AR019227A1 - METHOD AND APPARATUS FOR REDUCING PARTICLES CONTAINING IRON OXIDES TO PARTICLES CONTAINING METAL IRON - Google Patents
METHOD AND APPARATUS FOR REDUCING PARTICLES CONTAINING IRON OXIDES TO PARTICLES CONTAINING METAL IRONInfo
- Publication number
- AR019227A1 AR019227A1 ARP990103251A AR019227A1 AR 019227 A1 AR019227 A1 AR 019227A1 AR P990103251 A ARP990103251 A AR P990103251A AR 019227 A1 AR019227 A1 AR 019227A1
- Authority
- AR
- Argentina
- Prior art keywords
- particles
- reactor
- reduction
- particles containing
- fluidized bed
- Prior art date
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
- C21B13/0006—Making spongy iron or liquid steel, by direct processes obtaining iron or steel in a molten state
- C21B13/0013—Making spongy iron or liquid steel, by direct processes obtaining iron or steel in a molten state introduction of iron oxide into a bath of molten iron containing a carbon reductant
- C21B13/002—Reduction of iron ores by passing through a heated column of carbon
-
- 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
- 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
- C22B5/12—Dry methods smelting of sulfides or formation of mattes by gases
- C22B5/14—Dry methods smelting of sulfides or formation of mattes by gases fluidised material
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Dispersion Chemistry (AREA)
- Mechanical Engineering (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
Abstract
Un método y un aparato para la reduccion a hierro metálico de partículas que contienen oxidos de hierro de un amplio rango de tamanos. Laspartículas, que típicamente tienen tamanos comprendidos en un amplio rango, de aproximadamente 0.1 mm a aproximadamente 50 mm, son reducidas porcontacto con un gas reductor caliente, preferiblemente suministrado a través de un distribuidor de gas horizontal que define el nivel inferior de lazona de reduccion y que proporciona un flujo de gas uniforme y ascendente compuesto principalmente de hidrogeno (y/o monoxido de carbono) dentro de unrango de temperaturas entre 650*C y 1050*C y a una velocidad de aproximadamente 0.5 a 0.7 m/s para fluidizar por lo menos una porcion de las partículasque tienen un tamano de aproximadamente 1.0 mm o menos (cuando estén presentes). El gas reductor fluye hacia arriba a través de un lecho movildescendente de partículas más grandes y forma arriba de dicho lecho movil un lecho fluidizado de partículas más pequenas, amboslechos estando dentrode una sola cámara en el reactor de reduccion, donde las partículas alimentadas al reactor, alimentan al lecho fluidizado, preferiblemente en suparte inferior y las partículas más pequenas fluidizadas se extraen del reactor porla parte superior del lecho fluidizado. El gas reductor queya ha reaccionado con las partículas que contienen oxidos de hierro pasa por lo menos por un separador ciclonico y las partículas arrastradas por elgas generalmente se recirculan al reactor uopcionalmente se someten a reduccion en un lecho fluidizado de menor velocidad de gas en una segundacámara de reduccion en dicho reactor.A method and an apparatus for the reduction to metallic iron of particles containing iron oxides of a wide range of sizes. The particles, which typically have sizes in a wide range, from about 0.1 mm to about 50 mm, are reduced by contact with a hot reducing gas, preferably supplied through a horizontal gas distributor defining the lower level of the reduction zone and which provides a uniform and ascending gas flow composed mainly of hydrogen (and / or carbon monoxide) within a temperature range between 650 * C and 1050 * C and at a speed of approximately 0.5 to 0.7 m / s to fluidize at least a portion of the particles that have a size of approximately 1.0 mm or less (when present). The reducing gas flows upwardly through a moving bed of larger particles and forms a fluidized bed of smaller particles above said moving bed, both beds being in a single chamber in the reduction reactor, where the particles fed to the reactor, they feed the fluidized bed, preferably in its lower part and the smaller fluidized particles are extracted from the reactor through the upper part of the fluidized bed. The reducing gas that has already reacted with the particles containing iron oxides passes through at least one cyclonic separator and the particles carried by seaweed are generally recirculated to the reactor optionally subjected to reduction in a fluidized bed of lower gas velocity in a second chamber of reduction in said reactor.
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US9186998P | 1998-07-06 | 1998-07-06 | |
US9310398P | 1998-07-16 | 1998-07-16 | |
US09/165,985 US6132489A (en) | 1998-07-06 | 1998-10-02 | Method and apparatus for reducing iron-oxides-particles having a broad range of sizes |
US09/270,599 US6224649B1 (en) | 1998-07-06 | 1999-03-17 | Method and apparatus for reducing iron-oxides-particles having a broad range of sizes |
Publications (1)
Publication Number | Publication Date |
---|---|
AR019227A1 true AR019227A1 (en) | 2001-12-26 |
Family
ID=27376985
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ARP990103251 AR019227A1 (en) | 1998-07-06 | 1999-07-05 | METHOD AND APPARATUS FOR REDUCING PARTICLES CONTAINING IRON OXIDES TO PARTICLES CONTAINING METAL IRON |
Country Status (1)
Country | Link |
---|---|
AR (1) | AR019227A1 (en) |
-
1999
- 1999-07-05 AR ARP990103251 patent/AR019227A1/en unknown
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