BR112021021108A8 - Método para produzir ferro fundido contendo cromo - Google Patents
Método para produzir ferro fundido contendo cromoInfo
- Publication number
- BR112021021108A8 BR112021021108A8 BR112021021108A BR112021021108A BR112021021108A8 BR 112021021108 A8 BR112021021108 A8 BR 112021021108A8 BR 112021021108 A BR112021021108 A BR 112021021108A BR 112021021108 A BR112021021108 A BR 112021021108A BR 112021021108 A8 BR112021021108 A8 BR 112021021108A8
- Authority
- BR
- Brazil
- Prior art keywords
- darc
- pcd
- cast iron
- electric furnace
- molten
- Prior art date
Links
- 239000011651 chromium Substances 0.000 title abstract 4
- 229910001018 Cast iron Inorganic materials 0.000 title abstract 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 title abstract 2
- 229910052804 chromium Inorganic materials 0.000 title abstract 2
- 238000004519 manufacturing process Methods 0.000 title abstract 2
- 239000002893 slag Substances 0.000 abstract 3
- 239000000463 material Substances 0.000 abstract 2
- 229910052751 metal Inorganic materials 0.000 abstract 2
- 239000002184 metal Substances 0.000 abstract 2
- 239000002994 raw material Substances 0.000 abstract 2
- 229910000604 Ferrochrome Inorganic materials 0.000 abstract 1
- 229910000519 Ferrosilicon Inorganic materials 0.000 abstract 1
- 239000000945 filler Substances 0.000 abstract 1
- 239000012768 molten material Substances 0.000 abstract 1
- 230000003647 oxidation Effects 0.000 abstract 1
- 238000007254 oxidation reaction Methods 0.000 abstract 1
- 238000007670 refining Methods 0.000 abstract 1
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
- 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
- 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
- C21C5/5211—Manufacture of steel in electric furnaces in an alternating current [AC] electric arc furnace
- C21C5/5217—Manufacture of steel in electric furnaces in an alternating current [AC] electric arc furnace equipped with burners or devices for injecting gas, i.e. oxygen, or pulverulent materials into the furnace
-
- 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
- C21C5/005—Manufacture of stainless steel
-
- 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
- C21C5/42—Constructional features of converters
- C21C5/46—Details or accessories
- C21C5/4673—Measuring and sampling devices
-
- 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
- C21C5/527—Charging of the electric furnace
-
- 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
- C21C7/0025—Adding carbon material
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B34/00—Obtaining refractory metals
- C22B34/30—Obtaining chromium, molybdenum or tungsten
- C22B34/32—Obtaining chromium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/04—Working-up slag
-
- 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
-
- 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)
- Mechanical Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Manufacture Of Iron (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
método para produzir ferro fundido contendo cromo. na presente invenção, um forno elétrico ca equipado com três eletrodos é carregado com material de carga contendo uma matéria-prima metálica e uma escória não reduzida, a matéria-prima metálica contendo pelo menos um dentre um ferrossilício e um ferrocromo que contém si metálico e a escória não reduzida contendo um óxido de cr produzido por refino por oxidação. o material de carga é misturado de modo que uma razão de massa definida como a quantidade de si metálico dividida pela quantidade de óxido de cr seja 0,30-0,40 e a concentração de c seja maior ou igual a 2,0% em massa e menor ou igual a uma concentração de saturação. o ferro fundido contendo cr é fabricado operando o forno elétrico em condições tais que as relações sejam satisfeitas, onde pcd (m) é o diâmetro de um círculo que passa pelos centros dos três eletrodos quando visto em uma vista plana ao longo de uma direção do eixo geométrico central do forno elétrico, he (m) é a altura de eletrodo média definida como a distância vertical das pontas dos eletrodos até a superfície do metal fundido, df (m) é o diâmetro interno do forno, hs (m) é a espessura de escória fundida, darc (m) é o diâmetro de espalhamento do arco na superfície do material fundido, e o (graus) é o ângulo de deflexão do arco: darc = pcd + 2he × tanteta; teta = 52,5 - 75 × (pcd/df); 0,22 = darc/df = 0,30; 0,35 = he/hs = 1,50.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2019081179 | 2019-04-22 | ||
