CA2061548C - Direct reduction process in rotary hearth furnace - Google Patents
Direct reduction process in rotary hearth furnace Download PDFInfo
- Publication number
- CA2061548C CA2061548C CA 2061548 CA2061548A CA2061548C CA 2061548 C CA2061548 C CA 2061548C CA 2061548 CA2061548 CA 2061548 CA 2061548 A CA2061548 A CA 2061548A CA 2061548 C CA2061548 C CA 2061548C
- Authority
- CA
- Canada
- Prior art keywords
- pellets
- steel mill
- recovering iron
- rotary hearth
- mill wastes
- 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 - Fee Related
Links
- 238000011946 reduction process Methods 0.000 title description 5
- 239000008188 pellet Substances 0.000 claims abstract description 109
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 46
- 239000010959 steel Substances 0.000 claims abstract description 46
- 238000000034 method Methods 0.000 claims abstract description 41
- 239000000203 mixture Substances 0.000 claims abstract description 24
- 238000001035 drying Methods 0.000 claims abstract description 17
- 238000004939 coking Methods 0.000 claims abstract description 16
- 239000000428 dust Substances 0.000 claims abstract description 16
- 239000002912 waste gas Substances 0.000 claims abstract description 16
- 239000003575 carbonaceous material Substances 0.000 claims abstract description 14
- 230000009467 reduction Effects 0.000 claims abstract description 13
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 10
- 239000011701 zinc Substances 0.000 claims abstract description 10
- 239000011230 binding agent Substances 0.000 claims abstract description 8
- 239000000571 coke Substances 0.000 claims abstract description 8
- 229910000464 lead oxide Inorganic materials 0.000 claims abstract description 8
- CXKCTMHTOKXKQT-UHFFFAOYSA-N cadmium oxide Inorganic materials [Cd]=O CXKCTMHTOKXKQT-UHFFFAOYSA-N 0.000 claims abstract description 7
- CFEAAQFZALKQPA-UHFFFAOYSA-N cadmium(2+);oxygen(2-) Chemical class [O-2].[Cd+2] CFEAAQFZALKQPA-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000003245 coal Substances 0.000 claims abstract description 5
- 239000003610 charcoal Substances 0.000 claims abstract 3
- 239000003077 lignite Substances 0.000 claims abstract 3
- 239000002006 petroleum coke Substances 0.000 claims abstract 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 86
- 239000002699 waste material Substances 0.000 claims description 51
- 229910052742 iron Inorganic materials 0.000 claims description 39
- 238000007599 discharging Methods 0.000 claims description 9
- 229910044991 metal oxide Inorganic materials 0.000 claims description 9
- 238000007670 refining Methods 0.000 claims description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 8
- 229910052799 carbon Inorganic materials 0.000 claims description 8
- 239000007789 gas Substances 0.000 claims description 8
- 238000002844 melting Methods 0.000 claims description 8
- 230000008018 melting Effects 0.000 claims description 8
- 238000009628 steelmaking Methods 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 6
- 239000000956 alloy Substances 0.000 claims description 5
- 229910045601 alloy Inorganic materials 0.000 claims description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 5
- 239000000446 fuel Substances 0.000 claims description 5
- 229910052760 oxygen Inorganic materials 0.000 claims description 5
- 239000001301 oxygen Substances 0.000 claims description 5
- 239000003570 air Substances 0.000 claims description 4
- 238000002485 combustion reaction Methods 0.000 claims description 4
- 239000012080 ambient air Substances 0.000 claims description 3
- 239000003638 chemical reducing agent Substances 0.000 claims description 3
- 238000010891 electric arc Methods 0.000 claims description 3
- 238000007254 oxidation reaction Methods 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims description 2
- 239000010410 layer Substances 0.000 claims 4
- 238000005453 pelletization Methods 0.000 claims 4
- 238000010304 firing Methods 0.000 claims 3
- 238000000151 deposition Methods 0.000 claims 2
