EP 0364654 A3 19910123 - METHOD AND APPARATUS FOR GENERATING MICROBUBBLES IN FROTH FLOTATION MINERAL CONCENTRATION SYSTEMS
Title (en)
METHOD AND APPARATUS FOR GENERATING MICROBUBBLES IN FROTH FLOTATION MINERAL CONCENTRATION SYSTEMS
Publication
Application
Priority
US 26081388 A 19881021
Abstract (en)
[origin: EP0364654A2] A method and apparatus for generating microbubbles in a flowing liquid stream for use in a froth flotation system. The system utilizes a microbubble generator (50) having a tubular housing (53) with an inlet end (51) and an outlet end (52). Located coaxially within the housing (53) is an inner member (90) with an elongated exterior cylindrical surface. A porous tubular sleeve (80) is mounted between the housing (53) and the inner member (90) coaxially therewith to define with the cylindrical interior surface of the housing (53) an elongated air chamber (85) of annular cross section. The porous sleeve (80) also has a cylindrical inner surface that defines with the exterior surface of the inner member (90) an elongated liquid flow chamber (99) of thin, annular cross section. An aqueous liquid is supplied to the liquid flow chamber (99) at a relatively high flow rate and air under pressure is supplied to the air chamber (85) so that air is forced radially inwardly through the porous sleeve (80) to be diffused in the form of microbubbles in the flowing stream.
IPC 1-7
IPC 8 full level
B01F 3/04 (2006.01); B01F 5/04 (2006.01); B03D 1/24 (2006.01)
CPC (source: EP US)
B01F 23/231265 (2022.01 - EP); B01F 23/23211 (2022.01 - EP); B01F 23/2373 (2022.01 - EP); B01F 25/31421 (2022.01 - EP); B03D 1/1431 (2013.01 - EP); B03D 1/24 (2013.01 - EP US); B01F 23/23 (2022.01 - EP); B01F 23/23123 (2022.01 - EP US); B01F 2215/0431 (2013.01 - EP); B03D 1/028 (2013.01 - EP); B03D 1/1456 (2013.01 - EP)
Citation (search report)
- [X] GB 694918 A 19530729 - F S GIBBS INC
- [A] DE 2046254 A1 19710401 - ATOMIC ENERGY OF CANADA LTD
- [AD] US 4735709 A 19880405 - ZIPPERIAN DONALD E [US]
- [AD] US 2758714 A 19560814 - HOLLINGSWORTH CLINTON A
- [X] AUFBEREITUNGS TECHNIK. vol. 29, no. 8, August 1988, WIESBADEN DE pages 451 - 458; R. IMHOF: "Pneumatic flotation - a modern alternative"
Designated contracting state (EPC)
DE ES FR GB IT SE
DOCDB simple family (publication)
EP 0364654 A2 19900425; EP 0364654 A3 19910123; AU 2830689 A 19900426; FI 894972 A0 19891019; ZA 891489 B 19891129
DOCDB simple family (application)
EP 89103088 A 19890222; AU 2830689 A 19890106; FI 894972 A 19891019; ZA 891489 A 19890227