This paper investigated the effects of using or not using potassium butyl xanthate (PBX) as a collector on the flotation kinetics of talc and chalcopyrite. By means of atomic force microscopy (AFM), Fourier-transform infrared spectroscopy (FTIR), a contact angle measuring instrument and particle size analyzer, the underlying causes …
• Magnetite pellet feed recovery from chalcopyrite dam copper otation tailings. • Process route comprises scalping screen, low eld rougher, and cleaner magnetic separations and silicates reverse cationic otation as recleaner step. • High-quality magnetite pellet feed reaching 68.00 wt% of Fe, 2.13 wt% of SiO 2, and 95.1 wt% of magnetite.
Flotation of chalcopyrite, pyrite, and molybdenite in porphyry copper ores. Collector S-9844 Dextrin as a pyrite depressant shows satisfactory results when low mineral surface …
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 …
Chalcopyrite and pyrite show recovery of over 90% when working with SBX and MIBC at pH 4–10. An increase in pH to 11.5 allowed lowering the pyrite recovery to …
TECHNICAL ARTICLE Selective Adsorption Mechanism of Ferric Ions on the Surfaces of Chalcopyrite and Pyrite in Flotation FENG ZHANG,1 CHENYANG ZHANG,1,2,6 HONGLIANG ZHANG,1 PAN CHEN,3 RONG WANG,1 DAIXIONG CHEN,4 JIANHUA CHEN,5 MENGJIE TIAN,1 and WEI SUN1 1.—Engineering Research Center of Ministry …
The ground products were sieved using a standard screen with a pore size of 74 μm. The 90 wt% of the ground products passed through the 74 μm screen in the CIB and CB media was obtained at the grinding times of 4 min and 9 min 30 s, respectively. ... Flotation separation of chalcopyrite and pyrite in different grinding medium systems as …
DFT calculations further reveal that TBOEX can form a stable and tightly arranged adsorption layer bridged by water molecules on the surface of chalcopyrite through two paths, and interact with d orbitals of copper atoms in the form of Cu-S tetrahedra through π* orbitals, finally improving the flotation recovery of chalcopyrite.
In the clean ore mixture, 10 g of chalcopyrite was used as the valuable mineral, with 90g of quartz as gangue mineral, which was then transferred to a 0.5 L plexiglass flotation cell The agitation speed was kept at 170. 0 rpm throughout the flotation experiments. ach testFor e, a calculated amount of quartz g,, 10
The separation of chalcopyrite and pyite is not fully solved, and thus more efficient depressants are still needed in industry. This paper used potassium permanganate (KMnO4) as a pyrite depressant to separate pyrite from chalcopyrite. Flotation and contact angle results indicated that pyrite could be depressed by KMnO4 at pH 7, while …
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 …
The finer the material, the greater is the percentage of recovery; the pyrite should pass at least a 170-mesh screen in order to get efficient flotation under the conditions of the tests. Of the many factors affecting flotation, only two—the oil and the other agent used—were made variable.
1. Introduction. Chalcopyrite (CuFeS 2) is one of the primary copper sulphide minerals and it accounts for 70–80% of the global copper (Cu) reserves (Baba et al., …
DOI: 10.7939/R3NK91 Corpus ID: 103904804; The Role of High Molecular Weight Polyethylene Oxide in Reducing Quartz Gangue Entrainment in Chalcopyrite Flotation by Xanthate Collectors
This study focused on the selective galena depressive mechanism of tea polyphenol in chalcopyrite flotation. The mixed mineral flotation experiments yielded a copper recovery rate of 83.07 % and a copper grade of 29.32 % for the copper concentrate, as well as a lead recovery rate of 91.13 % and a lead grade of 71.37 % in the lead …
It is difficult to separate molybdenite and chalcopyrite by froth flotation due to the good floatability of the two minerals. In this paper, the separation of copper–molybdenum sulfide minerals was realized by using pullulan polysaccharide (PU) as the depressant. The flotation test results showed that the copper concentrate grade …
be obtained as a result of flotation will be ensured. Key words: clay minerals; dynamic froth stability; flotation; response surface model; ζ-potential Cite this article as: Hasan Ali TANER, Vildan ONEN. Evaluation of the effect of the main parameters on chalcopyrite flotation in the presence of kaolinite and montmorillonite [J].
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". …
The effects of ceramic balls (CB) and cast iron balls on grinding and flotation performances were compared. • Grinding with CB exhibited lower Fe 3+, Cu 2+ concentration and pH, as well as higher DO.. Grinding with CB resulted in smoother surface, less floccules, better hydrophobicity and lower iso-electric point.. Grinding with …
In the dry screening process, the standard screen was used, and the operation was carried out in strict accordance with the specified screening time and ... The impact of DAHP dosage on the flotation of chalcopyrite and molybdenite is depicted in Fig. 3. The results indicated that both minerals were difficult to separate by flotation …
Environmentally friendly, flexible and affordable flotation depressants are needed due to the depletion of easy-to-process high-grade ores as well as sustainability and environmental concerns. This paper discusses various organic depressants that have been adopted for selective depression of unwanted minerals in chalcopyrite flotation.
