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FR2456556A1 - Cryogenic grinding plant - uses cryogenic fluid e.g. liq. nitrogen to embrittle prod. being ground, with countercurrent and co-current gas recirculation - Google Patents

Cryogenic grinding plant - uses cryogenic fluid e.g. liq. nitrogen to embrittle prod. being ground, with countercurrent and co-current gas recirculation

Info

Publication number
FR2456556A1
FR2456556A1 FR7912728A FR7912728A FR2456556A1 FR 2456556 A1 FR2456556 A1 FR 2456556A1 FR 7912728 A FR7912728 A FR 7912728A FR 7912728 A FR7912728 A FR 7912728A FR 2456556 A1 FR2456556 A1 FR 2456556A1
Authority
FR
France
Prior art keywords
refrigeration
section
cryogenic fluid
prod
grinder
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Withdrawn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
FR7912728A
Other languages
French (fr)
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 FR7912728A priority Critical patent/FR2456556A1/en
Priority to ZA00802096A priority patent/ZA802096B/en
Priority to AU57403/80A priority patent/AU5740380A/en
Priority to IT8021519A priority patent/IT1140880B/en
Priority to ES491161A priority patent/ES8100907A1/en
Priority to DE19803018777 priority patent/DE3018777A1/en
Priority to BE0/200650A priority patent/BE883344A/en
Publication of FR2456556A1 publication Critical patent/FR2456556A1/en
Withdrawn legal-status Critical Current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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D3/00—Devices using other cold materials; Devices using cold-storage bodies
    • F25D3/10—Devices using other cold materials; Devices using cold-storage bodies using liquefied gases, e.g. liquid air
    • F25D3/11—Devices using other cold materials; Devices using cold-storage bodies using liquefied gases, e.g. liquid air with conveyors carrying articles to be cooled through the cooling space

Landscapes

  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Food Science & Technology (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Disintegrating Or Milling (AREA)

Abstract

Coryogenic grinding of prods. to obtain a powder with the use of a cryogenic fluid for embrittlement of the prod consists of displacing the prod. in an elongated refrigeration zone comprising an upstream pre-cooling section and a downstream refrigeration second. The refrigeration prods. are fed to a grinder with circulation of grinding gas, of which an excess part is evacuated countercurrent through the pre-cooling zone. The cryogenic fluid is fed into the refrigeration section zone and flows in this section cocurrent with the products to the grinder, the gas being recirculation, a part in the refrigeration section. Another part of the gas is circulated in the refrigeration section cocurrent with the prods, while a remaining part is recirculated downstream of the refrigeration section in the pipe connecting this section to the grinder. The method of introducing the cryogenic fluid and of recirculating the grinding gas gives a higher thermal efficiency than that of existing installations. There is no need to introduce the cryogenic fluid into the grinder itself.
FR7912728A 1979-05-18 1979-05-18 Cryogenic grinding plant - uses cryogenic fluid e.g. liq. nitrogen to embrittle prod. being ground, with countercurrent and co-current gas recirculation Withdrawn FR2456556A1 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
FR7912728A FR2456556A1 (en) 1979-05-18 1979-05-18 Cryogenic grinding plant - uses cryogenic fluid e.g. liq. nitrogen to embrittle prod. being ground, with countercurrent and co-current gas recirculation
ZA00802096A ZA802096B (en) 1979-05-18 1980-04-09 Methods of and apparatus for cryogenic crushing or grinding
AU57403/80A AU5740380A (en) 1979-05-18 1980-04-11 Cryogenic crushing
IT8021519A IT1140880B (en) 1979-05-18 1980-04-21 ORIOGENIC PROCESSING AND MILLING SYSTEM OF PRODUCTS
ES491161A ES8100907A1 (en) 1979-05-18 1980-05-05 Cryogenic grinding plant - uses cryogenic fluid e.g. liq. nitrogen to embrittle prod. being ground, with countercurrent and co-current gas recirculation
DE19803018777 DE3018777A1 (en) 1979-05-18 1980-05-16 METHOD FOR CRUSHING PRODUCTS AT DEEP TEMPERATURE AND SYSTEM FOR IMPLEMENTING THE METHOD
BE0/200650A BE883344A (en) 1979-05-18 1980-05-16 PROCESS AND PLANT FOR CRYOGENIC GRINDING OF PRODUCTS

