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Figure 1: The flotation system includes many interrelated components, and changes in one area will produce compensating effects in other areas (Klimpel, 1995) Froth flotation is a good example of an engineering "system", in that the various important parameters are highly inter-related, as …
There has been considerable interest in using platinum electrodes to make E h measurements in flotation pulp solutions and monitoring platinum potential during laboratory flotation has become almost standard practice (Hintikka and Leppinen, 1995; Labonte and Finch, 1988).
The Anglo Platinum Bubble Sizer is a portable device to measure both the bubble size distributions and the superficial gas velocity Jg directly within a flotation cell. With the mean bubble size db and Jg the bubble surface area flux Sb can be calculated: Sb = 6Jg/db
EFFECT OF ALTERATION ON THE MINERALOGY AND FLOTATION PERFORMANCE OF PPM PLATINUM ORE Megan Becker 1, Mpho Ramonotsi1,2, Jochen Petersen 1Dept of Chemical Engineering, University of Cape Town ...
Froth flotation is a process for selectively separating hydrophobic materials from hydrophilic. This is used in mineral processing, paper recycling and waste-water treatment industries. Historically this was first used in the mining industry, where it was one of the great enabling technologies of the 20th century.
A state of the art review of pulp potentials in sulfide mineral flotation was presented. The measurement and interpretation of pulp potentials in sulfide mineral flotation dates back more than 30 years, yet the transfer of knowledge of pulp potential to industrial practice has been exceedingly slow.
09.10 Predicting flotation behaviour – the interaction between stability and performance S.J. Neethling and P.R. Brito-Parada (Imperial College, UK) 09.30 A novel method for the measurement of flotation recovery by means of 4D particle tracking velocimetry
Platinum – Palladium Flotation Summary. ... Bench-scale experiments showed that rougher flotation recovered 91 pct of the platinum and 88 pct of the palladium in a concentrate assaying 2.6 oz/ton Pt and 8.8 oz/ton Pd. When the rougher concentrate was cleaned, a cleaner concentrate was obtained that had more than twice the Pt-Pd content of the ...
during flotation. The force measurements conducted between hydrophobic glass sphere ... A platinum wire (e) placed near the working electrode serves as a reference electrode, while another platinum wire (f) located in the upper part of the liquid cell serves as the counter electrode. A hydrophobized glass sphere of 15-25 µm
THE FLOTATION OF HIGH TALC-CONTAINING ORE FROM THE GREAT DYKE OF ZIMBABWE by VELAPHI MOSES NASHWA Supervisors: Doctor M. K. G. Vermaak and Professor J. C. Davidtz Department of Materials Science and Metallurgical Engineering University of Pretoria Abstract This project investigates the optimisation of platinum-group metals recovery at the
The application of contact angle measurement as a method for flotation collector evaluation ... burg, 1947, South Africa 2 Anglo Platinum Corp. Ltd., P.O. Box 62179, Marshalltown, South Africa Received 30 January 2003; accepted 20 July 2004 ABSTRACT Contact angle measurement of flotation reagents (called collectors) on coal is used for ...
In the present study the effect of using different grinding media, viz, ceramic balls, forged steel balls, 15% Cr steel balls, stainless steel and mixture of stainless steel and 15% Cr steel balls (50:50) on the flotation performance of a Platinum Group Mineral (PGM) UG2 ore was investigated. Test work was
The 4th International Platinum Conference, Platinum in transition 'Boom or Bust',The Southern African Institute of Mining and Metallurgy, 2010. Flotation process optimization through frequent in-line grade measurement as an alternative to sampling surveys that deliver outdated results K. KEET and F.E. DU PLESSIS Blue Cube Systems Pty. (Ltd.)
THE ESTIMATION OF PLATINUM FLOTATION GRADE FROM FROTH IMAGE FEATURES 145 The inertia is a measure of the number of local variations in the image. Therefore an image with a large number of local variations will have a larger value of inertia. Local homogeneity (fi, 4)  Homogeneity is the measure of the tendency of similar grey levels to be ...
