EP2281165B1 - Method for manufacturing a cooling plate for a metallurgical furnace - Google Patents
Method for manufacturing a cooling plate for a metallurgical furnace Download PDFInfo
- Publication number
- EP2281165B1 EP2281165B1 EP09757363A EP09757363A EP2281165B1 EP 2281165 B1 EP2281165 B1 EP 2281165B1 EP 09757363 A EP09757363 A EP 09757363A EP 09757363 A EP09757363 A EP 09757363A EP 2281165 B1 EP2281165 B1 EP 2281165B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- slab
- edge
- cooling channel
- cooling
- blind borehole
- 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.)
- Not-in-force
Links
Images
Classifications
-
- 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
- F27D1/12—Casings; Linings; Walls; Roofs incorporating cooling arrangements
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/10—Cooling; Devices 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
-
- 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
- F27D2009/0045—Cooling of furnaces the cooling medium passing a block, e.g. metallic
- F27D2009/0048—Cooling of furnaces the cooling medium passing a block, e.g. metallic incorporating conduits for the medium
-
- 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
- F27D2009/0056—Use of high thermoconductive elements
- F27D2009/0062—Use of high thermoconductive elements made from copper or copper alloy
Definitions
- the present invention generally relates to a method for manufacturing a cooling plate for a metallurgical furnace.
- Such cooling plates for a metallurgical furnace are well known in the art. They are used to cover the inner wall of the outer shell of the metallurgical furnace, as e.g. a blast furnace or electric arc furnace, to provide: (1) a heat evacuating protection screen between the interior of the furnace and the outer furnace shell; and (2) an anchoring means for a refractory brick lining, a refractory guniting or a process generated accretion layer inside the furnace.
- the cooling plates have been cast iron plates with cooling pipes cast therein.
- copper staves have been developed.
- most cooling plates for a metallurgical furnace are made of copper, a copper alloy or, more recently, of steel.
- a cooling plate made from a forged or rolled copper slab is known from DE 2 907 511 C2 .
- the coolant channels are blind boreholes introduced by deep drilling the rolled copper slab.
- the blind boreholes are sealed off by welding in plugs.
- connecting bores are drilled from the rear side of the plate body into the blind boreholes.
- connection pipe-ends for the coolant feed or coolant return are inserted into these connecting bores and welded to the stave body.
- a method for manufacturing a cooling plate for a metallurgical furnace in accordance with the present invention comprises the steps of providing a slab of metallic material, the slab having a front face, an opposite rear face and four side edges; and providing the slab with at least one cooling channel by drilling at least one blind borehole into the slab, wherein the blind borehole is drilled from a first edge towards an opposite second edge.
- the method comprises the further steps of deforming the slab in such a way that a first edge region of the slab is at least partially bent towards the rear face of the slab; and machining excess material from the front and rear faces of the slab to produce a cooling plate having a panel-like body wherein an opening to the cooling channel is located in the rear face.
- the opening to the cooling channel is located in the rear face.
- the absence of the plug provides a more reliant cooling plate. Indeed, as the cooling plate is exposed to considerable mechanical and thermal stress, in particular in the edge regions of the cooling plate, the plug has to be considered as a weak point. If the weld of the plug deteriorates, fluid tightness of the cooling channel can no longer be guaranteed and coolant could leak from the cooling channel into the furnace. Such leakage of coolant fluid into the furnace should however be avoided at all cost as it may lead to a significant risk of explosion. As no such plug is welded to the cooling plate manufactured according to the method of present invention, the risk of a leakage occurring through such a plug is avoided. Furthermore, the cooling plate manufactured according to the method of present invention also presents a more important material thickness on the front face in the first edge region, as compared to cooling plates manufactured according prior art methods. The increased material thickness also contributed to a longer lifetime of the cooling plate.
- the method comprises the additional step of forming grooves and intermittent lamellar ribs in the front face of the panel-like body for anchoring a refractory brick lining.
- the grooves are advantageously formed with a width that is narrower at an inlet of the groove than at a base of the groove.
- the grooves may e.g. be formed with dovetail cross-section.
- the method comprises the additional step of providing a connection pipe for each cooling channel formed in the panel-like body; aligning one end of each connection pipe with an opening to the respective cooling channel arranged in the rear face of the panel-like body; and connecting the connection pipes to the rear face of the panel-like body so as to create a fluid connection between each connection pipe and its associated cooling channel.
- An adapter may be arranged between the panel-like body and the connection pipe, the adapter having the form of a hollow truncated cone.
- the smaller base of the adapter may have a diameter adapted for connection to the connection pipe.
- the larger base of the adapter is dimensioned so as to cover the whole opening of the cooling channel in the rear face. Indeed, due to the bending of the cooling channel and the subsequent machining of the rear face, the cooling channel may have an elongated opening in the rear face.
