US4208276A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flotation plant
Assignee: Bergwerksverband GmbH
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Filing: 1979-01-26
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Granted: 1980-06-17
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Expires: 1999-01-26
Abstract
Abstract The invention is concerned with an improved flotation plant in which gassed solid particles can be removed from a carrying liquid stream by a separating means. The invention proposes curving the path along which the gassed stream passes upstream of the separating means to facilitate the separation of the gassed and ungassed components.
Inventors
- 👤 Albert Bahr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:54
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/14; B03D1/24; B03D1/26; B03D1/1412; B03D1/1418; B03D1/242
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
176 words
A flotation plant comprising: tubular flow means having a first inlet and an outlet, and adapted to receive a liquid stream containing a plurality of first solid particles to be floated and a plurality of second solid particles not to be floated, said flow means further having a uniform cross section configuration and at least one curved tubular separating stretch interposed said first inlet and said outlet; at least one second inlet mounted to said flow means downstream of said first inlet, said at least one second inlet being adapted to receive gases upstream of said separating stretch, wherein bubble/particle complexes are formed, which complexes comprise bubbles of said gases and said first solid particles; and a septum mounted integral said outlet such that said first solid particles associate with bubbles of said gases and form complexes in said stream, said complexes form a boundary layer to be separated on one side of said septum, and said stream containing said second particles form a boundary layer to be separated on the other side of said septum.
Claim 2
Dependent Claim
176 words
A flotation plant comprising: tubular flow means having a first inlet and an outlet, and adapted to receive a liquid stream containing a plurality of first solid particles to be floated and a plurality of second solid particles not to be floated, said flow means further having a uniform cross section configuration and at least one curved tubular separating stretch interposed said first inlet and said outlet; at least one second inlet mounted to said flow means downstream of said first inlet, said at least one second inlet being adapted to receive gases upstream of said separating stretch, wherein bubble/particle complexes are formed, which complexes comprise bubbles of said gases and said first solid particles; and a septum mounted integral said outlet such that said first solid particles associate with bubbles of said gases and form complexes in said stream, said complexes form a boundary layer to be separated on one side of said septum, and said stream containing said second particles form a boundary layer to be separated on the other side of said septum.
Claim 3
Dependent Claim
32 words
A plant according to claim 1, wherein said separating stretch further comprises means to maintain the liquid velocity downstream of said separating section proximate the liquid velocity upstream of said separating section.
Claim 4
Dependent Claim
20 words
A plant according to claim 1, wherein said separating stretch defines a tube in the form of a circular arc.
Claim 5
Dependent Claim
18 words
A plant according to claim 3, wherein the tube defining said separating stretch has a rectangular cross section.
Claim 6
Dependent Claim
24 words
A plant according to claim 3, wherein the tube defining said separating stretch encompasses more than half of a circle with its circular arc.
Claim 7
Dependent Claim
18 words
A plant according to claim 3, wherein the tube defining said separating stretch has an oval cross section.
Claim 8
Dependent Claim
18 words
A plant according to claim 3, wherein the tube defining said separating stretch has a circular cross section.
Claim 9
Dependent Claim
21 words
A plant according to claim 1 for coal processing, wherein both said first particles and said second particles are mineral particles.
Claim 10
Independent Claim
115 words
A method of separating first solid particles to be floated from a liquid stream containing said first particles and additionally containing second solid particles not to be floated, said method comprising the steps of: (a) flowing said liquid stream in a conduit having a uniform cross section configuration; (b) injecting a gas into said liquid stream in said conduit; (c) passing the combination of said liquid stream and said injected gas through a curved stretch of conduit whereby bubble/particle complexes are formed by association of bubbles of said gas with said first particles whereupon a boundary layer of said complexes forms in said liquid stream; and (d) separating said boundary layer from said liquid stream.
Claim 11
Independent Claim
115 words
A method of separating first solid particles to be floated from a liquid stream containing said first particles and additionally containing second solid particles not to be floated, said method comprising the steps of: (a) flowing said liquid stream in a conduit having a uniform cross section configuration; (b) injecting a gas into said liquid stream in said conduit; (c) passing the combination of said liquid stream and said injected gas through a curved stretch of conduit whereby bubble/particle complexes are formed by association of bubbles of said gas with said first particles whereupon a boundary layer of said complexes forms in said liquid stream; and (d) separating said boundary layer from said liquid stream.
Claim 12
Dependent Claim
46 words
A method according to claim 9, wherein the step of passing the combination of said liquid stream and said injected gas through a curved stretch of conduit further comprises maintaining the velocity of said stream about the same as the velocity upstream of said curved section.
Claim 13
Dependent Claim
19 words
A method according to claim 9, wherein said curved stretch of conduit comprises a tube defining a circular arc.
Claim 14
Dependent Claim
17 words
A method according to claim 11, wherein said curved stretch of conduit has a rectangular cross section.
Claim 15
Dependent Claim
17 words
A method according to claim 11, wherein said curved stretch of conduit has an oval cross section.
Claim 16
Dependent Claim
17 words
A method according to claim 11, wherein said curved stretch of conduit has a circular cross section.
Claim 17
Dependent Claim
16 words
A method according to claim 11, wherein said circular arc comprises more than half a circle.
Claim 18
Dependent Claim
22 words
A method according to claim 9 for coal processing, wherein both said first solid particles and second solid particles are mineral particles.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-06-17 | 1983-12-17 | 1984-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-06-17 | 1987-12-17 | 1988-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-06-17 | 1991-12-17 | 1992-06-17 | $7700.00 | Window Closed / Lapsed |