EP2171107B1 - Schutzdeckel für sinterbandvorrichtung mit kontinuierlicher sinterbandspur - Google Patents

Schutzdeckel für sinterbandvorrichtung mit kontinuierlicher sinterbandspur Download PDF

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Publication number
EP2171107B1
EP2171107B1 EP08775526A EP08775526A EP2171107B1 EP 2171107 B1 EP2171107 B1 EP 2171107B1 EP 08775526 A EP08775526 A EP 08775526A EP 08775526 A EP08775526 A EP 08775526A EP 2171107 B1 EP2171107 B1 EP 2171107B1
Authority
EP
European Patent Office
Prior art keywords
cover
strand sintering
track
strand
metal frame
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.)
Active
Application number
EP08775526A
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English (en)
French (fr)
Other versions
EP2171107A4 (de
EP2171107A1 (de
Inventor
Janne Ollila
Tom RÖNNBERG
Ari Ceder
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.)
Metso Corp
Original Assignee
Outotec Oyj
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
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Application filed by Outotec Oyj filed Critical Outotec Oyj
Publication of EP2171107A1 publication Critical patent/EP2171107A1/de
Publication of EP2171107A4 publication Critical patent/EP2171107A4/de
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Publication of EP2171107B1 publication Critical patent/EP2171107B1/de
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Classifications

    • 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
    • C22B1/20—Sintering; Agglomerating in sintering machines with movable grates
    • 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
    • F27B21/00—Open or uncovered sintering apparatus; Other heat-treatment apparatus of like construction
    • 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
    • F27D1/00—Casings; Linings; Walls; Roofs
    • F27D1/18—Door frames; Doors, lids, removable covers

