Apparatus for treating a metal strip, surface treatment apparatus, cooling apparatus, arrangement consisting of a cooling apparatus and a surface treatment apparatus, production line, method for continuously treating a metal strip

Abstract

The invention relates to an apparatus for treating a metal strip, in particular a hot metal strip, having a machine direction along which the metal strip can be conveyed on a conveyor line, having a cooling apparatus for cooling the metal strip, and having a surface treatment apparatus for modifying a surface condition on the metal strip, wherein the surface treatment apparatus is located downstream of the cooling apparatus in the machine direction.

Description

[0001] Page 1 / 37

[0002] Applicant: SMS group GmbH

[0003] Our reference number: P81042DE

[0004] August 25, 2025

[0005] Device for treating a metallic strip, surface treatment device, cooling device, arrangement of a cooling device and a surface treatment device, production line, method for continuously treating a metallic strip, use of a surface treatment device and use of a cooling device

[0006] The invention relates to a device for treating a metallic strip, in particular a hot-rolled metallic strip, with a machine direction along which the metallic strip can be conveyed on a conveyor line.

[0007] The invention further relates to a surface treatment device for descaling, in particular for pickling, a metallic strip, in particular a hot-rolled strip, on a production line for hot rolling the metallic strip.

[0008] The invention further relates to a cooling device for cooling a metallic strip, in particular a hot-rolled strip, on a production line for coating the metallic strip with a surface coating.

[0009] The invention further relates to an arrangement consisting of a cooling device and a surface treatment device.

[0010] The invention also relates to a production line for the manufacture and / or processing of a metallic strip, in particular a galvanized steel strip, especially a page 2 / 37

[0011] P81042DE

[0012] semi-finished product and / or a pre-product and / or an intermediate product and / or a product made of ferrous, steel and / or a non-ferrous metal material.

[0013] The invention also relates to a method for the continuous treatment of a hot-rolled metallic strip on a conveyor line, in particular for the production of a galvanized steel strip.

[0014] The invention also relates to the use of a surface treatment device.

[0015] The invention additionally relates to the use of a cooling device.

[0016] A large number of different production lines for manufacturing or processing metallic strips, especially hot-rolled strips, are known from the state of the art.

[0017] The invention is based on the objective of providing an improvement or an alternative to the prior art.

[0018] According to a first aspect of the invention, the object of the invention is to provide a device for treating a metallic strip, in particular a hot-rolled metallic strip, with a machine direction along which the metallic strip can be conveyed on a conveyor line, with a cooling device for cooling the metallic strip and with a surface treatment device for changing a surface condition on the metallic strip, wherein the surface treatment device is arranged downstream of the cooling device in the machine direction.

[0019] Because the present device is both a surface treatment device and a device connected upstream to it - page 3 / 37

[0020] P81042DE has a cooling device arranged in the same conveying path, the metallic strip to be treated by the surface treatment device can be set to an optimal treatment temperature for the surface treatment device immediately before the surface treatment.

[0021] Therefore, particularly good results can be achieved using the proposed device with the surface treatment device.

[0022] Furthermore, surface treatment of the metallic strip can be carried out much more energy-efficiently.

[0023] Since operation of the surface treatment device can be ensured solely by means of the “first heat” inherent in the metallic strip, i.e. the “casting heat” originating from the casting process of the metallic strip, the introduction of additional heat energy can preferably be completely dispensed with, especially after a hot rolling process.

[0024] The term “treatment device”, also referred to as “treatment device”, describes, within the meaning of the invention, a combined device for heat reduction and surface condition treatment of the metallic strip on a conveyor line for conveying this metallic strip, in particular on a conveyor line with an input-side primary forming device for primary forming the metallic strip.

[0025] The term "conveyor line" as used in the invention describes a conveyor line designed to continuously convey the metallic strip between and at individual processing or treatment devices arranged along the conveyor line, in particular from an inlet side of the conveyor line to an outlet side of the conveyor line. Page 4 / 37

[0026] P81042DE

[0027] In this context, it is particularly advantageous if the metallic strip is conveyed upstream of the cooling device and / or the surface treatment device along the entire conveying path, bypassing a winding device for winding a metallic strip, in particular between a primary forming device for primary forming the metallic strip and / or a forming device for forming the metallic strip and the cooling device and / or the surface treatment device of the present device.

[0028] In other words, this means that the metallic strip is continuously conveyed without primary forming or shaping up to the present device, i.e., without the interposition of a winding device for temporary winding and unwinding or for temporary intermediate storage in the form of a coil or winding bundle.

[0029] This also means that the metallic strip is conveyed as a "material flow" from the primary forming device to the present treatment device, in particular the cooling device and also to the surface treatment device thereof, in particular conveyed continuously, be it as a linearly formed endless strip or as prefabricated linearly formed strip sections.

[0030] It is understood that this will result in a particularly energy-efficient production of a product from the metallic strip.

[0031] The term "metallic strip" here describes any product comprising an electrically conductive ferrous metal, a steel metal, and / or a non-ferrous metal. In particular, a metallic strip can include any semi-finished product and / or any intermediate product and / or any intermediate product. Page 5 / 37

[0032] P81042DE

[0033] The term "product" and / or any product that is electrically conductive is understood to mean "metallic strip". Preferably, the metallic strip in this case is a rolled metal strip, or simply "rolled strip".

