Pumping of frothy suspensions
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The concept behind a froth pump is to avoid pumping air and to separate as much air as possible from the slurry before it reaches the pump impeller.
The vertical froth pumps utilize the same principle as hydrocyclone separation where air is separated from the slurry in a vortex created by the impeller rotation and the tangential inlet to the pump's conical sump.
This results in more efficient pumping at higher capacities and a smooth operation, free from pulsations caused by air locking.
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Froth Pump is designed for slurry containing froth and pulp. Froth pumping can be challenging however our range of horizontal froth pumps handle very dense slurries with ease. Designed to handle heavy froth, the CNSME® SF/75QV Froth Pump has a unique inlet and impeller design.
Foam facto can be used as a basis for choosing a pump. The "froth factor" is a measure of the air contained in the froth. It is quantified by filling a measuring cylinder or bucket, of known volume, with froth and measuring the froth column. After air dissipation the remaining water and solids volume is measured. The ratio of the original volume of froth to the remaining combined volume of water and solids is the "froth factor". Measured "froth factor" values are not employed by the flotation cell or pump designers. These are modified based on experience and application.
SF Froth Pump Structural Drawing: