US20040168550A1 - Method for accelerating separation of granular metallic iron from slag - Google Patents

Method for accelerating separation of granular metallic iron from slag Download PDF

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Publication number
US20040168550A1
US20040168550A1 US10/483,981 US48398104A US2004168550A1 US 20040168550 A1 US20040168550 A1 US 20040168550A1 US 48398104 A US48398104 A US 48398104A US 2004168550 A1 US2004168550 A1 US 2004168550A1
Authority
US
United States
Prior art keywords
metallic iron
slag
iron
cooling
mixed solid
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.)
Abandoned
Application number
US10/483,981
Other languages
English (en)
Inventor
Osamu Tsuge
Shohei Yoshida
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kobe Steel Ltd
Original Assignee
Kobe Steel Ltd
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 Kobe Steel Ltd filed Critical Kobe Steel Ltd
Assigned to KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.) reassignment KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.) ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: TSUGE, OSAMU, YOSHIDA, SHOHEI
Publication of US20040168550A1 publication Critical patent/US20040168550A1/en
Abandoned legal-status Critical Current

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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
    • C21B13/10—Making spongy iron or liquid steel, by direct processes in hearth-type furnaces
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B3/00—General features in the manufacture of pig-iron
    • C21B3/04—Recovery of by-products, e.g. slag
    • C21B3/06—Treatment of liquid slag
    • C21B3/08—Cooling slag
    • 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
    • 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
    • C21B13/0086—Conditioning, transformation of reduced iron ores
    • 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
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B2400/00—Treatment of slags originating from iron or steel processes
    • C21B2400/02—Physical or chemical treatment of slags
    • C21B2400/022—Methods of cooling or quenching molten slag
    • C21B2400/024—Methods of cooling or quenching molten slag with the direct use of steam or liquid coolants, e.g. water
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B2400/00—Treatment of slags originating from iron or steel processes
    • C21B2400/02—Physical or chemical treatment of slags
    • C21B2400/022—Methods of cooling or quenching molten slag
    • C21B2400/026—Methods of cooling or quenching molten slag using air, inert gases or removable conductive bodies
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B2400/00—Treatment of slags originating from iron or steel processes
    • C21B2400/05—Apparatus features
    • C21B2400/06—Conveyors on which slag is cooled
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B2400/00—Treatment of slags originating from iron or steel processes
    • C21B2400/05—Apparatus features
    • C21B2400/062—Jet nozzles or pressurised fluids for cooling, fragmenting or atomising slag
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B2400/00—Treatment of slags originating from iron or steel processes
    • C21B2400/05—Apparatus features
    • C21B2400/066—Receptacle features where the slag is treated
    • C21B2400/068—Receptacle features where the slag is treated with a sealed or controlled environment
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B2400/00—Treatment of slags originating from iron or steel processes
    • C21B2400/05—Apparatus features
    • C21B2400/066—Receptacle features where the slag is treated
    • C21B2400/072—Tanks to collect the slag, e.g. water tank

Definitions

  • the granular metallic iron is produced with reduction melting of the raw-material agglomerates described above.
  • a practical method for the reduction melting is not limited to a particular one, but can be carried out using: a well-known reduction melting furnace. It is to be noted that while the present invention will be described below in connection with, for example, a method for producing metallic-iron using a reduction melting furnace of the moving hearth type, the present invention is not limited to the following description and the illustrated examples. The present invention will be described in detail with reference to the drawings showing a practical construction of the reduction melting furnace.
  • FIGS. 1 to 3 are schematic explanatory views showing one example of a reduction melting furnace of the moving hearth type developed by the inventors, to which the present invention is applied.
  • the furnace is of a dome-shaped structure having a rotary moving hearth in the doughnut form.
  • FIG. 1 is a schematic perspective view
  • FIG. 2 is a sectional view taken along the line A-A in FIG. 1
  • FIG. 3 is a schematic explanatory view showing a section of the reduction melting furnace in the developed form as viewed in the rotating direction of the rotary hearth in FIG. 1 for easier understanding.
  • numeral 1 denotes a rotary hearth
  • 2 denotes a furnace body covering the rotary hearth.
  • the rotary hearth 1 is constructed such that it can be driven by a driving device (not shown) to rotate at a proper speed.
  • a plurality of combustion burners 3 are disposed at appropriate places in a wall surface of the furnace body 2 . Combustion heat and radiation heat generated by the combustion burners 3 are transmitted to the raw-material agglomerates on the rotary hearth 1 for performing heating reduction of the raw-material agglomerates.
  • the interior of the furnace body 2 is divided by three partition walls K 1 , K 2 , K 3 into a first zone Z 1 , a second zone Z 2 , a third zone Z 3 , and a fourth zone Z 4 .
  • a raw-material supply means 4 is disposed in an opposed relation to the rotary hearth 1 at the most upstream side in the rotating direction of the furnace body 2 , and a discharging means 6 is provided at the most downstream side in the rotating direction (in other words, at the side immediately upstream of the supply means 4 because of the rotary structure).
  • the temperature of the metallic iron, etc. was measured by inserting a thermocouple in a mass of the mixed solid accumulated in the cooling tank.
  • the cooling tank using water as the coolant is shown in FIG. 7. Water was pooled in the cooling tank beforehand to cool the mixed solid, etc. introduced to the cooling tank. As a result of separately measuring a cooling rate of the mixed solid, etc. in a water dipped state, the cooling rate was 350° C./min.
  • the mixed solid, etc. were taken out of the cooling tank as required, and a total amount of the mixed solid was measured. Measured results are shown in Table 1.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Manufacture Of Iron (AREA)
US10/483,981 2001-07-24 2002-06-17 Method for accelerating separation of granular metallic iron from slag Abandoned US20040168550A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2001-223266 2001-07-24
JP2001223266A JP2003034813A (ja) 2001-07-24 2001-07-24 粒状金属鉄とスラグの分離促進方法
PCT/JP2002/005996 WO2003010342A1 (fr) 2001-07-24 2002-06-17 Procede permettant d'accelerer la separation de fer metallique granulaire de laitier

