Oct 20, 2021 Copper flotation recoveries averaged 85.1% in October. The Phase 1, steady-state-design copper recovery is approximately 86%, depending on ore feed grade. ... Flotation is at the heart of your mineral processing business. Trust it to someone who is committed to achieving the best performance at the lowest cost. Nalco Water offers a diverse portfolio of flotation programs, all of which are developed to overcome flotation process challenges encountered in a variety of metals and mineral operations.