β Scribed by B. Formisani; R. Girimonte; T. Longo
No coin nor oath required. For personal study only.
The main characteristic of the fluidization process of particulate mixtures is the interaction between bed suspension and segregation-remixing dynamics of their components.
On addressing the fluidization properties of binary beds of solids differing either in particle density or diameter, the paper shows how interpretations based on definition of a minimum fluidization velocity of the mixture can lead to erroneous conclusions about the influence played by system variables on their behaviour. An alternative method of investigation is followed which takes into consideration the existence of a finite velocity interval, bounded by the "initial" and "final fluidization velocity" of the mixture, along which the whole process of fluidization has place. The results of a wide series of experiments demonstrate that this alternative approach allows recognizing the independent variables of binary fluidization; they also highlight the differences of behaviour between density-and size-segregating beds.
π SIMILAR VOLUMES
The influence of pressure on minimum fluidization velocity has been measured in a pressurized fluid&d bed. Three different bed materials, corresponding to Geldart' s group B or group D particles, were investigated at pressures between 0.1 and 1.6 MPa. The onset of Auidization was determined both vis
## Abstract Experimental investigations show that fluidized binary mixtures exhibit varied pressure drop profiles and segregation patterns, depending on the level of disparity due to size and/or density differences. In this study, different mixture types are mapped on a graph of density versus size