WO2011160692A1

WO2011160692A1 - Method and device for scarfing warm and cold workpieces, such as slabs

Info

Publication number: WO2011160692A1
Application number: PCT/EP2010/058956
Authority: WO
Inventors: Horst K. Lotz
Original assignee: Gesellschaft Für Autogenmaschinen Und -Geräte Mbh
Priority date: 2010-06-24
Filing date: 2010-06-24
Publication date: 2011-12-29

Abstract

The invention relates to a device (1) for scarfing warm and cold workpieces (2) such as steel slabs, inside and upstream of continuous casting plants, by means of scarfing burners (5), comprising a line of rollers (6.1) which are arranged in the direction of transport of the workpiece (2), on which the workpiece (2) which is to be scarfed is arranged. An arranging device (7) places the workpiece (2) vertically on one of its long narrow sides and drive rollers (10.1) transporting the workpiece (2) to a scarfing burner frame (4) comprising the scarfing burners (5). Said scarfing burner frame surrounds the workpiece (2) which is to be scarfed. Additional drive rollers (10.2) transport the workpiece (2) after scarfing to a subsequent deposit device (13) for depositing the workpiece (2) on one of its wide sides on an additional line of rollers (6.2). At least one granulating nozzle (14) installed close to the scarfing burner (5) is used to remove by granulation thus produced melted steel and slag, traverse to the vertical.

Description

Method and device for scarfing hot and cold workpieces, such as slabs

description

The invention relates to a method and a device for scarfing of hot and cold Werkstü ^¬ bridges, such as slabs, steel in and after Stranggießan ^¬ lay by flame burners.

In particular slabs, blooms and billets of steel ^¬ the usually conditioned or cleaned by

Flammbrenner along the upper, lower and side surfaces of such a workpiece to be flaked be ^¬ moves to norm deviating microstructures and surface defects, such as cracks, burrs and

Remove slag inclusions. The work ^¬ piece is horizontally flat on one of its broad sides lying to the Flammbrennern and along the Flämmbren ^¬ ner performed. A conventional scarfing device has horizontally aligned upper and possibly lower scarfing units, which are across the width and the

Are mounted end portions of a holder for the same time ^¬ scarfing to the long narrow sides of a workpiece such as a slab, when the work piece is flat passed ^¬ lie quietly between them. If the broad sides of the workpiece are also to be flamed, the workpiece is set up or the holder

pivoted, so that several operations are necessary. A Flämmvorgang is usually characterized eingelei ^¬ tet that initially an edge or stripe on the workpiece surface is heated to Eisenzündtemperatur. The width of the strip is normally equal to the width of the desired flame track. One

Flämmsauerstoffström is then inflated on the preheated strip and there is a Relativbewe ^¬ tion between Flämmsauerstoffström and workpiece.

The disadvantage here is that for scarfing all four sides of the workpiece, namely the long narrow sides and broadsides several operations are necessary and the workpiece must be changed several times, which he ^¬ brings considerable time and transport costs. In addition, spray arising during casting Zun ^¬ of, when scarfing Melted steel and slag in an uncontrolled manner in the working area around and sit down partly again on the surface of the workpiece to flämmenden or other parts of the device scarfing machine, in particular at the Flämmbrennern from.

It is an object of the invention to provide a method and apparatus for scarfing of hot and cold Werkstü ^¬ CKEN, such as slabs, made of steel during and after Stranggießan ^¬ were to provide means Flämmbrennern that at a Siche ^¬ res, low-noise and clean scarfing the workpiece allow as little space as possible.

According to the method, the object is achieved in that in a vertical flaming tower with a rigid vertical cal erected Flämmbrennerrahmen, the horizon ^¬ tal fed, on one of its long sides set vertically on all sides, the Flämmbrennerrahmen after firing the upper edges of the workpiece by means of flame burners, which are arranged on all four sides of the Flammbrennerrahmen, the simultaneous flaming at two opposite , that is on all four sides of the workpiece by adding Flämmsauerstoff begins and then transported at a gewähl ^¬ th transport speed, the workpiece through the Flämmbrennerrahmen and flamed while the Flämmbad of molten steel and slag by gravity falls down, the workpiece before lying on a roller table with the scarf on one of his

Narrow sides are set up vertically, while horizontally through the drum by means of driver rollers

Flammbrennerrahmen out and after scrapping by means of a storage device on another roller table is again placed on one of its broadsides.

