Recover PGM by Matte Smelting and Leaching
The PGM residue is upgraded by a series of steps: (1) sulfur removal, (2) sulfation roasting at 450° to 525° C to convert the residual copper, nickel, and iron sulfides to sulfates, and (3) H2SO4 leaching to remove the soluble sulfates. The final PGM residue contains more than 80 pet of the palladium and platinum in the ore.Web
اقرأ أكثرThe Role of Process Parameters in Platinum Casting
Introduction. In recent years articles on the casting properties of platinum have been published ().Different aspects such as suitable alloys for casting (), tree design and investment reactions have been discussed, as well as the effect of centrifugal casting parameters for different alloys and investments ().Platinum with 5 wt% cobalt (Pt-5Co) …Web
اقرأ أكثرPartitioning behavior of platinum group metals on the γ and γ
The partitioning behavior of platinum group metals (PGMs) on the γ and γ ′ phases of Ni-base superalloys has been investigated with alloys containing 5 mass% Re and 1 at.% PGMs. It was shown that Ru partitions preferably into the γ, while Rh, Pd, and Pt partition into the γ ′, and Ir partitions almost equally.The partitioning behavior is not …Web
اقرأ أكثرPlatinum Group Elements in the Environment: Emissions
The input to the environment of platinum group elements (e.g., Pt, Pd, Rh) associated with catalytic converters is becoming of increasing interest (Cinti et al., 2002; Dubiella-Jackowska and Namie ...Web
اقرأ أكثر(PDF) Metals: Platinum Group Elements Recovery …
The recovery of platinum group elements (PGE (platinum group element coating); Pd, Pt, and Rh) from used catalytic converters, using low energy and fewer chemicals, was developed using potassium ...Web
اقرأ أكثرCrystallographic Properties of Platinum
Crystallographic and bulk properties of platinum from absolute zero to the meZting point are assessed from a review of the literature covering the period 1901 to date. Selected values of thermal expansion are used to calculate the vari- at ion with temperature of length changes, lattice parameters, inter-atomicWeb
اقرأ أكثرRelativistic Phenomena in the Chemistry of the Platinum Group …
A highly significant feature of the chemistry of the elements at the end of the three Transition Series of the Periodic Table is the close similarity that exists between the six elements with partially occupied 4d and 5d orbitals, that is, the group known as the "platinum metals", and the marked difference between them and the three elements which have only 3d …Web
اقرأ أكثرDetermination of platinum group metals in dust, water, soil and
Platinum (Pt), palladium (Pd), Ruthenium and rhodium (Rh) (also referred to as platinum group metals (PGMs)) that are chemically and physically similar and these metals are released into the environment by anthropogenic activities such as road traffic and mining industries . 85% of the world`s PGMs production is in South Africa, and has 82% …Web
اقرأ أكثرPlatinum group | Chemical Properties, Uses
Platinum group, six metals, in order of increasing atomic weight, ruthenium (Ru), rhodium (Rh), palladium (Pd), osmium (Os), iridium (Ir), and platinum (Pt). The elements all possess a silvery white colour—except osmium, …Web
اقرأ أكثرMetals | Free Full-Text | Platinum Group Elements Recovery from …
The recovery of platinum group elements (PGE (platinum group element coating); Pd, Pt, and Rh) from used catalytic converters, using low energy and fewer chemicals, was developed using potassium bisulfate fusion pretreatment, and subsequently leached using hydrochloric acid. ... Optimization on the fusion and leaching parameter …Web
اقرأ أكثرWebElements Periodic Table » Platinum » crystal structures
β: 90.000°. γ: 90.000°. You may view the structure of platinum: interactively (best, but the page will take longer to load) or. non-interactively. Platinum crystal structure image (ball and stick style). Platinum crystal structure image (space filling style). The closest Pt-Pt separation is 277.5 pm implying a platinum metallic radius of ...Web
اقرأ أكثرPlatinum-group-metal catalysts for proton exchange
Platinum-group-metal catalysts for proton exchange membrane fuel cells: From catalyst design to electrode structure optimization ... sites; and a number of additional nucleation and growth parameters (the limit from the adsorption step during the nucleation process) are essential growth parameters to be studied. As with the preferred …Web
اقرأ أكثرGeochemical assessment of platinum group metals for phytomining
Geochemical assessment of platinum group metals for phytomining REM, Int. Eng. J., Ouro Preto, 73(1), 85-91, jan. mar. | 2020 Figure 1 - Mic rography of Ba ck-scatte red Elec trons show ing: Pt ...Web
اقرأ أكثرBehavior of Platinum Group Metals during Their Pyrometallurgical
The behavior of platinum group metals (PGMs) during their recovery with smelting of spent automotive ceramic catalysts powder in the presence of metallic copper at elevated temperatures is studied ...Web
اقرأ أكثر(PDF) Extraction of Platinum Group Metals
Ionic liquids (ILs) with amino moieties were designed and synthesized as extractants for the selective extraction of platinum group metal (PGM) ions into IL phases from mixed aqueous HCl solutions ...Web
اقرأ أكثرPlatinum-group element geochemistry used to determine Cu and …
