JP5079005B2 - 吸酸及び吸窒が減少した合金鉄投入装置及び投入方法 - Google Patents
吸酸及び吸窒が減少した合金鉄投入装置及び投入方法 Download PDFInfo
- Publication number
- JP5079005B2 JP5079005B2 JP2009525475A JP2009525475A JP5079005B2 JP 5079005 B2 JP5079005 B2 JP 5079005B2 JP 2009525475 A JP2009525475 A JP 2009525475A JP 2009525475 A JP2009525475 A JP 2009525475A JP 5079005 B2 JP5079005 B2 JP 5079005B2
- Authority
- JP
- Japan
- Prior art keywords
- inert gas
- supply pipe
- alloy iron
- molten steel
- lower supply
- 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
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
- C21C7/0006—Adding metallic additives
-
- 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
- C21C7/0037—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00 by injecting powdered material
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D3/00—Charging; Discharging; Manipulation of charge
- F27D3/16—Introducing a fluid jet or current into the charge
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D3/00—Charging; Discharging; Manipulation of charge
- F27D3/18—Charging particulate material using a fluid carrier
-
- 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
- C21C2300/00—Process aspects
- C21C2300/06—Modeling of the process, e.g. for control purposes; CII
-
- 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
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/52—Manufacture of steel in electric furnaces
- C21C5/5264—Manufacture of alloyed steels including ferro-alloys
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Treatment Of Steel In Its Molten State (AREA)
- Furnace Charging Or Discharging (AREA)
Description
[式1]
y=h0−x−c
(ここで、yは、前記取鍋カバーの内側から前記下部供給管の終端部までの距離[mm]、h0は、前記取鍋カバーの内側から前記取鍋の底部までの距離[mm]、xは、前記取鍋の底部から前記溶鋼表面までの距離[mm]、cは、前記溶鋼表面から前記下部供給管の終端部までの距離[mm]。)
[式2]
w=−51.1×ln(x)+454
(ここで、wは、前記溶鋼の量[ton]。)
y=(h0+x)−c
w=−51.1×ln(x)+454
102、302、502...中間供給管
103、303、503...下部供給管
123、323、523...不活性ガス遮断部
133、333、533...不活性ガス供給部
550’’...単環構造体
550’...複環構造体
570...拡散部
F...合金鉄
M...溶鋼
S...スラグ
Claims (8)
- ホッパから合金鉄が供給されてこれを取鍋にまでスラグ及び溶鋼中への浸漬なく投入し、上部、傾斜を有する中間及び下部に細分され、所定の中空を有する供給管と、
前記供給管の前記中間に連通して分岐装着され、前記合金鉄の投入時に同時に流入する空気を第1不活性ガスによって遮断する不活性ガス遮断部と、
前記供給管の前記下部の基端部に連通して分岐装着され、前記合金鉄の投入経路上に第2不活性ガスを吹き込む不活性ガス供給部と、
前記供給管の下部外側の任意の1つの部位に、前記下部の軸方向に対してこれを包むように構成され、前記下部の終端部方向に第3不活性ガスを噴射する不活性ガス噴射部と、
前記不活性ガス噴射部から前記供給管を包んで噴射される前記第3不活性ガスが前記供給管の終端部で拡散する拡散部と
を備え、
前記不活性ガス噴射部は、
前記第3不活性ガスを均一に分配する第1環構造体と、
前記第1環構造体で均一に分配された前記第3不活性ガスが前記下部供給管を包んでその終端部方向に噴射されるようにする第2環構造体と、
前記第1環構造体と前記第2環構造体とを連通する複数の連結体と
を備える複環構造体である、吸酸及び吸窒が減少した合金鉄投入装置。 - 前記不活性ガス噴射部には、
前記供給管の下部の終端部に所定のスリットが形成される、請求項1に記載の吸酸及び吸窒が減少した合金鉄投入装置。 - 前記スリットの幅は、3.0mm以下である、請求項2に記載の吸酸及び吸窒が減少した合金鉄投入装置。
- 前記スリットの幅は、0.1mm以上3.0mm以下である、請求項3に記載の吸酸及び吸窒が減少した合金鉄投入装置。
- 前記拡散部は、その内部が前記供給管の下部の内部となす内部拡散角が0゜超過90゜未満である、請求項1に記載の吸酸及び吸窒が減少した合金鉄投入装置。
- 底部にポーラスプラグが設けられた取鍋内にスラグにより覆われた溶鋼が収容され、ホッパに貯留された合金鉄が前記取鍋の上部から、上部、中間及び下部供給管を介して前記溶鋼に投入される合金鉄投入方法であって、
前記下部供給管の終端部を下降するステップと、
前記中間供給管に第1不活性ガスを投入するステップと、
前記下部供給管の基端部に第2不活性ガスを投入するステップと、
前記下部供給管の外側を包んで終端部方向に噴射される第3不活性ガスを提供するステップと、
