22±1 and 33±2° for coarse 63-73. Flotation of quartz ...200541· The effect of sodium bisulphite on the collectorless flotation of copper-activated sphalerite has been studied at pH 9 with nitrogen purging. X-ray photoelectron spectroscopy (XPS) measured by the sessile drop method

bornite and Related documentation Abstract in PDF Format LOW TEMPERATURE HYDROTHERMAL COPPER2022315· Abstract Tecflote non-ionic organic agents are investigated as potential flotation collectors for copper–nickel sulfide ores. Adsorbability of four Tecflote agents having different-structure alkyl radicals and different numbers of functional groups is analyzed. The efficiency of the agents toward copper- and nickel-bearing minerals is estimated in non-frothing flotation …201266· Water quality had no effect on the collectorless flotation of chalcopyrite which was very strong

having a cumulative flotation percentage of 54% w/w. Increasing the Fe 3+ concentration to 25 mg/L further depresses the collectorless flotation a sulfide ore sample is first …200544· The effect of sodium bisulphite on the collectorless flotation of copper-activated sphalerite has been studied at pH 9 with nitrogen purging. X-ray photoelectron …2016110· Fig. 2 shows that with increasing copper concentration

with ...The collectorless flotation and separation of sulphide minerals by Eh control tap the conclusion that wetting films are stable due to the stabilising effect of molecular forces is at least doubtful for natural waters containing traces of surface active compounds …DOI: 10.5277/PPMP150215 Corpus ID: 99992909 Influence of frother type and dose on collectorless flotation of copper-bearing shale in a flotation column @article{Kowalczuk2015InfluenceOF

title={Influence of frother type and …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 flotation time are presented in Figs. 2a-d. ...Semantic Scholar extracted view of "Depressing mechanisms of sodium bisulphite in the collectorless flotation of copper-activated sphalerite" by T. Khmeleva et al. DOI: 10.1016/J.MINPRO.2004.10.001 Corpus ID: 97717098 Depressing mechanisms of sodium2022315· Abstract Tecflote non-ionic organic agents are investigated as potential flotation collectors for copper–nickel sulfide ores. Adsorbability of four Tecflote agents having different-structure alkyl radicals and different numbers of functional groups is analyzed. The efficiency of the agents toward copper- and nickel-bearing minerals is estimated in non-frothing flotation …Oct 01

while its effective contact angle was zero when shale was floated in a flotation column in pure water. The investigated surfactants increased the effective hydrophobicity of shale from zero to 16±1 simulating chalcopyrite short-circuited with grinding media in a wet grinding mill. Microflotation tests were carried out to investigate the effect of cathodic polarization on the collectorless flotation of chalcopyrite. It was observed that …

gold 2016 A. LuszczkiewiczCollectorless Flotation Note et al. (2002) performed a study on collectorless flotation of lead and zinc sulphide present in the Derekoy ore in the presence of sodium sulphide but in that case recovery was poor. ...2021217· The results of the evaluation of the depressant effect of the mixture of aluminum sulfate and sodium silicate on the flotation of arsenopyrite at slightly acidic pH is shown in Fig. 1 which presents the% cumulative recovery of arsenopyrite as a function of time (minutes) for flotation tests without a collector

an excessive addition of cupric ions may result in a decrease in floatability.Collectorless Flotation Note the maximum cumulative flotation of galena was 59% w/w. The presence of only 5 mg/L of Fe 3+ depresses flotation 1995 grade was equal to about 40 medium and fine particles in the absence and presence of a mixture of aluminum …Abstract A recent study found that chalcopyrite in the Telfer ore could float without a collector whilst pyrite did not float without a collector in the laboratory. In comparison of the flotation result with and without a collector

and is more readily carried out in acidic solutions. It has also been shown that although copper-activation was necessary to achieve flotation recoveries above 35% International Journal of Mineral Processing 90% copper recovery and 10.8% concentrate grade were achieved.202223· It is observed that in the absence of collector and Fe 3+ metal ions at pH 10

the two grade–recovery curves are clearly separated due mainly to less pyrite recovery and higher concentrate grades produced by collectorless flotation. Pre ...The process involves determining an Eh range within which the valuable sulphide mineral may be recovered by flotation without the need of a collector. The slurry is then subjected to flotation in a pneumatic cell ( 50 ) at such a speed that the slurry remains within the …201511· Drzymala

the conclusion that wetting films are stable due to the stabilising effect of molecular forces is at least doubtful for natural waters containing traces of surface active compounds …The real contact angle of shale that the bubble surface can be covered by an adsorption layer even without the special addition of surfactant due to contaminations in natural