[0034] It should also be noted that, within the context of the present patent application, indefinite articles and indefinite numerical indications such as "one...", "two...", etc., are generally to be understood as minimum indications, i.e., as "at least one...", "at least two...", etc., unless it is clear from the context or the specific text of a particular passage that only "exactly one...", "exactly two...", etc., is meant there.

[0035] It should be noted here that, within the context of the present patent application, the term "in particular" is always to be understood as introducing an optional, preferred feature. The term is not to be understood as "namely" or "indeed".

[0036] The present device can be built in a particularly compact manner if the cooling device and the surface treatment device are arranged at a distance of 50 m or less from each other, preferably 25 m or less, more preferably 10 m or less, more preferably 5 m or less and most preferably 2 m or less.

[0037] In particular, a smaller distance can help to ensure that the cooling device and the surface treatment device can be thermally matched more precisely.

[0038] The proposed distances can, in particular, prevent the metallic strip from cooling critically upstream of the present treatment device and from coming into contact with the metallic strip immediately before the cooling device or the surface treatment. Page 6 / 37

[0039] P81042DE requires additional heat energy to be supplied to the lung device.

[0040] Rather, it is advantageous in this case to extract only enough heat energy from the metallic strip to cool it down to the required strip temperature for surface treatment on the surface treatment device.

[0041] It goes without saying that the cooling device and the surface treatment device can also be arranged directly one behind the other, i.e., with a distance of 0 m, if this is desired for specific customer requirements. This also applies to distances greater than 50 m, although the risk of unfavorable cooling increases with increasing distances.

[0042] For most applications, it is advantageous if the distance is between 50 m and greater than or equal to 2 m, as this allows a thermal window required for the surface treatment device to be reliably set on the metallic strip solely by means of the cooling device.

[0043] The distances described here are preferably measured between a strip outlet of the cooling device and the strip inlet of the surface treatment device, wherein the strip outlet and the strip inlet are arranged opposite each other.

[0044] It is particularly advantageous if the cooling device includes a hot strip cooling unit for cooling a hot metallic strip, especially starting from a strip temperature of 700°C or more, preferably 720°C or more, and particularly preferably 750°C or more, and / or with a strip temperature of 950°C or less, preferably 900°C or less, and particularly 800°C or less. Page 7 / 37

[0045] P81042DE

[0046] If the strip temperature of the metallic strip, in particular of the hot-rolled metallic strip, is within a temperature range such as that proposed here, it is possible to forgo an additional heat input into the metallic strip by means of an additional heating device upstream of the surface treatment device, thereby making the overall production of the metallic strip significantly more energy-efficient.

[0047] Such strip temperatures can be provided particularly well on the conveying path upstream of the present treatment device if the metallic strip leaves a hot rolling mill as a hot strip.

[0048] Preferably, the metallic strip was hot-rolled using only the heat inherent in it from the original forming process of the metallic strip.

[0049] A change in the surface condition or surface quality of the metallic strip can be carried out in a variety of ways using suitable surface treatment devices.

[0050] Therefore, a wide variety of surface treatment devices can be used on the present treatment device.

[0051] It is advantageous if the surface treatment device comprises a chemically operating surface treatment device and / or an ultrasonic surface treatment device and / or a mechanically operating surface treatment device, in particular a chemically operating descaling device, especially a boiling device, preferably a turbulence boiling device. Page 8 / 37

[0052] P81042DE

[0053] Using such a surface treatment device, the metallic strip can be very well prepared for subsequent treatment steps, for example immediately after a hot rolling process, on a single conveying line.

[0054] In an alternative embodiment, the surface treatment device can be a mechanically operating surface treatment device, preferably in the form of a shot-blast device.

[0055] In this context, it is particularly advantageous if the conveying section of the cooling device and the surface treatment device is a section of a common production line for casting and rolling the metallic strip on the one hand and for coating the metallic strip on the other.

[0056] This allows the various processing and treatment steps for manufacturing a finished product, semi-finished product, or the like from the metallic strip to be carried out on a single conveyor line.

[0057] It hardly requires a more detailed explanation at this point that this represents an enormous step towards a more effective, and in particular more energy-efficient, production of the metallic strip as a whole.

[0058] Ideally, additional heating devices on the conveyor line can be completely dispensed with, or if these are required in special applications, the use of such heating devices can be significantly reduced.

[0059] Therefore, it is advantageous if the conveying line in question is, for example, a conveying line of a continuously operating electroplating line (CGL, Continuous, page 9 / 37).

[0060] P81042DE

[0061] Galvanizing Line), a Pickling and Galvanizing Line (PGL), an Annealing and Pickling Line (APL), a Decarburizing and Coating Line (DGL), a Flattening and Coating Line (FCL), or the like.

[0062] It is particularly advantageous if the device is a connecting aggregate unit on a production line for connecting a casting-rolling line and a coating line, in particular an annealing-galvanizing line.

[0063] This allows previously completely separate and also different processing and treatment lines to be connected, in particular material flow connected and / or seamlessly interconnected, thereby achieving the effects and advantages already explained above.

[0064] Furthermore, it is advantageous if the device has a first interface to a hot rolling device with respect to its conveying path, wherein the first interface is arranged upstream of the cooling device with respect to the machine direction.

