DE59900106D1 - RH vacuum process with mass circulation rate control to reduce the carbon content of a steel melt - Google Patents

RH vacuum process with mass circulation rate control to reduce the carbon content of a steel melt

Info

Publication number
DE59900106D1
DE59900106D1 DE59900106T DE59900106T DE59900106D1 DE 59900106 D1 DE59900106 D1 DE 59900106D1 DE 59900106 T DE59900106 T DE 59900106T DE 59900106 T DE59900106 T DE 59900106T DE 59900106 D1 DE59900106 D1 DE 59900106D1
Authority
DE
Germany
Prior art keywords
carbon content
melt
determining
reduce
rate control
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 - Fee Related
Application number
DE59900106T
Other languages
German (de)
Inventor
Manfred Zeimes
Franz Dr-Ing Muenscher
Ingo Knopp
Ralf Piechert
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.)
ThyssenKrupp Steel Europe AG
Original Assignee
ThyssenKrupp 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 ThyssenKrupp Stahl AG filed Critical ThyssenKrupp Stahl AG
Application granted granted Critical
Publication of DE59900106D1 publication Critical patent/DE59900106D1/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • C21C7/10—Handling in a vacuum

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Treatment Of Steel In Its Molten State (AREA)

Abstract

RH vacuum decarburization process for molten steel uses a decarburization kinetics computer model to determine the carbon content reduction for comparison with a threshold carbon content value. RH vacuum decarburization process for molten steel comprises: (a) determining the differential force for melt circulation from the melt differential pressure in riser and fall pipes resulting from injected transport gas (VFG) and produced reaction gas (VCO) in the riser pipe (5); (b) determining the circulating melt mass flow (MSt) from the differential force; (c) determining the reduction in oxygen and carbon contents in the melt using a computer model for decarburization kinetics; (d) repeating steps (a) to (c) if the determined carbon content is greater than a threshold value (Ce); and (e) ending the treatment if the determined carbon content is not greater than the threshold value.
DE59900106T 1998-04-06 1999-03-23 RH vacuum process with mass circulation rate control to reduce the carbon content of a steel melt Expired - Fee Related DE59900106D1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19815298A DE19815298C2 (en) 1998-04-06 1998-04-06 Process for reducing the carbon content of a molten steel

Publications (1)

Publication Number Publication Date
DE59900106D1 true DE59900106D1 (en) 2001-07-05

Family

ID=7863705

Family Applications (2)

Application Number Title Priority Date Filing Date
DE19815298A Expired - Fee Related DE19815298C2 (en) 1998-04-06 1998-04-06 Process for reducing the carbon content of a molten steel
DE59900106T Expired - Fee Related DE59900106D1 (en) 1998-04-06 1999-03-23 RH vacuum process with mass circulation rate control to reduce the carbon content of a steel melt

Family Applications Before (1)

Application Number Title Priority Date Filing Date
DE19815298A Expired - Fee Related DE19815298C2 (en) 1998-04-06 1998-04-06 Process for reducing the carbon content of a molten steel

Country Status (3)

Country Link
EP (1) EP0949339B1 (en)
AT (1) ATE201717T1 (en)
DE (2) DE19815298C2 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2469101C1 (en) * 2011-07-26 2012-12-10 Общество С Ограниченной Ответственностью "Группа "Магнезит" Repair method of vacuumiser branch pipe lining
RU2557046C2 (en) * 2013-09-23 2015-07-20 Корвинтек Юэроп Лимитед Submerged branch pipe for vacuumiser
CN106191381B (en) * 2016-08-31 2018-02-16 山东钢铁股份有限公司 A kind of method of the FeO in RH station fast eliminating clinkers
RU2736127C1 (en) * 2019-12-10 2020-11-11 Акционерное общество «ЕВРАЗ Нижнетагильский металлургический комбинат» (АО «ЕВРАЗ НТМК») Submersible pipe for circulation vacuum generator
CN117230281B (en) * 2023-11-14 2024-01-23 山西同航特钢有限公司 Production process of high-phosphorus IF steel

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1569158A (en) * 1976-11-30 1980-06-11 Nippon Steel Corp Methods of and apparatus for vacuum refining molten steel
JPS55141515A (en) * 1979-04-18 1980-11-05 Kawasaki Steel Corp Vacuum degassing method of molten steel
JPS5811721A (en) * 1981-07-16 1983-01-22 Kawasaki Steel Corp Vacuum refining method for molten steel
SU1557175A1 (en) * 1988-07-26 1990-04-15 Предприятие П/Я А-3681 Method of controlling the degassing of liquid steel in jet
JPH03134114A (en) * 1989-10-17 1991-06-07 Sumitomo Metal Ind Ltd Method for estimating carbon concentration in molten steel in rh refining
JPH05311226A (en) * 1992-05-07 1993-11-22 Nippon Steel Corp Reduced pressure-vacuum degassing refining method for molten metal

Also Published As

Publication number Publication date
DE19815298A1 (en) 1999-10-07
DE19815298C2 (en) 2000-05-31
EP0949339A1 (en) 1999-10-13
ATE201717T1 (en) 2001-06-15
EP0949339B1 (en) 2001-05-30

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Legal Events

Date Code Title Description
8327 Change in the person/name/address of the patent owner

Owner name: THYSSENKRUPP STAHL AG, 47166 DUISBURG, DE

8327 Change in the person/name/address of the patent owner

Owner name: THYSSENKRUPP STEEL AG, 47166 DUISBURG, DE

8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee