platinum group leaching

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Recovering low-grade platinum metals - Phys.org

Aug 17, 2015· Remote, low-grade deposits of platinum group metals (PGMs) can be economically recovered using novel direct leaching approaches, doing …

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

"Previous research by the U.S. 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 …

Separation of platinum group metals - Anglo American ...

Apr 02, 2002· Separation of platinum group metals ... leaching is carried out using hydrochloric acid, suitably 10N HCl, and suitably using a solid to liquid ratio of about 1:3.5 (kg/litre), at about 85° C. for about 1 hour. After completion, the solids were allowed to settle for half an hour before the supernatant leach liquor was analysed for iron.

Cyanide Leaching of Platinum Group Metals

Table of ContentsAutomobile Exhaust CatalystsCurrent Processing MethodsCyanide Leaching ProcessExperimentalResults and DiscussionHydrolysis of CyanideCharacterization of PGM SpeciesReduced Rh SpeciesRamifications of PGM Species GeometryOptimization of Cyanide Leaching ProcessLeaching Rate StudiesPGM Foil SamplesRotating Disk ExperimentsPGM Black SamplesApplication to Catalyst Leaching …

refining of platinum group metals / priciple flow sheet

refining of platinum group metals ore concentrate. pgm ore concentrate The figure below shows a typical assay of a South African platinum group metals ore concentrate obtained as the filter cake after sulfuric acid leach (according to the Sherrit process) of a Merensky reef converter matte.

Direct leach approaches to Platinum Group Metal (PGM) ores ...

Platinum-group elements transfer into solution by leaching (both under technological and natural conditions) can then be taken up on the surface of sulfide minerals. ...

OVERVIEW OF PGM PROCESSING

PLATINUM Disclaimer: This presentation has been prepared by Anglo American Platinum Limited ("Anglo American Platinum") and comprises the written materials/slides for a presentation concerning Anglo American Platinum. By attending this presentation and/or reviewing the slides you agree to be bound by the following conditions.

Platinum Group Metals (PGM) | Water Solutions

Separation of Platinum Group Metals (PGM) from Liquid Media. Acidic Halogen Leach. Many mining projects are underway in which ores are leached under oxidizing and acidic conditions. Under these conditions, DOWEX™ Anion Exchange Resins have proven to be tough, steady performers.

High-temperature cyanide leaching of platinum-group metals ...

The U.S. Bureau of Mines Reno Research Center operated a batch pilot plant to demonstrate high-temperature 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 ...

Leaching and recovery of platinum group metals from UG-2 ...

Leaching and recovery of platinum group metals from UG-2 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 pre-leach,

A conceptual flowsheet for heap leaching of platinum …

A conceptual flowsheet for heap leaching of platinum group metals (PGMs) from a low-grade ore concentrate James M. Mwase 1, Jochen Petersen, J.J. Eksteen2 1. Department of Chemical Engineering, University of Cape Town, South Lane Road, Upper Campus,

Platinum group | chemical element group | Britannica.com

Virtually all platinum-group 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 platinum-group …

"Platinum & palladium recovery from Catalytic converters"

"Platinum & palladium recovery from Catalytic converters" A practical manual for first ... In this manual are disclosed the methods used to recover platinum group metals (PGM`s) from scrap automotive catalytic converters (C/C`S). ... which would interfere with the leaching process that follows the grinding and roasting of your PGM bearing ...

(PDF) Recovery of platinum group metal value via potassium ...

Recovery of platinum group metal value via potassium iodide leaching. ... The work presented here investigated the leach rate of platinum black deposited on an electrochemical quartz crystal ...

Palladium Leaching in Ammonia - 911metallurgist.com

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. Since palladium has some similar chemical properties to silver, it is believed that ...

Leaching platinum-group metals in a sulfuric acid/chloride ...

A leaching process was established based on the ability of platinum-group metals to form stable chloro-complexes 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 ...

About Platinum - Gold and silver mines

Virtually all platinum-group 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 platinum-group metals. Sometimes gravity ...

The Adsorption and Elution of Platinum Group Metals (Pt ...

This paper investigates the recovery of platinum group metals (PGMs) from a dilute cyanide leach solution containing base metals, in a manner similar to that used for gold extraction in a typical CIP process, and focuses on both the adsorption and elution stages.

Recovery of platinum-group metals from ores - The United ...

Jun 29, 1982· Recovery of platinum-group metals from ores . United States Patent 4337226 . Abstract: Metal values are recovered from ore concentrates by means of dry grinding, followed by a two-stage 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 nickel and ...

Hydrometallurgical recovery/recycling of platinum by the ...

The natural resources of platinum and platinum group metals (PGMs; platinum, palladium, rhodium, ruthenium, iridium and osmium) are limited and mainly found in Russia, North America, Canada and South Africa. South Africa is the world's largest producer of platinum, which is mined in an area called the Bushveld Igneous Complex.

US5215575A - Recovery of gold, silver and platinum group ...

In the recovery of noble metals, including gold, silver and members of the platinum group, the ores or tailings are subjected to the action of various leaching agents, namely, sodium cyanide, thiourea, chlorine and aqua regia and optionally a leaching aid, such as chloride ions. The resulting slurry is then diluted to an optimum pulp density of 0.1 to 10.0% and allowed to stand in a holding ...

High-temperature cyanide leaching of platinum-group metals ...

High temperature cyanide leaching of platinum-group metals from automobile catalysts-process development unit Responsibility: by R.J. Kuczynski, G.B. Atkinson, and L.A. Walters.

Blacksand2gold

Remember, if you don't specifically look for it, you will never know that you had it to start with. In the iodine leaching process, the platinum group metals will remain in the leaching solution, along with the base metals, making the recovery more practical, although it …

Mineral processing: leaching process of chromium and ...

Abstract. The current strategy reports the recovery of precious group metals (PGMs) from Na 2 CO 3 roast of Saudi Arabian ophiolitic chromite ore at 1160 °C under atmospheric O 2.The influence of roasting temperature (960–1200 °C) and leaching agents (H 2 O, HCl, H 2 SO 4) and their concentrations on the recovery of PGMs was studied.Chromite roast concentrates a reasonable percentage of ...

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

Purchase Extractive Metallurgy of Nickel, Cobalt and Platinum Group Metals - 1st Edition. Print Book & E-Book. ISBN 9780080968094, 9780080968100

Sherritt International - Operations - Commercial and ...

Leaching of nickel-copper 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 nickel-copper matte and produce a high-grade platinum group metal (PGM) concentrate for refining.

THE PRIMARY PRODUCTION OF PLATINUM GROUP METALS …

The six platinum group metals (PGMs) occur together in nature alongside nickel and copper. Mineable deposits of PGMs are very rare, with annual production amounting to around 400 tonnes, several orders of magnitude lower than many common metals. Due to their economic values and higher quantities, platinum and palladium are the most

Cyanide leaching chemistry of platinum-group metals ...

Previous research by the U.S. 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 PGM in cyanide solutions ...

Recovery of Platinum from Chloride Leaching Solution of ...

Recovery of Platinum from Chloride Leaching Solution of Spent Catalysts by Solvent Extraction Pan Pan Sun and Man Seung Lee+ Department of Advanced Materials Science & Engineering, Mokpo National University, Chonnam 534-729, Korea Platinum was recovered from the leaching liquor of spent petroleum catalyst by solvent extraction.

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 ...