SE410277B - Sett att koncentrera jern som er nervarande i lagverd jernmalm - Google Patents

Sett att koncentrera jern som er nervarande i lagverd jernmalm

Info

Publication number
SE410277B
SE410277B SE7810769A SE7810769A SE410277B SE 410277 B SE410277 B SE 410277B SE 7810769 A SE7810769 A SE 7810769A SE 7810769 A SE7810769 A SE 7810769A SE 410277 B SE410277 B SE 410277B
Authority
SE
Sweden
Prior art keywords
iron
present
ore
magnetic susceptibility
law
Prior art date
Application number
SE7810769A
Other languages
English (en)
Other versions
SE7810769L (sv
Inventor
Frank M Stephens Jr
Original Assignee
Hazen Research
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 Hazen Research filed Critical Hazen Research
Priority to SE7810769A priority Critical patent/SE410277B/sv
Publication of SE7810769L publication Critical patent/SE7810769L/sv
Publication of SE410277B publication Critical patent/SE410277B/sv

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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C1/00—Magnetic separation
    • B03C1/005—Pretreatment specially adapted for magnetic separation
    • B03C1/015—Pretreatment specially adapted for magnetic separation by chemical treatment imparting magnetic properties to the material to be separated, e.g. roasting, reduction, oxidation
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B13/00—Making spongy iron or liquid steel, by direct processes
    • C21B13/0033—In fluidised bed furnaces or apparatus containing a dispersion of the material
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B13/00—Making spongy iron or liquid steel, by direct processes
    • C21B13/006—Starting from ores containing non ferrous metallic oxides
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B13/00—Making spongy iron or liquid steel, by direct processes
    • C21B13/0073—Selection or treatment of the reducing gases
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B13/00—Making spongy iron or liquid steel, by direct processes
    • C21B13/14—Multi-stage processes processes carried out in different vessels or furnaces
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B15/00—Other processes for the manufacture of iron from iron compounds
    • 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
    • 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
    • C21C5/28—Manufacture of steel in the converter
    • 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
    • C21C5/28—Manufacture of steel in the converter
    • C21C5/30—Regulating or controlling the blowing
    • C21C5/32—Blowing from above
    • 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
    • C21C5/56—Manufacture of steel by other methods
    • 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
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B2100/00—Handling of exhaust gases produced during the manufacture of iron or steel
    • C21B2100/40—Gas purification of exhaust gases to be recirculated or used in other metallurgical processes
    • C21B2100/44—Removing particles, e.g. by scrubbing, dedusting
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B2100/00—Handling of exhaust gases produced during the manufacture of iron or steel
    • C21B2100/60—Process control or energy utilisation in the manufacture of iron or steel
    • C21B2100/66—Heat exchange
    • 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
    • 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)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Dispersion Chemistry (AREA)
  • Geochemistry & Mineralogy (AREA)
  • General Chemical & Material Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Environmental & Geological Engineering (AREA)
  • Carbon And Carbon Compounds (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Furnace Details (AREA)
  • Manufacture Of Iron (AREA)
  • Powder Metallurgy (AREA)
  • Compounds Of Iron (AREA)

Description

här? ' 7810769-5 2 Detta har fördelen att omagnetisk malm, såsom oxiderade tako- niter, kan uppkolas, varefter den erhållna magnetiska Järnkarbiden kan separeras från gångarten genom magnetisk attraktion.
I den föredragna metoden att omvandla järnoxiden till Järnkar- bid upphettar man järnoxiden till en temperatur av mellan 480°C och 705°C i en gasformig blandning som innehåller väte och ett kolhal- tigt material, varvid vätet förekommer i en mängd av över 60 volym- procent koloxid som förekommer i den fluidiserade bädden.
Det föredragna temperaturintervallet är 4800-65000. Under des- sa betingelser tjänstgör vätet såsom ett reduktionsmedel som om- vandlar det i oxiden föreliggande syret till vattenånga som för- svinner med avgaserna. Denna vattenånga kan sedermera lätt tas bort ur avgaserna, vilka därefter kan återcirkuleras. Det kolhal- tiga materialet tjänstgör såsom ett uppkolningsmedel som bildar järnkarbid. Ett exempel på den typ av reaktion som sker ges av ekvationen ÉFGO + H2 + CH4í-íß FejC + ÉHQO Järnkarbiden som härigenom återvinns ur gångarten kan omvand- las till stål, exempelvis i en basisk syreugn. I denna process in- går oxidering av kol i karbiden, huvudsakligen till koloxid, sam- tidigt som en del koldioxid bildas. Reaktionen är exotermisk, och under vissa förhållanden blir den självförsörjande på värme. Den erhållna reaktionen kan således representeras av följande ekva- tion Feš + 02 -----P ÖFG + 0,900 + (V),lC02 Ytterligare detaljer i den ovan beskrivna metoden kan åter- finnas i den svenska patentansökningen 761 44 90-6.
Järnkarbiden som sålunda utvinns ur gångarten kan reduceras till stål, exempelvis med hjälp av den metod som är beskriven i den ovannämnda publikationen.

