Hydrodynamic Zones

A mechanical flotation cell necessitates generation of three distinct hydrodynamic zones for effective flotation. The region close to the impeller encompasses the turbulent region necessary for solids suspension, dispersion of gas into bubbles and bubble-particle interaction for collection of minerals on the surface of the bubbles. Above the turbulent region lies the quiescent zone where the

Figure 1 Schematic diagram of a mechanical flotation cell. 1, Discharge box; 2, concentrate launders; 3, feed box; 4, cell lip; 5, bearing shaft; 6, drive pulley with guard; 7, three-phase induction motor; 8, air inlet pipe with control valve; 9, concentrate launder discharge point; 10, impeller shaft; 11, tailings discharge point, 12, base support for the cell tank.

Figure 1 Schematic diagram of a mechanical flotation cell. 1, Discharge box; 2, concentrate launders; 3, feed box; 4, cell lip; 5, bearing shaft; 6, drive pulley with guard; 7, three-phase induction motor; 8, air inlet pipe with control valve; 9, concentrate launder discharge point; 10, impeller shaft; 11, tailings discharge point, 12, base support for the cell tank.

Figure 2 Hydrodynamic zones in a mechanical flotation cell.

bubble-particle aggregates rise up in a relatively less turbulent region. This region also helps in reducing the number of gangue minerals which may have been entrained mechanically or entrapped between bubbles for upgrading of valuable minerals. The region above the quiescent zone is the froth zone that serves as an additional cleaning step and improves the grade of the concentrate product. The three hydrodynamic zones in mechanical flotation cells are depicted in Figure 2.

The conflicting functional requirements in different zones in a mechanical flotation cell are a challenge in terms of the cell design and a fine balance of hydrodynamic conditions is necessary for the optimum recovery of valuable minerals in a cell.

Solar Panel Basics

Solar Panel Basics

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