CA2465990A1 - Method for reducing a particulate material containing a metal, especially iron ore - Google Patents
Method for reducing a particulate material containing a metal, especially iron ore Download PDFInfo
- Publication number
- CA2465990A1 CA2465990A1 CA002465990A CA2465990A CA2465990A1 CA 2465990 A1 CA2465990 A1 CA 2465990A1 CA 002465990 A CA002465990 A CA 002465990A CA 2465990 A CA2465990 A CA 2465990A CA 2465990 A1 CA2465990 A1 CA 2465990A1
- Authority
- CA
- Canada
- Prior art keywords
- reaction zone
- particulate material
- reducing gas
- process according
- several
- 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.)
- Granted
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
- C21B13/0033—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
-
- 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
- Y02P10/122—Reduction of greenhouse gas [GHG] emissions by capturing or storing CO2
-
- 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
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Dispersion Chemistry (AREA)
- Manufacture Of Iron (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
In a process for reducing iron-ore-containing particulate material in at least a two-stage process, reducing gas is conducted through at least two reaction zones consecutively arranged in series and formed by a moving particulate material and the particulate material passes through the reaction zones in reverse order to the reducing gas, with the particulate material being heated in the reaction zone arranged first for the particulate material and being reduced in the further reaction zone.
In order to achieve a maximum preheating temperature without any formation of magnetite, the reducing gas added to the first reaction zone is conditioned such that no or hardly any reduction takes place, although for the particulate material a preheating temperature within the fringe range of starting a reduction is achieved, whereby either the degree of oxidation of the reducing gas is increased or the temperature of the reducing gas is decreased or both measures are carried out jointly and whereby, in the reactor zone arranged second for the iron ore, a temperature level of at least about 600°C, preferably in the range of between 600 and 700°C, in particular of between 620 and 660°C, is adjusted and the iron-oxide-containing material is reduced to wuestite (Fig. 1).
In order to achieve a maximum preheating temperature without any formation of magnetite, the reducing gas added to the first reaction zone is conditioned such that no or hardly any reduction takes place, although for the particulate material a preheating temperature within the fringe range of starting a reduction is achieved, whereby either the degree of oxidation of the reducing gas is increased or the temperature of the reducing gas is decreased or both measures are carried out jointly and whereby, in the reactor zone arranged second for the iron ore, a temperature level of at least about 600°C, preferably in the range of between 600 and 700°C, in particular of between 620 and 660°C, is adjusted and the iron-oxide-containing material is reduced to wuestite (Fig. 1).
Claims (20)
1. A process for reducing iron-ore-containing particulate, in particular fine-particulate, material in at least a two-stage process, wherein reducing gas is conducted through at least two reaction zones consecutively arranged in series and formed by a moving particulate material and the particulate material passes through the reaction zones in reverse order to the reducing gas, with the particulate material being heated in the reaction zone arranged first for the particulate material and being reduced in the further reaction zone or in the further reduction zones, respectively, characterized in that the particulate material in the first reaction zone is heated to a preheating temperature by increasing the degree of oxidation of the reducing gas and/or decreasing the temperature of the reducing gas, which preheating temperature is within the fringe range of starting a reduction and is at a maximum with respect to avoiding a formation of magnetite, and that in the second reaction zone a temperature level of at least about 600°C, preferably in the range of between 600 and 700°C, in particular of between 620 and 660°C, is adjusted and the iron-oxide-containing material is reduced to wuestite.
2. A process for reducing metal-containing particulate, in particular fine-particulate, material in at least a two-stage process, wherein reducing gas is conducted through at least two reaction zones consecutively arranged in series and formed by a moving particulate material and the particulate material passes through, the reaction zones in reverse order to the reducing gas, with the particulate material being heated in the reaction zone arranged first for the particulate material and being reduced in the further reaction zone or in the further reduction zones, respectively, characterized in that the particulate material in the first reaction zone is heated to a preheating temperature by increasing the degree of oxidation of the reducing gas and/or decreasing the temperature of the reducing gas, which preheating temperature is within the fringe range of starting a reduction and is at a maximum with respect to avoiding a formation of magnetite, and that, in the reaction zone arranged first for the particulate material, a maximum reduction speed of 0.2% oxygen removal per minute, preferably of 0.05% oxygen removal per minute, is maintained.
