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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.
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Carrollite is best recovered at a narrow size range (20–45 µm), minimal at > 100 µm. This upper size limit may be increased to some extent with higher collector dosage. Cobalt is mainly produced globally from Cu-Co sediment-hosted deposits in the Democratic Republic of …
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particles float more slowly than particles in a mid-size range. The size limits are not precise but for many mineral systems, the ultra-fines are those below 5–10 lm, and the coarse sizes are above 100 lm approximately. The flotation rate tends to decrease with decreasing particle size, because of the increasing importance of
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The total and acid soluble copper assays of the tail from Test D were 0.19% and 0.16% Cu, respectively. This shows that the residual copper found in the tail was mainly associated with copper oxide minerals. The total copper, sulphide copper and oxide copper recoveries of 95.5%, 98.2% and 89.4%, respectively.
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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.
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The study on potential control flotation of pyrrhotite-bearing copper sulfide ore was conducted, including the relationship among particle size, liberation with potential, CaO consumption(pH)with ...
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separating sulfide minerals from silica gangue (and from other sulfide minerals); separating ... flotation rate, particle size recovery, air flow, pulp density, etc.) As a result, it is difficult to ... Grade/recovery performance of a hypothetical copper ore flotation process. Product % Weight % Cu Assay Feed 100 2.09
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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 …
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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 …
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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 ...
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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 ...
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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 ...
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Pyrite was the main sulfide gangue mineral (3.6wt%) in concentrates in the first 20 s. The particle size of pyrite was in the range of 5 to 150 µm. As shown in Figs. 3(b) and 4(b), the order of the copper sulfide minerals' abundance in this concentrate was similar to that in the concentrate obtained in the first 20 s of processing time.
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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 ...
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In low-grade and complex copper ores, the specific gangue minerals present can vary depending on the ore deposit, and silicate minerals such as quartz, feldspar, and clay minerals are the most common [3, 8].Recently, amorphous silica, a non-crystalline form of silica with a relatively low particle density and complicated rheological properties, has garnered …
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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 …
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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 …
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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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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 …
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The sulfide mineral aggregate obtained after primary grinding was selected as the recovery object, and its mineralogical characteristics, such as liberation degree and particle size, were investigated to promote total recovery in primary flotation. The copper–cobalt sulfide concentration was obtained at the following optimal conditions: the ...
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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 ...
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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 …
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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.
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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 …
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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.
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Gulin Least News. horizontal mill for silica in europe » The More » crushing plant designs 300 tons per hour » electra washing machines company wikipedia » mobile installtion cost in mines » prices of mobile stone crushers » best particle size for copper sulphide flotation Contact Us. Tel: 86-21-58386256; Office Add: Pudong New Area, Shanghai, China. ...
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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 ...
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We conducted a 2⁴ factorial design on the main parameters that influence flotation performance. The results showed an optimum flotation condition at dosages of 80 g/t, 30g/t, and 150...
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Both industrial flotation data and many investigators suggest that the best results of flotation of ore minerals are observed for particle size range from 20 to 100 µm. Many base …
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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 …
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:::~ 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
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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 ...
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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 …
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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).
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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 …
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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 …
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