Flotation of pyrochlore from low grade carbonatite gravity tailings with benzohydroxamic acid

Gibson, Charlotte E.; Kelebek, Ş.; Aghamirian, M.; Yu, B.

doi:10.1016/j.mineng.2014.11.006

Cited by 28 publications

(5 citation statements)

References 14 publications

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“…Later, due to the complexity of several ores, few modifiers and depressants were employed to facilitate the flotation process. The commonly used modifier was sodium silicate (Prasad et al 1994;Jena et al 2013), sodium hexa-metaphosphate (Schubert et al 1990;Gibson et al 2015), and hydrated/ acidified sodium silicate (Zhou and Lu 1992;Martinez et al 2000). A few studies have also reported the unconventional depressants, such as cashew gum (Ribeiro et al 2003), when it was used as a depressant for calcite, and 70-80% calcite was recovered as tailings.…”

Section: Anionic Reagentsmentioning

confidence: 99%

An Overview of Calcite Recovery by Flotation

2020

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In general, precipitated calcium carbonate (PCC) is used as a mineral filler in paper industries; while natural calcite (CaCO3) ore is also suitable for industrial use if it is a finely ground high-grade material. Naturally, calcite is found in the form of high- or low-grade ores and it is one of the most widely distributed industrial minerals on the earth’s crust. However, it is rarely found in its pure form and is generally associated with other gangue minerals; the type and percentage of which vary from one deposit to another. These minerals are generally separated by flotation and/or magnetic separation (in the case of iron impurities). Calcite ores typically contain metal sulphide, silicate, or other calcium-containing impurity minerals, which can be removed by flotation. A tremendous amount of research has been performed on refining the flotation process for calcite ores and designing the reagents (specifically, collectors) to increase the efficiency of the process. Metal sulphide/silicate impurity minerals can be removed by the froth-flotation process using amines and xanthate collectors. Alternatively, fatty acids are used as collectors to float calcium-type minerals directly from the ore. This paper reviews the industrial practices and fundamental research related to collectors surrounding calcite ore flotation. This article presents and reviews collectors for the beneficiation of high-grade calcite ores which have been reported in the literature in order to assist judicial choice of collecting agents in flotation.

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Section: Anionic Reagentsmentioning

confidence: 99%

An Overview of Calcite Recovery by Flotation

2020

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“…Alkyl or alkaryl hydroxamic acids and their salts are well-known collectors for the froth flotation of oxide minerals such as scheelite [ 19 ], rhodochrosite [ 20 ], malachite [ 21 ], pyrochlore [ 22 ], monazite [ 15 ] and cassiterite [ 23 , 24 ]. However, it has not been reported regarding the effect of Ca 2+ , Mg 2+ and Fe 3+ on cassiterite flotation when octanohydroxamic acid (OHA) is used as the collector.…”

Section: Introductionmentioning

confidence: 99%

Inhibition mechanism of Ca ²⁺ , Mg ²⁺ and Fe ³⁺ in fine cassiterite flotation using octanohydroxamic acid

et al. 2018

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The existence of metal ions should not be ignored in both hydrometallurgy and flotation. In this study, the effects of Ca2+, Mg2+ and Fe3+ on the flotation performance of cassiterite using octanohydroxamic acid (OHA) as the collector were investigated by micro-flotation tests, X-ray photoelectron spectroscopy (XPS), Fourier transform infrared (FTIR) spectroscopy, contact angle, zeta (ζ) potential measurements and atomic force microscopy (AFM) imaging. The results of the flotation and contact angle experiments showed that the addition of Ca2+, Mg2+ and Fe3+ significantly decreased both the recovery and contact angle of cassiterite with pH ranged from 6.0 to 12.0 in the presence of OHA collector. ζ-Potential measurements, solution chemistry analysis and FTIR measurements indicated that the flotation recovery of the cassiterite declined due to the CaOH+, MgOH+ and Fe(OH)3 sites on the cassiterite surface. XPS results indicated that the chemisorption of OHA and calcium ions on the cassiterite surface finally changed its chemical properties. The AFM images also revealed that new species Fe(OH)3 of Fe3+ formed and adsorbed on the cassiterite surface at pH 9.0. The adsorption of Fe(OH)3 reduced the adsorption of OHA on the cassiterite surface, thus the hydrophobicity of cassiterite was deteriorated.

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“…Recent studies show that the re-treatment of low-grade tailings is seen as a way of conserving minerals with the global emergence of the thought of a circular economy, and it can be harnessed with economically efficient techniques (Gibson, et al, 2023).…”

Section: Introductionmentioning

confidence: 99%

Optimization of flotation conditions in the beneficiation of PGMs tailings

Hlotse,

Mbaya,

Shongwe

2023

Physicochem. Probl. Miner. Process.

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For several years, mining waste has shown a negative impact on both the environment and human health. The mining industry remains the backbone of the economic growth. Different technologies have been implemented to beneficiate and recover platinum group metals from tailings. The recycling of tailings has been a point of research interest due to their extensive applications. Flotation has been the primary process of upgrading and recovering PGMs. The focus of this study was to optimize flotation conditions in the beneficiation of PGMs for particular small-scale mine tailings. This was done to obtain the most favourable conditions for the small-scale mine tailings to improve operating conditions of specific particle sizes. PGMs tailings obtained from a small-scale mine were characterized using XRD, XRF, SEM/EDS, and ICP – OES to understand the properties of the tailings prior to mineral processing. Flotation batch tests were conducted. The results showed that the chosen particle size was 75 µm, and the favorable reagent dosages were 150 g/Mg and 100 g/Mg for SIBX (collector) and Starch(depressant), respectively. At favourable conditions, the recovery was 65.75% (Pt = 70.38%, Pd = 59.33%, Ru = 34.56%), and the grade was 31.46 g/Mg (Pt = 21.43 g/Mg, Pd = 9.62 g/Mg, Ru = 0.41 g/Mg). It can be concluded that all the flotation parameters are related; lower particle sizes yield high recoveries and better grades due to the exposure of the particle surface to the reagents responsible for the flotation of the PGMs. It was observed that the high collector dosages produce high recoveries with low grades of PGMs. High depressant dosages produce low recoveries with high grades of PGMs. The relationship between the collector and the depressant is of essential importance in the flotation process.

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Flotation of pyrochlore from low grade carbonatite gravity tailings with benzohydroxamic acid

Cited by 28 publications

References 14 publications

An Overview of Calcite Recovery by Flotation

An Overview of Calcite Recovery by Flotation

Inhibition mechanism of Ca ²⁺ , Mg ²⁺ and Fe ³⁺ in fine cassiterite flotation using octanohydroxamic acid

Optimization of flotation conditions in the beneficiation of PGMs tailings

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Flotation of pyrochlore from low grade carbonatite gravity tailings with benzohydroxamic acid

Cited by 28 publications

References 14 publications

An Overview of Calcite Recovery by Flotation

An Overview of Calcite Recovery by Flotation

Inhibition mechanism of Ca 2+ , Mg 2+ and Fe 3+ in fine cassiterite flotation using octanohydroxamic acid

Optimization of flotation conditions in the beneficiation of PGMs tailings

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Inhibition mechanism of Ca ²⁺ , Mg ²⁺ and Fe ³⁺ in fine cassiterite flotation using octanohydroxamic acid