Pneumatic flotation separation device

(19)

(11)

EP 1 084 753 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	09.01.2002 Bulletin 2002/02

(43)	Date of publication A2:
	21.03.2001 Bulletin 2001/12

(21)	Application number: 00307484.6

(22)	Date of filing: 31.08.2000

(51)	International Patent Classification (IPC)⁷: B03D 1/14

(84)	Designated Contracting States:
	AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
	Designated Extension States:
	AL LT LV MK RO SI

(30)

Priority:

14.09.1999 GB 9921716

(71)	Applicant: Maelgwyn Mineral Services Limited
	Llandudno, North Wales LL30 2PS (GB)

(72)	Inventor:
	Imhof, Rainer, Dr. 46282 Dorsten (DE)

(74)	Representative: Spencer, Michael David, Dr. et al
	Bromhead & Co., 37 Great James Street London WC1N 3HB London WC1N 3HB (GB)

(54)	Pneumatic flotation separation device

(57) A separating device (10) especially for use in a pneumatic flotation system comprises an annular channel (18), at least one nozzle (16) for introducing aerated pulp substantially horizontally and tangentially into the annular channel (18), froth extraction means (26) for the removal of separated froth from the annular channel (18), and pulp extraction means (24) for the removal of separated pulp from the annular channel (18), the at least one nozzle (16) being configured so that the aerated pulp introduced into the annular channel (18) rotates therein with centrifugal forces of between 5 and 20 ms^-2.

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