Agglomeration-Flotation of Finely Ground Chalcopyrite …

The chalcopyrite specimen was crushed using a jaw crusher (1023-A, Yoshida Manufacturing co., Ltd, Sapporo, Japan) and ground by a vibratory disc mill (RS100, Retsch Inc., Haan, …

Investigation of pullulan polysaccharide as a sphalerite …

Compared to the flotation of single chalcopyrite or sphalerite (Fig. 2 c), the binary mineral flotation system resulted in lower chalcopyrite recoveries and slightly sphalerite recoveries with the same PP dosage. This outcome is related to the presence of the galvanic interaction between chalcopyrite and sphalerite.

The separation of chalcopyrite and chalcocite from pyrite in cleaner flotation after regrinding

Effects of Xanthate on Flotation Kinetics of …

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 …

Agglomeration-Flotation of Finely Ground Chalcopyrite …

XRD analysis indicated that chalcopyrite is the major mineral, while actinolite (Ca2Mg3Fe2Si8O22(OH)2), quartz and sphalerite are minor minerals. Table 1. Chemical composition of the chalcopyrite sample. Elements Cu Fe S Zn Si Ca wt.% 26 27 26 0.8 6 2 The chalcopyrite specimen was crushed using a jaw crusher (1023-A, Yoshida Manufacturing

Differential depression of calcium lignosulfonate on chalcopyrite …

Molybdenite (MoS 2) is the principal and strategic source of molybdenum (Mo), a rare metal (Zhang et al., 2022).It often co-exists in complex assemblages with copper sulphide minerals, especially chalcopyrite (CuFeS 2) in porphyry copper deposits across the world (Yang et al., 2021).In industry, most copper-molybdenum processing plants employ flotation to recover …

Flotation performances and surface properties of chalcopyrite …

With enough amounts of sodium butyl xanthate addition, adding the collector before grinding recovered more chalcopyrite than adding it after grinding in single mineral flotation.

Evaluating the sulphidisation and flotation of oxidised chalcopyrite …

By using a jaw crusher and a roll crusher, it was crushed and screened to collect the −3.35 + 0.71 mm size fractions which were sealed in polyethylene bags and stored in a freezer at –20 °C to avoid unintended surface oxidation. ... The recoveries of the chalcopyrite in flotation under various conditions, unoxidised, oxidised and ...

Effects of grinding media on grinding products and flotation

The performance of chalcopyrite flotation was used as the final factor in determining the characteristics of both the grinding media. ... Samples of high purity were selected and crushed using a jaw crusher and roll crusher, and then screened to obtain particle size fractions of −1 + 0.5 mm. Gravity separation was used to remove impurities ...

Flotation performance of chalcopyrite in the presence of …

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, there are a number of challenges faced …

Agglomeration-Flotation of Finely Ground Chalcopyrite and …

The laboratory-scale flotation test results indicated that flotation recovery of chalcopyrite fine and ultrafine particles increased by approximately 16–21% in the presence of nano-microbubbles ...

Selective flotation of chalcopyrite from pyrite via seawater …

In this study, the synergistic effect of seawater ions plays a dominant role to selectively depress pyrite from chalcopyrite flotation.

The galvanic interaction between chalcopyrite and pyrite …

Pyrite (FeS 2) is normally a gangue mineral widely associated with valuable base metal sulfide minerals such as chalcopyrite (CuFeS 2), chalcocite (Cu 2 S), galena (PbS) and sphalerite (ZnS) which are the major mineral sources for copper, lead and zinc. The economic extraction of metals requires selective separation of pyrite from these base metal sulfide …

Selective inhibition of kaolinite entrainment during chalcopyrite …

The sample was crushed through a roll crusher followed by screening to obtain a particle size fraction of +0.6–3.2 mm. The collected particles were split into 1 kg portions and then transferred into polyethylene bags for storage in a freezer until required. ... Effects of MF1011 on chalcopyrite flotation against kaolinite. In this section ...

The effect of oxidized starches on chalcopyrite flotation

The flotation results showed that BDT had good flotation selectivity for chalcopyrite and galena, which achieved up to 96.67 % and 50.26 %, respectively, at pH 6 using a collector dosage of 100 g/t. The analysis of the adsorption mechanism showed that C S and C O in BDT are mainly involved in the adsorption process.

Selective Separation of Chalcopyrite from Pyrite …

In this research, the eco-friendly organic depressant sodium humate (SH) was chosen as a depressant to separate chalcopyrite from pyrite by flotation. The results indicated that SH could selectively depress pyrite owing …

Recover Ultrafine Chalcopyrite by Flotation

The ore sample was crushed with laboratory jaw and roll crushers to below 2,000-µm size. Each kilogram of the ore sample was ground with saturated lime water in a rod mill at 70 pct solids for 10 min. ... In the flotation of chalcopyrite, there was no conclusive evidence that some of the ultrafine chalcopyrite particles are selectively ...

Dual effects of sodium sulfide on the flotation behavior …

B. Taheri et al., Dual effects of sodium sulfide on the flotation behavior of chalcopyrite: I. Effect of pulp potential 417 value and Eh were monitored continuously throughout each flotation test. The pH value was measured using a glass electrode (model Metrohm 826). A phosphate base buffer solution was used to maintain a pH value of 12 ± 0.5.

