公开(公告)号：EP1584693B1

公开(公告)日：2012-05-09

申请号：EP04702838.6

申请日：2004-01-16

Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)

Inventor： KIKUCHI, Shoichi; c/o KABUSHIKI KAISHA KOBE SEIKO ,  TSUGE, Osamu; c/o KABUSHIKI KAISHA KOBE SEIKO SHO ,  WHITTEN, Gilbert, Yould; c/o MIDREX TECHNOLOGIES ,  VOELKER, Brian, William; c/o MIDREX TECHNOLOGIES

IPC: C21B13/10 ,  C21B13/00

CPC classification number: C21B13/008 ,  C21B13/0006 ,  C21B13/0066 ,  C21B13/105 ,  C22B1/245 ,  F27B9/16 ,  F27D1/0006 ,  Y02P10/136

Abstract: A method for producing metallic iron wherein a mixture containing a carbonaceous reducing agent and iron oxides is supplied onto the hearth of a traveling reduction melting furnace and is heated to reduce and melt the iron oxide and the resultant metallic iron is cooled and then is discharged to the outside of the furnace and recovered, which comprises spreading, in advance, a hearth material having a powdery or granular form all over the hearth into a layer, to form a renewable hearth, prior to the supply of the raw material mixture, removing a part or all of the renewable hearth having been deteriorated in the operation of the furnace, supplying a new hearth material to renew the renewable hearth, leveling out the renewed hearth, and then supplying the above mixture to produce metallic iron. The method allows the easy removal and restoration even when a powder of metallic iron is buried in the surface of the hearth or the hearth is infiltrated or eroded by a slag, which results in the improvement of the availability and the easiness in the maintenance of a hearth and leads to the continuous operation of the hearth for a long period.

公开(公告)号：EP2039788A4

公开(公告)日：2011-02-23

申请号：EP06775350

申请日：2006-08-11

Applicant: LIU GUANGHUO ,  LIU SHENJIE

Inventor： LIU GUANGHUO ,  LIU SHENJIE

IPC: C22B1/16 ,  C21B3/02 ,  C21B5/02

CPC classification number: C22B1/16 ,  C21B13/006 ,  C21B13/008 ,  C21B13/14 ,  C22B5/10 ,  C22B23/005 ,  C22B23/023

公开(公告)号：EP2189547A1

公开(公告)日：2010-05-26

申请号：EP08830144.5

申请日：2008-09-11

Applicant: Nippon Steel Corporation

Inventor： IBARAKI, Tetsuharu ,  ODA, Hiroshi

IPC: C21B13/10 ,  C21B5/00 ,  C22B1/16 ,  C22B1/248

CPC classification number: C22B5/10 ,  C21B13/0046 ,  C21B13/008 ,  C21B13/105 ,  C22B1/245 ,  Y02P10/216

Abstract: In a method for producing a reduced iron pellet, when a powder formed article including iron oxide and carbon is heated and reduced in a rotary hearth furnace, a formed article produced using a raw material, in which an average diameter of the iron oxide is 50 microns or less and a ratio of carbon monoxide to carbon dioxide in a reduction zone is from 0.3 to 1, is reduced at a temperature of 1400°C or less, thereby producing a reduced iron pellet in which a metallization ratio of iron is 50 to 85% and a ratio of residual carbon is 2% or less.

Abstract translation: 在还原铁丸的制造方法中，将含有氧化铁和碳的粉末成形体在旋转炉床式炉内加热还原时，使用氧化铁的平均粒径为50μm的原料制造的成形体 微米或更小，并且还原区中一氧化碳与二氧化碳的比率为0.3至1，在1400℃或更低的温度下还原，从而产生还原铁颗粒，其中铁的金属化率为50至100。 85％，残碳率为2％以下。

公开(公告)号：EP2047000A4

公开(公告)日：2010-04-14

申请号：EP07813408

申请日：2007-07-26

Applicant: NU IRON TECHNOLOGY LLC

Inventor： IWASAKI IWAO ,  LINDGREN ANDREW J ,  KIESEL RICHARD F

IPC: C21B13/00 ,  C21B13/10

CPC classification number: C21B13/0046 ,  C21B13/008 ,  C21B13/105

公开(公告)号：EP1844168A1

公开(公告)日：2007-10-17

申请号：EP05824314.8

申请日：2005-12-07

Applicant: Nu-Iron Technology, LLC

Inventor： IWASAKI, Iwao ,  LALICH, Michael C. ,  BEAUDIN, Robert C. ,  KIESEL, Richard F. ,  LINDGREN, Andrew L. ,  BLEIFUSS, Rodney L