This scarfing the same time, allows all four Be ^¬ th, namely the long narrow sides and the Breitsei ^¬ th of the workpiece without several Flämmschritte are necessary. It should be noted that other workpieces, such as blocks, billets and such non-rectangular cross-section can be flamed with this method.

The erected vertically in the vertical Flämmturm rigid Flammenbrennerrahmen surrounds with it to ^¬ order Flammbrennern the to be flattened, horizontal The workpiece erected on a long narrow side in the flaming tower and lying on the narrow side circumferentially. The workpiece is scooped by the driver rollers through the scarfing frame at a selected transport speed during scarfing

Flämmgeschwindigkeit determined, proceed.

The to flämmende workpiece such as a slab is brought to an already existing generally in a continuous casting roller to the Flämmmaschine, namely lying flat on one of its broad sides, such as it is transported ^¬ advantage of the continuous casting installation usually. Before scarfing, the workpiece is set up by the positioning device arranged at the roller table by 90 ° on one of its narrow sides, which then rests on the roller table. During further transport of the now lying on a narrow side workpiece towards

Flämmturm the workpiece is guided and moved by the drive rollers to the vertical Flammbrennerrahmen, which encloses the workpiece on all sides. The arranged on all four sides of the Flammbrennerrahmen Flammbrenner are directed to the respective workpiece surface ge ^¬ . Of course, several can

Flammbrenner or sets of Flammbrennern per side of the workpiece to be provided on the Flammbrennerrahmen.

First, the heating of the front workpiece edges in the transport direction takes place by means of the flame burner in the flame burner frame. Then, it is carried out by addition of scarfing oxygen of Flämmvorgang by the workpiece transported by ei ^¬ ner chosen transport velocity through the Flämmbrennerrahmen therethrough and is flamed. Here, the Flämmbad from geschmolze ^¬ nem steel and slag falls by gravity downward. Thus, the molten steel and the Schla ^¬ bridge no longer settle on the workpiece and other surrounding equipment parts, settle and crust.

Passes the workpiece to Flämmbrennerrahmen, subsequent capture driver rolls already geflämmten From ^¬ cut of the workpiece and move it further in the direction of transport to a subsequent further roller table. This is associated with a storage device, which now stores the geflämmte workpiece again on one of its broad sides after completion of the scarfing process.

According to a development of the method, the flame burners in the flame burner frame scarf the workpiece at an angle of preferably about 30 ° to the vertical. This will be an optimal and economical

Flämwinkel the flame burner reaches the workpiece.

Preferably, at least one, preferably the lower flame burner can be pivoted away from and back to the workpiece to be flattened before being heated. As a result of gravity fall dirt and slag when Anhei ^¬ zen zen and flaring the workpiece down. These would thus pollute the lower flame burner, stick and crust. The flame burner is swiveled back to scald it. By Wegschwen ^¬ ken the flame burner considerable cleaning time and effort is saved, which are significant, since in the worst case for each individual workpiece before scarfing the affected flame burner time-, cost- and personnel-consuming would have to be cleaned. Gegebe ^¬ applicable, all flame burner on Flämmbrennerrahmen can be designed pivoted away in order to protect the flame burner va ^¬ riabel from contamination. This can be the case, for example, with workpieces to be flattened with non-rectangular cross section.

It is particularly advantageous if at least one befindli ^¬ surface in the vicinity of the flame burner granulation abgranuliert during the scarfing the resulting molten steel and the slag transversely to the vertical and thus protects deeper device parts. In this case, during the scarfing operation, molten steel and slag from the Flämmbereich transversely weggebla ^¬ sen. The granulated waste may then be in a abge located below or beside the channel Flämmmaschine ^¬ passes.

