GB1368284A - Operation of jet mills - Google Patents

Operation of jet mills

Info

Publication number
GB1368284A
GB1368284A GB3840371A GB3840371A GB1368284A GB 1368284 A GB1368284 A GB 1368284A GB 3840371 A GB3840371 A GB 3840371A GB 3840371 A GB3840371 A GB 3840371A GB 1368284 A GB1368284 A GB 1368284A
Authority
GB
United Kingdom
Prior art keywords
bed
shown
jet
material
nozzle
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
GB3840371A
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.)
Alpine AG
Original Assignee
Alpine AG
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 to DE19702040519 priority Critical patent/DE2040519C2/de
Application filed by Alpine AG filed Critical Alpine AG
Publication of GB1368284A publication Critical patent/GB1368284A/en
Expired legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B02CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02CCRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C23/00Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
    • B02C23/08Separating or sorting of material, associated with crushing or disintegrating
    • B02C23/16Separating or sorting of material, associated with crushing or disintegrating with separator defining termination of crushing or disintegrating zone, e.g. screen denying egress of oversize material
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B02CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02CCRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C19/00Other disintegrating devices or methods
    • B02C19/06Jet mills
    • B02C19/068Jet mills of the fluidised-bed type
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B02CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02CCRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C23/00Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
    • B02C23/08Separating or sorting of material, associated with crushing or disintegrating
    • B02C23/10Separating or sorting of material, associated with crushing or disintegrating with separator arranged in discharge path of crushing or disintegrating zone
    • B02C23/12Separating or sorting of material, associated with crushing or disintegrating with separator arranged in discharge path of crushing or disintegrating zone with return of oversize material to crushing or disintegrating zone
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B02CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02CCRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C25/00Control arrangements specially adapted for crushing or disintegrating

Abstract

1368284 Jet mills; pneumatic and centrifugal separators ALPINE AG 16 Aug 1971 [14 Aug 1970] 38403/71 Headings B2A B2H and B2P A jet mill comprises a nozzle 3, Fig. 1, arranged at the bottom of a container 2 and receiving, e.g. compressed air via a chamber 4. A bed of material 5 is kept in continuous motion, e.g. by vibrating the container 2 by means of a vibrator 9, so that material continuously flows into the jet and ground material flows away from it. The disposition of the nozzle beneath the bed is such that the kenitic energy of the jet is substantially absorbed within the bed, comminuted material being fed to a separator or sifter operated independantly of the jet and arranged above the level of the bed of material. In a second embodiment, the bed is kept in motion by fluidising it, Fig. 2 (not shown), and the bed may be wide enough to prevent material being flung through the bed by the jet. The bed may be kept in motion by an agitator 17, Fig. 5, or by a bucket elevator 22 and chute 23, Fig. 6 or by a pneumatic conveyor, Fig. 7 (not shown). Various known separators may be used using bladed rotors, Fig. 9 (not shown), an arrangement of zig-zag pipes, Fig. 10 (not shown), a chamber 70 including adjustable guide blades 30, Fig. 8, with screw feed for material to be ground, or a chamber including propellant jets 41, Fig. 12. A simple riser tube may also be used as a separator, Fig. 13 (not shown). A rotary separator including a rotor and stator forming between them a zig-zag path (as seen in section) may be used, Fig. 14a. The nozzle may be closed by a pneumatically-actuated needle valve, Fig. 16 (not shown), when the mill is stopped or the supply of comminuting gas ceases. The nozzle 63 may be in the form of an adjustable slot, varied by displacing a plate 65 by means of a screw 66, Fig. 17. Alternatively a known annular slot nozzle may be used, Fig. 18 (not shown). The level of material may be detected by a probe or baffle plate controlling a switch, Fig. 19, (not shown). This may in turn regulate the rate of feed. The jet may be developed by the use of a gas turbine.
GB3840371A 1970-08-14 1971-08-16 Operation of jet mills Expired GB1368284A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19702040519 DE2040519C2 (en) 1970-08-14 1970-08-14

Publications (1)