- 238000005266 casting Methods 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 claims 1
- 239000011241 protective layer Substances 0.000 claims 1
- 230000008569 process Effects 0.000 abstract description 16
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 abstract description 12
- 238000006722 reduction reaction Methods 0.000 description 8
- 239000012535 impurity Substances 0.000 description 7
- 235000013980 iron oxide Nutrition 0.000 description 6
- 229910052793 cadmium Inorganic materials 0.000 description 4
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 4
- 239000003673 groundwater Substances 0.000 description 4
- 238000011109 contamination Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 231100001261 hazardous Toxicity 0.000 description 2
- VBMVTYDPPZVILR-UHFFFAOYSA-N iron(2+);oxygen(2-) Chemical class [O-2].[Fe+2] VBMVTYDPPZVILR-UHFFFAOYSA-N 0.000 description 2
- 238000010310 metallurgical process Methods 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- 235000019738 Limestone Nutrition 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 239000010459 dolomite Substances 0.000 description 1
- 229910000514 dolomite Inorganic materials 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000002920 hazardous waste Substances 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 239000010808 liquid waste Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 235000014366 other mixer Nutrition 0.000 description 1
- YEXPOXQUZXUXJW-UHFFFAOYSA-N oxolead Chemical compound [Pb]=O YEXPOXQUZXUXJW-UHFFFAOYSA-N 0.000 description 1
- 239000010908 plant waste Substances 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000003134 recirculating effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
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
- C21B13/08—Making spongy iron or liquid steel, by direct processes in rotary furnaces
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B11/00—Making pig-iron other than in blast furnaces
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/0046—Making spongy iron or liquid steel, by direct processes making metallised agglomerates or iron oxide
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/10—Making spongy iron or liquid steel, by direct processes in hearth-type furnaces
- C21B13/105—Rotary hearth-type furnaces
-
- 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
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/16—Sintering; Agglomerating
-
- 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
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/24—Binding; Briquetting ; Granulating
-
- 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
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/02—Working-up flue dust
-
- 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
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/04—Working-up slag
-
- 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
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S75/00—Specialized metallurgical processes, compositions for use therein, consolidated metal powder compositions, and loose metal particulate mixtures
- Y10S75/961—Treating flue dust to obtain metal other than by consolidation
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Geochemistry & Mineralogy (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
- Liquid Crystal Substances (AREA)
- Manufacture Of Iron (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
- Earth Drilling (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US07/684,622 US5186741A (en) | 1991-04-12 | 1991-04-12 | Direct reduction process in a rotary hearth furnace |
| US07/684/622 | 1991-04-12 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2061548A1 CA2061548A1 (en) | 1992-10-13 |
| CA2061548C true CA2061548C (en) | 2001-11-20 |
Family
ID=24748829
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2061548 Expired - Fee Related CA2061548C (en) | 1991-04-12 | 1992-03-03 | Direct reduction process in rotary hearth furnace |
Country Status (11)
