apatite and calcite separation by flotation

Calcite-Apatite Flotation

2004-2-4 · responsible for the decrease in flotation. 7. Flotation of apatite also was depressed by the supernatants of both calcite and apatite. 8. The effects of supernatants of calcite and apatite on ap-atite flotation is attributed to that of carbonate and phosphate species respectively. 9.

Frontiers | The Challenge of Tungsten Skarn Processing by ...

The flotation separation of scheelite from fluorite, apatite, and calcite has been intensively investigated over the past decades and remains, in the twenty first century, one of the most challenging problems in the froth flotation field.

Calcite Flotation in Potassium Oleate/Potassium …

2015-7-2 · Calcite flotation in acidic media is a difficult task due to the solubility of calcite and consequently the release of calcium ions in the flotation pulp. In addition, the interaction of calcium ions with the flotation reagents requires the correct selection of these reagents. In this study, potassium oleate and potassium dihydrogen phosphate (KH2PO4) were used as …

An Overview of Calcite Recovery by Flotation | SpringerLink

2020-9-23 · In some ores, calcite is present in moderate quantities along with silicates. In such cases, silicates or sulphides associated with calcite are floated using amine surfactants (Hanna 1975).All these experiments were performed at alkaline pH; if silicates or sulphides were present in the ores, these were floated before the separation of scheelite and calcite …

Effect of sodium pyrophosphate on the flotation …

2019-12-11 · In this study, the separation of calcite and apatite was achieved by the depressant sodium pyrophosphate (SPP). Microflotation results showed that when using 20 mg/l sodium oleate (NaOL) as the collector, apatite could be significantly depressed by ...

EFFECfS OF DISSOLVED MINERAL SPECIES ON THE …

2003-3-6 · the basis of their individual properties. Predictions for flotation separation based on single mineral tests often fail in these systems mainly owing to the interactions between dissolved mineral species. The effect of dissolved mineral species of the calcite-apatite system is investigated in this study using the electrokinetic technique.

Adsorption of sulfosuccinate collector on apatite and ...

2021-5-7 · A phosphate ore from the Catalão mine (Brazil) poses a challenge for apatite flotation from its carbonate gangue minerals. In recent developments, selectivity has been enhanced by using CO 2 instead of air. The adsorption of the sulfosuccinate collector on apatite …

Review of the Main Factors Affecting the Flotation of ...

For calcareous ores, separation by flotation of carbonates (calcite and dolomite) and phosphates is challenging since the two mineral groups share similar surface chemical properties. There are also colloidal phosphate ores, sedimentary ores containing, in general, a very small grain sized apatite (cryptocrystal).

Journal of Physics: Conference Series PAPER OPEN …

The flotation recovery of optic calcite at pH 9 with sodium oleate is higher than with sodium linoleate. At alkaline pH, apatite showed a better recovery with sodium linoleate. 1. Introduction The separation of salt type minerals such as apatite and calcite from silicates has been successfully carried out by flotation methods.

2020-9-1 · ,Jiao Fen,, Selective adsorption of sodium polyacrylate on calcite surface: Implications for flotation separation of apatite from calcite, :2013-09-04 :

(PDF) Effect of calcium concentration on calcite flotation ...

The flotation process currently considered for apatite concentration from the Santa Quitéria phosphate deposit (Brazil), involves bulk flotation of apatite and calcite with anionic collector at ...

Alizarin Red S as a Flotation Modifying Agent in Calcite ...

2003-2-28 · Flotation of calcite and apatite Flotation results obtained for calcite and apatite with oleate are given in Figs. 5 and 6. Calcite shows a sharp drop in flotation between pH 8 and 10; while elsewhere in the tested pH range, flotation is more than 95%. The flo-tation of apatite, on the other hand, is nearly between pH 6 and 12, with

Flotation of Dolomite from Apatite

2018-6-29 · selectively depress the flotation of apatite, thus realizing the separation of apatite from dolomite. Further, the selective depression mechanism of NaPP was studied through zeta potential measurements, contact angle measurements, and X-ray photoelectron spectroscopy (XPS) analysis. The results demonstrated that

An Alternative Flotation Process for Apatite …

2020-10-13 · Calcite flotation –Coarse fraction Effectof the collector dosage –Float Mineralogical composition 75 100 93,1 90,8 89,9 86,3 Mineral (%) Quartz Apatite Calcite 0 25 50 200 300 400 500 1,4 1,1 1,2 1,1 2,0 3,2 4,4 9,6 Coconut soap (g/t)

Selective adsorption of sodium polyacrylate on calcite ...

2020-6-15 · In the flotation separation of apatite and calcite, fatty acid collectors are adsorbed on both mineral surfaces owing to the presence of the same calcium ions on the cleavage planes,, . Therefore, the floatability of both minerals is excellent and the flotation selectivity is very low.

Apatite Froth Flotation Using Pequi''s Yellow Pulp Oil as ...

2020-1-8 · The hydrophobicity studies show that the selective separation of calcite and apatite can be obtained by using jojoba oil at a pH below 7.0. In this condition, the apatite is hydrophilic and calcite is hydrophobic, allowing their separation through froth flotation. Pequi, Caryocar brasiliense, is an oleaginous fruit with a strong and distinctive ...

