platinum group concentration
A New Way to Find Platinum Group Metals
The U.S. Geological Survey's 2014 Platinum Group Elements Fact Sheet describes some of reasons why productive deposits are so elusive: The Earth's upper crust contains only about 0.0005 parts per million (ppm) platinum. The average grade of platinum-group elements (PGEs) in ores mined for their PGE concentrations range …
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Platinum-group elements
Today, the average grade of PGEs in ores that are mined primarily for their PGE concentrations varies from 5 to 15 ppm, although the concentration of PGEs in hand …
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(PDF) A Generic Wet Impregnation Method for Preparing Substrate
Mass production of shape-controlled platinum group metal (PGM) and alloy nanoparticles is of high importance for their many fascinating properties in catalysis, electronics and photonics.
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Breaking of Henry's law for sulfide liquid–basaltic melt
Platinum group elements are invaluable tracers for planetary accretion and differentiation and the formation of PGE sulfide deposits. ... as the Pt and Pd concentration in the sulfide liquid ...
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The extractive metallurgy of South Africa's platinum ores
Spent automotive catalyst is a rich source of platinum group metals [PGM: platinum (Pt), palladium (Pd), and rhodium (Rh)] which contains higher concentrations of PGM than found in natural ores.
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Recent advances in the preconcentration and …
Renata Komendova. Add to Mendeley. https://doi/10.1016/j.trac.2019.115708 Get rights and content. Highlights. •. Global …
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Platinum Metals Magmatic Sulfide Ores | Science
Platinum-group elements (PGE) are mined predominantly from deposits that have formed by the segregation of molten iron-nickel-copper sulfides from silicate magmas. The absolute concentrations of PGE in sulfides from different deposits vary over a range of five orders of magnitude, whereas those of other chalcophile elements vary by factors of ...
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Platinum-Group Element
Platinum-group element concentrates are made into a matte that is relatively low in iron and sulfur, and enriched in platinum-group elements by smelting …
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Geology of the PGE Deposits in the Bushveld Complex, South Africa
The Bushveld Complex (BC), located in northern South Africa, is a Paleoproterozoic Large Igneous Province ~2 Ga in age. It is the world's largest layered mafic intrusion and boasts the highest concentration of Platinum Group Elements (PGE). The Bushveld Complex contains 75%, 54%, and 82% of global Platinum, Palladium, and …
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Platinum-Group Element Deposits in Layered Intrusions
Platinum-group elements concentrations in the Earth's primitive mantle vary from ~ 1 to 7 ppb (McDonough and Sun 1995) . The PGE are typically hosted by micron-scale base-metal sulfides and alloys that represent an extremely minor volume proportion (typically less than 0.1 %) of the mantle (Lorand et al. 2008b ) .
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Platinum group | Chemical Properties, Uses & Occurrence
The separation chemistry of the platinum-group metals is among the most complex and challenging of metal separations. A brief description of procedures for isolating the platinum-group metals is set forth below, followed by …
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Platinum facts
The high values of PGMs and their greater concentration in recyclable material compared to mined ore has contributed to the high level of recycling of PGMs. World supply of platinum group metals, by source, 2021 ... World supply of platinum group metals, by source, 2021 Johnson Matthey PGM Market Report 2022, May 2022; …
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Chalcophile and platinum-group element (PGE) concentrations in …
Magmatic sulfide deposits consist of pyrrhotite, pentlandite, chalcopyrite (± pyrite), and platinum-group minerals (PGM). Understanding the distribution of the chalcophile and platinum-group element (PGE) concentrations among the base metal sulfide phases and PGM is important both for the petrogenetic models of the ores and for …
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PHYSICAL AND CHEMICAL PROPERTIES OF PLATINUM …
concentration. The ammonium and potassium salts of some of the hexachloro complexes are of relatively low water solubility and those of Pt(IV), Pd(IV), and Ir(IV) are sometimes …
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Dissolution behavior of precious metals and selective palladium
The effects of the trichloride concentration in the ionic liquid and temperature were studied, reaching higher leaching rates at higher trichloride conversions and increased temperatures. ... Platinum-group metals (PGMs) are crucial for the automotive industry because they are key elements in catalytic converters, which are part of the exhaust ...
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Platinum
Production concentration. The percentage of an element produced in the top producing country. The higher the value, the larger risk there is to supply. ... Johnson Matthey perfected the techniques of separating and refining the platinum group metals and in 1879 Matthey produced a standard metre measure made of a platinum and iridium alloy.
