The micro-flotation experiments and zeta potential measurements showed that combined depressant consisting of PAAS and GA could efficiently reduce the …
The study of Fairthorne et al. indicated that the flotation of chalcopyrite and pyrite at pH 7 increased with the concentration of O-isobutyl-Nethoxycarbonyl thionocarbamate (IBECTC) and that the flotation rate was faster for chalcopyrite.
Based on the flotation results, the effect of pyrite proportion on chalcopyrite flotation behaviour can be concluded as two trends: (i) a decrease in Cu recovery …
SMA is proposed as a high performance pyrite depressant in the flotation of chalcopyrite and pyrite for the first time. In this work, the flotation performance and selective adsorption mechanism of single and mixed minerals are discussed by means of micro-flotation test, FTIR and adsorption test, LEIS measurement, ToF-SIMS test and …
Flotation tests showed that chalcopyrite flotation rate, recovery and grade, as well as the pulp oxidation potential, decreased with increasing pyrite content whilst pyrite recovery increased.
In a chalcopyrite and pyrite flotation system, the effect and mechanism of organic depressant sodium dimethyl dithiocarbamate on the hydrophobicity of chalcopyrite and pyrite were studied.
Microflotation results indicated that MDPE exhibited surpassing flotation selectivity for chalcopyrite against pyrite at low alkalinity (pH = 8.5) compared with …
The results of flotation and adsorption experiments, as well as zeta potential testing, revealed that TA can selectively adsorb on the talc surface to separate chalcopyrite and talc. The chalcopyrite exhibits self-induced flotation behavior, and its hydrophobicity is caused by anodic oxidation of the surface (mineral surface oxidation as ...
First test Second test Kinetics model Chalcopyrite Pyrite Chalcopyrite Pyrite Classical first order 36.76 18.41 12.22 40.20 Flotation modeling Kelsall 36.46 16.57 12.08 40.20 Agar 36.16 14.44 11.93 29.43 Several flotation …
Test samples were carefully selected, crushed, ground in an agate mortar, and sieved to obtain pure minerals with a particle size of -74 + 38 μm for flotation experiments. Then, the test sample was ground to -2 μm for further test, pure mineral samples were dried in a vacuum dryer at 35 °C to prevent oxidation, and stored in a …
It made sure that the flotation was not influenced by the big particle size. As the particle size at the range of 20–80 μm is best for chalcopyrite flotation [12]. Download : Download high-res image (170KB) Download : Download full-size image; Fig. 6. The particle size distribution and cumulative distribution of the grinding product.
Chalcopyrite flotation. XPS. Introduction. Wet ball milling prior to flotation is generally employed in beneficiation plants of copper sulfide ores. The grinding process …
For single mineral flotation test, 2 g of chalcopyrite or molybdenite samples were dispersed by ultrasonic cleaner for 3 min, then the suspension was transferred in to 60 ml flotation cell and the suspension was mixed for 2 min, followed by the sequential addition of a desired amount of sodium thiosulfate (Na 2 S 2 O 3) and cupric (Cu 2+) with ...
A plane-wave cutoff energy of 400 eV was utilized by testing. The chalcopyrite crystal structure was modeled based on data sourced from the american mineralogist crystal structure database. Iron (Fe) ... resulting in higher chalcopyrite flotation recovery. In addition, the p orbitals of S atom in TBOEX participate in the …
The flotation experiments show that PBAHX has a superior recovery ratio for chalcopyrite (91.89%), but a poor flotation performance on pyrite (34.62%) at a collector concentration of 2 × 10 −4 mol/L and pH 9.0. Further, E-nose detection demonstrates that PBAHX has a lower odor intensity than SIBX, which is attributed to the chaotic ...
Accordingly, chalcopyrite flotation was selectively depressed. 3.3 XPS analysis The XPS analysis was used to investigate the chemical state variation on the mineral surfaces. Here, XPS analysis was used to further investigate the selective depression mechanism of TLA in the flotation separation of chalcopyrite and …
The flotation test of the cyanide tailings was performed using a suspended flotation cell (XFDIV 1.0, Jilin Exploration Machinery Plant Co., Ltd., China). The pulp density was 30%, and the ...
