WO2008002176A1 - Ladle steel deoxidation method - Google Patents
Ladle steel deoxidation method Download PDFInfo
- 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
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.
Abstract
Description
Claims
Priority Applications (13)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EA200802345A EA014276B1 (en) | 2006-06-30 | 2006-06-30 | Ladle steel deoxidation method |
BRPI0621816-4A BRPI0621816B1 (en) | 2006-06-30 | 2006-06-30 | Steel pan deoxidization method |
CN2006800551775A CN101522922B (en) | 2006-06-30 | 2006-06-30 | Ladle steel deoxidation method |
PCT/RU2006/000344 WO2008002176A1 (en) | 2006-06-30 | 2006-06-30 | Ladle steel deoxidation method |
AT06843948T ATE508210T1 (en) | 2006-06-30 | 2006-06-30 | PAN STEEL DEOXIDATION PROCESS |
SI200631073T SI2039785T1 (en) | 2006-06-30 | 2006-06-30 | Ladle steel deoxidation method |
PT06843948T PT2039785E (en) | 2006-06-30 | 2006-06-30 | Ladle steel deoxidation method |
ES06843948T ES2328895T3 (en) | 2006-06-30 | 2006-06-30 | STEEL DEOXIDATION PROCESS IN COLADA SPOON. |
DK06843948.8T DK2039785T3 (en) | 2006-06-30 | 2006-06-30 | Method for steel pocket deoxidation |
DE06843948T DE06843948T1 (en) | 2006-06-30 | 2006-06-30 | PFANNENSTAHLDESOXIDATIONSVERFAHREN |
EP06843948A EP2039785B1 (en) | 2006-06-30 | 2006-06-30 | Ladle steel deoxidation method |
DE602006021808T DE602006021808D1 (en) | 2006-06-30 | 2006-06-30 | PFANNENSTAHLDESOXIDATIONSVERFAHREN |
PL06843948T PL2039785T3 (en) | 2006-06-30 | 2006-06-30 | Ladle steel deoxidation method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/RU2006/000344 WO2008002176A1 (en) | 2006-06-30 | 2006-06-30 | Ladle steel deoxidation method |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2008002176A1 true WO2008002176A1 (en) | 2008-01-03 |
Family
ID=38845840
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/RU2006/000344 WO2008002176A1 (en) | 2006-06-30 | 2006-06-30 | Ladle steel deoxidation method |
Country Status (12)
Country | Link |
---|---|
EP (1) | EP2039785B1 (en) |
CN (1) | CN101522922B (en) |
AT (1) | ATE508210T1 (en) |
BR (1) | BRPI0621816B1 (en) |
DE (2) | DE602006021808D1 (en) |
DK (1) | DK2039785T3 (en) |
EA (1) | EA014276B1 (en) |
ES (1) | ES2328895T3 (en) |
PL (1) | PL2039785T3 (en) |
PT (1) | PT2039785E (en) |
SI (1) | SI2039785T1 (en) |
WO (1) | WO2008002176A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102031335A (en) * | 2010-11-01 | 2011-04-27 | 武汉科技大学 | Complex deoxidizer for smelting high heat input welded high-strength steel and using method thereof |
CN102146518A (en) * | 2011-04-02 | 2011-08-10 | 钢铁研究总院 | Refining agent for atmosphere protected electro-slag re-melting |
DE102015113241A1 (en) | 2015-08-11 | 2017-02-16 | Rhm Rohstoff-Handelsgesellschaft Mbh | Method for introducing additives into molten metals |
Citations (3)
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 (en) * | 1978-08-25 | 1981-05-07 | Центральный Ордена Трудового Красногознамени Научно-Исследовательскийинститут Черной Металлургии Им.И.П.Бардина | Method of steel production |
WO1998041658A1 (en) * | 1997-03-17 | 1998-09-24 | Stein - Industrie-Anlagen Inh. Christel Stein | Method for feeding granular solids into metal melts |
Family Cites Families (4)
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 (en) * | 1994-01-08 | 1995-12-20 | 中国冶金技术公司 | Iron and steel smelting process by using aluminium slag |
-
2006
- 2006-06-30 WO PCT/RU2006/000344 patent/WO2008002176A1/en active Application Filing
- 2006-06-30 EP EP06843948A patent/EP2039785B1/en active Active
- 2006-06-30 DK DK06843948.8T patent/DK2039785T3/en active
- 2006-06-30 PL PL06843948T patent/PL2039785T3/en unknown
- 2006-06-30 CN CN2006800551775A patent/CN101522922B/en not_active Expired - Fee Related
- 2006-06-30 SI SI200631073T patent/SI2039785T1/en unknown
- 2006-06-30 EA EA200802345A patent/EA014276B1/en not_active IP Right Cessation
- 2006-06-30 AT AT06843948T patent/ATE508210T1/en active
- 2006-06-30 PT PT06843948T patent/PT2039785E/en unknown
- 2006-06-30 ES ES06843948T patent/ES2328895T3/en active Active
- 2006-06-30 BR BRPI0621816-4A patent/BRPI0621816B1/en not_active IP Right Cessation
- 2006-06-30 DE DE602006021808T patent/DE602006021808D1/en active Active
- 2006-06-30 DE DE06843948T patent/DE06843948T1/en active Pending
Patent Citations (3)
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 (en) * | 1978-08-25 | 1981-05-07 | Центральный Ордена Трудового Красногознамени Научно-Исследовательскийинститут Черной Металлургии Им.И.П.Бардина | Method of steel production |
WO1998041658A1 (en) * | 1997-03-17 | 1998-09-24 | Stein - Industrie-Anlagen Inh. Christel Stein | Method for feeding granular solids into metal melts |
Non-Patent Citations (1)
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 |
---|---|
ES2328895T1 (en) | 2009-11-19 |
DE06843948T1 (en) | 2009-12-17 |
EA200802345A1 (en) | 2009-04-28 |
SI2039785T1 (en) | 2011-09-30 |
ES2328895T3 (en) | 2011-10-18 |
EP2039785B1 (en) | 2011-05-04 |
EP2039785A4 (en) | 2009-10-21 |
CN101522922A (en) | 2009-09-02 |
EP2039785A1 (en) | 2009-03-25 |
ATE508210T1 (en) | 2011-05-15 |
DK2039785T3 (en) | 2011-08-15 |
PL2039785T3 (en) | 2011-10-31 |
PT2039785E (en) | 2011-08-17 |
DE602006021808D1 (en) | 2011-06-16 |
BRPI0621816B1 (en) | 2015-06-02 |
EA014276B1 (en) | 2010-10-29 |
BRPI0621816A2 (en) | 2012-09-18 |
CN101522922B (en) | 2012-08-01 |
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