JP2009114491A - Rh真空脱ガス装置による溶鋼の精錬方法 - Google Patents
Rh真空脱ガス装置による溶鋼の精錬方法 Download PDFInfo
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- JP2009114491A JP2009114491A JP2007287102A JP2007287102A JP2009114491A JP 2009114491 A JP2009114491 A JP 2009114491A JP 2007287102 A JP2007287102 A JP 2007287102A JP 2007287102 A JP2007287102 A JP 2007287102A JP 2009114491 A JP2009114491 A JP 2009114491A
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- molten steel
- vacuum
- vacuum degassing
- degassing apparatus
- deoxidation
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 89
- 239000010959 steel Substances 0.000 title claims abstract description 89
- 238000009849 vacuum degassing Methods 0.000 title claims abstract description 55
- 238000007670 refining Methods 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims abstract description 25
- 229910001209 Low-carbon steel Inorganic materials 0.000 claims abstract description 33
- 230000004907 flux Effects 0.000 claims abstract description 23
- 239000002893 slag Substances 0.000 abstract description 32
- 238000005261 decarburization Methods 0.000 abstract description 30
- 238000011282 treatment Methods 0.000 abstract description 20
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 230000003628 erosive effect Effects 0.000 abstract description 5
- 238000007796 conventional method Methods 0.000 abstract 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 88
- 239000000395 magnesium oxide Substances 0.000 description 44
- 239000007789 gas Substances 0.000 description 22
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 21
- 239000002184 metal Substances 0.000 description 14
- 229910052751 metal Inorganic materials 0.000 description 14
- 238000010992 reflux Methods 0.000 description 14
- 239000000292 calcium oxide Substances 0.000 description 11
- 235000012255 calcium oxide Nutrition 0.000 description 11
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 10
- 239000001301 oxygen Substances 0.000 description 10
- 229910052760 oxygen Inorganic materials 0.000 description 10
- 238000002844 melting Methods 0.000 description 9
- 230000008018 melting Effects 0.000 description 9
- 229910004261 CaF 2 Inorganic materials 0.000 description 8
- 230000001174 ascending effect Effects 0.000 description 8
- 230000008569 process Effects 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 7
- 239000002245 particle Substances 0.000 description 7
- 230000008439 repair process Effects 0.000 description 7
- 229910004298 SiO 2 Inorganic materials 0.000 description 6
- 238000007664 blowing Methods 0.000 description 6
- 238000006477 desulfuration reaction Methods 0.000 description 6
- 230000023556 desulfurization Effects 0.000 description 6
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 5
- 230000007423 decrease Effects 0.000 description 5
- 230000003009 desulfurizing effect Effects 0.000 description 5
- 230000001965 increasing effect Effects 0.000 description 5
- 239000002994 raw material Substances 0.000 description 5
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 4
- 239000000956 alloy Substances 0.000 description 4
- 229910001882 dioxygen Inorganic materials 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- 230000009257 reactivity Effects 0.000 description 4
- 238000005507 spraying Methods 0.000 description 4
- 229910017082 Fe-Si Inorganic materials 0.000 description 3
- 229910017133 Fe—Si Inorganic materials 0.000 description 3
- 239000012298 atmosphere Substances 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 238000007654 immersion Methods 0.000 description 3
- 230000000630 rising effect Effects 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 238000009628 steelmaking Methods 0.000 description 3
- 239000003963 antioxidant agent Substances 0.000 description 2
- 230000003078 antioxidant effect Effects 0.000 description 2
- 230000003749 cleanliness Effects 0.000 description 2
