Pulp chemistry in industrial mineral flotation. Studies of surface complex on calcite and apatite surfaces using FTIR spectroscopy

Antti, Britt‐Marie; Forssberg, Eric

doi:10.1016/0892-6875(89)90042-3

Cited by 38 publications

(17 citation statements)

References 4 publications

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“…Moon and Fuerstenau [30] evidenced the formation of aluminum oleate at the spodumene (a lithium silicate) surface through the chemical interaction between the cationic aluminum surface sites and the carboxyl groups of sodium oleate, justifying the increased floatability of the mineral at pH 8. Several authors suggest the formation of calcium oleate at the apatite surface [37,41,43,45,46]. An analogous equation to the Eq.…”

Section: Microflotation Testsmentioning

confidence: 96%

Electrokinetic properties of wavellite and its floatability with cationic and anionic collectors

Nunes¹,

Peres²,

Araújo³

et al. 2011

Journal of Colloid and Interface Science

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The reverse apatite flotation with fatty acids has been widely used for the reduction of phosphorus content of magmatic origin iron ores. However, the occurrence of phosphorus intensely disseminated as secondary minerals such as wavellite renders the anionic reverse flotation a challenge. Zeta potential measurements and microflotation tests of wavellite with the use of anionic and cationic collectors were carried out in this work. The wavellite's IEP value was achieved at pH 4.5. Below the IEP value, the surface positively charged sites are made up of aluminum ions. The species H(+), Al(OH)(2)(+), Al(OH)(2+), Al(3+), OH(-), H(2)PO(4)(-), HPO(4)(2-), and PO(4)(3-) play a role in the protonation and deprotonation reactions that will determine the wavellite-solution interface properties. The highest values of wavellite's floatability under basic pH conditions were achieved in the presence of cationic collectors (1 × 10(-4) mol L(-1)). The formation of surface complexes and the precipitation of insoluble salt of aluminum onto wavellite surface seems to be the most likely hypothesis for the chemical nature interactions between amines and wavellite. The surface formation of aluminum oleate on the wavellite's surface seems to be the most probable hypothesis for the adsorption mechanism and the resultant high floatability of wavellite between pH 7.5 and pH 10.0 in the presence of sodium oleate (1 × 10(-4) mol L(-1)). The results showed that the cationic reverse flotation of secondary phosphates is a promising route to reduce the phosphorus content of iron ores from deposits that underwent a supergene enrichment process, since wavellite floatability in the alkaline pH range, using amine as collector, was not significantly affected by the presence of corn starch.

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Section: Microflotation Testsmentioning

confidence: 96%

Electrokinetic properties of wavellite and its floatability with cationic and anionic collectors

Nunes¹,

Peres²,

Araújo³

et al. 2011

Journal of Colloid and Interface Science

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show abstract

“…11. According to many researchers (Antti and Forssberg, 1989;Mielczarski et al, 1993;, the absorbance bands which can provide useful information about the nature of the adsorbed fatty acid such as oleic acid can be observed in two regions of frequency, i.e., (1) most peaks at wavenumbers from 3100 cm − 1 to 2900 cm − 1 are related to the hydrocarbon chain.…”

Section: Ftir Spectramentioning

confidence: 99%

Fatty acid collectors for phosphate flotation and their adsorption behavior using QCM-D

Kou

Tao

2010

International Journal of Mineral Processing

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“…Calcium dicarboxylate salt precipitated from bulk solution and carboxylate adsorbed under conditions where surface precipitation of the calcium dicarboxylate salt occurs are characterized by a splitting of the asymmetric vibration of the carboxylate group (5,6,10,20). Adsorption of this calcium dicarboxylate at semisoluble mineral surfaces occurs by physisorption because the characteristic doublet for calcium dicarboxylate does not shift upon adsorption and this adsorbed species can be easily washed away as reported by Gong et al (10) and by Free and Miller (5).…”

Section: Coordination Of Calcium Ions With Carboxylatesmentioning

confidence: 99%

“…n 1 and n 2 are the refractive indices of the denser and rarer media, and n 21 equals n 2 /n 1 . The number of reflections can be calculated from the IRE geometry and the incident angle of the IR beam as N = (1/t) cot θ, [6] where l and t are the length and thickness of the IRE, respectively, and θ is the incident angle of the IR beam.…”

Section: In Situ Ftir/irs Experimentsmentioning

confidence: 99%

Carboxyl Stretching Vibrations of Spontaneously Adsorbed and LB-Transferred Calcium Carboxylates as Determined by FTIR Internal Reflection Spectroscopy

Miller

2002

Journal of Colloid and Interface Science

242

171

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Pulp chemistry in industrial mineral flotation. Studies of surface complex on calcite and apatite surfaces using FTIR spectroscopy

Cited by 38 publications

References 4 publications

Electrokinetic properties of wavellite and its floatability with cationic and anionic collectors

Electrokinetic properties of wavellite and its floatability with cationic and anionic collectors

Fatty acid collectors for phosphate flotation and their adsorption behavior using QCM-D

Carboxyl Stretching Vibrations of Spontaneously Adsorbed and LB-Transferred Calcium Carboxylates as Determined by FTIR Internal Reflection Spectroscopy

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