Our path to permanent protection from sulfide-ore mining includes: Re-initiating a federal 20-year mining ban. Passing permanent protection bills in Congress and the Minnesota legislature. Ongoing litigation to terminate unlawful mining leases. Using science to push back against the proposals and greenwashing from mining companies.
Get MoreSulphide ore of metal are usually concentrated by froth flotation process .Which one of the following sulphide3 ores after an exception and is contrat asked Jun 10, 2019 in Chemistry by KritikaChakraborty ( 89.8k points)
Get MoreAfter milling, sulfide ores may be subjected to chlorination, bio-oxidation, roasting, or autoclaving. Chlorination is not commonly used to oxidize sulfide ores because of high equipment maintenance costs caused by the corrosive nature of the oxidizing agent. Bio-oxidation of sulfide ores employs bacteria to oxidize the sulfur-bearing minerals.
Get MoreIn a process of drying sulfide ore in direct contact with hot drying gases in drying equipment, wherein the process includes processing sulfide ore to produce SO 2 -containing gases, producing sulfuric acid from the SO 2 -containing gases in a contact process plant, and heating up the drying gases with surplus heat from the contact process plant,
Get MoreContact; Upper Peninsula Environmental Coalition; What is Sulfide Mining? Metallic sulfide mining (aka hard rock mining) is the practice 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 ...
Get MoreHigh sulfide gold ore refers to a certain gold ore with 20% -30% of gold wrapped by sulfide (mainly pyrite). Because most of the gold in high-sulfide gold ore exists in the form of sulfide-encapsulated gold, when using direct leaching process, the consumption of gold leaching agent and cost of gold leaching production will increase, and gold processing efficiency is not …
Get MoreAnswer (1 of 2): Sulfides can be found throughout nature and are part of the natural cycle of life. Geologically the Sulfide Class of minerals comprise an economically important class of minerals. Most major ores of important metals such as copper, lead …
Get MoreGeol Ore Deposit 57:570–578. Article Google Scholar Charykova MV, Krivovichev VG, Ivanova NM, Semenova VV (2015b) Thermodynamics of arsenates, selenites, and sulfates in the oxidation zone of sulfide ores. xi. solubility of synthetic chalcomenite analog and zinc selenite at 25 °c. Geol Ore Deposit 57:691–698
Get MoreSulfide ores of orebody 1 (size 420 × 180 m, area 50 700 m 2) were recovered at two TBG stations (St. 37L197g, 37L247g). Sulfide ores of orebody 2 (size 450 × 250 m, area 61 800 m 2) were recovered at four sampling stations, including two TBG stations (St. 37L195g, 37L196g), one dredging station (St. 37L204d), and one BC station (St. 37L077k).
Get MoreDuring high-temperature metamorphism and deformation of sulfide ore bodies, even small proportions of sulfide melt are easily mobilized because their viscosities are very low (e.g. Dobson et al., 2000). Further, the high viscosity contrast between solid sulfide minerals and sulfide melts implies that generally only melt will be mobilized and ...
Get MorePatrick J. Sullivan, ... James J.J. Clark, in The Environmental Science of Drinking Water, 2005 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 …
Get MoreThe traditional route for extracting copper from sulfide ores is smelting. Yet there is a growing case for leaching sulfides from lower grade ore bodies and especially for those ore bodies containing problematic elements like arsenic, which make smelting less economical. Smelting is increasingly expensive because, in general, smelters require a ...
Get MoreCopper sulfide can be divided into single copper ore, copper sulfur ore, copper-molybdenum deposit, copper nickel, carrollite and so on. Basically, only flotation can be considered in its separation. Almost all copper sulphide ores contain iron-bearing sulfides, so in a sense, the flotation of copper sulfide is essentially the separation of ...
Get Morecopper ore samples from the Udokan deposit experimentally showed conditions of copper solutions formation and migration under subzero temperatures [40,41]. Corrosive solution originates at the contact between sulfide ores and atmosphere. By reacting with ores during gravity migration, it forms an oxidation zone.
Get MoreIn the cross section of line 28 for the Y1 intrusion, the massive sulfide ores are distributed in the intrusion, and present with sharp contacts with network olivine gabbro and gabbro with sparsely disseminated sulfides. There was a marked change observed in the whole rock Cu-Ni contents in the ZK157 drill core at 210 m and 340 m ( Fig. 6 a).