- the larger base of the adapter allows to ensure that a leakage at the rear face of the cooling plate can be avoided.
- the rear face of the panel-like body, the connection pipe and, if applicable, the adapter are connected together through soldering or welding.
- the method comprises the steps of providing the slab with a first cooling channel by drilling a first blind borehole into the slab, wherein the first blind borehole is drilled from the first edge towards the second edge; and providing the slab with a second cooling channel by drilling a second blind borehole into the slab, wherein the second blind borehole is drilled from the first edge towards the second edge.
- the first and second cooling channels are arranged in such a way that their ends in a second edge region meet and form a fluid communication between the first and second cooling channels.
- the first and second blind boreholes are both drilled from the first edge towards the second edge at an angle with respect to each other, in such a way that their ends meet in the second edge region.
- the resulting first and second cooling channels thereby form a combined "V"-shaped cooling channel, wherein coolant flows through one of the cooling channels towards the second edge region and then, through the other one of the cooling channels, back to the first edge region.
- Such a "V"-shaped cooling channel allows both the inlet connection pipe and the outlet connection pipe to be arranged in the first edge region.
- the method comprises the steps of providing the slab with a first cooling channel by drilling a first blind borehole into the slab, wherein the first blind borehole is drilled from the first edge towards the second edge; and providing the slab with a second cooling channel by drilling a second blind borehole into the slab, wherein the second blind borehole is drilled from the second edge towards the first edge.
- the first and second cooling channels are arranged in such a way that their ends meet and form a fluid communication between the first and second cooling channels.
- the first and second blind boreholes are drilled from opposite edges towards a central region of the slab, in such a way that their ends meet in the central region.
- the resulting first and second cooling channels thereby form a combined cooling channel extending from the first edge to the second edge.
- blind boreholes can only be drilled up to a particular depth. If the cooling channel is to exceed this depth, a second blind borehole is generally drilled from the opposite side.
- both the first edge region and the second edge region are bent towards the rear face before removing excess material from the slab. Two cooling channel openings are thereby formed in the rear face without resorting to the necessity to provide plugs at either end of the cooling channel.
- the method comprises the steps of providing the slab with a first cooling channel by drilling a first blind borehole into the slab, wherein the first blind borehole is drilled from the first edge towards the second edge, wherein an end of the first blind borehole is arranged in a second edge region of the slab; and, in the second edge region, drilling a connecting bore extending from the rear face of the slab to the end of the first blind borehole and forming a fluid communication between the first cooling channel and the connecting bore.
- the slab In the first edge region, the slab is bent towards the rear face and an opening to the cooling channel is thereby formed in the rear face.
- a connecting bore is provided for forming second opening to the cooling channel. The formation of this second opening to the cooling channel essentially corresponds the method used in the prior art methods.
- This embodiment is adapted for connecting an inlet connection pipe in the first edge region and an outlet connection pipe in the second edge region.
- the cooling plate is made of at least one of the following materials: copper, a copper alloy or steel.
- Cooling plates are used to cover the inner wall of an outer shell of a metallurgical furnace, as e.g. a blast furnace or electric arc furnace.
- the object of such cooling plates is to form: (1) a heat evacuating protection screen between the interior of the furnace and the outer furnace shell; and (2) an anchoring means for a refractory brick lining, a refractory guniting or a process generated accretion layer inside the furnace.
- the cooling plate 10 is formed from a slab 11 e.g. made of a cast or forged body of copper, a copper alloy or steel into a panel-like body 12.
- This panel-like body 12 which is more closely described by referring to Fig.4 has a front face 14, also referred to as hot face, which will be facing the interior of the furnace, and a rear face 16, also referred to as cold face, which will be facing the inner surface of the furnace wall.
- the panel-like body 12 generally has the form of a quadrilateral with a pair of long edges (not shown) and a pair of short first and second edges 22, 24.
- cooling plates have a width in the range of 600 to 1300 mm and a height in the range of 1000 to 4200 mm. It will however be understood that the height and width of the cooling plate may be adapted, amongst others, to structural conditions of a metallurgical furnace and to constraints resulting from their fabrication process.
- the cooling plate 10 further comprises connection pipes 26, 28 for a cooling fluid, generally water. These connection pipes 26, 28 are connected from the rear side of the panel-like body 12 to cooling channels 30 arranged within the panel-like body 12. As seen in Fig. 4 , these cooling channels 30 extend through the panel-like body 12 in proximity of the rear face 16. According to the proposed method of manufacturing, which will be described in further detail below, such cooling channels 30 are formed by drilling. Each cooling channel 30 is normally provided with an appropriate inlet connection pipe 26, through which the cooling fluid is fed into the cooling channel 30, and/or outlet connection pipe 28, through which the cooling fluid leaves the cooling channel 30.
- the front face 14 is subdivided by means of grooves 32 into lamellar ribs 34.
- the grooves 32 laterally delimiting the lamellar ribs 34, may be milled into the front face 14 of the panel-like body 12.
- the lamellar ribs 34 extend parallel to the first and second edges 22, 24, from a first long edge (not shown) to a second long edge (not shown) of the panel-like body 12. They are perpendicular to the cooling channels 30 in the panel-like body 12.
- the grooves 32 and lamellar ribs 34 are arranged horizontally. They form anchorage means for anchoring a refractory brick lining, a refractory guniting or a process generated accretion layer to the front face 14.
- the grooves 32 have a dovetail (or swallowtail) cross-section, i.e. the inlet width of a groove 32 is narrower than the width at its base.
- the mean width of a lamellar rib 34 is preferably smaller than the mean width of a groove 32. Typical values for the mean width of a groove 32 are e.g. in the range of 40 mm to 100 mm. Typical values for the mean width of a lamellar rib 34 are e.g. in the range of 20 mm to 40 mm.
- the height of the lamellar ribs 34 (which corresponds to the depth of the grooves 32) represents generally between 20% and 40% of the total thickness of the panel-like body 12.
- a slab 11 e.g. made of a cast or forged body of copper, a copper alloy or steel is provided.
- a slab has a generally quadrilateral form with a front face 14, rear face 16, a pair of long edges (not shown) and a pair of short first and second edges 22, 24.
- the slab 11 has dimensions exceeding the desired dimensions of the panel-like body 12.
- At least one blind borehole 40 is drilled from the first edge 22 into the slab 11 and extends to a second edge region 42.
- the blind borehole 40 has an end 44 arranged in the second edge region 42.
- the slab 11 is deformed in such a way that a first edge region 46 is bent towards the rear face 16 of the slab 11. This results in a corresponding bending of the blind borehole 40.
- the bending angle ⁇ between a central axis 50 of the unbent blind borehole 40 and a central axis 52 of the blind borehole 40 at the first edge 22 may be between 30 and 45 degrees. This bending angle ⁇ should however not be understood as limiting.
- the bending angle ⁇ may e.g. vary considerably depending on the thickness of the slab 11 or the diameter of the blind borehole 40.
- the resulting panel-like body 12 shown in Fig.3 , is again of a generally quadrilateral form with a front face 14, rear face 16, a pair of long edges (not shown) and a pair of short first and second edges 22, 24.
- a cooling channel 30, formed by the blind borehole 40, is formed in the panel-like body 12 generally parallel to the rear face 16. In the first edge region 46, the cooling channel 30 is bent and opens up into the rear face 16.
- the panel-like body 12 can be provided with a bore 60 in the second edge region 42, extending from the cooling channel 30 to the rear face 16.
- the resulting panel-like body 12 is further subjected to a milling step, wherein grooves 32 and intermittent lamellar ribs 34 are formed in the front face 14 of the panel-like body 12.
- these grooves 32 and ribs 34 form anchorage means for anchoring a refractory brick lining, a refractory guniting or a process generated accretion layer to the front face 14 of the cooling plate 10.
- connection pipes 26, 28 are connected to the rear face 16 of the panel-like body 12.
- An inlet connection pipe 26 is fluidly connected to the opening of the cooling channel 30 in the first edge region 46 for feeding cooling fluid into the cooling channel 30.
