Geco Flotation Cells. In the Geco New Cell Flotation Cell the pneumatic principle is utilized in conjunction with an agitating device. The machine, which is illustrated in Fig. 44, consists of a trough or cell made of steel or wood, whichever is more convenient, through the bottom of which projects a series of air pipes fitted with circular ...
A flotation cell is the primary unit operation used to recover fine oil droplets from produced water systems. Both mechanical induced gas flotation and hydraulic dissolved gas flotation cells have been used for residual oil removal from produced water since the late 1960s .
The use of low pressure injectors in the MAC flotation cell could save about 2530% of the energy used in conventional flotation systems . The benefits of the MAC flotation cell are summarized in Table 11.12.
With economic metallurgy as its objective, flotation machines have changed over the years as the demands on the process have changed.
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One of the significant changes made to reduce operating costs has been the extensive use of pressure molded rubber parts to withstand abrasion and thus reduce maintenance. Design of flotation cells has been improved and simplified to handle increased tonnage. One such development was the free flow tank design. Another change has been the use of flotation mechanisms which can be removed from the flotation machine quickly for the inspection or change of wearing parts. A simple change in the method of pre mixing air with pulp as it enters the throat of the flotation impeller has made it possible to reduce power cost as much as 50%. Development of larger flotation cells means fewer flotation cells are needed to do the job. This simplifies maintenance and reduces construction costs.
To meet the varying conditions and requirements, two basic types of flotation machines have been developed: Cell to cell Flotation Machine Free flow Flotation Machine
The cell to cell flotation machine meets the needs for both mineral recovery and cleaning and recleaning of flotation concentrates. It incorporates simplicity and flexibility of adjustment that permits the flotation operator to use his skill in securing the exact flotation conditions required by his specific ore for economic metallurgy. The cell to cell flotation machine is typified by a flotation mechanism suspended in an individual cell separated from the adjoining cells by an adjustable . A feed pipe conducts the flow of pulp from the of the preceding cell to the mechanism. Cell to cell Flotation Mechanism showing how feed pipe conducts pulp to throat of the rotating impeller. Each cell has its own mechanism, adjustable overflow s and feed pipe. Molded rubber wearing parts are used. Free Flow Flotation Mechanism showing how the pulp flows through the machine without interruption of s. Feed pipes are not used. Pulp enters the throat of the rotating impeller by flo...
The need for a flotation machine to handle larger tonnages in bulk flotation circuits led to the development of the Free Flow type flotation machine. These units are characterized by the absence of intermediate partitions or s between cells. Individual cell feed pipes have been eliminated. Pulp is free to flow through the machine without interference. Flotation efficiency is high, operation is simple and the need for operator attention is minimized. Most high tonnage mills today use the free flow type of flotation machine. Many are equipped with automatic devices for control of pulp density, pulp level, and other variable factors.
Just as modern flotation machines have evolved from the past they will change to meet future needs of the industry. Larger, more efficient flotation cells, automatic control of grinding circuits, flow meters, continuous on stream sampling, direct reading density, pH, and pulp level devices, new reagents as well as instantaneous X ray analysis will make possible almost completely automated flotation circuits and new achievements in economic metallurgy.
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.
Medium Pressure Power Inflation The power inflator is a primary means for adding air to the flotation cell. The power inflation system enables you to inflate the BC simply by pressing the small red inflation button . With practice you will soon be able to