[0065] This first interface allows the present treatment device to be advantageously integrated directly into a casting and rolling line for casting (primary forming) and subsequent hot rolling of the metallic strip that has just been cast or primary formed.

[0066] A first interface is understood to mean that the device can be directly connected to at least one component of a casting-rolling line with an uninterrupted material flow, in particular bypassing an intermediate page 10 / 37

[0067] P81042DE switched tape storage for at least temporal decoupling of the material flow between the at least one component of a casting-rolling line and the device.

[0068] Optionally, the device has a hot rolling device upstream of the cooling device in the machine direction.

[0069] This makes it possible not only to heat-roll the metallic strip in an energetically advantageous way with the first heat, but also this first heat can be sufficient for a surface treatment to change a surface condition of the metallic strip that was cast shortly before.

[0070] Therefore, the energy expenditure for the production or the processing and treatment processes required for this can be significantly reduced.

[0071] The present hot rolling device can be designed in a variety of ways. In particular, the hot rolling device can be designed as a hot rolling mill, which may also have several rolling stands arranged along the conveying path of the casting-rolling line.

[0072] The proposed treatment device is advantageously arranged on this conveying line, preferably at the end of the casting-rolling line, wherein the conveying line of the treatment device represents a section of this casting-rolling line.

[0073] Therefore, it is advantageous if the hot rolling device arranged upstream of the treatment device has at least one hot rolling stand, in particular a group of hot rolling stands of two or more. Page 11 / 37

[0074] P81042DE

[0075] Different rolling stands can be provided along the conveyor line. For example, rolling stands can be designed as duo, quarto, or sexto rolling stands.

[0076] The cast metallic strip can be hot-rolled into almost any number of different hot-rolled strips if the hot-rolling device arranged upstream of the present treatment device has rolls, in particular working rolls, which have a roll diameter of greater than or equal to 300 mm, preferably greater than or equal to 400 mm and particularly preferably greater than or equal to 500 mm, and / or a roll diameter of less than or equal to 1,200 mm, preferably less than or equal to 1,000 mm and particularly preferably less than or equal to 900 mm.

[0077] As described above, it is advantageous if a primary forming device for the primary forming of the metallic strip is arranged further upstream of the present treatment device, since this allows the casting heat from the casting process of the metallic strip to be used immediately for hot rolling and the subsequent surface treatment of the metallic strip.

[0078] Therefore, it is advantageous if the hot rolling device is arranged between the primary forming device and the present treatment device.

[0079] The forming device can also be designed differently in order to realize the casting rolling line with the device according to the invention.

[0080] A first advantageous embodiment of the primary forming device provides that the primary forming device comprises a twin-roller unit by means of which a pre-strip can be produced as an endless strip, in particular a pre-strip with a page 12 / 37

[0081] P81042DE

[0082] Strip thickness of 0.5 mm or more, preferably 0.8 mm or more and particularly preferably 1.5 mm or more, and / or with a strip thickness of 8 mm or less, preferably 5 mm or less and particularly preferably 3 mm or less.

[0083] This allows even very thin cast and hot-rolled hot strips to be advantageously surface-treated with the present device.

[0084] An alternative advantageous embodiment of the primary forming device provides that the primary forming device comprises a thin slab casting machine by means of which a pre-strip can be produced as a thin slab, in particular a pre-strip with a strip thickness of 30 mm or more, preferably 50 mm or more and particularly preferably 55 mm or more, and / or with a strip thickness of 90 mm or less, preferably 80 mm or less and particularly preferably 75 mm or less.

[0085] This allows, alternatively, the surface treatment of even thicker cast and hot-rolled hot strips using the present device.

[0086] Further thermal treatment options for the metallic strip can be implemented if a tempering device for optionally heating the metallic strip to a hot rolling temperature is arranged further upstream of the proposed treatment device, in particular an induction heating device and / or a tunnel furnace device.

[0087] The temperature control device can be conveniently positioned between the primary forming device and the hot rolling device to allow for a further thermal treatment of the metallic strip before the hot rolling process, if necessary. Page 13 / 37

[0088] P81042DE

[0089] Preferably, the induction heating device is designed as a transverse field induction heating device, which allows the metallic strip to be partially heat-treated effectively.

[0090] For general heat input into the metallic strip, the tunnel furnace device can be used advantageously, wherein the tunnel furnace device is preferably gas-heated or electrically heated.

[0091] If a scale washing device is arranged further upstream of the present treatment device, the metallic strip can be pretreated with regard to its surface as required before it is fed to the cooling device for cooling the metallic strip and / or the surface treatment device of the treatment device proposed here.

[0092] Cumulatively or alternatively, it is advantageous if the present treatment device has a second interface to a coating device for coating the metallic strip with respect to its conveying path, wherein the second interface is arranged downstream of the surface treatment device on the treatment device.

[0093] By means of this second interface, the present treatment device can be integrated cumulatively or alternatively directly into a coating line for coating the metallic strip, in particular directly behind the surface treatment device of the proposed treatment device.

[0094] A second interface is understood to mean that the device can be directly connected to at least one component of a coating device via an uninterrupted material flow, in particular bypassing an intermediate tape storage system. Page 14 / 37

[0095] P81042DE minimum temporal decoupling of the material flow between the device and the coating device.

