EP1498499A1 - Agent de désulfuration de fontes metaux - Google Patents

Agent de désulfuration de fontes metaux Download PDF

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Publication number
EP1498499A1
EP1498499A1 EP04450140A EP04450140A EP1498499A1 EP 1498499 A1 EP1498499 A1 EP 1498499A1 EP 04450140 A EP04450140 A EP 04450140A EP 04450140 A EP04450140 A EP 04450140A EP 1498499 A1 EP1498499 A1 EP 1498499A1
Authority
EP
European Patent Office
Prior art keywords
magnesium
agent
alkali
pig iron
desulfurization
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.)
Granted
Application number
EP04450140A
Other languages
German (de)
English (en)
Other versions
EP1498499B1 (fr
Inventor
Johann Dipl.-Htl.-Ing. Zimmermann
Michael Dipl.-Ing. Dr. Groschner
Rainer Dipl.-Ing. Dr. Wiesböck
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.)
Donau Chemie AG
Original Assignee
Donau Chemie 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 Donau Chemie AG filed Critical Donau Chemie AG
Priority to AT04450140T priority Critical patent/ATE339526T1/de
Publication of EP1498499A1 publication Critical patent/EP1498499A1/fr
Application granted granted Critical
Publication of EP1498499B1 publication Critical patent/EP1498499B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/04—Removing impurities by adding a treating agent
    • C21C7/064—Dephosphorising; Desulfurising
    • C21C7/0645—Agents used for dephosphorising or desulfurising
    • 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 means for the desulfurization of molten metals, in particular Crude iron melts, which means calcium carbide and / or calcium oxide and a contains carbonaceous compound.
  • Desulphurizer used in the molten pig iron be introduced.
  • the agent with pneumatic immersion lances into the melt injected with both mono-injection and multiple injection (co-injection) is applied.
  • EP 0 226 994 A1 discloses a fine-grained agent for desulfurizing molten iron known, which consists of a technical calcium carbide, dried coal with a content of at least 15% by weight of volatiles and optionally fine-grained Magnesium exists.
  • the agent described in EP 0 164 592 A1 again consists of a combination of calcium carbide, at least one hydrogen-releasing substance and magnesium.
  • US-A-4,159,906 describes a desulfurizing agent containing calcium carbide or Calcium cyanamide and an additive, which at the temperature of the molten Metal gives water or hydrogen.
  • an additive which at the temperature of the molten Metal gives water or hydrogen.
  • Desulphurization is sought with as little desulphurising agent as possible get along. It consists m.a.W. the effort to use as little desulphurising agent as possible to introduce the pig iron melt and yet to a high degree of desulfurization to reach.
  • This object is achieved with an agent containing calcium carbide and / or calcium oxide and a carbon-containing compound and additionally an alkali and / or a Contains alkaline earth metal phosphate.
  • Suitable alkali metal or alkaline earth metal phosphate are ortho- and metaphosphates, but also Fluorophosphate, in neutral salt form and also as acid salts. It has shown, but also naturally occurring phosphates with mineral-typical admixtures, such as. Apatite, fluorapatite or hydroxyapatite.
  • carbonaceous compound e.g. Coal, urea, hydrocarbons, Polyethylene, polyurethane or rubber, preferably in an amount between 0.5 to 15% by weight.
  • a preferred embodiment of the agent according to the invention contains the alkali and / or the alkaline earth metal phosphate in a total amount up to 10 wt .-%.
  • Particularly preferred is a content of 0.5 to 8 wt .-% of alkali and / or Alkaline earth.
  • the desulphurisation effect with the agent according to the invention is then particular pronounced when the alkali and / or alkaline earth metal phosphate in powder form with a Grain size of a maximum of 0.2 mm is present.
  • the inventive composition may further metallic magnesium and / or Magnesium alloys containing the proportion of magnesium and / or Magnesium alloys in particular between 2 and 35 wt .-% is.
  • the invention further relates to a process for the preparation of the agent according to the invention for the desulphurisation of pig iron melts, which process is characterized that a mixture containing calcium carbide and / or calcium oxide, a carbonaceous Compound and the alkali and / or Erdalkaliphospat is ground, whereupon optionally powdered magnesium or a powdered magnesium alloy, each with a grain size up to 1.0 mm, is mixed.
  • the invention relates to the use of the inventive agent for Desulfurization of molten metals, in particular pig iron melts.
  • the invention further relates to a process for the production of desulfurized Metals, in particular pig iron, and is characterized in that the desulfurizing metal is melted, whereupon the resulting molten metal with the Desulfurizing agent according to the invention is brought into contact.
  • the mixture was reduced to a particle size in the range of about 0.5 mm with 2% metallic Magnesium powder of the same particle size mixed.
  • the sulfur content was 40 ppm determines what gives a K value of 0.930.
  • the mixture was reduced to a particle size in the range of about 0.5 mm with 2% metallic Magnesium powder of the same particle size mixed.

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)
  • Manufacture And Refinement Of Metals (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Glass Compositions (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
EP04450140A 2003-07-14 2004-07-07 Agent de désulfuration de fontes metaux Expired - Lifetime EP1498499B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT04450140T ATE339526T1 (de) 2003-07-14 2004-07-07 Mittel zur entschwefelung von metallschmelzen

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT10802003 2003-07-14
AT0108003A AT412477B (de) 2003-07-14 2003-07-14 Mittel zur entschwefelung von metallschmelzen

Publications (2)

Publication Number Publication Date
EP1498499A1 true EP1498499A1 (fr) 2005-01-19
EP1498499B1 EP1498499B1 (fr) 2006-09-13

Family

ID=32831430

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04450140A Expired - Lifetime EP1498499B1 (fr) 2003-07-14 2004-07-07 Agent de désulfuration de fontes metaux

Country Status (3)

Country Link
EP (1) EP1498499B1 (fr)
AT (2) AT412477B (fr)
DE (1) DE502004001452D1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011116501C5 (de) 2011-10-20 2018-05-24 Almamet Gmbh Bitumen enthaltendes Entschwefelungsmittel

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0225560A1 (fr) * 1985-12-03 1987-06-16 Giovanni Crespi Fondant pour laitier basique utilisable dans des fours de fabrication d'aciers
EP0582970A1 (fr) * 1992-08-13 1994-02-16 Freissmuth, Alfred, Dr.-Ing. Produit pour désulfuration des fontes et des aciers liquides et procédé de désulfuration
EP0602540A1 (fr) * 1992-12-15 1994-06-22 Alfred Dr.-Ing. Freissmuth 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
WO1995033859A1 (fr) * 1994-06-08 1995-12-14 Donau Chemie Aktiengesellschaft Agent de desulfuration pour bains de fusion de fonte brute et de fonte affinee et son procede de fabrication
EP0745143A1 (fr) * 1994-12-09 1996-12-04 Donau Chemie Aktiengesellschaft Agent de traitement de fontes de premiere ou de deuxieme fusion de fer a des fins de desulfuration
EP0974673A1 (fr) * 1998-07-22 2000-01-26 Krupp Polysius Ag Méthode pour la désulfuration de la fonte liquide

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0225560A1 (fr) * 1985-12-03 1987-06-16 Giovanni Crespi Fondant pour laitier basique utilisable dans des fours de fabrication d'aciers
EP0582970A1 (fr) * 1992-08-13 1994-02-16 Freissmuth, Alfred, Dr.-Ing. Produit pour désulfuration des fontes et des aciers liquides et procédé de désulfuration
EP0602540A1 (fr) * 1992-12-15 1994-06-22 Alfred Dr.-Ing. Freissmuth 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
WO1995033859A1 (fr) * 1994-06-08 1995-12-14 Donau Chemie Aktiengesellschaft Agent de desulfuration pour bains de fusion de fonte brute et de fonte affinee et son procede de fabrication
EP0745143A1 (fr) * 1994-12-09 1996-12-04 Donau Chemie Aktiengesellschaft Agent de traitement de fontes de premiere ou de deuxieme fusion de fer a des fins de desulfuration
EP0974673A1 (fr) * 1998-07-22 2000-01-26 Krupp Polysius Ag Méthode pour la désulfuration de la fonte liquide

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
DELHEY H-M ET AL: "BEHANDLUNG DES ROHEISENS MIT KALK UND CALCIUMCARBID NACH DEM TAUCHLANZENVERFAHREN", STAHL UND EISEN, VERLAG STAHLEISEN GMBH. DUSSELDORF, DE, vol. 109, no. 24, 4 December 1989 (1989-12-04), pages 1207 - 1214, XP000103829, ISSN: 0340-4803 *
FREISSMUTH A: "ENTSCHWEFELUNG VON ROHEISEN MIT CALCIUMCARBID - DER HEUTIGE STAND UND MOEGLICHE ENTWICKLUNGEN", STAHL UND EISEN, VERLAG STAHLEISEN GMBH. DUSSELDORF, DE, vol. 117, no. 9, 15 September 1997 (1997-09-15), pages 53 - 59, XP000703430, ISSN: 0340-4803 *

Also Published As

Publication number Publication date
AT412477B (de) 2005-03-25
DE502004001452D1 (de) 2006-10-26
EP1498499B1 (fr) 2006-09-13
ATA10802003A (de) 2004-08-15
ATE339526T1 (de) 2006-10-15

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