BE823549A - Procede de passivation continue de particules d'eponges de fer. - Google Patents

Procede de passivation continue de particules d'eponges de fer.

Info

Publication number
BE823549A
BE823549A BE2054040A BE2054040A BE823549A BE 823549 A BE823549 A BE 823549A BE 2054040 A BE2054040 A BE 2054040A BE 2054040 A BE2054040 A BE 2054040A BE 823549 A BE823549 A BE 823549A
Authority
BE
Belgium
Prior art keywords
particles
passivation process
continuous passivation
iron sponges
sponges
Prior art date
Application number
BE2054040A
Other languages
English (en)
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 filed Critical
Publication of BE823549A publication Critical patent/BE823549A/fr

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
    • C23C8/08—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases only one element being applied
    • C23C8/10—Oxidising
    • C23C8/12—Oxidising using elemental oxygen or ozone
    • C23C8/14—Oxidising of ferrous surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/0006—Controlling or regulating processes
    • B01J19/002—Avoiding undesirable reactions or side-effects, e.g. avoiding explosions, or improving the yield by suppressing side-reactions
    • 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
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
    • 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)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Mechanical Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacture Of Iron (AREA)
  • Coating With Molten Metal (AREA)
  • Preventing Corrosion Or Incrustation Of Metals (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Thermotherapy And Cooling Therapy Devices (AREA)
  • Compounds Of Iron (AREA)
BE2054040A 1973-12-26 1974-12-19 Procede de passivation continue de particules d'eponges de fer. BE823549A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00428147A US3844764A (en) 1973-12-26 1973-12-26 Process for the continuous passivation of sponge iron particles

Publications (1)

Publication Number Publication Date
BE823549A true BE823549A (fr) 1975-04-16

Family

ID=23697735

Family Applications (1)

Application Number Title Priority Date Filing Date
BE2054040A BE823549A (fr) 1973-12-26 1974-12-19 Procede de passivation continue de particules d'eponges de fer.

Country Status (19)

Country Link
US (1) US3844764A (fr)
JP (1) JPS50116343A (fr)
AR (1) AR201803A1 (fr)
AT (1) AT337225B (fr)
BE (1) BE823549A (fr)
BR (1) BR7410603D0 (fr)
CA (1) CA1028602A (fr)
ES (1) ES433141A1 (fr)
FR (1) FR2256261B1 (fr)
GB (1) GB1445650A (fr)
IT (1) IT1027824B (fr)
KE (1) KE2998A (fr)
LU (1) LU71527A1 (fr)
MY (1) MY8000219A (fr)
NL (1) NL7416614A (fr)
NO (1) NO137450C (fr)
SE (1) SE7416089L (fr)
SU (1) SU563923A3 (fr)
ZA (1) ZA748089B (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4070180A (en) * 1976-08-23 1978-01-24 United States Steel Corporation Process for the passivation of sponge iron utilizing reducing gases containing free oxygen
DE3419638C2 (de) * 1984-05-25 1987-02-26 MAN Technologie GmbH, 8000 München Verfahren zur oxidativen Erzeugung von Schutzschichten auf einer Legierung
GB2288411B (en) * 1994-03-24 1998-04-15 Silberline Ltd Metal pigments
US5849817A (en) * 1994-03-24 1998-12-15 Silberline Limited Metal pigments
JP2001278420A (ja) * 2000-03-30 2001-10-10 Nippon Steel Corp 還元鉄の屋外貯蔵方法
SE548168C2 (en) * 2023-10-09 2026-04-13 Hybrit Dev Ab Process and system for production of passivated cold direct reduced iron

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2677669A (en) * 1945-01-11 1954-05-04 Atomic Energy Commission Stepwise stabilization of reduced metal catalysts
US2766108A (en) * 1955-06-30 1956-10-09 Bethlehem Steel Corp Method of deactivating sponge iron
US3147106A (en) * 1961-04-06 1964-09-01 Hydrocarbon Research Inc Use of lined passivation chamber in an iron powder passivating process
US3615340A (en) * 1968-11-18 1971-10-26 Exxon Research Engineering Co Quenching and passivation of particulate metals
US3617394A (en) * 1968-11-22 1971-11-02 Exxon Research Engineering Co Kiln passivation of reduced ores

Also Published As

Publication number Publication date
LU71527A1 (fr) 1975-06-17
IT1027824B (it) 1978-12-20
NO137450C (no) 1978-03-01
GB1445650A (en) 1976-08-11
KE2998A (en) 1979-12-14
ATA1013474A (de) 1976-10-15
DE2461152B2 (de) 1976-10-28
US3844764A (en) 1974-10-29
SU563923A3 (ru) 1977-06-30
JPS50116343A (fr) 1975-09-11
NO744604L (fr) 1975-07-21
SE7416089L (fr) 1975-06-27
AR201803A1 (es) 1975-04-15
NO137450B (no) 1977-11-21
ES433141A1 (es) 1976-11-16
FR2256261B1 (fr) 1979-07-27
BR7410603D0 (pt) 1975-09-02
CA1028602A (fr) 1978-03-28
DE2461152A1 (de) 1975-07-03
FR2256261A1 (fr) 1975-07-25
NL7416614A (nl) 1975-06-30
AU7652174A (en) 1976-06-17
ZA748089B (en) 1976-01-28
MY8000219A (en) 1980-12-31
AT337225B (de) 1977-06-27

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Legal Events

Date Code Title Description
RE Patent lapsed

Owner name: MIDREX INTERNATIONAL B.V. ROTTERDAM

Effective date: 19871231