Cyanide leaching chemistry of platinumgroup metals.

Previous research by the Bureau of Mines has shown that autoclave cyanide leaching of used automobiles exhaust catalysts for recovery of platinum group metals (PGM) is technically feasible. The purpose of this work was to investigate the chemistry of the dissolution of …

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A conceptual flowsheet for heap leaching of platinum …

A conceptual flowsheet for heap leaching of platinum group metals (PGMs) from a lowgrade ore concentrate James M. Mwase 1, Jochen Petersen , Eksteen2 1. Department of Chemical Engineering, University of Cape Town, South Lane Road, Upper Campus, Rondebosch, Cape Town, 7700, Republic of South Africa 2.

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Recovery of Platinum Group Metals from Spent Automotive ...

RECOVERY OF PLATINUM GROUP METALS FROM SPENT AUTOMOTIVE CATALYST Suzana Dragulovic, Mile Dimitrijevic, Ana Kostov and Smiljana Jakovljevic Mining and Metallurgy Institute Bor Zeleni bulevar 35, 19210 Bor Serbia ABSTRACT A special treatment of platinum group metals (PGMs) leaching from spent automotive catalyst is shown in this paper.

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Cyanide Leaching of Platinum Group Metals

Therefore, an additional group of autoclave leaching tests was performed concerning the effect of time at temperature for leaching of the Rh black. Leaching tests were done with no holding time at temperature and 30 min at temperature, for comparison with the standard 60 min leaching …

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Recovering lowgrade platinum metals

Remote, lowgrade deposits of platinum group metals (PGMs) can be economically recovered using novel direct leaching approaches, doing away with the need for traditional, expensive smelting ...

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platinum leaching in gold united kingdom

platinum leaching in gold united kingdom platinum leaching in gold united kingdom Chemicals for the Shor Simplicity refining system Finishing. There is quite a few of us in the UK and it would help if we could source theleach for gold and other precious metals such as the platinum group metals.

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Palladium Leaching in Ammonia

Recently, a number of techniques of recovering Palladium have been developed. For example, leaching of platinum group metals from spent automobile catalytic converters using halogen salt with oxygen was developed. Ammonia is an inexpensive lixiviant used in leaching precious metals such as silver and gold.

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Welcome to CDC stacks | Cyanide leaching chemistry of ...

"The Bureau of Mines Reno Research Center operated a batch pilot plant to demonstrate hightemperature cyanide leaching or recovering platinum group metals (PGM) from automobile catalysts.

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DETERMINATION OF LEACHING PARAMETERS FOR THE …

DETERMINATION OF LEACHING PARAMETERS FOR THE RECOVERY OF PLATINUM GROUP METALS FROM SECONDARY MATERIALS . Kristian LILLKUNG, Jari AROMAA, Olof FORSEN ... Platinum group metals (PGMs) are exploited for many purposes. They are nearly ... Determination of leaching parameters for the recovery of platinum group metals…

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INVESTIGATION OFTHELEACHING OF THEPLATINUM …

Acid soluble Platinum group metals Atomic Emission Spectrometry Aqueous Base Metals refinery Chlorine soluble Platinum group metals Chlorine gas weight % ofthe PGM insample into leach Corrosion potential Concentration Energy dispersive analysis ofXrays Energy dispersive spectroscopy Energy exponential function Figure gramme Group Hydrochloric acid

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Leaching and recovery of platinum group metals from UG2 ...

Leaching and recovery of platinum group metals from UG2 concentrates yields were not good (less than 40 per cent). Platinum leaching was particularly poor with cyanide (ambient temperature). A HCl/chlorine leach on untreated material had the same effect as a cyanide leach with a nitric acid preleach,

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Extractive Metallurgy of Nickel, Cobalt and Platinum Group ...

