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 …
Bioprocessing of oxidized platinum group element (PGE) ores as pre-treatment for efficient chemical extraction of PGE. Author links open overlay panel Sabrina Hedrich a 1, Dennis Kraemer b, ... The initial ratio of 1:10 (1 g ore on 10 mL leaching solution) was changed to 2:10, 3:10, 4:10 and 5:10 and each experiment was …
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 conditions. …
A leaching process for platinum contained in a magnetite ore was studied, as an alternative process to cyanidation and aqua regia digestion. The proposed process employs concentrated chloride solutions and ozone gas injection during the entire leaching process. The effect of pH, chloride concentration and temperature was analyzed.
Abstract Platinum group metals (PGMs) are considered critical raw materials, thus their recycling and re-use is of outmost importance. Among the PGMs, platinum (Pt), palladium (Pd) and rhodium (Rh) are the basic metals used in catalytic converters. Concerning the stringent EU standards for emission control imposed to car …
Keywords: Platinum group metals; Flotation concentrates; Spent auto-catalysts; Pressure cyanidation; Leaching mechanism 1. Introduction The content of platinum group metals (PGMs) in proterozoic platinum ores is about 1–10 g/t, while in Cu–Ni sulfide ores containing PGMs, the content is only 0.1–1 g/t. By flotation, the content of PGMs is
A standard platinum flowsheet achieves this by smelting of the ore concentrate before leaching. In In the present case a hydrometallurgical iron removal step may be required depending on the amount
Mineable platinum group metal (PGM) deposits are rare and found in relatively few areas of the world. At the same time, the use of PGM is predicted to expand in green technology and energy applications, and PGMs are consequently currently listed as European Union critical metals. Increased mineralogical complexity, lower grade ores, …
DOI: 10.1016/J.MINENG.2015.04.015 Corpus ID: 111146351; Direct leach approaches to Platinum Group Metal (PGM) ores and concentrates: A review …
DOI: 10.1016/J.HYDROMET.2011.11.012 Corpus ID: 55929507; A conceptual flowsheet for heap leaching of platinum group metals (PGMs) from a low-grade ore concentrate @article{Mwase2012ACF, title={A conceptual flowsheet for heap leaching of platinum group metals (PGMs) from a low-grade ore concentrate}, author={James Malumbo …
Existing processes for the recovery of platinum group metals (PGM) from UG-2 ores place stringent requirements with regard to chromite content upon feed material to the plant. An alternative hydrometallurgical process for which this is not an issue is proposed that involves reductive roasting of the ore followed by leaching with …
ABSTRACT Porphyry copper and mixed copper-gold sulfide deposits contain varying amounts of precious (gold and silver) and platinum group metals (PGMs). Currently, milling and froth flotation is the most common processing route for the treatment of high-grade base metal sulfide ores. During this process, the precious metals and …
1. Introduction. The platinum group metals (PGMs) consist of six elements: rhodium, ruthenium, palladium, platinum, iridium, and osmium. These metals are used in such areas as catalysts, both petrochemical and automotive catalytic converters [1], hydrogen fuel cells [2] and electronics [3].Platinum and palladium are desirable …
The best platinum leaching results so far were obtained with two methods, both of which used a leaching mixture based on sulfuric acid and hexamethyldisiloxane …
Contrasting platinum‑group element geochemistry of post‑collisional porphyry Cu ± Au ore‑bearing and barren suites in the central and southeastern Urumieh‑Dokhtar magmatic arc, Iran Jiwon Hwang1 · Jung‑Woo Park1,2 · Bo Wan3 · Maryam Honarmand4 Received: 26 May 2022 / Accepted: 16 July 2023 / Published online: 29 July 2023
Platinum and palladium recovery Leaching abstract Platinum Group Metals (PGMs), often with associated gold, have very few occurrences where they are present in an ore deposit at economically ...
