KR100334945B1 - 간이 레들 정련방법 - Google Patents
간이 레들 정련방법 Download PDFInfo
- Publication number
- KR100334945B1 KR100334945B1 KR1020007004415A KR20007004415A KR100334945B1 KR 100334945 B1 KR100334945 B1 KR 100334945B1 KR 1020007004415 A KR1020007004415 A KR 1020007004415A KR 20007004415 A KR20007004415 A KR 20007004415A KR 100334945 B1 KR100334945 B1 KR 100334945B1
- Authority
- KR
- South Korea
- Prior art keywords
- molten steel
- ladle
- lance
- refining
- calculated
- 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
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/072—Treatment with gases
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
- B23K26/06—Shaping the laser beam, e.g. by masks or multi-focusing
- B23K26/0604—Shaping the laser beam, e.g. by masks or multi-focusing by a combination of beams
- B23K26/0619—Shaping the laser beam, e.g. by masks or multi-focusing by a combination of beams with spots located on opposed surfaces of the workpiece
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/36—Removing material
- B23K26/362—Laser etching
- B23K26/364—Laser etching for making a groove or trench, e.g. for scribing a break initiation groove
-
- 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
- C21C7/068—Decarburising
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
- C21D8/1294—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties involving a localized treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/02—Iron or ferrous alloys
- B23K2103/04—Steel or steel alloys
-
- 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
- F27D2003/168—Introducing a fluid jet or current into the charge through a lance
-
- 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
- F27D27/00—Stirring devices for molten material
- F27D2027/002—Gas stirring
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Plasma & Fusion (AREA)
- Electromagnetism (AREA)
- Manufacturing & Machinery (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
Description
LH/a | 침지관 내화재의침식 현황 | 랜스의 침식 현황 | 열입 효율(%) | ||
본 발명 | 1 | 2.2 | 없다 | 약간 | 91 |
본 발명 | 2 | 2.8 | 없다 | 없다 | 95 |
본 발명 | 3 | 3.1 | 없다 | 없다 | 93 |
본 발명 | 4 | 3.4 | 약간 | 없다 | 92 |
비교예 | 5 | 1.9 | 없다 | 있다 | 90 |
비교예 | 6 | 1.8 | 없다 | 있다 | 93 |
비교예 | 7 | 3.7 | 있다 | 없다 | 92 |
비교예 | 8 | 4.0 | 있다 | 없다 | 94 |
Claims (7)
- 레들 내부로 침지관을 삽입하고 및 용강이 레들의 바닥을 통하여 관통한 불활성 가스 취입에 의해 교반되는 동안 산화 가스를 침지 관 내부 용강의 표면 위로 취입하는 것을 구성하고,랜스(lance)는 1.2α 내지 2.5α의 노즐 목부 직경(dt(mm))에 대한 노즐 출구 직경(d0(mm))의 비율 (d0/dt)을 가지는 것을 특징으로 하는 레들내 용강을 정련하기 위한 간이(簡易) 레들 정련 방법.여기에서 α는 식(1)에 의해 계산된다.α = [ (1/M {(1+0.2 x M2) / 1.2}3]1/2(1)여기에서 M = {5 x (P2/7- 1)}1/2이고, P는 배압(back pressure) (kgf/cm2, 절대 압력)이다.
