The effect of mixed thiol collectors on the flotation of …
Mixtures of ethyl xanthate with ethyl dithiocarbamate were shown to significantly increase rate and recovery of galena flotation above those of the single collectors. Mixtures of ethyl xanthate and ethyl dithiophosphate showed smaller improvements in recovery. ... Sperrylite contributes about 21% to the total platinum …
اقرأ أكثر
Pyrrhotite
The xanthate ions continue to bond with the chalcopyrite at this pH. As a result, the chalcopyrite particles remain hydrophobic and readily attach to rising bubbles in a flotation cell. ... Cobalt and Platinum Group Metals, 2011. 15.4.4 Frothers. Collectors and modifiers give selective flotation of pentlandite particles from rock and pyrrhotite ...
اقرأ أكثر
An investigation into electrochemical interactions …
In the flotation of platinum group minerals (PGMs) containing significant amounts of tellurides and arsenides it is generally assumed that these minerals will …
اقرأ أكثر
Xanthate
An unprecedented coordination of xanthate, with one sulfur bridging three platinum centers, was observed in [NBu 4][Pt 4 (C 6 F 5) 8 (S 2 COEt) 2]. ... On the other hand, Sinaÿ et al. 179a–179c introduced an anomeric S-xanthate as a leaving group of the glycosyl donor with Cu(OTf) ...
اقرأ أكثر
Investigation into the mineralogy and flotation
1. Introduction. The 2.05 Ga Bushveld Complex in South Africa is host to some of the world's major platinum group mineral (PGM) ore deposits such as the Merensky reef, UG2 reef and Platreef.Although the majority of the mines exploiting these deposits have underground workings, several open cast operations do exist, most notably …
اقرأ أكثر
Precise stepwise recovery of platinum group metals …
Accurate separation and efficient recovery of platinum group metals (PGMs, mainly Ru, Rh and Pd) from high level liquid waste (HLLW) is a good choice for clean …
اقرأ أكثر
An investigation into the electrochemical interactions between platinum …
An investigation into electrochemical interactions between platinum group minerals and xanthate: voltammetric study. Miner. Eng., 70 (2015), pp. 148-155. View PDF View article View in Scopus Google Scholar. Usul and Tolun, 1974. A. Usul, R. Tolun. Electrochemical study of the pyrite–oxygen–xanthate system.
اقرأ أكثر
17
Adsorption of xanthate (%) 10 15 1 2 3 20 25 30 0 10 20 30 40 50 60 70 80 . Conditioning time with xanthate (minutes) Figure 17.1 Relationship between adsorption of xanthate on gold and conditioning time in the presence of various concentrations of xanthate. Flotation behaviour of gold associated in the platinum group metals is apparently the
اقرأ أكثر
Xanthate chemisorption on lead sulfide
An investigation into electrochemical interactions between platinum group minerals and xanthate: Voltammetric study. 2015, Minerals Engineering. Show abstract. In the flotation of platinum group minerals (PGMs) containing significant amounts of tellurides and arsenides it is generally assumed that these minerals will respond in the same way …
اقرأ أكثر
(PDF) Alkyl Xanthates: New Capping Agents for Metal
Abstract and Figures. We investigate the properties of long-chain alkyl xanthate-capped platinum nanoparticles. First an uncapped platinum colloid, 4.0 ± 1 nm in diameter, is produced in an ...
اقرأ أكثر
Flotation of platinum group metal ore materials
Provided is a method involving flotation of a feed of platinum group metal ore material to prepare a platinum group metal concentrate during mineral processing operations. Prior to and/or during the flotation, a lead-containing activator reagent and a xanthate collector reagent are added to the slurry and during the flotation, an oxygen-deficient flotation gas, …
اقرأ أكثر
Full article: The Application of a Nitrile-based …
For several years, a combination of xanthate and dithiophosphate (DTPs) has been the preferred, reagent suite in PGM flotation concentrators (Grobler, Sondashi …
اقرأ أكثر
A safer and more efficient solution for …
Clariant, an innovative speciality chemicals company is responding to these challenges by rolling out speciality solutions in copper, platinum and gold base metal mining sectors, with the implementation of …
اقرأ أكثر
An investigation into electrochemical interactions between platinum …
1. Introduction. The distribution of platinum group minerals (PGMs) in the Platreef is variable. It has been found that the majority of the platinum group minerals belong to the telluride group which is unlike the distribution of PGMs in the other PGM bearing reefs (Merensky and UG-2) where the majority have been found to belong to the …
اقرأ أكثر
Potential Processing Routes for Recovery of Platinum Group …
The beneficiation of platinum group metals (PGMs) from pristine (unweathered) sulfide ores has conventionally been conducted through froth flotation, which typically achieves platinum recoveries of over 85%. ... Conventional xanthate collector achieved 68% Pt and 67% Pd recoveries, while the use of modified xanthate (PM230) …
اقرأ أكثر
An investigation into electrochemical interactions between platinum
Request PDF | An investigation into electrochemical interactions between platinum group minerals and xanthate: Voltammetric study | In the flotation of platinum group minerals (PGMs) containing ...
