EP1194597A1 - Verfahren zur rückgewinnung von metallischem chrom aus chromoxid enthaltenden schlacken - Google Patents

Verfahren zur rückgewinnung von metallischem chrom aus chromoxid enthaltenden schlacken

Info

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
Application number
EP00952861A
Other languages
German (de)
English (en)
French (fr)
Inventor
Karl Reiner GÖTZINGER
Jan Reichel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SMS Siemag AG
Original Assignee
SMS Demag AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by SMS Demag AG filed Critical SMS Demag AG
Publication of EP1194597A1 publication Critical patent/EP1194597A1/de
Ceased legal-status Critical Current

Links

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)
  • General Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (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)
EP00952861A 1999-06-23 2000-06-23 Verfahren zur rückgewinnung von metallischem chrom aus chromoxid enthaltenden schlacken Ceased EP1194597A1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19929551 1999-06-23
DE19929551 1999-06-23
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 (cs)
EP (1) EP1194597A1 (cs)
JP (2) JP2003502504A (cs)
KR (1) KR20020014821A (cs)
CN (1) CN1217017C (cs)
AU (1) AU6554700A (cs)
BR (1) BR0011949A (cs)
CZ (1) CZ303288B6 (cs)
MX (1) MXPA01012898A (cs)
PL (1) PL352472A1 (cs)
RU (1) RU2247161C2 (cs)
WO (1) WO2000079014A1 (cs)
ZA (1) ZA200200517B (cs)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE248236T1 (de) * 2000-01-28 2003-09-15 Holcim Ltd Verfahren zum entchromen und/oder entnickeln von flüssigen schlacken
US7094271B2 (en) * 2000-10-18 2006-08-22 Sms Demag Ag Method for producing stainless steels, in particular high-grade steels containing chromium and chromium-nickel
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
PT1747297E (pt) * 2004-05-18 2008-02-13 Holcim Ltd Método para a redução de cr em escórias metalúrgicas contendo cr
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
EP4212636A4 (en) 2020-09-10 2024-03-06 JFE Steel Corporation PROCESS FOR PRODUCING CHROME-CONTAINING MOLTED IRON
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 (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3012875A (en) * 1959-12-04 1961-12-12 Strategic Udy Metallurgical & Chemical Processes Ltd Metallurgical process
AT327569B (de) * 1972-02-15 1976-02-10 Graenges Verfahren zur vollstandigen, okonomischen und umweltschutzenden behandlung von metallurgischen schlacken
JPS5713606B2 (cs) * 1973-04-05 1982-03-18
JPS5324001B2 (cs) * 1973-10-02 1978-07-18
JPS5653605B2 (cs) * 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
US4565574A (en) * 1984-11-19 1986-01-21 Nippon Steel Corporation Process for production of high-chromium alloy by smelting reduction
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
KR100194133B1 (ko) * 1989-06-02 1999-06-15 얀 로버트 난키벨 용융조반응기를 사용한 합금철의 제조방법
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
RU2070579C1 (ru) * 1991-07-12 1996-12-20 Катаргин Анатолий Юрьевич Способ рафинирования высокохромистых сталей и сплавов от углерода
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
RU2081785C1 (ru) * 1994-09-27 1997-06-20 Научно-производственное объединение "Винт" Движитель судна
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

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0079014A1 *

Also Published As

Publication number Publication date
CN1217017C (zh) 2005-08-31
PL352472A1 (en) 2003-08-25
US6679931B1 (en) 2004-01-20
CN1357055A (zh) 2002-07-03
JP2003502504A (ja) 2003-01-21
CZ20014667A3 (cs) 2002-05-15
AU6554700A (en) 2001-01-09
CZ303288B6 (cs) 2012-07-18
WO2000079014A1 (de) 2000-12-28
BR0011949A (pt) 2002-03-26
RU2247161C2 (ru) 2005-02-27
ZA200200517B (en) 2003-06-25
JP2013079449A (ja) 2013-05-02
KR20020014821A (ko) 2002-02-25
MXPA01012898A (es) 2002-07-30

Similar Documents

Publication Publication Date Title
EP1194597A1 (de) Verfahren zur rückgewinnung von metallischem chrom aus chromoxid enthaltenden schlacken
EP1090152B1 (de) Verfahren zum aufarbeiten von stahlschlacken
EP2207905B1 (de) Verfahren zur rostfreistahlerzeugung mit direktreduktionsöfen für ferrochrom und ferronickel auf der primärseite eines konverters
AT403293B (de) Verfahren und anlage zum herstellen von legierten stählen
DE3321687A1 (de) Verfahren und vorrichtung zum kontinuierlichen windfrischen von nichteisen-lechen
EP1627085B1 (de) Verfahren zur rückgewinnung von metallischen elementen, insbesondere metallischem chrom, aus metalloxidhaltigen schlacken im elektrolichtbogenofen
DE69611634T2 (de) Verwendung von schwefelhaltigem Nickelkonzentrat bei der Herstellung von nickellegiertem rostfreien Stahl
EP0171845A1 (de) Verfahren und Vorrichtung zur kontinuierlichen pyrometallurgischen Verarbeitung von Kupferbleistein
EP1064412B1 (de) Verfahren zum umwandeln von schlacken aus der nicht-eisenmetallurgie
EP1747297B1 (de) Verfahren zur reduktion von cr aus cr-haltigen metallurgischen schlacken
WO2004083464A1 (fr) Procede d'alliage direct de l'acier
EP3074540B1 (de) Verfahren zum bearbeiten von entschwefelungsschlacke
KR950003806B1 (ko) 용강중의 몰리브덴 첨가방법
EP0086732B1 (de) Verfahren zum Erhöhen der Kühlstoffsätze beim Herstellen von Stahl durch Sauerstoffaufblasen
DE3240656A1 (de) Verfahren zur schmelzreduktion von metallerz
EP1490522B1 (de) Verfahren zur behandlung von legierten kohlenstoffhaltigen eisenschmelzen zur herstellung von stahl
EP1184469A2 (de) Verfahren zur Behandlung wertstoffhaltigen Staubes aus der Stahlherstellung
EP1630238B1 (de) Verfahren zur Rückgewinnung von metallischen Elementen aus metalloxidhaltigen Schlacken
EP0877830A1 (de) Verfahren zum abtrennen von zinn sowie erforderlichenfalls von kupfer aus schrottschmelzen, insbesondere weissblechschmelzen oder metallischen schmelzen
DE2452158A1 (de) Verfahren zum aufbereiten von eisenhaltigem metall
AT404023B (de) Verfahren zum entkupfern von eisenreichen schmelzen
JPH11193417A (ja) 合金鋼の高清浄度化方法
WO1999016917A1 (de) Pyrometallurgisches verfahren und vorrichtung zur abtrennung von zink und/oder kadmium und blei aus hüttenwerkabfallstoffen
SU881125A1 (ru) Способ производства конструкционной стали
JPS6362814A (ja) 低水素鋼の製造方法

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20011214

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

17Q First examination report despatched

Effective date: 20020417

APBR Date of receipt of statement of grounds of appeal recorded

Free format text: ORIGINAL CODE: EPIDOSNNOA3E

APAF Appeal reference modified

Free format text: ORIGINAL CODE: EPIDOSCREFNE

APBT Appeal procedure closed

Free format text: ORIGINAL CODE: EPIDOSNNOA9E

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN REFUSED

18R Application refused

Effective date: 20060220