Further, the vertically erected on one of its Schmalsei ^¬ th workpiece during scarfing is held upright by the support rollers and against falling gesi ^¬ chert. The object of the invention is also achieved by a device located in the transport direction of the work ^¬ piece roller table, on which the workpiece is to be flattened, with an erector for ^¬ Ask the workpiece perpendicular to one of his lan ^¬ conditions narrow sides and drive rollers for transporting of the workpiece to a vertical flaming tower with egg ^¬ nem rigid vertically erected Flämmbrennerrahmen arranged with a plurality on all four sides Neten Flammbrennern, which encloses the vertically erected and to be flattened workpiece on its long narrow ^¬ side, and at least one near the

Flammbrenner installed granulating nozzle for

Abgranulieren emerging molten steel and slag transverse to the vertical, and further Trei ^¬ berrollen for transporting the workpiece to a subsequent storage device for storing the workpiece ^¬ piece on one of its broad sides on another roller table.

In the vertical Flämmturm thus the rigid vertically erected Flämmbrennerrahmen is arranged, which arranged a plurality on all four sides

Flammbrenner has. So on each side of the

Flämmbrennerrahmens a flame burner or, in Depending ^¬ speed of the width of the flämmenden workpiece, on each side of a respective group be arranged from inside court ^¬ Flämmbrennern ended. Conveniently, the flame burner in the flame burner frame at an angle of preferably about 30 ° to the vertical ange ^¬ arranged and directed towards the workpiece to be flattened out.

The Flämmbrennerrahmen is rectangular and has a central opening for passing the workpiece to be flattened. If the plant to flämmende ^¬ piece placed on one of its long narrow sides perpendicular to the roller by means of the set-up device, the Flämmbrennerrahmen surrounds the workpiece with its formed by the frame opening.

Furthermore, at least one near the Flammbrenner installed granulating nozzle for

Granulation of resulting molten steel and slag are provided transversely to the vertical. The

Pelletizing granulating the while scarfing of Werkstü ^¬ ckes slag produced transverse to the movement of Flämmbrennerrahmens supply direction, and while protecting lower-device parts, especially the

Flame burner from contamination.

According to a further embodiment of the solution according to the invention, in each case a support device for maintaining the perpendicular to a long narrow side on ^¬ asked and to be flattened workpiece before and after the Flämmturm is arranged and preferably consists of Zwal zen.

According to a further embodiment of the device, the support rollers are arranged on the roller table and / or on the set-up or storage device, wherein the

Flämmturm closest support rollers ^{¬ are} pivotally ^¬ . These backup rollers are pivoted Wegge ^¬ when the workpiece is detected before and after the scarfing of the driver rollers and transported further.

Finally, a channel for draining the granulated slag and the granulating water can be provided in the working area of the device. The workpiece to be flattened is fed via a roller table, for example a continuous casting machine. Under the roller table is a with running water filled, lined with baffles channel, which leads from the cutting of the workpiece descending scale ^¬ . The channel extends below the

Flammbrennerturms and also captures the abge ^¬ scummed during the flaming steel and slag, which is also blown by the granulating. The channel thus serves to collect and remove molten steel, slag and Granulierwasser and also at the same time for the extraction of flue gas.

The idea underlying the invention will be described in more detail in the following description with reference to a Ausführungsbei ^¬ game, which is shown in the drawings. Show it:

1 is a plan view of a device for scarfing workpieces,

Fig. 2 is a partial side view of the device according to

Fig. 1,

Fig. 3 is a sectional view A-A of FIG. 1 rotated by 90 ° and

Fig. 4 is a sectional view B-B of FIG. 1 rotated by 90 °.

The device 1 shown in Figs. 1 to 4 is a Flämmmaschine to scarfing of hot and cold workpieces 2, such as slabs, made of steel in and after die casting machines ^¬ and has a rack-like vertical Flämmturm 3. In this one is a rigid, vertical upright Flämmbrennerrahmen 4 arranged with a plurality of arranged on all four sides Flämmbrennern 5. Thus, a Flammbrenner 5.1 for the vor ^¬ dere broadside, a Flammbrenner 5.2 for the rear broadside, a Flämmbrenner 5.3 for the upper long narrow side and a Flammbrenner 5.4 are provided for the lower long narrow side, the latter is ^¬ pivotally formed by the workpiece 2. Thereby, while allowing all four sides, NaEM ^¬ Lich the long narrow sides and the wide sides of the workpiece 2, a scarfing.

The Flammbrennerrahmen 4 is rectangular and has a central opening for passing the workpiece to be flattened 2. The Flämmbrenner 5 in

Flammbrennerrahmen 4 are arranged at an angle of preference ^¬ example, about 30 ° to the vertical and directed towards the workpiece.

