EP2152925A1 - Verfahren zur herstellung von chrommetallnuggets aus chromiterzen/-konzentraten - Google Patents

Verfahren zur herstellung von chrommetallnuggets aus chromiterzen/-konzentraten

Info

Publication number
EP2152925A1
EP2152925A1 EP08710282A EP08710282A EP2152925A1 EP 2152925 A1 EP2152925 A1 EP 2152925A1 EP 08710282 A EP08710282 A EP 08710282A EP 08710282 A EP08710282 A EP 08710282A EP 2152925 A1 EP2152925 A1 EP 2152925A1
Authority
EP
European Patent Office
Prior art keywords
chromium
nuggets
production
ore
chromite
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.)
Withdrawn
Application number
EP08710282A
Other languages
English (en)
French (fr)
Other versions
EP2152925A4 (de
Inventor
Gajanan U. Kapur
Vilas D. Tathavadkar
Saripalli M. Rao
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.)
Tata Steel Ltd
Original Assignee
Tata Steel Ltd
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 Tata Steel Ltd filed Critical Tata Steel Ltd
Publication of EP2152925A1 publication Critical patent/EP2152925A1/de
Publication of EP2152925A4 publication Critical patent/EP2152925A4/de
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C27/00—Alloys based on rhenium or a refractory metal not mentioned in groups C22C14/00 or C22C16/00
    • C22C27/06—Alloys based on 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
    • C22B1/00—Preliminary treatment of ores or scrap
    • C22B1/02—Roasting processes
    • C22B1/10—Roasting processes in fluidised form
    • 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
    • C22B1/00—Preliminary treatment of ores or scrap
    • C22B1/14—Agglomerating; Briquetting; Binding; Granulating
    • C22B1/24—Binding; Briquetting ; Granulating
    • C22B1/2406—Binding; Briquetting ; Granulating pelletizing
    • 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
    • C22B5/00—General methods of reducing to metals
    • C22B5/02—Dry methods smelting of sulfides or formation of mattes
    • C22B5/10—Dry methods smelting of sulfides or formation of mattes by solid carbonaceous reducing agents
    • 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
    • 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 present invention relates to development of a process for production of chromium Nuggets. More particularly the present invention rotates to development of a process for production of chromium nuggets by low temperature preoxidized chromites ore/concentrates with 50-70 % metallization.
  • Another object of the present invention is to propose a process for production of chromium nuggets by low temperature reduction of pre-oxidized chromites ores/concentrated which saves energy.
  • a further object of the present invention is to propose a process for production of chromium nuggets by low temperature reduction of pre-oxidized chromites ores/concentrate which reduces the cost of production of ferro chrome by 20%.
  • a still further object of the present invention is to propose a process for production of chromium nuggets by low temperature reduction of pre- oxidized chromites ors/concentrated which reduces coke consumption.
  • An yet further object of the present inventions is to propose a process for production of chromium nuggets by low temperature reduction of pre- oxidized chromites ores/concentrated which possess a better reaction surface during further processing is steel melting.
  • a still another object of the present invention is to propose a process for production of chromium nuggets by low temperature reduction of pre- oxidized chromites ores/concentrated which can n exportable to used directly in stainless steel manufacturing.
  • the chromites ores/concentrates with Cr Fe ratio ranging from 1.0 to 3.3 we oxidized at low temperatures (900° C).
  • the oxidized samples show complete oxidation of FeO phase to Fe 2 O 3 .
  • Reduction of oxidized chromite ores/concentrate was carried out using coal ass reductant.
  • Flux used consists of silica source (quarl) and lime.
  • the reduction experiments carried out using the controlled atmosphere high temperature furnace.
  • the raw materials used alongwith there composition given is the following tables.
  • the experimental studies for reduction were carried out at low temperatures of 1400-1550 0 C.
  • the coal redundant is used in 30-50% excess of the stichoimeti ⁇ c carbon requirement for reduction of iron oxide (Fe 2 O 3 ) and chrome oxides (Cr 2 Os) in the ore.
  • the flux addition was carried out as quartz addition in the range of 0-10% excess of required for aluminium oxides and magnesium oxide dissolution to slag.
  • the lime addition was done in the rage of 3-10% of the chromite ore/concentrate.
  • Reduction was carried out in the temperature range of 1400-1550 0 C for 1.5- 3.0 hours.
  • the chromite nuggets product id shown in fig 1.
  • chromium carbides C 7 C 3
  • iron chromium carbides C 7 C 3
  • the Chemistry of the chromium metal, nugget and slag products produced is given in Table 2.
  • the metal nugget diameter ranges from 0.5-25 cms.
  • the metal and slag phase separation is clear which after quenching in water can be separated by physical separation methods.
  • the oxidation of the chromite ores also helps in reducing the reduction time.
  • Chromium oxide reacts at 1200 to 1600 0 C with carbon to form one of the carbides Cr 3 Cr 25 Cr 7 C 3 .
  • Fig 1 Shows a photo- view of chromium nugget produces other reduction of oxidized chromite ore/concentrates.
  • Fig 2 Shows a micro-structure of the chromium metal nugget.
  • Fig 3 Shows a process flow sheet for production of chromium nuggets.
  • Fig 3- shows A Process flow sheet for the commercial production of the chromium nuggets.
  • the oxides of the chromium ore/concentration (1) will be carried out in fluidized bed (2) rotary furnace (2) and a hot air (3) blow means also provided there.
  • the oxidized ore/concentrates are fed into storage bin (4), a bin of reduction (5) and a bin of flux (6) are provided near the oxidation unit.
  • the oxidized ores are then mixed in a mixer (7) and after mixing with the coal reductant and flux (silica, lime) is fed to s palletized (8).
  • the pellets are fed to a rotary hearth the furnace (9) for carrying out the reduction in it.
  • the metal and slag product obtained from the rotary hearth furnace (9) is fed to a physical separation unit (11) for the separation of chromium metal nuggets (12) and slag (13).