[J]. Platinum Metals Review, 2012, 56(1): 2âˆ'19. [3] MUDD G M. Key trends in the resource sustainability of platinum group elements [J]. Ore Geology Reviews, 2012, 46(2): 106âˆ'117. [4] MWASE J M, PETERSEN J, EKSTEEN J J. A conceptual flowsheet for heap leaching of platinum group metals (PGMs) from a low-grade ore concentrate [J].
most sophisticated industrial inorganic chemistry: 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.
Platinum Group Metals (PGMs), often with associated gold, have very few occurrences where they are present in an ore deposit at economically extractable levels.
Spent automotive catalysts consist of platinum group metals (PGMs) in their leaching residue (LR) after wet extraction and are the leading secondary resource of PGMs. Herein, PGMs were captured from the LR of spent automotive catalysts by NiSO_4 smelting, followed by treatment with sulfuric acid to enrich PGMs from the trap. The effects of the …
DOI: 10.1016/S1003-6326(19)65017-X Corpus ID: 199170840; Oxygen pressure leaching–flotation joint process for Jinbaoshan platinum group minerals @article{Rao2019OxygenPL, title={Oxygen pressure leaching–flotation joint process for Jinbaoshan platinum group minerals}, author={Shuai Rao and Zhiqiang Liu and Xian …
sbm/sbm cesium ore leaching machinery costsale.md -rw-r--r-- 20.3 KiB . View; Log; Blame; View raw; Permalink; 8318c03c — maekesi push 6 months ago
The cyanide leach should be operated for 50 days or more to achieve 50% platinum extraction if the linear trend (from the cyanide leach experiment) in Fig. 6 continues for the heap cyanide leach process. This will depend on the mineralogy of the …
Platinum and palladium can be present as iron "micro-alloys" type [Pt-Pd] x Fe y (Maier et al., 2003, Stone, 1990). No detailed mineralogy. Conclusions. The PGM (platinum, palladium and gold) leaching from magnetite ore is possible in the presence of chlorides using ozone as the oxidizing agent.
Keywords: platinum group metals; value chain; refining; leaching 1. Introduction The platinum group metals (PGMs) are a family of six metals. They are rare and possess …
Existing processes for the recovery of platinum group metals (PGM) from UG-2 ores place stringent requirements with regard to chromite content (about 2.8 per cent) upon feed …
The aim of this study is to investigate the economic and technical feasibility of processing platinum group metals (PGMs) and base metals (BMs) from a low-grade ore concentrate produced in the concentrator plant at Lonmin Pic. The PGMs of particular interest are platinum, palladium, ruthenium and rhodium, while the BMs of interest are copper and …
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The complexity of platinum processing arises from the presence of other platinum group metals (PGMs) that often coexist with platinum in the ore. Value and Applications: Platinum and gold have distinct values and applications. Gold has been prized for its beauty and value for centuries and is predominantly used in jewelry and …
The platinum group metals (PGMs) comprise 6 elements, which are platinum, palladium, rhodium, ruthenium, iridium, and osmium. These metals have high melting points, high heat resistance, high corrosion resistances, and unique catalytic properties. Owing to these properties, PGMs are being used widely in many industrial fields, most notably as …
A standard platinum flowsheet achieves this by smelting of the ore concentrate before leaching. In In the present case a hydrometallurgical iron removal step may be required depending on the …
Heap leaching has also been considered for zinc and nickel and more lately for platinum group metal (PGM)-bearing ores and electronic scrap . In heap leaching, the crushed ore is stacked on an …
Spent automotive catalysts consist of platinum group metals (PGMs) in their leaching residue (LR) after wet extraction and are the leading secondary resource of PGMs. Herein, PGMs were captured from the LR of spent automotive catalysts by NiSO4 smelting, followed by treatment with sulfuric acid to enrich PGMs from the trap. The …
The platinum group metals (PGMs) and associated minerals are particularly refractory to most traditional direct leach processes. However, the remoteness of many new ore deposits, socio-political risks, the scarcity of skilled labour and constraints on the availability of water and electrical power makes it increasingly more difficult to implement the …
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 ...
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 …
A novel sequential heap leaching process has been identified as a possible alternative to the conventional concentrate–smelt–refine route for processing Platreef ore, a platinum group metals ...