JP2011208207A - 含クロム溶銑およびスラグの処理方法 - Google Patents
含クロム溶銑およびスラグの処理方法 Download PDFInfo
- Publication number
- JP2011208207A JP2011208207A JP2010076300A JP2010076300A JP2011208207A JP 2011208207 A JP2011208207 A JP 2011208207A JP 2010076300 A JP2010076300 A JP 2010076300A JP 2010076300 A JP2010076300 A JP 2010076300A JP 2011208207 A JP2011208207 A JP 2011208207A
- Authority
- JP
- Japan
- Prior art keywords
- slag
- stirring
- chromium
- hot metal
- electric furnace
- 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
- 239000002893 slag Substances 0.000 title claims abstract description 79
- 239000011651 chromium Substances 0.000 title claims abstract description 57
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 title claims abstract description 49
- 229910052804 chromium Inorganic materials 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims description 20
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title abstract description 18
- 229910052742 iron Inorganic materials 0.000 title abstract description 9
- 238000003756 stirring Methods 0.000 claims abstract description 57
- 229910052751 metal Inorganic materials 0.000 claims description 79
- 239000002184 metal Substances 0.000 claims description 79
- 229910004261 CaF 2 Inorganic materials 0.000 claims description 18
- 229910052782 aluminium Inorganic materials 0.000 claims description 12
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 11
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical group [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 10
- 238000002844 melting Methods 0.000 claims description 7
- 230000008018 melting Effects 0.000 claims description 7
- 239000000126 substance Substances 0.000 claims description 6
- 238000003723 Smelting Methods 0.000 claims description 5
- 238000006477 desulfuration reaction Methods 0.000 abstract description 19
- 230000023556 desulfurization Effects 0.000 abstract description 19
- 238000007670 refining Methods 0.000 abstract description 17
- 239000000463 material Substances 0.000 abstract description 10
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 230000001737 promoting effect Effects 0.000 abstract description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 15
- 229910000831 Steel Inorganic materials 0.000 description 14
- 239000010935 stainless steel Substances 0.000 description 14
- 239000010959 steel Substances 0.000 description 14
- 238000006722 reduction reaction Methods 0.000 description 12
- 239000011162 core material Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 8
- 238000010907 mechanical stirring Methods 0.000 description 8
- 239000002436 steel type Substances 0.000 description 7
- 238000011084 recovery Methods 0.000 description 6
- 230000007423 decrease Effects 0.000 description 4
- 238000013019 agitation Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000003638 chemical reducing agent Substances 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000002203 pretreatment Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000009628 steelmaking Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 229910000760 Hardened steel Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical group [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000009533 lab test Methods 0.000 description 1
- 229910000734 martensite Inorganic materials 0.000 description 1
