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 recirculationInfo
- 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- Withdrawn
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.
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)
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)
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)
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 |
-
1979
- 1979-05-18 FR FR7912728A patent/FR2456556A1/en not_active Withdrawn
-
1980
- 1980-04-09 ZA ZA00802096A patent/ZA802096B/en unknown
- 1980-04-11 AU AU57403/80A patent/AU5740380A/en not_active Abandoned
- 1980-04-21 IT IT8021519A patent/IT1140880B/en active
- 1980-05-05 ES ES491161A patent/ES8100907A1/en not_active Expired
- 1980-05-16 DE DE19803018777 patent/DE3018777A1/en not_active Withdrawn
- 1980-05-16 BE BE0/200650A patent/BE883344A/en unknown
Patent Citations (2)
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)
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 |
---|---|
ZA802096B (en) | 1981-04-29 |
ES491161A0 (en) | 1980-12-01 |
BE883344A (en) | 1980-11-17 |
ES8100907A1 (en) | 1980-12-01 |
DE3018777A1 (en) | 1980-11-27 |
IT1140880B (en) | 1986-10-10 |
IT8021519A0 (en) | 1980-04-21 |
AU5740380A (en) | 1980-11-20 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |