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Calcite Flotation in Potassium Oleate/Potassium Dihydrogen Phosphate System
Author(s) -
ElMofty Salah ElDin,
ElMidany Ayman
Publication year - 2015
Publication title -
journal of surfactants and detergents
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.349
H-Index - 48
eISSN - 1558-9293
pISSN - 1097-3958
DOI - 10.1007/s11743-015-1707-5
Subject(s) - calcite , chemistry , reagent , potassium , inorganic chemistry , adsorption , solubility , phosphate , calcium , potassium phosphate , chemical engineering , mineralogy , chromatography , organic chemistry , engineering
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 (KH 2 PO 4 ) were used as collector and depressant, respectively. Micro‐flotation experiments were conducted to probe the effect of these chemical reagents as well as their interaction on calcite flotation using H 2 SO 4 as a pH regulator. In addition, to elucidate the depressing action of KH 2 PO 4 on calcite, electrokinetic properties of calcite have been measured in relation to pH and in the absence and presence of KH 2 PO 4 . Moreover, thermodynamic calculations were used to rationalize the reasons for calcite depression as well as the adsorption mechanism of KH 2 PO 4 onto the calcite surface.