[0096] Optionally, the device includes a coating device downstream of the surface treatment device in the machine direction.

[0097] The coating device can be designed in a variety of ways to give the metallic strip a protective coating.

[0098] For most applications, it is advantageous if the coating device includes a melt dip coating device and / or an electrolyte coating device and / or a vacuum coating device and / or a plasma coating device.

[0099] The preferably multiply surface-treated metallic strip can be particularly well prepared for a coating process if a further temperature control device is arranged further downstream of the present treatment device, in particular comprising a cooling device, wherein the cooling device is preferably equipped with a laminar cooling section.

[0100] Therefore, it is advantageous if the further temperature control device is arranged between the present treatment device, in particular the surface treatment device thereof, and the coating device.

[0101] In an advantageous embodiment, the further temperature control device can be designed in the form of a heating device, preferably in the form of an induction heating device. Page 15 / 37

[0102] P81042DE

[0103] In another advantageous embodiment, the further temperature control device is encapsulated against the ambient atmosphere and can guide the metallic strip to the entry into the coating device while excluding the ambient atmosphere; in particular, the conveying section associated with the further temperature control device can also be encapsulated against the ambient atmosphere, preferably together with the further temperature control device.

[0104] Furthermore, it is advantageous if another temperature control device for cooling a coating applied to the metallic strip is arranged further downstream of the present treatment device, wherein the other temperature control device is arranged downstream of a coating device for coating the metallic strip.

[0105] This can further improve the quality of the coating on the metallic strip.

[0106] Furthermore, it is advantageous if a cutting device for separating the metallic strip into length-prepared hot strips, in particular into galvanized steel strip segments, is arranged further downstream and / or upstream of the present treatment device, wherein the cutting device preferably comprises a flying shear.

[0107] This can increase the variability in the production of metallic strips.

[0108] If a separating device is arranged upstream of the present treatment device, operational processes on the conveying line can be positively influenced.

[0109] Metallic belts can be advantageously provided at the conveyor line if further downstream of the present load - page 16 / 37

[0110] P81042DE handling device a winding device for winding the metallic strip is arranged .

[0111] The variety of producible metallic strips can be further increased if a dressing roller device is arranged further downstream of the present treatment device.

[0112] In particular, this allows for advantageously achieved tolerances for a finished hot-rolled strip.

[0113] Furthermore, it is advantageous if a stretching and bending device is arranged further downstream of the present treatment device, which further increases the variety of metal strips that can be produced.

[0114] According to a second aspect of the invention, the object of the invention is also solved by a surface treatment device for descaling, in particular for pickling, of a metallic strip, in particular a hot-rolled strip, on a production line for hot-rolling the metallic strip, wherein the surface treatment device has a cooling device, in particular a device according to the first aspect of the invention, by means of which the metallic strip can be cooled down before descaling, in particular to a strip temperature of 70 °C or more and of 120 °C or less.

[0115] If the production line for hot rolling the metallic strip has a surface treatment device with a cooling device, the manufacturing process of the metallic strip can be significantly improved.

[0116] The cooling device is preferably an integral part of the surface treatment device. Page 17 / 37

[0117] P81042DE

[0118] In any case, this can significantly improve a production line for hot rolling a metallic strip.

[0119] The metallic strip can be produced particularly advantageously if the surface treatment device has an interface to a production line for coating the metallic strip with a surface coating.

[0120] An interface to a production line for coating the metallic strip with a surface coating is understood to mean that the device can be directly connected with at least one component of a production line for coating the metallic strip with a surface coating via an uninterrupted material flow, in particular bypassing an intermediate strip storage unit to at least temporarily decouple the material flow between the device and the production line for coating.

[0121] Optionally, the device includes a coating device downstream of the surface treatment device in the machine direction.

[0122] According to a third aspect of the invention, the problem is solved by a cooling device for cooling a metallic strip, in particular a hot-rolled strip, on a production line for coating the metallic strip with a surface coating, wherein the cooling device comprises a surface treatment device, in particular a device according to the first aspect of the invention, by means of which a surface condition change can be carried out on the metallic strip after cooling.

[0123] Does the production line for coating the metallic strip with a surface coating have a cooling device (see page 18 / 37)?

[0124] By using P81042DE, a surface treatment device, the manufacturing process of the metallic strip can be significantly improved.

[0125] The surface treatment device is preferably an integral part of the cooling device.

[0126] In any case, this can significantly improve a production line for coating a metallic strip with a surface coating.

[0127] The production of the metallic strip can be particularly advantageous if the cooling device has an interface to a production line for casting and hot rolling the metallic strip.

[0128] According to a fourth aspect of the invention, the problem is also solved by an arrangement comprising a cooling device of a casting and rolling line and a surface treatment device of a z-coating line, in particular by an arrangement comprising a device according to the first aspect of the invention, wherein the arrangement is arranged on a common production line such that the material strip can be treated simultaneously as an uninterrupted material flow both at the cooling device and at the surface treatment device.

[0129] The arrangement proposed here can significantly improve the production of a wide variety of metallic strips.

[0130] This applies all the more if the arrangement includes the treatment device proposed here for treating a metallic strip. Page 19 / 37

[0131] P81042DE

[0132] According to a fifth aspect of the invention, the problem is solved by a production line for the manufacture and / or processing of a metallic strip, such as a galvanized steel strip, in particular a semi-finished product and / or a pre-product and / or an intermediate product and / or a product made of ferrous, steel and / or a non-ferrous metal material, comprising the treatment device proposed here for the treatment of a metallic strip.

