— The flotation of nickel sulfide ore having serpentine and talc as the main gangue minerals, is severely affected by features such as, containment and sliming. If the MgO content is greater than a certain percentage (typically 6.8%), the melting point and viscosity of the slag increases, thus resulting in higher operating temperatures, and ...
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— The flotation by surface sulphidisation of the oxidized copper-cobalt-bearing ore from Kimpe (1.97% Cu; 0.66% Co) was studied in order to evaluate its behavior by the analysis of its most ...
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— The extraction of nickel (Ni) from sulfide resources commences with flotation to produce a concentrate which is then smelted to produce a nickel-enriched phase called matte, and further refined to ...
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— The nickel grade versus recovery curves are shown in Fig. 4. It can be seen that with the increase of nickel recovery, the grade of nickel decreased. The High Intensity Conditioning method produces a vastly superior nickel grade-recovery relationship. These results confirm that the use of HIC improves the flotation performance of this ore greatly.
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— The latter may be problematic when intergrown inclusions of pentlandite or nickel in solid solution are present (Rao, 2000). Rejecting hexagonal pyrrhotite may be achieved by (i) staged flotation ...
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— Fine grinding should be used to liberate nickel-containing particles in laterite ores. •. Reactor–separator cell with more probability of particle–bubble attachment can …
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— In this study, the effect of purifying the nickel concentrate thickener overflow water with DAF on the metallurgical performance of nickel flotation was investigated. …
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— A South American nickel mine has been producing a nickel concentrate that also contains copper and iron (15 percent nickel, 5 percent copper, 28 percent iron) for the end use of stainless steel production. A critical specification for the quality of the steel is the iron to magnesium oxide ratio (Fe:MgO), with a ratio of below 3.5:1 having a substantial …
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— Nickel ore dispersion before flotation using different reagents was investigated on a bench scale to improve metallurgical recovery and selectivity. The nickel ore had a …
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— The nickel flotation recovery was found to decrease with increasing levels of water dilution. In fact, the best overall performance was achieved for the as received feed at a solids concentration of 31 wt% solids. It is noted that due to a very high level of dissolved solids, the actual concentration of the solids was 35 wt%. ...
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— Bulk flotation is generally performed at around pH 9, while Cu-Ni separation is performed at higher pH, around 11. In some cases, flotation is operated at saturated lime pH condition (i.e. pH > 12) to strip the collector from the surface of pentlandite. Cyanide or dextrin can also be used to help depress pentlandite (Lawson et al., 2014). The ...
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— The dosage of a collector is an important factor that determines the efficiency of a froth flotation process. The representative sample of the carbonatitic Palabora copper ore ground 45 % passing 75 µm was froth-floated with sodium isobutyl xanthate (SIBX) collector at 60, 70, 80, 90 and 100 g/t dosages. The concentrates and tails were dried …
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— In this study, upgrading nickel by flotation in three laterite ore samples, limonite, saprolite and intermediate, from different geology zones, was investigated. It was possible to upgrade the nickel grade in the saprolite sample by about 40% at more about 70% recovery using a hydroxamate collector at pH 10. These grade and recovery results …
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— Nickel flotation is a very complex industrial process with hundreds of data parameters throughout the production of nickel ore flotation, and there is often a strong coupling between these parameters and variables, and even a lot of repetitive information between these variables. If these data are used directly in the modelling, the algorithm ...
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Nickel; cobalt; pentlandite; nickel sulfides; hydrometallurgy 1. Introduction The extraction of nickel from sulfidic resources was described in Part I where it was shown that direct hydrometallurgical processing of nickel sulfide flotation concentrates has several distinct advantages over pyro-metallurgy.
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— and nickel pig iron (NPI), or higher purity class 1 (>99.8% Ni) nickel such as nickel powder, briquettes or electrowon cathode (Campagnol et al. 2017). Campagnol et al. (2017) have indi-cated that demand for class 1 nickel in the form of high purity nickel sulfate for lithium-ion batteries is expected to reach
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— The separation of copper and nickel is achieved by differential flotation, if the mineral grains can be liberated by grinding. Normal practice is to depress the nickel sulfides by increasing the pH of the flotation pulp to between 9 and 11 and selectively floating the copper minerals. The Duluth Gabbro Complex ores are unique in that they ...
