound definitely appears to be a key component of the inability of cyanide to efficiently leach low grade pyritic ores
Mar 04 2020· Mineral processing The most important sulfide sources the coppercobalt ores of Congo Kinshasa and Zambia are processed in the conventional manner to produce a coppercobalt concentrate This is then treated by flotation to separate a cobaltrich
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 Minnesotas lowgrade sulfide ores
Pyrite is a brassyellow mineral with a bright metallic luster It has a chemical composition of iron sulfide FeS 2 and is the most common sulfide mineral It forms at high and low temperatures and occurs usually in small quantities in igneous metamorphic and sedimentary rocks worldwide Pyrite is so common that many geologists would
Metallic sulfide mining aka hard rock mining is the practice of extracting metals such as nickel gold and copper from a sulfiderich 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 environment and communities
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 1232 Process Description24 Mining produces ores with less than 1 percent copper Concentration is accomplished at the
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 lasts for many years
Aug 24 2010· Sulfide Mining Near BWCA The BWCA is facing a major turning point in its history and needs level heads and calm minds to determine the proper way to proceed We are faced with the contentious issue of nonferrous sulfide mining in or near the lakes and streams of the BWCA
Energy and Environmental Profile of the US Mining Industry 6 Lead and Zinc Lead and zinc ores are usually found together with gold and silver A leadzinc ore may also contain lead sulfide zinc sulfide iron sulfide iron carbonate and quartz When zinc and lead sulfides are present in profitable amounts they are regarded as ore minerals
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 Coppersulfur ore Called copperbearing pyrite In addition to copper minerals iron sulfide can be recovered and the main mineral of sulfur is pyrite
Mining and Pollution When iron sulfide minerals are exposed to the atmosphere and water the water becomes acid and enriched in iron that eventually leaves yellow and reddish deposits in its wake Other metal sulfides also react with the atmosphere and water to release toxic metals such as arsenic cadmium cobalt copper nickel and zinc
Sulfide mining is different from traditional iron ore mines and taconite mining sometimes referred to as ferrous mining Sulfide mines have never been operated safely – no mine of this type has been known to have operated and closed without polluting local lakes rivers or
Pyrophoric Iron FeS is a form of iron sulphide that combusts on exposure to oxygen in this case with air It is formed by reaction of hydrogen sulphide with carbon steel The iron in the steel reacts with hydrogen sulphide to create an iron crust scale on the metal surface
What is coppersulfide mining Sulfide mining which is sometimes referred to as hardrock 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 which is the same as battery acid
Copper smelting is a 3 stage process First the iron is removed by heating the ore with silica The iron is oxidised and reacts with the silica to form a slag which can be drawn off separately Next the remaining copper sulfide is heated to a higher temperature and air blown through to
Iron mining is significantly different than nonferrous or sulfide mining Because of the magnetic properties of iron and lack of sulfide in its simplest definition iron is mined using water and magnets to pull out the iron And because of the extraction and mining process differences most states
Mine drainage is formed when pyrite an iron sulfide is exposed and reacts with air and water to form sulfuric acid and dissolved iron Some or all of this iron can precipitate to form the red orange or yellow sediments in the bottom of streams containing mine drainage
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