Publication Number Publication Date
GB1368284A true GB1368284A (en) 1974-09-25

Family

ID=5779809

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3840371A Expired GB1368284A (en) 1970-08-14 1971-08-16 Operation of jet mills

Country Status (6)

Country Link
US (1) US3734413A (en)
AT (1) AT322952B (en)
DE (1) DE2040519C2 (en)
DK (1) DK147654C (en)
FR (1) FR2104091A5 (en)
GB (1) GB1368284A (en)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2526679B1 (en) * 1982-05-12 1988-04-08 Poittemill Broyeurs Improvements in mills jets
DE3338138C2 (en) * 1983-10-20 1986-01-16 Alpine Ag, 8900 Augsburg, De
DE4243438C2 (en) * 1992-12-22 1996-06-05 Hosokawa Alpine Ag Method and device for fluid bed jet grinding
GB9226994D0 (en) * 1992-12-24 1993-02-17 Tioxide Group Services Ltd Method of milling
DE19513034A1 (en) * 1995-04-06 1996-10-10 Nied Roland Fluid bed jet milling device
DE19513035C2 (en) * 1995-04-06 1998-07-30 Nied Roland Fluid bed jet grinding
ATA168197A (en) * 1997-10-03 1999-09-15 Holderbank Financ Glarus Method for grinding and lubricating granular ground material and blasting mill for carrying out this method
US6398139B1 (en) * 1999-08-23 2002-06-04 Roland Nied Process for fluidized-bed jet milling, device for carrying out this process and unit with such a device for carrying out this process
AT408343B (en) * 2000-01-12 2001-10-25 Holderbank Financ Glarus Method and device for crushing hot clinker
US7445806B2 (en) * 2004-09-02 2008-11-04 Kraft Foods Global Brands Llc Process for selective grinding and recovery of dual-density foods
DE102005036211A1 (en) 2005-08-02 2007-02-08 Lanxess Deutschland Gmbh Jet mill with integrated dynamic classifier
KR100807710B1 (en) 2005-08-18 2008-02-28 와커 헤미 아게 Process and apparatus for comminuting silicon
DE102005039118A1 (en) * 2005-08-18 2007-02-22 Wacker Chemie Ag Method and device for comminuting silicon
US8067051B2 (en) * 2006-06-19 2011-11-29 Kraft Foods R & D, Inc. Process for milling cocoa shells
CN101605598B (en) 2006-11-10 2014-03-12 新泽西理工学院 Fluidized bed systems and methods including secondary gas flow
DE102012111431A1 (en) * 2012-11-26 2014-05-28 Klafs Gmbh & Co. Kg micronizer
CN103008082B (en) * 2012-12-20 2016-01-20 富耐克超硬材料股份有限公司 Air flow crushing device and use airslide disintegrating mill, the pulverizing grading machine of this device

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1791100A (en) * 1928-02-16 1931-02-03 Henry G Lykken Reducing fluidizer and method of fluidizing
US1847009A (en) * 1928-02-23 1932-02-23 Babcock Und Wilcox Dampfkessel Impact mill
DE598421C (en) * 1932-01-18 1934-06-13 Internat Pulverizing Corp Method and apparatus for Prallzerkleinern
US1948609A (en) * 1932-01-18 1934-02-27 American Pulverizing Corp Method of pulverizing minerals and similar materials
US2072492A (en) * 1933-08-01 1937-03-02 Anger Paul Jet impact pulverizer
US2103454A (en) * 1933-09-18 1937-12-28 Hephaest A G Fur Motorische Kr Impact-crusher for comminuting hard materials
GB1044392A (en) * 1964-01-10 1966-09-28 Marchon Products Ltd Improvements in fluidised beds

Also Published As

Publication number Publication date
DK147654B (en) 1984-11-05
DE2040519C2 (en) 1984-04-12
DE2040519A1 (en) 1972-02-17
US3734413A (en) 1973-05-22
FR2104091A5 (en) 1972-04-14
DK147654C (en) 1985-04-29
AT322952B (en) 1975-06-25

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Legal Events

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