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7912728A FR2456556A1 (en) 1979-05-18 1979-05-18 Cryogenic grinding plant - uses cryogenic fluid e.g. liq. nitrogen to embrittle prod. being ground, with countercurrent and co-current gas recirculation

Publications (1)

Publication Number Publication Date
FR2456556A1 true FR2456556A1 (en) 1980-12-12

Family

ID=9225646

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7912728A Withdrawn FR2456556A1 (en) 1979-05-18 1979-05-18 Cryogenic grinding plant - uses cryogenic fluid e.g. liq. nitrogen to embrittle prod. being ground, with countercurrent and co-current gas recirculation

Country Status (7)

Country Link
AU (1) AU5740380A (en)
BE (1) BE883344A (en)
DE (1) DE3018777A1 (en)
ES (1) ES8100907A1 (en)
FR (1) FR2456556A1 (en)
IT (1) IT1140880B (en)
ZA (1) ZA802096B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2566515A1 (en) * 1984-06-22 1985-12-27 Air Liquide METHOD AND INSTALLATION FOR COOLING BY MEANS OF A REFRIGERANT FLUID OF A POWDER
FR2567042A1 (en) * 1984-07-04 1986-01-10 Kohlensaeurewerk Deutschland Process for crushing (milling, pulverising) cell-containing material via explosion
WO2018218148A1 (en) * 2017-05-26 2018-11-29 Headspace International, Llc Cryogenic separation of plant material

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19533078A1 (en) * 1995-09-07 1997-03-13 Messer Griesheim Gmbh Method and device for grinding and classifying regrind
IL192797A (en) * 2008-07-14 2013-03-24 Ecotech Recycling Ltd Device and method for cooling solid particles
ES2606104B1 (en) * 2015-09-21 2017-12-29 Francisco Riera Berenguer Grinding system and micronization of plastics with cryogenic nitrogen system

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2609150A (en) * 1949-11-05 1952-09-02 Union Carbide & Carbon Corp Mechanical pulverization of refrigerated plastics
FR2087551A5 (en) * 1970-05-22 1971-12-31 Air Liquide Grinding eg rubbers - cooling with vapour from liquefied gas

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2609150A (en) * 1949-11-05 1952-09-02 Union Carbide & Carbon Corp Mechanical pulverization of refrigerated plastics
FR2087551A5 (en) * 1970-05-22 1971-12-31 Air Liquide Grinding eg rubbers - cooling with vapour from liquefied gas

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2566515A1 (en) * 1984-06-22 1985-12-27 Air Liquide METHOD AND INSTALLATION FOR COOLING BY MEANS OF A REFRIGERANT FLUID OF A POWDER
EP0166655A1 (en) * 1984-06-22 1986-01-02 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Process and apparatus for cooling a powder by means of a refrigerant fluid
US4619113A (en) * 1984-06-22 1986-10-28 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Process and installation for cooling a powder by means of a refrigerating fluid
FR2567042A1 (en) * 1984-07-04 1986-01-10 Kohlensaeurewerk Deutschland Process for crushing (milling, pulverising) cell-containing material via explosion
WO2018218148A1 (en) * 2017-05-26 2018-11-29 Headspace International, Llc Cryogenic separation of plant material

Also Published As

Publication number Publication date
ES491161A0 (en) 1980-12-01
IT8021519A0 (en) 1980-04-21
ZA802096B (en) 1981-04-29
AU5740380A (en) 1980-11-20
BE883344A (en) 1980-11-17
ES8100907A1 (en) 1980-12-01
IT1140880B (en) 1986-10-10
DE3018777A1 (en) 1980-11-27

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Legal Events

Date Code Title Description
ST Notification of lapse