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The study has a specific focus on the impact of flocculants and coagulants as dewatering reagents present in recycled process water on solids recovery, water recovery, copper and nickel mineral recovery, copper and nickel mineral grade, residual concentrations of the collector post flotation are also determined as well as particle …
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The stronger the hydrophobicity of the particles, the greater the effect in stabilizing the froth [21], depending on the particle size and concentration. 300 250 200 O 150. lOO 50 O E 0 20 45 64 90 Particle Size, Fig.5 Variation in water recovery with particle size fraction for Merensky (M) and UG2 (U) ores. 40 35 30 25 "d" 20 O 15 10 5 0 0 20 ...
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The effect of microwave treatment on the grinding and flotation performance of a typical copper–nickel sulfide ore was evaluated, based on the determination of its microwave absorption capability, grinding and flotation indexes such as crack percentage, mineral liberation degree, particle size distribution, relative work …
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Nowadays, particle size is often measured and controlled in flotation concentrators. In this study the dependence of the froth structures on the particle size variation was investigated on the batch flotation of a sulfide ore from the Merensky reef in South Africa, and the size by size recovery curves were studied as well.
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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 …
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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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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 …
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classical mechanical tank flotation exhibits a kind of pass-band behavior with respect to particle size. Flotation is effective in the middle decade, but decays quickly for large …
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Results of the open cleaner flotation test performed using a blend of Ore A:Ore B (50:50) under optimum flotation conditions (3000 g/t MBS, 1000 g/t Na 2 S, 180 g/t 3418A + SIPX in copper flotation and …
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The results showed an optimum flotation condition at dosages of 80 g/t, 30 g/t, and 150 g/t of collector, frother, and dispersant respectively with copper recovery …
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It has been widely reported that the flotation of fine sulfide mineral particles is more adversely affected by electrochemically active grinding media, such as forged or mild steel grinding media ...
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The most common copper sulfide flotation collectors are the hydrogen sulfide (-SH) class, also known as thiols, sulfhydryl group, or mercapto group (C-S). ... The particle size reduction during the milling process gives rise to many types of surfaces with high activity, which, together with the release or inclusions of active components such as ...
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This particle range is identified as the most favorable size for copper flotation in several works ... rate constant flotation on particle size. ... in a high pyritic copper sulfide ore ...
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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 …
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The experimental study on the grinding of two copper sulphide ores using the Magotteaux mill followed by batch flotation of the grinding product in the Magotteaux cell showed that the grinding environment has some influence on electrochemical parameters of the prepared pulp, particle size distributions of solid mass and Cu-metal …
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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 ...
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To cite this article: A. Hassanzadeh & F. Karakaş (2016): The kinetics modeling of chalcopyrite and pyrite, and the contribution of particle size and sodium metabisulfite to the flotation of copper complex ores, Particulate Science and Technology,
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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 ...
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9 Behaviour of pulp potential on recovery of gold for different particle size and different proportion of MBT during bench scale flotation tests conducted with auriferous sulphide ore at pH of 6.3 and a total MBT plus PAX concentration of 60 g t21 Mineral Processing and Extractive Metallurgy (Trans. Inst. Min. Metall. C) 2006 VOL 115 NO 2 105 ...
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In flotation, a particle's lower size limit varies for different minerals [39], and some studies have reported good recovery of ultrafine particles [24, 43]. Michael et al. [35] reported the effects of particle size on the distribution of copper to froth and tailings …
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The formulation and use of mixed collector suites in sulphide flotation can be traced back as far as 1957 with the work of Glembottskii and his co-workers in Moscow. ... Of these two suites, the xanthate-dithiophosphate mixture delivered the best performance, with a copper recovery gain of approximately 4.1% at a slightly higher …
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freshly prepared reagent solutions were used. Distilled water was used in all flotation experiments. Fig.1. X-ray diffraction pattern of the nickel-copper sulphide ore sample Table. 1. Chemical composition of the nickel-copper sulphide ore (mass fraction, %). Component Ni Cu Co Fe MgO SiO 2 SG % 12.61 0.71 0.17 47.04 0.13 10.60 4.38
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In some cases, certain mineral ores must be ground to very fine particles because of the decrease in the grade and the increase of complex ores. Under actual …
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1. Introduction. 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 …
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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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Sulphides recovery vs. grade in particle size in range of 40-71 um liberated in 0-20% (locked particles) obtained after 60, 80 and 100 minutes of milling.
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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' …
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The dewatering of tailings is one of the serious challenges that the mining and mineral processing industries have encountered internationally. Solid–liquid separation methods are applied to wastewater, which generally consists of fine particles and water; fine particles are settled in thickeners by the flocculation method and the cleaned water is …
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Optimization of the operating density and particle size distribution of the cyclone overflow to enhance the recovery of the flotation of copper sulphide and oxide ...
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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 …
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1. Background. The application of flotation on a reasonable scale within the gold-mining industry commenced in the early 1930s following the introduction of water-soluble flotation collectors (specifically xanthates and dithiophosphate collectors) that allowed differential flotation of sulfide minerals (Weinig and Carpenter, 1937, Rabone, …
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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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Pyrite was the main sulfide gangue mineral (3.6wt%) in the concentrates. A 95% degree of liberation with d80 > 80 µm was obtained for chalcopyrite as the main copper mineral in the ore sample. The recovery rate and the grade in the concentrates were enhanced with increasing chalcopyrite particle size.
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Bench scale flotation tests with the Nussir sulfide ore were performed by varying particle size, flotation time, pH, and collector concentration with the S 3 sample. Initial copper recovery for the samples from both the panels as a function of particle size is presented in Figure 2. With increase in grind size from –150 µm to –250 µm, a ...
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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.
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Research Highlights In flotation, fine galena and chalcopyrite are affected by iron oxidation species emanating from grinding media to a much greater extent than intermediate size fractions. Grinding conditions have a more pronounced effect on fine galena flotation than fine chalcopyrite flotation. Fine particles are more easily oxidised …
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Three different milling time of copper ore in laboratory ball mill was applied. The flotation results were presented as the recovery-recovery and grade-recovery upgrading curves. …
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The results showed an optimum flotation condition at dosages of 80 g/t, 30g/t, and 150 g/t of collector, frother, and dispersant respectively: with copper recovery of more than 60% and a...
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Carrollite is best recovered at a narrow size range (20–45 µm), minimal at > 100 µm. ... The upper particle size limit for optimum flotation recovery depends on the overall mineral …
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The link between particle size and entrainment has been well-documented [32], [18], [25]. From Table 1, the comparison of the particle size distributions of the three particle sets shows that sets B and C have similar distributions at the fine end (d 10 and d 50), while set B shows a significantly larger d 80. This similarity at the fine end of ...
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