IPC: C21B13/00 ,  C21B13/10

CPC classification number: F27B9/028 ,  C21B13/0046 ,  C21B13/006 ,  C21B13/008 ,  C21B13/10 ,  C21B13/105 ,  C22B1/245 ,  C22B5/10 ,  F27B9/045 ,  F27B9/12 ,  F27B9/20 ,  F27B9/40

Abstract: Method and system for producing metallic nuggets includes providing reducible mixture (e.g., reducible micro-agglomerates; reducing material and reducible iron bearing material; reducible mixture including additives such as a fluxing agent; compacts, etc.) on at least a portion of a hearth material layer. In one embodiment, a plurality of channel openings extend at least partially through a layer of the reducible mixture to define a plurality of nugget forming reducible material regions. Such channel openings may be at least partially filled with nugget separation fill material (e.g., carbonaceous material). Thermally treating the layer of reducible mixture results in formation of one or more metallic iron nuggets. In other embodiments, various compositions of the reducible mixture and the formation of the reducible mixture provide one or more beneficial characteristics.

公开(公告)号：EP1437420A4

公开(公告)日：2007-08-22

申请号：EP03799416

申请日：2003-08-29

Applicant: KOBE STEEL LTD

Inventor： TANAKA HIDETOSHI ,  MIYAHARA ITSUO ,  UEMURA HIROSHI ,  HARADA TAKAO ,  KOBAYASHI ISAO ,  SUGITATSU HIROSHI

IPC: C01G23/04 ,  C21B5/02 ,  C21B11/08 ,  C21B13/00 ,  C21B13/10 ,  C21B13/14 ,  C21B15/02 ,  C21C5/54 ,  C22B7/04 ,  C22B34/12 ,  F27B9/02

CPC classification number: C21B13/0006 ,  C21B13/006 ,  C21B13/008 ,  C21B13/105 ,  C21B13/14 ,  C21B13/143 ,  C21C5/54 ,  C22B34/1218 ,  C22B34/1281 ,  Y02P10/136 ,  Y02P10/216 ,  Y02P10/23

Abstract: A method for producing a titanium containing slag, which comprises heating a raw material mixture containing a titanium oxide, an iron oxide and a carbonaceous reducing agent or another raw material mixture further containing a calcium oxide source in addition to the above in a reducing furnace to reduce the iron oxide in the mixture to a reduced iron, supplying the product to a heating type melting furnace, heating the product in the melting furnace to melt said reduced iron and separate it from a slag containing a titanium oxide, and discharge the resultant titanium oxide containing slag to the outside of the furnace for recovery. The method can be used for producing a titanium oxide containing slag from a material containing a titanium oxide and an iron oxide with good efficiency, while suppressing the reduction of titanium dioxide and minimizing electric power consumption.

公开(公告)号：EP1718776A1

公开(公告)日：2006-11-08

申请号：EP05700143.0

申请日：2005-01-31

Applicant: TECHNOLOGICAL RESOURCES PTY. LTD.

Inventor： DRY, Rodney, James ,  BATTERHAM, Robin, John

IPC: C21B13/00 ,  C21B3/04

CPC classification number: C21B13/008 ,  C21B3/04 ,  C21B13/0013 ,  C21C5/36 ,  C21C5/56 ,  C22B5/10 ,  C22B7/04 ,  Y02P10/216 ,  Y02W30/542

Abstract: A steelmaking process is disclosed. The process includes producing molten steel and molten steelmaking slag in a steelmaking process, the steelmaking slag including iron units and flux units, and thereafter producing molten iron in a molten bath based direct smelting process using a substantial portion of the steelmaking slag as part of the feed material requirements for the direct smelting process. A direct smelting process is also disclosed. The process includes pre-treating ferrous material including steelmaking slag and thereafter direct smelting molten iron using the pretreated ferrous material as part of the feed material for the process.

公开(公告)号：EP1338660A4

公开(公告)日：2005-08-17

申请号：EP01978958

申请日：2001-10-30

Applicant: NIPPON STEEL CORP

Inventor： IBARAKI TETUHARU ,  ODA HIROSHI ,  IMURA SHOJI ,  TAKAHASHI MASAHARU

IPC: C21B13/00 ,  C21B13/10 ,  C22B1/24 ,  C22B1/245 ,  C22B5/10 ,  F27B9/16 ,  F27B9/36 ,  F27D3/00 ,  C22B1/16

CPC classification number: C22B1/245 ,  C21B13/0046 ,  C21B13/008 ,  C21B13/105 ,  C22B1/2406 ,  C22B5/10 ,  F27B9/16 ,  F27B2009/3607 ,  F27D2003/001 ,  Y02P10/136

Abstract: A method and facilities for producing green pellets from a powdery raw material and reducing the green pellet in a rotary hearth type reducing furnace, which comprises kneading a raw material of a fine powder (including particles having a size of 10 mu m or less in an amount of 20 to 80 mass %) which contains metal oxides and carbon and is fed from a raw material storage tank (1) in a kneader (5), preparing green pellets with a pan-type pelletizer, classifying the resulting pellets with a pellet sieving device (9), drying the pellets with a pellet drying device (11), and then reducing the green pellets in a rotary hearth type reducing furnace (13), wherein the green pellets are transferred and treated continuously. The method allows the production of green pellets having high strength and the reduction of the green pellets in good efficiency with little collapse or pulverization of the pellets.

公开(公告)号：EP1405925A1

公开(公告)日：2004-04-07

申请号：EP02736123.7

申请日：2002-06-17

Applicant: Midrex International B.V. Zürich Branch

Inventor： TSUGE, Osamu, Kobe Corporate Research Laboratories ,  TANIGAKI,Yasuhiro, Kobe Corporate Research Lab. ,  KOBAYASHI,Isao, Kobe Corporate Research Labs. ,  TOKUDA, Koji, Kobe Corporate Research Laboratories ,  KIKUCHI, Shoichi, Kobe Corporate Research Labs. ,  ITO, Shuzo, Kobe Corporate Research Laboratories

IPC: C21B13/10

CPC classification number: C21B13/10 ,  C21B13/0006 ,  C21B13/0046 ,  C21B13/0066 ,  C21B13/008 ,  C21B13/105 ,  C22B1/245 ,  C22B5/10 ,  Y02P10/136

Abstract: The present invention is intended to provide a method for producing metallic iron, which comprises the steps of supplying a mixture containing a carbonous reducing agent and iron oxides onto a hearth of a reduction melting furnace of the moving hearth type, heating the mixture for reduction melting of the iron oxides, cooling thus-obtained metallic iron, and discharging the metallic iron to the outside of the furnace for recovery. The method can easily remove or repair the surface of a hearth even when metallic iron powder is buried in the hearth surface or even when the hearth surface suffers from slag infiltration and erosion, can increase an availability factor and maintainability of the hearth, and is suitably practiced for long-term continuous operation.
The present invention resides in a method for producing metallic iron, wherein a hearth material is laid in the form of a layer on the hearth prior to supply of the mixture, thereby forming a renewable hearth capable of being renewed, and the metallic iron is produced while renewing a part or the whole of the renewable hearth, which has deteriorated during operation, with the hearth material.

Abstract translation: 本发明旨在提供一种生产金属铁的方法，该方法包括以下步骤：将含有碳还原剂和氧化铁的混合物供应到移动炉床型还原熔炉的炉膛中，加热该混合物进行还原熔融 的氧化铁，冷却由此得到的金属铁，并将金属铁排出到炉外以回收。 即使当金属铁粉埋入炉底表面或甚至当炉床表面遭受炉渣渗入和侵蚀时，该方法也可以容易地去除或修复炉床表面，可以增加炉膛的可利用率和可维护性，并且适合于 实行长期连续作业。 本发明在于一种生产金属铁的方法，其中在供应混合物之前在炉床上以炉床的形式铺设炉床材料，从而形成可更新的可再生炉床，并生产金属铁 同时用炉床材料更新运行期间已经恶化的可再生炉膛的一部分或全部。

公开(公告)号：EP0643141B1

公开(公告)日：1998-03-25

申请号：EP94202526.3

申请日：1994-09-05

Applicant: Akzo Nobel N.V.

Inventor： Steeghs, Harry R.G.

IPC: C21B13/00

CPC classification number: C21B13/008 ,  C21B13/00