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A method for the determination of sulfate and sulfide sulfur that occur together in rocks or minerals is presented. All the sulfate sulfur is converted to barium sulfate in an inert atmosphere to prevent oxidation of any sulfide sulfur. Cadmium chloride is added to precipitate any sulfide ion that may be liberated.
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Primary nickel is produced from two very different ores: sulfide ores and laterite (oxide) ores. Sulfide ores, which are generally mined from underground and often found in conjunction with copper-bearing ores, contain copper–iron sulfides in association …
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This Bureau of Mines publication is a literature study of the problems of spontaneous oxidation and combustion of sulfides in underground mines. It summarizes the present-day hazards, process mechanisms, and prevention and control techniques of this growing problem in underground mines.
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An integrated underground mining and processing system for massive sulphide ores Bamber, Andrew Sherliker Abstract. A conceptual framework for the consideration of underground processing to improve the economics and environmental performance of underground hard rock mining has been developed from a previous phase of research …
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May 06, 2020· Underground photos of interspinifex ore from Lunnon (a and b) and from McLeay (c).The Lunnon interspinifex ore is composed of long single plates arranged parallel with melt plumes on their top, due to the infiltration of sulfide melt (Barnes et al. 2016).The McLeay interspinifex ore on the other hand is composed of patches with short parallel …
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Many approaches were pursued to solve the "sulfide problem" at Broken Hill before selective flotation was developed. The successful technology involves first crushing the ore, typically to a particle size of about 5 to 50 micrometers, to liberate separate grains of the various valuable minerals and worthless gangue components.Then the particles are …
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Sulfide-Ore Copper Mining and the Risks. ... and sulfates. • Spills and seepage from surface storage of waste rock, underground mine pits, tailings pipelines or other facilities would release AMD to the interconnected streams, lakes, wetlands and groundwater flowing to the Boundary Waters. • High acidity can alter gill membranes, prevent ...
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Jan 01, 2011· Series of test study for typical sulfide ores under temperature programmed oxidation (TPO) conditions were presented in this conference paper, with the aim of correlating the spontaneous combustion tendency and the measurements of total oxygen uptake and starting temperature of self-heating. Also relevant nitrogen adsorption …
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Sulfide Mining Fact Sheet What is sulfide mining? òSulfide mining ó refers to mining metals that are found in sulfide-bearing rock. Mining metals in sulfide ores can be done in two ways: in underground mines where the ore deposits are very deep, and in open-pit mines when the deposits are relatively shallow.i
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This important class includes most of the ore minerals. The similar but rarer sulfarsenides are grouped here as well. Sulfide minerals consist of one or more metals combined with sulfur; sulfarsenides contain arsenic replacing some of the sulfur. Sulfides are generally opaque and exhibit distinguishing colours and streaks. (Streak is the colour of a mineral's …
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Where are sulfide ores found? Major nickel sulfide deposits are found in Canada, Russia, South Africa, and Australia. Oxide deposits are typically found stratified with a top layer of iron overburden. Below the iron is a limonite (hydrated iron oxide) which also contains 1–1.5% nickel, 40–50% iron, and 0.2% cobalt and other impurities.
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If sulfide ore or sulfide tailings are exposed to water and air during mining, a chemical reaction creates sulfuric acid – basically battery acid. There has never been a sulfide mine that has not polluted nearby water resources. Pollution from sulfide mining is very expensive to fix, and a burden for taxpayers.
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Nov 17, 2022· The flotation of sulfide ores using benzimidazole-2-thione and 5-(butylthio)-1,3,4-thiodiazol-2-thiol was studied in . Both reagents are strong collectors. The first, having high selectivity, is most effective for sphalerite, and sulfur atom in the pendent group interacts with the metal atom, the second—for galena and sphalerite, it exhibits ...
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The nickel is deposited as a 99 wt % pure powder. [Pg.3] Hybinette A process for extracting nickel from sulfide ores. The nickel ore that occurs in Canada is a mixture of the sulfides of nickel, copper, and iron. Several methods have been used to separate these metals. In the Hybinette process, the ore is first smelted in a blast furnace ...
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Many sulfide ores contain Pt, Au, Ag, Cd, In, Se, and Te as admixtures. Most deposits of sulfide ores are endogenous, and among those, hydrothermal deposits predominate. The ore bodies are most often veins, but they may also be sheets, lenses, stocks, and pipes. The length and depth of such bodies range from hundreds of meters to several kilometers. …
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