Publications (1)

Publication Number Publication Date
US20040168550A1 true US20040168550A1 (en) 2004-09-02

Family

ID=19056630

Family Applications (1)

Application Number Title Priority Date Filing Date
US10/483,981 Abandoned US20040168550A1 (en) 2001-07-24 2002-06-17 Method for accelerating separation of granular metallic iron from slag

Country Status (10)

Country Link
US (1) US20040168550A1 (fr)
EP (1) EP1411135A4 (fr)
JP (1) JP2003034813A (fr)
KR (1) KR100660658B1 (fr)
CN (1) CN1533443A (fr)
AU (1) AU2002311297B2 (fr)
CA (1) CA2448383A1 (fr)
RU (1) RU2312899C2 (fr)
TW (1) TW533239B (fr)
WO (1) WO2003010342A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040083853A1 (en) * 2002-10-09 2004-05-06 Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel Ltd.) Method for producing feed material for molten metal production and method for producing molten metal
US20040262822A1 (en) * 2001-09-19 2004-12-30 Hiroshi Ichikawa Reduced iron mass cooling method and cooling device
US8518146B2 (en) 2009-06-29 2013-08-27 Gb Group Holdings Limited Metal reduction processes, metallurgical processes and products and apparatus

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100768562B1 (ko) * 2006-09-15 2007-10-19 주식회사 대진디엠피 엘이디 조명 장치 및 그 제어 방법
JP2013227605A (ja) * 2012-04-24 2013-11-07 Kobe Steel Ltd 金属鉄含有焼結体
KR101404440B1 (ko) * 2013-10-25 2014-06-19 주식회사 세라메탈 폐원자재 재활용 처리 장치
JP6273891B2 (ja) * 2014-02-20 2018-02-07 新日鐵住金株式会社 移動炉床炉による金属酸化物の還元方法及び還元装置

Citations (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5531805A (en) * 1990-02-13 1996-07-02 The Illawarra Technology Corporation Limited Smelting ferrous materials
US6048381A (en) * 1995-01-23 2000-04-11 Voest-Alpine Industrieanlagenbau Gmbh Method and arrangement for cooling hot bulk material
US6210462B1 (en) * 1997-10-23 2001-04-03 Kabushiki Kaisha Kobe Seiko Sho Method and apparatus for making metallic iron
US6214087B1 (en) * 1999-03-19 2001-04-10 Midrex International B.V. Rotterdam, Zurich Branch Treatment of iron oxide agglomerates before introduction into furnace
US6241803B1 (en) * 1999-01-20 2001-06-05 Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) Method for manufacturing reduced iron pellets
US20010037703A1 (en) * 2000-04-10 2001-11-08 K. K. Kobe Seiko Sho (Kobe Steel, Ltd.) Method for producing reduced iron
US6383251B1 (en) * 1997-08-22 2002-05-07 William Lyon Sherwood Direct iron and steelmaking
US20020053307A1 (en) * 2000-10-31 2002-05-09 Natsuo Ishiwata Method for discharging reduced product from a moveable-hearth furnace and a discharging device
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
US6630010B2 (en) * 2000-03-30 2003-10-07 Midrex International B.V. Zurich Branch Method of producing metallic iron
US6648942B2 (en) * 2001-01-26 2003-11-18 Midrex International B.V. Rotterdam, Zurich Branch Method of direct iron-making / steel-making via gas or coal-based direct reduction and apparatus
US20040154436A1 (en) * 2001-06-18 2004-08-12 Shuzo Ito Method for producing granular metal
US20040173054A1 (en) * 2001-07-12 2004-09-09 Osamu Tsuge Method of manufacturing metal iron
US20060096675A1 (en) * 2003-01-16 2006-05-11 Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) Method for producing metallic iron
US20060169103A1 (en) * 2003-03-20 2006-08-03 Kabushiki Kaisha Kobe Seiko Sho Process for producing particulate iron metal
US20070034055A1 (en) * 2003-04-17 2007-02-15 Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) Method and apparatus for producing reduced metal