The single minerals, chalcopyrite and pyrite, were obtained from GEOdiscoveries, Australia. Their elemental compositions were analysed by ICP-MS and shown elsewhere (Mu and Peng, 2019).The XRD patterns of chalcopyrite and pyrite samples are shown in Fig. 1 (a) and (b), respectively. The impurities in chalcopyrite are …
The effect of galvanic interactions among sulfide minerals such as chalcopyrite, galena, and sphalerite in the presence and absence of a grinding ball material on the flotation recovery of chalcopyrite has been studied. X-ray photoelectron spectroscopy (ESCA) studies were carried out to identify the reaction products on the sulfide minerals after …
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) (Peng and Zhao 2011).
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 ...
In the chalcopyrite- galena flotation system, POCA demonstrates notable selectivity for galena and chalcopyrite. The optimal flotation conditions were identified as follows: Under the conditions of a 50 mg/L POCA concentration and a pH level of 9, the recovery efficiency of chalcopyrite flotation remains notably high, hovering around 80 %.
In the flotation separation of copper-lead-zinc complex polymetallic sulphide ores, the separation of chalcopyrite from galena is difficult because both of them have good floatability. Therefore, the development of a green, eco-friendly and selective galena depressant is highly required. In this work, sodium polyaspartate (PASP) was used as a …
Studies have also shown the uses of non-toxic and bio-degradable organic materials as the galena depressants for Cu-Pb sulfide minerals separation. For example, Zhang et al. [4] used sodium polyaspartate to hinder galena in chalcopyrite flotation under a weakly alkalinized pulp environment, resulting in a high-quality copper-bearing product.
The lattice energy of chalcopyrite is close to 17,000 kJ mol −1, and the standard enthalpy of formation ΔH f and the standard Gibbs free energy of formation ΔG f ° values are −193.6 and −190.6 kJ mol −1, respectively.These ΔH f and ΔG f ° values are in the common range for sulfide minerals and do not explain the recalcitrance and unfavorable kinetics of …
In this paper, a novel surfactant, N,N-diethyl-N ′-cyclohexylthiourea (DECHTU) was synthesized and first introduced as a collector for chalcopyrite flotation.The micro-flotation results demonstrated chalcopyrite with adsorbed DECHTU exhibited good hydrophobicity and was effectively concentrated by nitrogen bubbles …
A high throughput screening model of solidophilic flotation reagents for chalcopyrite based on quantum chemistry calculations and machine learning. Author links open overlay panel Jianyong He a 1, Li Wang b 1, Chenyang Zhang a c d, ... In this work, an efficient QC + ML model has been built to screen the target flotation functional …
One of the problems in flotation is mechanical entrainment and the other is the presence of complex gangues (especially clay minerals). In the present study, it was aimed to determine the effects of clay types (kaolinite, illite, and montmorillonite) on mechanical entrainment parameters (total flotation recovery, real recovery, mechanical …
fects chalcopyrite flotation. In the presence of a medium amount of kaolinite (0.24wt%), chalcopyrite flotation was moderately affected in pH value range from 4 to 6. However, it was greatly affected in the alkaline pH value range, where the floatability decreased by approximately 10%. In the presence of a large amount of kaolinite (0.60wt ...
Fig. 2 shows chalcopyrite flotation recovery in the pure water, sea water and 0.05 M MgCl 2 solutions at pH 10. The cumulative recovery was approximately 70% in pure water after 10 min, indicating a good natural floatability of chalcopyrite. An apparently lower chalcopyrite recovery of 58% was observed in sea water, especially in the initial …
Acid mine drainage (AMD) released from copper sulfide contains a large quantity of sulfuric acid and heavy metals, thus being a threat to the surrounding ecosystem. In this study, AMD is used to evaluate options for activation of chalcopyrite depressed by a high alkali solution (HAS). The results showed the flotation recovery of …
1. Introduction. Froth flotation process separates solid particles based on the differences in physical and surface chemistry properties. It is the most efficient and cost effective for particles within a narrow size range, nominally from 10 to 100 μm for the minerals [1], [2].The lower and upper particle size limits are due to the low probability of …
Fig. 2 shows chalcopyrite flotation recovery in the pure water, sea water and 0.05 M MgCl 2 solutions at pH 10. The cumulative recovery was approximately 70% in …
Fig. 2 shows the true flotation recoveries of chalcopyrite and water recoveries from flotation in CaCl 2 solutions with varying concentrations. As can be found, the true flotation recovery of chalcopyrite dropped marginally from 15.9 % in deionized water to 12.4 % in CaCl 2 solution with a low concentration of 0.03 M. However, as the …
Formation of hydrogen peroxide (H2O2), an oxidizing agent stronger than oxygen, by chalcopyrite (CuFeS2), which is a copper iron sulfide mineral, during grinding, was investigated.
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 …