Song S, Lopez-Valdivieso A
Instituto de Metalurgia, Sierra Leona 550, San Luis Potosí, S.L.P., C.P.78210, Mexico
J Colloid Interface Sci. 1999 Apr 1;212(1):42-48. doi: 10.1006/jcis.1998.6012.
Computations based on the extended DLVO theory are carried out on the potential energies of interactions between air bubbles and talc particles covered by nonpolar oil. It is shown that the major role of nonpolar oil in this system is to greatly increase the depth of the primary energy valley, giving rise to a much stronger bubble-particle aggregate that can support greater aggregate-rupture force fields from turbulent flows. Also, due to nonpolar oil involvement, the energy barrier between bubbles and mineral particles sharply collapses down and further separates, indicative of a greater probability of attachment of mineral particles to air bubbles. A linear relationship is found between the primary energy valley and the contact angles of oil or bubbles, and thus a simple and approximate formula is presented to evaluate the depth of the primary energy valley. In addition, it is found that the primary energy valley and the energy barrier are directly proportional to the effective particle radius, but the barrier location is independent of the effective particle radius. Copyright 1999 Academic Press.
基于扩展的DLVO理论，对气泡与覆盖有非极性油的滑石颗粒之间的相互作用势能进行了计算。结果表明，该系统中非极性油的主要作用是极大地增加了主能谷的深度，从而产生了更强的气泡 - 颗粒聚集体，该聚集体能够承受来自湍流的更大的聚集体破裂力场。此外，由于非极性油的参与，气泡与矿物颗粒之间的能垒急剧坍塌并进一步分离，这表明矿物颗粒附着在气泡上的可能性更大。发现主能谷与油或气泡的接触角之间存在线性关系，因此提出了一个简单的近似公式来评估主能谷的深度。另外，发现主能谷和能垒与有效颗粒半径成正比，但能垒位置与有效颗粒半径无关。版权所有1999年，学术出版社。
