B - Operations – Transporting – 03 – D
Patent
B - Operations, Transporting
03
D
361/31
B03D 1/16 (2006.01)
Patent
CA 1211871
ABSTRACT An apparatus and method for flotation of minerals and non-minerals are disclosed which incorporate the advantages of both dissolved air flotation and sparged air flotation. A flotation machine is provided consisting of a flotation chamber and a rotating gas diffuser. The flotation chamber has a unique design and features which create an efficient lower mixing chamber and an upper quiescent zone for maximizing float accumulation. The rotating diffuser produces ultra fine bubbles as small as 50 microns in diameter. The size of the bubble diameter can be controlled and produced in any size from less than 50 microns to greater than 3 mm to enable flotation of various materials and/or various sized fractions of materials. The ultra fine bubbles are produced by the diffuser in the same size range as bubbles produced by dissolved air flotation, but without the necessity of pressurizing gas in a first tank followed by depressurizing in a second tank. Since the diffuser is located within the flotation chamber and can vary bubble size, it also provides the advantage of sparged air flotation. This rotating diffuser configuration is a low drag thin disc which, when combined with a specially designed flotation chamber, embodies a flotation machine which produces higher product yields over a wider range of feed size fractions utilizing significantly less energy than the devices of the prior art.
419390
Forsyth Robert H.
Weber Richard B.
Fetherstonhaugh & Co.
Zimpro
LandOfFree
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