Families Citing this family (71)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5683488A (en) * | 1992-01-15 | 1997-11-04 | Metals Recycling Technologies Corp. | Method for producing an iron feedstock from industrial furnace waste streams |
| US5338336A (en) * | 1993-06-30 | 1994-08-16 | Bechtel Group, Inc. | Method of processing electric arc furnace dust and providing fuel for an iron making process |
| BE1008397A6 (fr) * | 1994-07-13 | 1996-05-07 | Centre Rech Metallurgique | Procede pour fabriquer une eponge de fer a basse teneur en soufre. |
| US5516358A (en) * | 1994-11-17 | 1996-05-14 | Pro-Tech Reclamation, Inc. | Method for the production of iron carbide |
| US5885521A (en) * | 1994-12-16 | 1999-03-23 | Midrex International B.V. Rotterdam, Zurich Branch | Apparatus for rapid reduction of iron oxide in a rotary hearth furnace |
| US5730775A (en) * | 1994-12-16 | 1998-03-24 | Midrex International B.V. Rotterdam, Zurich Branch | Method for rapid reduction of iron oxide in a rotary hearth furnace |
| US5538532A (en) * | 1995-03-02 | 1996-07-23 | Complete Recovery Process | Methods for recycling electric arc furnace dust |
| US5743934A (en) * | 1995-03-03 | 1998-04-28 | Magic Green Corporation | Soil conditioning agglomerates containing cement kiln dust |
| US6413291B1 (en) | 1995-03-03 | 2002-07-02 | Magic Green Corporation | Soil conditioning agglomerates containing calcium |
| US6287356B1 (en) | 1995-03-03 | 2001-09-11 | Magic Green Corporation | Soil conditioning agglomerates containing calcium |
| US5997599A (en) * | 1995-03-03 | 1999-12-07 | Magic Green Corporation | Soil conditioning agglomerates containing cement kiln dust |
| BE1009987A3 (fr) * | 1995-05-12 | 1997-11-04 | Centre Rech Metallurgique | Procede pour la fabrication d'une eponge de fer a basse teneur en soufre. |
| US5575829A (en) * | 1995-06-06 | 1996-11-19 | Armco Inc. | Direct use of sulfur-bearing nickel concentrate in making Ni alloyed stainless steel |
| US5567224A (en) * | 1995-06-06 | 1996-10-22 | Armco Inc. | Method of reducing metal oxide in a rotary hearth furnace heated by an oxidizing flame |
| US5601631A (en) * | 1995-08-25 | 1997-02-11 | Maumee Research & Engineering Inc. | Process for treating metal oxide fines |
| US5873925A (en) * | 1995-08-25 | 1999-02-23 | Maumee Research & Engineering, Inc. | Process for treating iron bearing material |
| GB9523229D0 (en) * | 1995-11-14 | 1996-01-17 | Allied Dust Processing Ltd | Method of processing finely divided material incorporating metal based constituents |
| WO1997032048A1 (fr) * | 1996-02-29 | 1997-09-04 | Nippon Steel Corporation | Procede et appareil de traitement de poussiere de production de fer |
| BG61917B1 (bg) * | 1996-07-30 | 1998-09-30 | Добрев, Никола И. | Метод за преработване на цинксъдържащи материали |
| JP3296974B2 (ja) * | 1996-08-15 | 2002-07-02 | 株式会社神戸製鋼所 | 直接還元法及び回転床炉 |
| IT1287799B1 (it) * | 1996-09-06 | 1998-08-18 | Demag Italimpianti Spa | Forno a suola rotante. |
| US5972066A (en) * | 1997-04-22 | 1999-10-26 | Iron Dynamics, Inc. | Mixed bed iron reduction process |
| US5951740A (en) * | 1997-06-16 | 1999-09-14 | Praxair Technology, Inc. | Production of direct reduced iron with reduced fuel consumption and emission of carbon monoxide |
| DE19739697C1 (de) * | 1997-09-02 | 1999-02-18 | Manfred Dr Ing Ottow | Verfahren und Vorrichtung zur Eisenerzreduktion |
| ID22491A (id) * | 1997-09-30 | 1999-10-21 | Kawasaki Steel Co | Tungku perapian putar untuk oksida peleburan dan metode pengoperasian daripadanya |
| CA2251339A1 (en) * | 1997-10-30 | 1999-04-30 | Hidetoshi Tanaka | Method of producing iron oxide pellets |
| US20040221426A1 (en) * | 1997-10-30 | 2004-11-11 | Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | Method of producing iron oxide pellets |
| TW495552B (en) * | 1997-12-18 | 2002-07-21 | Kobe Steel Ltd | Method of producing reduced iron pellets |
| AU726912B2 (en) * | 1998-03-20 | 2000-11-23 | Midrex Technologies Inc. | Method and apparatus for rapid reduction of iron oxide in a rotary hearth furnace |
| JP3081581B2 (ja) | 1998-03-23 | 2000-08-28 | 株式会社神戸製鋼所 | 高金属化率還元鉄塊成物の製造方法 |