前記合金鉄を、前記上部、中間及び下部供給管を順次に経て前記溶鋼内に投入するステップと
を含む、吸酸及び吸窒が減少した合金鉄投入方法。 - 前記第2不活性ガスの単位時間当たりの噴射量は、5〜50Nm3/hrである、請求項6に記載の吸酸及び吸窒が減少した合金鉄投入方法。
- 前記第3不活性ガスの単位時間当たりの噴射量は、10〜100Nm3/hrである、請求項6に記載の吸酸及び吸窒が減少した合金鉄投入方法。
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020060079693A KR100812018B1 (ko) | 2006-08-23 | 2006-08-23 | 확산부가 구비된 합금철 투입장치 |
KR1020060079692A KR100812017B1 (ko) | 2006-08-23 | 2006-08-23 | 흡산 및 흡질이 감소된 래들처리방법 |
KR10-2006-0079692 | 2006-08-23 | ||
KR10-2006-0079693 | 2006-08-23 | ||
PCT/KR2006/005406 WO2008023863A1 (en) | 2006-08-23 | 2006-12-12 | A ferro-alloy inserting apparatus with reduced absorption of oxygen and absorption of nitrogen and inserting method thereof |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2010501726A JP2010501726A (ja) | 2010-01-21 |
JP5079005B2 true JP5079005B2 (ja) | 2012-11-21 |
Family
ID=39106930
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2009525475A Expired - Fee Related JP5079005B2 (ja) | 2006-08-23 | 2006-12-12 | 吸酸及び吸窒が減少した合金鉄投入装置及び投入方法 |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2054533A4 (ja) |
JP (1) | JP5079005B2 (ja) |
WO (1) | WO2008023863A1 (ja) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101853769B1 (ko) | 2016-08-29 | 2018-05-02 | 주식회사 포스코 | 합금강 제조방법 |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2858125A (en) * | 1955-02-01 | 1958-10-28 | Air Reduction | Reagent feeding apparatus |
US3231371A (en) * | 1962-04-16 | 1966-01-25 | Combustion Eng | Cast iron resistant to heat growth and method for producing the same |
BE798224A (fr) * | 1973-08-24 | 1973-10-15 | Inst Chernoi Metallurgii | Procede de traitement de la fonte liquide par le magnesium dans des capacites et dispositif pour le realiser |
JPS579821A (en) * | 1980-06-18 | 1982-01-19 | Kawasaki Steel Corp | Method of addition of auxiliary raw material or the like into ladle |
JPS6345674Y2 (ja) * | 1986-05-12 | 1988-11-28 | ||
JPH059552A (ja) | 1991-07-09 | 1993-01-19 | Nippon Steel Corp | 上吹きランス方式の取鍋精錬装置 |
US5211744A (en) | 1991-10-02 | 1993-05-18 | Premelt Systems, Inc. | Method and means for improving molten metal furnace charging efficiency |
US5705123A (en) * | 1994-12-15 | 1998-01-06 | Hayes Wheels International, Inc. | Metal chip reclamation system |
US5919283A (en) * | 1996-11-06 | 1999-07-06 | Premelt Pump, Inc. | Method and apparatus for introducing metal chips into molten metal bath |
US6409962B1 (en) * | 2000-10-02 | 2002-06-25 | Rossborough Manufacturing Co. | Powder injector for ladle |
JP3867683B2 (ja) * | 2003-06-09 | 2007-01-10 | 住友金属工業株式会社 | 溶鋼精錬装置 |
-
2006
- 2006-12-12 EP EP06824112A patent/EP2054533A4/en not_active Withdrawn
- 2006-12-12 WO PCT/KR2006/005406 patent/WO2008023863A1/en active Search and Examination
- 2006-12-12 JP JP2009525475A patent/JP5079005B2/ja not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
WO2008023863A1 (en) | 2008-02-28 |
JP2010501726A (ja) | 2010-01-21 |
EP2054533A4 (en) | 2009-12-30 |
EP2054533A1 (en) | 2009-05-06 |
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