[0133] The production line equipped in this way can significantly improve the manufacture and / or processing of a metallic strip.

[0134] According to a sixth aspect of the invention, the problem is further solved by a method for the continuous treatment of a hot-rolled metallic strip on a conveyor line, in particular for the production of a galvanized steel strip, in which the metallic strip is cooled in the material flow on the one hand to a strip temperature of 70 °C or more and of 120 °C or less and on the other hand is subjected to a surface change by supplying a process fluid and thereby surface treated, in particular using a device according to the first aspect of the invention.

[0135] This process allows for the advantageous production of the metallic strip.

[0136] The process can be carried out simply and advantageously if the metallic strip is guided as a continuous flow of material from an inlet side of the present treatment device to an outlet side of the present treatment device, at least in or within the device according to the invention. Page 20 / 37

[0137] P81042DE

[0138] The process can be further simplified if the metallic strip is continuously cooled and surface-treated.

[0139] In particular, it is advantageous if the metallic strip is cooled for continuous treatment of its strip surface without interrupting the material flow.

[0140] Furthermore, it is advantageous if the metallic strip is moved at a strip speed for continuous treatment which is the same with regard to cooling and surface condition change.

[0141] This allows the metallic strip to be produced continuously.

[0142] It is understood that the belt speed can also differ from each other without being critical with regard to cooling and surface condition changes.

[0143] For example, a deviation of belt speed cooling / belt speed surface treatment of less than or equal to 10% appears uncritical, preferably of less than or equal to 5% and particularly preferably of less than or equal to 3%.

[0144] The present treatment device can be particularly well integrated into a casting-rolling line if the belt speed is less than or equal to 5 m / s, preferably less than or equal to 3 m / s and preferably less than or equal to 2 m / s.

[0145] If the strip surface is descaled to change its surface condition, the metallic strip can be produced to a high quality using the present method. Page 21 / 37

[0146] P81042DE

[0147] The same applies if the strip surface is etched to change the surface state.

[0148] The process can be carried out particularly advantageously if the metallic strip is continuously surface-treated at a strip temperature of 70 °C or more, preferably at 80 °C or more and particularly preferably at 85 °C or more, and / or the metallic strip is continuously treated at a strip temperature of 120 °C or less, preferably at 110 °C or less and particularly preferably at 90 °C or less.

[0149] The production of a wide variety of metallic strips can be easily accomplished using the present method if the metallic strip is cooled and surface-treated with a strip thickness of 3 mm or less, preferably 2 mm or less and particularly preferably 1.5 mm or less.

[0150] Particularly preferred is a strip thickness of 1.0 mm or less, preferably 0.5 mm or less or 0.3 mm or less.

[0151] In particular, a rolled hot strip can be advantageously produced using the method proposed here if the metallic strip is cooled and surface-treated on a single production line, especially on the conveying section thereof.

[0152] The process can be carried out in a particularly compact manner if the metallic strip is surface-treated after cooling with a delay of, in particular, a maximum of 60 s or less, preferably 30 s or less, and particularly preferably 10 s or less. Page 22 / 37

[0153] P81042DE

[0154] In particular, this can prevent unfavorable heat losses between the cooling of the metallic strip and its surface treatment.

[0155] According to a seventh aspect of the invention, the problem is solved by using a surface treatment device for a metallic strip for the simultaneous cooling of the metallic strip.

[0156] In particular, the production of a metallic strip can be significantly improved through such use.

[0157] According to an eighth aspect of the invention, the problem is solved by using a cooling device for cooling a metallic strip while simultaneously changing the surface state of the metallic strip.

[0158] This can also significantly improve the production of a metallic strip.

[0159] Further advantages, details and features of the invention will also become apparent from the exemplary examples explained below.

[0160] Components which are at least essentially identical in their function in the individual figures may be marked with the same reference symbols, whereby the components do not have to be referenced and explained in all figures.

[0161] The drawing shows:

[0162] Figure 1: Schematic view of a treatment device for treating a metallic strip with a cooling device for cooling the metallic strip and with a behind it. Page 23 / 37

[0163] P81042DE arranged surface treatment device for changing a surface condition on the metallic strip;

[0164] Figure 2: schematically a view of a first embodiment of a combined continuously operated casting, rolling, annealing and galvanizing line (production line) with the treatment device shown in Figure 1; and with a primary forming device comprising a thin slab casting machine in the input area of ​​the production line; and

[0165] Figure 3: schematically a view of another exemplary embodiment of a combined continuously operated endless casting, rolling, annealing and galvanizing line (production line) with the treatment device shown in Figure 1 and with a primary forming device having a twin roller device in the entrance area of ​​the production line.

[0166] The device 1 shown in Figure 1 for treating a metallic strip 2, hereinafter also referred to as treatment device 1, has a machine direction 4.

[0167] The treatment device 1 has a conveying section 6 (shown as a dashed line) along which the metallic strip 2 is conveyed through the treatment device 1 in the machine direction 4.

[0168] The metallic strip 2 is a hot-rolled metallic strip (not again specifically referred to).

[0169] The treatment device 1 is further characterized by a cooling device 8 for cooling the metallic strip 2 and by a surface treatment device 10 for changing a surface condition of the metallic strip 2. Page 24 / 37

[0170] P81042DE

[0171] Therefore, the present treatment device 1 is suitable for cooling the metallic strip 2 in a continuous material flow and subjecting it to surface treatment.

[0172] In this illustrated example, both processes take place within the treatment device 1, without the metallic strip 2 being temporarily stored in any way.

[0173] For this purpose, the surface treatment device 10 is arranged on the treatment device 1 in machine direction 4 downstream of the cooling device 8.

[0174] More precisely, the cooling device 8 and the surface treatment device 10 are arranged at a distance 12 of less than 2 m from each other.

[0175] The cooling device 8 is designed here as a hot strip cooling device (not again separately referred to) for cooling the metallic strip 2 .

[0176] In any case, the conveyor section 6 is set up to continuously convey the metallic strip 2 in conveying direction 6A (corresponding to machine direction 4), so that the metallic strip 2 can be conveyed through the cooling device 8 and the surface treatment device 10 with a continuous forward movement.

[0177] The surface treatment device 10 is a turbulence pickling device (not again referred to separately).

[0178] In order to optimally utilize the potential of the present treatment device 1, the treatment device 1 has a first interface 14 to a hot rolling device 16 (see Figures 2 and 3) with respect to the conveying path 6, wherein the first interface 14 is located with respect to the machine direction 4 (page 25 / 37)

[0179] P81042DE is arranged upstream of the cooling device 8 on the treatment device 1, i.e. at the input 18 of the treatment device 1.

[0180] In this context, the treatment device 1 has a second interface 20 to a coating device 22 for coating the metallic strip 2 with respect to the conveying section 6, wherein the second interface 20 is arranged downstream of the surface treatment device 10 on the treatment device 1, i.e. at the output 24 of the treatment device 1.

[0181] The present treatment device 1 can be used on different production lines 26 .

[0182] As for example, in the combined continuously endless casting, rolling, z-, annealing and galvanizing line (not further specified) shown in Figure 2, with a primary forming device 30 comprising a thin slab casting machine 28 in the input area 32 of a first production line 26; or as for example, in the combined continuously endless casting, rolling, z-, annealing and galvanizing line (not further specified) shown in Figure 3, with an alternative primary forming device 30 comprising a twin roller device 34 in the input area 32 of an alternative production line 26.

[0183] Production line 26 has a first sub-line upstream of treatment device 1 consisting of a casting-rolling line 26A and a further sub-line downstream of treatment device 1 consisting of an annealing-galvanizing line 26B .

[0184] The treatment device 1 functions as an aggregate unit 36 ​​for connecting these two partial lines. Page 26 / 37

[0185] P81042DE

[0186] Therefore, the conveying section 6 of the cooling device 8 and the surface treatment device 10, i.e., of the entire treatment device 1, is also a section (not again referred to) of the common production line 26.

[0187] The production line 26 shown in Figure 2 has, in addition to the devices already explained in front of the hot rolling device 16, a front tempering device 38 for optionally heating the metallic strip 2, in particular for heating to an optimal hot rolling temperature.

[0188] Further downstream of the treatment device 1, another temperature control device 40 is arranged, which is located between the surface treatment device 10 and the coating device 20.

[0189] In addition, another temperature control device 42 is arranged for cooling a coating applied to the metallic strip 2 by means of the coating device 20.

[0190] To separate the metallic strip 2 into length-prepared hot strips, the arrangement 50 has a separating device 46 in front of the exit area 44, before these can be wound up by a winding device 48.

[0191] A separating device can also be arranged cumulatively upstream of the hot rolling device 16 as required, in order to make operating processes on the production line 26 even more flexible and / or safer.

[0192] The treatment device 1, acting here as aggregate unit 36, also embodies in particular an arrangement 50 consisting of a cooling device 8, which, for example, is assigned to the first sub-line - page 27 / 37

[0193] P81042DE may be ordered, while the surface treatment device 10 may be considered to belong to the second sub-line.

[0194] It should be explicitly noted at this point that the features of the solutions described above or in the claims and / or figures can also be combined, if necessary, to implement or achieve the described features, effects, and advantages in a cumulative manner. It is understood that the exemplary embodiments described above represent only a first embodiment of the invention. Therefore, the embodiment of the invention is not limited to these exemplary embodiments.

[0195] Page 28 / 37

[0196] P81042DE

[0197] Reference symbol list

[0198] 1 Device for treating a metallic strip

[0199] 2 metallic strip, hot strip

[0200] 4 Machine direction

[0201] 6 Conveyor section

[0202] 8 Cooling device

[0203] 10 Surface treatment device

[0204] 12 distance

[0205] 14 first interface

[0206] 16 Hot rolling device

[0207] 18 Entrance

[0208] 20 second interface

[0209] 22 Coating device

[0210] 24 Exit

[0211] 26 production line

[0212] 26A Casting - Rolling - Line

[0213] 26B Coating line

[0214] 28 Thin slab casting machine

[0215] 30 Primary forming device

[0216] 32 Entrance area

[0217] 34 Twin-Roller Equipment

[0218] 36 connecting aggregate unit

[0219] 38 front temperature control device

[0220] 40 additional temperature control devices

[0221] 42 other temperature control devices

[0222] 44 From the entrance area

[0223] 46 Separating device

[0224] 48 Winding device

[0225] 50 Arrangement

Claims

Page 29 / 37 P81042DE Patent claims 1. Device (1) for treating a metallic strip (2), in particular a hot-rolled metallic strip, comprising a machine direction (4) along which the metallic strip (2) can be conveyed on a conveying section (6), a cooling device (8) for cooling the metallic strip (2), a surface treatment device (10) for changing a surface condition on the metallic strip (2), wherein the surface treatment device (10) is arranged downstream of the cooling device (8) in the machine direction (4), and a coating device (22), wherein the coating device (22) is arranged downstream of the surface treatment device (10) in the machine direction (4).

