On the relationship between hydrodynamic characteristics and the kinetics of column flotation. Part I: Modeling the gas dispersion

摘要: Abstract Modeling of flotation has been the subject many investigations aiming at better understanding process behavior per se, and as well for design, control optimization purposes. With this regard, importance hydrodynamic characteristics, either manipulated or measured variables, are paramount. The interfacial area bubbles ( I b ) is introduced in Part 1 paper a variable providing more information about size distribution than commonly used bubble surface flux S ). Experimental evidence shows that can exhibit normal, lognormal, even multi-modal shape. Unlike Sauter mean diameter d 32 , derived from complete distribution, takes into account these specific characteristics. Fundamental expressions proposed to allow characterising using population standard deviation. results indicate lognormal distributions, correlates with gas hold-up . 2 analyzes correlation dispersion characteristics rate constant.