3. A process according to claim 2, characterized in that iron ore is used as the particulate material.
4. A process according to claim 1, 2 or 3, characterized in that, in the reaction zone arranged first for the particulate material, a temperature level for the particulate material is adjusted by aid of the caloric content of the reducing gas, at which reduction of the particulate material would take place, that, however, in order to avoid reduction at that temperature level, the degree of oxidation of the reducing gas is increased to such an extent in that reaction zone that no or hardly any reduction takes place.
5. A process according to one or several of claims 1 to 4, characterized in that the adjustment of the temperature level and the degree of oxidation takes place independently of any fresh reducing gas used for reducing the particulate material, i.e. while avoiding the exertion of any influence on the chemical composition and the temperature of the reducing gas freshly supplied to the particulate material for final reduction.
6. A process according to one or several of claims 1 to 5, characterized in that a fine-particulate material, in particular a material having a particle size of up to 12 mm, preferably up to 10 mm, is treated either in the form of monograins or in the form of a grain strip.
7. A process according to one or several of claims 1 or 3 to 6, characterized in that, in the first reaction zone, a temperature level of between 350° and 550°C, preferably of between 400 and 470°C, is adjusted.
8. A process according to one or several of claims 1 to 7, characterized in that, in the reaction zone arranged second for the particulate material and in optionally existing further reaction zones, respectively, a temperature level that has been lowered as compared with the unaffected heat exchange is adjusted.
9. A process according to one or several of claims 1 to 8, characterized in that the adjustment of the temperature level in the reaction zone arranged first for the particulate material is effected by injecting H2O in liquid and/or vaporous form into that reaction zone and/or into the reducing gas supplied to this reaction zone.
10. A process according to one or several of claims 1 to 9, characterized in that the adjustment of the temperature level in. the reaction zone arranged first for the particulate material is effected by admixing a cold gas to that reaction zone and/or to the reducing gas supplied to this reaction zone, such as by admixing cold CO2 and/or a cold reducing gas.
11. A process according to one or several of claims 1 to 10, characterized in that the adjustment of the degree of oxidation of the reducing gas in the reaction zone arranged first for the particulate material is effected by supplying vaporous and/or liquid H2O into this reaction zone and/or into the reducing gas supplied to this reaction zone.
12. A process according to one or several of claims 1 to 11, characterized in that the adjustment of the degree of oxidation of the reducing gas in the reaction zone arranged first for the particulate material is effected by injecting CO2 and/or CO2/H2O-mixtures into this reaction zone and/or into the reducing gas supplied to this reaction zone.
13. A process according to one or several of claims 1 to 12, characterized in that an average retention time for the particulate material of up to 40 minutes, preferably up to 30 minutes, is maintained in the reaction zone arranged first for the particulate material.
14. A process according to one or several of claims 1 or 3 to 13, characterized in that a temperature level in the range of between 760 and 850°C, preferably in the range of from 770 to 800°C, is adjusted in the reaction zone arranged last for the iron ore.
15. A process according to one or several of claims 1 or 3 to 13, characterized in that, in the reaction zone arranged second for the particulate iron ore, a degree of oxidation for the imminent formation of wuestite is adjusted by one or several of the following measures:
.cndot. by varying the degree of oxidation of the fresh reducing gas, .cndot. by adjusting the temperature of the reducing gas, .cndot. by adjusting the retention time in the reaction zones following the second reaction zone for the iron ore, .cndot. by adjusting the specific amount of reducing gas, .cndot. by adjusting the composition of the reducing gas, in particular by varying the content of methane and/or the content of inert gas in the reducing gas.
