DE102013213418A1 - Casting-rolling compound system for preparing hot-rolled products e.g. endless strip, has raising device and unloading device that are arranged between rollers respectively, and heating modules that are arranged in induction furnace - Google Patents

Abstract

The system has a continuous casting machine for continuous casting of a strand of an endless starting material. An intermediate road area (Z) of scissors (9) cuts a strip (30). Unloading device (8) feeds the sliver section. An induction furnace heats the strip to a rolling temperature. Roller conveyor has rollers (31-33) arranged in a conveying direction. Cooling section cools a finished belt. Raising device (11) is arranged between first and second rollers (31,32). Unloading device is arranged between second and third rollers (32,33). Heating modules (12a) are arranged in furnace. An independent claim is included for casting plant.

Description

Field of engineering

The present invention relates to the so-called intermediate road section of a cast-rolling compound plant, i. the area between a roughing mill and a finishing train in a cast-rolling compound.

Cast-roll compound equipment is a plant in which a casting machine (for example, a continuous casting machine, a roller or caterpillar casting machine or a two-roll casting machine) is coupled to a rolling mill. A cast-rolling composite plant can be operated either in the so-called endless operation or in the so-called semi-continuous operation (English semi-endless or batch operation), whereby in endless operation the strand produced by the casting plant is uncut in the rolling plant is processed into a hot-rolled product. The casting / rolling compound plants thus include ESP (Endless Strip Production), CSP (Compact Strip Production) and so-called CSP-flex plants.

• – eine Stranggießmaschine zum Stranggießen eines Strangs eines endlosen Vormaterials; nachfolgend
• – eine Vorwalzstraße zum Vorwalzen des Strangs des Vormaterials zu einem Vorband; nachfolgend
• – ein Zwischenstraßenbereich der eine Schere zum Schneiden des Vorbands, eine Anhebeeinrichtung zum Anheben eines Strangabschnitts, eine Ausfördereinrichtung zum Ausfördern eines Vorbandabschnitts, einen Induktionsofen zum Erwärmen des Vorbands auf Walztemperatur und einen Rollgang mit mehreren in Transportrichtung hintereinander angeordneten Rollen umfasst, wobei die Rollen eine Transportbahn für das Vorband bilden; nachfolgend
• – eine Fertigwalzstraße zum Fertigwalzen des Vorbands zu einem Fertigband; nachfolgend
• – eine Kühlstrecke zum Abkühlen des Fertigbands; und nachfolgend
• – eine Speichereinrichtung zum Aufwickeln oder Aufstapeln des Fertigbands.

Specifically, the invention relates to a cast-roller composite plant for the production of hot-rolled products, comprising

• - A continuous casting machine for continuously casting a strand of an endless starting material; following
• - A roughing mill for roughing the strand of the starting material to a pre-strip; following
• - An intermediate road section comprising a scissors for cutting the Vorbands, a lifting device for lifting a strand section, a discharge for conveying a Vorbandabschnitts, an induction furnace for heating the Vorbands to rolling temperature and a roller table with a plurality of rollers arranged behind one another in the transport direction, wherein the rollers a transport path for the opening band form; following
• A finishing train for finish-rolling the pre-strip into a finished strip; following
• A cooling section for cooling the finished strip; and below
• - A storage device for winding or stacking the finished tape.

State of the art

From the WO 2009/121678 A1 the Applicant is a generic casting-rolling compound with a continuous casting machine 2 , a roughing mill 5 , an intermediate road area of a pair of scissors 9 , a lifting device 11 , a discharge device 8th , an induction furnace 12 and a roller table, a finishing train 14 , a cooling section 15 and a storage device 17 known. Although this cast-rolling composite has proven very well in practice, it is disadvantageous that the successive arrangement of the scissors in the transport direction of the belt 9 , the discharge device 8th , the lifting device 11 , and the induction oven 12 has a total length of about 30 m. Due to the high length, the strip cools down more on the way to the finishing mill, more scale is produced on the strip, and the investment costs (English CAPEX) and operating costs (English OPEX) are increased. Of course, it would be possible to make the intermediate road area significantly more compact by eliminating the scissors, the discharge device and the lifting device. However, this would have the consequence that would have to be interrupted in case of an interruption in a part of the system behind the scissors of the casting, so that the reliability of the system would decrease sharply. As with a comparably high level of operational reliability, the overall length of the cast-rolling composite plant can be reduced and the investment and operating costs of the cast-rolled composite plant can be reduced, as the document does not show.

Summary of the invention

• – eine Störung in einem Anlagenteil, der dem Zwischenstraßenbereich nachgelagert ist, überbrückt werden kann, ohne dass dabei der kontinuierliche Gießbetrieb der Stranggießmaschine unterbrochen werden muss,
• – die Gesamtlänge der Gieß-Walz-Verbundanlage reduziert werden kann, und
• – die Investitions- und Betriebskosten der Gieß-Walz-Verbundanlage reduziert werden können.

The object of the invention is to overcome the disadvantages of the prior art and to provide a compact cast-rolling compound, with the

• A fault in a part of the plant downstream of the intermediate road area can be bridged without having to interrupt the continuous casting operation of the continuous casting machine,
• - The total length of the cast-rolling composite plant can be reduced, and
• - The investment and operating costs of the cast-rolling composite plant can be reduced.

• – eine Anhebeeinrichtung, und
• – eine Ausfördereinrichtung,

angeordnet ist, und im Bereich zwischen der zweiten Rolle und der dritten Rolle zumindest ein Heizmodul des Induktionsofens angeordnet ist. This object is achieved by the above-mentioned cast-rolled composite system in that a first roller, a second roller and a third roller of the roller table in the transport direction are arranged behind one another in the intermediate road, wherein in the region between the first roller and the second roller at least one from the group

• A lifting device, and
• A discharge device,

is arranged, and at least one heating module of the induction furnace is arranged in the region between the second roller and the third roller.

The role of the roller table, which is referred to as the first roller, must by no means be the very first role of the intermediate road area in the transport direction. Specifically, it is only one role, followed by two other roles (namely, the second and the third role).

• – eine Anhebeeinrichtung, und
• – eine Ausfördereinrichtung,

angeordnet ist. Furthermore, the object is achieved by the above-mentioned cast-rolling composite system in that in the intermediate road area an n-th roll, an n + 1-th roll and a n + 2-th roll of the roller table in the transport direction are arranged one behind the other, in the A heating module of the induction furnace is arranged between the n-th roll and the n + 1-th roll, and in the region between the n + 1-th roll and the n + 2-th roll at least one of the group

• A lifting device, and
• A discharge device,

is arranged.

By a combination of claims 1 and 2, the compactness of the cast-rolling composite system is further increased.

Due to the spatial integration of the lifting device according to the invention, the discharge device and the induction furnace, the total length of the intermediate road area is reduced from approximately 30 m to approximately 15 m, without thereby reducing operational safety. Due to the shorter overall length, the pre-strip cools less and forms less scale on the pre-strip. Due to the low cooling, the pre-strip also has to be heated less in the induction furnace, which further reduces operating costs. The lower scaling also improves the quality of the hot strip. Finally, the investment costs are reduced by the shorter length.

For the invention, it does not matter if the rough rolling mill or finishing train has one or more stands.

Preferably, the scissors is a pendulum scissors or a drum shears.

A simple and robust lifting device comprises at least one lifting cylinder and a lifting beam oriented transversely to the transport direction, wherein the lifting beam can be raised and lowered by the lifting cylinder in the vertical direction.

A simple and robust discharge device comprises at least one Abschubzylinder oriented transversely to the transport direction, so that the Vorbandabschnitt can be deported by the Abschubzylinder in the horizontal direction of the roller table.

It is advantageous if the induction furnace has a heating module above the transport path and an associated actuating device between two rollers arranged one behind the other in the transport direction, and the heating module can be moved by the actuating device from a region which delimits the transport path by two vertical planes. After the occurrence of a fault, the strand is cut off by the scissors and the heating module is moved out of the area above the transport path by the actuating device. As a result, the cut strand section can be lifted unhindered by the lifting device.

