In the mechanical flotation cells the feed can be introduced directly to the impeller zone from the side as in a Denver style Sub A sub aeration machine.. A centrally located paddle wheel type impeller generates a rotating pulp vortex which extends between two stationary elements: the sand pipe located at the top of the cell, and the draft tube located at the bottom of the cell.
Introduction: SF flotation cell is a mechanical agitation type flotation machine with slurry suction and air suction. Capacity: 0.24～12m³ Improvement: Both sides of the impeller with back rake blades ensures double circulating of slurry inside the flotation tank.
Almost all successful models of the flotation process have been based on the premise that flotation is a kinetic process. In this way a model can be formulated in terms of a rate of flotation which can be quantified in terms of some of the many chemical and physical factors that define the environment inside a flotation cell.
Depending on the flotation cell type, shear forces are applied by a variety of mechanical systems. Among the most common are impellers and mixers. Some systems combine the functionalities of these components by placing them at key locations where they can take part in multiple froth flotation mechanisms.
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The shape of a mechanical flotation tank is essentially rectangular, U shaped, conical or cylindrical, according to the cell type and size. It is fitted with an impeller/rotor and stator/diffuser. Air enters into the device through a concentric pipe surrounding the impeller shaft either by self aspiration or aided by a compressor.
Columns cells also differ in the way gas bubbles are generated. Air is either injected directly into the cell with use of internal spargers, or is carried into the cell through a high velocity recirculated stream of tailings. The air input can then be controlled depending on concentrate grade or varying throughputs. 3. Features of Flotation Column
The process is carried out in a flotation cell or tank, of which there are two basic types, mechanical and pneumatic. Within each of these categories, there are two subtypes, those that operate as a single cell, and those that are operated as a series or bank of cells.