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Showing 1 to 19 of 19 for “"Platinum group minerals"”.
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An electrochemical investigation of platinum group minerals
… is the largest ore body in the world hosting platinum group elements (PGEs). It is a stratified orebody with three major reefs namely, the Merensky reef, UG2 reef and the Platreef. Platinum and palladium are the most abundant PGEs found in the Bushveld complex. They occur in the form of …
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Application of the 190Pt-186Os isotope decay system to dating platinum-group minerals
Constraining the formation age of platinum-group minerals (PGM) in placer deposits has traditionally been very challenging. The 190Pt-186Os decay system, measured by laser ablation multi-collector ICPMS (LA-MC-ICPMS), has been demonstrated as a useful geochronometric tool for detrital PGM grains. …
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Distribution of Platinum Group Elements in the New Afton Alkalic Cu-Au Porphyry Deposit, Kamloops, British Columbia
… the Canadian Cordillera. Bulk rock and sulfide minerals from New Afton contain potentially economic concentrations of platinum group elements (PGE). Primary PGE (Pd ± Pt) enrichment occurs within the main Cu-Au ore body and is spatially associated with the Cherry Creek monzonite. Platinum group …
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An investigation into the floatability of platinum group arsenides and tellurides under varying collector and solution chemistries
Platinum group tellurides and arsenides are the most economically important and abundant platinum group minerals (PGM) in the Platreef ore deposit. It has been found that there are major losses of these minerals during flotation, with most of the losses attributed to sperrylite (PtAs2). This study …
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Surface characterisation and flotation behaviour of the platinum and palladium arsenide, telluride and sulphide mineral species
… ore to separate the siliceous gangue from the platinum group minerals (PGM) and base metal sulphides. The PGE arsenide and telluride minerals are considered to be slow floating when compared to other PGMs as there is evidence of them reporting to the tailings.This thesis aimed to investigate …
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Developing a framework for the design of the milling and rougher circuits for a platinum-bearing UG2 ore
… western limb of the Bushveld Igneous Complex, platinum is mined predominantly from two reefs – Merensky and UG2. Most of the platinum group minerals (PGM’s) in Merensky ore are associated with base metal sulphides (BMS), and thus Merensky concentrators will usually resemble simple BMS circuits. …
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Investigation of the surface properties of gangue minerals in PGM bearing ores
The recovery of Platinum Group Minerals (PGM) and associated sulphides by froth flotation from the Bushveld Igneous Complex is complicated by the presence of naturally floatable gangue minerals such as talc. Although talc is present in small quantities it has a disproportionate effect on …
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Study of effect of process parameters and their interaction in the flotation of UG2 ore
… mineral processing industry to extract valuable minerals from the ore. The fundamental steps in this separation process are the attachment of hydrophobic valuable minerals to bubbles, and the subsequent accumulation of the bubble-particle aggregates in the froth phase. Processing of UG2 ore for …
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Development of the Platreef in the northern limb of the Bushveld Complex at Sandsloot, Mokopane District, South Africa
… on a footwall (floor) sequence of Transvaal Supergroup sedimentary rocks and Archaean granite/gneiss basement, and is overlain by a hangingwall (roof) of Main Zone gabbronorites. Structural relationships suggest that the Platreef was emplaced as a broadly horizontal sill-like sheet into the …
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The application of a machine vision system to relate to froth surface characteristics to the metallurgical performance of a PGM flotation process
