- Mon - Sat 8:00 - 18:00
- [email protected]
- 0086-21-58386256
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, …
The effect of SMA on the flotation of chalcopyrite and pyrite was investigated in terms of pulp pH and depressant concentration, as shown in Fig. 2. It can be described from Fig. 2(a), good floatability of chalcopyrite was achieved in entire experimental pH range without the addition of depressant SMA, and the chalcopyrite …
In this research, the influence of pH, particle size, the type of collector and frother and their concentration was studied on the flotation kinetic parameters, rate …
In this work, we present a novel machine learning (ML) model that can evaluate and predict the recoveries of sulfide minerals (chalcopyrite, galena, pyrite and …
Selective flotation of chalcopyrite from pyrite is possible at pH=10 and is impossible at pH=4. • Recovery of the selective flotation for chalcopyrite with TC is significantly higher than with DTP. Electrophoretic light scattering is a useful technique to study heterocoagulation, non-coagulation interactions and to diagnose flotation …
Flotation of chalcopyrite Two preliminary flotation tests were conducted in parallel on Texasgulf Type-A ore. In both tests, the ore (-10 mesh) was ground for 20 min in the presence of 0.84 kg/ton of Na2 S and floated with 0.04 kg/ton of Dowfroth 250. The only difference between the two tests was the pH.
Micro-flotation tests were carried out to investigate the influence of Fe 3+ /Ca 2+ on CMC's depression effect towards chalcopyrite flotation. Fig. 2 depicted the flotation behavior of chalcopyrite at different pH conditions. The pristine chalcopyrite showed good floatability and its recovery was maintained at around 80% within detected …
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 …
The flotation recovery of chalcopyrite and pyrite in the absence and presence of depressant carrageenan (concentration: 100 mg/L) as a function of pulp pH was illustrated in Fig. 3. The results demonstrated that the recoveries of chalcopyrite remained consistently high (exceeding 90 %) throughout the experiments at various pH levels …
Chalcopyrite and galena are primary raw materials for producing Cu and Pb metals, respectively. Flotation is still the main method to recover these two minerals. So far, lots of work has been …
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 chalcopyrite, the main …
Fig. 2 (a) illustrates the relationship between the flotation results of chalcopyrite and molybdenite and pH value of pulp at collector dosage of 1×10 −5 mol·L −1.As depicted in Fig. 2 (a), pH value exerts negligible impact on the flotation performance of chalcopyrite, while it significantly affects the recovery of molybdenite. Compared with …
Selective flotation of chalcopyrite from pyrite is possible at pH=10 and is impossible at pH=4. ! Recovery of the selective flotation for chalcopyrite with TC is significantly higher than with DTP. Electrophoretic light scattering is a useful technique to study heterocoagulation, non-coagulation interactions and to diagnose flotation selectivity.
Chlorite and serpentine are common magnesium-containing gangue minerals in copper sulfide flotation. In this study, sodium alginate, a natural hydrophilic polysaccharide, was introduced as a selective depressant for these gangue minerals. Micro-flotation tests were conducted on both single minerals and synthetic mixtures. The …
To address the issue of mediocre separation efficiency of depressants in the copper-lead separation process, this article synthesized a macromolecular organic depressant, polymaleic anhydride-ethylenediaminetetraacetic acid (PMA–EDTC), using a polycarboxylic macromolecule as the backbone and also introducing –N–(C=S)–S– as …
Flotation solution chemistry, flotation tests, and X-ray photoelectron spectroscopy measurements confirmed that the dissolved calcium and iron materials …
Figure 3 showed the effect of PAAS dosage on the flotation behavior of chalcopyrite, serpentine and talc. The experiment was carried out at pH 7. It can be seen from Fig. 3 that the dispersant ...
The Problem with separating Copper from Zinc by flotation The treatment of heavy sulphide ores of copper containing zinc and pyrite is often extremely difficult particularly if soluble copper and sulphates are present. This is usually the case in ore deposits near the surface or in tropical countries where the annual rainfall is quite high. …
Is was observed a significant optimization in the concentration by froth flotation of the chalcopyrite by using Jig screen and the peptizes were removed during the flotation step. The hydraulic screen handling significantly improves the sludge removal, being more efficient than the use of the Denver Cell. Keywords: chalcopyritechalcopyrite ...
1. Representative analysis of chalcopyrite concentrate..... 3 2. Wet-screen analysis and distribution of elements in a typical chalcopyrite-concentrate sample..... 3 3. Magnetic susceptibilities of pure sulfide mineral samples..... 4 4. Magnetic separation of lead-copper rougher flotation concentrate. 6 5.
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 …
A flotation molecule set involving 47 molecules has been developed to obtain their affinity to possible surface sites of chalcopyrite [e.g. Cu(II), Cu(I), Fe(II)]. The …
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 …
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 …
This study investigated the effect of pyrite proportion on chalcopyrite and pyrite flotation via a tri-mineral system (chalcopyrite-pyrite-quartz) with a fixed Cu …
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 …
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 …
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 …
The cell was constructed with Plexiglas matching all the dimensions of the standard 500-g stainless steel Denver DR flotation cell. A stainless steel screen with 2-mm-size openings was mounted 1 cm from the bottom. The high turbulence near the impeller caused the air bubbles to break up as they flowed through the screen grid on …
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 …