公开(公告)号：ZA9304949B

公开(公告)日：1994-01-31

申请号：ZA9304949

申请日：1993-07-09

Applicant: TECH RESOURCES PTY LTD

Inventor： BATTERHAM ROBIN JOHN ,  HOFFMANN WARWICH ARTHUR ,  CONOCHIE DAVID STEWART

IPC: B01F3/04 ,  B01F5/04 ,  B01F15/02 ,  B01J8/18 ,  B01J19/18 ,  B01F ,  C02F

CPC classification number: B01F5/0498 ,  B01F3/0451 ,  B01F3/04609 ,  B01F5/0413 ,  B01F5/0428 ,  B01F15/0201 ,  B01F2003/04865 ,  B01J8/1854 ,  B01J19/1875

公开(公告)号：ZA934949B

公开(公告)日：1994-01-31

申请号：ZA934949

申请日：1993-07-09

Applicant: TECH RESOURCES PTY LTD

Inventor： HOFFMANN WARWICH ARTHUR ,  CONOCHIE DAVID STEWART ,  BATTERHAM ROBIN JOHN

IPC: B01F3/04 ,  B01F5/04 ,  B01F15/02 ,  B01J8/18 ,  B01J19/18 ,  B01F ,  C02F

Abstract: A new aerator for perfusing a fluid with a gas has an inlet, an outlet and a central throat area with reduced cross-section in which the fluid pressure is reduced. The throat area is of elongated shape and is provided with a means for introducing the required gas. Also claimed is the procedure for aerating a fluid using this aerator. Gas is introduced via a row of nozzles or openings (1) or a porous membrane extending around the circumference of the throat area. A number of similar aerators may be used with a common fluid inlet and/or outlet. The flow of fluid is regulated to pass vertically through the throat area at a rate of at least 100 l/min. and preferably more than 200 l/min, and at a velocity of 1 to 10 m/s, and pref. 4 to 10 m/s. The fluid may in particular be an aq. extn. liq. and the gas air. The volumetric flow ratio of air to liquid is at least 0.2, and pref. more than 0.5, and esp. more than 0.7. The gas is introduced under the effect of natrual aspiration or under a slight pressure. USE/ADVANTAGE - Esp. for providing the required oxygen for the bacterial agents in biological extn. liqs. used for the extn. of ores. The aerator is economical to produce and to operate and achieves a high rate of aeration, thus reducing the cost of the aeration process.