Combined casting and rolling plant for primary shaping of metal rolling stock and hot rolling a strip of material, and method for the primary shaping of metal rolling stock and for direct hot rolling

Abstract

The invention relates to a combined casting and rolling plant for hot rolling a strip of material conveyed along a conveying path in a conveying direction, comprising: • a casting device for continuously casting the strip of material, • a hot-rolling train for hot rolling the strip of material with at least one hot-rolling stand, wherein • the casting device has a casting width of greater than or equal to 2000 mm, preferably greater than or equal to 2200 mm and particularly preferably greater than or equal to 2400 mm.

Description

[0001] Page 1 / 34Applicant: SMS group GmbHOur reference: P80958WODecember 20, 2024Casting and rolling plant for primary forming a metallic rolled stock and hot rolling a material strip, as well as a method for primary forming a metallic rolled stock and for direct hot rolling. The invention relates to a casting and rolling plant for primary forming a metallic rolled stock and hot rolling a material strip conveyed along a conveyor line in the conveying direction, comprising a casting device for continuously casting the metallic rolled stock and a hot rolling mill for hot rolling the material strip from the metallic rolled stock with at least one hot rolling stand. The invention further relates to a method for primary forming a metallic rolled stock and for direct hot rolling a material strip from the metallic rolled stock conveyed along a conveyor line in the conveying direction. Casting and rolling plants of this type and associated methods are known from the prior art.The invention is based on the object of providing an improvement or an alternative to the prior art. The object of the invention is achieved by a casting-rolling plant for primary forming of a metallic rolling stock and hot rolling of a material strip conveyed along a conveyor line in the conveying direction, comprising: Page 2 / 34 P80958WO ^casting device for continuously casting the metallic rolling stock, ^a hot rolling train for hot rolling the material strip from the metallic rolling stock with at least one hot rolling stand, wherein ^the casting device has a casting width of greater than or equal to 2,000 mm, preferably greater than or equal to 2,200 mm and particularly preferably greater than or equal to. 2.400 mm.The present invention proposes a casting and rolling plant with a casting width of the casting device of greater than or equal to 2,000 mm. During the rolling of a metallic rolled stock, the rolled material widens. This widening depends on the thickness reduction during rolling and / or the width-to-thickness ratio of the rolled material. With the casting and rolling plant proposed here, a particularly advantageous width of the finished rolled material strip can be achieved. The hot rolling mill preferably has two, three, four, five, six, seven, or more hot rolling stands. A casting width of a metallic rolled stock designed to be cast with the casting machine can be greater than or equal to 2,100 mm, preferably greater than or equal to 2,170 mm or greater than or equal to 2,270 mm, preferably greater than or equal to 2,300 mm or greater than or equal to 2,370 mm, particularly preferably greater than or equal to 2,500 mm or greater than or equal to 2,650 mm.Page 3 / 34 P80958WO Optionally, the casting device has a casting width of less than or equal to 3,500 mm, preferably less than or equal to 3,000 mm and particularly preferably less than or equal to. 2.800 mm.Furthermore, the casting width of a metallic rolled stock designed to be cast using the casting machine can be less than or equal to 3,250 mm, preferably less than or equal to 2,900 mm or less than or equal to 2,850 mm, preferably less than or equal to 2,750 mm or less than or equal to 2,700 mm, particularly preferably less than or equal to 2,650 mm or less than or equal to 2,600 mm. The casting device preferably has a casting thickness of greater than or equal to 90 mm, preferably greater than or equal to 100 mm, and particularly preferably greater than or equal to 120 mm. Optionally, the casting thickness can be greater than or equal to 140 mm, preferably greater than or equal to 160 mm, and particularly preferably greater than or equal to 180 mm. Further preferably, the casting device has a casting thickness of less than or equal to 200 mm, preferably less than or equal to 180 mm, and particularly preferably less than or equal to 160 mm.The casting thickness for the metallic rolled stock designed to be cast with the casting machine can be less than or equal to 140 mm, preferably less than or equal to 120 mm, and particularly preferably less than or equal to 100 mm. According to a preferred embodiment, the casting device is configured to cast a casting cross-section of greater than or equal to 0.16 m², preferably greater than or equal to 0.18 m², and particularly preferably greater than or equal to 0.2 m². Page 4 / 34 P80958WO If the casting device arranged upstream of the hot rolling mill is capable of casting such large casting cross-sections, correspondingly large-cross-section material strips can be produced significantly more cost-effectively on the casting-rolling plant. The casting cross-section results from the set outlet opening (width times height) at the exit of the casting device. In this respect, the invention relates to