EP0247844A2 - Procédé et dispositif pour séparer deux composants solides en suspension dans un liquide - Google Patents

Procédé et dispositif pour séparer deux composants solides en suspension dans un liquide Download PDF

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Publication number
EP0247844A2
EP0247844A2 EP87304681A EP87304681A EP0247844A2 EP 0247844 A2 EP0247844 A2 EP 0247844A2 EP 87304681 A EP87304681 A EP 87304681A EP 87304681 A EP87304681 A EP 87304681A EP 0247844 A2 EP0247844 A2 EP 0247844A2
Authority
EP
European Patent Office
Prior art keywords
cloth
liquid
separating region
fluidising
solid component
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.)
Withdrawn
Application number
EP87304681A
Other languages
German (de)
English (en)
Other versions
EP0247844A3 (fr
Inventor
James Anthony Tumilty
Paul Kaye
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.)
Anglo American Corp of South Africa Ltd
Original Assignee
Anglo American Corp of South Africa 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 Anglo American Corp of South Africa Ltd filed Critical Anglo American Corp of South Africa Ltd
Publication of EP0247844A2 publication Critical patent/EP0247844A2/fr
Publication of EP0247844A3 publication Critical patent/EP0247844A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
    • B07B1/50—Cleaning
    • B07B1/55—Cleaning with fluid jets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/10—Screens in the form of endless moving bands

Definitions

  • This invention relates to a method of and an apparatus for separating a first solid component from a mixture thereof with a liquid and a second solid component, the first and second solid components being in suspension in the liquid.
  • the invention provides a method of separating a first solid component from a mixture thereof with a liquid and a second solid component which is of smaller average particle size than the first solid component which includes
  • the invention provides a separator for separating a first solid component from a mixture thereof with a liquid and a second solid component which is of smaller average particle size than the first solid component, which includes
  • the fluidising liquid may be sprayed against the cloth, downstream of where the material is being fed onto the cloth and where the cloth is still in an operative separating region.
  • the material may pass through the cloth under the action only of gravity without utilising an artificially created vacuum.
  • the second component collecting means in the form of a trough, is then located below the cloth in the operative separating region.
  • the mixture may then be fed onto a downstream portion of the operative separating region by means of a feed box located above the cloth. Jets may then be provided below the cloth in another part of the operative separating region to spray fluidising liquid, which may be water, against the cloth.
  • first component particles block the apertures.
  • Fluidising liquid sprayed from below dislodges these first component particles and fluidises material on the cloth, thereby permitting more of the second component particles to pass through the cloth.
  • First component particles again block the apertures, trapping second component particles remaining above the first component particles that are blocking the apertures. The process can be repeated, with more of the second component particles passing through the cloth.
  • the fluidising spray is vertically upwards, with the cloth extending horizontally, then the particles tend to move at right angles to the cloth and abrasion wear of the cloth is reduced. As the passage of particles through the cloth is lubricated by fluid, wear of the cloth is also reduced thereby.
  • the cloth may be of any suitable material. Thus, it may be of stainless steel strands, stainless steel strands that are coated with a synthetic rubber or plastics material or it may be of a synthetic monofilament fabric.
  • the cloth may also be of a woven material and it may be of a single, double or triple layer fabric.
  • the cloth is also referred to in the art as a screen, and the term "cloth" includes screens and the like.
  • first solid component and the second solid component may be particles of different size, shape or configuration although they are of the same material. Thus, coarse particles may be removed from a slurry after a milling operation. Instead, they may be different materials.
  • the first solid component may be wood chips and the second solid component may be a gold- bearing chemical composition. It will also be appreciated that the first solid component that is retained on the cloth is subsequently removed by any suitable process which may be a mechanical process.
  • a separator is shown therein, designated generally by reference numeral 10.
  • the separator 10 has an endless cloth 12 which is supported on a number of support rollers 14 to define a horizontal separating region and also passes over a number of other rollers, including a drive roller 16. Beneath the support rollers 14 there is a collecting trough 18 which has an outlet 20.
  • Material that is to be separated is fed onto the cloth by means of a feedbox 22.
  • the feedbox 22 has a floor that has a number of apertures that are distributed over substantially the entire floor. The floor is spaced few centimetres from the cloth 12, and extends over about one quarter of the operative separating region.
  • the feedbox 22 feeds material to be separated, in a distributed manner, across the width of the cloth 12 on to the upstream quarter of the operative separating region.
  • the feedbox 22 may have an overflow weir.
  • the cloth 12 is made from stainless steel strands that are covered with polyurethane.
  • the cloth has apertures of a suitable size depending on the application for which it is intended. For the particular application in question i.e. for removing coarse particles from a slurry after a milling operation, the cloth has apertures of 180 micrometres.
  • a row of sprays 36 is located below the cloth 12 to spray water against and through the cloth 12 from below.
  • water sprayed from below by the sprays 36 dislodges first component particles and fluidizes material on the cloth 12. As the cloth 12 moves to an adjacent downstream position, more second component material passes through the cloth 12 and is collected in the trough 18. Again, first component particles block the apertures trapping the remaining second particles on the cloth 12. A further short distance downstream of the sprays 36, a further row of sprays 40 is provided below the cloth.
  • a final row of sprays 42 is located a short distance upstream of the roller 16 to provide a final dislodging and fluidisation with resulting further separation.
  • the number of rows of sprays 36, 40 and 42 depends upon the application and the sharpness of separation required.
  • Particles remaining on the cloth 12 fall off, or are washed off by sprays 38, to be collected in a trough 30.
  • the cloth 12 is driven at a speed of between 5 and 30 metres per minute with a feed rate of dry solids of about 0.6 tons per hour with the percentage of solids in the feed being in the region of 40%. Water to dislodge and fluidise the particles supplied at a rate of between 1 and 10 cubic metres an hour.

