JP5704019B2 - 溶鋼の二次精錬方法および製造方法 - Google Patents
溶鋼の二次精錬方法および製造方法 Download PDFInfo
- Publication number
- JP5704019B2 JP5704019B2 JP2011176635A JP2011176635A JP5704019B2 JP 5704019 B2 JP5704019 B2 JP 5704019B2 JP 2011176635 A JP2011176635 A JP 2011176635A JP 2011176635 A JP2011176635 A JP 2011176635A JP 5704019 B2 JP5704019 B2 JP 5704019B2
- Authority
- JP
- Japan
- Prior art keywords
- concentration
- molten steel
- sample
- desulfurization
- analysis
- 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.)
- Active
Links
- 229910000831 Steel Inorganic materials 0.000 title claims description 121
- 239000010959 steel Substances 0.000 title claims description 121
- 238000000034 method Methods 0.000 title claims description 101
- 238000007670 refining Methods 0.000 title claims description 75
- 238000004519 manufacturing process Methods 0.000 title claims description 15
- 238000006477 desulfuration reaction Methods 0.000 claims description 83
- 230000023556 desulfurization Effects 0.000 claims description 83
- 238000004458 analytical method Methods 0.000 claims description 81
- 238000011282 treatment Methods 0.000 claims description 41
- 239000007789 gas Substances 0.000 claims description 35
- 239000003795 chemical substances by application Substances 0.000 claims description 29
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims description 28
- 238000010438 heat treatment Methods 0.000 claims description 25
- 230000006698 induction Effects 0.000 claims description 21
- 238000002795 fluorescence method Methods 0.000 claims description 19
- 239000000523 sample Substances 0.000 description 84
- 230000008569 process Effects 0.000 description 27
- 238000010521 absorption reaction Methods 0.000 description 18
- 238000005259 measurement Methods 0.000 description 17
- 238000012545 processing Methods 0.000 description 17
- 229910052717 sulfur Inorganic materials 0.000 description 17
- 239000011593 sulfur Substances 0.000 description 17
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 15
- 239000001301 oxygen Substances 0.000 description 15
- 229910052760 oxygen Inorganic materials 0.000 description 15
- 229910052751 metal Inorganic materials 0.000 description 14
- 239000002184 metal Substances 0.000 description 14
- 230000003009 desulfurizing effect Effects 0.000 description 13
- 239000000428 dust Substances 0.000 description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 10
- 238000002485 combustion reaction Methods 0.000 description 9
- 239000002994 raw material Substances 0.000 description 9
- 239000000463 material Substances 0.000 description 8
- 238000009849 vacuum degassing Methods 0.000 description 8
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 7
- 239000000919 ceramic Substances 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 6
- 238000007664 blowing Methods 0.000 description 5
- 229910052799 carbon Inorganic materials 0.000 description 5
- 229910052742 iron Inorganic materials 0.000 description 5
- 239000002904 solvent Substances 0.000 description 5
- 238000004611 spectroscopical analysis Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 238000002844 melting Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 238000009749 continuous casting Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 238000004993 emission spectroscopy Methods 0.000 description 3
- 230000005281 excited state Effects 0.000 description 3
- 238000010791 quenching Methods 0.000 description 3
- 230000000171 quenching effect Effects 0.000 description 3
- 239000002893 slag Substances 0.000 description 3
- 238000001179 sorption measurement Methods 0.000 description 3
