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In normal practice this machine appears as a long tank like vessel having a number of impellers in series Mechanical machines can have open flow of pulp between the impellers or can be of cell to cell design with weirs between them Below is a typical bank of flotation cells used in industrial practice

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Flotation columns are tall cells where air is com monly injected at the base using a sparging system and pulp is fed in near the top of the column Dobby Finch 1991 Filippov et al 2000

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