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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, assessing …
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The flotation of dolomite and apatite minerals against the pH range of pH 4.8–9.5 is presented in Fig. 8 at 150 mg/L of collector concentration in the presence of H 3 PO 4 and CaO to both adjust the pH and depress apatite. Evidently, there is a considerable difference between the floatability of the two minerals at acidic and neutral pH but ...
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Although reverse flotation efficiently separates magnesite from quartz [4,5,7], separating magnesite from dolomite via froth flotation is challenging because the two minerals possess analogous ...
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speed of 1800 rpm, Figure 2 presents the schematic of XFG‐II flotation machine [11,12]. As for the single mineral flotation, the procedure was described as follows: firstly, 2 g of flu‐ orapatite/dolomite was added in the flotation cell with 50 mL pure water, and then stirred 2 min for dispersion.
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The flotation results indicated that, when sodium oleate (NaOl) was used as the collector, HEDP displayed an outstanding depression effect on the dolomite flotation, whereas it had only a slight ...
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dolomite and apatite flotation has been studi ed [Rao, 1985]. It was shown that sodium . chloride acts as apatite depressant during fl otation at acidic pH values with oleic acid,
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One recent idea is that the ordered arrangement of calcium and magnesium atoms in the dolomite structure does not form during precipitation. Rather, calcium- magnesium carbonate precipitates in a disordered manner, and then order emerges from a slow maturation process on a geological timescale (6, 7).The surface of the initial …
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magnesite and dolomite are presented in Figure1where it can be seen that both magnesite and dolomite samples have high purity and almost no impurity peaks. 2.2.2. Flotation Tests Flotation tests of single minerals and artificially mixed samples were performed using an XFG-type agitation flotation machine (Shunze mining and …
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As shown in Fig. 4, compared with the single collector of NaOL, the flotation recovery of magnesite with the mixed collector NaOL-DP improves 10–40% at the specified pH range, except for the condition of pH 11 declining 5%.The maximum recovery of 85% for magnesite was obtained at pH 10, and the selectivity index of two minerals was 3.78. …
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The major problem with Carlin-type gold deposit flotation is that the high dolomite content in the concentrate decreases the quality of gold. Further, the activation mechanisms involved in dolomite flotation …
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Surface chemistry and flotation behavior of dolomite, monazite and bastnäsite in the presence of benzohydroxamate, sodium oleate and phosphoric acid ester collectors ... HMPT temperature of 500 °C, gas flow rate of 3.5 m 3 /h and gas concentration of 22.5 vol%. After grinding and flotation defluorination, the obtained iron …
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Flotation feed material was conditioned at pH 10.0 with fatty acid followed by flotation of apatite and dolomite at pH 8. The float fraction was then reconditioned at …
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2.9.2. DFT simulation. DFT is extensively employed to analyze the chemical reaction mechanisms between flotation reagents and mineral surfaces, thereby enhancing the efficiency and selectivity of the flotation process [30], [31].The optimization of geometry and calculation of energy for the dolomite crystal and its adsorption system were …
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It was the major depressant employed in the selective inhibition of gangue minerals such as quartz, talc, fluorite, dolomite, and calcite [28,29]. At present, ... The obtained tailing of lead flotation was used for the feed of zinc flotation, and the flow sheet is shown in Figure 10. A roughing process was performed for each dose investigation ...
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Dolomite and calcite represent the primary carbonate gangue minerals associated with apatite [15], [16], [17]. These three minerals—apatite, dolomite, and calcite—exhibit similar surface properties, given their shared occurrence of Ca 2+ ions on their surfaces [18], [19], [20]. Hence, to efficiently separate these minerals through flotation ...
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It is well documented that flotation has high economic viability for the beneficiation of valuable minerals when their main ore bodies contain magnesium (Mg) …
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The flotation separation of dolomite and fluorapatite is difficult due to the similar surface properties. In this study, carboxymethyl cellulose (CMC) was introduced as a depressant for flotation of dolomite and fluorapatite, the adsorption mechanism of CMC on the mineral surfaces was clarified by DFT calculations, XPS analysis, zeta potential and …
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Artificial mixed flotation tests were conducted using 1.5 g of fluorapatite and 0.5 g of dolomite samples. In the flotation experiment, depressants were added first, followed by pH adjustment of the slurry, and then the collectors were introduced. The pH regulator and flotation reagents were allowed to react for 1 min and 3 min, respectively.
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Dolomite is a common carbonate mineral that can release CO2 gas under acidic conditions. The formation of bubbles on the dolomite surface might play a critical role in the flotation separation of dolomite from apatite. In this study, the CO2 bubbles formation due to CO2 gas releasing from the dolomite surface under acidic condition was observed …
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The flotation flow sheet of magnesite and dolomite. 2.3. Zeta-potential measurements. Zeta potential measurements were carried out using a Nano-ZS90 zeta potential analyzer ... which could explain the reason that the flotation of dolomite was much better than that of magnesite by DDA.
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dolomite surface were detected by AFM in a pH 5 solution. Meanwhile, the deionized aqueous solution was serves as a reference. The influence of CO 2 bubbles on flotation behavior and surface wettability of dolomite was clarified by micro-flotation test, contact angle measurement, and molecular dynamics simulation (MDS). 2. Materials and …
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Next, the mill discharge was transferred to a 1.0 dm 3 XFD-type laboratory flotation cell. The air flow rate was 45 dm 3 /h, and the agitation speed was 1840 rpm. The flotation experiments were performed in accordance with the flow sheet shown in Fig. 2. Five concentrates were collected at cumulative times of 0.5, 1, 1.5, 2 and 3 min.
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As illustrated in Fig. 1 c, when used as the exclusive collector, oleic acid maintains dolomite flotation recoveries at nearly constant levels, approximately 60 %, within the pH range of 6 to 8. Subsequently, with increasing the slurry pH value of dolomite, the recovery of dolomite gradually ascends, reaching approximately 90 % at a slurry pH ...
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The flotation separation of magnesite from calcium-containing minerals has always been a difficult subject in minerals processing. This work studied the inhibition effects of carboxymethyl cellulose (CMC), sodium lignosulphonate, polyaspartic acid (PASP) and sodium silicate on flotation behaviors of magnesite, dolomite and calcite, …
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Dolomite processing description from its geology mineral property to how to extract mineral from rock and placer deposit, related processing plant flow chart and layout design. ... Flotation Equipment. Flotation Machine; Mixing tank; Flotation Cells & Machines; Leaching Tank;
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Flow-through experiments with citric acid on dolostone were conducted, creating dissolution regimes with a range of different Damköhler numbers. ... In the present study, the flotation of dolomite and magnesite in acidic to neutral pH was investigated using oleate as collector and hydrochloric acid or phosphoric acid as pH regulator. It was ...
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In the reverse flotation of fluorapatite and dolomite, high-efficiency depressors of fluorapatite have received considerable attention. In this paper, the depression mechanism of hydroxy ethylene …
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Enhancing selective calcite and dolomite flotation in the phosphate ores: Investigation, modeling, and automated mineralogy assessment ... according to a …
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Therefore, HEDP is used as a selective depressant of fluorapatite in the fluorapatite–dolomite flotation–separation process. Flow sheet of single-mineral flotation experiment.
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Nitrogen gas was int roduced at a flow rate of 50 cm 3 /min and. flotation was performed for 2 min. ... Direct flotation of dolomite can be achieved by using different collectors (Table 3) [12,32 ...
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