EP0166019B1 - Procédé de désulfuration de la fonte - Google Patents

Procédé de désulfuration de la fonte Download PDF

Info

Publication number
EP0166019B1
EP0166019B1 EP84107487A EP84107487A EP0166019B1 EP 0166019 B1 EP0166019 B1 EP 0166019B1 EP 84107487 A EP84107487 A EP 84107487A EP 84107487 A EP84107487 A EP 84107487A EP 0166019 B1 EP0166019 B1 EP 0166019B1
Authority
EP
European Patent Office
Prior art keywords
pig iron
blown
lime
gas
process according
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
EP84107487A
Other languages
German (de)
English (en)
Other versions
EP0166019A1 (fr
Inventor
Rudolf Dr.-Ing. Hammer
Walter Dipl.-Ing. Meichsner
Karl-Heinz Dr.-Ing. Peters
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.)
Thyssen Stahl AG
Original Assignee
Thyssen Stahl 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
Application filed by Thyssen Stahl AG filed Critical Thyssen Stahl AG
Priority to AT84107487T priority Critical patent/ATE37902T1/de
Priority to DE8484107487T priority patent/DE3474568D1/de
Priority to EP84107487A priority patent/EP0166019B1/fr
Priority to US06/743,854 priority patent/US4586955A/en
Priority to AU44244/85A priority patent/AU570805B2/en
Priority to CA000485473A priority patent/CA1239022A/fr
Priority to CN85104955.9A priority patent/CN1003308B/zh
Publication of EP0166019A1 publication Critical patent/EP0166019A1/fr
Application granted granted Critical
Publication of EP0166019B1 publication Critical patent/EP0166019B1/fr
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C1/00—Refining of pig-iron; Cast iron
    • C21C1/02—Dephosphorising or desulfurising

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
  • Treatment Of Steel In Its Molten State (AREA)

Claims (8)

1. Procédé de désulfuration de fontes brutes dans une poche de coulée, en particulier dans une poche tonneau, dans leguel on injecte d'abord dans la fonte brute 0,2 - 0,7 kg d'aluminium par tonne de fonte brute sous forme de grains fins avec un gaz inerte, en 1 - 4 minutes, et on injecte ensuite dans la masse fondue de fonte brute un agent de désulfuration constitué d'un mélange de chaux (C a 0) et d'une matière solide séparant un gaz, avec 2 - 20 NI de gaz support/kg d'agent de désulfuration.
2. Procédé selon la revendication 1, caractérisé . par le fait qu'on ajoute, en tant que la matière solide séparant un gaz, un carbonate alcalinoterreux et/ou un hydrate alcalino - terreux.
3. Procédé selon la revendication 2, caractérisé par le fait qu'on injecte, en tant que carbonate alcalino - terreux, de la pierre à chaux ou de la dolomite ou, en tant qu'hydrate alcalino - terreux, de la chaux hydratée.
4. Procédé selon l'une des revendications 1 à 3, caractérisé par le fait qu'on injecte dans la fonte brute un agent de désulfuration constitué de 40 - 70 % en poids de chaux et de 30 - 60 % en poids de matière solide séparant un gaz.
5. Procédé selon l'une des revendications 1 à 4, caractérisé par le fait qu'on ajoute à l'agent de désulfuration injecté une portion de carbone ou de substances contenant du Carbone telles que noir de carbone, anthracite, graphite, coke de pétrole, dans une fourchette de 1 - 10 % en poids.
6. Procédé selon l'une des revendications 1 à 5, caractérisé par le fait qu'on ajoute à l'agent de désulfuration injecté 1 - 10 % en poids de fluorine
7. Procédé selon l'une des revendications 1 à 6, caractérisé par le fait que la quantité de gaz support est de 3 - 8 NI de gaz support/ kg d'agent de désulfuration.
8. Procédé selon l'une des revendications 1 à 7, caractérisé par le fait qu'on injecte l'agent de désulfuration avec de l'air comprimé dans la masse fondue de fonte brute.
EP84107487A 1984-06-28 1984-06-28 Procédé de désulfuration de la fonte Expired EP0166019B1 (fr)

