Classifying – separating – and assorting solids – Fluid suspension – Liquid
Patent
1996-06-05
1997-09-30
Lithgow, Thomas M.
Classifying, separating, and assorting solids
Fluid suspension
Liquid
209170, B03B 100, B03D 102, B03D 124
Patent
active
056722672
ABSTRACT:
A method and apparatus for separating particulate material. The method includes the steps of delivering a substantially constant supply of feed to a first aerator, aerating the substantially constant supply of feed in the first aerator, introducing the substantially constant supply of aerated feed to a flotation vessel below a froth/liquid interface within the vessel, so that floatable particulate material entrained by air bubbles from the first aerator can float upwardly to the froth/liquid interface. Air is introduced into the liquid phase in the flotation vessel via a second aerator located below the level at which the aerated feed is introduced into the flotation vessel, so that floatable particulate material not entrained by air bubbles from the first aerator, may be entrained by air bubbles from the second aerator, as the air bubbles from the second aerator rise upwardly through the liquid phase to the froth/liquid interface.
REFERENCES:
patent: 2142207 (1939-01-01), Price
patent: 3428175 (1969-02-01), Hukki
patent: 5116487 (1992-05-01), Parekh
patent: 5188726 (1993-02-01), Jameson
Changgen, Li and Bahr, A; "Flotation of Copper Ore in a Pneumatic Flotation Cell" Minerals and Metallurgical Processing Feb. 1992 pp. 7-12.
Lithgow Thomas M.
Multotec Cyclones (PTY) Limited
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