An Experimental Study on Fluidization of Binary Mixture in Particulate Flows

作者：Obuseh Chukwuyem C; Feng Zhi Gang^*; Paudel Basu D

来源：Journal of Dispersion Science and Technology, 2012, 33(9): 1379-1384.

DOI：10.1080/01932691003800163

• Bi-dispersive
• fluidization
• fluidized bed
• poly-dispersive
• segregation

In this article, we studied experimentally the fluidization of binary mixture in particulate flows. A laboratory fluidized bed is built with water being used as carrying fluid. Three types of solid particles, nylon, glass, and aluminum of the same size and different densities, were used in the experiments. We investigated the wall effect to the fluidization of a single particle, the fluidization of binary mixture of nylon and aluminum with a density ratio of 0.42, and the fluidization of binary mixture of glass and aluminum with a density ratio of 0.91. Our results show that the presence of narrow walls reduces the minimum fluidization velocity for a single particle up to 40%. We also found that in the case of binary mixture of glass and aluminum particles, uniform mixing can be easily achieved with no segregation observed; on the other hand, in the case of binary mixture of nylon and aluminum particles, significant segregation and separation are observed. Based on experimental results, correlation relationships between fluidization velocity and bed height are also reported.

• 出版日期2012