EP0849366A1 - Procédé pour la désulfuration de fonte - Google Patents

Procédé pour la désulfuration de fonte Download PDF

Info

Publication number
EP0849366A1
EP0849366A1 EP97250365A EP97250365A EP0849366A1 EP 0849366 A1 EP0849366 A1 EP 0849366A1 EP 97250365 A EP97250365 A EP 97250365A EP 97250365 A EP97250365 A EP 97250365A EP 0849366 A1 EP0849366 A1 EP 0849366A1
Authority
EP
European Patent Office
Prior art keywords
slag
pig iron
desulfurization
magnesium
calcium carbide
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.)
Ceased
Application number
EP97250365A
Other languages
German (de)
English (en)
Inventor
Heinz-Peter Dr.-Ing. Kaiser
Klaus-Jürgen Dr.-Ing. Richter
Niclas Dr. mont. Müller
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.)
Vodafone GmbH
Original Assignee
Mannesmann 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 Mannesmann AG filed Critical Mannesmann AG
Publication of EP0849366A1 publication Critical patent/EP0849366A1/fr
Ceased 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
    • C21C1/025—Agents used for dephosphorising or desulfurising

Definitions

  • the invention relates to a method for desulfurization for further processing Steel in pig iron converters determines pig iron melts according to the Preamble of claim 1.
  • a generic method is known from DE 38 36 549 C1. With this The process is called desulfurization slag in the oxygen blowing process accruing converter slag added.
  • the converter slag is optionally in liquid form directly from the converter to the pig iron certain treatment pan filled and then the pig iron on the Poured slag.
  • the low sulfide capacity is that used Converter slag so that the proportion of additional expensive desulfurization reagents is still very high.
  • the object of the invention is to provide a process for the desulfurization of pig iron to indicate, in which the proportion of the usual expensive desulfurization reagents such as Calcium carbide and magnesium significantly reduced and the amount of amount of slag to be disposed of and disposed of is reduced.
  • This slag has a basicity of at least 4 and low iron content in the range of 4 - 6 percent by weight and phosphorus content ⁇ 0.4 percent by weight. Since the ladle slag usually has another has an average relative humidity of 8%, this z. B. one Grind drying to avoid caking in the diving lance.
  • the secondary metallurgical slag prepared in this way is suitable, optionally via a Immersion lance directly in the pig iron treatment or blast furnace pan or in the Cast iron gutter to be introduced.

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)
EP97250365A 1996-12-18 1997-12-04 Procédé pour la désulfuration de fonte Ceased EP0849366A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19654501 1996-12-18
DE19654501A DE19654501C1 (de) 1996-12-18 1996-12-18 Verfahren zur Roheisenentschwefelung

Publications (1)

Publication Number Publication Date
EP0849366A1 true EP0849366A1 (fr) 1998-06-24

Family

ID=7816309

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97250365A Ceased EP0849366A1 (fr) 1996-12-18 1997-12-04 Procédé pour la désulfuration de fonte

Country Status (3)

Country Link
US (1) US6015448A (fr)
EP (1) EP0849366A1 (fr)
DE (1) DE19654501C1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000047781A1 (fr) * 1999-02-12 2000-08-17 Pechiney Electrometallurgie Melange desulfurant a base de carbure de calcium et/ou de chaux
CN1064714C (zh) * 1998-12-08 2001-04-18 承德钢铁集团有限公司 用转炉钢包渣作调渣剂改造低Si铁水或半钢炼钢渣系的方法

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19910398C2 (de) * 1999-03-03 2001-02-22 Mannesmann Ag Verfahren zur Erzeugung von Stahl mit niedrigem Schwefelgehalt
AU2001285629A1 (en) 2000-08-11 2002-02-25 Dofasco Inc. Desulphurization reagent control method and system
US7377955B1 (en) * 2000-11-13 2008-05-27 Daniel Jonathan Shaw Method and apparatus for treatment of metallurgical slag and the like

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54121216A (en) * 1978-03-14 1979-09-20 Sumitomo Metal Ind Ltd Desulfurization of molten iron
JPS59136410A (ja) * 1983-01-21 1984-08-06 Nippon Jiryoku Senko Kk 加炭剤の製造方法
JPS62103310A (ja) * 1985-07-13 1987-05-13 Kawasaki Steel Corp 精錬滓の改質処理方法
DE3836549C1 (en) * 1988-10-27 1990-01-18 Krupp Stahl Ag, 4630 Bochum, De Process for desulphurising molten crude iron
DE8816829U1 (de) * 1988-09-20 1990-12-20 Skw Trostberg Ag, 8223 Trostberg Mittel zur Entschwefelung von Eisenschmelzen

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2906617A (en) * 1955-05-14 1959-09-29 Siderurgie Fse Inst Rech Method for a thorough desulfurizing of molten metal and in particular of liquid pig iron
JPS54150389A (en) * 1978-05-18 1979-11-26 Nippon Steel Corp Recovering method for fe and mn in converter slag
FR2456779A1 (fr) * 1979-05-15 1980-12-12 Sofrem Produit pour la desulfuration des fontes et aciers

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54121216A (en) * 1978-03-14 1979-09-20 Sumitomo Metal Ind Ltd Desulfurization of molten iron
JPS59136410A (ja) * 1983-01-21 1984-08-06 Nippon Jiryoku Senko Kk 加炭剤の製造方法
JPS62103310A (ja) * 1985-07-13 1987-05-13 Kawasaki Steel Corp 精錬滓の改質処理方法
DE8816829U1 (de) * 1988-09-20 1990-12-20 Skw Trostberg Ag, 8223 Trostberg Mittel zur Entschwefelung von Eisenschmelzen
DE3836549C1 (en) * 1988-10-27 1990-01-18 Krupp Stahl Ag, 4630 Bochum, De Process for desulphurising molten crude iron

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 003, no. 142 (C - 065) 24 November 1979 (1979-11-24) *
PATENT ABSTRACTS OF JAPAN vol. 008, no. 260 (C - 254) 29 November 1984 (1984-11-29) *
PATENT ABSTRACTS OF JAPAN vol. 011, no. 317 (C - 452) 15 October 1987 (1987-10-15) *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1064714C (zh) * 1998-12-08 2001-04-18 承德钢铁集团有限公司 用转炉钢包渣作调渣剂改造低Si铁水或半钢炼钢渣系的方法
WO2000047781A1 (fr) * 1999-02-12 2000-08-17 Pechiney Electrometallurgie Melange desulfurant a base de carbure de calcium et/ou de chaux
FR2789697A1 (fr) * 1999-02-12 2000-08-18 Pechiney Electrometallurgie Melange desulfurant a base de carbure de calcium et/ou de chaux

Also Published As

Publication number Publication date
DE19654501C1 (de) 1998-08-20
US6015448A (en) 2000-01-18

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