A method for evaluating seed balance parameters in alumina, refinery seed classification systems

An important consideration in controlling alumina refinery seed classification systems is ensuring that quantity and particle size distribution for seed produced matches with that for seed charged. When this condition is not satisfied, the system may not be stable, resulting in changing seed inventory quantities and particle size distribution. In this paper, information from a previously reported method for evaluating operating characteristics of seed classifiers is utilized to simulate a classification system and determine seed charge quantities and particle size distribution which balance with seed produced. Out-of-balance cases are described to evaluate consequences, and balanced cases are developed to illustrate the method.