Definitions

  • the invention relates to a cover as defined in the preamble of Claim 1.
  • Continuous strand sintering is used after pelletizing concentrate powder to agglomerate the pellets, improving their strength and reactivity.
  • a strand sintering furnace could be mentioned, which is used in the production of ferro-chromium and divided into several sequential zones, different temperature conditions prevailing in each one of them.
  • the strand sintering equipment includes a perforated steel belt, which is directed as an endless loop around two deflector rolls. At the forward end of the furnace, wet fresh pellets are fed onto the steel belt to form a bed with a thickness of a few decimetres.
  • the steel belt conveys the bed of pellets through the drying, heating, and sintering zones of the furnace and to a stabilizing or equalizing zone, after which the bed of pellets further travels through sequential cooling zones.
  • the pellets in a sintered form exit the strand sintering equipment at its tail.
  • the energy contained in the cooling gases of the tail of the furnace is used in drying, heating and sintering at the forward end of the furnace, which is why the strand sintering equipment includes a number of gas ducts to implement the gas circulation mentioned above.
  • the drying, heating, and sintering zones and the cooling zones comprise covers that are provided with gas units. There is no gas unit in the cover of the equalizing zone.
  • the invention relates to the cover of the equalizing zone, which does not have the gas unit, and which in the known technology usually has a structure that includes a cover with side walls and an essentially horizontal flat roof, which extends between the side walls on top of the sintering track.
  • a refractory lining Inside the steel-framed cover, there is a refractory lining.
  • the refractory lining is usually made of heavy ceramic material that withstands high temperatures.
  • the lining is poor in withstanding tension. Flexural tensile stresses are formed in the planar lining layer, which is why the steel frame that supports the lining must be very stiff, wherefore it becomes extremely heavy.
  • SU 1672184 relates to the cover of the sintering machine for use in ferrous metallurgy.
  • the cover includes additional walls set on the lateral walls of the housing.
  • the upper part of the cover has a convex shape.
  • GB 634871 relates to a furnace for a sintering machine having a row of movable pallets.
  • the furnace comprises vertical side walls, and a roof with a refractory lining substantially enclosing the space between the side walls and above the pallets.
  • the roof has an arcuate cross-section.
  • US 4065111 relates to a cover for the ignition frame of a sintering apparatus.
  • the cover includes an enclosed space through which combustion air for the substantially horizontally disposed burners of the sintering apparatus is conducted.
  • the dome cover comprises an inner and an outer shell forming said space therebetween and a refractory lining on the innermost surface of the inner shell.
  • the purpose of the invention is to eliminate the disadvantages mentioned above.
  • the purpose of the invention is to disclose a cover, which enables the use of a lighter skeleton structure of the cover than before.
  • a further purpose of the invention is to disclose a cover, wherein the tensile stresses exerted on the refractory lining are smaller than before and the strength of the lining can be improved.
  • the cover according to the invention is characterized in that which is presented in Claim 1.
  • the roof is a vaulted part in the area of which the metal frame and the refractory lining are arched like a vault
  • the metal frame includes a set of coolant channels for cooling the cover with a cooling intermediate agent conducted through the set of coolant channels.
  • the cooling further improves the durability of the lining and the anchor members of the lining.
  • the tensile stresses exerted on the cover become small, and mainly compression stresses occur in the vault.
  • any tensile stresses exerted on the refractory lining become smaller than before and the strength of the lining can be improved.
  • the metal frame can be made lighter than before, and in the hard and fragile lining that is good in withstanding compression but poor in withstanding tension, mainly only minor tensile stresses and mainly compression stresses occur.
  • the vault-like part is an arched barrel-vault structure in the lateral direction of the strand sintering track, its centre of curvature being in the longitudinal middle plane of the strand sintering track.
  • the vault-like part has a cross section of the shape of a circle segment.
  • the vault-like part is elliptical or has the shape of a parabolic arch.
  • the vault-like part has the shape of an inverted catenarian curve, i.e., a hyperbolical cosine. No tensile stresses occur in such an ideal vault shape.
  • Fig. 1 shows an example of an application of the cover, which is a strand sintering furnace that is used in the production of ferro-chromium and which is divided into several sequential zones I - VII, different temperature conditions prevailing in each one of them.
  • the strand sintering equipment includes a perforated steel belt 12, which is conveyed as an endless loop around two deflector rolls 13 an 14, at least one of which being a used roll. Wet fresh pellets are fed at the forward end of the furnace (left in the figure) on top of the steel belt 12 to form a bed with a thickness of several decimetres.
  • the steel belt 12 carries the bed of pellets through the drying zone (I, a temperature of about 350°C), the heating zone (II, a temperature of about 1150°C), and the sintering zone (III, a temperature of about 1350°C) of the furnace to the stabilizing or equalizing zone (IV), after which the bed of pellets further travels through a sequential first cooling zone (V, a temperature of about 1250°C), second cooling zone (VI, a temperature of about 1150°C) and third cooling zone (VII, a temperature of about 400°C).
  • V first cooling zone
  • VI a temperature of about 1150°C
  • VI a temperature of about 400°C
  • the strand sintering equipment includes a number of gas ducts 15, 16, 17 to implement the gas circulation mentioned above.
  • the drying, heating and sintering zones as well as the cooling zones comprise covers that are provided with gas units. There is no gas unit in the cover 1 of the equalizing zone.
  • the cross-sectional drawing of Fig. 2 comprises the cover 1 of the equalizing zone IV, comprising a vaulted part 4 that extends on top of the strand sintering track 2.
  • Cover 1 includes side walls 5 and a roof 6, which forms the vaulted part 4 and extends between the side walls 5.
  • Cover 1 includes a metal frame 7, which in the area of the vaulted part 4 of the cover is arched like a vault.
  • a refractory lining 9 is supported by a number of anchor elements 10 (see Fig. 4 ) to the lower side 8 of the metal frame 7 as a uniform layer that is arched like a vault. As seen in Figs.
  • the metal frame 7 comprises, in the area of both the roof 6 and the side walls 5, sets of coolant channels 11 for cooling the cover 1 with the cooling intermediate agent that is conducted through the sets of coolant channels.
  • the vaulted roof 6 is a barrel-vault structure, which is arched in the lateral direction of the strand sintering track 2, its cross section having the shape of a circle segment, and its centre of curvature being on the longitudinal middle plane of the strand sintering track 2.
  • the vaulted part can be elliptical, have the shape of a parabolic arch or the shape of an inverted catenarian curve, i.e., a hyperbolic cosine.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Metallurgy (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Materials Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Organic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Tunnel Furnaces (AREA)
  • Powder Metallurgy (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Belt Conveyors (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)

Claims (5)

