Classifying – separating – and assorting solids – Fluid suspension – Liquid
Patent
1978-07-07
1980-10-07
Halper, Robert
Classifying, separating, and assorting solids
Fluid suspension
Liquid
209170, 210220, B03D 114
Patent
active
042267056
ABSTRACT:
A method of producing bubbles for treating a suspension by flotation, wherein in which the suspension enriched with dissolved gas is caused to flow into a flotation vat via a pipe the flow in the pipe is rapidly interrupted at a predetermined frequency by a shutter unit which is suddenly closed and produces, in the downstream portion of the pipe, a periodic wave of low pressure such that cavitation bubbles are produced in the flow in said downstream portion, the low pressure wave propagating in the pipe up to the flotation vat where it is reflected as a wave of high pressure which produces the collapse of the cavitation bubbles and forms micro-bubbles which become fixed to the particles to be floated, the conditions in the pipe being such that the micro-bubbles are in a super-saturated medium in relation to the local pressure conditions and tend to be enlarged during their flow up to the flotation vat.
REFERENCES:
patent: 1240824 (1917-09-01), Clauson
patent: 1515942 (1924-11-01), Eldred
patent: 1706281 (1929-03-01), Elmore
patent: 2093898 (1937-09-01), Taplin
patent: 2142207 (1939-11-01), Price
patent: 2995497 (1961-08-01), Heden
patent: 3246761 (1966-09-01), Bryan
patent: 3628775 (1971-12-01), McConnell
Alsthom-Atlantique
Halper Robert
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