- 제 1 항에 있어서, 상기에는 식 (3) 및 (9)에 의해 계산된 화점(火點) 직경 (a(mm))에 대한 식 (2) 내지 (8)에 의해 계산된 용강 표면 공동 깊이(L(mm))의 비율(L/a)은 0.5 내지 0.005로 한정되는 것을 특징으로 하는 레들내 용강을 정련하기 위한 간이 레들 정련 방법.0.016 x L1/2= Hc/(LH + L) (2)여기에서 LH는 랜스와 용강 표면사이의 거리(랜스 간격,mm)이고, 및 Hc는 식 (3)에 의해 계산된 분사 코어 길이(mm)이다.Hc= f x Mopx (4.2 + 1.1 x Mop 2) x dt (3)여기에서 Mop는 랜스 형상에 의존하고 및 식 (4)를 풀므로써 얻어진다.do/dt= [ (1/Mop) x { (1 + 0.2 x Mop 2) /1.2}3]1/2(4)그리고 f는 식 (5) 또는 (6)에 의해 계산된다.f = 0.8X - 0.06 (X < 0.7) (5)f = -2.7X4+ 17.7X3- 41X2+ 40X -13 (X > 0.7) (6)여기에서 X = Po/Pop로, 여기에서 Pop는 Mop을 사용한 식(7)에 의해 계산되고 및 Po는 식 (8)에 의해 계산된다.Pop= {(Mop 2/5) + 1}7/2(7)Po= F/(0.456 x n x dt 2) (8)여기에서 F는 산소 공급 속도(Nm3/hr)이고, 및 n은 노즐의 수이고, 및a = 0.425 x (LH - Hc) + dt(9)이다.
- 제 1 항 또는 제 2 항에 있어서, 화점 직경 (a(mm))에 대한 침지관 직경 (D(mm))의 비율(D/a)은 1.5 내지 8로 한정되는 것을 특징으로 하는 레들내 용강을 정련하기 위한 간이 레들 정련 방법.
- 제 1 항 내지 제 3 항 중 어느 한 항에 있어서, 화점 직경(a(mm))에 대한 랜스 간격(LH(mm))의 비율(LH/a)은 2 내지 3.5로 한정되는 것을 특징으로 하는 레들내 용강을 정련하기 위한 간이 레들 정련 방법.
- 제 1 항 내지 제 4 항 중 어느 한 항에 있어서, 산화 반응제는 침지 관의 내부가 대기 압력으로 유지되는 동안 침지관 내부 용강에 첨가되고, 및 상기 용강은 산화 반응제를 산화시키므로써 가열되는 것을 특징으로 하는 레들내 용강을 정련하기 위한 간이 레들 정련 방법.
- 제 1 항 내지 제 4 항 중 어느 한 항에 있어서, 상기 용강은 침지관의 내부가 대기압으로 유지되는 동안 미리 용강에 첨가되어진 산화 반응제를 산화시키므로써 가열되는 것을 특징으로 하는 레들내 용강을 정련하기 위한 간이 레들 정련 방법.
- 제 5 항 또는 제 6 항에 있어서, 대기 압력하에 산화 반응제를 산화시키므로써 용강을 가열하기 전 또는 후에, 산화 가스는 용강을 탈탄하기 위해 랜스를 관통하여 침지관 내부 용강 표면위로 취입되는 것을 특징으로 하는 레들내 용강을 정련하기 위한 간이 레들 정련 방법.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP239332/1998 | 1998-08-26 | ||
JP10239332A JP2000073118A (ja) | 1998-08-26 | 1998-08-26 | 簡易取鍋精錬方法 |
PCT/JP1999/004022 WO2000012768A1 (fr) | 1998-08-26 | 1999-07-27 | Procede simple d'affinage en coulee continue |
Publications (2)
Publication Number | Publication Date |
---|---|
KR20010031398A KR20010031398A (ko) | 2001-04-16 |
KR100334945B1 true KR100334945B1 (ko) | 2002-05-04 |
Family
ID=17043163
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1020007004415A KR100334945B1 (ko) | 1998-08-26 | 1999-07-27 | 간이 레들 정련방법 |
Country Status (11)
Country | Link |
---|---|
US (1) | US6309443B1 (ko) |
EP (1) | EP1026266B1 (ko) |
JP (1) | JP2000073118A (ko) |
KR (1) | KR100334945B1 (ko) |
CN (1) | CN1090241C (ko) |
AU (1) | AU733778B2 (ko) |
BR (1) | BR9906774A (ko) |
CA (1) | CA2306887C (ko) |
DE (1) | DE69937786T2 (ko) |
TW (1) | TW410235B (ko) |