- 238000009628 steelmaking Methods 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 2
- 229910000655 Killed steel Inorganic materials 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 2
- 235000011941 Tilia x europaea Nutrition 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 229910001882 dioxygen Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005283 ground state Effects 0.000 description 2
- 239000001307 helium Substances 0.000 description 2
- 229910052734 helium Inorganic materials 0.000 description 2
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000004571 lime Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 239000012925 reference material Substances 0.000 description 2
- 238000004904 shortening Methods 0.000 description 2
- 238000002798 spectrophotometry method Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- RBTBFTRPCNLSDE-UHFFFAOYSA-N 3,7-bis(dimethylamino)phenothiazin-5-ium Chemical compound C1=CC(N(C)C)=CC2=[S+]C3=CC(N(C)C)=CC=C3N=C21 RBTBFTRPCNLSDE-UHFFFAOYSA-N 0.000 description 1
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 238000002835 absorbance Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000000538 analytical sample Substances 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 1
- 238000011088 calibration curve Methods 0.000 description 1
- 238000009614 chemical analysis method Methods 0.000 description 1
- 238000005352 clarification Methods 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 238000005261 decarburization Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000012921 fluorescence analysis Methods 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000010436 fluorite Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- XZWYZXLIPXDOLR-UHFFFAOYSA-N metformin Chemical compound CN(C)C(=N)NC(N)=N XZWYZXLIPXDOLR-UHFFFAOYSA-N 0.000 description 1
- 229960000907 methylthioninium chloride Drugs 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 238000004445 quantitative analysis Methods 0.000 description 1
- 238000012950 reanalysis Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Description
CaO+S → CaS+O
また、発光分光分析法は、赤外線吸収法と比較して分析精度の点で劣る傾向にある。そのため、特に、低硫鋼や極低硫鋼など、S濃度を正確に分析する必要がある場合には、赤外線吸収法が用いられることが多い。しかし、赤外線吸収法であっても、例えば、JIS G1215−4の表7では、S濃度が5〜10massppmレベルの極低硫鋼で±2massppm、20〜30massppmレベルの低硫鋼で±5massppm以上の誤差を許容しているように、極低硫鋼や低硫鋼を対象とした場合には、決して十分な分析精度を有するものではない。
以下、本発明における紫外蛍光法を用いたS濃度の分析方法について説明する。
まず、試料5および助燃剤をセラミックスるつぼ31に投入する。次に、純酸素供給手段2から高周波誘導加熱炉3に純酸素を連続的に供給すると共に、コイル32に交流電流を印加して、純酸素雰囲気下で試料5を燃焼(酸化)させる。そして、試料5の燃焼により生成したSO2含有ガス中に含まれるダストを、ダストフィルタ4で除去した後、紫外蛍光分析器6でSO2含有ガス中のSO2量を測定することにより、試料5中に含まれているS濃度を定量する。
なお、溶鋼からS濃度分析のための試料を採取する方法については、例えば、JIS G1215−3(2010)に記載された方法などを用いることができるが、いかなる方法でもよい。
まず、転炉出鋼後の溶鋼を、特許文献1〜4に記載の取鍋精錬設備(LF)を用いた二次精錬で脱硫する場合について説明する。ここで、上記取鍋精錬設備(LF)とは、取鍋に耐火物製の蓋を被せて内部を非酸化雰囲気にできるようにし、さらに、上記蓋には、スラグ中に浸漬し、溶鋼をアーク放電加熱する電極と、溶鋼中にCaOやアルミナ系の脱硫剤や媒溶剤等の副原料を不活性ガスで吹込むインジェクションサンス、および、溶鋼を撹拌するために不活性ガスを吹込む別のランスあるいは底吹き羽口を配設したものである。
2:純酸素供給手段
21:純酸素供給ライン
22:流量調整器
3:高周波誘導加熱炉
31:セラミックスるつぼ
32:コイル
4:ダストフィルタ
5:試料
6:紫外蛍光分析器
Claims (4)
- 転炉から出鋼した溶鋼を二次精錬する方法において、
精錬中の溶鋼から採取した試料のS濃度を分析し、その分析値に基づいて、その後の脱硫処理条件を決定するに当たり、
上記S濃度を、試料を純酸素雰囲気下で高周波誘導加熱により燃焼、酸化させて、溶鋼中のSをSO 2 とする高周波誘導加熱工程と、
上記高周波誘導加熱工程で生成したSO 2 含有ガスを、紫外蛍光法で分析して試料中のS濃度を定量する分析工程を含む方法で分析することを特徴とする溶鋼の二次精錬方法。 - 上記脱硫処理は、Sの目標濃度が0.003mass%以下であることを特徴とする請求項1に記載の溶鋼の二次精錬方法。
- 上記脱硫処理条件は、脱硫処理における脱硫剤投入量および処理時間のいずれか1以上であることを特徴とする請求項1または2に記載の溶鋼の二次精錬方法。
- 請求項1〜3のいずれか1項に記載の二次精錬方法を用いることを特徴とする溶鋼の製造方法。
Priority Applications (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2011176635A JP5704019B2 (ja) | 2011-08-12 | 2011-08-12 | 溶鋼の二次精錬方法および製造方法 |
KR1020147002387A KR101579011B1 (ko) | 2011-08-12 | 2012-08-08 | 용강의 탈황 방법, 용강의 2차 정련 방법 및 용강의 제조 방법 |