Landscapes

  • Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
  • Treatment Of Fiber Materials (AREA)
EP87304681A 1986-05-27 1987-05-27 Procédé et dispositif pour séparer deux composants solides en suspension dans un liquide Withdrawn EP0247844A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ZA863945 1986-05-27
ZA863945 1986-05-27

Publications (2)

Publication Number Publication Date
EP0247844A2 true EP0247844A2 (fr) 1987-12-02
EP0247844A3 EP0247844A3 (fr) 1988-11-02

Family

ID=25578419

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87304681A Withdrawn EP0247844A3 (fr) 1986-05-27 1987-05-27 Procédé et dispositif pour séparer deux composants solides en suspension dans un liquide

Country Status (5)

Country Link
EP (1) EP0247844A3 (fr)
AU (1) AU589009B2 (fr)
BR (1) BR8702721A (fr)
FI (1) FI872331A (fr)
ZW (1) ZW9787A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2237521A (en) * 1989-11-03 1991-05-08 Rig Technology Ltd Screen spray system
US5045181A (en) * 1989-09-07 1991-09-03 Beloit Corporation Apparatus for removing ash from repulped wastepaper
CN108435406A (zh) * 2018-04-04 2018-08-24 中国矿业大学 一种具有稳定流化环境的粗煤泥分选装置
EP3670760A3 (fr) * 2018-12-21 2020-08-19 ESI Pipeline Services, Inc. Machine de rembourrage

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI81019C (fi) * 1988-10-13 1992-03-24 Sunds Defibrator Rauma Oy Foerfarande och anordning foer filtrering av suspension.

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2351717A2 (fr) * 1976-05-18 1977-12-16 Rech Geolog Miniere Procede et appareil de separation granulometrique de materiaux granuleux, pulverulents ou arcileux
GB2001872A (en) * 1977-08-02 1979-02-14 Perez Canales C Screening device for bulk mineral material in powder or granular form
EP0166610A2 (fr) * 1984-06-27 1986-01-02 Anglo American Corporation of South Africa Limited Appareil et procédé de séparation d'un composant solide d'un autre composant solide en suspension dans un liquide

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3437571A (en) * 1964-07-20 1969-04-08 Int Nickel Co Production of electrolytic nickel
US3497062A (en) * 1967-07-19 1970-02-24 Joseph Almont Carlani Jr Waste disposal system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2351717A2 (fr) * 1976-05-18 1977-12-16 Rech Geolog Miniere Procede et appareil de separation granulometrique de materiaux granuleux, pulverulents ou arcileux
GB2001872A (en) * 1977-08-02 1979-02-14 Perez Canales C Screening device for bulk mineral material in powder or granular form
EP0166610A2 (fr) * 1984-06-27 1986-01-02 Anglo American Corporation of South Africa Limited Appareil et procédé de séparation d'un composant solide d'un autre composant solide en suspension dans un liquide

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5045181A (en) * 1989-09-07 1991-09-03 Beloit Corporation Apparatus for removing ash from repulped wastepaper
GB2237521A (en) * 1989-11-03 1991-05-08 Rig Technology Ltd Screen spray system
GB2237521B (en) * 1989-11-03 1993-03-24 Rig Technology Ltd Screen spray system
CN108435406A (zh) * 2018-04-04 2018-08-24 中国矿业大学 一种具有稳定流化环境的粗煤泥分选装置
CN108435406B (zh) * 2018-04-04 2024-03-15 中国矿业大学 一种具有稳定流化环境的粗煤泥分选装置
EP3670760A3 (fr) * 2018-12-21 2020-08-19 ESI Pipeline Services, Inc. Machine de rembourrage
US11421398B2 (en) 2018-12-21 2022-08-23 Esi Pipeline Services, Inc. Padding machine

Also Published As

Publication number Publication date
EP0247844A3 (fr) 1988-11-02
AU7347587A (en) 1987-12-03
FI872331A (fi) 1987-11-28
FI872331A0 (fi) 1987-05-26
AU589009B2 (en) 1989-09-28
ZW9787A1 (en) 1987-09-16
BR8702721A (pt) 1988-03-01

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Inventor name: KAYE, PAUL