the production of hot strip and heavy plate.Until now, such large-sized hot strips or heavy plates could not be produced in a casting and rolling mill. However, the direct use of the still-hot metallic rolled stock in the hot rolling mill, as proposed here, is more energy-efficient, since the "casting heat" from the casting device can be used for the required rolling process. In known heavy plate mills or Steckel plate mills, slabs with a maximum thickness of 450 mm down to a strip thickness of 150 mm are cast in a first step. These are usually temporarily stored in a slab storage facility in a second step and then reheated in a third step, for example, in a walking-beam furnace, a pusher furnace, or the like. Only then is the reheated slab rolled, particularly finish-rolled, in a one- or two-stand hot rolling mill.For example, sheets with final thicknesses greater than or equal to 25 mm have not yet been produced on casting and rolling lines. For a heavy plate line, however, thin and narrow products are sometimes critical to manufacture due to the unfavorable width ratio and / or roll diameter. Page 5 / 34 P80958WO Furthermore, the production output of the heavy plate line of both dimensions is significantly reduced, making the economic viability of a heavy plate line even less efficient for thin and narrow products. In the present casting and rolling line, the thermal energy introduced into the metallic rolling stock during casting, i.e., the casting heat, can be advantageously used for subsequent rolling processes, since the casting device and rolling mill work together "inline" on a single conveyor line. The term "casting and rolling line" in the sense of the invention describes a plant for producing material strips in which a casting device and a hot rolling mill or hot rolling mill are integrated.Hot rolling stands of the latter are arranged inline on the conveyor line, and a material strip with a width of greater than or equal to 2,000 mm can be produced. Advantageously, the hot rolling mill, in particular the at least one hot rolling stand thereof, can thus be immediately fed with the metallic rolling stock from the casting device, thereby avoiding intermediate storage, during which the metallic rolling stock disadvantageously cools down or cools down. In this respect, the metallic rolling stock does not need to be reheated before designated hot rolling, in particular not starting at temperatures below 100 °C, sometimes with high energy expenditure, but its inherent casting temperature, also referred to as the "first heat," can still be used for hot rolling. In this respect, the casting-rolling plant according to the invention can be operated much more efficiently in terms of energy, in particular with regard to a casting cross-section of greater than or equal to 0.16 m².Page 6 / 34 P80958WO Such direct hot rolling using the first heat can be particularly advantageous if the metallic rolling stock and / or the material strip is conveyed essentially only forwards along the conveyor line, i.e. unidirectionally, whereby the term “forwards” should be understood in the casting direction. In this respect, it is advantageous if the conveyor line is set up for unidirectional processing, in particular with a view to a direct combination of casting and hot rolling. In other words, the term “unidirectional” in the sense of the invention describes a movement of the material strip along the conveyor line exclusively in the conveying direction (main conveying direction), whereby directional adjustments are possible as long as a movement component of the movement of the material strip points in the conveying direction, i.e. not opposite to the conveying direction.In particular, unidirectional hot rolling can be implemented particularly easily if the material strip can be hot-rolled in the conveying direction, bypassing a reversible device, in particular a reversible hot rolling stand. In any case, the present casting-rolling plant is characterized by a significantly better temperature gradient of the metallic rolling stock and / or the material strip over the length of its casting and rolling section than is possible with conventional heavy plate plants. Furthermore, significantly longer strip products can be produced if the material strip is cast and rolled inline, since the material strip does not have to be shortened for intermediate storage, for example, in order to be able to remove it from the casting-rolling line. Page 7 / 34 P80958WO In any case, the present casting-rolling plant can advantageously process both "endless" material strips, i.e., hot strips orSemi-finished products or the like, which can be wound up at the exit of the casting-rolling plant, as well as flat material plates, can be produced. Optionally, the casting cross-section of the casting device is greater than or equal to 0.3 m2, preferably greater than or equal to 0.35 m2, and particularly preferably greater than or equal to 0.4 m2 or greater than or equal to 0.45 m2. Furthermore, the casting cross-section of the casting device is advantageously greater than or equal to 0.5 m2, preferably greater than or equal to 0.55 m2, and particularly preferably greater than or equal to 0.6 m2 or greater than or equal to 0.7 m2. The casting thickness for the metallic rolled stock that can be designed and cast with the casting machine is advantageously greater than or equal to 90 mm, preferably greater than or equal to 100 mm, furthermore preferably greater