EP12823682.5A EP2722405B1 (en) | 2011-08-12 | 2012-08-08 | Molten steel desulfurization method, molten steel secondary refining method, and molten steel manufacturing method |
US14/123,688 US10287644B2 (en) | 2011-08-12 | 2012-08-08 | Molten steel desulfurization method, molten steel secondary refining method, and molten steel manufacturing method |
PCT/JP2012/070204 WO2013024766A1 (ja) | 2011-08-12 | 2012-08-08 | 溶鋼の脱硫方法、溶鋼の二次精錬方法および溶鋼の製造方法 |
BR112014002792-7A BR112014002792B1 (pt) | 2011-08-12 | 2012-08-08 | método de fabricação de aço fundido |
CN201280024706.0A CN103562415B (zh) | 2011-08-12 | 2012-08-08 | 钢水的脱硫方法、钢水的二次精炼方法及钢水的制造方法 |
US15/592,693 US11035014B2 (en) | 2011-08-12 | 2017-05-11 | Molten steel desulfurization method, molten steel secondary refining method, and molten steel manufacturing method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2011176635A JP5704019B2 (ja) | 2011-08-12 | 2011-08-12 | 溶鋼の二次精錬方法および製造方法 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2013040359A JP2013040359A (ja) | 2013-02-28 |
JP5704019B2 true JP5704019B2 (ja) | 2015-04-22 |
Family
ID=47889014
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2011176635A Active JP5704019B2 (ja) | 2011-08-12 | 2011-08-12 | 溶鋼の二次精錬方法および製造方法 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP5704019B2 (ja) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5177263B2 (ja) * | 2011-08-12 | 2013-04-03 | Jfeスチール株式会社 | 溶銑の脱硫方法 |
JP6176209B2 (ja) * | 2014-08-28 | 2017-08-09 | Jfeスチール株式会社 | 炭素含有鋼の精錬方法 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5983054A (ja) * | 1982-11-04 | 1984-05-14 | Horiba Ltd | 金属中の元素分析装置 |
JPH0310014A (ja) * | 1989-06-08 | 1991-01-17 | Nippon Steel Corp | 二次精錬の終点制御方法 |
JPH1151924A (ja) * | 1997-08-09 | 1999-02-26 | Horiba Ltd | 元素分析方法 |
JP2000065699A (ja) * | 1998-08-19 | 2000-03-03 | Mitsubishi Chemicals Corp | 分析用試料燃焼装置及び分析用試料燃焼装置における不活性ガス,酸素含有ガス供給制御方法並びに試料燃焼装置を有する分析システム |
JP5151448B2 (ja) * | 2007-12-17 | 2013-02-27 | 新日鐵住金株式会社 | 極低硫極低酸素極低窒素鋼の溶製方法 |
JP4840516B2 (ja) * | 2010-02-18 | 2011-12-21 | Jfeスチール株式会社 | 金属試料中の硫黄の分析方法および分析装置 |
-
2011
- 2011-08-12 JP JP2011176635A patent/JP5704019B2/ja active Active
Also Published As
Publication number | Publication date |
---|---|
JP2013040359A (ja) | 2013-02-28 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US11035014B2 (en) | Molten steel desulfurization method, molten steel secondary refining method, and molten steel manufacturing method | |
JP5704019B2 (ja) | 溶鋼の二次精錬方法および製造方法 | |
JP5896153B2 (ja) | 溶鋼の脱硫方法および製造方法 | |
JP5177263B2 (ja) | 溶銑の脱硫方法 | |
JP5375419B2 (ja) | 清浄鋼の溶製方法 | |
JP4686917B2 (ja) | 真空脱ガス設備における溶鋼の溶製方法 | |
JP5079382B2 (ja) | 溶鋼の精錬方法 | |
JP5402342B2 (ja) | レードルノズルの詰まり防止方法 | |
JP6436121B2 (ja) | ステンレス鋼溶湯の二次精錬方法 | |
JP2885620B2 (ja) | 転炉精錬法 | |
JP5669694B2 (ja) | 銑鉄中の硫黄の分析方法 | |
JP2001234230A (ja) | 脱炭精錬の終点判定方法 | |
JP5884187B2 (ja) | 炭素鋼の精錬方法 | |
JP2021050415A (ja) | 溶鋼中の水素濃度推定方法及び溶鋼の真空脱ガス精錬方法 | |
JP2005206877A (ja) | 転炉吹錬時の炭素濃度の推定方法 | |
KR100905583B1 (ko) | 소음치를 이용한 슬래그 두께 측정방법 및 용강의 탈황방법 | |
JPH09249910A (ja) | Rh脱ガスでの溶鋼昇熱方法 | |
JP2006052420A (ja) | 溶鋼昇温時における成分元素濃度の推定方法 | |
JP2001234222A (ja) | 溶銑の脱燐方法 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20140220 |
|
A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20141021 |
|
A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20141208 |
|
TRDD | Decision of grant or rejection written | ||
A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20150127 |
|
A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20150209 |
|
R150 | Certificate of patent or registration of utility model |
Ref document number: 5704019 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |