Chalcocite Flotation

The flotation of copper bearing minerals is always a hot topic in the field of minerals processing. In this paper, the adsorption of a flotation collector, 2-mercaptobenzothiazole(MBT), onto a typical secondary copper sulfide mineral, chalcocite, depending on electrochemical potential was investigated with the help of shell-isolated …

Most of the flotation tests were conducted using the freshly prepared chalcopyrite sample. However some tests were made using a chalcopyrite sample from the same deposit that was prepared four years prior to this study and stored in a dry atmosphere without precautions to prevent oxidation. ... poikilite, perkerite, chalcocite …

Chalcopyrite and chalcocite do not affect pyrite flotation in the same way in rougher flotation after primary grinding. This is because the galvanic interaction between minerals in both chalcocite–pyrite and chalcopyrite–pyrite systems is weak at coarse …

A high flotation recovery of 94.7% was obtained for the bornite treated at 0 wt% H 2 O 2.The treatment of bornite at 1 wt% H 2 O 2 led to a flotation recovery of 85.8%, which dramatically decreased to 6.15% at which bornite flotation reached a plateau, the recovery by entrainment, upon the treatment at 2 wt% H 2 O 2.A comparison with the …

Flotation separation of a chalcocite-pyrite mineral mixture by controlled potential was achieved using ethylxanthate, but the flotation behavior of 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 ethylxan­

The other key factor reported was the pH, which for values between 8 < pH < 11 produced strong chalcocite flotation. The electrochemistry of the chalcocite-xanthate system was investigated by O'Dell et al. (1986). This cyclic voltammetry work concluded that there was a chemisorbed product, ...

While the minerals in this study were not floated as mixtures, the ratio of recovery of bornite over chalcocite may provide some indication of possible conditions which would favour the preferential …

For the chalcocite flotation, a 45% maximum recovery in the electrochemical Denver cell is obtained between - 100 and + 100 mV vs. SCE, and this only for solutions containing 100 ppm KEtX. This is related to the presence of Cu-EtX species only as active com- pounds for flotation since from the SACV-results the formation of dixantho- gen on ...

Flotation recovery as a function of potential for chalcocite, chalcopyrite, and pyrite at pH = 9.2; [EX] = 1.44 × 10 −5 M for chalcocite and 2 × 10 −5 M for other sulphides (Ralston, 1991). In the presence of free cyanide, the surface potential of pyrite may be lower than the xanthate/dixanthogen equilibrium potential, thus inhibiting the ...

A flotation test was conducted using a Chilean copper ore that contained chalcocite, bornite, and chalcopyrite, and the flotation recovery of each mineral was consistent with the surface ...

Chalcopyrite or chalcocite recovery as a function of flotation time in the presence and absence of bentonite (a) and zeta potentials of the three minerals (b) …

The increased chalcocite flotation recovery with an increase in chalcocite oxidation found in this study could be explained by the formation of copper hydroxide (Cu(OH) 2) via initial surface oxidation as shown in Reaction (8) (Fullston et al., 1999).

High density conditioning in a slightly acid circuit, pH 6.0 to 6.5, with H2SO4, sodium fluoride, and oleic acid actuates the titanium minerals for rapid flotation. This computation effectively rejects the gangue minerals and any apatite. Flotation is in "Sub-A" Flotation Machines with 30-35% solids with fuel oil and a frother added as ...

Download scientific diagram | Chalcopyrite or chalcocite recovery as a function of flotation time in the presence and absence of bentonite (a) and zeta potentials of the three …

Flotation of chalcopyrite, galena, sphalerite, pyrite. Selective flotation. Pb-Zn bulk flotation. Sulphide minerals are floated by sulphydryl collectors (thio-componds) …

Abstract. A laboratory study of the batch flotation of chalcocite from chalcocite-quartz mixtures and of cuprite from cuprite-quartz mixtures with potassium ethyl xanthate as collector has shown that the oxidation-reduction state of the flotation pulp can have a pronounced influence on mineral floatabilities. At pH 11 chalcocite floated over a ...

The interaction between chalcocite and various flotation reagents can now be better analyzed since the oxidation and reduction process of the mineral have been delineated. A voltammogram of chalcocite in the presence of octyl hydroxamate is shown in Fig. 3. This voltammogram is characterized by a new peak (A2) at about 150 mV prior …

The flotation behaviors of chalcocite and molybdenite as a function of TGA dosage are indicated in Fig. 5. Recovery of chalcocite shows a substantially descending tendency with addition of TGA, while recovery of molybdenite is essentially constant with trivial decline. All this shows TGA is an effective inhibitor for chalcocite.