than or equal to 120 mm, preferably greater than or equal to 140 mm, and particularly preferably greater than or equal to 160 mm.Both casting processes and hot rolling processes, in particular indirect combinations with one another, on the single conveyor line (casting and rolling line) of the casting-rolling plant can still be very well controlled if the casting device is designed to cast a casting cross-section of less than or equal to 0.9 m2, preferably less than or equal to 0.8 m2 and particularly preferably less than or equal to 0.7 m2. With regard to the capacity of the present casting-rolling plant, it is particularly advantageous if the hot rolling train, in particular of the at least one hot rolling stand thereof, has a hot rolling width of greater than or equal to 2,000 mm, preferably greater than or equal to 2,200 mm and particularly preferably greater than or equal to 2,400 mm. Page 8 / 34 P80958WO This allows even very wide material strips to be produced energy-efficiently. Optionally, the hot rolling mill has a processing or hot rolling width of greater than or equal to 2.100 mm for processing the material strip, preferably greater than or equal to 2,300 mm and particularly preferably greater than or equal to 2,500 mm. Preferably, the hot rolling mill has a processing or hot rolling width of greater than or equal to 2,350 mm for processing the material strip, preferably greater than or equal to 2,450 mm or greater than or equal to 2,550 mm and particularly preferably greater than or equal to 2,600 mm or greater than or equal to 2,800 mm and further preferably greater than or equal to 3,000 mm. The hot rolling mill can advantageously have two, three, four, five, six, seven or more rolling stands. Each hot rolling stand can have a separate pair of work rolls for processing the metallic rolling stock.If the hot rolling mill in question has a hot rolling width of less than or equal to 3,500 mm, preferably less than or equal to 3,000 mm and particularly preferably less than or equal to 2.800 mm, the material strips can still be easily handled in a continuous casting and rolling process. The cast metallic rolled stock can be advantageously processed on the casting and rolling plant with regard to the utilization of thermal energy from the casting process if the casting device is configured to have a casting speed of greater than or equal to 1.0 m / min, preferably greater than or equal to 1.2 m / min, and particularly preferably greater than or equal to 1.4 m / min. Page 9 / 34 P80958WO The casting device is preferably configured for casting speeds of greater than or equal to 1.7 m / min, preferably greater than or equal to 2.0 m / min or greater than or equal to 2.5 m / min, and particularly preferably greater than or equal to 3.0 m / min. It has been found that a casting speed of 4 m / min or more is particularly advantageous with regard to the present rolling and casting plant.In this context, it should also be mentioned that casting processes and hot rolling processes directly following them can be easily controlled together if the casting device is set up to have a casting speed of less than or equal to 6 m / min, preferably less than or equal to 5.5 m / min and particularly preferably less than or equal to 5 m / min. Preferably, the casting device is set up for casting speeds of less than or equal to 5.75 m / min, preferably less than or equal to 5.25 m / min or less than or equal to 4.75 m / min and particularly preferably less than or equal to 4.5 m / min.A particularly advantageous output rate of finish-rolled and such wide metallic rolling stock can be achieved if the hot rolling mill, with respect to the at least one hot rolling stand, is configured to have an exit speed of greater than or equal to 10.0 m / min, preferably greater than or equal to 40 m / min, and particularly preferably greater than or equal to 60 m / min. Preferably, the exit speed of the last hot rolling stand has a value of greater than or equal to 80 m / min, preferably greater than or equal to 100 m / min, further preferably greater than or equal to 150 m / min, and particularly preferably greater than or equal to 200 m / min. Page 10 / 34 P80958WOThe metallic rolling stock with a width of 2.000 mm or more can be reliably moved and rolled along the conveyor line in the conveying direction if the exit speed of the last hot rolling stand is selected to be less than or equal to 900 m / min, preferably less than or equal to 750 m / min and particularly preferably less than or equal to 600 m / min. The exit speed of the last hot rolling stand preferably has a value of less than or equal to 500 m / min, preferably less than or equal to 400 m / min, further preferably less than or equal to 300 m / min and particularly preferably less than or equal to 200 m / min. In order to still be able to achieve very good rolling quality on the metallic rolling stock at the proposed exit speeds, it is advantageous if at least one hot rolling stand is equipped with finishing work rolls. The metallic rolling stock can have a strip width of 2.000 mm or more can advantageously be hot-rolled on the at least one hot rolling stand of the present hot rolling mill if the hot rolling mill, with respect to the at least one hot rolling stand, has a roll gap with a height of less than or equal to 200 mm, preferably less than or equal to 180 mm and particularly preferably less than or equal to 160 mm. The roll gap of the first hot rolling stand preferably