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3.1.3 Flotation of chalcopyrite and galena with APS as depressant Sodium persulfate is often used as a strong oxidant. In the separation of copperlead minerals by flotation, APS can be used as the depressant of galena. The effects of APS on the recovery rates of chalcopyrite and galena at pulp pH6.5 were determined see Fig. 5. The results
According to the existing or previous kinetic investigations for kinetic flotation Clasical kinetic model for different sulphide minerals, the above mentioned models and constant k for copper mineral will have the following equation chalcopyrite I Io 1-e-kt 89.25 1 e- 1.025xt According to the existing or previous kinetic ...
Jun 26, 2020 Part of large-scale industrial test results of milling fineness influence on lead, copper and zinc minerals flotation results in the Rudnik flotation plant are shown in this paper. Based on industrial research it has been concluded that one-stage milling and two-stage classification of complex Pb-Zn-Cu ore leads to so-called differential milling. Namely, galena has much faster ...
Mar 17, 2011 Collectorless flotation of chalcopyrite observed under oxidizing conditions using air is thought to be prevalent even in the presence of a collector obscuring the selectivity of the process. Leaching of the mixtures of bornite and chalcopyrite at mass ratios of 11, 13 and 31 are
flotation were determined to achieve the maximum grade and recovery of chalcopyrite and the effect of activated pyrite on the chalcopyrite flotation efficiency was investigated. 2. Materials and methods The experiments were performed on copper ore obtained from Sarcheshmeh Copper mine, Kerman, Iran.
Chalcopyrite Chalcopyrite otation was mainly independent of pH and xanthate type Figure 5. Flotation of chal-copyrite from pH 2 to 13 is explained by electro-chemical oxidation of xanthate to dixanthogen as well as by chemisorption of xanthate on chalcopy-rite Weiss 1985. Gardner and Woods 1979 pro-
Aug 24, 2021 Thus, in the flotation separation of chalcopyrite and galena, the choice of galena depressants is of vital importance for their successful separation. As known, dichromate is one traditional inorganic depressant and widely used to depress galena in the flotation separation from chalcopyrite for many years 10 , 11 , 12 .
Bismuth Depression Chalcopyrite Flotation Pionera F-200 shows reduced bismuth recovery in copper flotation compared with cyanide. Read more All You Need to Know About Mineral Processing Mineral processing is the art and technology of treating ores from the mining areas in order to separate the valuable minerals from the waste rock. ...
Jun 06, 2012 A further series of flotation tests has been undertaken on chalcopyritequartz and bornitequartz mixtures to investigate the effect of increasing salinity by comparing the flotability in distilled water, brackish water, sea water and hypersaline water.
Dec 06, 2015 Copper Chalcopyrite and others As Lime is added and rises pH towards 12, depressed again is Iron pyrite, followed by Zinc. Activated Zinc, in the Cu andor Pb Circuit, will float like Copper. More on SEQUENTIAL FLOTATION OF SULFIDE ORES
The chalcopyrite s ample was subjected to flotation tests in order to investigate the effect of Na 2 S 2 O 5 on the flotation recovery. The dosages of Na 2 S 2 O 5 were chosen as 500, 1000, 2500
Oct 20, 2013 This study explores the flotation behavior of chalcopyrite in the presence of different concentrations of sodium sulfide Na 2 S 9H 2 O 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., 10 sup 1 sup 10 sup 2 sup molL.
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 ...
Selective flotation of chalcopyrite from pyrite is possible at pH10 and is impossible at pH4. Recovery of the selective flotation for chalcopyrite with TC is significantly higher than with DTP.Electrophoretic light scattering is a useful technique to study heterocoagulation, non-coagulation interactions and to diagnose flotation selectivity ...
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.
the influence of particle size and surface hydrophobicity on flotation rates of chalcopyrite. It. was shown that for each size fraction tested 20300 m there is a critical contact angle.
Keywords talc, chalcopyrite, flotation, separation, carboxymethyl chitosan Introduction Talc is a common gangue of copper-nickel sulde ores around the world. Talc easily floats into a concentrate because of its surface hydrophobicity Shortridge et al., 2000 Beattie et al., 2006. The Dongguashan copper mine is located in Tongling city, China.
