EP2171107A1 - Abdeckung für bandsintervorrichtung mit kontinuierlicher bandsinterspur - Google Patents

Abdeckung für bandsintervorrichtung mit kontinuierlicher bandsinterspur

Info

Publication number
EP2171107A1
EP2171107A1 EP08775526A EP08775526A EP2171107A1 EP 2171107 A1 EP2171107 A1 EP 2171107A1 EP 08775526 A EP08775526 A EP 08775526A EP 08775526 A EP08775526 A EP 08775526A EP 2171107 A1 EP2171107 A1 EP 2171107A1
Authority
EP
European Patent Office
Prior art keywords
cover
strand sintering
track
cover according
strand
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
EP08775526A
Other languages
English (en)
French (fr)
Other versions
EP2171107A4 (de
EP2171107B1 (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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=38331614&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP2171107(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
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
Application granted granted Critical
Publication of EP2171107B1 publication Critical patent/EP2171107B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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 the cover 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 sev- eral 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 sin- tering 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.
  • 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 dis- close 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 includes a vaulted part that extends on top of the strand sintering track. Because of the vault structure, the tensile stresses exerted on the cover become small, and mainly compression stresses occur in the vault. Thus, it is possible to obtain a lighter cover than before. Furthermore, any tensile stresses exerted on the refractory lining become smaller than before and the strength of the lining can be improved.
  • the cover includes side walls and a roof that extends between the side walls, the roof including the said vaulted part.
  • the cover in- eludes a metal frame, which in the area of the vaulted part of the cover is arched like a vault and which includes a lower side on the side of the strand sintering track.
  • the refractory lining is supported by a number of anchoring members to the lower side of the metal frame as a vault-like, arched layer.
  • 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 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 fur- ther improves the durability of the lining and the anchor members of the lining.
  • 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.
  • the cover is the cover of the equalizing zone of the strand sintering equipment.
  • Fig. 1 shows schematically a side view of the strand sintering equipment comprising an embodiment of the cover according to the invention
  • Fig. 2 shows the cross section II-II of the strand sintering equipment of Fig. 1,
  • Fig. 3 shows a perspective view of the cover of Fig. 3
  • Fig. 4 shows the section IV-IV of Fig. 3.
  • 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 0 C) , the heating zone (II, a temperature of about 1150 0 C), and the sintering zone (III, a temperature of about 1350 0 C) of the furnace to the stabilizing or equalizing zone (IV) , after which the bed of pellets further travels through a sequen- tial first cooling zone (V, a temperature of about 125O 0 C), second cooling zone (VI, a temperature of about 1150 0 C) and third cooling zone (VII, a temperature of about 400 0 C) .
  • the pellets in the sintered form exit the strand sintering equipment at its tail.
  • 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)
  • Superconductors And Manufacturing Methods Therefor (AREA)
  • Belt Conveyors (AREA)
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 true EP2171107A1 (de) 2010-04-07
EP2171107A4 EP2171107A4 (de) 2011-03-02
EP2171107B1 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

Citations (3)

* 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
US4065111A (en) * 1975-04-22 1977-12-27 Eero Kyto Cover for the ignition carriage in a sintering plant
JPS6134121A (ja) * 1984-07-26 1986-02-18 Nisshin Steel Co Ltd 焼結機の操業方法

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
SU1672184A1 (ru) * 1989-03-31 1991-08-23 Кузнецкий металлургический комбинат им.В.И.Ленина Укрытие агломерационной машины

Patent Citations (3)

* 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
US4065111A (en) * 1975-04-22 1977-12-27 Eero Kyto Cover for the ignition carriage in a sintering plant
JPS6134121A (ja) * 1984-07-26 1986-02-18 Nisshin Steel Co Ltd 焼結機の操業方法

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Week 198009 Thomson Scientific, London, GB; AN 1980-16023C XP002617343, -& SU 662 787 A (FERR METAL EFFL PURIF) 25 May 1979 (1979-05-25) *
DATABASE WPI Week 199242 Thomson Scientific, London, GB; AN 1992-347263 XP002617342, -& SU 1 672 184 A1 (KUZN METAL COMBINE) 23 August 1991 (1991-08-23) *
See also references of WO2009007501A1 *

Also Published As

Publication number Publication date
CN101688266B (zh) 2011-07-13
FI119773B (fi) 2009-03-13
BRPI0814197A2 (pt) 2015-01-27
FI20075526A0 (fi) 2007-07-06
BRPI0814197B1 (pt) 2021-09-21
BRPI0814197B8 (pt) 2023-03-28
EP2171107A4 (de) 2011-03-02
EA018232B1 (ru) 2013-06-28
AU2008274152A1 (en) 2009-01-15
FI20075526A (fi) 2009-01-07
CA2692082A1 (en) 2009-01-15
EA200901664A1 (ru) 2010-08-30
WO2009007501A1 (en) 2009-01-15
EP2171107B1 (de) 2012-09-19
CN101688266A (zh) 2010-03-31
ZA201000804B (en) 2010-10-27
AU2008274152B2 (en) 2012-05-24
CA2692082C (en) 2016-03-29

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