has a height of less than or equal to 140 mm, further preferably less than or equal to 130 mm, preferably less than or equal to 120 mm and particularly preferably less than or equal to 100 mm. The situation is similar if the hot rolling mill, with respect to the at least one hot rolling stand, has a roll gap with a height of greater than or equal to 90 mm, preferably greater than or equal to 100 mm and particularly preferably greater than or equal to 120 mm.Page 11 / 34 P80958WO Furthermore, a variety of advantageous strip thicknesses can be achieved downstream of the hot rolling device if the roll gap of the first hot rolling stand has a height of greater than or equal to 110 mm, 125 mm, 130 mm, 135 mm or greater, such as greater than or equal to 140 mm or 160 mm. It should be expressly noted that the roll gap specified here does not necessarily mean a stand rise of a rolling stand, but can be understood. The stand rise refers to the value that describes the maximum mechanically adjustable or achievable distance between the work rolls of a rolling stand without modifications. As a rule, the maximum roll gap is smaller than the maximum stand rise. The first hot rolling stand preferably has a maximum stand rise in the conveying direction of less than or equal to 220 mm, preferably less than or equal to 200 mm, and particularly preferably less than or equal to 180 mm.Preferably, the maximum stand rise of the first hot rolling stand has a height of less than or equal to 170 mm, further preferably less than or equal to 160 mm, preferably less than or equal to 150 mm, and particularly preferably less than or equal to 140 mm. Furthermore, the first hot rolling stand preferably has a maximum stand rise in the conveying direction of greater than or equal to 110 mm, preferably greater than or equal to 120 mm, and particularly preferably greater than or equal to 140 mm. In the case of several hot rolling stands arranged on the hot rolling mill, the proposed values ​​regarding the stand rise relate in particular to the upstream hot rolling stand, i.e. the hot rolling stand arranged facing the casting device.Furthermore, it is advantageous if the hot rolling mill is set up for hot rolling the material strip to a run-out thickness of greater than or equal to 1.6 mm, preferably greater than or equal to 2 mm, and particularly preferably greater than or equal to 3.2 mm. In particular, a run-out thickness of greater than or equal to 4.5 mm can be provided, preferably greater than or equal to 6 mm or greater than or equal to 8 mm, and particularly preferably greater than or equal to 10 mm. This makes it possible to produce economically particularly interesting material strips, in particular heat-treated strips, which can be immediately wound into a coil at the exit of the casting-rolling plant.If the present hot rolling mill is set up for hot rolling the material strip from the metallic rolling stock to a run-out thickness of less than or equal to 60 mm, preferably less than or equal to 55 mm, and particularly preferably less than or equal to 50 mm, then thicker material strips and thicker material plates can be produced at the same time. With a run-out thickness, particularly in the range of 40 mm, 45 mm, or the like, even thicker material strip plates can be easily produced on the present casting and rolling plant. In any case, within the meaning of the invention, a take-off ratio of a cast, still unrolled metallic rolling stock and the finish-rolled material strip of greater than or equal to 1.5 to 1, preferably greater than or equal to 2 to 1, or greater than or equal to 10 to 1, and particularly preferably greater than or equal to 25 to 1 can be achieved.In some embodiments, a reduction ratio of greater than or equal to 100 to 1 or even greater than or equal to 120 to 1 can be achieved. Page 13 / 34 P80958WO The possibilities for producing different material strips can be further improved in the present case if the hot rolling mill consists of a roughing mill comprising at least one roughing stand, in particular comprising two, three or more roughing stands, and a finishing mill comprising at least one finishing stand. In particular, the roughing mill can have a roll gap with a height of less than or equal to 180 mm, preferably less than or equal to 160 mm and particularly preferably less than or equal to 150 mm, and / or with a height of greater than or equal to 80 mm, preferably greater than or equal to 100 mm and particularly preferably greater than or equal to. 120 mm.Alternatively, the roughing mill can have at least two roughing stands, which can be configured for purely unidirectional rolling of the metallic rolled stock. The roughing mill can have a processing or roughing width of greater than or equal to 2,200 mm for processing the metallic rolled stock, preferably greater than or equal to 2,300 mm and particularly preferably greater than or equal to 2,400 mm. Advantageously, the processing or roughing width of the roughing mill corresponds to that of the hot rolling mill. The roughing mill for roughing the metallic rolled stock can be configured for an exit thickness of greater than or equal to 15 mm, preferably greater than or equal to 20 mm, preferably greater than or equal to 30 mm and particularly preferably greater than or equal to 40 mm.Furthermore, the roughing train can be set up for an exit thickness of less than or equal to 100 mm, preferably less than or equal to 90 mm, preferably less than or equal