Liquid spreading behavior and surface wettability of copper ore under controlled sulfuric acid solution and surfactants

Abstract

To reveal the potential effect of surfactant on improving surface wettability of copper ore, the droplet spreading behavior of sulfuric acid solution contained surfactant was visualized using high-speed camera and an image processing method, and the solid-liquid interaction was discussed in this study. The results show that liquid surface tension and ore surface roughness are the main factors affecting surface wettability. The effect of sulfuric acid solution concentration and surfactants on the surface wettability of ore is revealed via quantitative spreading area, spreading coefficient, and contact angle. The results of droplet spreading experiment show that the higher concentration of surfactant and sulfuric acid solution result in improving the wettability of ore, spreading coefficient, and decreasing contact angle. The “leaching reaction coefficient” and “surface activity coefficient” are introduced to modify the mathematical expression of the equilibrium contact angle.

Keywords

surfactant / wetting / spreading / contact angle

References

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