GB1036543A - - Google Patents
Info
- Publication number
- GB1036543A GB1036543A GB1036543DA GB1036543A GB 1036543 A GB1036543 A GB 1036543A GB 1036543D A GB1036543D A GB 1036543DA GB 1036543 A GB1036543 A GB 1036543A
- Authority
- GB
- United Kingdom
- Prior art keywords
- medium
- conical
- shaft
- fraction
- discharged
- 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.)
- Active
Links
Classifications
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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
- B03B5/28—Washing granular, powdered or lumpy materials; Wet separating by sink-float separation
- B03B5/30—Washing granular, powdered or lumpy materials; Wet separating by sink-float separation using heavy liquids or suspensions
- B03B5/32—Washing granular, powdered or lumpy materials; Wet separating by sink-float separation using heavy liquids or suspensions using centrifugal force
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/26—Separation of sediment aided by centrifugal force or centripetal force
- B01D21/262—Separation of sediment aided by centrifugal force or centripetal force by using a centrifuge
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/26—Separation of sediment aided by centrifugal force or centripetal force
- B01D21/267—Separation of sediment aided by centrifugal force or centripetal force by using a cyclone
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/30—Control equipment
- B01D21/34—Controlling the feed distribution; Controlling the liquid level ; Control of process parameters
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- 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
- B07B7/00—Selective separation of solid materials carried by, or dispersed in, gas currents
- B07B7/08—Selective separation of solid materials carried by, or dispersed in, gas currents using centrifugal force
- B07B7/083—Selective separation of solid materials carried by, or dispersed in, gas currents using centrifugal force generated by rotating vanes, discs, drums, or brushes
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
Abstract
1,036,543. Classifiers. INSINOORITOIMISTO-ENGINEERING BUREAU R. T. HUKKI. Feb. 1, 1965, No. 4227/65. Headings B2H and B2P. Solid particles in a carrier fluid medium are classified by means of a two-step process carried out in one and the same apparatus. In the first step, the feed material is separated into two fractions under turbulent, spirally flow conditions in the lower part of the apparatus and the coarse or heavy fraction is discharged as the final underflow product. In the second step, the remaining fraction is classified in the upper part of the apparatus into two new fractions in the same medium are radially inwardly and upwardly directed, relatively their coaxial layers under the influence of controlled centrifugal force. The suspended fine or light fraction is discharged as the final overflow product while the middling fraction, consisting of particles rejected by the centrifugal force, is returned back to the lower part of the apparatus and discharged with the underflow product. The carrier fluid medium may be a gas, a liquid (e.g. tetrabromoethane) or a suspension of fine solids in a liquid (e.g. fine ferrosilicon in water). The medium may be added with the feed, separately or both ways. The medium may have a specific gravity between those of the light and heavy fractions. A hydraulic classifier, Fig. 1, comprises a vessel having conical top and bottom portions 1, 3 and a cylindrical middle portion 2. Pulp is admitted via a pipe 8 into a hollow shaft 4 rotated by a pulley 6 and provided with a conical extension 9 to which is attached a solid shaft 10. The pulp is whirled in the conical portion 3 of the vessel by vanes 19 carried by the extension 9 and by an impeller 11 mounted on the shaft 10. Additional medium is introduced through tangential pipes 13. The separated coarse fraction is discharged with same medium through a manually or automatically controlled valve 12. The remainder of the pulp travels upwards into the vessel portion 2 where it passes between conical discs 14 mounted on the rotary shaft 4. The fine fraction and the bulk of the medium are discharged via an annular space 21 and a collar 22 into a launder 23 and finally through an outlet 24. The middlings separated out by centrifugal force are urged against the wall of the portion 2 and travel downwards in helical fashion into the portion 3 from which they are finally discharged through the valve 12. In a modification, Fig. 2 (not shown), the pulp is introduced in the upper part of the conical portion 3 via a tangential inlet pipe 26. The shaft 4 is solid and the extension 9, slight 10 and impeller 11 are omitted. The vanes 19 are attached to the lower conical member 15 supporting the discs 14. In another embodiment, Fig. 3 (not shown), the apparatus is constructed for pneumatic classification. The solid shaft 10 extends throughout the hollow shaft 4 in which it is mounted on bearings 29 and is rotated by a pulley 30 at a speed different from that of the shaft 4. The shaft 10 carries a conical member 31 and an impeller 11. The portion 3 of the vessel has a cylindrical extension 28 to form an elutriation column. Feed is admitted with gaseous medium through a tangential inlet pipe 26. Additional medium is introduced via a pipe 32 to wash the settling coarse fraction in countercurrent fashion first in the utriation column and then in the conical passage between the member 31 and the wall of the conical portion 3. The overflowing gaseous suspension is collected by a covered discharge means 33. In all the above embodiments, the walls of the vessel may be lined with wear resisting material, e.g. rubber and the discs may similarly be rubber covered on one or both sides and there surfaces may have additional design features to help classification. A number of classifiers may be connected in series or parallel.
