conventional mechanical cells. Column flotation, invented in the early sixties, proved to be a better alternative to the conventional cells. The main advantages of column flotation are : i) improved recovery, ii) higher grade, iii) lower capital and operating costs, iv) less wear and
Cells can be easily added when required. This flexibility is most important in operating flotation MILLS. Pulp Level Is Controlled in each Sub A Flotation Cell as it has an individual machine with its own pulp level control. Correct flotation requires this positive pulp level control to give best results in these Cells blocks are used, but handwheel controls can be furnished at a slight increase in cost.
Most of the flotation cells are equipped with sensors for measurements for froth level thickness and air rate. Existing Control Automatic low level control is used for the regulation of the froth levels using the froth level sensors and the valves at the tailings ports. However, manual control of the plant is still state of the art for
flotation cell can be relatively thin or thick. The level of the floatation cell can be either increased or decreased to allow for the most efficient skimming of either thin or thick sludge blankets. Just remember not to set too high so as to create an overflow condition in the DAF unit scum chamber ...
Operating above the maximum capacity can cause the performance of flotation cells to be poor even when adequate slurry residence time is available . For example, Fig. 11.21 shows the impact of increasing volumetric feed flow rate on cell performance .
no flotation can occur. Contact between particles and bubbles can be accomplished in a flotation cell such as the one shown schematically in Figure 5. Figure 5: Simplified schematic of a conventional flotation cell. The rotor draws slurry through the stator and expels it to the sides, creating a suction that draws air down the shaft of the stator.