EP1692061B1 - Verfahren und vorrichtung zur auskleidung eines metallurgischen gefässes - Google Patents

Verfahren und vorrichtung zur auskleidung eines metallurgischen gefässes Download PDF

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Publication number
EP1692061B1
EP1692061B1 EP04767062A EP04767062A EP1692061B1 EP 1692061 B1 EP1692061 B1 EP 1692061B1 EP 04767062 A EP04767062 A EP 04767062A EP 04767062 A EP04767062 A EP 04767062A EP 1692061 B1 EP1692061 B1 EP 1692061B1
Authority
EP
European Patent Office
Prior art keywords
screw conveyor
space
conveyor device
lining
openings
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
Application number
EP04767062A
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English (en)
French (fr)
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EP1692061A1 (de
Inventor
Aatos VÄHÄKANGAS
Kyösti Ruotanen
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.)
Bet-Ker Oy
Bet Ker Oy
Original Assignee
Bet-Ker Oy
Bet Ker Oy
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Publication date
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Publication of EP1692061A1 publication Critical patent/EP1692061A1/de
Application granted granted Critical
Publication of EP1692061B1 publication Critical patent/EP1692061B1/de
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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
    • F27D1/16—Making or repairing linings increasing the durability of linings or breaking away linings
    • F27D1/1626—Making linings by compacting a refractory mass in the space defined by a backing mould or pattern and the furnace wall
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/02—Linings
    • B22D41/023—Apparatus used for making or repairing linings