Platinum on the other hand shows a moderate decrease, starting from the highest MgO sample analysed, but then decreasing strongly from 1.2 wt.% MgO. The initial Pt decrease is attributed to precipitation of a platinum-group mineral (PGM), probably a Pt-Fe alloy, and the sharp decrease of both Pt and Pd at 1.2 wtWeb
اقرأ أكثرPlatinum group metals (PGMs) for permanent implantable electronic
Platinum group metals (PGMs) are used to make essential components for a range of permanently implantable electronic devices, including heart pacemakers, defibrillators, stents and neurostimulators. The physical, chemical and mechanical properties of platinum, palladium and iridium make these metals and their alloys suitable for a …Web
اقرأ أكثرDetermination of Platinum Group Elements in Particulate
This study examined a method for determination of rhodium (Rh), palladium (Pd) and platinum (Pt) in particulate matter using standard solutions, model samples and certified reference materials (NIST 1648a and ERM CZ120). The method was based on microwave digestion followed by inductively coupled plasma mass spectrometry (ICP …Web
اقرأ أكثرDetermination of the milling parameters of a platinum group …
In this study, we used experimental results from the laboratory to determine the selection and breakage function parameters for a typical platinum group metal (PGM) ore. Parameters of these functions can be used in the simulator to find the remaining characteristic parameters of the selection and breakage functions, which makes the …Web
اقرأ أكثرPlatinum Group Elements in the Environment: Emissions and …
PGEs, also called platinum group metals (PGMs) in the international scientific literature, encompass such metals as platinum (Pt), palladium (Pd), rhodium …Web
اقرأ أكثرA conceptual flowsheet for heap leaching of platinum group metals …
This is the case at Western Platinum Limited (WPL) where the concentrator plant produces, as a by-product, a low-grade concentrate from the secondary cleaning circuit containing up to 29 g/t of platinum group metal (PGMs), 0.36% copper and 0.74% nickel and less than 0.5% S. In the case of UG2 ores, this low-grade concentrate is also …Web
اقرأ أكثرThe advantages of Additive Manufacturing for platinum group metals
The advantages of Additive Manufacturing for the processing of platinum group metals ... Major parameters to be considered were slice thickness, laser power, scanning speed, scanning order, hatch distance, field offset, border distance and platform material – in total more than ten essentially individual parameters. Fundamental issues are:Web
اقرأ أكثرPlatinum
The nature and distribution of platinum-group metal deposits in the world indicate that South Africa will remain the prime supplier of platinum and the USSR the prime supplier of palladium. ... Six series of tests were made to investigate the following parameters; (1) conditioning time with MBT and sulfuric acid added simultaneously to …Web
اقرأ أكثرAnalysis of Platinum Group Elements with the iCAP PRO …
Figure 1. The six Platinum Group Elements (PGEs). These can be further sub-divided into the Iridium-Platinum Group Elements (IPGEs: iridium, osmium and ruthenium), and the Palladium-Platinum Group Elements (PPGEs: rhodium, palladium and platinum). Since 1979, the automotive industry has used PGEs Table 1. Instrument and method parameters.Web
اقرأ أكثرDetermination of the milling parameters of a platinum group …
Chimwani et al. [3] did some work on the UG2 ore in order to determine the milling parameters of this platinum group mineral ore that will result in the optimum production of a desired size class ...Web
اقرأ أكثرDetermination of Platinum Group Elements in Geological
Geochemical studies of the behavior of platinum group elements (PGE) and gold in natural processes are important for solving many fundamental and applied problems and require the accumulation of a large amount of analytical information on the concentrations of these elements in samples of complex composition at the ppb–ppm …Web
اقرأ أكثرAnalysis of Platinum Group Elements with the iCAP PRO …
Figure 1. The six Platinum Group Elements (PGEs). These can be further sub-divided into the Iridium-Platinum Group Elements (IPGEs: iridium, osmium and ruthenium), and the …Web
اقرأ أكثرPlatinum-Group Element
Platinum-Group Element. Platinum group elements such as Pd, Ru, and Rh are likely to form an intermetallic compound, (U,Pu)(Pd,Ru,Rh)3, in the irradiated nitride …Web
اقرأ أكثرSite preference and alloying effect of platinum group metals in γ
Using supercell method, the alloying effect of platinum group metals (PGMs) on the lattice parameters of γ′-Ni 3 Al and the site preference of these elements are systematically studied based on first-principle full-potential linearized augmented-plane-wave method. Due to the addition of PGMs, the lattice parameters of γ′ is increased in the …Web
اقرأ أكثرDetermination of Platinum Group Elements in Geological
OF PLATINUM GROUP ELEMENTS AND GOLD Change in physicochemical parameters of plasma. Polyatomic superpositions are due to physicochemical interactions in high-temperature plasma, resulting in the formation of element ions and compounds. To eliminate or minimize these interferences, a number of methods were proposed based on a …Web
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