The collectorless flotation process has been tested on six different chalcopyrite ores while monitoring the potentials (E h) of the pulp.The results show that collectorless flotation is effective only under oxidizing conditions.
An interesting approach to inhibiting the collectorless flotation of pyrite in gold flotation was adopted by Yoon et al. (1996). It was shown that pyrite rejection can be improved by galvanic coupling the pulp with active metals such as zinc, manganese, and aluminium.
A comparison of the flotation behavior of chalcopyrite at pH 8 with the flotation behavior of enargite at pH 8 (refer Figure 1) shows that there is a possible window of separation in the potential range
Oxidation and collector adsorption in sulfide mineral flotation 555 highly variable, and the presence of small, oxidized particles and particle interactions must be considered.
Effects of galvanic interaction on collectorless flotation behaviour of chalcopyrite and pyrite Ekmekçi, Z.; Demirel, H. 1997-11-01 00:00:00 The effect of galvanic interactions between chalcopyrite and pyrite on their collectorless flotation behaviour have been studied. Cyclic voltammetry and microflotation tests were carried out to identify the reaction products and flotation behaviour of sulphide minerals after different
In other words, the self-induced collectorless flotation of chalcopyrite and galena was depressed by the addition of sulfide. Alternatively, the recovery of pyrite was evidently increased when the concentration of Na 2 S added was above 2 × 10 4 at pH 11, showing strong Na 2 S induced collectorless floatability.
Pyrite recovery was sharply increased by the addition of sodium sulfide in light of sodium sulfide-induced collectorless flotation; however, it showed a very weak effect on chalcopyrite floatability. In addition, the highest and lowest chalcopyrite and pyrite recoveries were, respectively, identified when d75 equaled to
Jul 24, 2018· collectorless flotation of chalcopyrite and . The flotation of chalcopyrite and sphalerite from copper and copper zinc ores has . *Present address:
The recovery of chalcopyrite in the collectorless flotation is above 70% at the pH range studied, while the recovery of talc was about 90% across the entire pH range. The flotation performance of chalcopyrite and talc due to the electrochemical reaction occurs on chalcopyrite surface (Bailey and Peters, 1976), and natural hydrophobicity on talc
rhotite and also in some cases chalcopyrite during Sotation. A clean and satisfactory separation of Figure 1 Effect of pH on collectorless flotation recoveries on Enonkoski noritic ore after grinding in steel mill. (Reprinted from Heiskanen et al.(1991) with permission from Elsevier Science.) III/NICKEL AND COBALT ORES: FLOTATION 3493.
Chalcopyrite recovery was marginally improved from the collectorless flotation case while bornite experienced vastly improved recoveries in the presence of a
The collectorless flotation of chalcopyrite ores using sodium sulfide. Int. J. Miner. Process., 13: 271--283. The collectorless flotation process has been tested on six different chalcopyrite ores while monitoring the potentials (Eh) of the pulp. The results show that collectorless flotation is
Collectorless flotation of lead And zinc sulphidefrom Dereköy ore deposite 201 201 COLLECTORLESS FLOTATION EXPERIMENTS Sodium Sulphide Sodium sulphide (Na2S 9H2O) was used to clean the surface oxides of sulphide minerals as sulphidising agent.
Introduction. Different sulphide ores respond differently in the prospect of copper activation to thiols for froth flotation. With the BCL Selebi-Phikwe ore body, pentlanditepyrrhotitechalcopyrite co-occur and there is the constraint of fine pentlandite dissemination in the pyrrhotite, so that liberation is limited.
Two micro-flotation test studies on closely sized fractions examined the collectorless flotation of millerite. one in acidic conditions and one in alkaline conditions. In acidic conditions (pH 2) millerite was found to float strongly without collector but in alkaline conditions (pH 7.5-7.8) the recovery of millerite without collector was found
Experimental results showed that in collectorless flotation, the law of change in the flotation rate constant (k) of the two minerals over time is independent of pH, and k values of chalcopyrite
Simulation results indicated that the collectorless flotation of chalcopyrite conform to the classical first-order kinetics model and the Kelsall model, whereas that of talc only conform to the latter, which is due to the layered structure of talc.
The process water used for the flotation of sedimentary copper ore in ore concentration plants in KGHM Polska flotation from the Lubin mine area was described. The results of .. Mechanobr type flotation machine with 1 dm3 cell volume.
COLLECTOR ADDED FLOTATION EXPERIMENTS To see the flotation characteristics of the ore, experiments were initiated with collector addition. A comparison of the results obtained with collector addition and without collector will helps to measure the success of idea of collectorless flotation of the lead and zinc minerals in the ore.
The collectorless flotation of chalcopyrite increases up to an E h value of approximately 250 mV (Fornasiero et al., 1996) but excessive oxidation has a depressing effect (Rao et al., 1992). Smart (1991) has identified oxidation products on sulfide mineral surfaces by surface analysis.
The sequence of floatable extent of sulfide minerals in the collectorless flotation is as follows: chalcopyrite, galena, pyrrhotite, covellite, poikilite, sphalerite, pyrite and arsenopyrite. The influence factors lie in the grinding condition, pH value of flotation and the pulp potential.
In collectorless flotation, all K ¯ values of chalcopyrite are lower than those of talc, but in the presence of collector, all K ¯ values of chalcopyrite are considerably higher than those of talc. According to the examination of AFM and FTIR, the reason is that interactions of PBX with talc and chalcopyrite are physisorption and chemisorption, respectively.
COLLECTORLESS FLOTATION OF Science Direct. The selectivity of chalcopyrite flotation was found to improve significantly when the pH of the pulp was lowered after sulfidization. In one experiment. Investigation of Flotation Parameters for Copper Recovery from .
Chalcopyrite recovery was marginally improved from the collectorless flotation case while bornite experienced vastly improved recoveries in the presence of a collector to surpass the recovery of chalcopyrite.
Pyrite recovery was sharply increased by the addition of sodium sulfide in light of sodium sulfide-induced collectorless flotation; however, it showed a very weak effect on chalcopyrite floatability. In addition, the highest and lowest chalcopyrite and pyrite recoveries were, respectively, identified when d
The effect of water quality on the collectorless flotation of chalcopyrite and bornite. In: Water in Mining 2012: 3rd International Congress on Water Management in the Mining Industry; 6
Experimental results showed that in collectorless flotation, the law of change in the flotation rate constant (k) of the two minerals over time is independent of pH, and
collectorless flotation. Furthermore, this oxidation phenomenon adds an electro-chemical dimension to the understanding of sulphide mineral flotation. and whether the region results in an increased flotation recovery of chalcopyrite (Suoninen and Laajalehto, 1993). It
Electrochemical study of surface oxidation and collectorless flotation of arsenopyrite X.-H. WANG* than that of pyrite and chalcopyrite, but higher than that of the other sulphides. Vreudge . Beattie and Poling  studied arsenopyrite oxidation by using cyclic voltammetry and ESCA spectroscopy.
JME Journal of Mining & Environment, Vol.3, No.2, 2012, 99-102. Collectorless flotation of chalcocite by controlling redox potential the collectorless flotation of chalcopyrite is possible in an oxidizing environment [4, 5]. Luttrell and Yoon, Shuiyu, Lekki and Drzymala,
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