WO (1) | WO2000012768A1 (ko) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20190070461A (ko) * | 2017-12-13 | 2019-06-21 | 주식회사 포스코 | 랜스 |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100518756B1 (ko) * | 2001-12-26 | 2005-10-06 | 주식회사 포스코 | 탈황제 분사에 사용되는 벤추리형 랜스 노즐 |
WO2008056835A1 (en) * | 2006-11-06 | 2008-05-15 | Posco Engineering & Construction Co., Ltd. | An apparatus for moving the snorkel in chemical heating in snorkel of refining utility |
CN115090867B (zh) * | 2022-07-18 | 2023-11-24 | 江苏盐电铸业有限公司 | 一种铸件浇注系统及其浇注方法 |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06278639A (ja) * | 1993-03-25 | 1994-10-04 | Mazda Motor Corp | 車両の制御装置 |
JP2897639B2 (ja) * | 1994-04-05 | 1999-05-31 | 住友金属工業株式会社 | 極低硫鋼の精錬方法 |
JP3410553B2 (ja) * | 1994-07-27 | 2003-05-26 | 新日本製鐵株式会社 | 含クロム溶鋼の脱炭精錬法 |
US5548241A (en) * | 1994-12-20 | 1996-08-20 | Sgs-Thomson Microelectronics, Inc. | Voltage reference circuit using an offset compensating current source |
US6017380A (en) * | 1995-01-06 | 2000-01-25 | Nippon Steel Corporation | Top-blown refining method in converter featuring excellent decarburization and top-blown lance for converter |
JPH08260029A (ja) * | 1995-03-23 | 1996-10-08 | Sumitomo Metal Ind Ltd | 真空脱ガス槽内2次燃焼用上吹酸素ランス |
JPH08278639A (ja) * | 1995-04-05 | 1996-10-22 | Konica Corp | カラー画像形成装置 |
JP2985720B2 (ja) * | 1995-04-10 | 1999-12-06 | 住友金属工業株式会社 | 極低炭素鋼の真空精錬方法 |
JPH0949013A (ja) * | 1995-08-04 | 1997-02-18 | Nippon Steel Corp | 真空脱ガス装置による溶鋼の精錬方法及び真空脱ガス装置 |
DE69624783T2 (de) * | 1995-08-01 | 2003-09-25 | Nippon Steel Corp., Tokio/Tokyo | Verfahren zum vakuumfeinen von stahlschmelze |
JP3526687B2 (ja) * | 1996-03-25 | 2004-05-17 | 新日本製鐵株式会社 | 低炭素鋼の精錬方法 |
-
1998
- 1998-08-26 JP JP10239332A patent/JP2000073118A/ja not_active Withdrawn
-
1999
- 1999-07-27 CN CN99801467A patent/CN1090241C/zh not_active Expired - Lifetime
- 1999-07-27 WO PCT/JP1999/004022 patent/WO2000012768A1/ja active IP Right Grant
- 1999-07-27 EP EP99931565A patent/EP1026266B1/en not_active Expired - Lifetime
- 1999-07-27 AU AU48023/99A patent/AU733778B2/en not_active Expired
- 1999-07-27 US US09/530,159 patent/US6309443B1/en not_active Expired - Lifetime
- 1999-07-27 BR BR9906774-9A patent/BR9906774A/pt not_active IP Right Cessation
- 1999-07-27 DE DE69937786T patent/DE69937786T2/de not_active Expired - Lifetime
- 1999-07-27 CA CA002306887A patent/CA2306887C/en not_active Expired - Lifetime
- 1999-07-27 KR KR1020007004415A patent/KR100334945B1/ko not_active IP Right Cessation
- 1999-07-30 TW TW088113043A patent/TW410235B/zh not_active IP Right Cessation
