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GB1320222A - Method of passivating iron - Google Patents

Method of passivating iron

Info

Publication number
GB1320222A
GB1320222A GB3845170A GB1320222DA GB1320222A GB 1320222 A GB1320222 A GB 1320222A GB 3845170 A GB3845170 A GB 3845170A GB 1320222D A GB1320222D A GB 1320222DA GB 1320222 A GB1320222 A GB 1320222A
Authority
GB
United Kingdom
Prior art keywords
iron
less
steam
oxygen
gas
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.)
Expired
Application number
GB3845170A
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.)
ExxonMobil Technology and Engineering Co
Original Assignee
Exxon Research and Engineering Co
Esso Research and Engineering Co
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 Exxon Research and Engineering Co, Esso Research and Engineering Co filed Critical Exxon Research and Engineering Co
Priority claimed from GB3845170A external-priority patent/GB1321634A/en
Publication of GB1320222A publication Critical patent/GB1320222A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B13/00—Making spongy iron or liquid steel, by direct processes
    • C21B13/0086—Conditioning, transformation of reduced iron ores
    • 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
    • Y02P10/10—Reduction of greenhouse gas [GHG] emissions
    • Y02P10/134—Reduction of greenhouse gas [GHG] emissions by avoiding CO2, e.g. using hydrogen

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Powder Metallurgy (AREA)
  • Hard Magnetic Materials (AREA)
  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)

Abstract

1320222 Modifying iron surfaces ESSO RESEARCH & ENG CO 10 Aug 1970 38451/70 Heading C7U Iron having a surface area exceeding 5 sq. metres per gram, e.g. finely divided particles formed by the reduction of fluidized iron ore, is passivated by contacting with steam or a free oxygen containing gas having an oxygen content of 2 to 18À5 mole per cent oxygen. The temperature of the iron at the start of the process is 1050 to 1600‹F. and is 1200 to 1450‹F. for less than a minute when the steam is used and 800 to 1000‹F. for 1 sec. to 5 mins., when the gas is used. The iron is then cooled to less than 400‹F. in less than 45 minutes.
GB3845170A 1970-08-10 1970-08-10 Method of passivating iron Expired GB1320222A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3845170A GB1321634A (en) 1969-07-31 1970-08-10 Centrifugal flow separator

Publications (1)

Publication Number Publication Date
GB1320222A true GB1320222A (en) 1973-06-13

Family

ID=10403535

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3845170A Expired GB1320222A (en) 1970-08-10 1970-08-10 Method of passivating iron

Country Status (1)

Country Link
GB (1) GB1320222A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1022348A1 (en) * 1999-01-20 2000-07-26 Kabushiki Kaisha Kobe Seiko Sho Method for manufacturing reduced iron pellets including controlled water cooling of the same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1022348A1 (en) * 1999-01-20 2000-07-26 Kabushiki Kaisha Kobe Seiko Sho Method for manufacturing reduced iron pellets including controlled water cooling of the same
US6241803B1 (en) 1999-01-20 2001-06-05 Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) Method for manufacturing reduced iron pellets

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Legal Events

Date Code Title Description
PS Patent sealed
PE20 Patent expired after termination of 20 years