required to reduce the size of ore from boulders to the size range, about 200 microns or less for most copper sulfide ores, where it can practically be floated using conventional technology. Most of the water used in mining is required to carry and convey fine ore particles through the process. Coarse particle flotation
This particle range is identified as the most favorable size for copper flotation in several works conducted by the authors [49,50,51,52]. The sieve analysis of mill product (flotation feed) is presented in Table 3. It should be mentioned that samples studied are in the oxide and sulfide forms (50% copper sulfide and 50% copper oxide) and their ...
The role of ore mineralogy on the flotation performance of copper-cobalt sulphides was studied by tracking the changes in mineral properties with time throughout the flotation process.
flotation of copper sulphide and oxide minerals by F. Ntengwe and L.K. Witika* Synopsis The Konkola Mine, a subsidiary of the Konkola Copper Mines Plc ... particle size in the feed, which reports ...
Test data indicates that significant improvements in the recovery of copper sulphide bearing particles between 200μm to 850μm can be achieved using Hydrofloat technology compared to …
Flotation rate for ten narrow particle size fraction in the rougher flotation was determined. The flotation rates were used as to evaluation particle behaviour during the flotation. An optimal particle size region with maximal copper recovery was found. At the same time, size fractions with significant copper losses were identified.
Complex Sulphide; Copper Sulphide; Flotation Test; These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves. ... Trahar, W.J. (1981) A rational interpretation of the role of particle size in flotation, Int. J. Miner. Process. 8, 289–327 ...
Cerussite's fine particle size and barite's high specific gravity complicate the separation process, emphasizing the importance of optimizing flotation parameters for effective mineral recovery. In addition, flotation is considered one of the best ways through which silver-bearing galena can be recovered.
The justification for this approach is well based as conventional flotation technology has a defined particle size range over which it can effectively recover floatable particles. Work by numerous experts has shown that currently available flotation technology is effective over a size range of approximately 15 to 150 microns.
Frother performance is clearly linked to collector level and to the predominate size range of feed particles being fed to flotation. Even with the same coal run on the same …
Recovery of mineralized coarse particles is notoriously low in conventional concentrators that treat copper porphyry ores. The application of coarse particle flotation techniques has the potential to achieve comparable metallurgical performance at significantly coarser primary grind sizings. ALS Metallurgy has been conducting both internal research and commercial test programs to …
Here, we investigate the efficacy of a ternary collector mixture consisting of ammonium dibutyl dithiophosphate (ADD), butyl xanthate (BX), and ethyl xanthate (EX) for the selective flotation of copper sulfide from a complex ore containing 0.79% Cu and associated precious metals (0.233 g/t Au and 5.83 g/t Ag).
In order to investigate the effect of particle size on the flotation performance in the separation of copper-gold-lead, froth products of various size fractions were collected as a function of flotation time. The optimum dosage of potassium dichromate (K 2 Cr 2 O 7) and sodium diethyldithiocarbamate (DDTC) were determined by flotation conditional tests. Six …
This particle range is identified as the most favorable size for copper flotation in several works conducted by the authors [49,50,51,52]. The sieve analysis of mill product …
flotation technologies: the HydroFloatTM separator for coarse particle recovery (>150 microns) and the StackCell TM to improve fine particle recovery (<15 microns).
In this paper the comparative effects of particle size on the flotation of two complex sulphide ores have been investigated. In addition to the effect of particle size on grades and …
INVESTIGATING THE POTENTIAL OF HYDROFLOATTM COARSE PARTICLE FLOTATION TECHNIQUES ON COPPER SULPHIDE ORES *P.J. Mehrfert1 1ALS Metallurgy 2957 Bowers Place Kamloops, Canada, V1S 1W5 ... Testing is often conducted by first classifying the feed sample to obtain a suitable particle size range for the HydroFloatTM device. This is generally a …
In this paper the comparative effects of particle size on the flotation of two complex sulphide ores have been investigated. ... Particle size on flotation performance of complex sulphide ores 725 TABLE 1 Comparison of Merensky (M) and UG2 (U) froth structures, based on a two-tailed paired t-test at a 95% significance level AGL SNE Stability M ...
