Investigation of spherical oil agglomeration properties of celestite

This study investigates the relationship between the critical surface tension of wetting of celestite and agglomeration recovery as well as the zeta potential in dependence of pH and amount of collector (Na-Oleate). For this purpose, effects of pH and collector amount on the agglomeration recovery are investigated and zeta potential measurements and Fourier Transform Infrared Spectrophotometer (FTIR) analyses are carried out to determine the adsorption type of Na-Oleate on celestite surface. The sessile drop technique is used for the measurement of contact angle and determination of the critical surface tension of wetting (yc) of celestite. The maximum agglomeration recovery is obtained at pH 7. The critical surface tension of wetting of celestite is very close to the surface tension of kerosene, which is 25.95 mN/m. Furthermore, at the optimum Na-Oleate amount of 10 kg/ton, the critical surface tension of wetting of celestite is approximately equal to the surface tension of kerosene.

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“…The results of FTIR spectra of celestite are given in Figure 8 in the absence and presence of Na-Oleate [32].…”

Section: Discussionmentioning

confidence: 99%

The Influence of Surfactant on the Surface Characterization of Celestite in Spherical Oil Agglomeration

Sönmez

Cebec

2006

steel research international

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“…The AR% also responds to oleate concentration in the same manner as the contact angle, revealing a close correlation between the agglomeration and the particle hydrophobicity. Sodium oleate as an anionic surfactant adsorbs on celestite surfaces by chemical interaction (Martinez and Uribe, 1995;Cebeci and Sonmez, 2003) and the adsorption density of oleate on mineral surfaces increases with increasing oleate concentration so that renders the particle surfaces more hydrophobic. It is suggested that sodium oleate is adsorbed on the celestite surfaces via a chemical adsorption mechanism in alkaline suspensions.…”

Section: Oil Agglomeration Experimentsmentioning

confidence: 99%