- An outlet connection pipe 28 is fluidly connected to the bore 60 in the second edge region 42 for evacuating cooling fluid from the cooling channel 30.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
- Blast Furnaces (AREA)
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
LU91453A LU91453B1 (en) | 2008-06-06 | 2008-06-06 | Method for manufacturing a cooling plate for a metallurgical furnace |
PCT/EP2009/054937 WO2009146980A1 (en) | 2008-06-06 | 2009-04-24 | Method for manufacturing a cooling plate for a metallurgical furnace |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2281165A1 EP2281165A1 (en) | 2011-02-09 |
EP2281165B1 true EP2281165B1 (en) | 2012-12-05 |
Family
ID=39734444
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09757363A Not-in-force EP2281165B1 (en) | 2008-06-06 | 2009-04-24 | Method for manufacturing a cooling plate for a metallurgical furnace |
Country Status (11)
Country | Link |
---|---|
US (1) | US20110079068A1 (ko) |
EP (1) | EP2281165B1 (ko) |
KR (1) | KR20110020898A (ko) |
CN (1) | CN102047060A (ko) |
CA (1) | CA2723078A1 (ko) |
ES (1) | ES2399609T3 (ko) |
LU (1) | LU91453B1 (ko) |
MX (1) | MX2010013286A (ko) |
RU (1) | RU2480696C2 (ko) |
UA (1) | UA100565C2 (ko) |
WO (1) | WO2009146980A1 (ko) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FI122005B (fi) * | 2008-06-30 | 2011-07-15 | Outotec Oyj | Menetelmä jäähdytyselementin valmistamiseksi ja jäähdytyselementti |
LU100073B1 (en) * | 2017-02-09 | 2018-10-02 | Wurth Paul Sa | Cooling Plate for Metallurgical Furnace |
LU100107B1 (en) * | 2017-02-22 | 2018-10-02 | Wurth Paul Sa | Cooling Panel for Metallurgical Furnace |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2907511C2 (de) * | 1979-02-26 | 1986-03-20 | Kabel- und Metallwerke Gutehoffnungshütte AG, 3000 Hannover | Kühlplatte für Schachtöfen, insbesondere Hochöfen, und Verfahren zur Herstellung derselben |
US4300381A (en) * | 1980-08-15 | 1981-11-17 | Riken Corporation | Method for producing insert for diesel engine combustion chamber |
US4768369A (en) * | 1987-11-13 | 1988-09-06 | Johnson Russell H | Method of forming a pipe fitting |
JP3309344B2 (ja) * | 1993-05-26 | 2002-07-29 | 日鍛バルブ株式会社 | センタ穴付き歯車の製造方法 |
JPH09227913A (ja) * | 1996-02-16 | 1997-09-02 | Nippon Steel Corp | 高炉用ステーブクーラー |
TW340137B (en) * | 1996-07-09 | 1998-09-11 | Nippon Steel Corp | Stave for cooling blast furnace wall method for production thereof |
US5730812A (en) * | 1997-05-19 | 1998-03-24 | D-M-E Company | Method of manufacturing ejector pin sleeves |
DE19801425C2 (de) * | 1998-01-16 | 2000-08-10 | Sms Demag Ag | Kühlplatte für Schachtöfen |
LU90328B1 (de) * | 1998-12-16 | 2003-06-26 | Paul Wutrh S A | Kuehlplatte fuer einen Ofen zur Eisen- oder Stahlerzeugung |
DE10024587A1 (de) * | 2000-05-19 | 2001-11-22 | Km Europa Metal Ag | Kühlplatte |
US6280681B1 (en) * | 2000-06-12 | 2001-08-28 | Macrae Allan J. | Furnace-wall cooling block |
JP2002098481A (ja) * | 2000-09-22 | 2002-04-05 | Tobata Seisakusho:Kk | 炉壁冷却板 |
EP1469085A1 (de) * | 2003-04-14 | 2004-10-20 | Paul Wurth S.A. | Ofenwand mit Kühlplatten für einen metallurgischen Ofen |
EP1548133A1 (en) * | 2003-12-03 | 2005-06-29 | Paul Wurth S.A. | Method of manufacturing a cooling plate and a cooling plate manufactured with this method |
JP2006181577A (ja) * | 2004-12-24 | 2006-07-13 | Denso Corp | 高圧配管部品の製造方法および高圧配管部品 |
-
2008
- 2008-06-06 LU LU91453A patent/LU91453B1/en active
-
2009
- 2009-04-24 CN CN2009801192383A patent/CN102047060A/zh active Pending
- 2009-04-24 EP EP09757363A patent/EP2281165B1/en not_active Not-in-force
- 2009-04-24 RU RU2010154510/02A patent/RU2480696C2/ru not_active IP Right Cessation
- 2009-04-24 UA UAA201100086A patent/UA100565C2/ru unknown
- 2009-04-24 MX MX2010013286A patent/MX2010013286A/es not_active Application Discontinuation
- 2009-04-24 ES ES09757363T patent/ES2399609T3/es active Active
- 2009-04-24 KR KR1020117000134A patent/KR20110020898A/ko active IP Right Grant
- 2009-04-24 US US12/995,426 patent/US20110079068A1/en not_active Abandoned
- 2009-04-24 WO PCT/EP2009/054937 patent/WO2009146980A1/en active Application Filing
- 2009-04-24 CA CA2723078A patent/CA2723078A1/en not_active Abandoned
Also Published As
Publication number | Publication date |
---|---|
UA100565C2 (ru) | 2013-01-10 |
CA2723078A1 (en) | 2009-12-10 |
ES2399609T3 (es) | 2013-04-02 |
US20110079068A1 (en) | 2011-04-07 |
KR20110020898A (ko) | 2011-03-03 |
CN102047060A (zh) | 2011-05-04 |
MX2010013286A (es) | 2011-04-27 |
RU2480696C2 (ru) | 2013-04-27 |
WO2009146980A1 (en) | 2009-12-10 |
RU2010154510A (ru) | 2012-07-20 |
LU91453B1 (en) | 2009-12-07 |
EP2281165A1 (en) | 2011-02-09 |
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