2. Device (1) according to claim 1, characterized in that the cooling device (8) and the surface treatment device (10) are arranged spaced apart from each other at a distance (12) of 50 m or less, preferably 25 m or less, preferably 10 m or less, more preferably 5 m or less and particularly preferably 2 m or less.

3. Device (1) according to claim 1 or 2, characterized in that the cooling device (8) has a hot strip cooling device for cooling a metallic hot strip (2), in particular starting from a strip temperature of 700 °C or more, preferably 720 °C or more and particularly preferably 750 °C or more, and / or with a strip temperature of 950 °C or less, preferably 900 °C or less and particularly 800 °C or less.

4. Device (1) according to one of claims 1 to 3, characterized in that the surface treatment device (10) comprises at least one chemically operating surface treatment device and / or one ultrasonic surface treatment device and / or one mechanically operating -29- Page 30 / 37 P81042DE surface treatment device comprising, in particular a chemically operating descaling device, in particular a pickling device, preferably a turbulence pickling device.

5. Device (1) according to one of claims 1 to 4, characterized in that the conveying section (6) of the cooling device (8) and the surface treatment device (10) is a section of a common production line (26) for casting and rolling the metallic strip (2) on the one hand and for coating the metallic strip (2) on the other.

6. Device (1) according to one of claims 1 to 5, characterized in that the device (1) is a connecting aggregate unit (36) on a production line (26) for connecting a casting-rolling line (26A) and a coating line (26B), in particular an annealing-galvanizing line.

7. Device (1) according to one of claims 1 to 6, characterized in that the device (1) has a first interface (14) to a hot rolling device (16) with respect to its conveying section (6), wherein the first interface (14) is arranged upstream of the cooling device (8) on the device (1) with respect to the machine direction (4).

8. Device (1) according to claim 7, characterized in that the hot rolling device (16) arranged upstream of the device (1) has at least one hot rolling stand, in particular a group of hot rolling stands of two or more hot rolling stands.

9. Device (1) according to claim 7 or 8, characterized in that the hot rolling device (16) arranged upstream of the device (1) has rolls, in particular work rolls, which have a roll diameter of greater than or equal to 300 mm, preferably greater than or equal to 400 mm and particularly preferably greater than or equal to 500 mm, and / or a roll diameter of less than or equal to 1,200 mm, preferably of - 30- Page 31 / 37 P81042DE less than or equal to 1,000 mm and particularly preferably less than or equal to 900 mm.

10. Device (1) according to one of claims 1 to 9, characterized in that a primary forming device (30) for primary forming the metallic strip (2) is arranged further upstream of the device (1).

11. Device (1) according to claim 10, characterized in that the primary forming device (30) comprises a twin roller device (34) by means of which a pre-strip can be produced as an endless strip, in particular a pre-strip with a strip thickness of 0.5 mm or more, preferably 0.8 mm or more and particularly preferably 1.5 mm or more, and / or with a strip thickness of 8 mm or less, preferably 5 mm or less and particularly preferably 3 mm or less.

12. Device (1) according to claim 10, characterized in that the primary forming device (30) comprises a thin slab casting machine (28) by means of which a pre-strip can be produced as a thin slab, in particular a pre-strip with a strip thickness of 30 mm or more, preferably 50 mm or more and particularly preferably 55 mm or more, and / or with a strip thickness of 90 mm or less, preferably 80 mm or less and particularly preferably 75 mm or less.

13. Device (1) according to one of claims 1 to 12, characterized in that a tempering device (38) for optionally heating the metallic strip (2) to a hot rolling temperature is arranged further upstream of the device (1), in particular an induction heating device and / or a tunnel furnace device.

14. Device (1) according to one of claims 1 to 13, characterized in that a scale washing device is arranged further upstream of the device (1). Page 32 / 37 P81042DE 15. Device (1) according to one of claims 1 to 14, characterized in that the device (1) has a second interface (20) to a coating device (22) for coating the metallic strip (2) with respect to its conveying section (6), wherein the second interface (20) is arranged downstream of the surface treatment device (10) on the device (1).

16. Device (1) according to claim 15, characterized in that the coating device (22) comprises a hot-dip coating device and / or an electrolyte coating device and / or a vacuum coating device and / or a plasma coating device.

17. Device (1) according to one of claims 1 to 16, characterized in that a further temperature control device (40) is arranged further downstream of the device (1), in particular comprising a cooling device, wherein the cooling device is preferably equipped with a laminar cooling section.

