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Acid mine drainage is generally regarded as the principal environmental problem caused by the mining of sulphide ore deposits. Acid mine drainage results from the reaction of pyritic material with...
Sulfide (British English 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.
Sulphide copper ores generally occur with pyrite, pyrrhotite, arsenopyrite and molybdenite, and with gold and silver. A complete copper-iron separation may not always be essential for the maximum economic recovery and often is tied to the distribution of the gold and silver values. Flowsheet for treatment of Copper Sulfide ores rich in
Jun 29, 2017· Clean, electrically-driven process to separate commercially important metals from sulfide minerals in one step. by Denis Paiste, Massachusetts Institute of Technology
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.
Sulfide Mining Overview Friends of the Boundary Waters Wilderness ... sulfide mining industry is an important producer of commonly used metals that are necessary for ... Technical Document: Extraction and Beneficiation of Ore and Minerals, Volume 4: Copper. US …
Massive Sulfide Ores of the Northern Equatorial Mid Atlantic Ridge. Recommend Documents. mid-atlantic ridge - Geochronometria . Ridge (MAR) (Thomson et al., 1985). These discoveries have gathered great scientific and economic interest due to the high concentrations of many metals as ...
Help Save the Boundary Waters protect the Boundary Waters Canoe Area. Wilderness from a new and dangerous threat—industrial proposals for sulfide mining, a high-risk mining practice never before permitted in Minnesota.
Nickel Smelting and Refining Industry Description and Practices Primary nickel is produced from two very dif-ferent ores, lateritic and sulfidic. Lateritic ores are normally found in tropical climates where weath-ering, with time, extracts and deposits the ore in layers at varying depths below the surface. Lat-
The Cuprex Metal Extraction Process: Recovering Copper from Sulfide Ores R.F. Dalton, G. Diaz, R. Price and A.D. Zunkel The Cuprex™ metal extraction process produces cathode-grade copper using a hydrometallurgical process based on chloride leaching of sulfide ore concentrates.
WHEREAS, sulfide-ore copper mining is a type of hardrock mining; and WHEREAS, data from the U.S. Environmental Protection Agency (EPA) Toxic Release Inventory show hardrock mining, including sulfide-ore copper mining, to be the nation's largest toxic
These were primarily copper sulfide ores. An ore is a natural mineral that can be mined and treated for the extraction of any of its compo-nents, metallic or otherwise. The metallic com-ponent of copper sulfide minerals is copper. Sulfur is one of the nonmetallic elements. Ex-traction of copper from copper sulfide ores …
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 Mining produces ores with less than 1 percent copper. Concentration is accomplished at the
Acid Mine Drainage Prediction compares acid rock drainage factors of waste rock piles and tailings impoundments. In examining this table, it is important to note that diffusion of oxygen into water is slow and, therefore, oxidation of iron sulfide is inhibited until the water level drops, which can occur periodically or seasonally in some cases.
Document US 2009/0173188 by Elmar L. Muller, Petrus Basson, Michael J. Nicol, describes a heap leach method for recovering copper from a primary copper sulphide ore in where the mineral is leached in a Chloride/acid-sulfate solution in the presence of oxygen, with the potential of the ore surface below 600 mV to cause the dissolution of copper ...
The Pechenga–Allarechka Ni–Cu–PGE ore dis trict is situated in the northwestern part of the Pech enga–Varzuga mineragenic domain (Fig. 1a) and is the main source of Ni and Cu in the region. About ten deposits of sulfide Ni–Cu ore related to gabbro–wehr lite intrusions have been explored here.
Sulfide mineral: Sulfide mineral, any member of a group of compounds of sulfur with one or more metals. Most of the sulfides are simple structurally, exhibit high symmetry in their crystal forms, and have many of the properties of metals, including metallic luster and electrical conductivity.
The sulfide minerals are a class of minerals containing sulfide (S 2−) or persulfide (S 2 2−) as the major anion. Some sulfide minerals are economically important as metal ores. The sulfide class also includes the selenides, the tellurides, the arsenides, the antimonides, …
Summary. This resource is a citation record only, the Center for Digital Antiquity does not have a copy of this document. The information in this record has been migrated into tDAR from the EXARC Bibliography, originally compiled by Roeland Paardekooper, and updated.
Jun 25, 2018· "Creating the Boundary Waters Canoe Area Wilderness was a promise to protect these interconnected lands and waters in their natural state for generations to come. Sulfide-ore mining on the edge of this iconic wilderness would replace a legacy of conservation and recreation with pollution and environmental degradation.
This study documents the geochemistry of sulfide ores of the Tudun Cu–Ni sulfide deposit, located at the western end of the Huangshan–Jing'erquan ore belt in the northern part of eastern Tianshan. The ores have been classified as (1) disseminated sulfide ores, (2) net-textured sulfide ores, and (3) massive sulfide ores.
Silver-rich ores and copper sulfide ores: Silver-rich ores and copper sulfide ores are often free-milling, but when the silver grade is high (>10 g/t) and/or the gold is present as electrum, the processing may need to be modified. The greater reactivity of silver SGS MINERALS TECHNICAL BULLETIN 2004-03
Copper sulfide ores, where the pyrite content can vary from 10% to 90%. The predominant sulfide mineral in this ore is pyrite, but may also contain pyrrhotite and marcasite. Some copper sulfide ores also contain significant quantities of gold and silver.
Safety Management of UG Combustible Sulphide Dust Department of Industry and Resources Document No. ZMI578XC Regulations contained in the Mines Safety and Inspection Regulations 1995 which are relevant to underground mines subject to sulphide dust ignitions are: Specific emergency precautions required to be taken for underground mines 4.36.
two to eight times greater than the non-enriched primary sulfide mineralization (0.1 to 0.4% copper). Small very high-grade enriched zones, averaging 20% Cu, were mined at Morenci during the 1880s. Enriched sulfide ores are mainly composed of sooty to fine-grained chalcocite that coats and/or replaces pyrite and copper-bearing sulfides.
Angle of Material Recommended . Material Density Repose Group Max. Inclination . Alfalfa, Meal 17 45° 4 ... Aluminum ore (see bauxite) Aluminum oxide 70-120 29° 2 . ... Ferrous sulfide 120-135 20-29° 3 . Filter press mud, sugar 70 0° 1 . factory .
Chemistry, Theory and Practice: Flotation of Sulfide Ores by Srdjan M. Bulatovic
"The Bureau of Mines investigated a hydrometallurgical procedure to recover gold, silver, and byproduct lead from a complex lead-zinc sulfide ore. A ferric chloride (fecl3) preleach, at 40 deg c in 6 h, extracted about 50 pct of the zinc and formed insoluble silver and lead chlorides.
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.
of sulfide ores (nickel sulfide concentrates contain 6-20% nickel and up to 30% sulfur). Sulfur dioxide releases can be as high as 4 ... Draft document. United Nations Environment Programme. 1993. "Environmental Management of Nickel Production. A technical Guide." Technical Report No. 15 .