- 238000001465 metallisation Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Images
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
- C21C1/00—Refining of pig-iron; Cast iron
- C21C1/02—Dephosphorising or desulfurising
- C21C1/025—Agents used for 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
- C21C5/52—Manufacture of steel in electric furnaces
- C21C5/54—Processes yielding slags of special composition
-
- 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
- C21C7/076—Use of slags or fluxes as treating agents
-
- 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
- C21C5/52—Manufacture of steel in electric furnaces
- C21C5/5264—Manufacture of alloyed steels including ferro-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
- F27D27/00—Stirring devices for molten material
-
- 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
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
- Treatment Of Steel In Its Molten State (AREA)
- Manufacture Of Iron (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
【解決手段】電気炉で溶製されたCr含有量8.0〜35.0質量%の含クロム溶銑と、当該溶製時に生成された、Cr2O3、SiO2、CaOを構成成分とし塩基度CaO/SiO2が0.7〜1.7であるCaF2フリーの電気炉スラグとを、精錬容器内で撹拌羽根により機械撹拌するに際し、撹拌終了までに、金属Al含有物質およびCaOを投入して撹拌終了後のスラグ塩基度を1.9以上に調整する。
【選択図】図4
Description
3[Si]+2(Cr2O3)=3(SiO2)+4[Cr] …(1)
2Al+(Cr2O3)=(Al2O3)+2[Cr] …(2)
しかし、CaF2フリーのスラグではスラグの融点が上昇し、流動性が低下するため電気炉工程で(2)式の反応を十分に進行させることは難しく、あまり有効な対策とはならないのが現状である。
図1に、機械撹拌を行っている精錬容器中の各部の構成を模式的に例示する。回転軸41を含む断面を示しているが、回転体20については側面図を示してある。
(CaO)+[S]=(CaS)+[O] …(3)
生じた酸素は溶銑中のSiやAlと酸化物を形成してスラグ成分となる。
○; CaO添加量2.7kg/Ton、金属Al無添加
●; CaO添加量6.5kg/Ton、金属Al添加量0.14kg/Ton
■; CaO添加量13.0kg/Ton、金属Al添加量:0.14kg/Ton
金属Alを添加した場合(●および■プロット)には、いずれのチャージにおいても機械撹拌によりスラグ中クロムの還元回収が可能であることが確かめられた。
2 撹拌羽根
3 耐火物層
10 軸棒
20 回転体
30 精錬容器
31 含クロム溶銑
32 スラグ
33 内壁面
34 蓋
41 回転軸
Claims (2)
- 電気炉で溶製されたCr含有量が8.0〜35.0質量%である含クロム溶銑と、当該溶製時に生成された、Cr2O3、SiO2、CaOを構成成分とし塩基度CaO/SiO2が0.7〜1.7であるCaF2フリーの電気炉スラグとを、精錬容器内で撹拌羽根により機械撹拌するに際し、撹拌終了までに、金属Al含有物質およびCaOを投入して撹拌終了後のスラグ塩基度を1.9以上に調整する、含クロム溶銑およびスラグの処理方法。
- 金属Al含有物質は、金属Alを20〜80質量%含有するアルミニウムドロスである請求項1に記載の含クロム溶銑およびスラグの処理方法。
Priority Applications (9)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2010076300A JP5436302B2 (ja) | 2010-03-29 | 2010-03-29 | 含クロム溶銑およびスラグの処理方法 |
MYPI2012003944A MY160584A (en) | 2010-03-29 | 2010-12-08 | Method for treatment of chrome-containing molten iron and slag |
US13/583,844 US8753419B2 (en) | 2010-03-29 | 2010-12-08 | Method for treatment of chrome-containing molten iron and slag |
KR1020127027823A KR101612697B1 (ko) | 2010-03-29 | 2010-12-08 | 크롬 함유 용선 및 슬래그의 처리 방법 |
EP10849026.9A EP2554684B1 (en) | 2010-03-29 | 2010-12-08 | Method for treatment of chromium-containing hot metal and slag |
ES10849026.9T ES2679820T3 (es) | 2010-03-29 | 2010-12-08 | Procedimiento para el tratamiento de escoria y arrabio que contienen cromo |
PCT/JP2010/072052 WO2011121856A1 (ja) | 2010-03-29 | 2010-12-08 | 含クロム溶銑およびスラグの処理方法 |
CN201080065802.0A CN102892906B (zh) | 2010-03-29 | 2010-12-08 | 含铬铁水及熔渣的处理方法 |
TW100100265A TWI487799B (zh) | 2010-03-29 | 2011-01-05 | 含鉻熔化生鐵及爐渣之處理方法 |
Applications Claiming Priority (1)
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JP2010076300A JP5436302B2 (ja) | 2010-03-29 | 2010-03-29 | 含クロム溶銑およびスラグの処理方法 |
Publications (2)
Publication Number | Publication Date |