Definitions

  • the invention is related to a method and device for lining a metallurgical vessel by installing a lining material between a form and the inner wall of the vessel.
  • the carrier medium for solid particles is a gas mixture, normally air.
  • Earth-moist or semidry masses include both liquid and gas mixture as a carrier medium.
  • the amount and properties of the used carrier medium are to large extent controlling the rheological behavior of a lining material in particle form. The rheological behavior of dry masses is affected remarkably by circumstances, too.
  • a dry mass and water are mixed first to homogeneous mass, and the wet mass is transferred into the space formed with a form by means of a screw conveyor with the output at one end ( US 5368459 ), belt conveyor, container or a hose pressurized in any suitable way.
  • the screw or belt conveyor, container or the end of the hose is moved during the lining job for delivering mass to every place between the form and the surface to be lined.
  • the mass is self-compacting or compacted by vibrating.
  • Methods suitable for installing dry masses are used for installing heat insulating coatings of intermediate vessels, especially.
  • the dry mass may be transferred into the space between the form and the surface to be lined e.g. by means of pressurized air ( FI 820412 ).
  • Another method is to let the mass run or drop the mass ( US 6280664 ) into its place by means of a big bag or a valve at the bottom of a container or one or more outlets extending from the bottom.
  • the end of the outlet may be located at the top level of the object to be lined, and the outlet and the mass supply are moved horizontally according to need.
  • the outlets may be extended to the bottom of the space to be lined as the lining is started whereby the outlets and the mass supply are raised as the lining is going on and the mass is flowing into the space with a short free fall ( US 4534730 ).
  • US 5058776 presents a radially extending rotatable feeder for dispensing particulate lining material into the space between a form and the wall of a foundry furnace.
  • a dry mass may be installed also with conventional mass conveying devices, like screw or belt conveyors, whereby the mass is discharged into the space to be lined from the end of the screw conveyor or belt.
  • mass conveying devices like screw or belt conveyors, whereby the mass is discharged into the space to be lined from the end of the screw conveyor or belt.
  • This kind of solution needs normally a mechanism for moving the conveyor.
  • the method according to the invention of lining a metallurgical vessel by installing a lining material into the upwards open space between a form and the inner wall of the vessel comprising feeding lining material into said space by means of a screw conveyor device is characterized in that which is defined in claim 1.
  • Various embodiments of the method are defined in claims 2 to 4.
  • the device according to the invention for lining a metallurgical vessel by installing a lining material into the upwards open space between a form and the inner wall of the vessel comprising a screw conveyor device for feeding lining material into said space is characterized in that which is defined in claim 5.
  • Various embodiments of the device are defined in claims 6 to 12.
  • the solution of the invention is very suitable for installation of dry lining masses, for example.
  • the properties and operation of the screw conveyor device and the openings at the bottom of it may be varied in many ways, the solution may be applied widely for installing different kind of materials.
  • a form 8 is installed in a vessel 7 whereby a space 9 remains between the form and the inner wall of the vessel to be lined.
  • the lining work advancing, the space 9 is filled with refractory material M.
  • the vessel to be lined comprises typically a jacket 7 and a background lining 13 ( Fig. 4 ).
  • the device of Figs. 1 to 4 includes a frame Ion which the device is supported above the vessel 7 provided with the form 8 so that screw conveyor devices 3a, 3b, 3c and 3d extend above the upwards open space 9 along it and in the close vicinity to it.
  • the screw conveyor devices 3a and 3b and, respectively, 3c and 3d extend at the both sides of the vessel 7 on essentially the whole length of it.
  • Guide plates 12a, 12c etc., respectively, have been attached at the sides of the openings for conducting material M better into the space 9 and for reducing dusting.
  • a hopper 2 comprises four parts 2a, 2b, 2c and 2d for conducting the material through corresponding outlets 4a, 4b, 4c and 4d into the corresponding screws 3a, 3b, 3c and 3d.
  • the outlets are provided with valves 11a, 11b etc., respectively.
  • the screws 5a, 5b, 5c and 5d of the screw conveyor devices are driven by electric motors 10a, 10b, 10c and 10d, respectively.
  • Fig. 2 demonstrates the operation of the method and the device. The aim is that material is fed into the space 9 evenly on the whole length of the screws.
  • the lining structure begins to be made up from that end of the screw conveyor at which the mass is brought into the screw conveyor.
  • the filling of the space to be lined under the screw conveyor is starting from one end of the device and is advancing towards the other end. Then, some segregation may be produced in the lining structure which may weaken the strength of the lining. Therefore, it may be necessary to adjust the transfer speed of the material in the screw casing in the longitudinal direction as is indicated by arrows S1, S2 and S3 in Fig. 5 , in the example of which the opening 6 at the bottom of the screw conveying device is even in width.
  • a bigger transfer speed at the beginning of the screw conveyor device causes that more material is transferred to the other end of the device and discharged there which makes the feeding of the material into the space to be filled more even along the length of the device.
  • the discharging speed of the material may be made uniform or it may be adjusted on the whole length of the screw conveyor device also e.g. so that the opening 6' at the bottom of the screw conveyor device is widening from the beginning to the end of the device ( Fig. 6 ). The same may be made so that there are several openings 6j, 6k, 6l, 6m and 6n and that the length and/or width of them is increasing from the beginning to the end of the device ( Fig. 7 ).
  • a solution is to use a netting 14 in the opening 6 the mesh size of which is at the beginning of the device 3 smaller than at the end ( Fig. 8 ).
  • Fig. 9 describes schematically a solution in which at the bottom of or under the screw conveyor device there is a mechanism 15 in connection with the opening 6, e.g. an angle iron or a trough extending longitudinally along the device by means of which discharging speed of the material may be adjusted at any place in the longitudinal direction of the device.
  • a mechanism 15 in connection with the opening 6, e.g. an angle iron or a trough extending longitudinally along the device by means of which discharging speed of the material may be adjusted at any place in the longitudinal direction of the device.
  • the material may be fed into the screw conveyor device in a conventional way through an inlet or opening (11a, 11b and 11c in Figs. 2 to 4 and 11 in Figs. 9 and 10 ) at one end of the device.
  • the screw may be a normal spiral screw, and for adjusting the transfer speed the pitch of the screw may vary. According to the need, the properties of the screw may be varied widely also otherwise.
  • screw conveyor device means here generally a device in which material may be transferred longitudinally in a tube or similar device by means of a screw-like organ.
  • the screw conveyor device may be a conventional screw conveyor meant for transferring materal brought into one end of the conveyor into the other end and discharging it there.
  • the screw conveyor device which is the basic device in the present solution, may vary in many ways so that the material transfer efficiency and speed and also transfer direction vary along the length of the device.
  • Material may of course be brought into the screw conveyor device at several places along the length of the device or e.g. at the middle, and the screw may be accomplished so that it transfers material in different directions at different places.
  • the method and device of the invention may include also other special features making a lining work easier or faster and features improving working hygiene.
  • there may be a limit switch in the device by means of which the screw is stopped automatically as the space to be lined is filled.
  • Fig. 10 presents a further example of the device of the invention.
  • an intermediate vessel has often a rectangular form in plan.
  • the screw conveyor device 3 is placed above the top opening of the space 9 to be filled at the longer side of the vessel 7. So that also the shorter end side of the vessel would be filled as well as possible, the structure of the screw conveyor device is added with extensions 3m and 3n at the end sides of the vessel, respectively, whereby the space to be lined is filled also at the ends of the vessel.
  • 2 to 4 screw conveyor devices and a mass storage hopper may form a unit the components of which may be fixed together.
  • the unit may be movable or installed steadily and also automatically controlled for reducing need of manpower.
  • Refractory material which is to be portioned out into the object may include gas mixture as a carrier medium already in a storage hopper whereby different kinds of refractory materials, like dry masses, casting masses or semidry masses may be installed by the method and device of the invention.
  • the input end of the device of the invention may be provided with an inlet for portioning liquid phase into the mass. Then, the need of mixing liquid phase into the essentially dry mass coming from the storage hopper into the screw conveyor device is taken into account in the realization of the structure of the screw.
  • the solution of the invention may be used also with intermediate vessels for making background linings and insulating coatings.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Screw Conveyors (AREA)
  • Treatment Of Steel In Its Molten State (AREA)

