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Some sulphide ores undergo oxidation by air to form sulphates. This explains the occurrence of sulphate ores. Ores are invariably found in nature in contact with rocky materials. These rocky or earthy impurities accompanying the ores are termed as gangue or matrix. Some important ores and the metals present in these ores are listed in Table 18.1
sulfide ores. It is impracticable to list the numerous Arizona mines and prospects in which gold occurs. Descriptions and references are given in Arizona Bureau of Mines Bulletins 137 and 142, further references in Arizona Bureau of Mines Bulletin 146 and 161, and
Sulfide-ore mines are proposed to be built in the BWCA watershed, immediatel y adjacent to the BWCA and upstream from it. These mines would threaten to pollute pristine water and damage the important forest habitat used by many types of wildlife. Sulfide-ore min ing has a consistent
This document specifies an analytical method for the determination of total chlorine content using alkaline fusion and potentiometric titration. This method is applicable to copper and nickel sulfide ores and concentrates having chlorine content in the following ranges: a) Method 1: 80 µg/g to 4 300 µg/g. b) Method 2: 70 µg/g to 4 300 µg/g
Telfer Gold Mine treats both gold/copper oxide and sulfide ores in a remote location in the Great Sandy Desert, Western Australia. Currently, the oxide gold ore is treated in a conventional CIL circuit by blending the low and high grade copper ores to minimize cyanide consumption and allow smooth operation. The sulfide ore is treated
Feb 05, 2020· Proponents of sulfide-ore copper mining argue that the choice between this new type of mining and amenity-based development is a false choice for the Arrowhead region (Praxis Strategy Group, 2017). Those making this claim point to the continued existence of the taconite mining industry during the
The latter process may yield zoned ore bodies consisting of Os, Ir, Ru, Rh, Fe, (Ni)-rich monosulphide solid solution (mss) cumulate ore and fractionated sulphide ore rich in Cu, Pt, and Pd. It is possible to model these processes and thereby to estimate the potential of a magmatic body to host economic Cu-Ni-PGE sulphide deposits.
This study is the first to document the occurrence of polymetallic sulfide melt inclusions (SMI) at Thompson, which indicates that partial melting of sulfide ores occurred during peak metamorphic conditions and modified the ores at Thompson. A staged mechanism for the formation of Thompson sulfide deposits is proposed, in which three principle ...
Jan 01, 2019· JX Nippon Mining and Metals Corporation has developed the JX Iodine Process, which is an innovative and patented copper-leaching process for low-grade primary sulfide ores. This process consists of the irrigation of ferric iron and a low concentration of iodide solutions.
Massive sulfide ores were collected from active and inactive vents and smokers and from mounds of the hydrothermal Jade field in the central Okinawa trough (Japan), which is a tectonically active intracontinental back-arc basin located in the northwestern Pacific.
The sulfide minerals are a class of minerals containing sulfide (S 2−) or disulfide (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, the bismuthinides, the sulfarsenides and the sulfosalts. Sulfide minerals are inorganic compounds
Sulfide mining (also known as metallic mining) refers to mining operations which remove metals, such as copper, nickel, platinum and others, from sulfur bearing ores. ... Technical Document: Extraction and Beneficiation of Ore and Minerals, Volume 4: Copper. US Environmental Protection Agency, Office of Solid Waste. Washington D.C.
Stibnite has a low melting point, and it can be extracted by melting if the ore contains 45-60% antimony and is free of lead and arsenic. This technique is called liquation. Sulfide ores with antimony contents between 5 and 25% are roasted to give volatile Sb. 2. O. 3. which is reduced directly to the metal. Low-grade and complex ores or ores in
Magmatic Ni-Cu±PGE sulfide deposits can occur with a number of other magmatic ore deposits. These include low-sulfide, contact-type, and reef-type PGE deposits, chromite deposits, and Fe-Ti-V deposits. In addition, secondary processes can produce associated asbestos,
A process for leaching a value metal from a base metal sulfide ore, comprising the step of leaching the ore with a lixiviant comprising a chloride, an oxidant and hydrochloric acid is disclosed. The leaching is controlled, by use of low concentrations of hydrochloric acid and a redox potential, to effect formation of hydrogen sulfide from the base metal sulfide ore.
procedure for explore mining processing ores Technical Resource Document: Extraction and Beneficiation of Ores . EPA 530-R-94-035 NTIS PB94-201811 TECHNICAL RESOURCE DOCUMENT EXTRACTION AND BENEFICIATION OF ORES AND MINERALS VOLUME 6 GOLD PLACERS October 1994 U.S. Environmental Protection Agency Office of Solid Waste …
The author reports on the results of sixty experiments on processes related to the enrichment of the sulfide ores of copper. Also submitted to Leland Stanford Junior University toward the Degree of Doctor of Philosophy.