to 80 mm and particularly preferably less than or equal to. 70 mm. A roughing stand can comprise at least one pair of work rolls with work rolls having a work roll barrel width of greater than or equal to 2,000 mm, preferably greater than or equal to 2,200 mm and particularly preferably greater than or equal to 2,400 mm. A roughing stand can comprise at least one pair of work rolls with work rolls having a work roll barrel width of less than or equal to 3,500 mm, preferably less than or equal to 3,000 mm and particularly preferably less than or equal to 2.800 mm.For example, a six-stand finishing mill can be used cumulatively or alternatively on the hot rolling mill. The roughing mill and the finishing mill can be decoupled from each other on the common conveyor line such that the roughing mill stands of the roughing mill can be operated at maximum mass flow. The arrangement of aging areas with tempering functions, in particular with homogenization functions, can be provided between the roughing mill and the finishing mill. For example, a separating device for separating the metallic rolling stock can be arranged between the casting device and the hot rolling mill, in particular the at least one hot rolling stand thereof, so that the cast metallic rolling stock can be cut to any desired length before entering the hot rolling mill, for example, into slabs.Page 15 / 34 P80958WO In particular, the use of the separation device enables decoupled operation of the present casting and rolling plant, i.e., a temporary decoupling of casting and rolling at the casting and rolling plant. In this respect, either continuous, compact casting and rolling operation (endless mode or semi-endless mode) or decoupled casting and rolling operation (batch mode) can be realized at the casting and rolling plant. For casting and rolling plants with a separation device between the casting device and the hot rolling mill, it is advantageous if the casting device and the hot rolling mill, in particular the at least one hot rolling stand thereof, are spaced apart inline along the conveyor line by a distance of less than or equal to 150 m, preferably less than or equal to 120 m, and particularly preferably less than or equal to 90 m.The distance between the casting device and the hot rolling mill is preferably greater than or equal to 20 m, preferably greater than or equal to 30 m, and particularly preferably greater than or equal to 70 m. Furthermore, it is advantageous if the casting device and the hot rolling mill, in particular the at least one hot rolling stand thereof, are spaced apart inline along the conveyor line by less than or equal to 70 m, preferably less than or equal to 60 m, and particularly preferably less than or equal to 50 m. Such a distance between the casting device and the hot rolling mill can reduce the risk of heat loss from the metallic rolling stock, while at the same time still providing sufficient installation space to arrange additional processing devices on the conveyor line upstream of the hot rolling mill.Page 16 / 34 P80958WOW If the casting device and the hot rolling mill, in particular the at least one hot rolling stand thereof, are spaced apart inline along the conveyor line by a distance of greater than or equal to 10 m, preferably greater than or equal to 25 m, and particularly preferably greater than or equal to 30 m, one or more processing devices can be arranged on the common conveyor line upstream of the rolling mill if required. If the temperature inherent in the metallic rolling stock drops too sharply before the hot rolling mill, or if a higher temperature is required on the hot rolling mill for hot rolling the material strip from the metallic rolling stock, it is advantageous if a heating device for additionally heating the metallic rolling stock is arranged between the casting device and the hot rolling mill, in particular the at least one hot rolling stand thereof. The heating device can be designed in different ways.Depending on the material strip to be produced, the heating device can comprise an electrically and / or gas-heated or hydrogen-heated roller table device, for example in the form of a tunnel furnace and / or an induction device. It should also be noted at this point that a further heating device can be arranged on the casting-rolling plant, for example in the hot rolling mill, namely between a roughing stand or a roughing mill train with a plurality of such roughing stands and a downstream finishing stand or a finishing mill train with a plurality of such finishing stands. For example, such a heating device can comprise a tempering and / or temperature-maintaining device.Page 17 / 34 P80958WO In order for the finished rolled material strip to be advantageously provided at the exit of the conveyor line, it is expedient if at least one cooling device, in particular a laminar cooling device and / or a spray cooling device and / or a pressure cooling device, is arranged further downstream of the hot rolling train, in particular of a last hot rolling stand thereof. If the at least one cooling device is arranged at a transition distance of less than or equal to 15 m from the last hot rolling stand, preferably less than or equal to 10 m and particularly preferably less than or equal to 7 m, the period between the last hot rolling process and the start of an actively carried out cooling, in particular an accelerated cooling, by means of a cooling medium of the at least one cooling device