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Manufacture And Refinement Of Metals (AREA)
EP08710282.8A 2007-05-24 2008-02-12 Verfahren zur herstellung von chrommetallnuggets aus chromiterzen/-konzentraten Withdrawn EP2152925A4 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IN802KO2007 2007-05-24
PCT/IN2008/000087 WO2008142704A1 (en) 2007-05-24 2008-02-12 Process for the production of chromium metal nuggets from chromite ores/concentrates.

Publications (2)

Publication Number Publication Date
EP2152925A1 true EP2152925A1 (de) 2010-02-17
EP2152925A4 EP2152925A4 (de) 2016-11-09

Family

ID=40031451

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08710282.8A Withdrawn EP2152925A4 (de) 2007-05-24 2008-02-12 Verfahren zur herstellung von chrommetallnuggets aus chromiterzen/-konzentraten

Country Status (7)

Country Link
EP (1) EP2152925A4 (de)
JP (1) JP5364091B2 (de)
KR (1) KR101498995B1 (de)
CN (1) CN101765670B (de)
TR (1) TR200908848T1 (de)
WO (1) WO2008142704A1 (de)
ZA (1) ZA200908067B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110306058A (zh) * 2019-07-23 2019-10-08 中南大学 一种转底炉高效处理含锌铁冶金尘泥的工艺

