KR950016969A - How to prevent nozzle clogging during continuous casting of low silicon steel - Google Patents
How to prevent nozzle clogging during continuous casting of low silicon steel Download PDFInfo
- Publication number
- KR950016969A KR950016969A KR1019930031106A KR930031106A KR950016969A KR 950016969 A KR950016969 A KR 950016969A KR 1019930031106 A KR1019930031106 A KR 1019930031106A KR 930031106 A KR930031106 A KR 930031106A KR 950016969 A KR950016969 A KR 950016969A
- Authority
- KR
- South Korea
- Prior art keywords
- continuous casting
- less
- nozzle clogging
- low
- molten steel
- 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.)
- Granted
Links
- 238000009749 continuous casting Methods 0.000 title claims abstract description 7
- 229910000976 Electrical steel Inorganic materials 0.000 title claims abstract 3
- 230000003647 oxidation Effects 0.000 claims abstract description 3
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 3
- 239000002893 slag Substances 0.000 claims abstract description 3
- 229910000831 Steel Inorganic materials 0.000 claims abstract 6
- 239000010959 steel Substances 0.000 claims abstract 6
- 238000007872 degassing Methods 0.000 claims abstract 5
- 238000004519 manufacturing process Methods 0.000 claims abstract 3
- 229910017082 Fe-Si Inorganic materials 0.000 claims abstract 2
- 229910017133 Fe—Si Inorganic materials 0.000 claims abstract 2
- 230000005587 bubbling Effects 0.000 claims abstract 2
- 239000012535 impurity Substances 0.000 claims abstract 2
- 238000007670 refining Methods 0.000 claims 1
- 238000000034 method Methods 0.000 abstract 2
- 229910000565 Non-oriented electrical steel Inorganic materials 0.000 abstract 1
- 229910052710 silicon Inorganic materials 0.000 abstract 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000004626 scanning electron microscopy Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/001—Continuous casting of metals, i.e. casting in indefinite lengths of specific alloys
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
본발명은 Si이 낮고, AI이 첨가되지 않은 저급의 무방향성 전기강판 제조시전로-RH 탈가스 처리로 제조한 용강을 연속주조할 시 발생되는 노즐 막힘을 방지하는 방법에 관한 것으로써, 저 Si강 특히 Mn/Si 비 @ 0.5이고, Si/AI 비가 낮은 강을 제조할 때 노즐 막힘을 방지하여 안정적인 주조성을 확보하고자 하는데, 그 목적이 있다.The present invention relates to a method for preventing nozzle clogging caused by continuous casting of molten steel manufactured by RH degassing treatment in a low-oriented non-oriented electrical steel sheet manufacturing system having low Si and no AI. The purpose of this invention is to ensure stable castability by preventing nozzle clogging when producing steel, in particular Mn / Si ratio @ 0.5 and low Si / AI ratio.
본 발명은 전로정련된 용강을 래들로 출강한 후, 버블링 및 탈가스 처리한 다음, 연속주조하여 C : 100ppm이하, Si : 0.5%이하, Mn : 0.15∼0.25%, P : 0.05∼0.07%, 전(Total) AI : 50ppm이하, 잔부 Fe 및 기타불가피한 불순물로 조성되는 저규소강을 제조함에 있어서, 래들 슬래그의 산화도(T.Fe+MnO+P2O5)가 16.0% 이하가 되도록 하고; 그리고 탈가스 처리시 탈산제로서 Fe-Si과 함께 AI을 0.015∼0.03㎏/톤-용강을 투입하여 연속주조시 노즐막힘을 방지하는 방법을 그 요지로 한다.In the present invention, the molten steel is converted to ladle, bubbling and degassing, followed by continuous casting, C: 100 ppm or less, Si: 0.5% or less, Mn: 0.15 to 0.25%, P: 0.05 to 0.07% , Total AI: 50ppm or less, in the manufacture of low silicon steel composed of the balance Fe and other unavoidable impurities, so that the oxidation degree (T.Fe + MnO + P 2 O 5 ) of the ladle slag is 16.0% or less and; As a main point, a method of preventing nozzle clogging during continuous casting by adding 0.015 to 0.03 kg / ton of molten steel with Fe-Si as a deoxidizer during degassing treatment is introduced.
Description
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.
제1도: 종래의 방법에 따라 연속 주조시 노즐에 부착한 개재물의 SEM 분석 결과사진,Figure 1: SEM analysis of inclusions attached to the nozzle during continuous casting according to the conventional method,
제2도: 슬래그 산화도와 AI 투입량이 노즐 막힘에 미치는 영향을 나타내는 그래프.Figure 2: Graph showing the effect of slag oxidation and AI input on nozzle clogging.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019930031106A KR960000324B1 (en) | 1993-12-29 | 1993-12-29 | Method of preventing nozzle stop |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019930031106A KR960000324B1 (en) | 1993-12-29 | 1993-12-29 | Method of preventing nozzle stop |
Publications (2)
Publication Number | Publication Date |
---|---|
KR950016969A true KR950016969A (en) | 1995-07-20 |
KR960000324B1 KR960000324B1 (en) | 1996-01-05 |
Family
ID=19374117
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1019930031106A Expired - Fee Related KR960000324B1 (en) | 1993-12-29 | 1993-12-29 | Method of preventing nozzle stop |
Country Status (1)
Country | Link |
---|---|
KR (1) | KR960000324B1 (en) |
-
1993
- 1993-12-29 KR KR1019930031106A patent/KR960000324B1/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
KR960000324B1 (en) | 1996-01-05 |
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A201 | Request for examination | ||
PA0109 | Patent application |
Patent event code: PA01091R01D Comment text: Patent Application Patent event date: 19931229 |
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PA0201 | Request for examination |
Patent event code: PA02012R01D Patent event date: 19931229 Comment text: Request for Examination of Application |
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E902 | Notification of reason for refusal | ||
PE0902 | Notice of grounds for rejection |
Comment text: Notification of reason for refusal Patent event date: 19950925 Patent event code: PE09021S01D |
|
G160 | Decision to publish patent application | ||
PG1605 | Publication of application before grant of patent |
Comment text: Decision on Publication of Application Patent event code: PG16051S01I Patent event date: 19951208 |
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E701 | Decision to grant or registration of patent right | ||
PE0701 | Decision of registration |
Patent event code: PE07011S01D Comment text: Decision to Grant Registration Patent event date: 19960327 |
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GRNT | Written decision to grant | ||
PR0701 | Registration of establishment |
Comment text: Registration of Establishment Patent event date: 19960403 Patent event code: PR07011E01D |
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