Claims (11)

  1. Methode zum Füttern eines metallurgischen Gefäßes, indem das Futtermaterial in den nach oben offenen Raum (9) zwischen der Form und der Innenwand des Gefäßes installiert wird, einschließlich einer Schraubenfördervorrichtung zur Speisung des Futtermaterials in den genannten Raum (9), dadurch gekennzeichnet, dass:
    die Schraubenfördervorrichtung (3, 3a, 3b, 3c, 3d) in der Längsrichtung an der oberen Öffnung des Raums (9) entlang in deren unmittelbaren Nähe platziert wird,
    der Boden der Schraubenfördervorrichtung mit einer oder mehreren Öffnungen (6, 6a, 6b, 6c, 6d, 6', 6j, 6k, 6l, 6m, 6n), die sich wesentlich auf die gesamte Länge der Schraubenfördervorrichtung erstrecken, ausgerüstet wird und
    das Futtermaterial in die Schraubenfördervorrichtung gebracht wird, in der es in der Längsrichtung transportiert wird und gleichzeitig durch die genannten Öffnungen wesentlich mit der gesamten Länge in den genannten Raum (9) gespeist wird.
  2. Methode gemäß Anspruch 1, dadurch gekennzeichnet, dass die Speisung in den genannten Raum reguliert wird, um sie in der Längsrichtung der Fördervorrichtung (3, 3a, 3b, 3c, 3d) gleichmäßig zu bekommen.
  3. Methode gemäß Anspruch 2, dadurch gekennzeichnet, dass die Speisung durch Ändern der Abmessungen der genannten Öffnung oder Öffnungen (6', 6j, 6k, 6l, 6m, 6n) im Verhältnis der Lage in der Längsrichtung der Öffnung reguliert wird.
  4. Methode gemäß Anspruch 2, dadurch gekennzeichnet, dass die Speisung durch Ändern der Transportleistung (S1, S2, S3) der Schraubenfördervorrichtung (3) Verhältnis der Lage in der Längsrichtung reguliert wird.
  5. Vorrichtung zum Füttern eines metallurgischen Gefäßes, indem das Futtermaterial in den nach oben offenen Raum (9) zwischen der Form und der Innenwand des Gefäßes installiert wird, einschließlich einer Schraubenfördervorrichtung zur Speisung des Futtermaterials in den genannten Raum (9), dadurch gekennzeichnet, dass:
    die Schraubenfördervorrichtung (3, 3a, 3b, 3c, 3d) ist so arrangiert, dass sie sich in der Längsrichtung an der oberen Öffnung des Raums (9) entlang in deren unmittelbaren Nähe erstreckt und
    der Boden der Schraubenfördervorrichtung mit einer oder mehreren Öffnungen (6, 6a, 6b, 6c, 6d, 6', 6j, 6k, 6l, 6m, 6n) ausgerüstet ist, die sich wesentlich auf die gesamte Länge des Bodens erstrecken, um das Futtermaterial in die Schraubenfördervorrichtung zu bringen und um das Material in der Längsrichtung zu transportieren und gleichzeitig durch die genannten Öffnungen wesentlich mit der gesamten Länge der Vorrichtung in den genannten Raum (9) zu speisen.
  6. Vorrichtung gemäß Anspruch 5, dadurch gekennzeichnet, dass die Öffnung (6) gleichmäßig breit ist.
  7. Vorrichtung gemäß Anspruch 5, dadurch gekennzeichnet, dass die Öffnung (6') von der Eintrittstelle des Materials weg weiter wird.
  8. Vorrichtung gemäß Anspruch 5, dadurch gekennzeichnet, dass der Boden mehrere hintereinander liegende Öffnungen (6j, 6k, 6l, 6m, 6n) hat, die weiter und / oder länger von der Eintrittstelle des Materials weg werden.
  9. Vorrichtung gemäß Anspruch 5, dadurch gekennzeichnet, dass die Öffnung (6) mit einem Netz (14) ausgerüstet ist, dessen Massengröße von der Eintrittstelle des Materials weg größer wird.
  10. Vorrichtung gemäß Anspruch 5, dadurch gekennzeichnet, dass die Öffnung (6) mit einer Vorrichtung (15) ausgerüstet ist, die sich in der Längsrichtung der Schraubenfördervorrichtung (3) befindet, um die Austrittgeschwindigkeit des Material zu regulieren.
  11. Vorrichtung gemäß Anspruch 5, dadurch gekennzeichnet, dass die Schraubenfördervorrichtung (5) eine Spiralschraube enthält.
EP04767062A 2003-09-18 2004-09-20 Verfahren und vorrichtung zur auskleidung eines metallurgischen gefässes Not-in-force EP1692061B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20031342A FI117279B (fi) 2003-09-18 2003-09-18 Menetelmä ja laite metallurgisen astian vuoraamiseksi
PCT/FI2004/000548 WO2005026024A1 (en) 2003-09-18 2004-09-20 Method and device for lining a metallurgical vessel

