ABSTRACT
While Chapter 7 focused on the theory of froth flotation, this chapter focuses on the practical implementation. However, single-stage froth flotation is typically incapable of the selectivity required to be practical. This can be solved by using multi-stage froth flotation, but as froth flotation is primarily used as a secondary separation for coal recovery, the plant space available for it is at a premium. Column flotation arranges these additional stages vertically, minimizing floor space while maximizing recovery. This chapter discusses the practical aspects of flotation column design for coal separations, including considerations such as height, diameter, packing, baffles, and air flow. Column flotation represents a significant improvement over single-stage flotation setups, and can be used even on very impure, very fine coals.
