EP0157708A2 - Entfettungsverfahren für kaltgewalztes Stahlband - Google Patents

Entfettungsverfahren für kaltgewalztes Stahlband Download PDF

Info

Publication number: EP0157708A2
Authority: EP; European Patent Office
Prior art keywords: degreasing; atmosphere; water vapor; injected; hydrogen
Prior art date: 1984-04-05
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

EP85400669A

Other languages

English (en)

French (fr)

Other versions

EP0157708B1 (de

EP0157708A3 (en

Inventor

Robert Wang

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.)

Fives Stein SA

Original Assignee

Stein Heurtey 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.)

1984-04-05

Filing date

1985-04-03

Publication date

1985-10-09

1984-04-05 Priority claimed from FR8405366A external-priority patent/FR2562563B1/fr

1984-09-28 Priority claimed from FR8414950A external-priority patent/FR2571064B2/fr

1985-04-03 Application filed by Stein Heurtey SA filed Critical Stein Heurtey SA

1985-04-03 Priority to AT85400669T priority Critical patent/ATE57396T1/de

1985-10-09 Publication of EP0157708A2 publication Critical patent/EP0157708A2/de

1987-05-20 Publication of EP0157708A3 publication Critical patent/EP0157708A3/fr

1990-10-10 Application granted granted Critical

1990-10-10 Publication of EP0157708B1 publication Critical patent/EP0157708B1/de

2005-04-03 Anticipated expiration legal-status Critical

Status Expired - Lifetime legal-status Critical Current

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Images

Classifications

- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G5/00—Cleaning or de-greasing metallic material by other methods; Apparatus for cleaning or de-greasing metallic material with organic solvents
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
- B21B45/0269—Cleaning
- B21B45/0275—Cleaning devices
- B21B45/0278—Cleaning devices removing liquids
- B21B45/0284—Cleaning devices removing liquids removing lubricants

Definitions

the present invention relates to a method for degreasing a cold-rolled metal strip, and more particularly a continuously treated strip, preferably a ferrous strip, or a copper strip.
the atmosphere used is constituted by a mixture of N 2 , H 2 , H 2 0, C0 2 and C0, and it results from a sub-stoichiometric combustion of a fossil fuel (gas or fuel) .
Total degreasing of the metal strip is therefore obtained by heating and cracking the oils, by chemical action of the gases in the atmosphere of the fumes from the combustion of this fossil fuel.
the atmosphere having the composition specified in the prior patent therefore comprises reducing gases (H and CO), and also oxidizing gases (H 2 0 and CO 2 ).
the present invention relates to a method of degreasing a cold-rolled metal strip by chemical effect of an atmosphere of determined composition, according to which the heating and degreasing actions are separated: the heating being carried out in an enclosure provided with means supply of heat by radiation, and the lubrication being obtained by the chemical effect of said atmosphere in the heating enclosure, this process being characterized in that said atmosphere consists of a mixture of nitrogen and hydrogen enriched in water vapor, injected into the degreasing section of said enclosure.
the hydrogen content of the mixture is between 2% and 30%, and the water vapor content is between 5 and 30% of a complete mixture N 2 -H 2 - H Z O, injected into the degreasing section.
the metal strip can be brought, by means of radiation heating, to a temperature: between 350 and 700 ° C., necessary for carrying out degreasing by chemical effect of the atmosphere.
the injected gas mixture can be preheated to a temperature of the order of 700 ° C, by any suitable means.
the water vapor from the atmosphere can be injected into a stream N 2 , H 2 (mixture of nitrogen and hydrogen) already preheated .
the atmosphere is produced by injecting air in an amount such that the combination of the oxygen contained in the air with the hydrogen present in said atmosphere gives the same final composition of atmosphere gas as if a mixture of nitrogen, hydrogen and water vapor was injected directly, as described above.
the injected air supplies the nitrogen of the final composition of the atmosphere, and the water vapor necessary for this final atmosphere results from the combustion of part of the hydrogen of l atmosphere in the presence of oxygen from the air.
the degreasing atmosphere is obtained by an injection of air, as specified above, combined with an injection of fumes from the combustion of a gaseous fuel, this combustion being able to be carried out either at the in interior, or outside the enclosure where degreasing takes place.
the combustion of the gaseous fuel is preferably a sub-stoichiometric combustion, whether premixed or not, with a rate of unburnt between 0.5 and 10%.
This variant brings a simplification of implementation compared to the process described above, while allowing the same oxidation potential with respect to the strip, since the final composition of the degreasing atmosphere remains the even.
an N 2 + H 2 mixture flow rate of 150 Nm 3 / h is injected in the vicinity of the metallization bath. This flow passes through the cooling and annealing sections, and reaches the degreasing section.
the atmosphere is produced by injecting oxidizing fumes in an amount such that the excess oxygen contained in the fumes combines with the hydrogen present in the atmosphere to produce water vapor which is added to the water vapor already present in the injected fumes.
the degreasing atmosphere thus produced contains hydrogen, water vapor, and a small amount of CO 2 introduced with the fumes.