:::~ 2 I 10 20 50 100 ~ and, hence, reduced flotation. On the other hand, the. detachment rate of already attached particles on the - PARTICLE StZE, Jim bubbles in turbulence is also likely to be reduced with, J Fig. . I Dependence of flotatIon . recovery of sphalcnte '.. on partICle sIze decrease dh in size. More important in determining
In these tests the best upgrading selectivity of copper sulphides was observed. It can be assumed that the milling time equals to 80 minutes is sufficient to obtain the highest upgrading selectivity of the examined copper ore. ... H, % 100 …
Copper distribution in locked particle vs. mean size fraction diameter d m Hp-chalcopyrite, Q-quartz, Py-pyrite, Hc-chalcocite 3.2. Degree of liberation and flotation Comparing of rougher ...
Numerous studies on copper slag flotation have been documented in the literature. Refs. [9,10] studied the recovery of copper contained in slag by flotation using sodium isopropyl xanthate as a collector and a particle size of less than 100 μm, obtaining a concentrate with a copper grade of 21% and a recovery rate of 80%. Ref.
The continuous development of the global economy has resulted in a high demand for copper production and high copper consumption [1], [2], and exploitation and effective use of copper oxide mineral resources have attracted attention [3].Copper oxide deposits evolve from shallow copper sulfide deposits after long-term oxidation, and they are widely and abundantly …
In the present study, an attempt is made to assess the feasibility of froth flotation of a complex sulphide ore, where the effect of liberation grade as well as depressant, collector and frother dosage was studied. Copper flotation is …
A kinetic study is presented to evaluate the performance of three commonly used frothers in the flotation of a massive copper sulphide ore at a fixed frother dosage. ... 49 Mining and Metallurgy EFFECT OF THE PARTICLE SIZE ON FLOTATION PERFORMANCE OF A SILICEOUS LIMESTONE SAMPLE D. S. Rao#, T. V. Vijaya Kumar, G. Bhaskar Raju and S. Prabhakar ...
The metallurgical performance of two industrial rougher flotation banks was characterized using particle size and mineralogical data for a copper sulphide mineral. This approach gives a better understanding of the whole flotation process than traditional approaches, as it is a useful tool for flotation circuit diagnosis and for improving the ...
Gold particles in an ore deposit will vary in size from large nuggets to particles locked in the crystal lattice of sulfide minerals. These sulfide minerals are referred to as gold carrier minerals and contain trace to minor amounts of gold (Taggart, 1927, Chryssoulis and Cabri, 1990).Often it is found that gold ores are refractory due to the small size of the gold …
In the second stage, influence of particle size distribution in different levels, the collector (Z11 + R407), and sulfidisation agent (NaHS) dosages were investigated on the floatability of mixed copper ore, and possible improvement of copper recovery ores was evaluated by a series of batch flotation experiments.
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As can be seen from Fig. 8 (a), in the copper-lead separation flotation, the values of SE present an initial increase and then a decreasing tendency with the continuous increase of particle size, and the maximum value of SE was obtained with the size fraction −74 + 58 μm, followed by the −43 + 20 μm size fraction and − 58 + 43 μm size ...
Copper sulphide grade vs. recovery obtained after 60, 80 and 100 minutes of milling. 2.2.2 Analysis of liberation results The comparison of the grain composition and liberation of sulphides in the flotation feed is presented in Fig. 5 and 6. Fig. 5. Particle size distribution in flotation feeds. As expected, the particle size decreases with ...
Results showed that the floated concentrate recirculation enhanced the metallurgical recovery, grade and rate flotation of copper sulphides. The best results were obtained with concentrate …
The copper ore in Chilean copper porphyry deposits is often associated with molybdenum minerals. This copper–molybdenum (Cu–Mo) sulfide ore is generally mined from various locations in the mining site; thus, the mineral composition, oxidation degree, mineral particle size, and grade vary. Therefore, in the mining operation, it is common to blend the ores …
The liberation of sulphides and the particle size of sulphides in flotation product were analysed and compared. ... [31]. Tenorite (CuO) is usually present in mixed copper oxide sulphide ore. The flotation properties of tenorite are similar to those of cuprite. ... Best results were achieved when hydroxamate was stage added to the rougher ...
It has been widely recognised that the grinding environment has a large effect on the flotation of sulphide minerals. This effect is attributed to a number of chemical mechanisms during grinding including Eh change, iron hydroxide coating on surfaces, oxygen reduction, precipitation from solution and galvanic coupling (Grano, 2009).Among these mechanisms, iron …
Benchmarking Performance of the Two-Stage StackCell™ with Conventional Flotation for Copper Sulfide Applications E.B Wasmund1 – Global Managing Director L. Christodoulou1 – Manager - Global Testing Services M. Mankosa2 – Executive Vice President - Global Technology E. Yan3 – Technical Director 1 Eriez Flotation Division Canada 7168 Venture Street,