… operation aimed at the beneficiation of Platinum Group Minerals. The machine vision system employed made use of the Fast Watershed Transform to resolve the froth surface into a distribution of bubble sizes. This distribution was then used to describe changes occurring in the structure of …
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Investigating the use of sodium metasilicate to improve the flotation performance of altered PGE ores
… flotation recoveries and grades within primary platinum group element ores worldwide. This is because the phyllosilicate minerals derived from hydration reactions of silicate minerals (i) form electrostatic coatings on valuable minerals that in turn hinders collector adsorption, (ii) alter the …
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Investigation of the effect of the reagent suite in froth flotation of a Merensky ore
… for a wide range of applications. The valuable minerals, PGMs (Platinum Group Minerals) and BMS (Base Metal Sulphides) in the ores are extracted through the aid of chemical reagents (activators, collectors, depressants, frothers, modifiers) which are added to the flotation circuits to facilitate …
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The effect of copper sulphate on froth stability
… process implemented in the recovery of valuable minerals from unwanted gangue material. Copper sulphate is used as an activator in the flotation of base metal sulphides (BMS) as it promotes interaction of collector molecules with the mineral surfaces. It is also used in certain platinum group …
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On the selective flotation of pentlandite from pyrrhotite in Sheba's Ridge ores
… and can be considered one of the most important group of ore minerals. In the context of South Africa, the Bushveld Igneous Complex (BIC) sulphides play a very important role in that they are largely associated with the valuable platinum group elements (PGEs) and platinum group minerals (PGMs). …
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A Process Mineralogical Study on the effect of Alteration on the Flotation of Great Dyke Platinum Group Element (PGE) Ores
… differences between three Great Dyke platinum group element (PGE) ores in Zimbabwe. These ores are known to be characterized by extensive oxidation and alteration resulting in numerous metallurgical challenges in recovering the PGE. The behaviour of three different ores sampled along …
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Κοιτασματογένεση πλατινοειδών ορυκτών και χρωμιτών συνδεόμενων με την πετρογενετική εξέλιξη των οφιολιθικών συμπλεγμάτων Βούρινου και Πίνδου
Στα πλαίσια της παρούσας διατριβής μελετήθηκαν οι διεργασίες κοιτασματογένεσης των χρωμιτιτικών εμφανίσεων των οφιολιθικών συμπλεγμάτων του Βούρινου και της Πίνδου, σε συνδυασμό με τη συνδεόμενη με αυτές μεταλλοφορία των στοιχείων της ομάδας του λευκόχρυσου (PGE). Ιδιαίτερη έμφαση δόθηκε επίσης …
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An investigation into the complementary capabilities of X-ray computed tomography and hyperspectral imaging of drill core in geometallurgy
… in geometallurgy for identifying problematic minerals in downstream mineral processing, such as the phyllosilicates (e.g., kaolinite, serpentine and talc). However, it only provides 2D imaging of the core, and its mineral identification is limited to minerals that show a definitive spectral …
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Investigating the use of sodium silicate to improve the flotation performance of Platreef and UG2 PGE ores
… (BIC) in South Africa is one of the largest platinum group minerals (PGM) depositories in the world. Due to the depletion in high grade ores, there has been a shift to processing low grade, mineralogically complex, finely disseminated and often altered ores. These ores require fine grinding …
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ΚΑΤΑΝΟΜΗ ΤΩΝ ΣΤΟΙΧΕΙΩΝ ΤΗΣ ΟΜΑΔΑΣ ΤΟΥ ΛΕΥΚΟΧΡΥΣΟΥ (PGE) ΚΑΙ ΤΟΥ ΧΡΥΣΟΥ ΣΕ ΧΡΩΜΙΤΙΚΑ ΜΕΤΑΛΛΕΥΜΑΤΑ ΚΑΙ ΠΕΤΡΩΜΑΤΑ ΤΟΥ ΟΦΙΟΛΙΘΙΚΟΥ ΣΥΜΠΛΕΓΜΑΤΟ...
THE DISTRIBUTION OF PLATINUM GROUP ELEMENTS IN VOURINOS OPHIOLITE COMPLEX REVEALED A SIGNIFICANT VARIATION IN THE COMPOSITION OF CHROMITE ORES AND HOST ROCKS,WHICH WAS CONSIDERED BY PREVIOUS AUTHORS TO BE VERY RESTRICTED. CHROMITE AND HOST ROCK GEOCHEMISTRY STUDY THROUGHOUT THE VOURINOS OPHIOLITE …