2020
DOI: 10.1590/0370-44672019730136
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Abstract: A study was carried out to investigate the combined effect of released ions in the pulp by pH regulator and mineral surface on dolomite flotation. The tests were carried out using a dolomite sample in a bench flotation cell with automatic froth remover. Zeta potential measurements, solution conductivity and FTIR analysis were done to support the interpretation of the results. The main reagents used for pH adjustment in the alkaline range (calcium hydroxide, sodium hydroxide, and sodium carbonate) were compared… Show more

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Cited by 10 publications
(3 citation statements)
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“…The amine molecule (RNH2) has unshared electron pairs in the nitrogen atom that has a strong ability to complex metals by means of coordinated covalent bonds (Cartmell and Fowles, 1956). This adsorption mechanism was also suggested by Freeman et al (2009), Gao et al (2015), Oliveira and Baltar (2020).…”
Section: Fig 3 Zeta Potential Of Pyrite With and Without Collectorssupporting
confidence: 57%
“…The amine molecule (RNH2) has unshared electron pairs in the nitrogen atom that has a strong ability to complex metals by means of coordinated covalent bonds (Cartmell and Fowles, 1956). This adsorption mechanism was also suggested by Freeman et al (2009), Gao et al (2015), Oliveira and Baltar (2020).…”
Section: Fig 3 Zeta Potential Of Pyrite With and Without Collectorssupporting
confidence: 57%
“…Dolomite is a sparingly soluble salt-type mineral, so various forms of lattice ions originating from cation hydrolysis and anion proton reaction can be identified in the aqueous environment [ 58 ]. Dolomites are naturally hydrophilic minerals, unstable at acidic pH due to their chemical nature, and can buffer the solution to a specific pH value around 10 (in conditions of pH < 7, mineral particles slowly decompose by dissociation) [ 59 , 60 ]. Ca 2+ and Mg 2+ cations are released from the mineral surface, but at pH 10 their concentration is much lower than the concentration of anions, such as HCO 3 − and CO 3 2− [ 61 ] ( Figure 4 A).…”
Section: Resultsmentioning
confidence: 99%
“…In pure mineral flotation tests, the flotation performance of GA was close to that of traditional depressants and superior to citric acid. The pH of dolomite slurry was maintained at 9.0-10.2, 38,39 and the CO 3 2− in the mineral helped regulate the pH in the solution, avoiding the need for additional acid consumption under alkaline conditions. Compared with traditional and green depressants, the amount of GA in pure mineral flotation was small, and since no N, P, or S was present in its structure, water eutrophication and acid rain were avoided.…”
Section: Discussionmentioning
confidence: 99%