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本文引入一种名为浮选分级法的新分级方法,它通过控制颗粒间的相互作用达到分级目的。它和通过机械力作用进行分级的常规方法有很大的不同。本研究将微泡浮选技术引入水力分级。在分级过程中通过调整颗粒间的相互作用达到超细颗粒的选择性凝聚和分散。在分级柱中对-44μm的高岭土进行了一系列的实验室分级试验。结果表明-2μm粒级的高岭土在最终产品中的回收率达到92%。另外,得出了二个分级的判别式。最后从表面热力学和流体动力学讨论了分级原理和颗粒间相互作用的控制。
This article introduces a new classification method called Flotation Grading, which achieves grading by controlling the interaction between particles. It is very different from the conventional method of grading by mechanical action. In this study, microbubble flotation technology was introduced into the hydraulic classification. In the grading process by adjusting the interaction between particles to achieve the selective aggregation and dispersion of ultrafine particles. A series of laboratory grading tests were conducted on a -44 μm kaolin in a fractionation column. The results show that the recovery of the -2 m particle size kaolin reaches 92% in the final product. In addition, two grading discriminants are obtained. Finally, the principle of grading and the control of particle-particle interaction are discussed from surface thermodynamics and fluid dynamics.