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Chemical & Material Sciences (AREA)
Engineering & Computer Science (AREA)
Mechanical Engineering (AREA)
Chemical Kinetics & Catalysis (AREA)
General Chemical & Material Sciences (AREA)
Materials Engineering (AREA)
Metallurgy (AREA)
Organic Chemistry (AREA)
Heat Treatment Of Strip Materials And Filament Materials (AREA)
Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)

EP85400669A 1984-04-05 1985-04-03 Entfettungsverfahren für kaltgewalztes Stahlband Expired - Lifetime EP0157708B1 (de)

Priority Applications (1)

Application Number	Priority Date	Filing Date	Title
AT85400669T ATE57396T1 (de)	1984-04-05	1985-04-03	Entfettungsverfahren fuer kaltgewalztes stahlband.

Applications Claiming Priority (4)

Application Number	Priority Date	Filing Date	Title
FR8405366A FR2562563B1 (fr)	1984-04-05	1984-04-05	Procede de degraissage d'une bande metallique laminee a froid
FR8414950		1984-09-28
FR8414950A FR2571064B2 (fr)	1984-09-28	1984-09-28	Procede de degraissage d'une bande metallique laminee a froid
FR8405366		1985-04-05

Publications (3)

Publication Number	Publication Date
EP0157708A2 true EP0157708A2 (de)	1985-10-09
EP0157708A3 EP0157708A3 (en)	1987-05-20
EP0157708B1 EP0157708B1 (de)	1990-10-10

Family

ID=26223904

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP85400669A Expired - Lifetime EP0157708B1 (de)	1984-04-05	1985-04-03	Entfettungsverfahren für kaltgewalztes Stahlband

Country Status (3)

Country	Link
US (1)	US4840680A (de)
EP (1)	EP0157708B1 (de)
DE (1)	DE3580055D1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
EP0271135A1 (de) *	1986-11-20	1988-06-15	Philips Patentverwaltung GmbH	Verfahren zum Reinigen von Metallbauteilen für Kathodenstrahlröhren
GB2205484A (en) *	1987-06-05	1988-12-14	Samuel Strapping Systems Ltd	Cleaning unit
EP0371693A1 (de) *	1988-11-30	1990-06-06	Gec-Marconi Limited	Lötverfahren