Publications (1)
Publication Number | Publication Date |
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GB1036543A true GB1036543A (en) |
Family
ID=1755193
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1036543D Active GB1036543A (en) |
Country Status (1)
Country | Link |
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GB (1) | GB1036543A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2133722A (en) * | 1982-12-03 | 1984-08-01 | Clasicon | A classifying means |
GB2158741A (en) * | 1984-05-14 | 1985-11-20 | Hydro Int Ltd | Separation of components of a fluid mixture |
EP0638365A2 (en) * | 1993-08-07 | 1995-02-15 | Hosokawa Alpine Aktiengesellschaft | Method and device for separating fine-grained solids into two grain size fractions |
US5667075A (en) * | 1995-04-07 | 1997-09-16 | Hosokawa Alpine Aktiengesellschaft | Classifying wheel for centrifugal-wheel classifiers |
GB2352409A (en) * | 1999-07-27 | 2001-01-31 | Church Garry | Tangential flow separator with additional supply of liquid |
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0
- GB GB1036543D patent/GB1036543A/en active Active
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2133722A (en) * | 1982-12-03 | 1984-08-01 | Clasicon | A classifying means |
US4515689A (en) * | 1982-12-03 | 1985-05-07 | Clasicon (Proprietary) Limited | Classifying means |
GB2158741A (en) * | 1984-05-14 | 1985-11-20 | Hydro Int Ltd | Separation of components of a fluid mixture |
GB2189413A (en) * | 1984-05-14 | 1987-10-28 | Hydro Int Ltd | Separation of components of a fluid mixture |
US4747962A (en) * | 1984-05-14 | 1988-05-31 | Hydro International Limited | Separation of components of a fluid mixture |
EP0638365A2 (en) * | 1993-08-07 | 1995-02-15 | Hosokawa Alpine Aktiengesellschaft | Method and device for separating fine-grained solids into two grain size fractions |
EP0638365A3 (en) * | 1993-08-07 | 1995-09-13 | Hosokawa Alpine Ag | Method and device for separating fine-grained solids into two grain size fractions. |
US5894935A (en) * | 1993-08-07 | 1999-04-20 | Hosokawa Alpine Aktiengesellschaft | Method and device to separate a fine-grained solid material into two fractions |
CN1056787C (en) * | 1993-08-07 | 2000-09-27 | 霍索卡瓦阿尔彼股份公司及两合公司 | Method and device for separation of a fine grained solid matter into two particle fractions |
US5667075A (en) * | 1995-04-07 | 1997-09-16 | Hosokawa Alpine Aktiengesellschaft | Classifying wheel for centrifugal-wheel classifiers |
GB2352409A (en) * | 1999-07-27 | 2001-01-31 | Church Garry | Tangential flow separator with additional supply of liquid |
GB2352409B (en) * | 1999-07-27 | 2003-06-18 | Church Garry | Improvements in or relating to the cleaning of contaminated liquids |
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