Apr 01, 2014· Flotation of chalcopyrite and chalcocite. Before studying the separation of chalcopyrite and chalcocite from pyrite, the floatability of single copper minerals in the absence of pyrite was investigated. In order to simulate normal flotation circuits in plants, in this study, chalcopyrite and chalcocite recovery were maximized in rougher ...
Mar 22, 2016· In this study, a series of batch flotation experiments was conducted to evaluate both the role of particle size distribution and the presence of sodium metabisulfite Na 2 S 2 O 5 (SMBS) in chalcopyrite and pyrite flotation. Kinetic flotation tests were also carried out in order to evaluate the kinetics behavior of the above-mentioned minerals.
Chalcopyrite (CuFeS 2) is the major sulphide mineral for Cu extraction, containing about 70 % of total copper reserves globally within all types of copper bearing ore in mineral processing [,, ].The chalcopyrite has to be enriched by flotation, otherwise smelting would not be applicable.
Coarse chalcopyrite recovery in a universal froth flotation machine. Graeme J. Jameson, Cagri Emer. ABSTRACT. A new froth flotation machine has been developed, known as the NovaCell, which can recover mineral particles over a wide particle size range, from the lower limit of flotation, to an upper limit which depends on the liberation ...
The flotation results showed that sodium alginate could simultaneously depress the flotation of chlorite and serpentine effectively, but seldom influenced the floatability of chalcopyrite at pH 9. In the ternary mixture flotation, a concentrate with a Cu grade of 31% could be achieved at Cu recovery of 90%.
Ore Concentration by Froth Flotation. Remember that only 0.67% of the ore is copper. The copper minerals and waste rock are separated at the mill using froth flotation. ... Raising the pH causes the polar end to ionize more and to preferentially stick to chalcopyrite (CuFeS 2) and leave the pyrite (FeS 2) alone. Air is blown into the tanks and ...
In this study, effects of the collector added before grinding and after grinding on the subsequent flotation and mineral surface properties were investigated. The pH was controlled at 10 during the grinding and flotation processes opened to the atmosphere. With enough amounts of sodium butyl xanthate addition, adding the collector before grinding recovered more chalcopyrite than adding it ...
Aug 11, 2020· An investigation on the surface properties and collector adsorption was conducted after the galvanic interaction of chalcopyrite and pyrite in the flo…
flotation tailings and can be readily recovered by flotation with different flotation reagents. When amyl xanthate is used, 85% of chalcopyrite can be recovered with a copper grade of 14.5% in a single-stage froth flotation. The chalcopyrite flotation concentrate can be sent back to chloride leaching circuits.
Sodium thioglycolate is a chalcopyrite depressant, but its depressant effect is weak. The paper investigated the effect of CuSO4 on the depressant performance of sodium thioglycolate towards chalcopyrite through flotation tests, Zeta potential measurements, X-ray photoelectron spectroscopy (XPS) analyses and Fourier-transform infrared (FTIR) spectra measurements.
Coarse chalcopyrite recovery in a universal froth flotation machine Graeme J. Jameson, Cagri Emer ABSTRACT A new froth flotation machine has been developed, known as the NovaCell, which can recover mineral particles over a wide particle size range, from the lower limit of flotation, to an upper limit which depends on the liberation ...
In the absence of the flotation reagents, the pyrite particles were highly positively charged over a wide pH range from 4 to 6 with an isoelectric point (IEP) at pH 6.8, while the chalcopyrite ...
The flotation results showed that sodium alginate could simultaneously depress the flotation of chlorite and serpentine effectively, but seldom influenced the floatability of chalcopyrite at pH 9. In the ternary mixture flotation, a concentrate with a Cu grade of 31% could be achieved at Cu recovery of 90%.
Flotation Experiments All chalcopyrite flotation tests were conducted using a hanging trough-type flotation machine (XFGII5–35g, Wuhan Exploration Machinery Factory, Wuhan, China) at 1200 rpm with an airflow rate of 80 mL min 1. Chalcopyrite powder (2 …
Flotation was then carried out using nitrogen gas. As a result, a low Cu/S ratio concentrate (1.3) and a high Cu/S ratio (>1.6) tailing stream were produced. QEMSCAN analysis of the flotation products showed that more than 85 per cent of the chalcopyrite and …
The prior addition of PGA achieved an improved selective flotation of chalcopyrite from pyrrhotite at pH 8, at which the grade and recovery of chalcopyrite in concentrate were over 80%. Surface ...
ery of chalcopyrite. As can be seen in Figure 6,flotation of chalcopyrite was observed above about +100 mVand non-flotation below about-100 mV. Similar correlations be-tween potential and flotation or contact angle have also been reported by Gardner and Woods (25) and Chander and Fuerstenau 26) .
The chalcopyrite and talc minerals used in the experiments were taken from copper ore deposits of the Donggua Mountain in China. In order to conduct the experiments of the flotation kinetics, the chalcopyrite and talc samples in large bulk were first comminuted in a jaw crusher, subsequently ground in a ceramic mill, and then sieved into 5–38 μm size fraction.
Abstract Separating chalcopyrite, an important copper-containing ore, from pyrite is an important mineral-processing objective. Herein, we report the synthesis of S-hydroxyethyl-O-isobutyl xanthate (HEIBX), a novel surfactant bearing both hydroxyl and thione groups, through the attachment of a hydroxyethyl group to sodium isobutyl xanthate (SIBX), and its first application as a flotation ...
The chalcopyrite and talc minerals used in the experiments were taken from copper ore deposits of the Donggua Mountain in China. In order to conduct the experiments of the flotation kinetics, the chalcopyrite and talc samples in large bulk were first comminuted in a jaw crusher, subsequently ground in a ceramic mill, and then sieved into 5–38 μm size fraction.
Flotation Experiments All chalcopyrite flotation tests were conducted using a hanging trough-type flotation machine (XFGII5–35g, Wuhan Exploration Machinery Factory, Wuhan, China) at 1200 rpm with an airflow rate of 80 mL min 1. Chalcopyrite powder (2 …
Abstract Separating chalcopyrite, an important copper-containing ore, from pyrite is an important mineral-processing objective. Herein, we report the synthesis of S-hydroxyethyl-O-isobutyl xanthate (HEIBX), a novel surfactant bearing both hydroxyl and thione groups, through the attachment of a hydroxyethyl group to sodium isobutyl xanthate (SIBX), and its first application as a flotation ...
Leaching of the chalcopyrite ore had little effect on its floatability, as indicated by rougher flotation testing. The maximum flotation recoveries, RMAX, were 90% and 88% for the ore and leached ...
The results of chalcopyrite and molybdenite flotation and OM adsorption (Figure 5 and XPS study) on these two minerals indicate that, first, OM adsorption is the cause of the depression of mineral flotation in agreement with similar observations that the adsorption of hydrophilic macromolecules such as humic acid, lignosulfonate, guar gum or ...