.cndot. by varying the degree of oxidation of the fresh reducing gas, .cndot. by adjusting the temperature of the reducing gas, .cndot. by adjusting the retention time in the reaction zones following the second reaction zone for the iron ore, .cndot. by adjusting the specific amount of reducing gas, .cndot. by adjusting the composition of the reducing gas, in particular by varying the content of methane and/or the content of inert gas in the reducing gas.
16. A process according to one or several of claims 1 to 15, characterized in that the reducing gas emerging from the reaction zone arranged to follow the reaction zone arranged first for the particulate material in the flow direction of the material is introduced only partially into the first reaction zone, after cooling and scrubbing.
17. A process according to one or several of claims 1 to 16, characterized in that the reducing gas emerging from the reaction zone arranged first for the particulate material is recirculated at least partially into the first reaction zone.
18. A process according to one or several of claims 1 or 3 to 17, characterized in that the CO content of the reducing gas amounts to less than 20% and preferably is within a range of between 4 and 10%.
19. A process according to one or several of claims 1 or 3 to 18, characterized in that, in the reaction zone arranged first for the particulate iron ore, a vapour/carbon-ratio ranging from 2.5 to 5, preferably ranging from 2.5 to 4, is adjusted for the reducing gas.
20. A process according to one or several of claims 1 to 19, characterized in that, when the supply of metal-containing particulate material is interrupted, the temperature in the reaction zones is cooled down, preferably by regulating the temperature of the reducing gas and/or by injecting H2O or CO2, respectively.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ATA1533/2001 | 2001-09-27 | ||
| AT0153301A AT410803B (en) | 2001-09-27 | 2001-09-27 | METHOD FOR REDUCING METAL-CONTAINING, IN PARTICULAR IRON-CONTAINING, PARTICLE-SHAPED MATERIAL |
| PCT/AT2002/000254 WO2003027332A1 (en) | 2001-09-27 | 2002-08-28 | Method for reducing a particulate material containing a metal, especially iron ore |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2465990A1 true CA2465990A1 (en) | 2003-04-03 |
| CA2465990C CA2465990C (en) | 2012-02-07 |
Family
ID=3688320
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2465990A Expired - Fee Related CA2465990C (en) | 2001-09-27 | 2002-08-28 | Method for reducing a particulate material containing a metal, especially iron ore |
Country Status (12)
| Country | Link |
|---|---|
| US (2) | US20040237718A1 (en) |
| EP (1) | EP1430159A1 (en) |
| JP (1) | JP4331605B2 (en) |
| KR (1) | KR20040033073A (en) |
| CN (1) | CN1284866C (en) |
| AT (1) | AT410803B (en) |
| AU (1) | AU2002331402B2 (en) |
| CA (1) | CA2465990C (en) |
| EG (1) | EG23312A (en) |
| MX (1) | MXPA04002778A (en) |
| WO (1) | WO2003027332A1 (en) |
| ZA (1) | ZA200402384B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7713329B2 (en) | 2002-12-23 | 2010-05-11 | Posco | Apparatus for manufacturing molten irons to improve operation of fluidized bed type reduction apparatus and manufacturing method using the same |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7870717B2 (en) * | 2006-09-14 | 2011-01-18 | Honeywell International Inc. | Advanced hydrogen auxiliary power unit |
| CN105586462A (en) * | 2014-11-07 | 2016-05-18 | 株式会社Posco | Vertical pipe draining device for draining molten ion manufacturing equipment |
