WO2008002176A1 - Procédé de réduction d'acier dans la poche - Google Patents

Procédé de réduction d'acier dans la poche Download PDF

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Publication number
WO2008002176A1
WO2008002176A1 PCT/RU2006/000344 RU2006000344W WO2008002176A1 WO 2008002176 A1 WO2008002176 A1 WO 2008002176A1 RU 2006000344 W RU2006000344 W RU 2006000344W WO 2008002176 A1 WO2008002176 A1 WO 2008002176A1
Authority
WO
WIPO (PCT)
Prior art keywords
melt
ladle
stream
desoxidant
deoxidizer
Prior art date
Application number
PCT/RU2006/000344
Other languages
English (en)
Russian (ru)
Inventor
Evald Shumaher
Anatoliy Konstantinovich Belitchenko
Gennadiy Arkadevich Lozin
Igor Vitalevich Derevyanchenko
Viktor Nikolaevich Khloponin
Vladimir Konstantinovich Turovskiy
Edgar Shumaher
Aleksandr Nikolaevich Savyuk
Konstantin Filippovich Dorn
Vladimir Vladimirovich Yakovenko
Renata Frantski
Aleksandr Heshele
Original Assignee
Techcom Gmbh
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=38845840&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO2008002176(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority to CN2006800551775A priority Critical patent/CN101522922B/zh
Priority to DK06843948.8T priority patent/DK2039785T3/da
Priority to BRPI0621816-4A priority patent/BRPI0621816B1/pt
Priority to EP06843948A priority patent/EP2039785B1/fr
Priority to AT06843948T priority patent/ATE508210T1/de
Priority to SI200631073T priority patent/SI2039785T1/sl
Priority to DE06843948T priority patent/DE06843948T1/de
Application filed by Techcom Gmbh filed Critical Techcom Gmbh
Priority to PL06843948T priority patent/PL2039785T3/pl
Priority to PT06843948T priority patent/PT2039785E/pt
Priority to PCT/RU2006/000344 priority patent/WO2008002176A1/fr
Priority to DE602006021808T priority patent/DE602006021808D1/de
Priority to ES06843948T priority patent/ES2328895T3/es
Priority to EA200802345A priority patent/EA014276B1/ru
Publication of WO2008002176A1 publication Critical patent/WO2008002176A1/fr

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
    • C21C7/0075—Treating in a ladle furnace, e.g. up-/reheating of molten steel within the ladle
    • 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
    • C21C7/0068—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00 by introducing material into a current of streaming metal
    • 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
    • C21C7/06—Deoxidising, e.g. killing