can be advantageously reduced.This, in turn, allows the desired material properties of the material strip to be adjusted even more precisely and reliably. Cooling devices for actively cooling a rolled stock using suitable cooling media on a conveyor line of a hot rolling mill, particularly downstream of a hot rolling train, are known from the prior art and can be easily used even with a material strip with a strip width of over 2,000 m. In particular, a cooling line length and width, as well as a cooling intensity, can be actively selected or adjusted depending on the desired quality of the material strip, its material alloy, its strip cross-section, or the like, particularly with the aid of laminar cooling.Page 18 / 34 P80958WO If a finished-rolled material strip does not concern a coilable hot strip but a material strip plate, it is advantageous if the at least one cooling device optionally comprises at least one cooling bed device. If the cooling bed device has a cooling bed length of greater than or equal to 20 m, preferably greater than or equal to 30 m and particularly preferably greater than or equal to 40 m, and / or a cooling bed length of less than or equal to 80 m, preferably less than or equal to 60 m and particularly preferably less than or equal to 50 m, even material plates of very different plate lengths can be thermally post-treated or specially cooled without any problems, namely with the aid of the appropriately dimensioned cooling bed device. Cooling bed devices of this type are well known in the art and can also be used in the context of the inventive hot rolling device.The present hot rolling apparatus can be constructed more compactly if the cooling bed device has a cooling bed length of less than or equal to 80 m, preferably less than or equal to 60 m, and particularly preferably less than or equal to 50 m. Advantageously, the material strip can be cooled with the cooling device optionally to a cooling outlet temperature of above 500 °C if it is to be additionally coiled as hot strip, or alternatively to a lower cooling outlet temperature of above 300 °C if it is to be provided as material strip plate (heavy plate). For example, a preferred coiling temperature for a finish-rolled material strip with a strip thickness of approximately 44 mm is at least approximately 500 °C.Page 19 / 34 P80958WO A finished-rolled material strip can advantageously be wound into a coil as hot strip at the conveyor line exit if at least one coiling device for coiling the hot-rolled material strip is arranged downstream of the hot rolling mill. Typical hot-strip coiler mandrels have a diameter of 762 mm, although larger diameters are possible, such as 850 mm. However, with a view to ensuring good further processing in subsequent processes, standard mandrel diameters are preferable to enable further processing of corresponding coils without further restrictions. For example, three such coiling devices are used here, so that finished-rolled hot strips can be coiled into several coils quickly.Furthermore, it is advantageous if the present casting-rolling plant has a production throughput of greater than or equal to 5.5 t / min, preferably greater than or equal to 6 t / min or greater than or equal to 8 t / min, and particularly preferably greater than or equal to 10 t / min, whereby an advantageous production output can be achieved with a single casting-rolling plant according to the invention. If the present casting-rolling plant has a production throughput of less than or equal to 15 t / min, preferably less than or equal to 12.5 t / min, and particularly preferably less than or equal to 10 t / min, the individual devices of the casting-rolling plant can be operated within easily manageable parameters.Page 20 / 34 P80958WO Furthermore, with regard to the finish-rolled material strip, additional finishing options can be created downstream of the hot rolling mill by arranging at least one additional cutting device downstream of the hot rolling mill. Furthermore, straightening operations can be performed on the conveyor line following the hot rolling mill if at least one straightening device, such as at least one roller straightening device, is arranged downstream of the hot rolling mill.Furthermore, the object is achieved by a method for primary forming a metallic rolling stock and for directly hot rolling a material strip from a metallic rolling stock conveyed along a conveyor line in the conveying direction, in which the metallic rolling stock is cast with a casting cross-section of greater than or equal to 0.16 m², preferably greater than or equal to 0.18 m², and particularly preferably greater than or equal to 0.2 m², and in which the cast metallic rolling stock is subsequently rolled using the casting heat in a casting-rolling plant. The method proposed here makes it possible for the first time to directly hot roll a metallic rolling stock with such a large casting cross-section following the casting process using the casting heat. In this respect, a wide variety of material strips with large final thicknesses and widths can be produced more energetically and thus more economically than was previously possible.This allows the production of particularly large-cross-section material strips to be carried out extremely energy-efficiently. Page 21 / 34 P80958WO It is particularly advantageous that the material strip is produced either as a windable hot-rolled strip or as a substantially flat heavy plate and is