Volumetric feeders maintain a net volume of alumina delivered to a pot. Consistency in bulk density is essential in minimising effects of any changes in feed rate, but what is meant by bulk density?
A new look at an old determination is presented which will warrant a second look at how bulk density is measured if the value is to have any relevance. The significance of measurement apparatus critical dimensions, flow rates, particle size distribution and sample history are discussed.
Findings are presented which will need to be taken into account in the development of any standard procedure, and which will make bulk density determination a more useful value than it may have been in the past.