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20190070461A (ko) * | 2017-12-13 | 2019-06-21 | 주식회사 포스코 | 랜스 |
KR102088446B1 (ko) * | 2017-12-13 | 2020-03-12 | 주식회사 포스코 | 랜스 |
Also Published As
Publication number | Publication date |
---|---|
DE69937786D1 (de) | 2008-01-31 |
BR9906774A (pt) | 2000-09-26 |
CA2306887A1 (en) | 2000-03-09 |
CN1090241C (zh) | 2002-09-04 |
EP1026266A1 (en) | 2000-08-09 |
US6309443B1 (en) | 2001-10-30 |
CN1275169A (zh) | 2000-11-29 |
KR20010031398A (ko) | 2001-04-16 |
AU4802399A (en) | 2000-03-21 |
AU733778B2 (en) | 2001-05-24 |
CA2306887C (en) | 2004-11-09 |
EP1026266B1 (en) | 2007-12-19 |
TW410235B (en) | 2000-11-01 |
JP2000073118A (ja) | 2000-03-07 |
WO2000012768A1 (fr) | 2000-03-09 |
DE69937786T2 (de) | 2008-04-30 |
EP1026266A4 (en) | 2005-05-18 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US5902374A (en) | Vacuum refining method for molten steel | |
KR101018535B1 (ko) | 철합금의 정련 방법 | |
KR100334945B1 (ko) | 간이 레들 정련방법 | |
JPH0510406B2 (ko) | ||
JP3293023B2 (ja) | 溶鋼の真空吹酸方法 | |
JP4206736B2 (ja) | 上吹きランスとそれを用いた転炉操業方法 | |
JPH029645B2 (ko) | ||
JP3225747B2 (ja) | 溶鋼の真空脱ガス脱炭方法 | |
JP3655512B2 (ja) | 中高炭素鋼の吹酸昇熱方法 | |
JP2915772B2 (ja) | 直胴型浸漬管を用いた真空精錬炉への酸素ガス上吹き方法 | |
JPH08225823A (ja) | 溶融金属の精錬方法 | |
JPH0673436A (ja) | 溶鋼の真空脱炭処理方法 | |
JP5223228B2 (ja) | 溶銑の脱珪処理方法 | |
JPH0116585B2 (ko) | ||
JPH1161238A (ja) | ステンレス溶鋼の吹錬方法 | |
JPS62214122A (ja) | 取鍋内溶鋼の吹酸昇熱法 | |
JPH06306435A (ja) | プラズマエネルギーを用いた含Cr溶鋼の脱炭精錬方法 | |
JPH08337809A (ja) | 鋼スクラップの溶解法 | |
JPH04168214A (ja) | 極低炭素鋼の溶製方法及び、その装置 | |
JPH06220521A (ja) | 溶融金属の減圧下における精錬方法 | |
JPH08134527A (ja) | 取鍋内溶鋼の加熱方法 | |
JPH04254512A (ja) | 極低炭素鋼の溶製方法 | |
JPH08260026A (ja) | 取鍋精錬時のスプラッシュ抑制方法 | |
JPH07126728A (ja) | 溶鉄からの脱銅・脱錫法 | |
JPH10168513A (ja) | ステンレス鋼の真空下吹酸脱炭精錬方法 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A201 | Request for examination | ||
E701 | Decision to grant or registration of patent right | ||
GRNT | Written decision to grant | ||
FPAY | Annual fee payment |
Payment date: 20130321 Year of fee payment: 12 |
|
FPAY | Annual fee payment |
Payment date: 20140319 Year of fee payment: 13 |
|
FPAY | Annual fee payment |
Payment date: 20160318 Year of fee payment: 15 |
|
FPAY | Annual fee payment |
Payment date: 20170322 Year of fee payment: 16 |
|
FPAY | Annual fee payment |
Payment date: 20180329 Year of fee payment: 17 |
|
FPAY | Annual fee payment |
Payment date: 20190328 Year of fee payment: 18 |
|
EXPY | Expiration of term |