Purchase Extractive Metallurgy of Nickel, Cobalt and Platinum Group Metals 1st Edition. Print Book EBook. ISBN 9780080968094, 9780080968100. Skip to content. Menu. Cart 0. View Cart; ... Leaching of Nickel Sulfide Mattes and Precipitates Chlorine Leaching. Oxygen–Ammonia Leaching

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OVERVIEW OF PGM PROCESSING

PLATINUM Platinum Group Metals (PGMs) are recovered through underground and open pit mining from polymetallic ... • Platinum (Pt), Palladium (Pd), Rhodium (Rh) and Ruthenium (Ru) are the most prevalent of the six PGMs, with Iridium (Ir), and Osmium (Os) found in much smaller quantities ... matte leach capability • Ni/Cu/Co PGM separation ...

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Recovery of Platinumgroup Metals from Stillwater Complex ...

Recovery of Platinumgroup Metals from Stillwater Complex, Montana, Flotation Concentrates by Matte Smelting and Leaching.

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A conceptual flowsheet for heap leaching of platinum group ...

Platinum showed a similar trend, leaching at a comparably better rate but still slow. The platinum leach curve in Fig. 4 is essentially linear and it suggests that there is a chance that a desired target of extraction could be achieved over a longer leaching period.

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Recovery of platinum group metals from oxide oresTML …

892 Recovery of platinum group metals from oxide ores Bromine Leaching of Platinum It is known that platinum and other PGM's will form divalent [PtCI 4] 2or tetrava­ lent metal complexes [PtCl 6] 2 with halide ions, having a higher affinity for the heavier halide ions according to the following order: r > Br > CI > ,

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Recovery of Platinum Group Metals from the Leach Solution ...

Recovery of Platinum Group Metals from the Leach Solution of Spent Automotive Catalysts by Cementation. ... the recovery of platinum group metals from the leach solution of …

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Platinum group | chemical element group |

Virtually all platinumgroup metals are recovered from copper or nickel sulfide minerals, which are concentrated by flotation separation. Smelting of the concentrate produces a matte that is leached of copper and nickel sulfides in an autoclave. The solid leach residue contains 15 to 20 percent platinumgroup …

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Leaching of platinum group metals (PGMs) from spent ...

The full text of this article hosted at is unavailable due to technical difficulties.

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RECYCLING OF PLATINUM GROUP METALS FROM …

Platinum 2012 695 R. Rumpold, J. Antrekowitsch RECYCLING OF PLATINUM GROUP METALS FROM AUTOMOTIVE CATALYSTS BY AN ACIDIC LEACHING PROCESS R. Rumpold University of Leoben J. Antrekowitsch University of Leoben Abstract The platinum group metals (PGMs) palladium, platinum, and rhodium represent the key

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The use of heap bioleaching as a pretreatment for ...

The use of heap bioleaching as a pretreatment for platinum group metal leaching James M. Mwase1 and Jochen Petersen2,* 1. GeMMe, Mineral Processing and Recycling, University of Liege, Liege, Belgium 2. Department of Chemical Engineering, University of Cape Town, Rondebosch, South Africa

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Cyanide leaching chemistry of platinumgroup metals ...

The Bureau of Mines Reno Research Center operated a batch pilot plant to demonstrate hightemperature cyanide leaching or recovering platinum group metals (PGM) from automobile catalysts. Approximately 1,600 kg of used pellet, monolith, and metal support catalyst containing 1,700 g (54 tr oz) of PGM were processed.

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RECOVERY OF PLATINUM GROUP METALS FROM SPENT …

RECOVERY OF PLATINUM GROUP METALS FROM SPENT ALUMINA SUPPORTED CATALYSTS Richard Dawson and Geoff Kelsall ... Renato G. Leaching Kinetics of Platinum and palladium from spent automotive catalysts. Fourth Symp on Sep Sci and Tec for …

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platinum leaching in gold belgium

Chemical analysis was conducted using aqua regia leaching,loss on ignition andGenerally,metals in e waste can be grouped into PMs,platinum group metals For gold,a liquid liquid extraction method was adopted with toluene and abuilding the world's largest waste recycling facility at Hoboken,Belgium.

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Recovery of platinumgroup metals from ores The United ...

