Both chalcopyrite and talc used for all experiments were collected from Yip's Mineral Specimen Company. After being hammered, hand-selected, dry-ground, and screened, a sample of 38−74 μm fractions was prepared for micro-flotation studies and −38 μm fractions were collected for adsorption tests, zeta potential measurements and …
The article presents the synthesis and application of a novel collector, 5-methyl butylxanthate-1,2,4-triazole-3-thione (MBuXTT), for chalcopyrite flotation separation from pyrite. Various interfaces and surface characterization analysis methods were employed to study the flotation separation mechanism. The micro-flotation and …
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 …
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., 2012, Nyembwe et al., 2019, Schlesinger et al., 2011).Froth flotation is usually applied to concentrate copper ores and separate copper minerals from the gangue. Currently, …
A multi-scale investigation was conducted to study the surface properties of xanthate-absorbed chalcopyrite at elevated temperature to understand the temperature effect on the xanthate's performance during chalcopyrite flotation. Firstly, a macro-scale study was initiated to investigate the temperature effect on the hydrophobicity of …
Novel ether thionocarbamates, O-butoxy isopropyl-N-ethoxycarbonyl thionocarbamate (BIPECTC) and O-(2-butoxy-1-methylethoxy) isopropyl-N-ethoxycarbonyl thionocarbamate (BMIPECTC), were synthesized in this study. Their collecting efficiencies in the flotation of chalcopyrite were investigated using flotation tests, adsorption …
Therefore, chalcopyrite flotation is commonly carried out under alkaline condition to reduce the decomposition of xanthate [7]. However, the flotation process faces many challenges, especially when low-grade ores frequently associated with other sulfides such as pyrite (FeS 2), deteriorating chalcopyrite flotation [8]. Therefore, maintaining a ...
The chalcopyrite flotation performance as a function of sodium butyl xanthate dosage is shown in Fig. 9 a. The results show that chalcopyrite remained recoverable in the absence of sodium butyl xanthate due to its natural floatability. However, the chalcopyrite recoveries from the CB and CIB media grinding systems were low, at …
Efficient and clean flotation separation of copper-sulfur has attracted soaring interest in the beneficiation of sulfide ore. The objective of this work was to examine the influence of calcium hypochlorite (Ca(ClO) 2) oxidative modification on the flotation separation of chalcopyrite from pyrite in acid mine drainage (AMD) system.A maximum recovery …
Separation effects of sodium polyacrylate (PAAS) and gum Arabic (GA) on flotation of chalcopyrite and magnesium silicate minerals using potassium butyl …
1. Introduction. Copper is the first metal used and discovered by human and its plays an irreplaceable role in national economic construction. Chalcopyrite is the main mineral resource for extracting copper, and froth flotation is one of the important methods for selective enrichment and recovery of chalcopyrite [1].In the flotation process, the …
The flotation performance of single pyrite and chalcopyrite samples was investigated using a small-scale flotation machine with a volume capacity of 40 mL at an impeller speed of 1950 rpm. The microflotation tests …
However, in the presence of 4 × 10-4 mol/L of L-cysteine, the flotation recovery of chalcopyrite reduced to approximately 20% at pH 4, and further reduced to 5% at pH 12. Compared to chalcopyrite, the depressive effect of L-cysteine on molybdenite was negligible in the tested pH range. These results indicated that L-cysteine could …
In a chalcopyrite and pyrite flotation system, the effect and mechanism of organic depressant sodium dimethyl dithiocarbamate on the hydrophobicity of …
Ca ions used to depress pyrite in chalcopyrite flotation are also used to obtain clay agglomerates in dewatering processes. Recent studies have shown that in addition to fine particle size, the aggregation structures of clay minerals in the pulp also play a critical role in the degree of entrainment [29, 30]. Increasing particle size with clay ...
In this study, the synergistic effect of seawater ions plays a dominant role to selectively depress pyrite from chalcopyrite flotation.
1. Introduction. Chalcopyrite (CuFeS 2) is referred to as a main copper-bearing sulfide mineral, which is generally associated with many gangue minerals, particularly pyrite (FeS 2).Pyrite is an ubiquitous component of sulfide minerals, but its presence in chalcopyrite deposits usually leads to a marked decrease in Cu grade and …
Effects of MF1011 on chalcopyrite flotation against kaolinite. In this section, the ability of MF1011 in reducing kaolinite entrainment in chalcopyrite flotation was studied. Fig. 6 shows the flotation recovery obtained from single mineral tests at different concentrations of MF1011 in the presence of PAX at pH 9 in saline water. As …
Chalcopyrite and the filling materials used in the experiments were obtained from Yunnan Province and Anhui Province, China. After a series of crushing (jaw crusher), dry grinding (ceramic ball mill), and screening (standard sieve) steps, minerals with particle sizes of 0.038–0.074 mm were used for flotation experiments.
Chalcopyrite, as the most abundant and widespread copper-bearing mineral (accounting for nearly 70% of the Earth's copper), is a primary source of copper [1,2,3].Froth flotation is the most often used method to obtain chalcopyrite from natural ores due to its natural floatability stemming from different surface properties …
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 …
To effectively separte pyrite from chalcopyrite, tetrazine thione group and hydrocarbon chain were combined to synthesize tetrazine thione collectors. The flotation performance of tetrazine thione collectors on chalcopyrite and pyrite was investigated, and the influence of different hydrophobic groups on the flotation performance was …
This paper used potassium permanganate (KMnO 4) as a pyrite depressant to separate pyrite from chalcopyrite. Flotation and contact angle results indicated that …
In this study, chalcopyrite was oxidized in hydrogen peroxide (H 2 O 2) solutions of different concentrations to simulate different degrees of oxidation in real ores, and the effects of H 2 O 2 treatment on chalcopyrite surface properties and flotation performance were investigated by surface analysis techniques and floatation …
1. Introduction. Chalcopyrite is the main copper-bearing mineral on Earth and an important raw material for obtaining metallic copper. Froth flotation is considered an effective separation method for sulfide ores and has been applied at the industrial scale for many years [1], [2].Milling is a key procedure with a significant impact on the subsequent …
XPS and HPLC results show that iron grinding media contact with chalcopyrite, reducing elemental sulfur content of the chalcopyrite surface, improving …
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 …
This selective synergistic behavior endowed BETX with excellent selective flotation ability for chalcopyrite, with a dosage an order of magnitude lower than that of traditional collectors. ToF-SIMS, FTIR, and XPS demonstrated that BETX interacts with chalcopyrite through the xanthate group and the deprotonated thionocarbamate group. …
The chunk chalcopyrite samples were artificially crushed and ground in an agate mortar by a pestle, and then dry-screened. The fraction with a diameter ranging from 38 to 76 μm was adopted for flotation and adsorption tests.After being washed 3 times (1 min per time) in distilled water under an ultrasonic bath, the chalcopyrite fraction was …
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.