Priority Applications (7)

Application Number Priority Date Filing Date Title
AT84107487T ATE37902T1 (de) 1984-06-28 1984-06-28 Verfahren zur entschwefelung von roheisen.
DE8484107487T DE3474568D1 (en) 1984-06-28 1984-06-28 Method for desulfurizing pig iron
EP84107487A EP0166019B1 (fr) 1984-06-28 1984-06-28 Procédé de désulfuration de la fonte
US06/743,854 US4586955A (en) 1984-06-28 1985-06-12 Process for desulphurizing hot metal
AU44244/85A AU570805B2 (en) 1984-06-28 1985-06-27 Desulphurisation of molten iron
CA000485473A CA1239022A (fr) 1984-06-28 1985-06-27 Desulfuration des metaux en fusion
CN85104955.9A CN1003308B (zh) 1984-06-28 1985-06-28 金属液脱硫工艺

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP84107487A EP0166019B1 (fr) 1984-06-28 1984-06-28 Procédé de désulfuration de la fonte

Publications (2)

Publication Number Publication Date
EP0166019A1 EP0166019A1 (fr) 1986-01-02
EP0166019B1 true EP0166019B1 (fr) 1988-10-12

Family

ID=8192020

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84107487A Expired EP0166019B1 (fr) 1984-06-28 1984-06-28 Procédé de désulfuration de la fonte

Country Status (7)

Country Link
US (1) US4586955A (fr)
EP (1) EP0166019B1 (fr)
CN (1) CN1003308B (fr)
AT (1) ATE37902T1 (fr)
AU (1) AU570805B2 (fr)
CA (1) CA1239022A (fr)
DE (1) DE3474568D1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2780070B1 (fr) * 1998-06-22 2001-06-08 Elf Antar France Procede de moussage d'un laitier recouvrant un bain d'acier en fusion
US9365907B1 (en) 2013-03-14 2016-06-14 ALMAMET USA, Inc. Conversion of troublesome lime fines to useful high quality fluidized lime in feeding flux lime to a BOF converter
RU2562848C1 (ru) * 2014-07-11 2015-09-10 Федеральное государственное бюджетное учреждение науки Институт металлургии Уральского отделения Российской академии наук (ИМЕТ УрО РАН) Способ раскисления стали в ковше

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2531047B2 (de) * 1975-07-11 1978-07-06 Kloeckner-Werke Ag, 4100 Duisburg Verfahren zum Entschwefeln von Roheisen
US3998625A (en) * 1975-11-12 1976-12-21 Jones & Laughlin Steel Corporation Desulfurization method
US4126453A (en) * 1976-05-17 1978-11-21 Esm, Inc. Composition for a fluidizing flux in the production of iron and steel
US4137072A (en) * 1976-12-01 1979-01-30 Toyo Soda Manufacturing Co., Ltd. Additive for use in refining iron
JPS55110712A (en) * 1979-02-15 1980-08-26 Kawasaki Steel Corp Desulfurizing agent for blowing-in
JPS55110711A (en) * 1979-02-16 1980-08-26 Nippon Steel Corp Desulfurization of molten pig iron
DE3015024C2 (de) * 1980-04-18 1982-12-23 Skw Trostberg Ag, 8223 Trostberg Entschwefelungsmittel für Roheisen
JPS5953611A (ja) * 1982-09-22 1984-03-28 Kawasaki Steel Corp 溶銑脱硫法
US4462823A (en) * 1982-12-11 1984-07-31 Foseco International Limited Treatment agents for molten steel

Also Published As

Publication number Publication date
CN1003308B (zh) 1989-02-15
EP0166019A1 (fr) 1986-01-02
AU570805B2 (en) 1988-03-24
CN85104955A (zh) 1987-01-07
US4586955A (en) 1986-05-06
AU4424485A (en) 1986-01-02
ATE37902T1 (de) 1988-10-15
DE3474568D1 (en) 1988-11-17
CA1239022A (fr) 1988-07-12