Jun 29, 1982· Recovery of platinumgroup metals from ores . United States Patent 4337226 . Abstract: Metal values are recovered from ore concentrates by means of dry grinding, followed by a twostage leaching process in which the ground concentrate is first leached with sulfuric acid at a temperature of about 90° to 100° C. to selectively leach ...

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Hydrometallurgical recovery/recycling of platinum by the ...

Hydrometallurgical recovery/recycling of platinum by the leaching of spent catalysts: A review. ... WaltersHigh temperature cyanide leaching of platinum group metals from automobile catalystsprocess development unit. US Bureau of Mines, RI 9428 (1992) (11 pp.) Google Scholar.

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Leaching platinumgroup metals in a sulfuric acid/chloride ...

A leaching process was established based on the ability of platinumgroup metals to form stable chlorocomplexes in acidic chloride solutions. Industrial catalyst losses were examined for the recovery of platinum, palladium, and rhodium by leaching with a mixture of sulfuric acid and sodium chloride to avoid using aqua regia or autoclave ...

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Recovery of platinum group metal value via potassium ...

Recovery of platinum group metal value via potassium iodide leaching Anant Patel, Richard Dawson⁎ Engineering Department, Faculty of Science and Technology, Lancaster University, Lancaster, LA1 4YW, United Kingdom

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Sherritt International Operations Commercial and ...

Leaching of nickelcopper matte and recovery of platinum group metals Sherritt’s matte leach process uses sulphuric acid leaching in a combination of atmospheric and/or pressure leaching steps to quantitatively dissolve nickel and copper in nickelcopper matte and produce a highgrade platinum group metal (PGM) concentrate for refining.

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Nontoxic leaching formula developed for escrap EScrap ...

A leaching method can effectively extract precious metals from escrap without using toxic chemicals, the product’s creator said. British Columbia, Canadabased Mineworx said its HM X leach formula removes gold, palladium, platinum, silver and other metals from circuit boards and is safer than cyanide or other leaching formulas.

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THE PRIMARY PRODUCTION OF PLATINUM GROUP METALS …

The six platinum group metals (PGMs) occur together in nature alongside nickel and copper. Mineable deposits of ... Leaching Tailings Smelting Leaching Concentrate Ore Slurry Furnace Matte Converter Matte Leach Solution Cu/Ni containing Ni/Cu/Co Sodium Sulphate Ammonium Sulphate Effluents

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STUDIES ON PLATINUM RECOVERY FROM SOLUTIONS …

Studies on platinum recovery from solutions after leaching of spent catalysts by solvent extraction 241 supplier of platinum, accounting for roughly 10%. Platinum production capacity is estimated to grow to approximately gigagram (Gg) in 2010 from about Gg in 2002. Before 1999, supply and demand were largely balanced and prices were

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pgm leaching process theory

Nov 10, 2017· the mobility of the elements in the soils of the RRuff. eluvial deposits, in which the PGM are significantly different in grain size and morphology from those derived from an igneous and "leaching processes, particularly those involving leaching …

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Leaching of platinum group metals (PGMs) from spent ...

Leaching of platinum group metals (PGMs) from spent automotive catalyst using electrogenerated chlorine in HCl solution Article in Journal of Chemical Technology Biotechnology 88(11) · March ...

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About Platinum Gold and silver mines

The solid leach residue contains 15 to 20 percent platinumgroup metals. Sometimes gravity separation is employed prior to flotation; this results in a concentrate containing up to 50 percent platinum metals, making smelting unnecessary.

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pgm leaching process theory

Jul 11, 2018· the mobility of the elements in the soils of the RRuff. eluvial deposits, in which the PGM are significantly different in grain size and morphology from those derived from an igneous and "leaching processes, particularly those involving leaching …

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How to Refine Precious Metals Hydrometallurgy: Part 1 ...

Apr 17, 2014· This video shows the refining process steps for leaching precious metals used by professional refining companies. Silver, Gold, Platinum,, Palladium and the other platinum group metals. Part 2 ...

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