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.
A mechanical Sotation cell essentially consists of a vessel ora tankRtted with an impeller or rotor.The impeller agitates the slurry to keep particles in sus pension, disperses air into Rne bubbles and provides an environment in the cell tank for interaction of bubbles and hydrophobic particles and their sub sequent attachment and therefore separation of valu able mineral particles from the undesired gangue mineral particles.
The water in the flotation cell is conditioned to promote the formation of a more or less stable froth. The bubbles do not burst when they cross the interface and each one carries a skin of water into the froth phase. The bubbles move close together with a single film of liquid separating the individual bubbles.
Engineering Design Engineering a Cell Phone Flotation Device . Objective . Students will design, test, modify, and optimize a device that uses a chemical reaction to produce enough gas to inflate a bag to make a cell phone float. Key Concepts The goal of engineering is to design an object or process to solve a problem.
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.
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.
Floatation Column Typical industrial column cell comprises a steel tank equipped with a feed inlet pipe near the top of the column, a system of internal and external launders to collect and remove froth and a slurry outlet near the bottom of the tank to remove non floating material. Drain nozzle and a series of re pulping nozzles are also ...
The slurry flow then enters the feed end of the flotation cells. The slurry at this point is called the HEADS of the circuit. The mineral is then separated and flows over the overflow into a trough called a flotation cell LAUNDERER. The OVERFLOW is now called the flotation CONCENTRATE of the circuit.