Claims (2)

7810769-5 3 Patentkrav
1. Sätt att koncentrera järnet som är närvarande i en lågvärd järnmalm genom att utsätta malmen för magnetisk attraktion och avskilja material med en viss magnetisk susceptibilitet från ma- terial med försumbar eller ingen magnetisk susceptibilitet, k ä n n e t e c k n a t av det ursprungliga momentet att man ökar den magnetiska susceptibiliteten hos malmpartiklar genom att omvandla en avsevärd del av järnoxiden i malmen till järn- karbid som har större magnetisk susceptibilitet än järnoxiden.
2. Sätt enligt krav 1, k ä n n e t e c k n a t därav, att 1 nämnda ursprungliga moment omvandlas järnoxiden till järnkarbid genom att den upphettas till en temperatur av mellan 48000 och 70500 i en fluidiserad bädd i en gashaltig blandning som inne- håller väte och ett kolnaltigt material, varvid vätet förelig- ger i en mängd som överskrider 60 volymprocent koloxid som är närvarande 1 den fluidiserade bädden. ANFÖRDA PUBLIKATIONER:
SE7810769A 1975-10-14 1978-10-16 Sett att koncentrera jern som er nervarande i lagverd jernmalm SE410277B (sv)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SE7810769A SE410277B (sv) 1975-10-14 1978-10-16 Sett att koncentrera jern som er nervarande i lagverd jernmalm

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US05/622,101 US4053301A (en) 1975-10-14 1975-10-14 Process for the direct production of steel
SE7810769A SE410277B (sv) 1975-10-14 1978-10-16 Sett att koncentrera jern som er nervarande i lagverd jernmalm

Publications (2)

Publication Number Publication Date
SE7810769L SE7810769L (sv) 1978-10-16
SE410277B true SE410277B (sv) 1979-10-08

Family

ID=41667474

Family Applications (2)

Application Number Title Priority Date Filing Date
SE7614490A SE438000B (sv) 1975-10-14 1976-12-22 Process for framstellning av stal varvid i ett forsta steg jernoxid uppkolas till jernkarbid
SE7810769A SE410277B (sv) 1975-10-14 1978-10-16 Sett att koncentrera jern som er nervarande i lagverd jernmalm

Family Applications Before (1)

Application Number Title Priority Date Filing Date
SE7614490A SE438000B (sv) 1975-10-14 1976-12-22 Process for framstellning av stal varvid i ett forsta steg jernoxid uppkolas till jernkarbid

Country Status (23)

Country Link
US (2) US4053301A (sv)
JP (1) JPS6053084B2 (sv)
AT (2) AT372702B (sv)
AU (3) AU511757B2 (sv)
BE (1) BE859543A (sv)
BR (1) BR7608606A (sv)
CS (1) CS225806B1 (sv)
DD (2) DD139726A5 (sv)
DE (1) DE2700427A1 (sv)
DK (1) DK153956C (sv)
ES (1) ES462924A1 (sv)
FR (2) FR2375327A1 (sv)
HU (1) HU177214B (sv)
IE (3) IE46155B1 (sv)
IN (1) IN147340B (sv)
IT (1) IT1087734B (sv)
MX (2) MX5584E (sv)
NL (1) NL7710893A (sv)
NO (1) NO147344C (sv)
OA (1) OA05782A (sv)
PL (1) PL116930B1 (sv)
SE (2) SE438000B (sv)
ZA (1) ZA776003B (sv)

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US3765872A (en) * 1970-12-16 1973-10-16 Fierro Esponja Method and apparatus for the gaseous reduction of iron ore to sponge iron
US3788835A (en) * 1970-12-30 1974-01-29 Exxon Research Engineering Co Iron ore reduction process(nu-9)
ES394143A1 (es) * 1971-08-11 1974-11-16 Servicios De Ingenieria Proyec Perfeccionamientos en procedimientos y dispositivos emplea-dos para la eliminacion del oxigeno presente en los oxidos.
DE2401909C3 (de) * 1974-01-16 1985-06-27 Fried. Krupp Gmbh, 4300 Essen Verfahren zur Herstellung von Stahl
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JP2659727B2 (ja) * 1987-11-26 1997-09-30 株式会社日立製作所 オンラインシステム

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DK153956C (da) 1989-02-13
HU177214B (en) 1981-08-28
AU6083180A (en) 1980-11-06
SE7614490L (sv) 1978-06-23
ATA709977A (de) 1983-03-15
CS225806B1 (en) 1984-02-13
IE46155L (en) 1979-03-29
MX5693E (es) 1983-12-13
BR7608606A (pt) 1978-07-18
DK449177A (da) 1979-04-11
IE46157B1 (en) 1983-03-09
ES462924A1 (es) 1978-10-01
MX5584E (es) 1983-10-28
DD134649A5 (de) 1979-03-14
FR2431540A1 (fr) 1980-02-15
IT1087734B (it) 1985-06-04
IE822206L (en) 1979-03-29
IN147340B (sv) 1980-02-02
DD139726A5 (de) 1980-01-16
ZA776003B (en) 1979-05-30
FR2375327A1 (fr) 1978-07-21
IE46156B1 (en) 1983-03-09
SE7810769L (sv) 1978-10-16
PL201383A1 (pl) 1979-05-07
OA05782A (fr) 1981-05-31
AT372702B (de) 1983-11-10
NO147344C (no) 1983-03-23
FR2375327B1 (sv) 1981-06-19
AU1940976A (en) 1978-05-18
ATA546481A (de) 1983-03-15
AU4737079A (en) 1979-09-27
USRE32247E (en) 1986-09-16
NO147344B (no) 1982-12-13
IE46155B1 (en) 1983-03-09
FR2431540B1 (sv) 1981-11-20
JPS6053084B2 (ja) 1985-11-22
DE2700427A1 (de) 1978-07-13
JPS5362717A (en) 1978-06-05
AT372703B (de) 1983-11-10
BE859543A (fr) 1978-02-01
DK153956B (da) 1988-09-26
AU511757B2 (en) 1980-09-04
NO773452L (no) 1979-04-11
PL116930B1 (en) 1981-07-31
US4053301A (en) 1977-10-11
AU545314B2 (en) 1985-07-11
SE438000B (sv) 1985-03-25
NL7710893A (nl) 1979-04-06

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