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CA2366290A1 - A method and apparatus for reducing a feed material in a rotary hearth furnace - Google Patents

A method and apparatus for reducing a feed material in a rotary hearth furnace Download PDF

Info

Publication number
CA2366290A1
CA2366290A1 CA002366290A CA2366290A CA2366290A1 CA 2366290 A1 CA2366290 A1 CA 2366290A1 CA 002366290 A CA002366290 A CA 002366290A CA 2366290 A CA2366290 A CA 2366290A CA 2366290 A1 CA2366290 A1 CA 2366290A1
Authority
CA
Canada
Prior art keywords
furnace
zone
enclosure
feed material
rotary hearth
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
Application number
CA002366290A
Other languages
French (fr)
Other versions
CA2366290C (en
Inventor
Franklin G. Rinker
Deane A. Horne
James Alan Thornton
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.)
Maumee Research and Engineering Inc
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of CA2366290A1 publication Critical patent/CA2366290A1/en
Application granted granted Critical
Publication of CA2366290C publication Critical patent/CA2366290C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
    • F27B7/20—Details, accessories or equipment specially adapted for rotary-drum 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
    • C21B13/10—Making spongy iron or liquid steel, by direct processes in hearth-type furnaces
    • C21B13/105—Rotary hearth-type furnaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/14—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment
    • F27B9/16—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a circular or arcuate path
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/30—Details, accessories or equipment specially adapted for furnaces of these types
    • F27B9/3005—Details, accessories or equipment specially adapted for furnaces of these types arrangements for circulating gases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/30—Details, accessories or equipment specially adapted for furnaces of these types
    • F27B9/40—Arrangements of controlling or monitoring devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/30—Details, accessories or equipment specially adapted for furnaces of these types
    • F27B9/36—Arrangements of heating devices
    • F27B2009/3607—Heaters located above the track of the charge
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/06—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity heated without contact between combustion gases and charge; electrically heated
    • F27B9/062—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity heated without contact between combustion gases and charge; electrically heated electrically heated
    • F27B9/066—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity heated without contact between combustion gases and charge; electrically heated electrically heated heated by lamps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
    • F27D17/30—Arrangements for extraction or collection of waste gases; Hoods therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D9/00—Cooling of furnaces or of charges therein
    • F27D2009/0002—Cooling of furnaces
    • F27D2009/001—Cooling of furnaces the cooling medium being a fluid other than a gas
    • F27D2009/0013—Cooling of furnaces the cooling medium being a fluid other than a gas the fluid being water
    • F27D2009/0016—Water-spray
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D99/00—Subject matter not provided for in other groups of this subclass
    • F27D99/0001—Heating elements or systems
    • F27D99/0033—Heating elements or systems using burners
    • F27D2099/0046—Heating elements or systems using burners with incomplete combustion, e.g. reducing atmosphere
    • F27D2099/0048—Post- combustion
    • 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

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Metallurgy (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Organic Chemistry (AREA)
  • Tunnel Furnaces (AREA)
  • Manufacture Of Iron (AREA)
  • Incineration Of Waste (AREA)
  • Gasification And Melting Of Waste (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Furnace Details (AREA)

Abstract

A rotary hearth furnace for reducing a feed material. The rotary hearth furnace (10) includes a rotating hearth (12) disposed in an enclosure and mounted for rotary movement. The enclosure includes an annular inner wall (14), an annular outer wall (16) and a roof (18). The enclosure is sealed to the hearth and divided into a plurality of zones including at least a loading zone (28), a process zone (24) and a discharge zone (22). The furnace further includes a plurality of burners (20) positioned in at least the outer wall of the enclosure to provide a controlled temperature within the rotary hearth furnace and a flue (30) positioned within the reduction zone of the furnace between the preheat zone (26) and the discharge zone (22) to exhaust combustion gases from the burners and gases resulting from the processing of the feed material. Said flue contains space for combustion and settling of the unburned particulates. A water spray quench reduces the temperature of the furnace off-gas so that subsequent combustion by the introduction of air or oxygen does not produce significant nitrogen oxides.
CA002366290A 1999-03-15 1999-03-15 A method and apparatus for reducing a feed material in a rotary hearth furnace Expired - Fee Related CA2366290C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US1999/005671 WO2000055559A1 (en) 1999-03-15 1999-03-15 A method and apparatus for reducing a feed material in a rotary hearth furnace

Publications (2)

Publication Number Publication Date
CA2366290A1 true CA2366290A1 (en) 2000-09-21
CA2366290C CA2366290C (en) 2008-02-12

Family

ID=22272361

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002366290A Expired - Fee Related CA2366290C (en) 1999-03-15 1999-03-15 A method and apparatus for reducing a feed material in a rotary hearth furnace

Country Status (6)

Country Link
JP (1) JP2002539415A (en)
KR (1) KR100654478B1 (en)
CN (1) CN1175237C (en)
AU (1) AU768518B2 (en)
CA (1) CA2366290C (en)
WO (1) WO2000055559A1 (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002038815A1 (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
CN100445638C (en) * 2004-06-14 2008-12-24 张维田 Garbage incinerating method and continuous garbage incinerating system
PT103585B (en) * 2006-10-12 2008-11-03 Ventil Engenharia Do Ambiente COMBUSTION SYSTEM FOR VERTICAL BOILERS
JP5957348B2 (en) * 2012-09-21 2016-07-27 Ｐｒｉｍｅｔａｌｓ Ｔｅｃｈｎｏｌｏｇｉｅｓ Ｊａｐａｎ株式会社 Partially reduced iron production equipment
CN104792153B (en) * 2014-01-20 2017-12-01 宜宾恒旭窑炉科技开发有限公司 A kind of gas collection system of rotary kiln
CN104910924B (en) * 2014-03-14 2018-04-10 袁承世 A kind of ring kiln formula continuous type retort retort
CN111637431A (en) * 2020-06-05 2020-09-08 重庆赛迪热工环保工程技术有限公司 A waste heat boiler for recovering heat from flue gas of rotary hearth furnace
CN112981060B (en) * 2021-01-28 2022-09-06 济南华富锻造股份有限公司 Temperature-controlled quenching furnace
CN115786619B (en) * 2022-11-30 2024-12-24 黄冈市华窑中晋窑炉设备有限公司 A ring kiln for direct reduction of iron

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3836320A (en) * 1972-03-17 1974-09-17 Midland Ross Corp Minimum scale reheating furnace and means relating thereto
US4870912A (en) * 1988-02-25 1989-10-03 Westinghouse Electric Corp. Automatic combustion control method for a rotary combustor
US5632616A (en) * 1994-11-28 1997-05-27 Cadence Environmental Energy, Inc. Method and apparatus for injecting air into long cement kilns

Also Published As

Publication number Publication date
WO2000055559A1 (en) 2000-09-21
AU3090899A (en) 2000-10-04
KR20020001772A (en) 2002-01-09
KR100654478B1 (en) 2006-12-05
JP2002539415A (en) 2002-11-19
CA2366290C (en) 2008-02-12
CN1175237C (en) 2004-11-10
AU768518B2 (en) 2003-12-18
CN1338036A (en) 2002-02-27

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