WO2009007501A1 - Cover for strand sintering equipment provided with a continuous strand sintering track - Google Patents
Cover for strand sintering equipment provided with a continuous strand sintering track Download PDFInfo
- Publication number
- WO2009007501A1 WO2009007501A1 PCT/FI2008/050401 FI2008050401W WO2009007501A1 WO 2009007501 A1 WO2009007501 A1 WO 2009007501A1 FI 2008050401 W FI2008050401 W FI 2008050401W WO 2009007501 A1 WO2009007501 A1 WO 2009007501A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cover
- strand sintering
- track
- cover according
- strand
- Prior art date
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 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. 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 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)
- Belt Conveyors (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
- Superconductors And Manufacturing Methods Therefor (AREA)
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EA200901664A EA018232B1 (en) | 2007-07-06 | 2008-07-01 | Cover for strand sintering equipment provided with a continuous strand sintering track |
CN2008800236568A CN101688266B (en) | 2007-07-06 | 2008-07-01 | Cover for strand sintering equipment provided with a continuous strand sintering track |
AU2008274152A AU2008274152B2 (en) | 2007-07-06 | 2008-07-01 | Cover for strand sintering equipment provided with a continuous strand sintering track |
EP08775526A EP2171107B1 (en) | 2007-07-06 | 2008-07-01 | Cover for strand sintering equipment provided with a continuous strand sintering track |
CA2692082A CA2692082C (en) | 2007-07-06 | 2008-07-01 | Cover for strand sintering equipment provided with a continuous strand sintering track |
BRPI0814197A BRPI0814197B8 (en) | 2007-07-06 | 2008-07-01 | COVER FOR WIRE SINTERING EQUIPMENT PROVIDED WITH A CONTINUOUS WIRE SINTERING TRACK |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI20075526 | 2007-07-06 | ||
FI20075526A FI119773B (en) | 2007-07-06 | 2007-07-06 | Cover for continuous belt sintering equipment |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2009007501A1 true WO2009007501A1 (en) | 2009-01-15 |
Family
ID=38331614
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FI2008/050401 WO2009007501A1 (en) | 2007-07-06 | 2008-07-01 | Cover for strand sintering equipment provided with a continuous strand sintering track |
Country Status (9)
Country | Link |
---|---|
EP (1) | EP2171107B1 (en) |
CN (1) | CN101688266B (en) |
AU (1) | AU2008274152B2 (en) |
BR (1) | BRPI0814197B8 (en) |
CA (1) | CA2692082C (en) |
EA (1) | EA018232B1 (en) |
FI (1) | FI119773B (en) |
WO (1) | WO2009007501A1 (en) |
ZA (1) | ZA201000804B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102471823A (en) * | 2009-08-04 | 2012-05-23 | 奥图泰有限公司 | Method and strand sintering equipment for continuous sintering of pelletized mineral material |
Citations (3)
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 |
SU1672184A1 (en) | 1989-03-31 | 1991-08-23 | Кузнецкий металлургический комбинат им.В.И.Ленина | Shed of sintering machine |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SU662787A1 (en) * | 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 | Sintering machine shelter |
JPS6134121A (en) * | 1984-07-26 | 1986-02-18 | Nisshin Steel Co Ltd | Method for operating sintering apparatus |
-
2007
- 2007-07-06 FI FI20075526A patent/FI119773B/en active IP Right Grant
-
2008
- 2008-07-01 EP EP08775526A patent/EP2171107B1/en active Active
- 2008-07-01 BR BRPI0814197A patent/BRPI0814197B8/en active IP Right Grant
- 2008-07-01 AU AU2008274152A patent/AU2008274152B2/en not_active Ceased
- 2008-07-01 CN CN2008800236568A patent/CN101688266B/en active Active
- 2008-07-01 CA CA2692082A patent/CA2692082C/en active Active
- 2008-07-01 EA EA200901664A patent/EA018232B1/en not_active IP Right Cessation
- 2008-07-01 WO PCT/FI2008/050401 patent/WO2009007501A1/en active Application Filing
-
2010
- 2010-02-03 ZA ZA201000804A patent/ZA201000804B/en unknown
Patent Citations (3)
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 |
SU1672184A1 (en) | 1989-03-31 | 1991-08-23 | Кузнецкий металлургический комбинат им.В.И.Ленина | Shed of sintering machine |
Non-Patent Citations (1)
Title |
---|
See also references of EP2171107A4 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102471823A (en) * | 2009-08-04 | 2012-05-23 | 奥图泰有限公司 | Method and strand sintering equipment for continuous sintering of pelletized mineral material |
CN102471823B (en) * | 2009-08-04 | 2014-06-04 | 奥图泰有限公司 | Method and strand sintering equipment for continuous sintering of pelletized mineral material |
Also Published As
Publication number | Publication date |
---|---|
BRPI0814197A2 (en) | 2015-01-27 |
BRPI0814197B1 (en) | 2021-09-21 |
CA2692082A1 (en) | 2009-01-15 |
BRPI0814197B8 (en) | 2023-03-28 |
CN101688266A (en) | 2010-03-31 |
EP2171107A1 (en) | 2010-04-07 |
FI119773B (en) | 2009-03-13 |
EP2171107B1 (en) | 2012-09-19 |
ZA201000804B (en) | 2010-10-27 |
EA200901664A1 (en) | 2010-08-30 |
EP2171107A4 (en) | 2011-03-02 |
AU2008274152A1 (en) | 2009-01-15 |
AU2008274152B2 (en) | 2012-05-24 |
FI20075526A0 (en) | 2007-07-06 |
CN101688266B (en) | 2011-07-13 |
CA2692082C (en) | 2016-03-29 |
EA018232B1 (en) | 2013-06-28 |
FI20075526A (en) | 2009-01-07 |
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