May 03, 2017 Sodium silicate was somewhat effective in causing a differential or selective flotation of copper, as chalcopyrite from pyrite by keeping pyrite from floating. Sodium hydroxide and sodium sulfide gave, in most cases, a distinct separation of sphalerite from chalcopyrite i.e., a high copper and low zinc by suppressing the flotation of sphalerite.
The flotation reagent consumptions are minimum. The majority of chalcopyrite remains in the sulfur 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.
May 10, 2020 adsorption on chalcopyrite surface and, the refore, chalcopyrite flotation. The te sted temperatures are specifically selected from 25 C to 65 C becaus e of the potential h igh temperature ...
The flotation of chalcocite, bornite, chalcopyrite, and pyrite has been studied in a microflotation cell in which the potential of a bed of the mineral particles could be controlled electromechanically. The ethylxanthate-induced flotation of each mineral is markedly dependent on electrochemical potential, with the recovery changing from 0 to 100 pct in potential intervals of - 0.2 V.
The chalcopyrite sample used in all the experiments was obtained from Chitradurga Copper Mines Karnataka, India. It was subjected to a series of concentration procedures such as froth flotation, heavy media separation and isodynamic separation and only the
Copper and lead are two important and widely used metals in industry. Chalcopyrite CuFeS2 is associated with galena PbS in ore, and it has been a research hotspot in separating galena from chalcopyrite by flotation. In this study, the flotation behaviors of chalcopyrite and galena were studied through flotation tests, adsorption measurements, solution chemistry calculation, Fourier ...
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 538 m size fraction.
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 ...
Aug 01, 2021 In contrast, as TG dosage increased, chalcopyrite flotation recovery decreased gradually and it was less than 20 when 100 mgL TG was added. Therefore, TG was a potential effective depressant to realize the molybdenite-chalcopyrite flotation separation. Download Download high-res image 140KB Download Download full-size image Fig. 6.
Nov 27, 2020 The flotation recovery of chalcopyrite and arsenopyrite in concentrate and tailings after flotation of mixed minerals are shown in Table 2. It can be seen from Table 2 that the flotation recovery of chalcopyrite in concentrate products is about 71, while the flotation recovery of arsenopyrite is less than 29. Compared with the results of ...
Jul 08, 2020 To improve the collision efficiency and flotation kinetics, agglomeration using the emulsified oil of finely ground chalcopyrite D50 3.5 m was carried out before flotation.
Feb 01, 2021 Chalcopyrite is a widely distributed copper-iron sulfide mineral, often containing trace amounts of gold, silver and other minerals, and is the main copper-containing mineral. With the deepening of mining, low grade polymetallic refractory chalcopyrite has become an important source of copper ore. Now, lets know the common chalcopyrite flotation processes together.
Apr 03, 2018 Flotation of ultrafine chalcopyrite can be improved by processing the ore with 1 split-circuit design and 2 intense agitation conditioning before flotation. At equivalent or even lower collector consumption, a split circuit flotation design, treating the plus 38- and minus 38- m-size ore individually, recovered 93 pct of the copper in a 28.7-pct-copper concentrate.
Oct 04, 2018 Perhaps the strongest evidence for elemental sulfur being present on the chalcopyrite surface and playing a decisive role in its collectorless flotation has been given by the UV analysis. The samples conditioned at oxidizing potentials showed a large amount of elemental sulfur, while those conditioned at reducing potentials showed a significantly smaller amount.
Mar 18, 2021 The micro-flotation experiments and zeta potential measurements showed that combined depressant consisting of PAAS and GA could efficiently reduce the recoveries of mixed minerals of serpentine and...
Apr 14, 2016 Even at this grind microscopic examination shows inclusions of chalcopyrite in sphalerite grains. Zinc sulphate and cyanide are added to the regrind mill to effectively depress the sphalerite. Xanthate Z-11 or reagent Z-200 is added to the conditioner to promote the chalcopyrite and float it in the Sub-A circuit as shown.
Jul 31, 2019 The presence of chalcopyrite increased the depression effect of biopolymers on the flotation of copper-activated pyrite due to enhanced oxidation
Jan 01, 2017 The flotation results showed that both oxidation treatments exhibited a detrimental effect on the floatability of chalcopyrite. However, ozone reduced the floatability of molybdenite, whereas the H 2 O 2 solution slightly reduced the floatability of molybdenite at low concentrations and exhibited no significant effects on the floatability of molybdenite at high concentrations.