When Rich Johnson started his career, flotation circuits consisted of rows of forced-air cells sized at 1.4 m3 (48 cu ft) each. Over the next few decades, he has seen the industry transitioning to 300-m3 (10,594-cu ft) tank cells and kept pace with the changes, resulting in “a lifetime of making projects happen.” Doug Pitts is continuing a 55-year career in the minerals, hydrocarbons and alternative-energy sectors, and Gus van Weert, at 90 years of age, remains a vital force commanding respect with his wealth of knowledge. Peter Amelunxen embodies the second generation of a family of career mineral-processing experts, following in the footsteps of his father, Roger Amelunxen.
