The uncollected particles are removed through an underflow line. As with a flotation column the froth may be water washed meaning the contact cell can also be used as a cleaner cell. The contact cell is mainly used in rougher flotation circuits. It is compact highly efficient simple to operate and has low energy and maintenance costs.
The Jameson Cell has been found to be particularly effective in cleaning and recovering fine coal particles. For example at BHP Coal& 39;s Goonyella mine now part of the BHP Mitsubishi Alliance eight Cells were installed to replace the entire 32 mechanical cell flotation circuit in 1995 in its 1800 t/h coal flotation plant.
Flotation system is based around a group of 6 float cells arranged in a circular tank each individual cell fitted with impellers air spargers and froth launders. Host of benefits in the design; better mixing in slurry appli ions resulting in greater efficiency for reactions and a greater uniformity within the tank.
For example froth flotation is a technique commonly used in the mining industry. In this technique particles of interest are physically separated from a liquid phase as a result of differences in the ability of air bubbles to selectively adhere to the surface of the particles based upon their hydrophobicity.
By that time flotation technology was changing especially with the discovery of the use of xanthates and other reagents which made the Callow cell and his process obsolete. Montana Tech professor Antoine Marc Gaudin defined the early period of flotation as the mechanical phase while by the late 1910s it entered the chemical phase.