Definitions

  • the invention relates to the field of ferrous metallurgy, in particular to technological methods for the production of high-quality low-carbon steel
  • An invariable and especially important process used in the production of high-quality steels is the process of deoxidation or removal of excess oxygen from a melt prepared for casting.
  • An increased or inadequate oxygen content in the hardened metal determines the continuation of the oxidation of residual carbon in it with the release of gaseous carbon monoxide, up to the end of crystallization of the ingot. At the same time, gas porosity is formed in the finished product, violating its quality indicators and density.
  • the most commonly used deoxidation method in steelmaking is the deposition method.
  • a feature of this method is the conversion of oxygen from a solution in the form of iron oxide into non-metallic compounds with elements that have a greater affinity for oxygen than iron and less than iron oxide and are soluble in metal. In this case, the resulting oxidation products are released from the metal into slag in the solid or liquid state.
  • the most common method of introducing aluminum is the method of introducing aluminum into the bucket in pieces or in ingots, or pieces commensurate with them.
  • the degree of absorption of the useful element of the deoxidizing agent by the melt is at an extremely low level (For example: for aluminum 5–20%) and is extremely unstable.
  • the input method itself requires significant manual labor.
  • methods of introducing deoxidizing agents into the ladle in crushed lumpy or granular form are used.
  • the closest in technical essence and the achieved result is a method of steel deoxidation in a ladle, including the introduction of a granular or lump deoxidizer having a density lower than the melt density in the ladle into the melt during its discharge from the technological unit into the ladle.
  • a granular or lump deoxidizer having a density lower than the melt density in the ladle into the melt during its discharge from the technological unit into the ladle.
  • the known method has the following disadvantages: the crushed deoxidizer introduced is fed to the melt mirror or the surface of the metal stream upon release, as a result of which most of it burns out due to atmospheric oxygen, without being able to dissolve in the metal, which leads to losses of the deoxidizer and reduces the quality of the metal.
  • the objective of the invention is to develop a deoxidation technology that improves the quality of the metal to reduce material loss.
  • the expected technical result is a decrease in the deoxidant fumes increase the stability of its absorption, increase
  • the technical result is achieved by the fact that in the known method of steel deoxidation in a ladle, including the introduction of a granular or lump deoxidizer having a density lower than the melt density in the ladle into the melt during its discharge from the technological unit into the ladle, according to the invention, the deoxidizer is introduced into the melt stream in a concentrated high-speed stream with an impulse providing penetration of the deoxidizer directly into the melt.
  • the deoxidizer is introduced into the jet of melt, drained into the ladle from the technological unit, using a shot blasting machine.
  • granular or lump aluminum is used with a granule or lump size of 0.5-12 mm., which can be injected with a stream of melt being drained into a ladle from a technological unit using a shot blasting machine.
  • the place of introduction of aluminum into the stream is set depending on its fractional composition, and the smaller the granule size, the closer the place of introduction of stream into the stream to the surface of the melt in the bucket to be filled.
  • the place of introduction of aluminum into the stream is set depending on its fractional composition, and the finer the size of the granules, the closer the place of introduction of stream into the stream to the surface of the melt in the bucket to be filled.
  • the granule is less than 0.5 mm in size, the granules melt at the moment of contact with a stream of metal, which leads to a significant oxidation of the deoxidizer with atmospheric oxygen.
  • the supply of a deoxidizer with a fraction of more than 12 mm leads to difficulties in the operation of the shot blasting unit for introducing a deoxidizer into the melt and also to additional deoxidant combustion in air.
  • the method is implemented when smelting steel grade 20 in an arc furnace.
  • the metal was deoxidized with manganese and silicon.
  • aluminum was introduced into the bucket in the form of a fraction of a fraction of 6 mm in portions of 100 kg using a shot blasting machine with a capacity of 400 kg / min. Air pressure in the highway 5 atm.
  • the transportation route was made of a metal pipe, which provided a flow of aluminum into the melt stream at a distance of about 1.5-2.0 m from it.
  • the melt was discharged from the furnace with a temperature of 1545 0 C.
  • Aluminum was introduced based on the calculation of its introduction up to 1.5 kg per ton of steel with a pulse of 200 H.
  • the oxygen content was 0.007-0.008%, with a residual aluminum content of 0.017%.
  • the application of the proposed invention allows to reduce the amount of deoxidizing agent by 2 times, increase its absorption and significantly improve the quality of the metal.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Multimedia (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Medicines Containing Material From Animals Or Micro-Organisms (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
  • Anti-Oxidant Or Stabilizer Compositions (AREA)

Abstract

L'invention appartient au domaine de la fabrication d'acier à carbone bas de haute qualité. La réduction d'acier dans la poche comprend l'injection dans la masse fondue d'un réducteur en granules ou en morceaux, qui a une densité inférieure à celle de la masse fondue dans la poche. Le réducteur est injecté pendant l'évacuation de la masse fondue depuis la machine de production dans la poche via un courant concentré de haute vitesse dont l'impulsion assure la pénétration du réducteur directement à l'intérieur de la masse fondue. Le réducteur est injecté dans le courant de masse fondue au moyen d'une installation de sablage. On utilise en tantque réducteur de l'aluminium en granules ou en morceaux ayant une taille de 0,5 à 12,0 mm. L'utilisation de l'invention permet de réduire de moitié la combustion du réducteur, d'augmenter son assimilation et d'améliorer la qualité du métal.
PCT/RU2006/000344 2006-06-30 2006-06-30 Procédé de réduction d'acier dans la poche WO2008002176A1 (fr)

Priority Applications (13)

Application Number Priority Date Filing Date Title
EA200802345A EA014276B1 (ru) 2006-06-30 2006-06-30 Способ раскисления стали в ковше
DE06843948T DE06843948T1 (de) 2006-06-30 2006-06-30 Pfannenstahldesoxidationsverfahren
BRPI0621816-4A BRPI0621816B1 (pt) 2006-06-30 2006-06-30 Método de desoxidação de aço na panela
EP06843948A EP2039785B1 (fr) 2006-06-30 2006-06-30 Procédé de réduction d'acier dans la poche
AT06843948T ATE508210T1 (de) 2006-06-30 2006-06-30 Pfannenstahldesoxidationsverfahren
SI200631073T SI2039785T1 (sl) 2006-06-30 2006-06-30 Postopek deoksidacije jekla v loncu
PL06843948T PL2039785T3 (pl) 2006-06-30 2006-06-30 Sposób odtleniania stali w kadzi
CN2006800551775A CN101522922B (zh) 2006-06-30 2006-06-30 钢包中钢的脱氧方法
DK06843948.8T DK2039785T3 (da) 2006-06-30 2006-06-30 Fremgangsmåde til stållommedeoxidering
PT06843948T PT2039785E (pt) 2006-06-30 2006-06-30 Método de desoxidação de aço em colher de fundição
PCT/RU2006/000344 WO2008002176A1 (fr) 2006-06-30 2006-06-30 Procédé de réduction d'acier dans la poche
DE602006021808T DE602006021808D1 (de) 2006-06-30 2006-06-30 Pfannenstahldesoxidationsverfahren
ES06843948T ES2328895T3 (es) 2006-06-30 2006-06-30 Procedimiento de desoxidación de acero en cuchara de colada.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/RU2006/000344 WO2008002176A1 (fr) 2006-06-30 2006-06-30 Procédé de réduction d'acier dans la poche

