EP0123501B1 - Wendelscheider mit einer Flüssigkeitsablenkvorrichtung - Google Patents

Wendelscheider mit einer Flüssigkeitsablenkvorrichtung Download PDF

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Publication number
EP0123501B1
EP0123501B1 EP19840302608 EP84302608A EP0123501B1 EP 0123501 B1 EP0123501 B1 EP 0123501B1 EP 19840302608 EP19840302608 EP 19840302608 EP 84302608 A EP84302608 A EP 84302608A EP 0123501 B1 EP0123501 B1 EP 0123501B1
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EP
European Patent Office
Prior art keywords
stream
spiral separator
separator according
deflector
trough
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP19840302608
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English (en)
French (fr)
Other versions
EP0123501A1 (de
Inventor
Philip John Giffard
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mineral Deposits Ltd
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Mineral Deposits Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mineral Deposits Ltd filed Critical Mineral Deposits Ltd
Priority claimed from AU27077/84A external-priority patent/AU575046B2/en
Publication of EP0123501A1 publication Critical patent/EP0123501A1/de
Application granted granted Critical
Publication of EP0123501B1 publication Critical patent/EP0123501B1/de
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B5/00—Washing granular, powdered or lumpy materials; Wet separating
    • B03B5/62—Washing granular, powdered or lumpy materials; Wet separating by hydraulic classifiers, e.g. of launder, tank, spiral or helical chute concentrator type
    • B03B5/626—Helical separators

Definitions

  • This invention relates to an improved spiral separator and to a method of spiral separation which is of particular use in the separation of minerals.
  • Spiral separators are extensively used for the wet gravity separation of solids according to their specific gravity, for example for separating various kinds of mineral sands from silica sands.
  • Such separators commonly comprise a vertical column about which there are supported one or more helical troughs.
  • a "pulp" or slurry of the materials to be separated and water is introduced to the upper end of a trough and as the pulp descends the helix, centrifugal forces act on the less dense particles in a radially outwards direction while the more dense particles segregate to the bottom of the flow and after slowing through close approach to the working surface of the trough gravitate towards the vertical column.
  • CA-A-961005 discloses a spiral separator in which fresh water from a separate channel of the trough is fed into the main channel of the trough to replace water which has been lost in extracting particulate material from the separator.
  • a spiral separator including at least one helical trough having a trough floor extending between an inner periphery and an outer periphery, said trough being arranged to receive a pulp stream of water and particles at its upper end and to separate particles of different densities as the stream moves downwardly along said trough, said separator being characterised by the inclusion of at least one deflector located adjacent said outer periphery and having at least one surface contoured for deflecting a portion of the low solids high velocity stream component in a fan-like spray from the outer periphery of the pulp stream back across said stream towards said inner periphery.
  • a method for rediluting a pulp stream flowing downwardly along the helical trough of a spiral separator comprising the deflection of a portion of the low solids high velocity stream component in a fan-like spray from the outer periphery of said pulp stream back across said stream towards its inner periphery.
  • an adjustable deflector is located on an outer wall of the helical trough to deflect the stream component in said fan-like spray. This is not the same mechanism as a normal wash water supply which is deliberately applied as small radial outflow across the segregated stream.
  • the spiral separator 1 includes helical trough 2 supported from a vertical column 3.
  • the helical trough 2 in cross-section comprises an upright inner wall 4, a support web 5 whereby the lip of the inner wall 4 is connected with the column 1, an upright outer wall 6 terminating in a lip 7 and a trough floor 8 extending between the inner wall 4 and the outer wall 6.
  • the trough working surface comprises an inner portion 9 and an outer portion 10 inclined at a greater angle to the helix radial direction and thus slopes more steeply upwardly and outwardly.
  • the profile of the bottom of the trough is such that the mass of water in the slurry moves radially outward and upward. This causes thinning of the water layer at the inner portion 11 of the flow and a water build-up at the low solids, high velocity stream at the flow periphery 12.
  • a deflector 13 is attached to the outer wall 6 to deflect a portion of the water from the flow periphery 12 into the inner portion 11 to reinstate the water quantities necessary to permit the designed separation mechanism to proceed.
  • the deflector 13 is adjustable by rotation about a radial axis 14 and has an under-surface 15 suitably contoured to deflect the water in a fan-like spray 16 across the trough.
  • the undersurface 15 is arcuate in contour when viewed in both radial and tangential directions with respect to the trough.
  • the deflector 13 preferably permits the stream to be rediluted to a considerable depth and across a broad band at the inner portion 9 of the trough floor.
  • the sharpened leading end 17 of the deflector 13 points upstream and the degree of redilution may be controlled by rotation of the deflector 13 about the axis 14.
  • the outer surface 18 of the deflector 13 is contoured generally to conform to the trough wall 6 and to permit rotation of the deflector 13 over the range required.
  • the axis 14 may be spaced at any desired distance from the leading end 17 of the deflector 13 depending upon the amount of deflection required.
  • FIG. 3 to 6 A second embodiment of the invention is shown in Figures 3 to 6 where corresponding features have been given corresponding reference numerals for ease of description.
  • the helical trough descends in a lefthand spiral rather than the right-hand spiral of the first embodiment.
  • the flow is deflected predominantly from the inwardly directed concave surface 15 which extends from the leading end 17 where it is tangential to the stream to a trailing end 18 where it is directed radially inwardly.
  • the flow can also be deflected from the upper surface 19 in a fan-like spray from its trailing end 20. In other embodimemts the flow can be deflected entirely from the upper surface.
  • the deflector of the second embodiment may also be adjustable as previously described but is illustrated in a fixed position on the trough wall, just beneath a flexible edge cover 21 with its lower surface 22 spaced above the trough floor to allow solids to pass under the deflector.
  • the tapered configuration of the deflector with its sharpened leading end provides no abrupt edge which would otherwise tend to collect rubbish.

