Therefore, flotation tests were performed on a mimicked siliceous-chalcopyrite synthetic mixture for Mpanda Mineral Field from Tanzania using polyethylene oxide as a chalcopyrite depressant. Flotation tests of quartz and chalcopyrite using 60 g/t of octadecan-1-amine and potassium amyl xanthate, respectively at 100 g/t and 500 …
First, flotation experiments were performed to investigate the inhibitory effect of starch on pyrite and chalcopyrite flotation. Fig. 10 shows flotation recovery of pyrite and chalcopyrite in the presence of starch as a depressant added before the collector (SBX). The tests were conducted at different solution pH and different starch …
The screen or design of more selective depressants and collectors is the key to efficient separation. ... −19.45 kcal/mol, referring to an exothermic reaction. As a result, IBATC showed great capacity for the separation flotation of chalcopyrite, pyrite and sphalerite. Flotation behavior and surface analytical study of synthesized (octylthio ...
To investigate the selectivity of HDBP, the micro-flotation tests of single mineral samples were carried out. The effects of HDBP concentration on the recoveries of chalcopyrite, galena and pyrite are compared in Fig. 2 a (pulp pH = 7; [terpineol] = 2.5 × 10 −6 mol/L). Across the entire concentration range of this study (from 0 to 2 × 10 −4 …
Magnetite pellet feed recovery from chalcopyrite dam copper flotation tailings. Process route comprises scalping screen, low field rougher, and cleaner magnetic separations and silicates reverse cationic flotation as recleaner step. High-quality magnetite pellet feed reaching 68.00 wt% of Fe, 2.13 wt% of SiO2, and 95.1 wt% of magnetite.
The objective of this work was to study both the effect of slime coatings and pulp rheology on the recovery of chalcopyrite from a clay rich flotation pulp, with the aim of decoupling the two effects and attempting to quantify their relative magnitudes. This was achieved by studying a model batch flotation system in the absence of reagents.
Flotation separation of chalcopyrite from pyrite using lime or cyanides as depressants results in serious problems, such as the blockage of pipelines and environmental pollution. Eco-friendly organics are a future trend for beneficiation plants. In this research, the eco-friendly organic depressant sodium humate (SH) was chosen as a …
The performance of chalcopyrite flotation was used as the final factor in determining the characteristics of both the grinding media. ... The particle size distributions of the grinding solid samples were measured by the screen sizing method. A series of screens with mesh sizes of 25, 34, 43, 74, and 350 µm were used in the tests. ...
The selective depression behaviors of LBG in the chalcopyrite-pyrite flotation separation have, nevertheless, rarely been reported. In this work, micro-flotation tests were performed to separate chalcopyrite from pyrite using LBG as a selective depressant. The interaction mechanism between LBG and pyrite was investigated …
For the flotation experiments of artificially mixed minerals, 2.0 g samples with a chalcopyrite to molybdenite mass ratio of 3:2 were used as the feed samples. All the other operation procedures were the same as the single mineral flotation experiment mentioned above. The flotation recovery of chalcopyrite or molybdenite was obtained …
Formation of hydrogen peroxide (H 2 O 2), an oxidizing agent stronger than oxygen, by chalcopyrite (CuFeS 2), which is a copper iron sulfide mineral, during grinding, was investigated.It was observed that chalcopyrite generated H 2 O 2 in pulp liquid during wet grinding and also in the solids when placed in water immediately after dry grinding. …
A novel collector IBATC was synthesized and used in the flotation separation of chalcopyrite, pyrite and sphalerite. IBATC can effectively separate chalcopyrite from sphalerite and pyrite with pH of 9.5–10 and concentrate of 30–40 mg/L. IBATC chemically adsorbed on chalcopyrite surface, whereas physically adsorbed on sphalerite and …
In the flotation of chalcopyrite and molybdenite, these two minerals are generally floated together into the Cu/Mo concentrate in the presence of diesel or selective ester collectors due to their relatively good natural floatability [4], and then to separate from each other with the help of Na 2 S/NaHS [5], [6], cyanide [7], Nokes' reagents ...
The flotation recovery of chalcopyrite reached a maximum value of 92.43% at a BEAT molar fraction of 60%. These results manifested that the mixtures of IPETC and BEAT had a synergistic effect on the flotation of chalcopyrite, and the optimal synergistic fraction was 60% (IPETC:BEAT = 2:3) of the BEAT molar fraction to mixed collectors.
The flotation tests results proved that IBATC was inclined to collect chalcopyrite compared with pyrite and sphalerite. Especially in the pH range of 9.5-10 and IBATC concentrate of 30-40 mg/L, the recovery of chalcopyrite exhibited more than 80%.
The flotation results indicated that L-cysteine exhibited stronger depressing ability than the conventional chalcopyrite depressants of Na2S, NaHS and sodium thioglycolate, suggesting it could ...
The NovaCell. The NovaCell™ is a universal broad range froth flotation device, that can capture particles over a wide range of particle sizes, from the lower limit of flotation to an upper size that varies with the density of the particles. The top size for base metal sulphides is at least 2 mm, but for coal it can be as large as 4–5 mm.
The flotation separation between chalcopyrite and galena, however, presents much challenges in industrial productions and laboratory-scale experimental investigations [9], [10], [11]. This phenomenon can be attributed to the homogenized surface features and extremely similar floatability during grinding and after exposure to collector [8], [12].