  1. Abdeckung (1) der Ausgleichszone (IV) einer Bandsinteranlage (3), die mit einer ununterbrochenen Bandsinterbahn (2) versehen ist, wobei die Abdeckung (1) Seitenwände (5) und ein Dach, das sich zwischen den Seitenwänden (5) und über der Bandsinterbahn (2) erstreckt, aufweist und wobei die Abdeckung (1) ferner einen Metallrahmen (7) mit einer Unterseite (8) auf Seiten der Bandsinterbahn und eine feuerfeste Verkleidung (9), die durch zahlreiche Verankerungselemente (10) an der Unterseite (8) des Metallrahmens getragen wird, enthält, dadurch gekennzeichnet, dass das Dach (6) ein gewölbtes Teil ist, in dessen Bereich der Metallrahmen (7) und die feuerfeste Verkleidung (9) wie ein Gewölbe gebogen sind, und
    dass der Metallrahmen (7) eine Gruppe von Kühlmittelkanälen (11) umfasst, um die Abdeckung mit einem Kühlungszwischenmittel, das durch die Gruppe von Kanälen geleitet wird, zu kühlen.
  2. Abdeckung nach Anspruch 1, dadurch gekennzeichnet, dass das gewölbte Teil (4) eine Trommelgewölbestruktur ist, die in seitlicher Richtung der Bandsinterbahn (2) gebogen ist, wobei sich ihr Krümmungszentrum auf der longitudinalen Mittelebene der Bandsinterbahn befindet.
  3. Abdeckung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das gewölbte Teil (4) einen Querschnitt in Form eines Kreissegments hat.
  4. Abdeckung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass das gewölbte Teil (4) elliptisch ist oder die Form eines parabolförmigen Bogens besitzt.
  5. Abdeckung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass das gewölbte Teil (4) die Form einer umgedrehten Seilkurve, d. h. eines hyperbolischen Kosinus, besitzt.
EP08775526A 2007-07-06 2008-07-01 Schutzdeckel für sinterbandvorrichtung mit kontinuierlicher sinterbandspur Active EP2171107B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20075526A FI119773B (fi) 2007-07-06 2007-07-06 Kansi jatkuvatoimisella nauhasintrausradalla varustettua nauhasintrauslaitteistoa varten
PCT/FI2008/050401 WO2009007501A1 (en) 2007-07-06 2008-07-01 Cover for strand sintering equipment provided with a continuous strand sintering track

Publications (3)

Publication Number Publication Date
EP2171107A1 EP2171107A1 (de) 2010-04-07
EP2171107A4 EP2171107A4 (de) 2011-03-02
EP2171107B1 true EP2171107B1 (de) 2012-09-19

Family

ID=38331614

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08775526A Active EP2171107B1 (de) 2007-07-06 2008-07-01 Schutzdeckel für sinterbandvorrichtung mit kontinuierlicher sinterbandspur

Country Status (9)

Country Link
EP (1) EP2171107B1 (de)
CN (1) CN101688266B (de)
AU (1) AU2008274152B2 (de)
BR (1) BRPI0814197B8 (de)
CA (1) CA2692082C (de)
EA (1) EA018232B1 (de)
FI (1) FI119773B (de)
WO (1) WO2009007501A1 (de)
ZA (1) ZA201000804B (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI121927B (fi) * 2009-08-04 2011-06-15 Outotec Oyj Menetelma ja nauhasintrauslaitteisto pelletoidun mineraalimateriaalin jatkuvatoimiseksi sintraamiseksi

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB634871A (en) * 1943-03-31 1950-03-29 Mckee & Co Arthur G Ignition furnace for sintering machines
FI751192A (de) * 1975-04-22 1976-10-23 Ovako Oy
SU662787A1 (ru) * 1977-03-09 1979-05-15 Всесоюзный Научно-Исследовательский И Проектный Институт По Очистке Технологических Газов, Сточных Вод И Использованию Вторичных Энергоресурсов Предприятий Черной Металлургии Укрытие агломерационной машины
JPS6134121A (ja) * 1984-07-26 1986-02-18 Nisshin Steel Co Ltd 焼結機の操業方法
SU1672184A1 (ru) * 1989-03-31 1991-08-23 Кузнецкий металлургический комбинат им.В.И.Ленина Укрытие агломерационной машины

Also Published As

Publication number Publication date
BRPI0814197B1 (pt) 2021-09-21
FI20075526A (fi) 2009-01-07
ZA201000804B (en) 2010-10-27
EA018232B1 (ru) 2013-06-28
AU2008274152A1 (en) 2009-01-15
EA200901664A1 (ru) 2010-08-30
FI20075526A0 (fi) 2007-07-06
FI119773B (fi) 2009-03-13
CN101688266B (zh) 2011-07-13
EP2171107A4 (de) 2011-03-02
CN101688266A (zh) 2010-03-31
EP2171107A1 (de) 2010-04-07
WO2009007501A1 (en) 2009-01-15
CA2692082A1 (en) 2009-01-15
AU2008274152B2 (en) 2012-05-24
CA2692082C (en) 2016-03-29
BRPI0814197B8 (pt) 2023-03-28
BRPI0814197A2 (pt) 2015-01-27

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