LIQUID/SOLID FLUIDIZATION ITS ROLE AND LIMITATION IN FINE BENEFICIATION – A REVIEW

Abstract

Among many emerging fine beneficiation methods, the liquid/solid fluidization technique has become the operator's choice owing to its superior performance. In this article, the subject is revisited with the aim to enhance process efficiency through basic understanding of the process. Bulk density difference between ore and gangue particles during fluidization leads to segregation when fluidized together and is the preferred condition for mineral beneficiation. Size ratio, density ratio, and shape difference between particle components control difference in bulk density. Based on this knowledge, a feed for liquid/solid fluidization is presumed as a mixture of three different types of binary systems; (a) easily separable, (b) difficult to separate, and (c) nonseparable. This classification suggests that feed rich with easily separable–type particles is the ideal choice for this technique. The feed is very sensitive to operating parameters that contains large proportion of difficult-to-separate-type particles.

Keywords:

• Fine mineral beneficiation
• Liquid/solid fluidization
• Particle segregation