| PCT/JP2020/014962 WO2020217890A1 (ja) | 2019-04-22 | 2020-03-31 | 含クロム溶鉄の製造方法 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| BR112021021108A8 true BR112021021108A8 (pt) | 2021-12-14 |
| BR112021021108A2 BR112021021108A2 (pt) | 2023-02-23 |
Family
ID=72941896
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BR112021021108A BR112021021108A2 (pt) | 2019-04-22 | 2020-03-31 | Método para produzir ferro fundido contendo cromo |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US20220195546A1 (pt) |
| EP (1) | EP3960880B1 (pt) |
| JP (1) | JP7028366B2 (pt) |
| KR (1) | KR102522360B1 (pt) |
| CN (1) | CN113710819B (pt) |
| BR (1) | BR112021021108A2 (pt) |
| ES (1) | ES2961323T3 (pt) |
| TW (1) | TW202039867A (pt) |
| WO (1) | WO2020217890A1 (pt) |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4198229A (en) * | 1976-06-28 | 1980-04-15 | Nippon Steel Corporation | Method of dephosphorization of metal or alloy |
| US4565574A (en) * | 1984-11-19 | 1986-01-21 | Nippon Steel Corporation | Process for production of high-chromium alloy by smelting reduction |
| JP3462660B2 (ja) * | 1996-03-22 | 2003-11-05 | 日新製鋼株式会社 | 電気アーク炉スラグの粉化防止方法 |
| JP3721154B2 (ja) * | 2002-10-18 | 2005-11-30 | 新日本製鐵株式会社 | クロム含有溶湯の精錬方法 |
| AT412283B (de) * | 2003-05-16 | 2004-12-27 | Voest Alpine Ind Anlagen | Verfahren zum verwerten von schlacke |
| KR100793591B1 (ko) * | 2006-12-28 | 2008-01-14 | 주식회사 포스코 | 산화크롬 함유 슬래그로부터의 크롬 금속 환원 방법 |
| JP5326475B2 (ja) * | 2008-10-07 | 2013-10-30 | 新日鐵住金株式会社 | クロム含有スラグからのクロム回収方法 |
| JP5458631B2 (ja) | 2009-04-01 | 2014-04-02 | 新日鐵住金株式会社 | 溶融金属の回収方法 |
| CN104164531A (zh) * | 2013-09-11 | 2014-11-26 | 襄阳康捷飞龙电气有限公司 | 一种采用转炉吹气冶炼和净化生产铸铁的方法 |
| CN103525963B (zh) * | 2013-10-25 | 2015-07-15 | 中冶东方工程技术有限公司 | 一种有氧冶炼矿热炉及其有氧冶炼方法 |
| JP6476971B2 (ja) | 2015-02-17 | 2019-03-06 | 新日鐵住金株式会社 | アーク式底吹き電気炉の操業方法 |
| JP6458531B2 (ja) * | 2015-02-17 | 2019-01-30 | 新日鐵住金株式会社 | アーク式底吹き電気炉における撹拌方法 |
| JP6620781B2 (ja) | 2017-05-15 | 2019-12-18 | Ｊｆｅスチール株式会社 | ダストの溶融還元方法及び再利用方法 |
| JP6750595B2 (ja) | 2017-10-27 | 2020-09-02 | Ｊｆｅスチール株式会社 | 重ね隅肉溶接継手の加工方法および重ね隅肉溶接継手の製造方法 |
-
2020
- 2020-03-31 BR BR112021021108A patent/BR112021021108A2/pt unknown
- 2020-03-31 US US17/603,593 patent/US20220195546A1/en active Pending
- 2020-03-31 ES ES20796188T patent/ES2961323T3/es active Active
- 2020-03-31 CN CN202080030007.1A patent/CN113710819B/zh active Active
- 2020-03-31 JP JP2021515928A patent/JP7028366B2/ja active Active
- 2020-03-31 EP EP20796188.9A patent/EP3960880B1/en active Active
- 2020-03-31 WO PCT/JP2020/014962 patent/WO2020217890A1/ja unknown
- 2020-03-31 KR KR1020217037516A patent/KR102522360B1/ko active IP Right Grant
- 2020-03-31 TW TW109111028A patent/TW202039867A/zh unknown
Also Published As
| Publication number | Publication date |
|---|---|
| EP3960880A4 (en) | 2022-06-22 |
| CN113710819B (zh) | 2022-08-16 |
| JP7028366B2 (ja) | 2022-03-02 |
| CN113710819A (zh) | 2021-11-26 |
| KR20210151968A (ko) | 2021-12-14 |
| TW202039867A (zh) | 2020-11-01 |
| WO2020217890A1 (ja) | 2020-10-29 |
| US20220195546A1 (en) | 2022-06-23 |
| KR102522360B1 (ko) | 2023-04-18 |
| JPWO2020217890A1 (ja) | 2021-12-16 |
| EP3960880C0 (en) | 2023-08-30 |
| EP3960880B1 (en) | 2023-08-30 |
| ES2961323T3 (es) | 2024-03-11 |
| BR112021021108A2 (pt) | 2023-02-23 |
| EP3960880A1 (en) | 2022-03-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| B06W | Patent application suspended after preliminary examination (for patents with searches from other patent authorities) chapter 6.23 patent gazette] |