FR2283726A2 - Rotary mill for fragmenting plastics materials - with vane profile modified to minimise friction and erosion losses - Google Patents

Rotary mill for fragmenting plastics materials - with vane profile modified to minimise friction and erosion losses

Info

Publication number
FR2283726A2
FR2283726A2 FR7430243A FR7430243A FR2283726A2 FR 2283726 A2 FR2283726 A2 FR 2283726A2 FR 7430243 A FR7430243 A FR 7430243A FR 7430243 A FR7430243 A FR 7430243A FR 2283726 A2 FR2283726 A2 FR 2283726A2
Authority
FR
France
Prior art keywords
rotor
matl
vanes
particles
erosion
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.)
Granted
Application number
FR7430243A
Other languages
French (fr)
Other versions
FR2283726B2 (en
Inventor
Jacques Roussel
Georges Perrin
Jean-Claude Villard
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.)
Air Liquide SA
Original Assignee
Air Liquide SA
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 Air Liquide SA filed Critical Air Liquide SA
Priority to FR7430243A priority Critical patent/FR2283726A2/en
Publication of FR2283726A2 publication Critical patent/FR2283726A2/en
Application granted granted Critical
Publication of FR2283726B2 publication Critical patent/FR2283726B2/fr
Granted legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
    • B02C13/14—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices
    • B02C13/18—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices with beaters rigidly connected to the rotor
    • B02C13/1807—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices with beaters rigidly connected to the rotor the material to be crushed being thrown against an anvil or impact plate
    • B02C13/1835—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices with beaters rigidly connected to the rotor the material to be crushed being thrown against an anvil or impact plate by means of beater or impeller elements fixed in between an upper and lower rotor disc
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C19/00—Other disintegrating devices or methods
    • B02C19/18—Use of auxiliary physical effects, e.g. ultrasonics, irradiation, for disintegrating
    • B02C19/186—Use of cold or heat for disintegrating

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Crushing And Pulverization Processes (AREA)

Abstract

In a mill for fragmentation of solid matls., the feed matl. is dropped coaxially on to a rotor with vanes which redirect the matl. radially outwards to impinge on an annular array of inclined. zig-zag panels acting as the impact surface. The particles travelling horizontally across the rotor are in contact with radially aligned surfaces. Friction losses between the particles and the rotor vanes reduce the ultimate impact speed and require the outer parts of the vanes to be detachable and replaceable to compensate for erosion. In the addn., the vane profile is modified so that the vane face approximates to the natural trajectory of matl. passing across and being accelerated by a spinning plate. Also the installation incorporating such a rotor may be modified so that the prodt. matl. is collected and fractionated in a cyclone, with oversize particles being automatically returned for further pass(es) through the fragmentation unit. The device is esp. suitable for pulverising plastics matls. at sub-ambient temps. Friction and erosion between the particles and the rotor vanes is minimised to what may be negligible levels. Higher impact energies are achieved for a given power input, since the kinetic energy of matl. impinging on the rotor is preserved, as well as being enhanced by spin-out.
FR7430243A 1974-09-06 1974-09-06 Rotary mill for fragmenting plastics materials - with vane profile modified to minimise friction and erosion losses Granted FR2283726A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7430243A FR2283726A2 (en) 1974-09-06 1974-09-06 Rotary mill for fragmenting plastics materials - with vane profile modified to minimise friction and erosion losses

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7430243A FR2283726A2 (en) 1974-09-06 1974-09-06 Rotary mill for fragmenting plastics materials - with vane profile modified to minimise friction and erosion losses

Publications (2)

Publication Number Publication Date
FR2283726A2 true FR2283726A2 (en) 1976-04-02
FR2283726B2 FR2283726B2 (en) 1977-10-28

Family

ID=9142837

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7430243A Granted FR2283726A2 (en) 1974-09-06 1974-09-06 Rotary mill for fragmenting plastics materials - with vane profile modified to minimise friction and erosion losses

Country Status (1)

Country Link
FR (1) FR2283726A2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4738403A (en) * 1986-02-10 1988-04-19 Framatome Wheel for a vacuum projection grinder
EP0750944A1 (en) * 1995-06-30 1997-01-02 Praxair Technology, Inc. Ultra-high energy cryogenic impact system

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
NEANT *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4738403A (en) * 1986-02-10 1988-04-19 Framatome Wheel for a vacuum projection grinder
EP0750944A1 (en) * 1995-06-30 1997-01-02 Praxair Technology, Inc. Ultra-high energy cryogenic impact system

Also Published As

Publication number Publication date
FR2283726B2 (en) 1977-10-28

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