Landscapes

  • Cyclones (AREA)
  • Centrifugal Separators (AREA)

Claims (20)

1. Wendelscheider (1) mit mindestens einer schraubenförmigen Rinne (2), deren Rinnenboden (8) sich zwischen einem Innenrand (4) und einem Außenrand (6) erstreckt, wobei diese Rinne (2) zur Aufnahme eines Pulpenstroms von Wasser und Partikeln an ihrem oberen Ende und zur Abtrennung von Partikeln verschiedener Dichte, während der Strom abwärts entlang der Rinne (2) fließt, eingerichtet ist, dadurch gekennzeichnet, daß der Wendelscheider (1) zumindest eine Ablenkvorrichtung (13) anliegend an dem Außenrand (6) mit einer Oberfläche enthält, die so gestaltet ist, daß ein Teil der Niedrigfestkörper-Hochgeschwindigkeitsstromkomponente in ein fächerförmiges Strahlenbündel (16) von dem Außenrand des Pulpenstromes zurück über den Strom hinweg zu dem Innenrand hin gelenkt wird.
2. Wendelscheider nach Anspruch 1, dadurch gekennzeichnet, daß der Außenrand durch eine Außenwand (6) gebildet wird und die Ablenkvorrichtung (13) sich an der Wand (6) befindet.
3. Wendelscheider nach Anspruch 2, dadurch gekennzeichnet, daß die Ablenkvorrichtung (13) eine äußere Oberfläche (18) hat, die so geformt ist, daß sie sich der Außenwand (6) anpaßt.
4. Wendelscheider nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Ablenkvorrichtung (13) verstellbar ist, um die Menge des abgelenkten Stroms zu verändern.
5. Wendelscheider nach Anspruch 4, dadurch gekennzeichnet, daß die Ablenkvorrichtung (13) zur Rotation um eine Achse (14), die sich radial zur Rinne (2) erstreckt, angeordnet ist, um dadurch die Merrge des abgelenkten Stroms zu verändern.
6. Wendelscheider nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Ablenkvorrichtung (13) eine geformte Unterseite (15) hat, um den Strom als das fächerförmige Strahlenbündel (16) abzulenken.
7. Wendelscheider nach Anspruch 6, dadurch gekennzeichnet, daß die Unterseite (15) eine gekrümmte Kontur hat, und zwar sowohl radial als auch tangential in Bezug auf die Rinne (2) betrachtet.
8. Wendelscheider nach Anspruch 7, dadurch gekennzeichnet, daß die Ablenkvorrichtung (13) ein scharf zulaufendes Ende (17) hat, das stromaufwärts zweigt.
9. Wendelscheider nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß der Rinnenboden (8) einen Bereich (10) hat, der nahe am Außenrand steiler abfällt.
10. Wendelscheider nach Anspruch 9, dadurch gekennzeichnet, daß der Rinnenboden (8) einen inneren Bereich (9) angrenzend an den Innenrand und einen steiler geneigten äußeren Bereich (10) zwischen dem inneren Bereich und dem Außenrand einschließt.
11. Wendelscheider nach Anspruch 10, dadurch gekennzeichnet, daß die Ablenkvorrichtung (13) die genannte Strom-Komponente im wesentlichlen zum inneren Bereich (9) hin ablenken kann, um den Pulpenstrom auf eine nennenswerte Tiefe über den inneren Bereich (9) hinweg zurückzuverdünnen.
12. Wendelscheider nach einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, daß die Ablenkvorrichtung (13) eine geformte obere Fläche (19) hat, um den Strom in ein fächerförmiges Strahlenbündel abzulenken.
13. Wendelscheider nach Anspruch 12, dadurch gekennzeichnet, daß die Ablenkvorrichtung (13) auch eine nach innen gerichtete geformte Fläche (18) hat, um den Strom in einen fächerförmigen Strahlenbündel abzulenken.