Texture and Bubble Size Measurements for Modelling Concentrate Grade in Flotation Froth Systems Gordon Forbes Thesis Presented for the Degree of DOCTOR OF PHILOSOPHY
FUNDAMENTALS OF THE FLOTATION BEHAVIOUR OF PALLADIUM BISMUTH TELLURIDES by Matthys Karel Gehardus Vermaak Submitted in partial fulfillment of the requirements for the degree Philosophiae Doctor (Metallurgical Engineering) In the Faculty of Engineering, Built Environment and Information Technology. Supervisor: Prof. P.C. Pistorius May 2005
In the present study, the value and limitations of E h and DO measurements in a Merensky PGM ore flotation were discussed based on the measurements of redox potential of sulphide mineral electrodes present in the ore and a platinum electrode. In addition to that the effect of different grinding media on pulp chemistry and froth stability were ...
Effect of Alteration on the Mineralogy and Flotation Performance of PPM Platinum Ore ... Bulk density measurements of the various lithologies show a clear decrease in density with decreasing depth ...
Flotation behaviour of chromite with respect to beneficiation of UG2 ore 1181 Zeta potential measurements Zeta potential measurements were determined On the chromite without reagent addition and thereafter in the presence of 1 x 10-4 M copper sulphate (the highest concentration of copper sulphate used in the microflotation tests).
The large proportion of gangue minerals present in platinum bearing ores in South Africa provides challenges to the flotation and downstream processes. In order to take effective measures to reduce their recovery in flotation, an understanding of the mechanisms and factors influencing their behaviour is needed. Typical gangue
laboratory-scale platinum froth flotation cell in an effort to determine the relationship between the platinum grade and a combined set of image features and process conditions. A fractional factorial design of experiments was conducted, investigating 6 process conditions, namely air flow rate (x1), pulp level (x2), collector dosage (x3),
Flotation cells are an essential component in platinum group mineral recovery processes and the optimal rotational speed is critical to efficient operation. A Motornostix MXD bluetooth wireless solution with rotational speed sensors mounted on the top of the rotating assembly provides regular and frequent measurements of the speed in rpm. The data is collected wirelessly and …
Experimental measurements The physical locations for the experimental measurements were dependent on the mechanical constraints of the individual flotation cell being measured. However, where possible measurements were made at up to six different locations in the flotation cell as per the method of Gorain et al. (1995a, 1995b).
"The recovery of base metal sulfides has been emphasized in the study of the flotation of platinum group minerals (PGMs). However, in some ore bodies such as the Platreef of the Bushveld Complex, sulfide minerals do not make up the majority of the more significant PGM mineralization.
platinum group element (PGE)-bearing ore from the Bushveld Complex in South Africa confirm an improved metallurgical performance at very low substitutions (approx. 5 molar per cent) of SiBX. The improved recoveries for PGE, Cu, and Ni are correlated with improvements in the flotation kinetics of their slow-floating components.
flotation process is much more dynamic than generally accepted. Data was collected for a 4 hour period from a single Rougher concentrate on a Platinum Concentrator to evaluate the response of percentage solids and PGM (Platinum Group Metal) grade to air addition. Figure …
Electrochemical interactions of platinum group minerals with copper sulphate ... In the flotation of platinum group minerals (PGMs) in South ... Rest potential measurements were made in the absence of reagents for 600 s followed by addition of CuSO 4 followed by a further measurement for 600 s and finally measurements were made for 600 s after ...
----- PYRITE DEPRESSION BY REDUCTION OF SOLUTION OXIDATION POTENTIAL Department of Mineral Engineering University of Utah Salt Lake City, Utah 84112 for ENVIRONMENTAL PROTECTION AGENCY WATER QUALITY OFFICE Grant Number 12010 DIM December, 1970
Jun 01, 2002· Read "The use of electrochemical measurements in the flotation of a platinum group minerals (PGM) bearing ore, Minerals Engineering" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.
The chemistry of pyrrhotite flotation using xanthate collectors is reviewed with respect to the processing of PGM ores and the recent results from captive bubble contact angle measurements at the University of Utah are presented. In some cases a low
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