Equilibrium contact angle and flotation recovery of chalcocite in the presence of diethyl dithiophosphate at pH 9.2 have been determined as a function of potential, and the relationships compared ...

The flotation of copper bearing minerals is always a hot topic in the field of minerals processing. In this paper, the adsorption of a flotation collector, 2-mercaptobenzothiazole(MBT), onto a typical secondary copper sulfide mineral, chalcocite, depending on electrochemical potential was investigated with the help of shell-isolated …

The flotation of four copper sulfide minerals (chalcopyrite, chalcocite, bornite, covellite) and pyrite with xanthates shows that a minimum in the collector concentration necessary for flotation ...

The flotation of copper bearing minerals is always a hot topic in the field of minerals processing. In this paper, the adsorption of a flotation collector, 2-mercaptobenzothiazole(MBT), onto a typical secondary copper sulfide mineral, chalcocite, depending on electrochemical potential was investigated with the help of shell-isolated …

The electrochemical nature of mineral-collector interactions and their relationship to flotation have been investigated to develop a better understanding of the factors controlling sulfide mineral beneficiation. Spectrophotometric and electrochemical techniques have been used to examine the reactions occurring on electrodes composed of a bed of bornite …

In order to mitigate the negative effect of clay minerals (e.g., kaolinite) on copper-bearing minerals such as chalcocite flotation, …

Flotation results showed that the consumption of H 2 O 2 reagent could be reduced by the addition of FeSO 4 without losing the flotation selectivity. ... Meanwhile, Barzyk et al. (1981) reported that the floatability of chalcocite (Cu 2 S) decreased with increasing surface oxidation using oxygen. However, the oxidation phenomenon and …

The flotation practice and the previous studies have demonstrated that chalcocite flotation can be depressed by the slime coating of clay minerals (Peng and Zhao, 2011; Zhao and Peng, 2012). In this study, how kaolinite coats chalcocite surface and how electrolytes mitigate this coating were studied using electrochemical impedance …

Beneficiation of sulphide ores by flotation is ascribed to the natural electrochemical activity associated with sulphide minerals. Flotation is an electrochemical process comprising many interdependent conditions that are difficult to decouple in terms of controlling flotation performance. The extent of electrochemical activity is mineral …

In order to mitigate the negative effect of clay minerals (e.g., kaolinite) on copper-bearing minerals such as chalcocite flotation, Zhao and Peng investigated the effects of saline water. The results showed that chalcocite recovery was increased when the electrolyte concentration was increased, probably due to the reduced kaolinite …

Contrary to chalcopyrite flotation, chalcocite flotation as a function of the degree of surface oxidation was best described by a second-order polynomial function, as expressed by Eq. (2): (2) y = i n t e r c e p t + B 1 X + B 2 X 2. The parameters y a n d x represent chalcocite recovery and the degree of surface oxidation, respectively.

Flotation tests of pure and mixed minerals indicated that H2O2 treatment reduced the floatability of chalcocite and enargite by forming sulfate and copper hydroxide on their surfaces.

DOI: 10.1016/j.powtec.2023.119078 Corpus ID: 264398242; Effect of oxidation treatment on the selective separation of molybdenite from chalcocite using flotation @article{Berdakh2023EffectOO, title={Effect of oxidation treatment on the selective separation of molybdenite from chalcocite using flotation}, author={Daniyarov Berdakh …

The flotation results for chalcocite in 2 µM KAX indicate that the concentration of adsorbed xanthate was insufficient to reduce the oxidizing effect of H 2 …

The flotation of chalcopyrite and talc remained above 90% (pH = 2–12), but adding xanthan gum, the chalcopyrite depressed in acid conditions, recovering 10% at pH = 2. This effect disappears at pH = 8, returning to 90% recovery, even with xanthan gum. ... Chalcocite >14: Open in a separate window. Pyrite's flotation range is between pH 3 ...

The flotation of copper bearing minerals is always a hot topic in the field of minerals processing. In this paper, the adsorption of a flotation collector, 2-mercaptobenzothiazole(MBT), onto a typical secondary copper sulfide mineral, chalcocite, depending on electrochemical potential was investigated with the help of shell-isolated …

Flotation tests of pure and mixed minerals indicated that H2O2 treatment reduced the floatability of chalcocite and enargite by forming sulfate and copper hydroxide on their surfaces.