provided at the exit of the conveyor line; particularly advantageously on one and the same casting-rolling plant. The method claimed here can be used to advantageously operate, in particular, the casting-rolling plant described here. It is particularly advantageous if the method or a casting-rolling plant can be operated optionally in a batch mode, in a semi-endless mode, and / or in an endless mode. Preferably, material strips with large strip thicknesses can be produced in such a batch mode.In contrast, in semi-endless mode, for example, using suitable, known cutting devices, finished-rolled material strips can either be wound directly into a coil or, alternatively, fed into the cooling bed for passive cooling. In any case, the present process and the corresponding casting-rolling plant can be advantageously used in the production of material strips and products therefrom that have dimensions similar to heavy plate. This allows a significantly broader product range to be achieved with the present casting-rolling plant alone. Furthermore, a significantly broader product range can be advantageously achieved for a customer, since this product range can now be achieved with just a single plant and, moreover, with particularly high energy efficiency. This allows customers to tap into new market segments that could previously only be served with different plants.Page 22 / 34 P80958WO At this point, it should be noted that, within the scope of this patent application, indefinite articles and indefinite numerical expressions such as "one...", "two...", etc., are generally to be understood as at least statements, i.e., as "at least one...", "at least two...", etc., unless the context or the specific text of a particular passage indicates that only "exactly one...", "exactly two...", etc., are meant. It should also be mentioned here that, within the scope of this patent application, the expression "in particular" is always to be understood as introducing an optional, preferred feature. The expression is not to be understood as "and indeed" or "namely." Further advantages, details, and features of the invention will become apparent from the exemplary embodiments explained below.Components which at least essentially correspond in terms of their function in the individual figures can be identified by the same reference numerals, whereby the components do not have to be numbered and explained in all figures. The drawing shows: Figure 1: schematically a view of a first possible embodiment of a casting and rolling plant with a casting device having a casting cross-section of greater than or equal to 0.16 m2 and a hot rolling mill directly downstream thereof for directly rolling a material strip from a cast metallic rolled stock; and Page 23 / 34 P80958WO Figure 2: schematically a view of another possible embodiment of the casting and rolling plant from Figure 1. The casting and rolling plant 1 shown as an example in Figure 1 has a continuously operating casting device 2 for the continuous casting of a metallic rolled stock (not shown).This casting device 2 is capable of casting the metallic rolled stock with a casting cross-section greater than or equal to 0.16 m², whereby the casting cross-section results from the outlet opening at the exit of the casting device 2 and can also be easily measured on the cast metallic rolled stock in terms of its width and thickness (height). Preferably, the casting device 2 has a casting width greater than or equal to 2,000 mm and / or a casting thickness greater than or equal to 30 mm. The casting-rolling plant 1 further comprises a conveyor line 4 along which the metallic rolled stock is continuously moved or conveyed forward in the conveying direction 6 from the casting stage to the subsequent hot rolling stage.In this first possible embodiment, the casting and rolling plant 1 is further characterized by a separating device 8, a heating device 10 with a tunnel furnace (not additionally shown), a rolling mill 12 with at least one hot rolling stand (not shown), a cooling device 14 with an optional cooling bed device 16, and also a coiling device 18, which is located in the region of the exit 20 of the casting and rolling plant 1. The casting device 2, the separating device 8, the heating device 10, the rolling mill 12, the cooling device 14, the cooling bed device 16, and the coiling device 18 are all located on the common conveyor line 4, which is designed to be continuously linear from the casting device 2 to the exit 20.By means of the cutting device 8, located further downstream of the casting device 2, the metallic rolling stock can alternatively be cut upstream of the hot rolling mill 12, so that the casting and rolling plant 1 can be operated not only in a continuous or semi-continuous mode for the production of hot strip, but also in a batch mode, for example, to produce material plates in the manner of a heavy plate plant. By means of the heating device 10, located further downstream, thermal energy can optionally be introduced into the metallic rolling stock to be rolled, if required, before it is finish-rolled in the hot rolling mill 12. This advantageously expands the product range that can be achieved with the casting and rolling plant.The hot rolling mill 12, arranged downstream of the heating device 10, in this embodiment has both roughing stands and finishing stands, which are not shown in detail. In this respect, the hot rolling mill 12 implies a roughing mill 12A and a finishing