Abstract

In this study, the influence of ultrasound on the stability of colemanite suspension was first studied without reagents, and the effects of ultrasound power value, treatment regime (batch and continuous), probe immersion depth, and treatment time on the suspension stability were determined. Then, the effects of ultrasound on the flocculation of colemanite with sodium dodecyl sulfate, Aero 845, and sodium oleate were investigated, and changes occurred in the flocculation efficiency, zeta potential and contact angle values were shown depending on the collector concentration. The experimental findings revealed that the application of ultrasound reduced the suspension stability; that is, enhanced flocculation of colemanite particles occurred due to the ultrasonic promotion. By the ultrasonic treatment, the contact angles measured on the mineral surface in the presence of these collectors increased. In addition, the ultrasonic treatment led to increases in the surface charge of colemanite mineral with these surfactants. These results indicated that the ultrasound increased the adsorption of collectors on the mineral surfaces, as a result of this, the hydrophobization of the colemanite surfaces improved, and thus the flocculation of colemanite enhanced.

摘要

在这项研究中，首先在没有试剂的情况下研究了超声对硬硼钙石悬浮液稳定性的影响，并确定了超声功率值、处理方案（分批和连续）、探头浸入深度和处理时间对悬浮液稳定性的影响。然后，研究了超声对十二烷基硫酸钠、Aero 845和油酸钠絮凝硬硼钙石的影响，发现絮凝效率、zeta电位和接触角值随捕收剂浓度的变化而变化。实验结果表明，超声波的应用降低了悬浮液的稳定性；也就是说，由于超声波促进，硬硼钙石颗粒发生了增强的絮凝。通过超声波处理，在这些捕收剂存在的情况下，在矿物表面上测得的接触角增加了。此外，超声处理导致具有这些表面活性剂的硬钙石矿物的表面电荷增加。这些结果表明，超声增加了捕收剂在矿物表面的吸附，从而提高了硬钙石表面的疏水化，从而增强了硬钙石的絮凝。