Estimation of the critical surface tension of wetting of hydrophobic solids by flotation

Determination of the critical surface tension of wetting of minerals treated with surfactants by shear flocculation approach

“…The flotation method [9] estimates the γ c value of any mineral by plotting % flotation recovery (FR%) versus solution surface tension (γ LV ) with the extrapolation of the linear part of the FR-γ LV curve to the surface tension axis in order to obtain an intercept at %FR = 0 as given in Fig. 2.…”

“…One of these quantifying parameters mentioned above is the critical surface tension of wetting (γ c ) to achieve selectivity in surface chemistry processes [7]. The γ c parameter is determined by contact angle measurement, flotation, immersion time, bubble pickup, film flotation, automatic wetting balance, and modified Hildebrand-Scott equation methods [8][9][10][11][12][13][14]. The Zisman contact angle measurement technique and the flotation method are the two major techniques used to determine the (γ c ) values of minerals among these experimental and empirical techniques [15][16][17][18].…”

A study on the relationship between critical surface tension of wetting and oil agglomeration recovery of calcite

“…There are limited studies on contact angle measurement for sulfide and nonsulfide minerals to illustrate domains of hydrophobicity and hydrophilicity under a variety of conditions involving pH, collectors, and depressants [15][16][17][18][19][20].…”

“…Wettability or flotation characteristics of solids or minerals can be estimated quantitatively by a number of experimental and empirical techniques [3][4][5][6].…”

Evaluation of Critical Parameters for Wettability-Based Processes in Mineral Processing

“…Yarar and Kaoma [15] found that the flotation recovery of minerals decreases as decrease of the air-liquid interfacial tension of the liquids used as flotation medium. Based on this finding, the authors also proposed the flotation method to determine the critical surface tension of wetting ( c ) of minerals.…”