18. Device (1) according to claim 17, characterized in that the further temperature control device (40) is arranged between the device (1), in particular the surface treatment device (10) thereof, and the coating device (22).

19. Device (1) according to one of claims 1 to 18, characterized in that further downstream of the device (1) another temperature control device (42) for cooling a coating applied to the metallic strip (2) is arranged, wherein the other temperature control device (42) is arranged downstream of a coating device (22) for coating the metallic strip (2).

20. Device (1) according to one of claims 1 to 19, characterized in that a separating device (46) for separating the metal- is further downstream and / or upstream of the device (1). Page 33 / 37 P81042DE lischen Band (2) in length-prepared hot-rolled strips, in particular in galvanized steel strip segments, wherein the cutting device (46) preferably comprises a flying shear.

21. Device (1) according to one of claims 1 to 20, characterized in that further downstream of the device (1) a winding device (48) for winding the metallic strip (2) is arranged.

22. Device (1) according to one of claims 1 to 21, characterized in that a tempering roller device is arranged further downstream of the device (1).

23. Device (1) according to one of claims 1 to 22, characterized in that a stretching and bending device is arranged further downstream of the device (1).

24. Surface treatment device (10) for descaling, in particular for pickling, of a metallic strip (2), in particular a hot-rolled strip, on a production line (26) for hot-rolling the metallic strip (2), wherein the surface treatment device (10) has a cooling device (8), in particular a device according to one of claims 1 to 23, by means of which the metallic strip (2) can be cooled down before descaling, in particular to a strip temperature of 70°C or more and of 120°C or less.

25. Surface treatment device (10) according to claim 24, characterized in that the surface treatment device (10) has an interface (20) to a production line (26) for coating the metallic strip (2) with a surface coating.

26. Cooling device (8) for cooling a metallic strip (2), in particular a hot-rolled strip, on a production line (26) for coating the metallic strip (2) with - 33- Page 34 / 37 P81042DE of a surface coating, wherein the cooling device (8) comprises a surface treatment device (10), in particular a device according to one of claims 1 to 23, by means of which a surface condition change can be carried out after cooling on the metallic strip (2).

27. Cooling device (8) according to claim 26, characterized in that the cooling device (8) has an interface (14) to a production line (26) for casting and hot rolling the metallic strip (2).

28. Arrangement (50) comprising a cooling device (8) of a casting and rolling line and a surface treatment device (10) of a pickling and coating line, in particular an arrangement comprising a device according to one of claims 1 to 23, characterized in that the arrangement (50) is arranged on a common production line (26) such that the material strip (2) can be treated simultaneously as an uninterrupted material flow at both the cooling device (8) and the surface treatment device (10).

29. Production line (26) for the manufacture and / or processing of a metallic strip (2), in particular a galvanized steel strip, in particular a semi-finished product and / or a pre-product and / or an intermediate product and / or a product made of ferrous, steel and / or a non-ferrous metal material, comprising a device (1) for the treatment of a metallic strip (2) according to any one of claims 1 to 23.

30. Method for the continuous treatment of a hot-rolled metallic strip (2) on a conveying line (6), in particular for the production of a galvanized steel strip, in which the metallic strip (2) is cooled in the material flow on the one hand to a strip temperature of 70° 0 or more and of 120° 0 or less and on the other hand is subjected to a surface state change by supplying a process fluid and thereby - 34- Page 35 / 37 P81042DE is surface treated, in particular using a device according to one of claims 1 to 23.

31. Method according to claim 30, characterized in that the metallic strip (2) is continuously cooled and surface-treated.

32. Method according to claim 30 or 31, characterized in that the metallic strip (2) is moved for continuous treatment at a strip speed which is the same with regard to cooling and surface condition change.

33. Method according to claim 32, characterized in that the belt speed is less than or equal to 5 m / s, preferably less than or equal to 3 m / s and preferably less than or equal to 2 m / s.

34. Method according to one of claims 30 to 33, characterized in that the strip surface is descaled to change the surface condition.

35. Method according to one of claims 30 to 34, characterized in that the strip surface is pickled to change the surface condition.

36. Method according to one of claims 30 to 35, characterized in that the metallic strip (2) is continuously surface-treated at a strip temperature of 70°C or more, preferably at 80°C or more and particularly preferably at 85°C or more, and / or the metallic strip (2) is continuously surface-treated at a strip temperature of 120°C or less, preferably at 110°C or less and particularly preferably at 90°C or less.

37. Method according to one of claims 30 to 36, characterized in that the metallic strip (2) with a strip thickness of 3 mm or less is cooled and surface-treated, - 35- Page 36 / 37 P81042DE preferably of 2 mm or less and particularly preferably of 1.5 mm or less.

38. Method according to one of claims 30 to 37, characterized in that the metallic strip (2) is cooled and surface-treated on a single production line (26), in particular the conveying section (6) thereof.

39. Method according to any one of claims 30 to 38, characterized in that the metallic strip (2) is surface treated after cooling with a delay of 60 s or less, preferably 30 s or less and particularly preferably 10 s or less.

40. Use of a surface treatment device (10) of a metallic strip (2) according to claim 24 or 25 for simultaneously cooling the metallic strip (2).

41. Use of a cooling device (8) for cooling a metallic strip (2) according to claim 26 or 27 for simultaneously changing the surface condition of the metallic strip (2). - 36-

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