The flotation experiments of pure chalcopyrite with slurry flow rate of 0.4 m 3 / h and 0.5 m 3 / h and median diameter d50 = 45 μm were carried. The particle transport equation was coupled with the hydrodynamic model as a. CRediT authorship contribution statement. Wentao Chen: Data curation, ...
In flotation, fine particles do not collide with air bubbles hence the low recovery of fines to froth. Fig. 2 shows the experimental results of flotation vs model calculation results for fine chalcopyrite (D 50 = 2.3 µm) and coarse chalcopyrite (size: –106 + 75 µm). The results show that recovery of fine chalcopyrite was much lower …
Abstract. In the present work an intense bibliographic search is developed, with updated information on the microscopic fundamentals that govern the behavior of flotation operations of ...
Xanthate, due to its superior collecting ability, is widely used in the field of minerals flotation. However, its weak selectivity and foul odor make it difficult to separate chalcopyrite from pyrite and reduce pollution. This work provides an efficient and odorless collector to selectively separate chalcopyrite from pyrite. Amide group was introduced …
In the electrochemical Denver flotation cell, a platinum 100 mesh screen electrode of 10 10 cm with a total surface area of 7850 cm2 was used and connected to the potentiostat. A bed of 200 g sedimented particles was electro- chemically preconditioned for 10 min at the desired potential. ... How- ever, if the flotation of chalcopyrite could ...
Removing molybdenite from chalcopyrite by flotation has long been a challenge due to their similar floatability as sulfide minerals. However, the difference in the magnetic susceptibility of the two … Expand. 2 [PDF] Save. Separation of Copper-Molybdenum Flotation Concentrate by Superconducting High-Gradient Magnetic …
The effect of sodium sulfite (Na 2 SO 3) on the floatability of chalcopyrite and enargite was investigated in this work.The micro flotation tests of single and mixed minerals were performed under various concentrations of Na 2 SO 3.The micro flotation tests of single minerals showed that Na 2 SO 3 depressed the floatability of both …
To analyze the flotation performance of the pure pyrite and chalcopyrite samples, tests were carried out on a flotation machine (XFCG II, Jilin). Of the pure mineral sample, 2 g was placed in a beaker, 50 mL of deionized water was added, the sample was treated with an ultrasonic cleaner for 5 min and allowed to settle for 3 min, after which the ...
The application of Fe 3+ and NH 4 + in the flotation separation of chalcopyrite and arsenopyrite were investigated by micro-flotation tests, infrared spectroscopy, local electrochemical impedance spectroscopy, X-ray photoelectron spectroscopy, Time-of-flight secondary ion mass spectrometry, surface adsorption …
Micro-flotation tests, adsorption, electrokinetic and FTIR measurements were carried out in order to investigate the selective depression mechanism of sodium glycerine-xanthate (SGX) on pyrite in chalcopyrite flotation. The flotation results showed a large difference in chalcopyrite (>85%) and pyrite (<30%) recovery as stirred pulp-mixing with ...
Zinc sulfate is a commonly used selective depressant for zinc sulfide minerals, and a mixture of ZnSO 4 and Na 2 CO 3 is an effective combined inhibitor for talc. This study indicated that only using ZnSO 4 could inhibit talc in chalcopyrite flotation and its depression mechanism was investigated. Microflotation tests indicated that ZnSO 4 …
Flotation recovery of the chalcopyrite reached about 90 % within the pH range. After adding the PASP, flotation recovery of the chalcopyrite decreased by 2 % to 4 %. The recovery of arsenopyrite without adding the PASP was more than 80 %, that was not much different from that of chalcopyrite at pH 3.0 ∼ 7.0.
2.2.2 Flotation. Denver SubA type flotation machine with 1 L cell was used in the experiments. Experiments were carried out with artificial mixtures prepared by mixing ore samples with a certain amount of clay, and flotation conditions were given in Table 1.Flotation variables were chosen as clay type (kaolinite, illite, and montmorillonite) and …
Fenton oxidation promoted selective flotation separation of chalcopyrite from pyrite, and the selectivity index was 5.69.. This study unpacks a novel way for the clean utilization of AMD in the copper sulfide ore flotation.. Multitude formation of Fe (III)–OOH (50.04%) and Fe 2 (SO 4) 3 (29.19%) depressed the pyrite flotation.. A small …
With 1.0 × 10 −6 mol·L −1 PN, BN or HN, the effect of pH on the flotation recovery of chalcopyrite is shown in Fig. 2 (a), which indicates that the collecting power of the three triazine dithiol collectors to chalcopyrite was in the order of HN > BN > PN, being consistent with their carbon chain length. For BN and HN, the suitable pH values for …
The micro-flotation and adsorption tests further proved that THA was an effective collector for chalcopyrite flotation. The UV spectra of THA with different metal ions including Cu +, Fe 2+ and Pb 2+ illustrated that THA can selectively react with Cu + than with Fe 2+ or Pb 2+. Hard-Soft-Acid-Base (HSAB) theory defines acid or base by …
1. Introduction. Metal ions that commonly exist in flotation pulp, such as Cu 2+, Pb 2+, and Ca 2+, can cause the non-selective activation of metallic sulfides and gangue particles in the separation of metallic sulfide ores by flotation.In most cases, these metal ions are also known as unavoidable ions. Recently, several researchers …