| CN106048214B (en) * | 2016-06-07 | 2017-11-28 | 东南大学 | A kind of synthesis gas reduction burning produces sintering deposit and separates CO2Devices and methods therefor |
| CN106048212B (en) * | 2016-06-07 | 2017-11-28 | 东南大学 | One kind classification reduction burning produces sintering deposit and separates CO2Device and method |
| CN106319126B (en) * | 2016-09-28 | 2019-05-17 | 中国科学院过程工程研究所 | One kind being used for the redox system and method for vanadium titano-magnetite fluidization |
| CN106467930B (en) * | 2016-09-28 | 2019-05-17 | 中国科学院过程工程研究所 | A kind of quick redox system and method for vanadium titano-magnetite fluidization high temperature |
| CN112858161B (en) * | 2021-01-12 | 2022-03-11 | 西南石油大学 | Device and method for measuring adhesion force of gas hydrate and pipeline wall surface |
| CN113373273A (en) * | 2021-06-17 | 2021-09-10 | 北京金博威科技有限公司 | Gas-based reduction method, gas-based reduction system and application of granular iron ore |
| CN113403441A (en) * | 2021-06-17 | 2021-09-17 | 北京金博威科技有限公司 | Production method, production system and application of granular direct reduced iron |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1535033A (en) * | 1967-07-31 | 1968-08-02 | Exxon Research Engineering Co | Iron ore reduction process |
| US3562780A (en) * | 1967-09-05 | 1971-02-09 | Exxon Research Engineering Co | Temperature control of iron ore reducing fluidized beds |
| DE2655813B2 (en) * | 1976-12-09 | 1980-10-23 | Kloeckner-Humboldt-Deutz Ag, 5000 Koeln | Process and plant for the direct and continuous extraction of iron |
| US4179282A (en) * | 1978-05-11 | 1979-12-18 | CVG-Siderurgica Del Orinoco, C.A. | Method for the reduction of metal oxides |
| JPS63140017A (en) * | 1986-11-29 | 1988-06-11 | Nippon Steel Corp | Prereduction of iron ore |
| US4898712A (en) * | 1989-03-20 | 1990-02-06 | Dow Corning Corporation | Two-stage ferrosilicon smelting process |
| US5082251A (en) * | 1990-03-30 | 1992-01-21 | Fior De Venezuela | Plant and process for fluidized bed reduction of ore |
| US5118479A (en) | 1990-08-01 | 1992-06-02 | Iron Carbide Holdings, Limited | Process for using fluidized bed reactor |
| AT402937B (en) | 1992-05-22 | 1997-09-25 | Voest Alpine Ind Anlagen | METHOD AND SYSTEM FOR DIRECTLY REDUCING PARTICULATE IRON OXIDE MATERIAL |
| US5531424A (en) * | 1993-04-19 | 1996-07-02 | Fior De Venezuela | Fluidized bed direct reduction plant |
| AT406271B8 (en) * | 1997-08-18 | 2000-05-25 | Voest Alpine Ind Anlagen | METHOD AND SYSTEM FOR DIRECTLY REDUCING PARTICULATE IRON OXIDE MATERIAL |
| DE19828310C2 (en) * | 1998-06-25 | 2000-08-31 | Forschungszentrum Juelich Gmbh | Single crystal powder and monograin membrane production |
-
2001
- 2001-09-27 AT AT0153301A patent/AT410803B/en not_active IP Right Cessation
-
2002
- 2002-08-28 CN CNB028189698A patent/CN1284866C/en not_active Expired - Fee Related
- 2002-08-28 MX MXPA04002778A patent/MXPA04002778A/en active IP Right Grant
- 2002-08-28 JP JP2003530897A patent/JP4331605B2/en not_active Expired - Fee Related
- 2002-08-28 EP EP02766919A patent/EP1430159A1/en not_active Withdrawn
- 2002-08-28 KR KR10-2004-7004541A patent/KR20040033073A/en not_active Application Discontinuation
- 2002-08-28 WO PCT/AT2002/000254 patent/WO2003027332A1/en active Application Filing
- 2002-08-28 AU AU2002331402A patent/AU2002331402B2/en not_active Ceased
- 2002-08-28 CA CA2465990A patent/CA2465990C/en not_active Expired - Fee Related
- 2002-09-25 EG EG2002091060A patent/EG23312A/en active
-
2004
