Mechanism of oleate interaction on salt-type minerals, Part II. Adsorption and electrokinetic studies of apatite in the presence of sodium oleate and sodium metasilicate

Rao, K. Hanumantha; Antti, Britt‐Marie; Forssberg, Eric

doi:10.1016/0301-7516(90)90027-v

Cited by 72 publications

(20 citation statements)

References 20 publications

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“…Our results well correlate with the zeta potential reference data for natural HA [24,29,35,52]. On the other hand, Amankonah and Somasundaran [33] obtained the isoelectric point for synthetic hydroxyapatite at about 7.4, Smičiklas et al [76] at 6.1 ± 0.1, which is in agreement with some results reported in the literature for stoichiometric HA [27,28,74,77].…”

Section: Resultssupporting

confidence: 95%

“…Several models have been described to explain the nature of the adsorption of the long-chain surfactants at the solid/liquid interface depending on the experimental conditions [29,35,[84][85][86][87]. Thus, the treatment by Cases et al [85] assumes that the association of adsorbed ions forms two-dimensional aggregates (hemimicelles) due to strong lateral bonds.…”

Section: Resultsmentioning

confidence: 97%

“…1, 3, and 4. The references note that the conditioning times for flotation tests rarely exceed 10 min [31,33], but mineral suspensions may require even several hours and/or weeks for full equilibrium [23,33,35].…”

Section: Methods and Proceduresmentioning

confidence: 99%

“…Zeta potential can be used to delineate the interfacial phenomena in heterogeneous mineral suspensions [29,33,35,[48][49][50][51][52][53][54][55][56][57].…”

Section: Introductionmentioning

confidence: 99%

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Electrokinetic properties of hydroxyapatite under flotation conditions

Vučinić

Radulović

Deušić

2010

Journal of Colloid and Interface Science

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Section: Resultssupporting

confidence: 95%

Section: Resultsmentioning

confidence: 97%

Section: Methods and Proceduresmentioning

confidence: 99%

“…Zeta potential can be used to delineate the interfacial phenomena in heterogeneous mineral suspensions [29,33,35,[48][49][50][51][52][53][54][55][56][57].…”

Section: Introductionmentioning

confidence: 99%

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Electrokinetic properties of hydroxyapatite under flotation conditions

Vučinić

Radulović

Deušić

2010

Journal of Colloid and Interface Science

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“…When the NaOL dosage is 120 mg/L, both magnesite and dolomite can reach good recoveries (>90%). The high recoveries are due to chemisorptions of NaOL on the magnesite and dolomite surface [20]. The results in Figure 3 indicate that NaOL has a strong collecting powder on both magnesite and dolomite, so it is difficult to achieve the flotation separation of magnesite from dolomite without adding any depressant.…”

Section: Xps Measurementsmentioning

confidence: 99%

Elimination of the Adverse Effect of Calcium Ion on the Flotation Separation of Magnesite from Dolomite

et al. 2017

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Abstract:The separation of magnesite from dolomite was studied by flotation tests, X-ray photoelectron spectroscopy (XPS), and zeta potential measurements in the presence of calcium ion (Ca 2+ ) dissolved from dolomite. Sodium oleate (NaOL) was used as collector, and sodium carbonate (Na 2 CO 3 ) and sodium hexametaphosphate (SH) were used as regulators. The results showed that SH had a good selective inhibition ability in pure mineral flotations of magnesite and dolomite. While in the presence of Ca 2+ dissolved from dolomite, magnesite and dolomite were both inhibited by SH. The separation of magnesite from dolomite cannot be realized because Ca 2+ can adsorb on the surface of magnesite in the form of CaCO 3 and change the surface properties of magnesite. Thus, the magnesite flotation was depressed. When the sequence of reagent addition was changed to add SH prior to Na 2 CO 3 , a complex was made by Ca 2+ reacting with SH, which avoided the adsorption of Ca 2+ on the magnesite surface and prevented the changing of the magnesite's surface properties. Then, after adjusting the solution pH with Na 2 CO 3 , the flotation separation of magnesite from dolomite could be achieved.

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Rice starch as a depressant in phosphate reverse flotation

2015

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Depressants are essential additives, to increase the separation selectivity, in the reverse flotation of phosphate by fatty acid collectors. In the current study, the rice starch is used, as a phosphate depressant, in the reverse flotation of calcareous phosphate by oleic acid. The operating parameters affecting the starch depressing action such as: collector dosage, pH and starch dosage are studied using statistical design of experiments. The design analysis showed that the starch dose has the most significant effect on the concentrate grade. A concentrate containing 30.6% P 2 O 5 with a recovery of 91.6% was achieved at the optimum values of studied parameters, i.e., 4, 4 kg/t, and 4 kg/t for pH, starch dosage, and collector dosage, respectively. The FTIR analysis was used to characterize the interaction between the collector and starch as well as the starch and phosphate ore. It was found that the oleicore interaction was chemical, whereas the starch interaction with either phosphate or oleic acid was physical.

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Mechanism of oleate interaction on salt-type minerals, Part II. Adsorption and electrokinetic studies of apatite in the presence of sodium oleate and sodium metasilicate

Cited by 72 publications

References 20 publications

Electrokinetic properties of hydroxyapatite under flotation conditions

Electrokinetic properties of hydroxyapatite under flotation conditions

Elimination of the Adverse Effect of Calcium Ion on the Flotation Separation of Magnesite from Dolomite

Rice starch as a depressant in phosphate reverse flotation

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