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Recycling pathways for platinum group metals from spent …
In ACC, platinum concentration ranges from 300 to1000 ug g −1, while palladium and rhodium concentrations range from 200 to 800 ug g −1 and 50 to 100 ug g −1 respectively ... The recovery of platinum group-metals (PGMs) has attracted increasing attention owing to their scarcity, economic importance, and criticality. ...
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Direct leach approaches to Platinum Group Metal (PGM) ores and
Platinum group metals are conventionally recovered from high-grade concentrates (typically assay of 200 to over 2000 g/t PGM with 0.4–2.8% Cr 2 O 3) by the traditional matte–smelting–refining technique depicted in Fig. 2 (Cole and Joe Ferron, 2002).Ore is first ground by conventional multistage crushing and ball milling, or by semi …
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Platinum Group Metal
The platinum group metals (PGMs) comprise 6 elements, which are platinum, palladium, rhodium, ruthenium, iridium, and osmium. These metals have high melting points, high …
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Platinum-Group Elements and Gold in Ophiolitic Complexes
Gold and Platinum-Group Elements in cobalt-arsenide ores: hydrothermal concentration from a serpentinite source-rock (Bou Azzer, Morocco)., Mineral. Petrol., 42: 197–209. CrossRef Google Scholar
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Platinum Group Metals: A Review of Resources, Production …
The platinum group of metals (PGM) include six d-block metals from groups 8, 9, and 10 as well as periods 5 and 6. The metals are ruthenium (Ru), rhodium (Rh), palladium ... The level of extraction depends on the PGM concentration in the ore body and the price of the individual PGMs. In some ore bodies, the primary production may
ادامه مطلبRhenium‐osmium isotope systematics and platinum group …
Platinum group element concentrations in loess from China (top), Argentina (middle), and Europe (bottom), normalized to primitive mantle [McDonough and Sun, 1995]. The estimates of Wedepohl and Schmidt et al. [1997a, 1997b] are shown for comparison as thick green (W) and red lines (S), respectively. Also shown as a gray line …
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Potential Processing Routes for Recovery of Platinum Group
The beneficiation of platinum group metals (PGMs) from pristine (unweathered) sulfide ores has conventionally been conducted through froth flotation, which typically achieves platinum recoveries of over 85%. The achieved successes of PGM concentration by flotation from the pristine sulfide ores are largely due to the occurrence …
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Platinum-Group Element
Platinum-group elements occur mainly in or near sulphide minerals in an ore deposit. They are typically dissolved in pentlandite [(Ni,Fe) 9 S 8], or present as distinct mineral grains, for example, as braggite [(Pt,Pd)S].The minerals containing platinum-group elements are often attached to or occluded by grains of pentlandite, pyrrhotite [Fe 8 S 9] and chalcopyrite …
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Why Mining Platinum Group Metals Can Be Fraught with Difficulty
Earth's upper crust contains only about 0.0005 part per million (ppm) platinum. Today, the average grade of PGEs in ores that are mined primarily for their PGE concentrations varies from 5 to 15 ppm, although the concentration of PGEs in hand-picked ore specimens may range from tens to hundreds of parts per million.
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Platinum Group Metals: Green Recovery from Spent Auto …
This manuscript reviews the current trends in the recovery of Platinum Group Metals (PGMs) from end-of-life autocatalysts and the aims of the recently funded Marie Sklodowska-Curie Project "Chemistry of Platinum Group Metals-CHemPGM" towards the greening of PGMs recovery processes and the reusing of recovered PGMs for …
ادامه مطلبWhat Are Platinum Group Metals (PGMs)?
Terence Bell. Updated on December 10, 2018. The platinum group metals (PGMs) are six transitional metal elements that are chemically, physically, and …
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Things Are Looking Up for Asteroid Mining | WIRED
The concentration of platinum-group metals in iron meteorites ranges between 6 and 230 parts per million, higher than terrestrial ores, according to a recent study Gialich coauthored with a ...
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Merensky-type platinum deposits and a reappraisal of magma
The Merensky-type platinum deposits occur as thin, continuous layers of sulphide- and chromite-bearing silicate rocks anomalously enriched in the platinum group elements (PGE; Os, Ir, Ru, Rh, Pt ...
ادامه مطلبSelective and Preferential Separation of Rhodium (III) from
Rhodium (Rh) is a member of the platinum group metals (PGMs), and this element is industrially important because it displays the highest electrical and thermal conductivities among PGMs; it is ...
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