CN114672718B - 高牌号硅钢的冶炼方法 - Google Patents
高牌号硅钢的冶炼方法 Download PDFInfo
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- CN114672718B CN114672718B CN202210389307.XA CN202210389307A CN114672718B CN 114672718 B CN114672718 B CN 114672718B CN 202210389307 A CN202210389307 A CN 202210389307A CN 114672718 B CN114672718 B CN 114672718B
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- slag
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- molten steel
- steel
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- 238000003723 Smelting Methods 0.000 title claims abstract description 62
- 238000000034 method Methods 0.000 title claims abstract description 49
- 229910000976 Electrical steel Inorganic materials 0.000 title claims abstract description 29
- 239000002893 slag Substances 0.000 claims abstract description 256
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 209
- 239000010959 steel Substances 0.000 claims abstract description 209
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 204
- 229910052742 iron Inorganic materials 0.000 claims abstract description 105
- 238000005275 alloying Methods 0.000 claims abstract description 81
- 238000005261 decarburization Methods 0.000 claims abstract description 76
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 73
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 50
- 230000023556 desulfurization Effects 0.000 claims abstract description 50
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 48
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 46
- 239000000956 alloy Substances 0.000 claims abstract description 46
- 238000010079 rubber tapping Methods 0.000 claims abstract description 45
- 229910052782 aluminium Inorganic materials 0.000 claims description 107
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 90
- 239000007789 gas Substances 0.000 claims description 62
- 239000002245 particle Substances 0.000 claims description 59
- 229910052751 metal Inorganic materials 0.000 claims description 57
- 239000002184 metal Substances 0.000 claims description 57
- 239000011572 manganese Substances 0.000 claims description 44
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 42
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 42
- 239000004571 lime Substances 0.000 claims description 42
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 36
- 229910052760 oxygen Inorganic materials 0.000 claims description 35
- 238000007598 dipping method Methods 0.000 claims description 34
- 229910052799 carbon Inorganic materials 0.000 claims description 32
- 238000007670 refining Methods 0.000 claims description 31
- 238000007664 blowing Methods 0.000 claims description 30
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 29
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 28
- 229910052748 manganese Inorganic materials 0.000 claims description 28
- 239000001301 oxygen Substances 0.000 claims description 28
- 229910000519 Ferrosilicon Inorganic materials 0.000 claims description 27
- 239000010936 titanium Substances 0.000 claims description 27
- 229910052719 titanium Inorganic materials 0.000 claims description 27
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 claims description 24
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 23
- 229910052786 argon Inorganic materials 0.000 claims description 18
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 17
- 239000000203 mixture Substances 0.000 claims description 17
- 239000000126 substance Substances 0.000 claims description 17
- 239000001257 hydrogen Substances 0.000 claims description 16
- 229910052739 hydrogen Inorganic materials 0.000 claims description 16
- 230000003628 erosive effect Effects 0.000 claims description 14
- 239000011449 brick Substances 0.000 claims description 13
- 239000012535 impurity Substances 0.000 claims description 12
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 11
- CYUOWZRAOZFACA-UHFFFAOYSA-N aluminum iron Chemical compound [Al].[Fe] CYUOWZRAOZFACA-UHFFFAOYSA-N 0.000 claims description 11