14. Wendelscheider nach Anspruch 13, dadurch gekennzeichnet, daß die nach innen gerichtete Fläche (18) sich von einem Führungsende (17) aus, wo sie tangential zum Strom ist, zu einer hinteren Kante hin fortsetzt, wo sie radial nach innen gerichtet ist.
15. Wendelscheider nach Anspruch 14, dadurch gekennzeichnet, daß die nach innen gerichtete Fläche (18) konkav ist.
16. Wendelscheider nach Anspruch 12, dadurch gekennzeichnet, daß die Ablenkvorrichtung (13) eine scharfe Führungskante hat, die stromaufwärts zeigt.
17. Wendelscheider nach Anspruch 6, dadurch gekennzeichnet, daß die Unterseite (15) konkav ist.
18. Wendelscheider nach Anspruch 17, dadurch gekennzeichnet, daß die Unterseite (15) sich von einem Führungsende aus, wo sie tangential zum Strom ist, hin zu einer hinteren Kante, wo sie radial nach innen gerichtet ist, fortsetzt.
19. Verfahren zur Rückverdünnung eines Pulpenstromes, der abwärts entlang einer schraubenförmigen Rinne (2) eines Wendel scheiders (1) fließt, dadurch gekennzeichnet, daß ein Teil der Niedrigfestkörper-Hochgeschwindigkeitsstromkomponenten in ein fächerartiges Strahlenbündel von dem Außenrand des Pulpenstroms zurück über den Strom hinweg zum Innenrand hin abgelenkt wird.
20. Verfahren nach Anspruch 19, dadurch gekennzeichnet, daß ein wesentlicher Teil der Strom-Komponente zu dem Innenrand hin in ein fächerförmiges Strahlenbündel abgelenkt wird, um den Pulpenstrom auf einen stetigen Pegel zurückzuverdünnen.
EP19840302608 1983-04-18 1984-04-17 Wendelscheider mit einer Flüssigkeitsablenkvorrichtung Expired EP0123501B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AUPF893683 1983-04-18
AU8936/83 1983-04-18
AU27077/84A AU575046B2 (en) 1983-04-18 1984-04-18 Spiral separator incorporating fluid deflector

Publications (2)

Publication Number Publication Date
EP0123501A1 EP0123501A1 (de) 1984-10-31
EP0123501B1 true EP0123501B1 (de) 1987-07-15

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EP19840302608 Expired EP0123501B1 (de) 1983-04-18 1984-04-17 Wendelscheider mit einer Flüssigkeitsablenkvorrichtung

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EP (1) EP0123501B1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7686170B2 (en) * 2002-05-17 2010-03-30 Edi Rail Pty Ltd Deflector for spiral separator, and method of spiral separation
CN102240593A (zh) * 2011-06-21 2011-11-16 广州粤有研矿物资源科技有限公司 一种螺旋选矿机

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB586777A (en) * 1944-10-17 1947-03-31 Ira Boyd Humphreys Concentrator and method of concentration
US3891546A (en) * 1971-09-08 1975-06-24 Ira B Humphreys Helical chute concentrator and method of concentrating
US3753491A (en) * 1971-12-28 1973-08-21 United States Steel Corp Apparatus for supplying wash water to a spiral concentrator
CA961005A (en) * 1972-08-22 1975-01-14 Ronald G. Fuller Helical concentrator with restraining lip
NZ199986A (en) * 1981-03-18 1985-07-31 Mineral Deposits Ltd Spiral separator:profile of working surface varies as spiral descends

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EP0123501A1 (de) 1984-10-31

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