In a simple mechanism for clearing the area above the transport path, the heating module can be extended by the actuating device transversely to the transport direction. The heating module is e.g. guided by a rail. In this case, the actuating device may be e.g. be designed as a pneumatic cylinder.

Alternatively, the heating module can be swung out of the area by the actuating device. Also in this case, the actuator may e.g. be designed as a pneumatic cylinder.

For a high heating power, the induction furnace between two in the transport direction successively arranged rollers on a heating module below the transport path.

The cutting of the strand, the lifting of the strand section and the conveying out of pre-strip sections can be represented particularly easily if a clamping device is arranged in the intermediate road area after the last lift element of the lifting device in the transport direction.

In order to ensure a reliable clamping even with an oily or greasy surface of the pre-strip section, it is advantageous if the clamping device comprises a clamping cylinder and in a plane normal to the transport direction two rollers, wherein at least one roller can be pressed by the clamping cylinder to the strand section.

It is advantageous if the clamping cylinder is a hydraulic or pneumatic cylinder.

In order to prevent the rolling of scale, it is advantageous if a descaling device is arranged immediately before the finishing train.

The primary material and the pre-strip can be transported on a very short path through the cast-rolling composite system, if the Continuous casting machine, the roughing mill and the finishing train are arranged in-line. A short transport path causes low cooling and low scaling.

In general, the storage device is a take-up device for winding the finished strip into bundles or a stacking device for stacking the finished strip.

Brief description of the drawings

Further advantages and features of the present invention will become apparent from the following description of non-limiting embodiments, reference being made to the following figures, which show the following:

1 a schematic representation of a casting-rolling composite plant for fully continuous endless operation

2 a schematic representation of a section of the intermediate road area according to the prior art

3a and 3b an elevation and a plan view in a schematic representation of an embodiment of the intermediate road area according to the invention

4a ... 4h a schematic representation of the steps in the intermediate road area to bridge a production interruption

5 a side view of a hinged heating module of the induction furnace

Description of the embodiments

1 shows one from the WO 2009/121678 A1 known casting-rolling compound 1 , In continuous operation produces a continuous casting machine 2 continuously a starting material 3 in the form of a thin slab strand, over a roller table 4 to a roughing mill 5 is transported. After roughing in the roughing mill 5 , goes through the opening band 30 uncut, ie as a strand, the intermediate road Z, an induction furnace 12 and a descaler 13 includes before the preliminary strip in a single or multi-stand finishing train 14 to a finished tape 40 is hot rolled. The finished tape 40 is then in a cooling section 15 cooled, by a pair of scissors 16 cut to a certain product length or a certain product weight and then from a designed as a take-up storage device 17 wound. The roller table 4 connects all parts of the plant between the horizontal strand guide of the continuous casting machine 2 and the storage device 17 ; the continuous casting machine 2 , the roughing mill 5 and the finishing train 14 are arranged in a line (in-line).

In 2 is the device for cutting and conveying 6 of the 1 shown comprising a first pair of scissors 9a , a discharge device 8th , a second pair of scissors 9b , a lowerable roller table 18 and a lifting device 11 , Immediately after the occurrence of a malfunction in a plant part, that of the device for cutting and discharging 6 is downstream (eg the finishing train 14 or the winding device 17 ) becomes the opening act 30 from the second pair of scissors 9b severed, thereby getting behind the second pair of scissors 9b a strand section 21 formed. Around the strand section 21 from the continuously produced, from the roughing mill 5 incoming, opening band 30 to separate, becomes the strand section 21 from a lifting device 11 raised. That's the second pair of scissors 9b passing opening band 30 gets off the scissors 9b on scrap pieces 19 divided by a lowerable roller table 18 be promoted. Because the scrap pieces 19 are generally difficult to exploit, after the occurrence of the disorder, the opening band 30 from a first pair of scissors 9a to sub-band sections 10 , each having a length of 8-14 m, cut off, the Vorbandabschnitte 10 over the discharge device 8th transverse to the transport direction 7 be promoted. A disadvantage of the intermediate road Z according to the prior art is that this has a total construction length of about 30 m, that by the overall length of the opening band 30 in continuous operation cools relatively strong, due to the residence time in the intermediate road Z the Vorband 30 relatively heavily scaled, and that the investment and operating costs of the cast-rolled composite plant 1 are relatively high.

The 3a and 3b show an embodiment of the intermediate road area Z according to the invention of the cast-rolling composite plant 1 who after the disadvantages of the solution 2 no longer has. Apart from the shorter length of the intermediate road Z area can also with the known casting-rolling compound 1 of the 1 be used. Specifically, the intermediate road area has a pair of scissors 9 on, which is designed for example as pendulum scissors or drum shears. On the scissors 9 follows in the direction of transport 7 a first role 31 and a second role 32 the roller table, wherein between the first and the second roller a lifting device 11 and a discharge device 8th are arranged. The term "between the first and the second role ... arranged" is to be understood in this document, the arrangement of an element that between two vertical, transverse to the transport direction 7 aligned planes, each plane intersecting the axis of rotation of a roll. The lifting device 11 is in the 3a . 3b shown in lowered position. Between the second roll 32 and the third role 33 is a heating module 12a of the induction furnace 12 arranged that is extendable transversely to the transport direction (in 3b the extension direction is indicated by an arrow). In the rear of the intermediate road Z is an n-th role 31 ' and an n + 1th roll 32 ' arranged between which in turn a heating module 12a of the induction furnace 12 is arranged. Between the n + 1th roll 32 ' and the n + 2-th role 33 ' is a lifting device 11 and a discharge device 8th arranged. After the n + 2-th role 33 ' is a clamping device 23 for clamping a strand section 21 arranged as a pair of pinch rollers (English "pinch rolls") is formed. By the clamping device 23 will ensure that the strand section 21 by lifting the scissors 9 is pulled away so that the foot of the strand section 21 a sufficient distance to the coming Vorband 30 having. Each lifting device 11 has two lifting cylinders 24 and one transverse to the transport direction 7 aligned walking beam 27 on. Each discharge device 8th has at least one transverse to the transport direction Abschubzylinder 25 on, so that the Vorbandabschnitt 21 through the Abschubzylinder 25 in horizontal direction from the roller table 4 For example, on a stacker not shown next to the roller table 4 can be pushed.

In one embodiment, not shown, the above the roller table 4 arranged heating modules 12a hinged upwards so that before raising the strand section 21 (please refer 4c ) the heating modules are opened. This also causes a collision between the heating modules 12a and the raised strand section 21 or the lifting devices 11 prevented.

The method steps in the intermediate road area Z after the occurrence of a fault are in the 4a ... 4h shown. Shortly after the occurrence of a fault in a plant part, which is downstream of the intermediate road area Z, that of the roughing mill 5 upcoming endlessly produced opening act 30 through the scissors 9 , which is designed as pendulum scissors, cut off (the 4a shows the situation before the cut). The truncation becomes a strand section 21 formed, which is different from the scissors 9 in the transport direction 7 extends. Subsequently, the strand section 21 through the clamping device 23 clamped (the 4b shows the situation immediately before the clamping of the strand section 21 ), wherein the two rollers of the clamping device by a clamping cylinder, not shown, against the strand section 21 be pressed. In addition, at least those above the roller table 4 arranged heating modules 12a extended transversely to the transport direction (the extension of the heating modules 12a is represented by a side view of an arrow). According to the 4b Both the upper and lower heating modules will work 12a extended, with the extended heating modules in 4c were shown in dashed lines. The cut strand section 21 is in 4c through the two lifting devices 11 raised in the vertical direction. In this case, the clamping of the strand section 21 sure the foot of the strand section 21 by lifting the scissors 9 is pulled away. The foot of the raised strand section 21 points to the next opening act 30 a vertical and a horizontal offset. The 4d shows the situation after lifting, from the roughing mill 5 continuously a support band 30 complies with that through the roller table 4 is supported. After the headband 30 a certain distance (for example 10m) to the scissors 9 has, cuts the scissors 9 from the opening band 30 a sub-band section 10 from. After cutting, the pre-strip section becomes 10 by at least one driven roller 20 in the transport direction 7 accelerates, so the Vorbandabschnitt 10 a horizontal distance to the scissors 9 having ( 4f shows the situation when accelerating the Vorbandabschnitts 10 ). Finally, the pre-strip section becomes 10 from the two discharge facilities 8th pushed out of the drawing plane, so the roller table 4 between the two discharge facilities 8th is cleared. Before restarting the endless operation, the strand section 21 eg removed by a crane.

The 5 shows a hinged heating module of an induction furnace, by an unillustrated actuator over a horizontal axis of rotation, which is parallel to the transport direction 7 is aligned, from the area above the Vorbands 30 can be folded out. The unfolded position is shown in dashed lines in the figure.

In the embodiment of the invention, a pre-strip section becomes 10 viewed in elevation from the Ausfördereinrichtung 8th out of the drawing plane. Of course it would be equally possible, the Ausfördereinrichtung 8th modify so that the Vorbandabschnitt 10 is conveyed into the drawing level. A device suitable for this purpose is known from WO 2009/121678 A1 known.

While the invention has been further illustrated and described in detail by the preferred embodiments, the invention is not limited by the disclosed examples, and other variations can be derived therefrom by those skilled in the art without departing from the scope of the invention.

LIST OF REFERENCE NUMBERS

1

Casting and rolling plant

2

continuous casting

3

Raw material

4

roller table

5

roughing

6

Device for cutting and conveying

7

transport direction

8th

unloading device

9, 9a, 9b

scissors

10

Vorbandabschnitt

11

lifter

12

induction furnace

12a

Heating module of the induction furnace

13

descaling

14

Finishing mill

15

cooling section

16

scissors

17

memory device

18

lowerable roller table

19

scrap piece

20

role

21

strand section

23

clamper

24

lifting cylinder

25

Abschubzylinder

27

walking beam

29

axis of rotation

30

opening act

31

first role

32

second role

33

third role

31 '

nth role

32 '

n + 1th roll

33 '

n + 2-th role

40

finished strip

Z

Between road area

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• WO 2009/121678 A1 [0004, 0031, 0037]

Claims (15)