- 229910052710 silicon Inorganic materials 0.000 claims description 11
- 239000010703 silicon Substances 0.000 claims description 11
- 239000007921 spray Substances 0.000 claims description 9
- 230000003647 oxidation Effects 0.000 claims description 8
- 238000007254 oxidation reaction Methods 0.000 claims description 8
- 230000000630 rising effect Effects 0.000 claims description 8
- 229910052698 phosphorus Inorganic materials 0.000 claims description 6
- 239000011573 trace mineral Substances 0.000 claims description 6
- 235000013619 trace mineral Nutrition 0.000 claims description 6
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 5
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 2
- 125000004435 hydrogen atom Chemical class [H]* 0.000 claims 2
- 239000011593 sulfur Substances 0.000 abstract description 30
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 abstract description 28
- 230000003749 cleanliness Effects 0.000 abstract description 6
- 238000009749 continuous casting Methods 0.000 description 36
- 238000007792 addition Methods 0.000 description 33
- 239000003795 chemical substances by application Substances 0.000 description 32
- 238000009413 insulation Methods 0.000 description 27
- 230000008569 process Effects 0.000 description 20
- 229910052918 calcium silicate Inorganic materials 0.000 description 15
- 239000000378 calcium silicate Substances 0.000 description 15
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 15
- 238000006243 chemical reaction Methods 0.000 description 14
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 12
- 230000006872 improvement Effects 0.000 description 11
- 238000005086 pumping Methods 0.000 description 9
- 239000000292 calcium oxide Substances 0.000 description 8
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 8
- 150000002431 hydrogen Chemical class 0.000 description 8
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 7
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 6
- 229910052681 coesite Inorganic materials 0.000 description 6
- 229910052906 cristobalite Inorganic materials 0.000 description 6
- CSJDCSCTVDEHRN-UHFFFAOYSA-N methane;molecular oxygen Chemical compound C.O=O CSJDCSCTVDEHRN-UHFFFAOYSA-N 0.000 description 6
- 239000011819 refractory material Substances 0.000 description 6
- 238000005070 sampling Methods 0.000 description 6
- 239000000377 silicon dioxide Substances 0.000 description 6
- 235000012239 silicon dioxide Nutrition 0.000 description 6
- 229910052682 stishovite Inorganic materials 0.000 description 6
- 229910052905 tridymite Inorganic materials 0.000 description 6
- 229910000655 Killed steel Inorganic materials 0.000 description 5
- ARHMMDOXGIIARL-UHFFFAOYSA-N calcium;dihydroxy(dioxido)silane Chemical compound [Ca+2].O[Si](O)([O-])[O-] ARHMMDOXGIIARL-UHFFFAOYSA-N 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 4
- 230000001174 ascending effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000007667 floating Methods 0.000 description 4
- 238000007654 immersion Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 230000001590 oxidative effect Effects 0.000 description 3
- 238000001179 sorption measurement Methods 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 238000005303 weighing Methods 0.000 description 3
- RQMIWLMVTCKXAQ-UHFFFAOYSA-N [AlH3].[C] Chemical compound [AlH3].[C] RQMIWLMVTCKXAQ-UHFFFAOYSA-N 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000010409 ironing Methods 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 230000035484 reaction time Effects 0.000 description 2
- 206010039897 Sedation Diseases 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000005262 decarbonization Methods 0.000 description 1
- 238000006356 dehydrogenation reaction Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 1
- 235000013980 iron oxide Nutrition 0.000 description 1
- VBMVTYDPPZVILR-UHFFFAOYSA-N iron(2+);oxygen(2-) Chemical class [O-2].[Fe+2] VBMVTYDPPZVILR-UHFFFAOYSA-N 0.000 description 1