Publications (1)

Publication Number Publication Date
WO2008002176A1 true WO2008002176A1 (fr) 2008-01-03

Family

ID=38845840

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/RU2006/000344 WO2008002176A1 (fr) 2006-06-30 2006-06-30 Procédé de réduction d'acier dans la poche

Country Status (12)

Country Link
EP (1) EP2039785B1 (fr)
CN (1) CN101522922B (fr)
AT (1) ATE508210T1 (fr)
BR (1) BRPI0621816B1 (fr)
DE (2) DE06843948T1 (fr)
DK (1) DK2039785T3 (fr)
EA (1) EA014276B1 (fr)
ES (1) ES2328895T3 (fr)
PL (1) PL2039785T3 (fr)
PT (1) PT2039785E (fr)
SI (1) SI2039785T1 (fr)
WO (1) WO2008002176A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102031335A (zh) * 2010-11-01 2011-04-27 武汉科技大学 冶炼大线能量焊接高强度钢的复合脱氧剂及使用方法
CN102146518A (zh) * 2011-04-02 2011-08-10 钢铁研究总院 一种气氛保护电渣重熔用精炼剂
DE102015113241A1 (de) 2015-08-11 2017-02-16 Rhm Rohstoff-Handelsgesellschaft Mbh Verfahren zum Einbringen von Zuschlagstoffen in Metallschmelzen

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1153117A (en) * 1967-02-24 1969-05-21 Brown Fintube Co Apparatus and process for Introducing Addition Agent into Molten Steel
SU827560A1 (ru) * 1978-08-25 1981-05-07 Центральный Ордена Трудового Красногознамени Научно-Исследовательскийинститут Черной Металлургии Им.И.П.Бардина Способ получени стали
WO1998041658A1 (fr) * 1997-03-17 1998-09-24 Stein - Industrie-Anlagen Inh. Christel Stein Procede d'apport de matieres solides granuleuses dans des masses metalliques fondues

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4391319A (en) * 1979-08-27 1983-07-05 Keystone Consolidated Industries, Inc. Apparatus for introducing elements into molten metal streams and casting in inert atmosphere
US4389249A (en) * 1982-04-22 1983-06-21 Inland Steel Company Method for adding ingredient to steel as shot
US4863684A (en) * 1989-01-13 1989-09-05 Inland Steel Company Method and apparatus for adding shot to molten steel
CN1030532C (zh) * 1994-01-08 1995-12-20 中国冶金技术公司 使用铝渣进行的钢铁冶炼方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1153117A (en) * 1967-02-24 1969-05-21 Brown Fintube Co Apparatus and process for Introducing Addition Agent into Molten Steel
SU827560A1 (ru) * 1978-08-25 1981-05-07 Центральный Ордена Трудового Красногознамени Научно-Исследовательскийинститут Черной Металлургии Им.И.П.Бардина Способ получени стали
WO1998041658A1 (fr) * 1997-03-17 1998-09-24 Stein - Industrie-Anlagen Inh. Christel Stein Procede d'apport de matieres solides granuleuses dans des masses metalliques fondues

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
YU.F. VYATKIN; V.A. VIKHREVCHUK; V.F. POLYAKOV ET AL.: "A resource-saving technology of deoxidizing steel with aluminum in a ladle", CHERMETINFORMATSYA JOURNAL, 1990, pages 53 - 55

Also Published As

Publication number Publication date
PL2039785T3 (pl) 2011-10-31
ES2328895T1 (es) 2009-11-19
PT2039785E (pt) 2011-08-17
DE602006021808D1 (de) 2011-06-16
BRPI0621816A2 (pt) 2012-09-18
EP2039785A4 (fr) 2009-10-21
ES2328895T3 (es) 2011-10-18
EA200802345A1 (ru) 2009-04-28
DK2039785T3 (da) 2011-08-15
CN101522922A (zh) 2009-09-02
EA014276B1 (ru) 2010-10-29
DE06843948T1 (de) 2009-12-17
EP2039785B1 (fr) 2011-05-04
ATE508210T1 (de) 2011-05-15
CN101522922B (zh) 2012-08-01
SI2039785T1 (sl) 2011-09-30
EP2039785A1 (fr) 2009-03-25
BRPI0621816B1 (pt) 2015-06-02

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