The workpiece to be flattened 2, for example, a Bram ^¬ me, in the transport direction according to arrow X in Fig. 1 on a present in a continuous casting hori ^¬ zontalen roller 6.1 leads to the Flämmmaschine 1, flat lie ^¬ on one of its broads ^¬ Gend, as the workpiece 2 from the continuous casting plant üb ^¬ Licherweise transported. The horizontal roller ^¬ gear 6.1 are associated with an opening device 7 and a verti ^¬ cal roller table 8.1, which has a plurality of support rollers 9.1, wherein the stacking tower 3 nearest support roller 9.1 is formed laterally wegschwenkbar. Prior to scarfing the workpiece 2 is erected as shown in FIGS. 2 and 3 with the Aufstell device 7 by 90 ° on one of its narrow sides, so that the workpiece 2 with its narrow side on the horizontal roller table 6.1 and with its corresponding broadside on verti cal roller table 8.1 on or abuts. In this case, the support roller 9.1 closest to the flaming tower 3 bears against the workpiece 2. For further transport of the workpiece 2, this support roller 9.1 is pivoted away laterally.

During further transport of the now lying on a narrow side of the workpiece 2 towards the flaming tower 3 is the

Workpiece 2 guided and moved by a arranged in front of the Flämmturm 7 and driven by a motor drive 11.1 Drivers ^¬ roller unit 10.1 to the vertical Flammbrennerrahmen. This surrounds the workpiece 2 on all sides, wherein the arranged on all four sides of the Flämmbren- nerrahmen 4 Flammbrenner 5 are directed to the jewei ^¬ lige workpiece surface. The Flämmma- machine 1 is connected to an operating and control unit 12, with which it is completely controlled.

First, the heating of the front in the transport direction edges of the workpiece by means of Flämmbren ^¬ ner 5 in Flämmbrennerrahmen 4. In order to avoid contamination of the lower Flaming burner 5.4 during the heating, this is wegeschwenkt away from the workpiece 2 and after heating. Then, by the addition of ten Flämmsauerstoff the Flämmvorgang on all four sides, that is, the long narrow and wide sides of the work piece 2 ^¬ performed by a selected

Transport speed the workpiece 2 through the opening tion of the Flammbrennerrahmens 4 transported through and is flamed. Here, the Flämmbad of Ge ^¬ schmolzenem steel and slag fall by gravity down into a not shown channel for Ab ^¬ conduct the granulated slag and the

Granulating water, which is arranged below and / or next to the Flämmma- machine.

Passes through the workpiece 2 the Flämmbrennerrahmen 4, detects a subsequent further 10.2 those already geflämmten portion of the workpiece 2 and be ^¬ moved it further in the transport direction vertical by a motor on ^¬ operating 11.2 powered driver roller unit on one after ^¬ following additional horizontal roller path 6.2 with about ^¬ parent roller path 8.2 and a Ablagevor ^¬ direction 13. the vertical roller path 8.2 comprises a plurality of support rollers 9.2, wherein the support roller 3 Flämmturm the closest is 9.2 formed laterally pivoted away. For further transport of the workpiece 2, this support roller 9.1 is laterally pivoted away and reapplied when the workpiece 2 has passed the driver roller unit 10.2.

The tray 13 is now inserted after completion of the scarfing operation, the geflämmte workpiece 2 back on ei ^¬ ne of its broad sides in the horizontal roller conveyor from 6.2 by this is brought back by 90 ° to its original position. Laterally on the flame burner frame 4 or on the flaming tower 3 are installed in the vicinity of the flame burner 5

Granulating nozzles 14 for Abgranulieren emerging molten steel and slag arranged by means of water transversely to the vertical. So can two

Granulating nozzles 14.1 and 14.2 for the broad sides front and rear and two granulating nozzles 14.3 and 14.4 for the long narrow sides at the top and bottom of the workpiece 2 be provided, preferably the lower

Granulating nozzle 14.4 can be designed to be movable to create a larger work area.

During the scarfing, the molten steel produced during the scarfing and the slag are granulated transversely to the vertical and blown out of the scarfing area into the channel by the granulating nozzles 14. For this ^¬ to the granulated slag and the granulating derived.

List of reference numbers

1 device, flaming machine

2 workpiece

3 flaming tower

4 flame burner frame

5 Flame burner 5.1 to 5.4

6 Horizontal roller table 6.1 and 6.2

7 erection device

8 vertical roller table 8.1 and 8. 2

9 Back-up roller 9.1 and 9.2

10 driver roller unit 10.1 and 10.2

11 Driver roller drive 11.1 and 11.2

12 operating and control unit

13 storage device

14 granulating nozzle 14.1 to 14.4

Claims

claims

1. Method for scalding hot and cold

Workpieces (2), such as slabs, made of steel in and after continuous casting by means of flame burners (5), characterized in that in a vertical Flämmturm (3) with a rigid vertically

erected Flammbrennerrahmen (4), which encloses a horizontally supplied, on one of its long narrow sides vertically erected workpiece (2) on all sides, the Flämmbrennerrahmen (4) after heating the upper workpiece edges by means of flame burners (5), on all four

Pages on the Flammbrennerrahmen (4) are arranged, the simultaneous scarfing at two

opposite, ie on all four sides of the workpiece (2) by adding Flämmsauerstoff begins and then with a selected

Transporting the workpiece (2) through the Flammbrennerrahmen (4) and is flamed while the Flämmbad of molten steel and slag by gravity falls down, the workpiece (2) before scarfing on a roller table (6.1) lying by means of a On the adjusting device (7) erected vertically on one of its narrow sides, guided horizontally through the flame burner frame (4) during the scarfing by means of driver rollers (10) and after scarfing by means of a depositing device (13) on a further roller table (6.2) back to a his broadsides are filed.

2. The method according to claim 1, characterized in that the Flammbrenner (5) in the Flammbrennerrahmen (4) the workpiece (2) at an angle of

preferably about 30 ° to the vertical flame.

3. The method according to claim 1, characterized in that at least one, preferably the lower flame burner (5.4) before heating away from and back to the workpiece to be flattened (2)

can be swiveled.

4. The method according to claim 1, characterized in that during the scarfing at least one located in the vicinity of the Flämmbrenner (5)

Granulating nozzle (14) the resulting molten steel and the slag granulated transverse to the vertical and lower equipment parts

protects.

5. The method according to claim 1, characterized in that the erected perpendicular to one of its narrow sides workpiece (2) is held upright during the scarfing by support rollers (9) and secured against falling over.

6. Device (1) for scarfing hot and cold workpieces (2), such as slabs, of steel in and after continuous casting by means of flame burners (5), characterized by a transport direction of the workpiece (2) located roller table (6.1) on which the workpiece to be flattened (2), with a Aufstell device (7) for erecting the workpiece (2) perpendicular to one of its long narrow sides and drive rollers (10.1) for

Transporting the workpiece (2) to a vertical Flämmturm (3) with a rigid vertically erected Flämmbrennerrahmen (4) with a plurality on all four sides

arranged Flämmbrennern (5), which encloses the vertically erected on its long narrow side and to be flattened workpiece (2), and at least one in the vicinity of the Flämmbrenner (5) installed Granulierdüse (14) for Abgranulieren of

resulting molten steel and slag transverse to the vertical, and further drive rollers (10.2) for transporting the workpiece (2) to a subsequent storage device (13) for depositing the workpiece (2) on one of his

Broadsides on another roller table (6.2).

Device according to claim 6, characterized

characterized in that the vertically erected Flammbrennerrahmen (4) is rectangular and has a central opening for passing the workpiece to be flattened (2).

Device according to claim 6, characterized

characterized in that the flame burner (5) in

Flame burner frame (4) at an angle of

preferably arranged at about 30 ° to the vertical and directed towards the workpiece to be flattened (2).

9. Device according to claim 6, characterized

in that in each case a support device for maintaining the vertically erected on a long narrow side and to be flattened

Workpiece (2) is arranged before and after the Flämmturm (3) and preferably consists of support rollers (9).

10. Device according to claim 6, characterized

characterized in that the support rollers (9) on

Roller table (6; 8) and / or at the erection or

Storage device (7,13) are arranged, wherein the flaming tower (3) closest to the support rollers (9.1, 9.2) are pivoted away.

11. Device according to claim 6, characterized

characterized in that a channel for discharging the granulated slag and the Granulierwassers is provided in the working area.