Similar Documents

Publication Publication Date Title
EP0164592B2 (fr) Agent de désulfuration à grain fin pour des bains de fonte brute et procédé de désulfuration
DE1758250B1 (de) Mittel zum Entschwefeln von Eisenschmelzen
DE2455847A1 (de) Entschwefelung von stahl
US4263043A (en) Desulfurizing agent for injection
EP0602540B1 (fr) Agent pour la désulfuration, déphosphoration, désiliciation et dénitration de bains de fonte, de fonte de moulage, de ferro-chrome et de ferro-manganèse ainsi qu'un procédé
DE2455802C2 (de) Zuschlag zur Entschwefelung von Eisen
EP0530552B1 (fr) Procédé pour le traitement de désulfuration de foute en fusion
DE2708522A1 (de) Behandeln von eisenschmelzen mit erdalkalihaltigen, karbidischen und metallischen mitteln durch einblasen mit einem traegergas
DD202182A5 (de) Entschwefelungsgemisch und verfahren zu seiner herstellung
EP0220522B1 (fr) Mélange désulfurant pour bains métalliques, son procédé de fabrication et son utilisation
EP0166019B1 (fr) Procédé de désulfuration de la fonte
EP0038417B1 (fr) Agent de désulfuration
EP0175924B1 (fr) Procédé pour l'affinage de la fonte
DE3120138C3 (de) Pulverförmiges Entschwefelungsmittel
DE4226833A1 (de) Entschwefelungsmittel für Roheisen und Gußeisen
DE2709062A1 (de) Mittel und verfahren zur entschwefelung von eisenschmelzen
DE2403902C2 (de) Verfahren zur Herstellung kohlenstoffarmer Chromstähle und Ferrochromlegierungen
EP0011779A1 (fr) Procédé pour prolonger la tenue des garnissages basiques de convertisseurs lors de l'affinage de la fonte en acier
EP0387580A1 (fr) Agent et procédé de désulfuration de métaux en fusion
DE1583268B1 (de) Mittel zur Entschwefelung von fluessigem Eisen auf der Basis von technischem Kalkstickstoff und Verfahren zur Entschwefelung von Eisen
EP0974674B1 (fr) Méthode pour la désulfuration de la fonte liquide
EP0974673B1 (fr) Méthode pour la désulfuration de la fonte liquide
DE2708403C2 (de) Feinkörnige Entschwefelungsgemische für Eisenschmelzen auf Basis von Erdalkalikarbonaten, sowie Verfahren zur Entschwefelung von Eisenschmelzen unter Verwendung dieser Entschwefelungsgemische
DE3644518A1 (de) Verwendung von magnesit und verfahren zur durchfuehrung einer solchen verwendung
AT337231B (de) Verfahren zur herstellung von stahlen hoher reinheit im elektrischen lichtbogenofen

Legal Events

Date Code Title Description
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

AK Designated contracting states

Designated state(s): AT BE DE FR GB IT LU NL SE

17P Request for examination filed

Effective date: 19860207

17Q First examination report despatched

Effective date: 19870115

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE DE FR GB IT LU NL SE

REF Corresponds to:

Ref document number: 37902

Country of ref document: AT

Date of ref document: 19881015

Kind code of ref document: T

ITF It: translation for a ep patent filed

Owner name: BARZANO' E ZANARDO ROMA S.P.A.

REF Corresponds to:

Ref document number: 3474568

Country of ref document: DE

Date of ref document: 19881117

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19910524

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19910528

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 19910603

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19910605

Year of fee payment: 8

Ref country code: LU

Payment date: 19910605

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 19910628

Year of fee payment: 8

ITTA It: last paid annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19910630

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19910801

Year of fee payment: 8

EPTA Lu: last paid annual fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19920628

Ref country code: GB

Effective date: 19920628

Ref country code: AT

Effective date: 19920628

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19920629

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Effective date: 19920630

BERE Be: lapsed

Owner name: THYSSEN STAHL A.G.

Effective date: 19920630

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19930101

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee
GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19920628

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19930226

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19930302

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

EUG Se: european patent has lapsed

Ref document number: 84107487.5

Effective date: 19930109