Get MoreAltered bitumens occur in proximity to sulfide ore bodies and white sparry dolomite. Their hydrogen/carbon ratios are about 1.02, the sulfur contents average 22 percent, and the δ 34 S values are about +12.4 per mil. These data indicate that some bitumen has participated in the thermochemical reduction of sulfate to produce hydrogen sulfide ...
Get MoreOres used in this Study. Several different types of oxide and sulfide copper ores were tested in this study. Table 1 gives a description of these samples. Assaying of Samples. This study required that a large number of copper, ferrous and ferric iron, and free-acid analyses be …
Get MoreFe skarn model, Hammarstrom and others, this volume). Total sulfide mineral content at the McCoy, Nev., gold skarn is low ( <2 volume percent) and many sulfide minerals are oxidized. In contrast, at the Fortitude, Nev., gold skarn about 30 km to the north, high grade ore is sulfide mineral rich, and includes mostly pyrrhotite as well as
Get More4. Gold sulfide ore Properties of gold sulfide ore Gold sulfide ore is the inorganic compound with the formula Au2S. It is the principal sulfide of gold and decomposes to gold metal and elemental sulfur, illustrating the "nobility" of gold. In nature, the covalent radii of gold sulfide and silver are similar, and the two will form a solid solution.
Get MorePrecipitation of much sulfide ore is thus commonly accomplished by sulfur that was fixed near the site of the ore body by earlier emanations from the magmatic source; a large amount of ore, however, may be precipitated from late-stage magmatic solutions where they mingle with early-stage sulfur-bearing solutions from a different magmatic source.
Get MoreThe Cu-rich ores are sparsely distributed in the orebody and are richer in Pt and Pd than other ores, consistent with fractionation of Cu and PGE during crystallization of sulfide liquid. Breccia and network ores have Pt ranging from 1.72 to 205 ppb, with positive and negative Pt anomalies in primitive mantle-normalized chalcophile element ...
Get MoreSodium Sulfide (Na 2 S) is a commonly used agent in the flotation of sulfide ores. In addition to the above three main functions, sodium sulphide also has the effect of eliminating certain ions in the slurry that are harmful to flotation, because sodium sulphide can form insoluble sulfide precipitates with many metal ions.
Get MoreCopper sulfide ores are typically the most profitable copper ore type to mine. That is because they have high copper content, and the copper in them can more easily be separated from unwanted ...
Get MoreNickel-Cu sulfide ore deposits can occur as single or multiple sulfide lenses within mafic and/or ultramafic bodies with clusters of such deposits comprising a district or mining camp. Typically, deposits contain ore grades of between 0.5 and 3 percent Ni and between 0.2 and 2 percent Cu.
Get MoreSulfide (British English also sulphide) is an inorganic anion of sulfur with the chemical formula S 2− or a compound containing one or more S 2− ions. Solutions of sulfide salts are corrosive. Sulfide also refers to chemical compounds large families of inorganic and organic compounds, e.g. lead sulfide and dimethyl sulfide. Hydrogen sulfide (H 2 S) and bisulfide (SH −) are the …
Get MoreOur alternatives have proven performance in the flotation of copper ores, polymetalic ores and gold associated to sulfides. HOSTAFLOT® collectors are formulated to achieve the best possible recovery and selectivity when needed. …
Get MoreInstead of relying on autoclaves or roasting to prepare a sulfide ore for traditional leaching, our vibratory grinder on our circuit allows our leach to make contact with the precious metal encapsulated in the sulfide so leaching can occur.
Get MoreInstead of relying on autoclaves or roasting to prepare a sulfide ore for traditional leaching, our vibratory grinder on our circuit allows our leach to make contact with the precious metal encapsulated in the sulfide so leaching can occur. With the …
Get MoreThe massive sulfide ores are comprised of pyrite, chalcopyrite and lesser amounts of sphalerite, and are characterized by an increasing content of Au, …
Get MoreThe sulfide ores is easily oxidized in air during the mining and processing. A large quantity of heat by the oxidation reaction resulted from spontaneous combustion of sulfide ores. It would not only threaten the life of employees, but also cause economic losses and environmental issues. Therefore, the spontaneous combustion of sulfide ores is one of the major safety problems in …
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