(PDF) Investigation of the Mechanism of …

The acidic flotation process of carbonates at pH 4.5-5.0 followed by a direct phosphate flotation uses phosphoric acid as depressor of apatite during carbonate flotation. The mechanism of apatite ...

Effect of calcium concentration on calcite flotation from ...

2020-10-13 · Apatite, calcite, quartz, graphite The separation of apatite from calcite by flotation is extremely difficult due to similarity in the surface physicochemical properties for both minerals Santa Quitéria INB and Yara

Flotation selectivity of novel alkyl dicarboxylate ...

Flotation selectivity of novel alkyl dicarboxylate reagents for apatite-calcite separation

Improvement of calcium mineral separation contrast using ...

The flotation separation of salt type calcium minerals is problematic, due to the similarities in their same active Ca 2+ related site for interaction with anionic collectors and similar physicochemical characteristics such as solubility, zero-point charge, surface speciation and Ca-site density. The work was performed to achieve effective and selective separation of the calcium-minerals …

Selective adsorption of sodium polyacrylate on calcite ...

Flotation separation of apatite from calcite could be achieved with PAAS. Abstract. In this study, the selectively depression effect of sodium polyacrylate (PAAS) on the flotation separation of apatite from calcite was studied. The floatability of apatite and calcite in the absence and presence of depressant PAAS using sodium oleate (NaOL) as ...

Effect of calcium concentration on calcite flotation from ...

2018-8-8 · Apatite, calcite, quartz, graphite The separation of apatite from calcite by flotation is extremely difficult due to similarity in the surface physicochemical properties for both minerals Santa Quitéria INB and Yara

The flotation separation behavior of apatite from calcite ...

Moreover, both apatite and carboxymethyl chitosan are negatively charged, strong electrostatic repulsive force and steric hindrance between carboxymethyl chitosan and apatite also make the carboxymethyl chitosan adsorb on apatite surface more difficult. These adsorption differences lead to the flotation separation of the two minerals.

The flotation separation behavior of apatite from calcite …

2020-12-1 · The flotation separation behavior of apatite from calcite using carboxymethyl chitosan as depressant Minerals Engineering ( IF 4.765) Pub Date : 2020-12-01, DOI: 10.1016/j.mineng.2020.106635

Reprinted from Beneficiation of Phosphates. Advances in ...

2004-2-4 · calcite and apatite is 9.3. Above this pH apatite is less stable than calcite and hence conversion of apatite to that of calcite can be expected in the cal-cite-apatite system. Similarly, apatite is more sta-ble than calcite below pH 9.3. For calcite-dolomite and apatite-dolomite systems the singular points occur at pH 8.2 and 8.8, respectively.

The flotation separation of barite-calcite using sodium ...

2019-1-23 · separation of specific components, such as celestite, fluorite and calcite, gypsum and calcite, and apatite and calcite, with good results (Saitoh et al., 2007; Shariati et al., 2011); these results support the idea that the separation of the two minerals barite and calcite may be realized by applying SDS. Therefore, a

Effect of sodium pyrophosphate on the flotation …

Download Citation | Effect of sodium pyrophosphate on the flotation separation of calcite from apatite | In this study, the separation of calcite and apatite was achieved by …

Improved Flotation Separation of Apatite from Calcite with ...

Apatite (Ca10(PO4)6F2) is the most important phosphate mineral, and flotation is the main beneficiation method to separate apatite from its major gangue mineral calcite (CaCO3).

2018-12-9 · Different Flotation Performance of Ultrafine Scheelite under Two Hydrodynamic Ca 2018-11-21 Separation of Oxidized Pyrrhotite from Fine Fraction Serpentine 2018-11-20 Effect of depressants in the selective flotation of smithsonite and calcite usin 2018-11-20

Effects of Metal Ions on the Flotation of Apatite ...

The effects of Ca2+, Mg2+, Al3+, and Fe3+ 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 …

Effect of sodium pyrophosphate on the flotation …

2020-7-1 · In this study, the separation of calcite and apatite was achieved by the depressant sodium pyrophosphate (SPP). Microflotation results showed that when using 20 mg/l sodium oleate (NaOL) as the collector, apatite could be significantly depressed by 120 mg/l SPP, and calcite remained floatable at pH 6.5–9.3.

Selective adsorption of sodium polyacrylate on calcite ...

2020-12-1 · The sample of apatite and calcite were purchased from Ye''s Mineral Specimen Group, Guangdong Province, China and the high purities were confirmed by the X-ray diffraction (XRD) analysis and chemical composition analysis (shown in Fig. 1 and Table 1).The apatite contained 39.37% P 2 O 5 and calcite contained 55.98% CaO indicating the purity of hydroxy …

FLOTABILITY STUDIES OF THE MINERALS APATITE, …

2015-8-12 · these minerais that are presenl in carbonated Brazilian phosphate rocks and are concentrated by froth flotation. 2-MATERIALS AND METHODS ln this work mineral samples of apatite, calcite and dolomite were used in lhe size range from 147 to 44Jlm. Their chemical compositions are presenled in Table II.

"Investigation of the Mechanism of Apatite/Carbonates ...

The separation of phosphate from carbonate gangue using flotation is extremely complex due to the similarities in surface properties. The acidic flotation process of carbonates at pH 4.5-5.0 followed by a direct phosphate flotation uses phosphoric acid as depressor of apatite during carbonate flotation. The mechanism of apatite depression is rather hypothetical because of …