Little is said about selectivity but there is a constant cry for increased recovery. This might be what industry wants but it is certainly not what industry needs. However, physics based studies are merely concerned with increased recovery not increased selectivity; selectivity in flotation is only achieved by attention to the pulp chemistry. Yet, currently, there appears to be little (research) money being directed towards chemistry based flotation studies. Strong, and successful, chemistry based research groups like those at CSIRO and The Wark have all but disappeared because of a lack of (financial) support.
Third more important question. How many of the people putting up the money for this research even understand the problem? And would some of the currently available research money be better spent on further understanding the problems of, and developing techniques for, upgrading low grade concentrates?