·The flotation separation of fluorite from calcite using mixed collector NaOL/DDA and salted water glass was investigated using micro flotation experiments The adsorption mechanism of the mixed collector was uncovered by wettability and FTIR analyses The micelle characteristics and molecular activity of the mixed collector were studied by
·Fluorine is commonly utilized as an industrial additive in aerospace separation of uranium 235 semiconductors medicine and other areas of national importance [1] The primary source of elemental fluorine is fluorite CaF 2 recognized as a strategic mineral resource by several countries [2] Typically fluorite separation is usually carried out by flotation due to its
·Fluorite is the only raw material needed for the production of hydrofluoric acid and is a non renewable resource Most fluorite ores have to be upgraded before entering the fluorite market and the commonly used beneficiation process is flotation Ayhan et al 2013 The most commonly used collector for the flotation separation of fluorite from gangue minerals is
Fluorite ore flotation is a method that is widely used in the separation process in fluorite [14] [15] [16] This separation technique results in high quality fluorite concentrates [17] [18] Nevertheless this approach still encounters a number of challenges [19] [20]
·Fluorite CaF 2 which is a major source of fluorine in the Earth has been considered as an important strategic mineral in recent years [1] In natural ore deposits fluorite is mostly associated with calcite CaCO 3 mineral [2] Around the world froth flotation method is commonly used for the separation of fluorite from calcite
·At present the primary beneficiation approach of fluorite is flotation [5] In the deposits fluorite is often associated with gangue minerals such as calcite and quartz which share similar surface properties with fluorite solubility crystal structure hydrophobicity and zeta potential making the effective separation challenging to achieve [[6] [7] [8]]
·A series of amino acid based surfactants with a fixed alkyl chain length and with two carboxyl groups separated by a spacer of one two or three carbon atoms have been synthesized and evaluated as potential collectors for flotation of calcite and fluorite A monocarboxylate amino acid based surfactant having the same length of the hydrocarbon tail
Effective flotation separation of fluorite and calcite is a critical challenge due to their comparable physicochemical characteristics and surface effects of sodium silicate SS and Al 3 on the flotation separation of homogenized fluorite and calcite were investigated based on flotation experiments and various measurements such as Zeta potential scanning electron
·The main approach to purifying the fluorite resources is flotation [4] In this regard sodium oleate NaOL as the derivative of fatty acids has been widely used as collector as it can adsorb on the minerals and makes their surfaces hydrophobic thereby improving their floatabilities [[5] [6] [7]] Nevertheless NaOL performs a poor selectivity to adsorb on the
·This combined reagent system can achieve the separation of fluorite and calcite The FTIR measurement results show that NaOL and DDA are co adsorbed on the surface of fluorite whereas only NaOL is adsorbed on the surface of calcite The wettability analysis results show that the salted water glass hinders the adsorption of mixed collectors on
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