- 238000010828 elution Methods 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 229910052748 manganese Inorganic materials 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000003607 modifier Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000011819 refractory material Substances 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 229910000532 Deoxidized steel Inorganic materials 0.000 description 1
- 229910002551 Fe-Mn Inorganic materials 0.000 description 1
- 229910000655 Killed steel Inorganic materials 0.000 description 1
- 238000010306 acid treatment Methods 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000012159 carrier gas Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 238000006356 dehydrogenation reaction Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 229910000514 dolomite Inorganic materials 0.000 description 1
- 239000010459 dolomite Substances 0.000 description 1
- 230000003028 elevating effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- -1 magnesia clinker Chemical compound 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 150000001247 metal acetylides Chemical class 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 238000002407 reforming Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000002436 steel type Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
Images
Classifications
-
- 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
Landscapes
- Treatment Of Steel In Its Molten State (AREA)
Abstract
【解決手段】 未脱酸状態の溶鋼3をRH真空脱ガス装置1により真空脱炭処理し、その後、脱酸用Si源をRH真空槽5内の溶鋼に添加して脱酸処理し、Al含有量が0.001質量%以下であるAlレス極低炭素鋼をRH真空脱ガス装置で溶製する、RH真空脱ガス装置による溶鋼の精錬方法であって、真空脱炭処理末期の脱酸用Si源の投入前、脱酸用Si源の投入と同時、脱酸用Si源の投入後、のうちの少なくとも何れか1つの時期に、RH真空槽内の溶鋼にMgOを主成分とするフラックス16を添加する。
【選択図】 図1
Description
2 取鍋
3 溶鋼
4 スラグ
5 RH真空槽
6 上部槽
7 下部槽
7a 環流管
8 上昇側浸漬管
9 下降側浸漬管
10 環流用ガス吹き込み管
11 ダクト
12 原料投入口
13 上吹きランス
14 ホッパー
15 シュート
16 含MgOフラックス
Claims (1)
- 未脱酸溶鋼をRH真空脱ガス装置により真空脱炭処理し、その後、脱酸用Si源をRH真空槽内の溶鋼に添加して脱酸処理し、Al含有量が0.001質量%以下であるAlレス極低炭素鋼をRH真空脱ガス装置で溶製する、RH真空脱ガス装置による溶鋼の精錬方法であって、真空脱炭処理末期の脱酸用Si源の投入前、脱酸用Si源の投入と同時、脱酸用Si源の投入後、のうちの少なくとも何れか1つの時期に、RH真空槽内の溶鋼にMgOを主成分とするフラックスを添加することを特徴とする、RH真空脱ガス装置による溶鋼の精錬方法。
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2020183841A1 (ja) * | 2019-03-13 | 2020-09-17 | Jfeスチール株式会社 | Ti含有極低炭素鋼の製造方法 |
CN115232923A (zh) * | 2022-07-27 | 2022-10-25 | 辽宁科技大学 | 一种vd炉精炼钢液的方法 |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5013204A (ja) * | 1973-06-08 | 1975-02-12 | ||
JPS5928514A (ja) * | 1982-08-06 | 1984-02-15 | Kawasaki Steel Corp | ステンレス鋼の精錬方法 |
JPS62158813A (ja) * | 1986-01-06 | 1987-07-14 | Kawasaki Steel Corp | ステンレス鋼の精錬方法 |
JPH0849012A (ja) * | 1994-08-04 | 1996-02-20 | Kawasaki Steel Corp | 取鍋耐火物の溶損抑制方法 |
JPH10158720A (ja) * | 1996-11-27 | 1998-06-16 | Nippon Steel Corp | ステンレス鋼の高清浄化精錬法 |
JPH11293329A (ja) * | 1998-04-07 | 1999-10-26 | Nkk Corp | 清浄性に優れた極低炭素Siキルド鋼の製造方法 |
JP2006257519A (ja) * | 2005-03-18 | 2006-09-28 | Nippon Steel Corp | 耐火物の保護方法 |
-
2007
- 2007-11-05 JP JP2007287102A patent/JP5315669B2/ja active Active
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5013204A (ja) * | 1973-06-08 | 1975-02-12 | ||
JPS5928514A (ja) * | 1982-08-06 | 1984-02-15 | Kawasaki Steel Corp | ステンレス鋼の精錬方法 |
JPS62158813A (ja) * | 1986-01-06 | 1987-07-14 | Kawasaki Steel Corp | ステンレス鋼の精錬方法 |
JPH0849012A (ja) * | 1994-08-04 | 1996-02-20 | Kawasaki Steel Corp | 取鍋耐火物の溶損抑制方法 |
JPH10158720A (ja) * | 1996-11-27 | 1998-06-16 | Nippon Steel Corp | ステンレス鋼の高清浄化精錬法 |
JPH11293329A (ja) * | 1998-04-07 | 1999-10-26 | Nkk Corp | 清浄性に優れた極低炭素Siキルド鋼の製造方法 |
JP2006257519A (ja) * | 2005-03-18 | 2006-09-28 | Nippon Steel Corp | 耐火物の保護方法 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2020183841A1 (ja) * | 2019-03-13 | 2020-09-17 | Jfeスチール株式会社 | Ti含有極低炭素鋼の製造方法 |
CN115232923A (zh) * | 2022-07-27 | 2022-10-25 | 辽宁科技大学 | 一种vd炉精炼钢液的方法 |
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