Publications (2)

Publication Number Publication Date
EP1692061A1 EP1692061A1 (de) 2006-08-23
EP1692061B1 true EP1692061B1 (de) 2008-05-14

Family

ID=27839005

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04767062A Not-in-force EP1692061B1 (de) 2003-09-18 2004-09-20 Verfahren und vorrichtung zur auskleidung eines metallurgischen gefässes

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EP (1) EP1692061B1 (de)
AT (1) ATE395283T1 (de)
DE (1) DE602004013828D1 (de)
FI (1) FI117279B (de)
WO (1) WO2005026024A1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2021466B1 (de) * 2006-04-30 2012-08-29 Feed Research Institute Chinese Academy of Agricultural Sciences Klonierung und expression einer neuen phytase
CN101020334B (zh) * 2006-12-31 2011-01-05 西安重型机械研究所 中间包耐火衬整体浇灌系统

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4421697A (en) * 1981-05-15 1983-12-20 Nippon Kokan Kabushiki Kaisha Method and apparatus for casting an inner lining amorphous refractory into a molten metal vessel
US5368459A (en) * 1992-03-05 1994-11-29 Veitscher Magnesitwerke-Actien-Gesellschaft Device for preparing and feeding a monolithic ceramic mass into a metallurgical melting vessel

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3964892A (en) * 1975-05-12 1976-06-22 Ferro Corporation Apparatus for advancing particulate material
AT361150B (de) * 1979-02-20 1981-02-25 Frings Hermann H Vorrichtung zum auskleiden von gefaessen der metallurgie mit stampfmassen
US5058776A (en) * 1990-03-09 1991-10-22 General Motors Of Canada Limited Apparatus for dispensing particulate material for foundry furnace relining
US5101961A (en) * 1991-08-16 1992-04-07 Jenike & Johanson, Inc. Feeding screw

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4421697A (en) * 1981-05-15 1983-12-20 Nippon Kokan Kabushiki Kaisha Method and apparatus for casting an inner lining amorphous refractory into a molten metal vessel
US5368459A (en) * 1992-03-05 1994-11-29 Veitscher Magnesitwerke-Actien-Gesellschaft Device for preparing and feeding a monolithic ceramic mass into a metallurgical melting vessel

Also Published As

Publication number Publication date
FI117279B (fi) 2006-08-31
EP1692061A1 (de) 2006-08-23
FI20031342A (fi) 2005-03-19
FI20031342A0 (fi) 2003-09-18
WO2005026024A1 (en) 2005-03-24
DE602004013828D1 (de) 2008-06-26
ATE395283T1 (de) 2008-05-15

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