Typically, six to 10 flotation cells in series (primary flotation) are required for efficient ink removal. The froth from primary flotation is subsequently cleaned in a secondary or recovery stage (usually two cells) to further recover good fibres and to decrease fibre loss.
More ores are treated using froth flotation cells than by any other single machines or process. Non metallics as well as metallics now being commercially recovered include gold, silver, copper, lead, zinc, iron, manganese, nickel, cobalt, molybdenum, graphite, phosphate, fluorspar, barite, feldspar and coal.
Flotation feed is generally the ball mill cyclone overflow but in cases where some of the valuable minerals are liberated at coarse sizes and are recirculated in the cyclone underflow, these can be recovered before overgrinding by treating the cyclone underflow by flotation. A flotation cell designed to treat the coarse cyclone underflow is the Skimair or Flash flotation cell. This is designed to handle
The energy cost contribution of the flotation process is thus extremely small, which transfers into insignificant energy saving potential. Furthermore, the current trend to increase the single cell volume and develop more efficient flotation machines, results in lower installed specific power.
highest quality cell performance at any operating altitude. There is a smoother, more efficient airflow in the flotation cell, so the size and velocity of the bubbles is optimized without wasting energy. The effectiveness and efficiency of the flotation process is furthered