EP1194597A1 - Verfahren zur rückgewinnung von metallischem chrom aus chromoxid enthaltenden schlacken - Google Patents
Verfahren zur rückgewinnung von metallischem chrom aus chromoxid enthaltenden schlackenInfo
- Publication number
- EP1194597A1 EP1194597A1 EP00952861A EP00952861A EP1194597A1 EP 1194597 A1 EP1194597 A1 EP 1194597A1 EP 00952861 A EP00952861 A EP 00952861A EP 00952861 A EP00952861 A EP 00952861A EP 1194597 A1 EP1194597 A1 EP 1194597A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- slag
- chromium
- chromium oxide
- silicon
- carbon
- 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.)
- Ceased
Links
- 238000000034 method Methods 0.000 title claims abstract description 24
- 239000002893 slag Substances 0.000 title claims abstract description 23
- 239000011651 chromium Substances 0.000 title claims abstract description 22
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 title claims abstract description 14
- 229910052804 chromium Inorganic materials 0.000 title claims abstract description 13
- 229910000423 chromium oxide Inorganic materials 0.000 title claims abstract description 13
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 title claims abstract description 12
- 230000008569 process Effects 0.000 claims abstract description 20
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 11
- 239000010703 silicon Substances 0.000 claims abstract description 10
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 10
- 238000011282 treatment Methods 0.000 claims abstract description 7
- 239000000428 dust Substances 0.000 claims abstract description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 4
- 239000010935 stainless steel Substances 0.000 claims abstract description 3
- 238000007664 blowing Methods 0.000 claims description 4
- 238000011084 recovery Methods 0.000 claims description 4
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 238000005422 blasting Methods 0.000 abstract 1
- 238000009434 installation Methods 0.000 abstract 1
- 238000010309 melting process Methods 0.000 abstract 1
- 238000006722 reduction reaction Methods 0.000 description 10
- 230000009467 reduction Effects 0.000 description 9
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 6
- 238000005261 decarburization Methods 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 239000000155 melt Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910005347 FeSi Inorganic materials 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000010494 dissociation reaction Methods 0.000 description 1
- 230000005593 dissociations Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- DALUDRGQOYMVLD-UHFFFAOYSA-N iron manganese Chemical compound [Mn].[Fe] DALUDRGQOYMVLD-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229910052566 spinel group Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 230000035899 viability Effects 0.000 description 1
Classifications
-
- 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
- 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
- C21C5/52—Manufacture of steel in electric furnaces
- C21C5/5252—Manufacture of steel in electric furnaces in an electrically heated multi-chamber furnace, a combination of electric furnaces or an electric furnace arranged for associated working with a non 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
- C21C5/5264—Manufacture of alloyed steels including ferro-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
- 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
- C21C7/0685—Decarburising of stainless steel
-
- 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
- C22B5/00—General methods of reducing to metals
- C22B5/02—Dry methods smelting of sulfides or formation of mattes
- C22B5/04—Dry methods smelting of sulfides or formation of mattes by aluminium, other metals or silicon
-
- 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
- C21C2005/5258—Manufacture of steel in electric furnaces with crater formed by down-melting of scrap or charge through electrode or lance
-
- 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
- F27D3/00—Charging; Discharging; Manipulation of charge
- F27D3/16—Introducing a fluid jet or current into the charge
- F27D2003/168—Introducing a fluid jet or current into the charge through a lance
-
- 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
Definitions
- the invention relates to a process for the recovery of metallic chromium from slags containing chromium oxide.
- Vacuum processes such as VOD, SS-VOD, RH, RH with lance, the basic reaction of decarburization is carried out in a multi-material system, whereby the reduction of chromium oxide with carbon is the basic mechanism.
- the carbon dissolved in the melt reduces it on the blister surface and in the so-called focal spot.
- the product of the reduction, the metallic chromium, is returned to the melt and the carbon monoxide, after diffusion into the bubbles, is removed into the gas atmosphere above the melt.
- the slag is usually reduced with high-affinity silicon in the form of FeSi at the end of decarburization and the oxygen blowing process.
- the invention is based on the object of offering a simpler and therefore more economical method for this purpose.
- This object is achieved by tapping or removing the slag which is produced at the end of a blowing or treatment process in a converter or a vacuum system,
- the chromium oxide contained in the added slag is reduced directly to metallic chromium by the carbon and silicon
- the conventional treatment step of slag reduction is omitted.
- the high-chromium oxide and manganese-iron oxide-saturated slag which is present, for example, after an oxygen blowing process, is removed from the metal unreduced, i.e. tapped or withdrawn from the pan and charged into the upstream electric oven.
- the slag is reduced directly with a carbon additive and silicon from the scrap usually charged in the electric furnace, possibly with residual dust.
- the chromium oxide is reduced in the electric furnace instead of in one of the downstream systems and the metallic chromium is recovered in this way.
