Flotation equipment design is an area of reactor engineering that has not attracted much research interest in chemical engineering. The commercial success of flotation remains a triumph of enlightened know how over inadequate know why as key design and scale-up parameters (e.g. column height) continue to be dictated by such non-process considerations as crane rail and building heights (Ounpuu and Tremblay, 1991). The shortcomings in the present approach to flotation column design and scale-up are discussed. It is shown that the use of first order kinetic expression in flotation column design and scale-up is not correct insofar as the recovery and order of the process are concentration dependent. By using analogy with interface mass transfer, a new approach to flotation column design is presented. Using literature data, it is shown that only a short recovery zone is required for particles made selectively hydrophobic. Recent experimental data from 1.2m flotation column (Ounpuu and Tremblay, 1991) and those of others as well (Wheeler, 1984; Bensely 1985; Jameson, 1988; Reddy 1988) confirm this observation.
All Science Journal Classification (ASJC) codes
- Chemical Engineering(all)
- Industrial and Manufacturing Engineering