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3145834B2 (ja) * 1993-03-08 2001-03-12 株式会社神戸製鋼所 還元鉄ブリケットの製造方法
JPH10158710A (ja) * 1996-12-02 1998-06-16 Sumitomo Metal Mining Co Ltd 還元鉄ペレットの製造方法
JP3735004B2 (ja) * 2000-03-31 2006-01-11 住友重機械工業株式会社 ロータリーキルンから排出される溶融物の回収方法及びその装置

Patent Citations (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5531805A (en) * 1990-02-13 1996-07-02 The Illawarra Technology Corporation Limited Smelting ferrous materials
US6048381A (en) * 1995-01-23 2000-04-11 Voest-Alpine Industrieanlagenbau Gmbh Method and arrangement for cooling hot bulk material
US6383251B1 (en) * 1997-08-22 2002-05-07 William Lyon Sherwood Direct iron and steelmaking
US6210462B1 (en) * 1997-10-23 2001-04-03 Kabushiki Kaisha Kobe Seiko Sho Method and apparatus for making metallic iron
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
US6241803B1 (en) * 1999-01-20 2001-06-05 Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) Method for manufacturing reduced iron pellets
US6214087B1 (en) * 1999-03-19 2001-04-10 Midrex International B.V. Rotterdam, Zurich Branch Treatment of iron oxide agglomerates before introduction into furnace
US6630010B2 (en) * 2000-03-30 2003-10-07 Midrex International B.V. Zurich Branch Method of producing metallic iron
US20010037703A1 (en) * 2000-04-10 2001-11-08 K. K. Kobe Seiko Sho (Kobe Steel, Ltd.) Method for producing reduced iron
US6602320B2 (en) * 2000-04-10 2003-08-05 Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) Method for producing reduced iron
US20020053307A1 (en) * 2000-10-31 2002-05-09 Natsuo Ishiwata Method for discharging reduced product from a moveable-hearth furnace and a discharging device
US6648942B2 (en) * 2001-01-26 2003-11-18 Midrex International B.V. Rotterdam, Zurich Branch Method of direct iron-making / steel-making via gas or coal-based direct reduction and apparatus
US20040154436A1 (en) * 2001-06-18 2004-08-12 Shuzo Ito Method for producing granular metal
US20040173054A1 (en) * 2001-07-12 2004-09-09 Osamu Tsuge Method of manufacturing metal iron
US20060096675A1 (en) * 2003-01-16 2006-05-11 Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) Method for producing metallic iron
US20060169103A1 (en) * 2003-03-20 2006-08-03 Kabushiki Kaisha Kobe Seiko Sho Process for producing particulate iron metal
US20070034055A1 (en) * 2003-04-17 2007-02-15 Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) Method and apparatus for producing reduced metal

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040262822A1 (en) * 2001-09-19 2004-12-30 Hiroshi Ichikawa Reduced iron mass cooling method and cooling device
US20070296127A1 (en) * 2001-09-19 2007-12-27 Nippon Steel Corporation Method and apparatus for cooling reduced-iron agglomerate
US7618476B2 (en) * 2001-09-19 2009-11-17 Nippon Steel Corporation Method and apparatus for cooling reduced-iron agglomerate
US20040083853A1 (en) * 2002-10-09 2004-05-06 Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel Ltd.) Method for producing feed material for molten metal production and method for producing molten metal
US7198658B2 (en) 2002-10-09 2007-04-03 Kobe Steel, Ltd. Method for producing feed material for molten metal production and method for producing molten metal
US8518146B2 (en) 2009-06-29 2013-08-27 Gb Group Holdings Limited Metal reduction processes, metallurgical processes and products and apparatus

Also Published As

Publication number Publication date
EP1411135A4 (fr) 2007-08-22
RU2004105153A (ru) 2005-06-10
KR100660658B1 (ko) 2006-12-21
CN1533443A (zh) 2004-09-29
CA2448383A1 (fr) 2003-02-06
TW533239B (en) 2003-05-21
EP1411135A1 (fr) 2004-04-21
KR20040013155A (ko) 2004-02-11
JP2003034813A (ja) 2003-02-07
AU2002311297B2 (en) 2008-07-10
WO2003010342A1 (fr) 2003-02-06
RU2312899C2 (ru) 2007-12-20

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Legal Events

Date Code Title Description
AS Assignment

Owner name: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:TSUGE, OSAMU;YOSHIDA, SHOHEI;REEL/FRAME:015310/0922

Effective date: 20030601

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO PAY ISSUE FEE