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* Cited by examiner, † Cited by third party
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KR101469679B1 (ko) * 2009-03-02 2014-12-05 신화메탈 주식회사 연속 테르밋 반응을 이용한 저탄소페로크롬 제조방법
WO2011029269A1 (zh) * 2009-09-14 2011-03-17 重庆瑞帆再生资源开发有限公司 利用冶金焙烧和高炉对铬渣进行无害化处理的方法
WO2013011521A1 (en) * 2011-07-18 2013-01-24 Tata Steel Limited A method for direct reduction of oxidized chromite ore fines composite agglomerates in a tunnel kiln using carbonaceous reductant for production of reduced chromite product/ agglomerates applicable in ferrochrome or charge chrome production.
CN102432068B (zh) * 2011-09-28 2013-10-16 北京科技大学 一种生产铬酸钠的方法
CN102994850A (zh) * 2012-10-29 2013-03-27 海门市金易焊接材料有限公司 低碳金属铬
CN105612264A (zh) * 2013-08-01 2016-05-25 西北大学 用于增强的铬铁矿预还原的方法
WO2016115593A1 (en) * 2015-01-20 2016-07-28 Pelleton Ip Holdings Limited Method for producing a chromite agglomerate
EA201992240A1 (ru) * 2017-03-21 2020-03-23 Ланксесс Дойчланд Гмбх Способ получения железо- и хромсодержащих частиц
US10982300B2 (en) 2017-05-02 2021-04-20 Her Majesty The Queen In Right Of Canada As Represented By The Minister Of Natural Resources Carbothermic direct reduction of chromite using a catalyst for the production of ferrochrome alloy
CN107699685A (zh) * 2017-08-09 2018-02-16 江苏省冶金设计院有限公司 一种硅铬合金的生产方法
US10508319B1 (en) 2019-06-27 2019-12-17 MM Metals USA, LLC Method and system for producing low carbon ferrochrome from chromite ore and low carbon ferrochrome produced thereby
CN112251600A (zh) * 2019-07-22 2021-01-22 孙凌玉 一种铬金属化料球的制备方法和应用
CN112226615B (zh) * 2020-10-15 2021-11-12 中南大学 一种不锈钢固废的综合利用方法
GB202108524D0 (en) 2021-06-15 2021-07-28 Eestech Inc Improved smelting system

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JPS50136211A (de) * 1974-04-18 1975-10-29
US4414026A (en) * 1981-07-30 1983-11-08 Nippon Kokan Kabushiki Kaisha Method for the production of ferrochromium
JPS58193330A (ja) * 1982-05-04 1983-11-11 Kawasaki Steel Corp クロム鉱石の溶融還元法における予備還元方法及びその装置
PH22151A (en) * 1983-12-31 1988-06-01 Krupp Gmbh Process for the production of ferrochromium
JPS6169944A (ja) * 1984-09-13 1986-04-10 Nippon Steel Corp フエロクロムの溶融還元による製造方法
DE3518555C1 (de) * 1985-05-23 1986-01-09 Fried. Krupp Gmbh, 4300 Essen Verfahren zur Reduktion von eisenhaltigen Chromerzen
DE3713883A1 (de) * 1987-04-25 1988-11-17 Metallgesellschaft Ag Verfahren zur herstellung von ferrochrom
JP3335504B2 (ja) * 1995-07-21 2002-10-21 富士通株式会社 クロック分配装置
CN1172010C (zh) * 2001-11-15 2004-10-20 湖南铁合金集团有限公司 低钛高碳铬铁生产工艺
JP4307849B2 (ja) * 2003-01-07 2009-08-05 株式会社神戸製鋼所 クロム含有原料の還元方法

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110306058A (zh) * 2019-07-23 2019-10-08 中南大学 一种转底炉高效处理含锌铁冶金尘泥的工艺
CN110306058B (zh) * 2019-07-23 2021-03-12 中南大学 一种转底炉高效处理含锌铁冶金尘泥的工艺

Also Published As

Publication number Publication date
EP2152925A4 (de) 2016-11-09
TR200908848T1 (tr) 2012-02-21
ZA200908067B (en) 2010-07-28
JP2010528184A (ja) 2010-08-19
KR20100021620A (ko) 2010-02-25
CN101765670B (zh) 2013-07-17
JP5364091B2 (ja) 2013-12-11
CN101765670A (zh) 2010-06-30
KR101498995B1 (ko) 2015-03-06
WO2008142704A1 (en) 2008-11-27

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