اقرأ أكثر
Full article: The Application of a Nitrile-based Collector in the
Declining ore grades and increasing mineralogical complexity of the South African platinum group mineral (PGM) ores have prompted the industry to investigate novel collectors that could outperform thiol collectors. One such example is Tecflote TM, a family of patented nitrile-based collectors for sulfide flotation by Nouryon, Sweden (Lewis and ...
اقرأ أكثر
An investigation into the electrochemical interactions between platinum …
An investigation into the electrochemical interactions between platinum group minerals and sodium ethyl xanthate and sodium diethyl dithiophosphate collectors: Mixed potential study. Author links open ... Xanthate degradation tests showed that more than half of the collector in solution was consumed in 10 min of reacting 20 mg/L of xanthate ...
اقرأ أكثر
Investigating the recoveries and grades of individual platinum group …
As primary collector, sodium isobutyl xanthate (SIBX) was compared to a novel mass pull enhancer, a fines collector, a coarse ore collector and blends containing the novel reagents. Significant recovery improvements were seen across the whole basket. ... UG2 chromite ore is the dominant ore type being treated for platinum group element …
اقرأ أكثر
Pilot Mill Flotation of Serpentinized Platinum …
platinum-palladium grade. Grade was low er and recovery only slightly higher when 0.4 lb xanthate per ton of ore was used. Efforts were made to improve recov ery and grade. Data reported by Shaw (7) on floating a platinum-bearing sul fide ore indicated that a combination collector consisting of sodium isobutyl
اقرأ أكثر
10: Solubility products of various metal xanthates (In …
The reason for this can be explained from the solubility products of the metal xanthate species (figure 2.10). ... Bench-scale flotation tests using mixtures of SiBX/DTP/nC12-TTC on a platinum ...
اقرأ أكثر
Comparison of single and mixed reagent systems for flotation of copper …
Alternatively, Corin et al. (2012) could not find any evidence of a synergistic effect between diethyl dithiophosphate (DEDTP) and isobutyl xanthate (IBX) for a platinum group ore. The authors reported that the dithiophosphate led to stabilisation of the froth phase and does not contribute to enhancing the hydrophobicity of the mineral surface.
اقرأ أكثر
Synthesis and Structure-Activity Relationship of Novel …
Thioplatins [68], a group of platinum xanthate derivatives, are significantly more cytotoxic if treated cancer cell cultures are maintained at pH 6.8 instead of pH 7.4. They show potent antitumor ...
اقرأ أكثر
Electrochemical interactions of industrially important platinum
The cyclovoltammograms of Pt–Te 2 and Pt–Bi–Te obtained in the presence of xanthate (10 −3 M) buffered at pH 9.2 are also shown, respectively, in Fig. 1, Fig. 2.Pt–Te 2 shows a strong anodic behaviour at potentials >120 mV in the presence of xanthate; this potential corresponds well with the reversible potential for the xanthate–dixanthogen …
اقرأ أكثر
An investigation into electrochemical interactions between platinum
Introduction. The distribution of platinum group minerals (PGMs) in the Platreef is variable. It has been found that the majority of the platinum group minerals belong to the telluride group which is unlike the distribution of PGMs in the other PGM bearing reefs (Merensky and UG-2) where the majority have been found to belong to the …
اقرأ أكثر
Activation mechanism of ammonium oxalate with pyrite in …
After ammonium oxalate and ethyl xanthate treatment, the hydrophobicity of pyrite increased significantly, and the contact angle increased from 66.62° to 75.15° and then to 81.21°. ... The use of electrochemical measurements in the flotation of a platinum group minerals (PGM) bearing ore, Miner. Eng., 15(2002), No. 6, p. 395. Article CAS ...
اقرأ أكثر
The role of dithiophosphate as a co-collector in the …
In the present study the effect of adding sodium di-ethyldithiophosphate (DTP) to sodium isobutyl xanthate (SIBX) as a co-collector in the flotation of a platinum group …
اقرأ أكثر
The Use of Acid Mine Drainage (AMD) in the Flotation of a Platinum
This study investigated the viability of using AMD as a replacement for potable water in the flotation of a platinum-group-minerals (PGM)-bearing Merensky ore. ... A CuSO 4 activator was dosed at 20 g/t; sodium isobutyl xanthate (SIBX) was dosed at 100 g/t, and a frother, Sasfroth 200, was dosed at 50 g/t. A guar depressant, KU92, was …
اقرأ أكثر
[PDF] Effects of Sodium Iso-butyl Xanthate Dosage on The …
An investigation was carried out to determine the effects of collector concentration on the grade and recovery in the flotation of middle group 1-3 Platinum Group Metal (PGM) ore mixture. The ore mixture pulp at a relative density of 1.29 was subjected to "bead milling" test, particle size distribution analysis and the 55% passing 75 …
اقرأ أكثر
Electrochemical studies of the interaction of ethyl …
(xanthate) onto sulphide minerals (i.e. pyrrhotite, pentlandite and pyrite). However, the assumption that all PGMs remain associated with the base metal sulphides was challenged by the findings of Penberthy et al.4 who conducted a comprehensive study on the recovery of platinum-group elements from UG-2 chromite from the Bushveld Igneous Complex.
اقرأ أكثر