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE69215565T2 (de) *	1991-03-26	1997-05-28	Philips Electronics Nv	Flüssigkristallbildwiedergabeanordnung mit Orientierungsschicht
GB2274286B (en) *	1993-01-13	1996-11-06	Singapore Asahi Chemical & Solder Ind Pte Ltd	Method of and apparatus for preparing an electric circuit board for a flow or wave soldering process
US5578147A (en) *	1995-05-12	1996-11-26	The Boc Group, Inc.	Controlled process for the heat treating of delubed material
DE19840778A1 (de) *	1998-09-07	2000-03-09	Messer Griesheim Gmbh	Verfahren und Vorrichtung zur Reinigung von Metalloberflächen
JP6367402B1 (ja) *	2017-02-28	2018-08-01	モリテックスチール株式会社	過熱水蒸気による油分除去システム及び過熱水蒸気発生装置

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US2189836A (en) *	1936-08-12	1940-02-13	Crown Cork & Seal Co	Method of strip annealing aluminum foil
US2506364A (en) *	1948-03-03	1950-05-02	Gen Electric	Heat-treating aluminum foil
US2625495A (en) *	1948-06-04	1953-01-13	Surface Combustion Corp	High-temperature cleaning of ferrous metal
US3061485A (en) *	1960-12-12	1962-10-30	Reynolds Metals Co	Residual lubricant removal from aluminum foil
FR1568732A (de) *	1966-05-16	1969-05-30
US3627289A (en) *	1970-06-22	1971-12-14	Walter Erman	Apparatus and method for removing oil from metal turnings
FR2415147A1 (fr) *	1978-01-19	1979-08-17	Valjim Corp	Traitement electrothermique a courant continu de toles continues en atmosphere protectrice
CA1152870A (en) *	1979-12-24	1983-08-30	Hiromitsu Naito	Process for continuously annealing of a cold rolled steel strip
FR2508064B1 (fr) *	1981-06-23	1987-07-10	Stein Heurtey	Procede de degraissage d'une bande laminee a froid
FR2562562B1 (fr) *	1984-04-04	1986-08-08	Stein Heurtey	Procede et dispositif de nettoyage en continu d'une bande metallique

1985
- 1985-04-03 EP EP85400669A patent/EP0157708B1/de not_active Expired - Lifetime
- 1985-04-03 DE DE8585400669T patent/DE3580055D1/de not_active Expired - Lifetime
1987
- 1987-05-08 US US07/048,468 patent/US4840680A/en not_active Expired - Lifetime

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
EP0271135A1 (de) *	1986-11-20	1988-06-15	Philips Patentverwaltung GmbH	Verfahren zum Reinigen von Metallbauteilen für Kathodenstrahlröhren
US4919157A (en) *	1986-11-20	1990-04-24	U.S. Philips Corporation	Method of cleaning metal components for cathode ray tubes
GB2205484A (en) *	1987-06-05	1988-12-14	Samuel Strapping Systems Ltd	Cleaning unit
EP0371693A1 (de) *	1988-11-30	1990-06-06	Gec-Marconi Limited	Lötverfahren

Also Published As

Publication number	Publication date
EP0157708B1 (de)	1990-10-10
DE3580055D1 (de)	1990-11-15
EP0157708A3 (en)	1987-05-20
US4840680A (en)	1989-06-20

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Date	Code	Title	Description
1985-08-10	PUAI	Public reference made under article 153(3) epc to a published international application that has entered the european phase	Free format text: ORIGINAL CODE: 0009012
1985-10-09	AK	Designated contracting states	Designated state(s): AT BE CH DE FR GB IT LI LU NL SE
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1987-11-25	17P	Request for examination filed	Effective date: 19870928
1988-02-03	18W	Application withdrawn	Withdrawal date: 19871130
1988-11-30	D18W	Application withdrawn (deleted)
1989-01-05	REG	Reference to a national code	Ref country code: DE Ref legal event code: 8580 Free format text: IN HEFT 10/88, SEITE 2409, SP. 3: DIE VEROEFFENTLICHUNG IST ZU STREICHEN
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2005-04-30	BE20	Be: patent expired	Owner name: STEIN HEURTEY Effective date*: 20050403
2007-12-31	BE20	Be: patent expired	Owner name: STEIN HEURTEY Effective date*: 20050403

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