- the reflux of the slag into the electric furnace can take place directly after each treatment or as a cumulative amount of different treatments. Depending on the overall technology, this process can be designed to be cost and energy optimal. It is irrelevant for the process whether the slag is in a solid, liquid or in an intermediate state. This only has an influence on the melting time in the electric furnace.
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)
- Carbon Steel Or Casting Steel Manufacturing (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 And Refinement Of Metals (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19929551 | 1999-06-23 | ||
| DE19929551 | 1999-06-25 | ||
| PCT/DE2000/002030 WO2000079014A1 (de) | 1999-06-23 | 2000-06-23 | Verfahren zur rückgewinnung von metallischem chrom aus chromoxid enthaltenden schlacken |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP1194597A1 true EP1194597A1 (de) | 2002-04-10 |
Family
ID=7912806
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP00952861A Ceased EP1194597A1 (de) | 1999-06-23 | 2000-06-23 | Verfahren zur rückgewinnung von metallischem chrom aus chromoxid enthaltenden schlacken |
Country Status (13)
| Country | Link |
|---|---|
| US (1) | US6679931B1 (ru) |
| EP (1) | EP1194597A1 (ru) |
| JP (2) | JP2003502504A (ru) |
| KR (1) | KR20020014821A (ru) |
| CN (1) | CN1217017C (ru) |
| AU (1) | AU6554700A (ru) |
| BR (1) | BR0011949A (ru) |
| CZ (1) | CZ303288B6 (ru) |
| MX (1) | MXPA01012898A (ru) |
| PL (1) | PL352472A1 (ru) |
| RU (1) | RU2247161C2 (ru) |
| WO (1) | WO2000079014A1 (ru) |
| ZA (1) | ZA200200517B (ru) |
Families Citing this family (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1252347B1 (de) * | 2000-01-28 | 2003-08-27 | Holcim Ltd. | Verfahren zum entchromen und/oder entnickeln von flüssigen schlacken |
| CZ299403B6 (cs) * | 2000-10-18 | 2008-07-16 | Sms Demag Ag | Zpusob výroby nerezavejících ocelí, predevším ušlechtilých ocelí s obsahem chrómu a s obsahem chrómu a niklu |
| 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 |
| DE10323507A1 (de) * | 2003-05-24 | 2004-12-09 | Sms Demag Ag | Verfahren zur Rückgewinnung von metallischen Elementen, insbesondere metallischem Chrom, aus metalloxidhaltigen Schlacken im Elektrolichtbogenofen |
| DE10335847A1 (de) * | 2003-07-31 | 2005-02-17 | Sms Demag Ag | Elektroreduktionsofen |
| DE10350959A1 (de) * | 2003-10-30 | 2005-05-25 | Sms Demag Ag | Verfahren zur Rückgewinnung von metallischen Elementen aus metalloxidhaltigen Schlacken |
| CA2563338A1 (en) * | 2004-05-18 | 2005-12-01 | Holcim Ltd. | Method for reducing cr from cr-containing metallurgical slags |
| 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 |
| CN103031405B (zh) * | 2011-11-29 | 2015-03-18 | 新疆八一钢铁股份有限公司 | 电炉热兑转炉液态钢渣的炼钢工艺 |
| CN102864311B (zh) * | 2012-09-21 | 2014-11-26 | 承德建龙特殊钢有限公司 | 一种高铬渣中铬在炼钢-lf工序的回收方法 |
| CN103031401B (zh) * | 2012-09-26 | 2014-04-30 | 新疆八一钢铁股份有限公司 | 一种lf精炼炉还原渣用于转炉炼钢的方法 |
| CN103924089A (zh) * | 2014-04-25 | 2014-07-16 | 北京科技大学 | 一种熔融处理不锈钢粉尘、炉渣及含Cr污泥的方法 |
| JP6451462B2 (ja) * | 2015-04-01 | 2019-01-16 | 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 |
| CN104789736B (zh) * | 2015-05-18 | 2017-01-11 | 安徽富凯特材有限公司 | 一种降低电弧炉渣中铬元素的方法 |
| CN105568004B (zh) * | 2016-03-03 | 2017-06-16 | 锦州集信高温材料有限公司 | 一种在电弧炉中铝铬渣冶炼金属铬的方法 |
| KR101835708B1 (ko) | 2016-07-26 | 2018-03-07 | 주식회사 심팩 메탈 | 용융환원 전기로(saf)를 이용한 스테인리스 제강 전로 슬래그 중 유가금속 회수방법 |
| CN107267850B (zh) * | 2017-06-07 | 2019-02-01 | 北京科技大学 | 一种回收熔炼炉渣中铬元素的不锈钢冶炼方法 |
| US20230304110A1 (en) | 2020-09-10 | 2023-09-28 | Jfe Steel Corporation | Method for producing chromium-containing molten steel |
