Platinum Group Metals (PGMs) are recovered through underground and open pit mining from poly-metallic sulphide ores containing PGMs, Nickel, Copper and other metals: • 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
Jun 25, 2019· The first step in extracting rhodium from the ore is precipitating precious metals such as gold, silver, palladium, and platinum. The remaining ore is treated with sodium bisulfate NaHSO 4 and melted, resulting in rhodium (III) sulfate, Rh 2 (SO 4) 3.
Distribution of palladium values in the concentrates ranged from 26 to 63 pct and that of platinum from 72 to 90 pct. Best platinum and palladium recoveries were obtained from diethyl xanthogen formate as the collector. Increasing the amount of each collector to 0-2 lb/ton .
Assaying ores and concentrates for platinum-group metals is extremely difficult, since the concentration of any particular metal may be less than one part per million. Initial concentration is achieved by fire assay. The assay bead is dissolved in aqua regia and the metals separated and concentrated, often by solvent extraction. ...
A flowsheet has been developed for the production of rich concentrates of precious and non-ferrous metals by a complex treatment of the flotation products from South African platinum-containing chrome ores. The procedure involves: autoclave leaching, roasting, hydrochlorination and precious metal recovery by sorption. Autoclave oxidative leaching of the initial material allows the non-ferrous ...
Dec 11, 2019· Basically, what I have is an ore that is very high in metallic platinum. I have a proprietary process for extracting it and I have found that I can make it precipitate by itself as PtCl6 without the use of ammonium chloride simply by keeping the concentration very high and adjusting the PH.
By the old method of determining platinum in ores and bullion, the silver-alloy first obtained in the regular course of assay is parted in strong sulphuric acid and the residual metal weighed. This is re-alloyed with silver by a second cupellation and parted in nitric acid, the residual metal being again weighed. Any difference shown between the two weighings is assumed to be, and is called ...
Platinum mining on a large scale began around 1926, and before the 1920s were over, no less than seven mining operations had started in South Africa. The platinum ores were mostly processed by traditional milling and gravity-table concentration.
Assaying ores and concentrates for platinum-group metals is extremely difficult, since the concentration of any particular metal may be less than one part per million. Initial concentration is achieved by fire assay. The assay bead is dissolved in aqua regia and the metals separated and concentrated, often by solvent extraction.
An assessment of methods currently available for the accurate determination of low concentrations of platinum in ores and mineral concentrates indicated that prior treatment of the sample by fire assay procedures is necessary. To enable rapid determinations to be carried out, instrumental methods applied to the metallic bead produced from the fire assay treatment have...
Platinum Group Elements (PGEs) Platinum group elements are mined from mafic and ultramafic igneous rocks, in alluvial and placer deposits, hydrothermal veins, and contact mineralization deposits. They also occur in the mineral cooperite and in igneous rocks (Pohl, 2011). Here is a map of all PGE deposits in the world: (Goodfellow, 2006)
The basic step of extracting metals is called concentration of ores. Concentration of Ores. The ores contain a lot of impurities that need to be filtered. The filtration of these impurities from ores is known as concentration. Concentration can be done by gravity separation .
The concentration of cerium, the most abundant rare earth, is approximately the same as that of copper although the other REEs are much rarer. However, REEs are not usually concentrated in ore deposits in amounts that can be easily or economically mined (Long, 2010).
centrating and recovering platinum-group metals (PGM) and associated base metals from ores from the Stillwater Complex, Montana, because it is the only major U.s. PGM resource (1-4).4 The most sig nificant PGM mineralization occurs in conjunction with iron, .
A process for treating chromite-bearing ores to obtain useful mineral values, especially platinum group metal, therefrom wherein the ore is separated into magnetic and non-magnetic fractions; the non-magnetic fraction, containing a substantial portion of the platinum group metals, is concentrated and smelted to produce a metal layer containing platinum group metals; and the platinum group ...
Platinum is commonly found as the native (natural) platinum and as alloy with the other platinum-group. Platinum usually occurs in the ores of nickel and copper. Platinum also occurs naturally in the alluvial sands (commonly found in rivers). Platinum occurs with the concentration of only (about) 0.005 ppm in the Earth's crust. Alloys of Platinum
the nine rarest "metals" (the six platinum group elements and Au, Re, and Te) are in the yellow field. Figure (PageIndex{2}): Three Common Ores. (left) Iron ore, (middle) Manganese ore – psilomelane, and (right) Lead ore – galena and anglesite. ... Concentration of ores may be achieved by froth flotation in which an ore is contained in a ...
Platinum can occur as a native metal, but it can also occur in various different minerals and alloys. That said, Sperrylite (platinum arsenide, PtAs 2) ore is by far the most significant source of this metal. A naturally occurring platinum-iridium alloy, platiniridium, is found in the mineral cooperite (platinum sulfide, PtS).
Mining and plant disciplines can benefit from pre-concentration of UG2 platinum ores in a dense medium separation (DMS) plant. The main benefit of DMS is the selective discard of waste from the feed stream, thus improving project economics while reducing the power and water requirements for processing.
Because the ore is sulfidic in nature, it was concentrated by froth flotation. A 45 kg/h process development unit (PDU) was constructed and 85 to 95% of the platinum and palladium were recovered from the ore by using mercaptobenzothiazole or sodium isobutyl xanthate as collectors.
As a rule of thumb, open pit mining can process ore for $10 per tonne and, where the ore grade is more than double that at $20 per tonne, results would be economic. Consider that 1% of a metric ...
The ores are very different from the finished metals that we see in buildings and bridges. Ores consist of the desired metal compound and the impurities and earthly substances called Gangue. The extraction of metals and its isolation occurs over a few major steps: Concentration of Ore; Isolation of metal from concentrated Ore; Purification of ...
Platinum is commonly found as the native (natural) platinum and as alloy with the other platinum-group. Platinum usually occurs in the ores of nickel and copper. Platinum also occurs naturally in the alluvial sands (commonly found in rivers). Platinum occurs with the concentration of only (about) 0.005 ppm in the Earth's crust. Alloys of Platinum
PRECONCENTRATION OF UG2 PLATINUM ORE: ECONOMIC BENEFITS TO MINE, PLANT, AND SMELTER F. Smit DRA Mineral Projects V. Coetzee DRA Mineral Projects M. Seymour DRA Mining S. Notnagel DRA Mining Abstract Mining and plant disciplines can benefit from pre-concentration of UG2 platinum ores in a dense medium separation (DMS) plant.