one kilogram of ore, at -200 mesh was used as feed to the bulk flotation that was conducted for 8 minutes. two collectors, independently added, were used at 3 different dosages: 20, 30, and 40 g/ton. the copper and zinc contents were determined as well
the recovery of these copper minerals by flotation or hydrometallurgy from ores, typically containing 0.5tcu (open pit mines) and 1-2tcu (underground mines) is of great commercial importance
according to the micro-flotation results, the collectorless flotation recoveries of oxidized pyrite after 5 min and 15 min of ultrasonic treatments were below 20 and similar at all ph values tested. with increasing sonication time, the flotation recovery of oxidized pyrite increased, depending on ultrasonic treatment time (up to 60 min sonication), and varied with ph.
water quality had no effect on the collectorless flotation of chalcopyrite which was very strong, in excess of 96 copper recovery, but all three lower quality waters had a detrimental effect on the recovery of bornite compared to that obtained in distilled water.
focusing often on the application of collectorless flotation. attention may be paid to a series of relevant reviews on the area [3-6]. below a brief survey is given on selected recent papers for different applications of flotation, from a really vast literature-showing well
the collectorless flotation of copper ions was also investigated. article metrics views 34 citations crossref 27 web of science 33 scopus 31 altmetric article metrics information disclaimer for citing articles more share options browse journals by subject arts
the collectorless flotations of chalcopyrite after various conditioning treatments are displayed in fig. 1.a good agreement is obtained between the experimental data and the data calculated using a first order rate equation with values of the parameters, flotation
however, flotation results (boulton et al., 2005) have shown that the amount of copper added to achieve maximum sphalerite flotation is very sensitive to solution conditions, with for example cu(ii) acting as an activator or depressant of sphalerite flotation
request pdf a potential application of collectorless flotation in a copper/gold operation a recent study found that chalcopyrite in the telfer ore could float without a collector
the flotation of sphalerite has been demonstrated without the use of collectors. the effect of redox potential, ph, and copper-activation have been investigated in tests using samples of pure mineral. it has been found that in general, collectorless flotation of sphalerite
the collectorless flotation recovery of pyrite is determined by the relative amounts of polysulfide, soluble species, and insoluble species produced during oxidation, which depends on solution ph and potential. keywords: chronoamperometry, collectorless 1.
collectorless flotation of different size fractions of sulphides and sulphur was conducted in a monobubble-type pyrite, galena and copper (i) sulphide floated as well, or almost as well, as
this study explores the flotation behavior of chalcopyrite in the presence of different concentrations of sodium sulfide (na2s9h2o) at ph 12 under controlled potential conditions. it was observed that the flotation of chalcopyrite is not depressed completely when the pulp potential is low, even at high concentrations of sodium sulfide, i.e., 101102 mol/l. however, a partial and
drzymala, j., bigosinski, j., 1995, collectorless flotation of sulfides occurring in the fore-sudetic copper minerals deposit of sw poland, mineralogia polonica, 26(1), 6373. drzymala j., milczarski e., milczarski j., 2007, adsorption and flotation of hydrophilic and hydrophobic materials in the presence of hydrocarbon polyethylene glycol ethers, colloid surf.
copper polysulfide is formed in air-saturated solutions. this finding provides an explanation for the collectorless flotation of copper-activated sphalerite. other investigators identified elemental sulfur, rather than the polysulfide, as the hydrophobic species
quantitative parameters for optimal condition of collectorless and usual flotation were elaborated for such copper minerals as sulfides, selenides, tellurides and copper sulphursalts, containing arsenic, arsenic and iron, antimony, silver or bismuth. optimal conditions
the change in collectorless flotation of sphalerite with ph and cu(ii) concentration was correlated with the type and proportion of species present on the sphalerite surface. the solution and surface species were determined using a combination of analytical techniques including zeta potential measurement and x-ray photoelectron spectroscopy.
influence of frother type and dose on collectorless flotation of copper-bearing shale 551 the results of flotation of investigated shale in the presence of frothers in the form of recovery of different particle size fractions and frother concentrations expressed in mg/dm3 versus
the kinetic curves for copper in the oxide flotation stage are shown in fig. 6-b. overall, a larger difference in performance between the collectors is observed in the oxide flotation stage. for the phosphorodithioate-mbt blend collector (df571), the recovery only increases with 10 in the oxide flotation stage, whereas for the dithiophosphate (df245) collector, the recovery increases with 20.
collectorless flotation of copper ions experiments were initially conducted with only copper ions in solution; sodium sulfide was used to precipitate a colloidal cus (artificial figure 1 illustrates the results obtained without any additional reagent.
flotation collectors. simply said; a flotation collectors is a chemical used to make the surface of minerals, which is metallic, hydrophobic or in laymans term afraid of water or water hating as others like to say. this chemical used will behaved, in a way, as a wax would when you applied it to your car. after wax (or hydrophobic
the plant-scale collectorless flotation of copper sulfide ore was carried out in 1989.the grade and recovery of copper concentrate were similar to those of collector-induced flotation.the collectorless flotation(clf)is divided into three types according to mineral structures
collectorless flotation of copper ions experiments were initially conducted with only copper ions in solution; sodium sulfide was used to precipitate a colloidal cus (artificial covellite). figure 1 illustrates the results obtained without any additional reagent. cu 5
in this flotation tests and evaluation for the best collector for copper oxide ore 911metallurgy continues with material thats 60 oxide copper. sample c: 1.7 copper about 60 oxide cu rougher tests: both reagents appear to behave similarly as the blue
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