Cast-rolling compound plant ( 1 ) for the production of hot-rolled products, comprising - a continuous casting machine ( 2 ) for continuous casting of a strand of an endless starting material ( 3 ); below - a roughing mill ( 5 ) for roughing the strand of the starting material ( 3 ) to an opening band ( 30 ); below - an intermediate road area (Z) of a pair of scissors ( 9 ) for cutting the Vorbands ( 30 ), a lifting device ( 11 ) for lifting a strand section ( 21 ), a discharge device ( 8th ) for discharging a pre-strip section ( 10 ), an induction furnace ( 12 ) for heating the Vorbands ( 30 ) to rolling temperature and a roller table ( 4 ) with a plurality of rollers arranged behind one another in the transport direction ( 20 . 31 . 32 . 33 ), wherein the rollers a transport path for the pre-band ( 30 ) form; below - a finishing train ( 14 ) for finish rolling the Vorbands ( 30 ) to a finished strip ( 40 ); below - a cooling line ( 15 ) for cooling the finished strip ( 40 ); and subsequently - a memory device ( 17 ) for winding or stacking the finished strip ( 40 ), characterized in that in the intermediate road area (Z) a first roller ( 31 ), a second role ( 32 ) and a third role ( 33 ) of the roller table ( 4 ) in the transport direction ( 7 ) are arranged one behind the other, wherein in the region between the first roller ( 31 ) and the second roll ( 32 ) at least one of the group - a lifting device ( 11 ), and - a discharge device ( 8th ), and in the area between the second roller ( 32 ) and the third role ( 33 ) at least one heating module ( 12a ) of the induction furnace ( 12 ) is arranged. Cast-rolling compound plant ( 1 ) for the production of hot-rolled products, comprising - a continuous casting machine ( 2 ) for continuous casting of a strand of an endless starting material ( 3 ); below - a roughing mill ( 5 ) for roughing the strand of the starting material ( 3 ) to an opening band ( 30 ); below - an intermediate road area (Z) of a pair of scissors ( 9 ) for cutting the Vorbands ( 30 ), a lifting device ( 11 ) for lifting a strand section ( 21 ), a discharge device ( 8th ) for discharging a pre-strip section ( 10 ), an induction furnace ( 12 ) for heating the Vorbands ( 30 ) to rolling temperature and a roller table ( 4 ) with a plurality of rollers arranged behind one another in the transport direction ( 20 . 31 . 32 . 33 ), wherein the rollers a transport path for the pre-band ( 30 ) form; below - a finishing train ( 14 ) for finish rolling the Vorbands ( 30 ) to a finished strip ( 40 ); below - a cooling line ( 15 ) for cooling the finished strip ( 40 ); and subsequently - a memory device ( 17 ) for winding or stacking the finished strip ( 40 ), characterized in that in the intermediate road area (Z) an n-th roller ( 31 ' ), a (n + 1) th roll ( 32 ' ) and one (n + 2) th roll ( 33 ' ) of the roller table ( 4 ) in the transport direction ( 7 ) are arranged one behind the other, wherein in the region between the nth roller ( 31 ' ) and the (n + 1) th roll ( 32 ' ) a heating module ( 12a ) of the induction furnace ( 12 ) and in the area between the (n + 1) -th roll ( 32 ' ) and the (n + 2) th roll ( 33 ' ) at least one of the group - a lifting device ( 11 ), and - a discharge device ( 8th ) is arranged. Installation according to one of the preceding claims, characterized in that the rough rolling mill ( 5 ) has one or more rolling stands. Installation according to one of the preceding claims, characterized in that the scissors ( 9 ) is a pendulum scissors or a drum shears. Installation according to one of the preceding claims, characterized in that the lifting device ( 11 ) at least one lifting cylinder ( 24 ) and a transverse to the transport direction Hubbalken ( 27 ), wherein the lifting beam ( 27 ) by the lifting cylinder ( 24 ) can be raised and lowered in the vertical direction. Installation according to one of the preceding claims, characterized in that the discharge device ( 8th ) at least one transverse to the transport direction aligned Abschubzylinder ( 25 ), so that the pre-strip section ( 21 ) by the Abschubzylinder ( 25 ) in horizontal direction from the roller table ( 4 ) can be deported. Installation according to one of the preceding claims, characterized in that the induction furnace ( 12 ) between two rollers arranged in succession in the transport direction ( 31 . 32 . 33 ) a heating module ( 12a ) above the transport path and an associated actuating device, and that the heating module ( 12a ) can be moved by the actuator from a region which limits the transport path by two vertical planes. Plant according to claim 7, characterized in that the heating module ( 12a ) by the actuating device transversely to the transport direction ( 7 ) is extendable. Plant according to claim 7, characterized in that the heating module ( 12a ) can be swung out of the area by the actuator. Installation according to one of the preceding claims, characterized in that the induction furnace ( 12 ) between two rollers arranged in succession in the transport direction ( 31 . 32 . 33 ) a heating module ( 12a ) has below the transport path. Installation according to one of the preceding claims, characterized in that in the intermediate road area (Z) at least one lifting device ( 11 ) is arranged, wherein in the intermediate road area (Z) after the in the transport direction ( 7 ) last lifting device ( 11 ) a clamping device ( 23 ) is arranged. Plant according to claim 11, characterized in that the clamping device ( 23 ) a clamping cylinder and in a plane normal to the transport direction ( 7 ) two rolls ( 20 ), wherein at least one roller by the clamping cylinder to the strand section ( 21 ) can be pressed. Plant according to claim 12, characterized in that the clamping cylinder is a hydraulic cylinder. Installation according to one of the preceding claims, characterized in that the continuous casting machine ( 2 ), the roughing mill ( 5 ) and the finishing train ( 14 ) are arranged in a line. Installation according to one of the preceding claims, characterized in that the storage device ( 17 ) is a take-up device for winding the finished strip into bundles or a stacking device for stacking the finished strip.

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