- 230000009916 joint effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000036280 sedation Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000009865 steel metallurgy Methods 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
- C22C33/06—Making ferrous alloys by melting using master alloys
-
- 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
- C21C1/00—Refining of pig-iron; Cast iron
- C21C1/02—Dephosphorising or desulfurising
-
- 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
- C21C5/28—Manufacture of steel in the converter
-
- 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
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/06—Deoxidising, e.g. killing
-
- 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
- C21C7/064—Dephosphorising; Desulfurising
-
- 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
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/004—Very low carbon steels, i.e. having a carbon content of less than 0,01%
-
- 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
-
- 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
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
Description
Claims (10)
Priority Applications (1)
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CN202210389307.XA CN114672718B (zh) | 2022-04-13 | 2022-04-13 | 高牌号硅钢的冶炼方法 |
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CN202210389307.XA CN114672718B (zh) | 2022-04-13 | 2022-04-13 | 高牌号硅钢的冶炼方法 |
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CN114672718A CN114672718A (zh) | 2022-06-28 |
CN114672718B true CN114672718B (zh) | 2023-07-07 |
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Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN115747621B (zh) * | 2022-10-31 | 2024-03-19 | 马鞍山钢铁股份有限公司 | 一种高铝或高硅电工钢的超低钛冶炼方法 |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH11229096A (ja) * | 1998-02-16 | 1999-08-24 | Sumitomo Metal Ind Ltd | 無方向性電磁鋼板およびその製造方法 |
CN1864879A (zh) * | 2006-06-06 | 2006-11-22 | 湖南华菱涟源钢铁有限公司 | 一种薄板坯连铸连轧流程生产半工艺冷轧硅钢的方法 |
WO2009152643A1 (zh) * | 2008-06-19 | 2009-12-23 | 鞍钢股份有限公司 | 用于炉外精炼脱磷、脱硫、去除细小杂物的添加剂及其制法和应用 |
CN102002553A (zh) * | 2010-12-01 | 2011-04-06 | 山西太钢不锈钢股份有限公司 | 一种中低牌号冷轧无取向硅钢钢水的脱硫方法 |
CN103276151A (zh) * | 2013-06-06 | 2013-09-04 | 鞍钢股份有限公司 | 一种低硅钢采用硅合金脱氧的方法 |
CN105238906A (zh) * | 2014-07-11 | 2016-01-13 | 鞍钢股份有限公司 | 一种低碳低硅钢冶炼控制方法 |
CN105441638A (zh) * | 2015-12-02 | 2016-03-30 | 武汉钢铁(集团)公司 | 在rh炉进行合金化的取向硅钢的冶炼方法 |
WO2022062692A1 (zh) * | 2020-09-27 | 2022-03-31 | 江苏省沙钢钢铁研究院有限公司 | 无取向硅钢的生产方法以及无取向硅钢 |
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CN100567545C (zh) * | 2007-06-25 | 2009-12-09 | 宝山钢铁股份有限公司 | 一种高牌号无取向硅钢及其制造方法 |
CN101139681B (zh) * | 2007-10-26 | 2010-07-21 | 山西太钢不锈钢股份有限公司 | 中高牌号冷轧无取向硅钢及其制造方法 |
CN102719593B (zh) * | 2011-03-29 | 2014-04-02 | 鞍钢股份有限公司 | 一种冶炼超低碳钢的方法 |
CN103627853B (zh) * | 2013-12-05 | 2015-12-02 | 广东韶钢松山股份有限公司 | 一种低碳低硅钢制造方法 |
CN112921148B (zh) * | 2021-01-21 | 2022-04-19 | 江苏省沙钢钢铁研究院有限公司 | 一种超低硫硅钢冶炼工艺方法 |
CN112899552B (zh) * | 2021-01-21 | 2022-03-29 | 江苏省沙钢钢铁研究院有限公司 | 一种超低铝无取向硅钢夹杂物控制方法 |
CN114107640B (zh) * | 2021-11-29 | 2023-10-24 | 广东中晟电磁科技股份有限公司 | 一种新能源汽车驱动电机用35wd1600电工钢及其生产方法 |
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2022
- 2022-04-13 CN CN202210389307.XA patent/CN114672718B/zh active Active
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH11229096A (ja) * | 1998-02-16 | 1999-08-24 | Sumitomo Metal Ind Ltd | 無方向性電磁鋼板およびその製造方法 |
CN1864879A (zh) * | 2006-06-06 | 2006-11-22 | 湖南华菱涟源钢铁有限公司 | 一种薄板坯连铸连轧流程生产半工艺冷轧硅钢的方法 |
WO2009152643A1 (zh) * | 2008-06-19 | 2009-12-23 | 鞍钢股份有限公司 | 用于炉外精炼脱磷、脱硫、去除细小杂物的添加剂及其制法和应用 |
CN102002553A (zh) * | 2010-12-01 | 2011-04-06 | 山西太钢不锈钢股份有限公司 | 一种中低牌号冷轧无取向硅钢钢水的脱硫方法 |
CN103276151A (zh) * | 2013-06-06 | 2013-09-04 | 鞍钢股份有限公司 | 一种低硅钢采用硅合金脱氧的方法 |
CN105238906A (zh) * | 2014-07-11 | 2016-01-13 | 鞍钢股份有限公司 | 一种低碳低硅钢冶炼控制方法 |
CN105441638A (zh) * | 2015-12-02 | 2016-03-30 | 武汉钢铁(集团)公司 | 在rh炉进行合金化的取向硅钢的冶炼方法 |
WO2022062692A1 (zh) * | 2020-09-27 | 2022-03-31 | 江苏省沙钢钢铁研究院有限公司 | 无取向硅钢的生产方法以及无取向硅钢 |
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