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 ...

To achieve the depression of calcite in the flotation of valuable minerals (such as scheelite, smithsonite, apatite and fluorite, etc.), a series of depressants were reported, including sodium ...

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 this study, potassium oleate and potassium dihydrogen phosphate (KH 2 PO 4) ... thermodynamic calculations were used to rationalize the reasons for calcite depression as well as the ...

The main depressants for separating smithsonite and calcite by flotation are inorganic and organic depressants. Inorganic depressants mainly include sodium silicate (Na 2 SiO 3) and sodium hexametaphosphate ((NaPO 3) 6) (Changgen, 1983, Liao et al., 2022). Currently, sodium silicate is the most commonly used inorganic depressant in the …

Accordingly, flaxseed's soap, served as an efficient calcite collector in phosphate flotation while including phosphoric acid for apatite depression. It enabled the recovery of up to 95.7% ...

The micro-flotation experiment indicated that carboxymethyl chitosan had significantly depression effect on calcite but had a little influence on apatite at pulp pH 9.

@article{Derhy2024EnhancingSC, title={Enhancing selective calcite and dolomite flotation in the phosphate ores: Investigation, modeling, and automated mineralogy assessment}, author={Manar Derhy and Yassine Taha and Yassine Ait-khouia and Abdellatif Elghali and Mostafa Benzaazoua and Rachid Hakkou}, journal={Minerals Engineering}, year={2024 ...

The pH was maintained constant at 9.5. Three flotation processes were tested to separate calcite from the phosphate. Calcite was floated with 2.0 kg/t oleic acid using H3PO4 or H2SO4 (pH 5.5) as a phosphate depressant. Addition of 0.3 kg/t aluminum sulfate and 0.6 kg/t Na-K tartrate as a depressant, at pH 5.5 or 7.8, was also tested.

This work provided an effective way for the depression of quartz flotation in complicated flotation systems. ... subsequently applied to the flotation of calcite and dolomite. To elucidate the adsorption mechanisms of the frying oil collector (FrOC) and sodium oleate, a reference collector, on fluorapatite, calcite, dolomite, and quartz ...

One phosphorous rougher flotation, one bulk cleaner flotation and one carbonate reverse flotation at ore grind size of 86% passing 53 µm led to a phosphate concentrate assaying 28.68% P2O5, 12.06 ...

However, admittedly, the efficient depression of calcite remains a difficult subject in phosphate flotation process. Gum arabic (GA) is a kind of natural gum produced in the semi-desert region of Sub-Saharan Africa, which has a complex chemical structure of branched chains of (1−3)-linked D-galactopyranosyl containing L …

Depression of apatite is probably related to its instability in acid media. 3. Concentration of calcium/phosphate complexes increase with decrease of pH. 4. The detrimental effect of Ca ++, derived from carbonates, on the flotation of apatite minerals is mainly due to its effect on stabilization of apatites. 5.

Under the conditions of pH 8.0, styrene phosphonic acid (SPA) 80 mg/L, and HCA 6 mg/L, the flotation recovery of cassiterite and calcite was 82.01% and 19.18%, respectively, in the flotation ...

However, there are few studies related to depressants of gangue mineral calcite during apatite flotation. 2-Phosphonobutane-1,2,4-tricarboxylic acid (PBTCA) has also been studied as a calcite depressant in apatite flotation (Liu et al., 2019a), but the phosphate group of PBTCA will cause eutrophication of water bodies, and therefore will …

The way to successfully upgrade a phosphate ore is based on the full understanding of its mineralogy, minerals surface properties, minerals distribution and liberation. The conception of a treatment process consists of choosing the proper operations with an adequate succession depending on the ore properties. Usually, froth flotation …

Section snippets Experimental process. In order to explore the influence of the dosage of different depressants on the recovery of calcite, the flotation experiment was carried out, with the conditions being the collector dosage of 20 × 10-5 mol/L and pH = 7. The XMQ-ϕ240 mm × 90 mm ball mill and XFGC Ⅱ.5 laboratory flotation machine …

In the flotation process, dolomite and calcite are floated after depressing the phosphate by suitable reagents, such as phosphoric acid, sulfuric acid and fluosilicic acid [7], [8], [9]. When silica is the main gangue mineral, the silica, which exists as quartz or sand, is often floated by cationic collectors, whereas the apatite is depressed ...

1. Introduction. Phosphate is an incredibly important mineral resource that cannot be recycled and renewed in agriculture and has received increasing attention owing to its extended land use for rising biodiesel and food production (Sis and Chander, 2003, Cao et al., 2015).Flotation is an effective approach that can be used to selectively …

The flotation test results showed that 60 mg/L SMKL had a significant influence on depressing calcite flotation, while it had a slight effect on scheelite flotation. ... on calcite, monoammonium ...

P 2 O 5 and 0.8% MgO, with a 92% P 2 O 5 recovery from a feed containing 26.7% P 2 O 5 and 2.2% MgO. In the flotation of phosphate ores, fatty acids and their salts are commonly used as collectors ...

Up to now, no fewer than 50% of the marketable phosphate ore resources around the world are purified via flotation [4,16]. In the phosphate ore flotation, collectors are one of the most crucial ...

These minerals are. generally separated by flotation and/or magnet ic separation (in the case of iron impurities). Calcite ores typically contain metal sulphide, silicate, or other calcium ...

The maximum depression of calcite flotation occurs using 1.0×10âˆ'4 mol/L sodium carbonate at a pH of 7.5 where the flotation recovery of calcite decreases from 57.2% to 13.7%. An important point that should be noted is that the sodium carbonate acts as an activator agent and improves the flotation recovery of pyrolusite in all pH ...

The overall aim is to control the selectivity and recovery of the process. The following review is an attempt to add to previous works gathering phosphate froth flotation data. In that sense, the relevant parameters of phosphate ores flotation are discussed while focusing on apatite, calcite, dolomite, and quartz as main constituent minerals.

The results demonstrated a high selectivity for the flotation of calcite from fluorite using this new reagent schedule. ... minerals, II: Mechanisms of flotation depression of sulfide minerals by thioglycollic acid and citric acid. Miner. Eng. 2004, 17, 865–878. [Google Scholar] Sis, H.; Chander, S. Reagents used in the flotation of …

Mixed minerals flotation test results showed that an efficient separation of apatite from calcite was achieved using PBTCA as depressant, which presented a selective depression for the calcite. Zeta potential measurements indicated that the addition of PBTCA prior to NaOl did not interfere the interaction between NaOl and apatite while it ...

Two-stage reverse anionic flotation of carbonates (dolomite! calcite) has appeared to be a promising separation technique for the removal of carbonates from sedimentary rock phos­ phate. In reverse fatty-acid anionic flotation, the depression of phosphate mineral with orthophosphoric acid produces

This paper presents a comprehensive study on the selective flotation of a multi calcium-bearing minerals ore, focusing on the efficient removal of dolomite and calcite impurities from a carbonaceous sedimentary phosphate ore. Commercial fatty acid (FA) and phosphate ester collectors were investigated in a reverse flotation process, …

Apatite is the valuable mineral in phosphate ores. It is classified as a sparingly soluble salt-type mineral. A common group of minerals found with apatite as gangue are clay, dolomite, quartz and calcite [1, 2]. The flotation of phosphate ores containing siliceous gangue is successful due to the different surface properties of …

Selective flotation of bastnaesite from calcite with 2-ethylhexyl phosphate increased the bastnaesite grade from 52% to 95% without sacing recovery when compared to lauryl phosphate.