Flotation and cyanidation of gold bearing sulphide ore from gold mines of Kalgoorlie ( Aust) Limited.Dec. 1964. 26 p . - no . 721. Author: . Publisher: ISBN: IND ...
Our 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. Our solutions encompass the flotation of ores containing lead, zinc, copper, nickel, cobalt.
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 pro-
20148.R01 Revision 7/9/99 Secondary sulfide ore crusher 20148.R02 Revision 11/19/99 Performance test for secondary sulfide ore crusher 20456 Operating 9/27/93 Lime & Lab A20510.000 Major Source Withdrawn Facility V20600.000 Title V 6/5/03 Facility V20600.R01 Minor Mod. 12/13/04 Heavy duty equipment painting V20600.R02 Minor Mod.
A novel flotation promoter used in the concentration of copper bearing ores for the efficient selective flotation of copper values, including chalcopyrite, with suppression of iron pyrites; the promoter comprising a sodium sulfate of an aliphatic hydrocarbon having a carbon chain in excess of 12 carbons and chemically combined with at least one mole of the C2-C3 alkylene …
gold is fine-grained and locked in sulfide minerals but also because the gold can be robbed from the cyanide solution by the carbonaceous matter.3 At Barrick's Goldstrike Mine, where gold occurs in pyrite in refractory sulfide ore and double-refractory sulfide/carbonaceous ore, gold ores are pretreated by autoclave and roaster prior to cyanide
Handbook of Flotation Reagents Chemistry, Theory and Practice: Flotation of Sulfide Ores by Srdjan M. Bulatovic • ISBN: 0444530290 • Publisher: Elsevier Science & Technology Books • Pub. Date: April 2007
The aim of this paper is to assess the effect of microwave treatment on copper sulfide ore for ball milling and bed breakage. Liberation analysis of ground products in eight size fractions showed that microwave pretreatment liberated more chalcopyrite particles from the bed breakage product than the ball mill product.
In some cases, after crushing, sulfide ores may be treated by roasting, autoclaving, bio-oxidation, or chlorination prior to heap leaching. Two common types of pads used in gold heap leaching include permanent heap construction on a pad from which the leached ore is not removed and on-off pads, which allow the spent ore to be removed following the
Nickel-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.
Cite this Record. Smelting of sulfide ores of copper in preconquest Peru. E R Caley, D T Easby. American Antiquity. 25: 59-65. 1959 ( tDAR id: 416349)
Nevada. Roasting of sulfide ores involves heating the ores in air to convert them to oxide ores and break up their physical structure, allowing leaching solutions to penetrate and dissolve the gold. In effect, roasting oxidizes the sulfur in the ore, generating sulfur dioxide that can be captured and converted to sulfuric acid.
Sulphide Source • • Variable in concentrati Conditions may vary from sulphide rich to basic over short distances. on and location. • Conditions uniform, often with very high sulphide content. Particle Size • Average rock size typic than 20 cm (but highly variable). ally greater • Tailings may be less than 0.2mm. pH Variation •
Development Document for Effluent Limitations Guidelines. Ore may also be concentrated by froth flotation, a process designed for extraction of copper from sulfide ores. Ore is crushed and ground to a suitable mesh size and is sent through flotation cells. Copper sulfide concentrate is lifted in the froth from the
Lead-zinc sulphide ore contains lead sulphide (galena), and zinc sulphide (sphalerite). In the first flotation stage, galena is rendered hydrophobic with an organic collector such as xanthate, while sphalerite is kept from floating by depressants, and in the second flotation stage, activator was used to activated zinc flotation.
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, sulfuric acid can be created — threatening to poison the nearby water ...