ABSTRACT

Oily collectors are widely used to enhance the surface hydrophobicity of target minerals in flotation. However, the application of oily collectors is challenging in mineral flotation owning to their low adsorption on mineral surfaces. The presence of surfactants, fine particles and electrolytes in flotation has the potential to disperse oily collectors. In this paper, a thorough review of emulsions induced by surfactants, solid particles and electrolytes is presented. It begins with the application of collector emulsification in flotation and the mechanisms responsible for the formation and stabilization of emulsions. It is followed by a review on how surfactants, solid particles and electrolytes affect the formation and stability of emulsions. It is demonstrated that the interfacial properties between oil and water can be modified by the adsorption of surfactants acting as emulsifiers. Likewise, the adsorption of solid particles at the interface can modify the interfacial properties based on their surface wettability and particle morphology. In addition, the presence of electrolytes can influence the surface charge of oil droplets and then modify the emulsification process. Based on the review, future research is proposed to understand the emulsification of oily collectors under the context of mineral flotation.

摘要

油性捕收剂广泛用于提高浮选目标矿物的表面疏水性。然而，油性捕收剂在矿物浮选中的应用具有挑战性，因为它们对矿物表面的吸附量较低。浮选中表面活性剂、细颗粒和电解质的存在有可能分散油性捕收剂。在本文中，对由表面活性剂、固体颗粒和电解质引起的乳液进行了全面回顾。它从捕收剂乳化在浮选中的应用以及负责形成和稳定乳液的机制开始。随后回顾了表面活性剂、固体颗粒和电解质如何影响乳液的形成和稳定性。结果表明，通过吸附作为乳化剂的表面活性剂可以改变油和水之间的界面性质。同样，固体颗粒在界面处的吸附可以根据其表面润湿性和颗粒形态改变界面性质。此外，电解质的存在会影响油滴的表面电荷，进而改变乳化过程。在综述的基础上，提出了未来研究以了解矿物浮选背景下油性捕收剂的乳化作用。电解质的存在会影响油滴的表面电荷，进而改变乳化过程。在综述的基础上，提出了未来研究以了解矿物浮选背景下油性捕收剂的乳化作用。电解质的存在会影响油滴的表面电荷，进而改变乳化过程。在综述的基础上，提出了未来研究以了解矿物浮选背景下油性捕收剂的乳化作用。