Identifying true collectorless flotation of chalcopyrite 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 CaCl 2 concentration escalated …

Zhengzhou Huahong Machinery Equipment Co., Ltd.

Our company mainly produces all kinds of jaw crushers, impact crushers, cone crushers, hammer crushers, Raymond mills, sand making machines, mineral processing equipment, milling …

Investigation the effect of filling materials on chalcopyrite flotation

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.

Differential depression of calcium lignosulfonate on chalcopyrite …

Firstly, a high amount of Na 2 S or NaHS is required to sufficiently depress chalcopyrite flotation, and secondly, Na 2 S is toxic and produces highly toxic hydrogen sulphide ... After hand-picking, the chalcopyrite and molybdenite samples were crushed using a small jaw crusher and a shredding device, respectively. The crushed samples were ...

Selective flotation of chalcopyrite from pyrite via seawater …

Chalcopyrite sample was collected from Peru (Chile) while pyrite sample was obtained from Daye (China). After crushing, grinding and sieving, the high-purity samples were sized in the range of 75–150 μm with a D 80 of 131 μm, which were further cleaned in ethanol solution via sonication and then freeze drying. The prepared powders were then transferred …

Froth Flotation of Chalcopyrite/Pyrite Ore: A …

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...

A modified model based on CFD simulation and experiments …

For the purpose of prediction of turbulent flotation, this study conducts flotation experiments of chalcopyrite pure minerals under strong turbulent environment of smooth tube, VG tube and 0.4–0.7 m 3 /h slurry flow rate, and the flotation rate constant of mineral particles with particle classes 0–45 μm, 45–75 μm, 75–125 μm and 125–180 μm are investigated.

(PDF) Effect of the Water Hardness Level on Chalcopyrite Flotation

Effect of the Water Hardness Level on Chalcopyrite Flotation Inhibition by the Disodium Carboxymethyl Trithiocarbonate ... 100 pollution-free jaw crusher, particles. with a size range of 0.6–3.5 ...

The selective flotation of chalcopyrite against galena using …

The big crystals of the two minerals were crushed into small fractions with a jaw crusher. The hand-selected, small, pure mineral crystals were further crushed in a roll crusher and then dry-sieved. The screening products of the −3 + 1 mm-size fractions were stored for subsequent grinding, flotation, zeta potential, FT-IR and XPS measurements ...

Heterogenous carrier flotation technique for recovering …

Carrier flotation has been studied extensively for ultrafine coal particles (Zhou et al., 2020, Bu et al., 2020).Similarly, finely ground hematite particles have been floated using coarse hematite particles as carriers (Li et al., 2017).In the case of chalcopyrite, we have previously studied the effect of coarse chalcopyrite as a carrier on the flotation behavior of finely ground …

Mechanism of Mechanical Entrainment in Chalcopyrite Flotation…

Effects of clay types and clay amount on chalcopyrite flotation were investigated by flotation experiments. Interaction mechanisms between the clay minerals and ore were characterized using SEM–EDS analyses. ... Hand-picked ore samples were crushed to a size of -1.18 mm in a jaw crusher and quantity of sample was reduced. 1/3 of the sample ...

Insight into the effect of ultrasonic treatment on surface …

For chalcopyrite after galvanic corrosion, as the ultrasound power increases from 0 W to 100 W, the flotation recovery of chalcopyrite decreases from 54.19 % to 1.01 %, indicating that the use of HUT of chalcopyrite after GC will significantly reduce the flotation recovery of chalcopyrite, and the higher the ultrasound power, the lower the ...

The application of KMnO4 in reverse flotation separation of

However, this agent also depressed chalcopyrite flotation, especially under alkaline conditions with a pulp pH of 8–11, resulting in significant suppression of chalcopyrite flotation. For many years, researchers have been seeking efficient depressants for separating chalcopyrite and talc in a direct flotation system, but with limited success ...

Statistical Evaluation of Flotation Behavior of Chalcopyrite …

The chalcopyrite deposit in Malanjkhand, India, is the largest copper ore producer in the country. However, its flotation performance has room for improvement. This study used standard flotation experiments using a mechanical flotation cell using a conventional collecting reagent and a collector blend consisting of xanthate and ester. A three-factor, three-level Box …

Selective flotation separation of molybdenite from chalcopyrite …

Chalcopyrite and molybdenite are typical sulfide minerals known for their oxidation tendency, and extensive literatures suggest that the flotation behavior of sulfide minerals is closely related to the degree of surface oxidation [10], [14].As a result, a number of oxidation pretreatment technologies such as plasma pretreatment [15], hydrogen peroxide (H 2 O 2) [16] …

Effect of pyrite content on chalcopyrite flotation under …

This study aimed to investigate the effect of varying pyrite (Py) content on copper (Cu) in the presence of different regrinding conditions, which were altered using different types of grinding media: iron, ceramic balls, and their mixture, followed by flotation in the cleaner stage. The flotation performance of rough Cu concentrate can be improved by changing the …

(PDF) Effects of Sodium Alginate on the Flotation Separation …

The micro-flotation results showed that sodium alginate exhibited selective and strong depressant effect on the galena flotation while had little influence on the chalcopyrite flotation, whether ...

Selective Separation of Chalcopyrite from Pyrite …

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 …