| EP0952230A1 (en) * | 1998-03-24 | 1999-10-27 | KABUSHIKI KAISHA KOBE SEIKO SHO also known as Kobe Steel Ltd. | Method of producing reduced iron agglomerates |
| US6120577A (en) * | 1998-03-25 | 2000-09-19 | Ltv Steel Company, Inc. | Treatment of steel mill waste metal oxides |
| WO1999051783A1 (en) * | 1998-04-03 | 1999-10-14 | Iron Dynamics, Inc. | Method and apparatus for producing molten iron from iron oxides |
| JP2997459B1 (ja) | 1998-11-04 | 2000-01-11 | 株式会社神戸製鋼所 | 還元鉄塊成物の製造方法 |
| ES2146539B1 (es) * | 1998-05-28 | 2001-03-16 | Muga S L | Procedimiento de reciclado de polvo de aceria y producto obtenido con este procedimiento. |
| US6582491B2 (en) * | 1998-10-30 | 2003-06-24 | Midrex International, B.V. Rotterdam, Zurich Branch | Method for producing molten iron in duplex furnaces |
| AU761344B2 (en) * | 1998-10-30 | 2003-06-05 | Midrex Technologies Inc. | Method of producing molten iron in duplex furnaces |
| US6413295B2 (en) | 1998-11-12 | 2002-07-02 | Midrex International B.V. Rotterdam, Zurich Branch | Iron production method of operation in a rotary hearth furnace and improved furnace apparatus |
| US6126718A (en) * | 1999-02-03 | 2000-10-03 | Kawasaki Steel Corporation | Method of producing a reduced metal, and traveling hearth furnace for producing same |
| US6224820B1 (en) * | 1999-03-29 | 2001-05-01 | Kawasaki Steel Corporation | Method of producing a reduced metal, and traveling hearth furnace for producing same |
| FR2795400B1 (fr) * | 1999-06-22 | 2002-07-12 | Technologica | Materiau composite agglomere a base de poussieres riches en oxydes metalliques |
| ES2166673B1 (es) * | 1999-09-17 | 2003-10-16 | Cia Ind Asua Erandio S A Aser | Mejoras en el proceso waelz para el tratamiento de polvos de acerias. |
| US6409964B1 (en) | 1999-11-01 | 2002-06-25 | Her Majesty The Queen In Right Of Canada, As Represented By The Minister Of Natural Resources | Cold bonded iron particulate pellets |
| US6395060B1 (en) | 2000-06-19 | 2002-05-28 | Maumee Research & Engineering, Incorporated | Furnace flue dust processing method |
| US6464753B2 (en) | 2000-06-19 | 2002-10-15 | Maumee Research & Engineering, Incorporated | Furnace flue dust processing method |
| KR100530815B1 (ko) * | 2000-10-30 | 2005-11-25 | 신닛뽄세이테쯔 카부시키카이샤 | 환원로용 산화 금속 함유 미가공 팰릿, 그 제조 방법, 그환원 방법 및 환원 설비 |
| CA2428780A1 (en) | 2000-11-10 | 2002-05-16 | Nippon Steel Corporation | Method for operating rotary hearth type reducing furnace and rotary hearth type reducing furnace facilities |
| JP3553873B2 (ja) * | 2000-12-07 | 2004-08-11 | 株式会社神戸製鋼所 | 還元金属製造用回転式炉床炉及び還元金属の製造方法 |
| JP4669189B2 (ja) * | 2001-06-18 | 2011-04-13 | 株式会社神戸製鋼所 | 粒状金属鉄の製法 |
| JP2003147442A (ja) * | 2001-09-03 | 2003-05-21 | Nippon Steel Corp | 製鉄廃棄物の処理方法および設備 |
| WO2003031659A1 (fr) * | 2001-09-27 | 2003-04-17 | Nippon Steel Corporation | Procede de sechage d'un objet moule contenant du metal oxyde, procede de reduction de metal oxyde et four de reduction de metaux a sole tournante |
| JP4256645B2 (ja) * | 2001-11-12 | 2009-04-22 | 株式会社神戸製鋼所 | 金属鉄の製法 |
| AU2003269603B2 (en) * | 2002-10-15 | 2008-10-30 | D. Wilson Investments Pty Ltd | Process and apparatus for extracting zinc |
| AU2002952062A0 (en) | 2002-10-15 | 2002-10-31 | D.Wilson Investments Pty. Ltd. | Process and apparatus for extracting zinc |
| US8470068B2 (en) * | 2004-12-07 | 2013-06-25 | Nu-Iron Technology, Llc | Method and system for producing metallic iron nuggets |
| WO2006061788A1 (en) | 2004-12-07 | 2006-06-15 | Nu-Iron Technology, Llc | Method and system for producing metallic iron nuggets |
| CA2635025A1 (en) * | 2006-01-11 | 2007-07-19 | Solsys Limited | Production of carbonaceous metal ore pellets |
| US8021460B2 (en) * | 2006-07-26 | 2011-09-20 | Nu-Iron Technology, Llc | System and method for producing metallic iron nodules |
| US20110017016A1 (en) * | 2007-01-12 | 2011-01-27 | Nu-Iron Technology, Llc | System and method for cooling and removing iron from a hearth |
| KR101302765B1 (ko) * | 2008-07-11 | 2013-09-02 | 가부시키가이샤 고베 세이코쇼 | 브리켓의 제조방법, 환원 금속의 제조방법, 및 아연 또는 납의 분리방법 |
| EP2542706B1 (en) | 2010-03-02 | 2019-05-08 | Giulio Grossi | Apparatus and method for producing direct reduced iron |
