NIOSHTIC-2 Publi ions Search - 10004717 - The Flotation
The flotation of chalcocite, bornite, chalcopyrite, and pyrite has been studied in a microflotation cell in which the potential of a bed of the mineral particles could be controlled electromechanically. The ethylxanthate-induced flotation of each mineral is markedly dependent on electrochemical potential, with the recovery changing from 0 to 100 pct in potential intervals of - 0.2 V.
Collectorless flotation of Chalcocite by controlling redox
Abstract. Using microflotation method, this study explored the collectorless flotation of Chalcocite and its dependence on the redox potential of pulp . Electrochemical studies were performed by cyclic voltammetry in specific potential ranges and at different pH values. The results show that significant floatability of Chalcocite occurs in the specific reducing conditions.Cited by: 2
copper flotation parameters of chalcocite ore
copper flotation parameters of chalcocite ore. The fines are then leached or subjected to flotation to form a concentrate which is Heap leaching of secondary copper sulfides of chalcocite and covellite is a viable the aggressive leach parameters allow rapid recovery of all chalcocite. Chat Online.
Barry Wills' Blog: Flotation of chalcocite at very low pH
Aug 07, 2012& 0183;& 32;Chalcocite responds well to flotation. In Nchanga though it is lost mainly to very coarse and very fine size fractions of the concentrator tailings. This is because Nchanga flotation feed contains atypically high proportions of these fractions even at a moderate 55% passing 74 micron grind, a characteristic of Nachanga ore.
PDF JME - CiteSeerX
flotation of Chalcocite against potential at pH=4. Chalcocite showed good floatability in reducing conditions and the maximum recovery, 73%, was obtained at E= -222 mV Eh= -17 . By increasing the potential, the floatability of Chalcocite was reduced to 18% at potential 602 mV Eh=807 .
Mining Industry Copper Sulfide Ore and Flotation Process
Chalcocite exists in the many large scale porphyry copper deposits at home and abroad. The chalcocite is more oxidized than the chalcopyrite, copper ions enter the slurry, compli ing the flotation process and increasing the difficulty of separating.
Mineralogical Prediction of Flotation Performance for a
Chalcocite is highlighted as well, as the flotation domain of chalcocite does not overlap with the other copper sulphides . Carrollite is mainly associated with the background material and copper sulphides ranging from 50% in sample S8 and to 96% in sample S3 .
PDF The effect of microwave radiation on the flotation
An investigation into the effect of microwave radiation on the flotation of palangi sulphide copper ore containing chalcocite has been carried out.
A Novel Mineral Flotation Process Using Thiobacillus
Here, we report on a new use for T. ferrooxidans, in which bacterial adhesion is used to remove pyrite from mixtures of sulfide minerals during flotation. Under control conditions, the floatabilities of five sulfide minerals tested pyrite, chalcocite, molybdenite, millerite, and galena ranged from 90 to 99%.
Chalcocite: Mineral information, data and localities.
ID Species Reference Link Year Locality Pressure GPa Temp K 0000864: Chalcocite: Tomeoka K, Ohmasa M 1982 The modulated structure of cubic Cu9BiS6 the alpha phase American Mineralogist 67 360-372 1982: 0: 293: 0006938: Chalcocite: Will G, Hinze E, Abdelrahman A R M 2002 Crystal structure analysis and refinement of digenite, Cu1.8S, in the temperature range 20 to 500 C under controlled
PDF Process mineralogy as a key factor affecting the flotation
analyzed in the feed, concentrate, and the tailings of the flotation processes with two pulp densities of 25wt% and 30wt%. The major cop-per-bearing minerals identified by microscopic analysis of the concentrate samples included chalcopyrite 56.2wt% , chalcocite 29.1wt% , covellite 6.4wt% , and bornite 4.7wt% .
PDF Flotation of a Copper Sulfide Ore
Flotation of carbonaceous copper-bearing shale and copper sulfide minerals such as chalcocite and bornite in the presence of only frother was investigated.
PDF Magnetic Separation of Sulphide Minerals
under three headings: copper-flotation plants, lead-zinc-flotation plants, silver- flotation plants. These data are necessaril . incomplete and extremely condensed. Their bornite, sphalerite, and chalcocite. The 200 to 270-mesh fraction of the flotation concentrate was fractionated with a cross slope of 10" and a longitudinal slope
Malachite flotation - Froth Flotation Sulphide and Oxide
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NIOSHTIC-2 Publi ions Search - 10005669
Flotation separation of a chalcocite-pyrite mineral mixture by controlled potential was achieved using ethylxanthate, but the flotation behavior of the chalcocite and pyrite from the mixture does not follow the flotation behavior of the individual minerals. That is, the presence of another sulfide mineral alters the flotation behavior with
PDF Centenary of Flotation Symposium - nanoparticles.org
Richardson and Walker showed that the flotation of chalcocite, bornite, chalcopyrite and pyrite with potassium ethyl xanthate is controlled by the conditioning potential, similar to earlier findings by Heyes and Trahar. The active surface entities for chalcocite and bornite
Flotation Treatment of Supergene Complex Sulphide Ores at
Copper is present in the supergene ores mainly as chalcocite, digenite and covellite. Lead and zinc occur mainly as galena and sphalerite respectively. This paper describes the development of flotation plant practice, aided by laboratory testing, to process the supergene ores.
Minerals Engineering Conferences - Flotation '19
Flotation of fine particles using hydrophobized hollow glass microspheres S. Arriagada , C. Acu& 241;a and M. Vera Federico Santa Maria Technical University, Chile The interactions of thiol collectors with frothers on pyrite, quartz, and chalcocite
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