- 2004-03-26 ZA ZA2004/02384A patent/ZA200402384B/en unknown
- 2004-03-29 US US10/813,140 patent/US20040237718A1/en not_active Abandoned
-
2007
- 2007-06-20 US US11/820,749 patent/US7597739B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7713329B2 (en) | 2002-12-23 | 2010-05-11 | Posco | Apparatus for manufacturing molten irons to improve operation of fluidized bed type reduction apparatus and manufacturing method using the same |
Also Published As
| Publication number | Publication date |
|---|---|
| ZA200402384B (en) | 2005-06-29 |
| US20070245853A1 (en) | 2007-10-25 |
| US7597739B2 (en) | 2009-10-06 |
| KR20040033073A (en) | 2004-04-17 |
| JP4331605B2 (en) | 2009-09-16 |
| AT410803B (en) | 2003-08-25 |
| US20040237718A1 (en) | 2004-12-02 |
| AU2002331402B2 (en) | 2008-05-29 |
| EP1430159A1 (en) | 2004-06-23 |
| CA2465990C (en) | 2012-02-07 |
| CN1284866C (en) | 2006-11-15 |
| CN1558958A (en) | 2004-12-29 |
| WO2003027332A1 (en) | 2003-04-03 |
| JP2005502790A (en) | 2005-01-27 |
| ATA15332001A (en) | 2002-12-15 |
| EG23312A (en) | 2004-11-30 |
| MXPA04002778A (en) | 2004-06-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2465990A1 (en) | Method for reducing a particulate material containing a metal, especially iron ore | |
| US4139375A (en) | Process for sintering powder metal parts | |
| US4584016A (en) | Method for controlling metallization and carburization in the reduction of metal ores to sponge iron | |
| US2231009A (en) | Heat treating process | |
| US6143053A (en) | Process for producing sponge iron by direct reduction of iron-oxide-containing material | |
| WO2012127760A1 (en) | Method of finish heat treatment of iron powder and apparatus for finish heat treatment | |
| JPS6240358A (en) | Rapid and homogenous cariburation-diffusion method for charged substance in furnace | |
| JP6112281B1 (en) | Method for producing alloy steel powder for powder metallurgy | |
| JP6112280B1 (en) | Method for producing alloy steel powder for powder metallurgy | |
| JPS61110701A (en) | Finish heat treatment of iron and steel powder | |
| WO2017056512A1 (en) | Production method for alloy steel powder for powder metallurgy | |
| CN105289220A (en) | High-temperature reductive protective gas circulation drying system and method | |
| JPS6364482B2 (en) | ||
| CA2183089C (en) | Process for avoiding stickers in the annealing of cold strip under hydrogen-containing atmospheres | |
| JPH0892632A (en) | Continuous annealing furnace and continuous annealing of silicon steel sheet | |
| EP3992145A1 (en) | Method for removing phosphorus from phosphorus-containing substance, method for producing starting material for metal smelting or starting material for metal refining, and method for producing metal | |
| JP6112278B1 (en) | Method for producing alloy steel powder for powder metallurgy | |
| JP3228951B2 (en) | Continuous decarburization annealing equipment for grain-oriented electrical steel sheets | |
| US2188275A (en) | Heat treatment of metals | |
| Obara et al. | Effect of Heat Cycle and Carbon Content on the Mechanical Properties of Continuous Annealed Low Carbon Steel Sheets | |
| US1732672A (en) | Method of roasting and reducing ores | |
| SU1468919A1 (en) | Method of producing low-carbon metallized pellets | |
| WO2017043090A1 (en) | Production method for alloy steel powder for powder metallurgy | |
| SU969766A1 (en) | Method for heat treating pellets | |
| SU1560589A1 (en) | Method of cooling iron-ore pellets |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |
Effective date: 20180828 |