| CN115141907A (zh) * | 2022-03-08 | 2022-10-04 | 重庆钢铁股份有限公司 | 转炉低铁钢比冶炼防止氧枪喷头烧漏的方法 |
Family Cites Families (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3012875A (en) * | 1959-12-04 | 1961-12-12 | Strategic Udy Metallurgical & Chemical Processes Ltd | Metallurgical process |
| FR2172206B1 (ru) * | 1972-02-15 | 1978-09-29 | Graenges Ab | |
| JPS5713606B2 (ru) * | 1973-04-05 | 1982-03-18 | ||
| JPS5324001B2 (ru) * | 1973-10-02 | 1978-07-18 | ||
| JPS5653605B2 (ru) * | 1974-09-04 | 1981-12-19 | ||
| JPS54122615A (en) * | 1978-03-16 | 1979-09-22 | Showa Denko Kk | Reducing method for chromium oxide-containing slag |
| JPS54158313A (en) * | 1978-06-03 | 1979-12-14 | Nippon Steel Corp | Chromium removing method for chromium-containing slag |
| JPS5931816A (ja) * | 1982-08-12 | 1984-02-21 | Nippon Steel Corp | 粗溶鋼の製造方法 |
| JP2632676B2 (ja) * | 1986-12-02 | 1997-07-23 | 日新製鋼株式会社 | ステンレス鋼精錬におけるクロムの回収法 |
| JPH0310030A (ja) * | 1989-06-08 | 1991-01-17 | Nisshin Steel Co Ltd | ステンレス鋼製造過程副産物の処理炉 |
| JPH03107430A (ja) * | 1989-09-22 | 1991-05-07 | Nisshin Steel Co Ltd | ステンレス鋼製造過程副産物の処理炉および処理方法 |
| JPH05247522A (ja) * | 1992-03-05 | 1993-09-24 | Kawasaki Steel Corp | 高清浄度ステンレス鋼の溶製方法 |
| RU2082785C1 (ru) * | 1993-04-06 | 1997-06-27 | Акционерное общество открытого типа "Челябинский электрометаллургический комбинат" | Способ извлечения металла из шлака производства передельного ферросиликохрома |
| AT403293B (de) * | 1995-01-16 | 1997-12-29 | Kct Tech Gmbh | Verfahren und anlage zum herstellen von legierten stählen |
| ZA963234B (en) * | 1995-05-02 | 1996-07-29 | Holderbank Financ Glarus | Process for the production of hydraulic binders and/or alloys such as e g ferrochromium of ferrovanadium |
| JP3769860B2 (ja) * | 1997-02-04 | 2006-04-26 | Ｊｆｅスチール株式会社 | ステンレス鋼の精錬方法 |
-
2000
- 2000-06-23 CZ CZ20014667A patent/CZ303288B6/cs not_active IP Right Cessation
- 2000-06-23 CN CN008092931A patent/CN1217017C/zh not_active Expired - Lifetime
- 2000-06-23 AU AU65547/00A patent/AU6554700A/en not_active Abandoned
- 2000-06-23 US US10/019,207 patent/US6679931B1/en not_active Expired - Lifetime
- 2000-06-23 KR KR1020017016491A patent/KR20020014821A/ko active Search and Examination
- 2000-06-23 MX MXPA01012898A patent/MXPA01012898A/es unknown
- 2000-06-23 PL PL35247200A patent/PL352472A1/xx not_active Application Discontinuation
- 2000-06-23 JP JP2001505357A patent/JP2003502504A/ja not_active Withdrawn
- 2000-06-23 WO PCT/DE2000/002030 patent/WO2000079014A1/de not_active Application Discontinuation
- 2000-06-23 RU RU2002101484A patent/RU2247161C2/ru active
- 2000-06-23 BR BR0011949A patent/BR0011949A/pt not_active Application Discontinuation
- 2000-06-23 EP EP00952861A patent/EP1194597A1/de not_active Ceased
-
2002
- 2002-01-21 ZA ZA200200517A patent/ZA200200517B/en unknown
-
2012
- 2012-11-27 JP JP2012258618A patent/JP2013079449A/ja active Pending
Non-Patent Citations (1)
| Title |
|---|
| See references of WO0079014A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CZ20014667A3 (cs) | 2002-05-15 |
| CN1357055A (zh) | 2002-07-03 |
| PL352472A1 (en) | 2003-08-25 |
| AU6554700A (en) | 2001-01-09 |
| CN1217017C (zh) | 2005-08-31 |
| CZ303288B6 (cs) | 2012-07-18 |
| MXPA01012898A (es) | 2002-07-30 |
| US6679931B1 (en) | 2004-01-20 |
| JP2013079449A (ja) | 2013-05-02 |
| ZA200200517B (en) | 2003-06-25 |
| JP2003502504A (ja) | 2003-01-21 |
| KR20020014821A (ko) | 2002-02-25 |
| BR0011949A (pt) | 2002-03-26 |
| WO2000079014A1 (de) | 2000-12-28 |
| RU2247161C2 (ru) | 2005-02-27 |
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