GB1526050A - Method of and apparatus for sifting particulate material in a cross-current - Google Patents

Method of and apparatus for sifting particulate material in a cross-current

Info

Publication number
GB1526050A
GB1526050A GB3807875A GB3807875A GB1526050A GB 1526050 A GB1526050 A GB 1526050A GB 3807875 A GB3807875 A GB 3807875A GB 3807875 A GB3807875 A GB 3807875A GB 1526050 A GB1526050 A GB 1526050A
Authority
GB
United Kingdom
Prior art keywords
sifting
zone
gas
fed
particulate material
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
GB3807875A
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.)
Individual
Original Assignee
Individual
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
Priority claimed from DE19742444378 external-priority patent/DE2444378C3/en
Application filed by Individual filed Critical Individual
Publication of GB1526050A publication Critical patent/GB1526050A/en
Expired legal-status Critical Current

Links

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
    • B07B7/00—Selective separation of solid materials carried by, or dispersed in, gas currents
    • B07B7/02—Selective separation of solid materials carried by, or dispersed in, gas currents by reversal of direction of flow
    • 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
    • B07B4/00—Separating solids from solids by subjecting their mixture to gas currents
    • B07B4/02—Separating solids from solids by subjecting their mixture to gas currents while the mixtures fall
    • B07B4/025—Separating solids from solids by subjecting their mixture to gas currents while the mixtures fall the material being slingered or fled out horizontally before falling, e.g. by dispersing elements

Landscapes

  • Combined Means For Separation Of Solids (AREA)

Abstract

1526050 Pneumatic separation H RUMPF 16 Sept 1975 [17 Sept 1974] 38078/75 Heading B2H A method of classifying particulate material below 1mm in size comprises projecting the material in a thin layer and at a velocity greater than 5m/sec into a sifting gas current E directed transversely to the initial direction of proiection of the material so that the material is spread out by the current and is separated into two or more fractions by one or more blades 11, 15, 26, 48, 49 without previously rebounding from any wall, and withdrawing a portion T of the sifting gas immediately after the material charging point and in a direction having a component directed opposite to the material input direction. In the embodiment shown in Fig. 2, the particulate material is projected into the sifting zone 2 by means of two conveyor belts 6 and 7. The sifting gas enters the zone 2 via a flow straightener 5 and nozzle 4 and leaves via ducts 1 and 14. The fine material passes into the duct 14, the middle material into the duct 1, and the coarse material is collected in a receptacle 10 which in a modification, is provided with an air outlet (33) Fig. 4 (not shown). The positions of the blades 11 and 15 are adjustable. In the embodiment shown in Fig. 3, the material is fed to the sifting zone 2 by a pneumatic device 20 comprising a hopper 22 and an injector nozzle 23. One or other of the middle fractions may be returned to the sifting zone to improve the separation. In the embodiment shown in Fig. 5, the material is fed to an annular sifting zone by a centrifugal plate 42 and the sifting gas is fed to the said zone through two coaxial annular nozzles 43 and 44. In another embodiment, Fig. 6 (not shown), the sifting gas flows upwardly to and from an annular sifting zone. Some of the sifting gas e.g. that carrying away the middle fraction, may be recirculated to the sifting zone after removal of the particulate material therefrom Fig. 7 (not shown).
GB3807875A 1974-09-17 1975-09-16 Method of and apparatus for sifting particulate material in a cross-current Expired GB1526050A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19742444378 DE2444378C3 (en) 1974-09-17 Method and device for sifting granular material in a cross-flow

Publications (1)

Publication Number Publication Date
GB1526050A true GB1526050A (en) 1978-09-27

Family

ID=5925981

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3807875A Expired GB1526050A (en) 1974-09-17 1975-09-16 Method of and apparatus for sifting particulate material in a cross-current

Country Status (6)

Country Link
JP (1) JPS5156057A (en)
CA (1) CA1025807A (en)
CH (1) CH604934A5 (en)
DK (1) DK415575A (en)
FR (1) FR2285191A1 (en)
GB (1) GB1526050A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110947627A (en) * 2019-11-22 2020-04-03 四川衡工智造科技有限公司 Integrated solid particle conveying and separating system
CN111974682A (en) * 2020-08-25 2020-11-24 中国石油大学(北京) Particle grading device

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6589701B2 (en) 2000-07-28 2003-07-08 Canon Kabushiki Kaisha Dry toner, image forming method and process cartridge

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1624518A (en) * 1925-12-10 1927-04-12 Albert H Stebbins Air-blast classifier
US2466491A (en) * 1943-09-10 1949-04-05 Alfred D Sinden Process and apparatus for classifying materials
DE1407950A1 (en) * 1963-10-11 1969-05-08 Bayer Ag Process for separating specifically heavier particles from flowing media
CH465534A (en) * 1963-12-20 1968-11-30 Rumpf Hans Prof Ing Dr Method and device for sifting granular material in a cross flow
CH482471A (en) * 1963-12-20 1969-12-15 Rumpf Hans Prof Ing Dr Method and device for sifting granular material in the cross flow for separation limits below 1 mm
JPS4421415Y1 (en) * 1968-12-28 1969-09-10

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110947627A (en) * 2019-11-22 2020-04-03 四川衡工智造科技有限公司 Integrated solid particle conveying and separating system
CN110947627B (en) * 2019-11-22 2024-05-17 四川衡工智造科技有限公司 Integrated solid particle conveying and separating system
CN111974682A (en) * 2020-08-25 2020-11-24 中国石油大学(北京) Particle grading device
CN111974682B (en) * 2020-08-25 2024-06-04 中国石油大学(北京) Particle classification device

Also Published As

Publication number Publication date
DE2444378A1 (en) 1976-04-01
CA1025807A (en) 1978-02-07
DK415575A (en) 1976-03-18
DE2444378B2 (en) 1976-07-15
JPS5156057A (en) 1976-05-17
FR2285191A1 (en) 1976-04-16
CH604934A5 (en) 1978-09-15
JPS5424745B2 (en) 1979-08-23
FR2285191B1 (en) 1981-08-07

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19940916