This paper proposes a novel starch-modified reagent, Hydroxypropyl distarch phosphate (HDP), for the separation of chalcopyrite and talc. Micro-flotation test results indicate that HDP has a significant inhibitory effect on talc, while the flotation recovery of chalcopyrite is almost unaffected. Effective separation of chalcopyrite and …
It depresses talc in the flotation system, thereby improving the flotation index of chalcopyrite. The flotation test results showed that under the action of an 80 mg/L depressant, a chalcopyrite concentrate with Cu grade of 28.87 % and Cu recovery rate of 86.72 % was obtained, indicating efficient separation ability of chalcopyrite-talc.
Chalcopyrite and galena samples were obtained from Guangdong Province, China. The high-purity lump ore was crushed, grinded and screened to obtain − 149 + 37 µm particle size for flotation test, and − 37 µm particle size for X-ray diffraction (XRD) analysis, FTIR spectrum, single-channel ICP and XPS test.
The recoveries of the chalcopyrite in flotation under various conditions, unoxidised, oxidised and sulphidised, are presented in Fig. 1.The unoxidised chalcopyrite (data included for comparison) yielded a high final flotation recovery of 89.3%, which rapidly dropped to entrainment recovery, 5.95%, following chemical oxidation of the …
The mechanism of electrochemical interaction between chalcopyrite and hexagonal pyrrhotite was analyzed via electrochemical interaction, copper ion concentration testing, and X-ray photoelectron spectroscopy (XPS) characterization. Besides, the effect of electrochemical interaction between the two minerals on the flotation separation was …
In this work, we applied the technology of magnetic treatment to the flotation of chalcopyrite. The mechanism of the effect of pre-magnetized butyl xanthate on chalcopyrite flotation was studied using …
Clay minerals are known to negatively affect sulfur flotation. In the present study, the effect of clay minerals (kaolinite-montmorillonite) on chalcopyrite flotation was investigated and it was aimed to propose solutions to eliminate the negative effects. In the experimental studies, ζ-potential measurements and flotation experiments were carried …
The collector-chalcopyrite system in Fig. 4 shows similarly high recoveries of chalcopyrite across the water types; ranging from 84.42% in 1 SPW to 88.80% in 10 SPW. A trend of increases in chalcopyrite recovery with increasing ionic strength is however observed even for a system with no collector.
In this study, the flotation behaviors of chalcopyrite and galena were studied through flotation tests, adsorption measurements, solution chemistry …
In test TA-3 of the present work, for example, approximately 8 X 10-4 moles/1 of Na2S (at 0.25 kg/ton) was used 47 for the flotation of chalcopyrite. In conventional flotation, on the other hand, the concentration of Na:S required to suppress the flotation of chalcopyrite was reported to be as low as 9 X 10-6 moles/1 when 1.56 10-4 moles/1 of ...
The flotation experiments were conducted using a hanging cell flotation machine (XFGC-80) at room temperature. Before each flotation test, 2 g of chalcopyrite was weighed using an electronic balance and placed in a beaker. Deionized water (30 mL) was added to the beaker, which was then placed in an ultrasonic oscillator for 3 min.
Micro-flotation results indicated that a significant improvement of chalcopyrite flotation recovery of 92.43% was achieved when mixed IPETC/BEAT collectors ... The conditions and results of the bench-scale flotation test are shown in Table 3. The results in Table 3 indicated that by using 30 g/t IPETC + 36 g/t MIBC, the Cu …
The flotation test results indicated that chalcopyrite and molybdenite had high recoveries of more than 90% and 80%, respectively, in the tested pH range of 4–12; thus, it would be considerably difficult to separate chalcopyrite from molybdenite without a flotation depressant.
Flotation test results showed that H2O2 treatment influenced the flotation behaviors of the two minerals; however, flotation of pyrite was depressed more significantly than that of the chalcopyrite. Under well-controlled H2O2 concn., the selective sepn. of chalcopyrite from pyrite was realized at pH 9.0, at which the recovery of chalcopyrite ...
Sulphur 42.38%. Zinc 12.45%. Gold 0.01 oz/ton. Iron 32.84%. Silver 1.50 oz/ton. Insoluble 8.50%. In order to meet smelter requirements it is desired to produce at least a 20% copper concentrate with not over 8% zinc. The copper is present principally as chalcopyrite in extremely close association with both the sphalerite and pyrite.