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— Nickel ore dispersion before flotation using different reagents was investigated on a bench scale to improve metallurgical recovery and selectivity. The nickel ore had a content of 0.8 pct nickel and 14.5 pct MgO. A positive linear correlation between MgO and Ni was found. Carboxy methyl cellulose, both pure and combined with Na2CO3, was the …
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— addition on flotation performance of a nickel sulphide ore. The objectives of the study were to: 1. develop an understanding of the effects of collector and depressant dosage, and its interactive effects, on flotation performance and 2. determine the effect of stage dosing collector and depressant on flotation
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The overall economics and suitability of the process relies on the total nickel recovery, whereas the flotation performance should be assessed on the recoverable nickel, which is approximately 80% of the total nickel. The flotation results indicate that the flotation process is selectively upgrading the nickel sulphides, with the highest-grade ...
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DOI: 10.1016/S0301-7516(01)00061-8 Corpus ID: 94837960; Flotation and surface analysis of the nickel (II) oxide/amyl xanthate system @article{Naklicki2002FlotationAS, title={Flotation and surface analysis of the nickel (II) oxide/amyl xanthate system}, author={Mark L. Naklicki and S. Ramachandra Rao and M. G{'o}mez and James A. …
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This study aimed to investigate new hydrodynamic approaches to improve nickel flotation, focusing primarily on unrecovered nickel from a Western Australian tailings stream. …
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— These agents help create a stable froth layer at the surface of the flotation cell. 5. Flotation: The conditioned slurry is introduced into flotation cells, where air bubbles are injected. The ...
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The flotation of nickel sulphide minerals is normally difficult in the presence of serpentine minerals due to the coating of serpentine particles on the nickel mineral surface. To improve the ...
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— The process exploits the particle size dependence of nickel sulphide flotation and the different ways that pH change and pulp density influence the response of coarse and fine particles. Implementation of the new process at Mt Keith has raised nickel recovery by 10%. In turn, nickel production has increased by over 6000 t.p.a. and the net ...
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— One potential source for cobalt and nickel are low-grade nickeliferous pyrrhotite tailings, of which 50–100 million tonnes are present in the Sudbury area alone. This paper presents the extraction of cobalt and nickel from this material using a combination of flotation and bioleaching technologies. The findings of a high-level …
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— A nickel-copper sulfide system usually coexists with serpentine in deposits. Low nickel-copper recovery and high content of serpentine in concentration adversely affects subsequent metallurgical processes. In this study, test data showed different rheological results at various densities. When the solid ratio of sulfide to serpentine was …
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— 1. Introduction. Pentlandite flotation in Western Australia has historically been difficult due to a low nickel grade and large amounts of serpentine minerals (Senior and Thomas, 2005).The hypersaline water used in the flotation plants makes the traditional serpentine dispersants ineffective (Wellham et al., 1992).In the past 10 years, many …
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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 index (RWI), metal …
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— Highlights High temperature experiments demonstrated that selective sulphidation is feasible. Sulphides were submicron in size but could be physically upgraded. Nickel sulphides responded to flotation and grades of 6–8% were achieved. Low nickel grade was due to fine particle entrainment. Low nickel recovery was due to issues with …
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— The extraction of Ni from sulfide ores is much simpler relative to laterites and is dominated by pyrometallurgical processing. This typically involves comminution and flotation to produce a nickel ...
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Froth flotation is widely used for concentration of base metal sulphide minerals in complex ores. One of the major challenges faced by flotation of these ores is the ever varying grade and mineralogy. This therefore calls for a continual characterisation and optimisation of flotation parameters such that concentrator performance as a whole is always …
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Jan 20, 2021· Crushing grinding and flotation of nickel flotation recovery will be a strong function of the valuable mineral particle size distribution, circuits to crushingsemiautogenous grinding sball mill for a nickel sulfide ore crosbieet al, and b piston and die breakage versus. Coal Crushing Ball Mill Design yogaingreifswald de .
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