The TUNRA Clean Coal Froth Depth Detector (FDD) has been designed to provide flotation plant operators an accurate indication of where the froth/liquid interface is within their cells, and as a result, the froth bed depth. Froth depth is a key control parameter for any flotation unit operation.

The FDD takes away the inaccuracies inherent with the differential pressure method of monitoring froth depth by using a float specifically designed for operation within liquids with varying densities.  It is ideally suited for highly aerated liquids and as the aeration increases, the density of the liquid decreases and normal cylindrical or ball shaped floats will sink and operate at a different level. The TUNRA FDD float has a precisely designed and manufactured shape that greatly reduces the movement created by such density changes.

The unit is made from 316 stainless steel, and provides the operating system with a 4-20 mA signal from a 10 to 30 VDC source. No moving parts are immersed in the froth or liquid, meaning jams or blockages from solids build up are prevented. A physical scale on the FDD can be easily read whilst viewing the unit, as well as a signal being sent to the control room.

The FDD can be adjusted for any depths required, and can be custom fitted to any flotation cell.

More information is available by contacting us at TUNRA Clean Coal.

Geoffrey.Curnow@tunracleancoal.com

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