Effect of Roughness on Floatability of Dolomite in Sodium Oleate System and Its Mechanism

doi:10.12068/j.issn.1005-3026.2023.08.016

Abstract

Abstract: In order to study the influence of surface physical properties on mineral floatability， two kinds of dolomite particles with different surface roughness were obtained by ultrasonic pretreatment. In sodium oleate system， the influence of surface roughness on the recovery rate of dolomite flotation was investigated by single mineral flotation test， and atomic force microscope(AFM)， BET， SEM-EDS， XPS， ultraviolet spectrophotometer and contact angle measuring instrument were used. The mechanism of the impact of surface roughness on mineral flotation behavior was discussed. The results show that ultrasonic treatment increases the surface roughness of dolomite particles and the content of active sites (Ca²⁺ and Mg²⁺) on the surface of rough particles is higher than that on the surface of smooth particles. This contributes to the adsorption of sodium oleate on mineral surface， enhancing its hydrophobicity and floatability.

Key words: dolomite； roughness； flotation； active site； ultrasonic treatment

CLC Number:

TD927

ZHAO Xu， YIN Wan-zhong， YAO Jin， ZHU Zhang-lei. Effect of Roughness on Floatability of Dolomite in Sodium Oleate System and Its Mechanism[J]. Journal of Northeastern University(Natural Science), 2023, 44(8): 1188-1194.

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