Imhoflotpneumatic flotationtechnology has evolved through 25 years of industrial applications. This has led to the development of thepatented Imhoflot G-Cellwhere centrifugal forces are used in thecellto quickly separate the phases after mineral collection and therefore considerably reducing the size of vessels required. Imhoflot is characterised by:Get Price
First, the collector is added to the iron ore slurry to selectively coat the iron oxide particles, making the surface hydrophobic. The slurry then goes to aflotation cell, where air bubbles are generated using an impeller and aerator (Figure 1.2.4). At this step, the frother (for example, fuel oil) is added to the ore slurry to form stable froth and air bubbles.
Theflotation cellsare designed for a variety of throughput requirements, ranging from small pilot sizedcellswith a diameter of 0.8m, processing 6 – 10 m 3 /h of feed; tocellswith a diameter of 6.5m, handling feeds of 1500 m 3 /h. Theflow rateis dependent on the feed pressure and rate of concentrate removal.
Apneumatic flotation celloperates on the principles of mixing the air and pulp in a continuous stream, and ensuring that correctly sized bubbles are fed into thepulpas it enters thecell. This maximizes the number of particle and bubble collisions.
ThePNEUFLOT® cellsare characterized from otherflotationmachines present in the market by itsself aerationtechnology (no need of blower) and absence of any movable parts.
The design objectives for Imhoflotpneumatic flotationare to separate and optimize the independent process steps that make up frothflotation:aeration, bubble-particle contact and froth separation. Theaeratoris self-aspirating and uses a high shear ceramic multi-jet venturi system operating at around 2.5 bar (250 kPa ) back pressure.
pneumatic flotation. Future trends are likely to retain columns for cleaning operations, but an overlap is developing between applications for large mechanical tanks and the newpneumatic flotationsystems. Thepneumatic flotationtechnology of today has its origins in the Bahr-cellof …
Our RCS™ flotation machines are built with efficient air and level controls with controlled aeration rate at each cell. The pneumatically operated dart valves help in effective pulp level control followed by accurate measurement with ultrasonic level sensor and float.
Flotation columnscomprise a tall tank, in which the separation between froth and pulp occurs, anaerationsystem, a pulp level control system, a wash water system, a discharge barometric leg and a set of control instruments, besides pipe connections for feed, concentrate and tailings. Figure 1 illustrates a typical column. Figure 1.
Flotation cellsare “standard equipment”for an ever widening range of metallurgical and industrial problems. They are being used in plants of all types and sizes and they are giving excellent results at minimum cost at tonnages of a few tons up to 35,000 tons per 24 hours.
Effectiveairdispersion and distribution throughout thecellvolume helps in smooth froth surface and removal. Efficientairand level control. OurRCS™ flotation machinesare built with efficientairand level controls with controlledaerationrate at eachcell.
The WEMCO rotor is located at top of thecell, and the nextSTEP rotor is placed at the bottom of the machine. The rotor placement creates different flow patterns within thecell, which affects froth recovery. When it comes toaerationof thecells, WEMCO machines draw in and useair…
GecoFlotation Cells. In the GecoNew-Cell Flotation Cellthepneumaticprinciple is utilized in conjunction with an agitating device. The machine, which is illustrated in Fig. 44, consists of a trough orcellmade of steel or wood, whichever is more convenient, through the bottom of which projects a series of air pipes fitted with circular mats of perforated rubber.
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