Significance of liberation characteristics in the fatty acid flotation of Florida phosphate rock

Al-Wakeel, Mohamed I.; Lin, C.L.; Miller, Jan D.

doi:10.1016/j.mineng.2008.07.011

Cited by 15 publications

(8 citation statements)

References 9 publications

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“…However, there is a certain conflict between liberation and particle size for the beneficiation of fine-grained phosphate rocks because fine grinding is desired to achieve a higher liberation degree and the obtained fine particles will adversely affect the separation efficiency. On the contrary, the separation efficiency of coarse particle without adequate liberation is limited as well [35]. Therefore, the effective liberation of desired minerals as well as avoid overgrinding of ores is of great importance for the subsequent flotation process.…”

Section: Mineral Granularitymentioning

confidence: 99%

Review on Beneficiation Techniques and Reagents Used for Phosphate Ores

2019

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Phosphate ore is an important raw material for manufacturing fertilizers and phosphorous chemical products. While most of the phosphate resources cannot be directly treated as feed stock due to the low grade of P2O5 and high content of impurities. In order to obtain a qualified phosphate concentrate, the beneficiation of the low-grade phosphate ore is, hence, of great necessity. Many beneficiation techniques can be employed to upgrade the P2O5 grade of phosphate ores based on their characteristics in chemical composition and texture. The flotation process is most widely applied to balance the P2O5 recovery ratio and cost. In this review, the dominant techniques for the beneficiation of phosphate ores are introduced. Moreover, the factors that affect the flotation of phosphate ore, including the properties of mineralogy, flotation reagents (depressants and collectors) and flotation medium, were systematically analyzed.

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Section: Mineral Granularitymentioning

confidence: 99%

Review on Beneficiation Techniques and Reagents Used for Phosphate Ores

2019

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“…Moreover, it is well-known that apatite is the main valuable mineral in actual phosphate ore while the major carbonate and silicate gangue minerals are dolomite and quartz, respectively [15]. Therefore, to further understand the effects and mechanism of metal ions on the flotation of the phosphate ore, it was necessary to first explore the effects of metal ions on the flotation behaviors of apatite, dolomite, and quartz, separately.…”

Section: Introductionmentioning

confidence: 99%

Effects of Metal Ions on the Flotation of Apatite, Dolomite and Quartz

et al. 2018

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Abstract:The effects of Ca 2+ , Mg 2+ , Al 3+ , and Fe 3+ on the flotation behaviors of apatite, dolomite and quartz were investigated through a micro-flotation test, and the influence of calcium ions on the flotation of these minerals was further elucidated by solution chemistry study, zeta potential measurement, and X-ray photoelectron spectroscopy (XPS) analyses. The results indicate that an appropriate amount of Ca 2+ and Mg 2+ can improve the floatability of apatite but had a negligible effect on the flotation performance of dolomite, whereas Al 3+ , Fe 3+ , and excessive amounts of Ca 2+ decreased the recovery of apatite and dolomite. The studied metal cations can activate quartz at a particular pH. It can be inferred from solution chemistry and zeta potential measurement that the influence of metal ions on the flotation of different minerals should be attributed to the adsorption of various hydrolysis species on the mineral surfaces. XPS analyses reveal that calcium ions can enhance the adsorption of anionic collector on apatite and quartz surfaces, and there are no apparent changes to be observed on the surface of dolomite in the absence and presence of calcium ions at a concentration of 2.5 × 10 −3 M, which was in good agreement with the micro-flotation results.

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“…A high concentration of sulfate ions (SO 4 2– ) also exists in the process water of sulfide flotation plants owing to either oxidization of sulfide or addition of zinc sulfate and copper sulfate as deactivator and activator in the case of sphalerite flotation . When a recycled water stream with a high concentration of calcium (Ca 2+ ) and sulfate (SO 4 2– ) ions is incorporated in the process, potential precipitation of calcium sulfate dihydrate (CaSO 4 ·2H 2 O, referred to as gypsum hereafter) on both desired sulfide minerals and silicate gangues makes both mineral surfaces of the same surface characteristics, thus decreasing the selectivity and flotation recovery. , A basic understanding of the interactions between gypsum precipitates, silicates, and sulfide surfaces is greatly needed, not only for sulfide minerals flotation but also for many other industrial operations with gypsum and silicates involved in aqueous media …”

Section: Introductionmentioning

confidence: 99%

Understanding the Deposition and Surface Interactions of Gypsum

2011

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Using a surface forces apparatus (SFA) and an atomic force microscope (AFM), we have studied the deposition of gypsum on a silicate mineral (mica) and their surface interactions. An exponential forceÀ distance repulsion relation was obtained for two rough (gypsum) crystal surfaces with root-mean-square (rms) roughness between 4 and 200 nm on approach and separation after the initial contact. The effective surface energies were estimated as γ eff = 32.8 and 7 mJ/m 2 for gypsum surfaces with an rms roughness of ∼8 and ∼100 nm, respectively, which increase with a decrease of the rms roughness, approaching the thermodynamic value ∼48 mJ/m 2 estimated by a three-probe-liquid contact angle measurement. The repulsive force observed for rough gypsum surfaces was found to be a mainly elastic force due to asperity interactions. The surface forces measured between two silicate mineral surfaces (mica) in CaSO 4 solutions were fitted well by the DerjaguinÀLandauÀVerweyÀOverbeek (DLVO) theory at low concentrations (10 À4 À10 À2 M) but deviated at higher concentration. Our results have provided insight into the basic surface interaction mechanisms of gypsum and silicates in many mineral flotation processes and industrial operations.

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Significance of liberation characteristics in the fatty acid flotation of Florida phosphate rock

Cited by 15 publications

References 9 publications

Review on Beneficiation Techniques and Reagents Used for Phosphate Ores

Review on Beneficiation Techniques and Reagents Used for Phosphate Ores

Effects of Metal Ions on the Flotation of Apatite, Dolomite and Quartz

Understanding the Deposition and Surface Interactions of Gypsum

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