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JP2011208207A true JP2011208207A (ja) | 2011-10-20 |
JP5436302B2 JP5436302B2 (ja) | 2014-03-05 |
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Family Applications (1)
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JP2010076300A Active JP5436302B2 (ja) | 2010-03-29 | 2010-03-29 | 含クロム溶銑およびスラグの処理方法 |
Country Status (9)
Country | Link |
---|---|
US (1) | US8753419B2 (ja) |
EP (1) | EP2554684B1 (ja) |
JP (1) | JP5436302B2 (ja) |
KR (1) | KR101612697B1 (ja) |
CN (1) | CN102892906B (ja) |
ES (1) | ES2679820T3 (ja) |
MY (1) | MY160584A (ja) |
TW (1) | TWI487799B (ja) |
WO (1) | WO2011121856A1 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102809561A (zh) * | 2012-08-17 | 2012-12-05 | 山西太钢不锈钢股份有限公司 | 一种快速确定aod还原效果的方法 |
JP2014062298A (ja) * | 2012-09-21 | 2014-04-10 | Nisshin Steel Co Ltd | 地金回収方法 |
JP2018127654A (ja) * | 2017-02-07 | 2018-08-16 | Jfeスチール株式会社 | 溶銑の脱硫方法 |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2076858B (en) * | 1980-04-08 | 1985-08-21 | Nixon Ivor Gray | Metallurgical processes utilising particular fuels |
CN1059370A (zh) * | 1990-08-31 | 1992-03-11 | 黄石市无机盐厂 | 铬渣解毒、冶炼含铬生铁的方法 |
JP2947063B2 (ja) * | 1994-05-12 | 1999-09-13 | 住友金属工業株式会社 | ステンレス鋼の製造方法 |
JP2000144272A (ja) | 1998-10-30 | 2000-05-26 | Sumitomo Metal Ind Ltd | 含クロム鋼の溶解、精錬時におけるクロム、鉄回収方法 |
JP2001049325A (ja) | 1999-08-12 | 2001-02-20 | Sumitomo Metal Ind Ltd | 含クロム鋼の溶製方法 |
JP4936787B2 (ja) * | 2006-05-12 | 2012-05-23 | 日新製鋼株式会社 | 含Cr溶銑の脱硫精錬剤および脱硫方法 |
JP4714655B2 (ja) | 2006-09-05 | 2011-06-29 | 新日本製鐵株式会社 | 含クロム溶鉄の脱硫方法 |
KR100793591B1 (ko) * | 2006-12-28 | 2008-01-14 | 주식회사 포스코 | 산화크롬 함유 슬래그로부터의 크롬 금속 환원 방법 |
JP4999483B2 (ja) | 2007-02-07 | 2012-08-15 | 日新製鋼株式会社 | ステンレス溶銑の製造方法 |
-
2010
- 2010-03-29 JP JP2010076300A patent/JP5436302B2/ja active Active
- 2010-12-08 US US13/583,844 patent/US8753419B2/en active Active
- 2010-12-08 MY MYPI2012003944A patent/MY160584A/en unknown
- 2010-12-08 CN CN201080065802.0A patent/CN102892906B/zh active Active
- 2010-12-08 KR KR1020127027823A patent/KR101612697B1/ko active IP Right Grant
- 2010-12-08 ES ES10849026.9T patent/ES2679820T3/es active Active
- 2010-12-08 WO PCT/JP2010/072052 patent/WO2011121856A1/ja active Application Filing
- 2010-12-08 EP EP10849026.9A patent/EP2554684B1/en active Active
-
2011
- 2011-01-05 TW TW100100265A patent/TWI487799B/zh active
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102809561A (zh) * | 2012-08-17 | 2012-12-05 | 山西太钢不锈钢股份有限公司 | 一种快速确定aod还原效果的方法 |
JP2014062298A (ja) * | 2012-09-21 | 2014-04-10 | Nisshin Steel Co Ltd | 地金回収方法 |
US9663838B2 (en) | 2012-09-21 | 2017-05-30 | Nisshin Steel Co., Ltd. | Metal recovery method |
JP2018127654A (ja) * | 2017-02-07 | 2018-08-16 | Jfeスチール株式会社 | 溶銑の脱硫方法 |
Also Published As
Publication number | Publication date |
---|---|
KR20130031251A (ko) | 2013-03-28 |
EP2554684A1 (en) | 2013-02-06 |
MY160584A (en) | 2017-03-15 |
EP2554684B1 (en) | 2018-06-20 |
US20130025413A1 (en) | 2013-01-31 |
CN102892906A (zh) | 2013-01-23 |
KR101612697B1 (ko) | 2016-04-15 |
JP5436302B2 (ja) | 2014-03-05 |
TW201139694A (en) | 2011-11-16 |
WO2011121856A1 (ja) | 2011-10-06 |
TWI487799B (zh) | 2015-06-11 |
CN102892906B (zh) | 2015-04-15 |
US8753419B2 (en) | 2014-06-17 |
ES2679820T3 (es) | 2018-08-31 |
EP2554684A4 (en) | 2017-02-08 |
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