| US8287621B2 (en) | 2010-12-22 | 2012-10-16 | Nu-Iron Technology, Llc | Use of bimodal carbon distribution in compacts for producing metallic iron nodules |
| KR101191962B1 (ko) | 2010-12-22 | 2012-10-17 | 주식회사 포스코 | 탄재 내장 괴성광 제조방법 |
| JP5877071B2 (ja) * | 2012-01-16 | 2016-03-02 | Ｐｒｉｍｅｔａｌｓ Ｔｅｃｈｎｏｌｏｇｉｅｓ Ｊａｐａｎ株式会社 | 部分還元鉄製造装置および部分還元鉄製造方法 |
| CN102839281B (zh) * | 2012-09-13 | 2015-08-05 | 莱芜钢铁集团有限公司 | 利用转底炉直接还原生产高炉护炉用含钛金属化球团的方法 |
| KR101504836B1 (ko) * | 2013-10-10 | 2015-03-30 | 주식회사 포스코 | 탄재 내장 브리켓의 제조장치 및 이를 이용한 제조방법 |
| ITMI20131732A1 (it) * | 2013-10-17 | 2015-04-18 | Ambiente E Nutrizione Srl | Procedimento di nobilitazione di polveri di scarto da cave minerarie, contenenti ossidi di ferro |
| KR101712829B1 (ko) * | 2014-09-24 | 2017-03-08 | 주식회사 포스코 | 소성로 및 이를 이용한 부분환원철 제조방법 |
| CN106119529A (zh) * | 2016-08-01 | 2016-11-16 | 江苏省冶金设计院有限公司 | 锌浸出渣的直接还原方法和系统 |
| BR112019001696A2 (pt) * | 2017-05-26 | 2019-06-18 | Novelis Inc | sistema de decapagem, e, método de formação de briquetes de pó. |
| BG67200B1 (bg) | 2018-03-22 | 2020-12-15 | "Кцм" Ад | Метод за химическо извличане на метали чрез преработване на промишлени отпадъци и модулна инсталация за неговото осъществяване |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3836353A (en) * | 1968-10-18 | 1974-09-17 | C Holley | Pellet reclamation process |
| US4251267A (en) * | 1979-08-24 | 1981-02-17 | Midrex Corporation | Method for direct reduction of metal oxide to a hot metallized product in solid form |
| EP0174641B1 (en) * | 1984-09-11 | 1991-12-11 | Sumitomo Heavy Industries, Ltd | A process for recovering valuable metals from an iron dust containing a higher content of zinc |
| US4622905A (en) * | 1985-03-04 | 1986-11-18 | International Metals Reclamation Co., Inc. | Furnacing |
| US4673431A (en) * | 1986-01-08 | 1987-06-16 | Bricmont & Associates, Inc. | Furnace dust recovery process |
| US4701214A (en) * | 1986-04-30 | 1987-10-20 | Midrex International B.V. Rotterdam | Method of producing iron using rotary hearth and apparatus |
| US4758268A (en) * | 1986-12-23 | 1988-07-19 | Zia Technology, Inc. | Method and apparatus for reclaiming metal values from electric arc furnace flue dust and sludge and rendering residual solids recyclable or non-hazardous |
| US4836847A (en) * | 1988-04-27 | 1989-06-06 | Zia Technology, Inc. | Method for reclaiming metal values from electric arc furnace flue dust and sludge and rendering residual solids recyclable or non-hazardous |
-
1991
- 1991-04-12 US US07/684,622 patent/US5186741A/en not_active Expired - Lifetime
-
1992
- 1992-03-03 CA CA 2061548 patent/CA2061548C/en not_active Expired - Fee Related
- 1992-03-17 EP EP19920104620 patent/EP0508166B1/en not_active Expired - Lifetime
- 1992-03-17 ES ES92104620T patent/ES2206441T3/es not_active Expired - Lifetime
- 1992-03-17 DE DE1992633172 patent/DE69233172T2/de not_active Expired - Fee Related
- 1992-03-17 AT AT92104620T patent/ATE248232T1/de not_active IP Right Cessation
- 1992-03-27 AU AU13886/92A patent/AU658174B2/en not_active Ceased
- 1992-04-08 BR BR9201258A patent/BR9201258A/pt not_active IP Right Cessation
- 1992-04-10 KR KR1019920005958A patent/KR100234844B1/ko not_active Expired - Fee Related
- 1992-04-10 MX MX9201682A patent/MX9201682A/es not_active IP Right Cessation
- 1992-04-13 JP JP11843392A patent/JPH05125454A/ja active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| US5186741A (en) | 1993-02-16 |
| AU658174B2 (en) | 1995-04-06 |
| MX9201682A (es) | 1992-10-01 |
| BR9201258A (pt) | 1992-12-01 |
| DE69233172T2 (de) | 2004-03-25 |
| EP0508166B1 (en) | 2003-08-27 |
| AU1388692A (en) | 1992-10-15 |
| KR920019952A (ko) | 1992-11-20 |
| EP0508166A2 (en) | 1992-10-14 |
| DE69233172D1 (de) | 2003-10-02 |
| JPH05125454A (ja) | 1993-05-21 |
| CA2061548A1 (en) | 1992-10-13 |
| EP0508166A3 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1994-02-23 |
| ATE248232T1 (de) | 2003-09-15 |
| ES2206441T3 (es) | 2004-05-16 |
| KR100234844B1 (ko) | 1999-12-15 |
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