mill 12B. The roughing mill stands of the roughing mill 12A can be additionally activated only as needed, in order to quickly reduce particularly large thicknesses of the metallic rolled stock, thereby advantageously further expanding the possible product range. For example, with inactive roughing mill stands, the metallic rolled stock can either simply be conveyed through these inactive roughing mill stands without rolling, or the inactive roughing mill stands can be moved out of the conveyor line 4 or a rolling line thereof.If the hot rolling mill 12 comprises both the roughing mill 12A and the finishing mill 12B, it is expedient to optionally arrange an additional heating device (not shown) between these two mills 12A and 12B. However, if the hot rolling mill 12 only has finishing mill stands, such an additional heating device can be dispensed with entirely. The cooling device 14, arranged further downstream of the hot rolling mill 12, can cool the finish-rolled material strip, either by passive cooling with the aid of a cooling bed device 16, or actively by means of additional cooling media for accelerated cooling prior to a coiling process with the coiling device 19.In the method for direct hot-casting of the material strip carried out with the casting-rolling plant 1, process parameters relating to the casting device 2, the heating device 10, the hot-rolling train 12, the cooling device 14, in particular the cooling bed device 16 thereof, and possibly the coiling device 18 are used. Relevant process parameters include, among other things, temperature data at the outlet of the casting device 2, at the inlet of the heating device 10, at the inlet of the hot-rolling train 12, speed data relating to the casting device 2 and the rolling stands, the coiling device 18, as well as data on cooling rates relating to the cooling device 14, or the like. Page 26 / 34 P80958WO Depending on the product dimensions and material, the process parameters must be adjusted so that high-quality products can be rolled and discharged from the casting-rolling plant 1.For example, the casting and rolling plant 1 can cover an exceptional hot strip thickness range from 2.0 mm to 32.0 mm, almost any strip width even greater than or equal to 2,000 mm. According to the illustration in Figure 2, a further possible embodiment of an alternative casting and rolling plant 100 is shown, which has essentially the same structure as the casting and rolling plant 1 from Figure 1. Therefore, with regard to this further possible embodiment, only essential differences are explained below, and otherwise reference is made to the explanations of the casting and rolling plant 1 from Figure 1 to avoid repetition. The alternative casting-rolling plant 100 additionally has a feed-in system 30 for creating a feed-in facility for feeding slabs (not shown here) from a slab storage area 30A into the conveyor line 4 or directly into the heating device 10, in particular medium or thick slabs.The run-in system 30 has a run-in mechanism 30B, which can, for example, comprise a "slab ferry," by means of which a slab can be moved from the slab storage area 30A into the heating device 10. The run-in system 30 also makes it possible to operate the present casting-rolling plant 100 in a batch mode in addition to a continuous, compact, endless mode. Page 27 / 34 P80958WO In this respect, the run-in system 30 can advantageously expand the product portfolio that can be produced with a single casting-rolling plant 100.

[0002] Page 28 / 34 P80958WO List of Reference Symbols1 Casting and Rolling Plant2 Casting Device4 Conveyor Line6 Conveyor Direction8 Separating Device10 Heating Device12 Rolling Mill12A Roughing Mill12B Finishing Mill14 Additional Heating Device16 Cooling Device18 Coiling Device20 Exit30 Entry System30A Slab Storage 30B Fähre 100 alternative casting and rolling plants

Claims

Page 29 / 34 P80958WO Patent claims 1. Gieß-Walz-Anlage (1; 100) zum Urformen eines metallischen rolling stock and hot rolling of a material strip conveyed along a conveying path (4) in the conveying direction (6), comprising: ^ Gießvorrichtung (2) zum kontinuierlichen Gießen des metal- metallic rolled stock, ^ eine Warmwalzstraße (12) zum Warmwalzen des Materialbands (2) from the metallic rolled stock with at least one hot- alzgerüst, wobei ^ die Gießvorrichtung (2) eine Gießbreite von größer oder gleich 2.000 mm aufweist, bevorzugt von größer oder gleich 2.200 mm und besonders bevorzugt von größer oder gleich 2.400 mm.

2. Gieß-Walz-Anlage (1; 100) nach Anspruch 1, dadurch gekenn- zeichnet, dass die Gießvorrichtung (2) eine Gießbreite von klei- ner oder gleich 3.500 mm aufweist, bevorzugt von kleiner oder gleich 3.000 mm und besonders bevorzugt von kleiner oder gleich 2.800 mm.

3. Gieß-Walz-Anlage (1; 100) nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Gießvorrichtung (2) eine Gießdicke von größer oder gleich 90 mm aufweist, bevorzugt von größer oder gleich 100 mm oder von größer oder gleich 120 mm und besonders bevorzugt von größer oder gleich 140 mm.

4. Gieß-Walz-Anlage (1; 100) nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Gießvorrichtung (2) eine Gieß- dicke von kleiner oder gleich 200 mm aufweist, bevorzugt von kleiner oder gleich 180 mm und besonders bevorzugt von kleiner oder gleich 160 mm. Page 30 / 34 P80958WO 5. Gieß-Walz-Anlage (1; 100) nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Gießvorrichtung dazu eingerich- tet ist, einen Gießquerschnitt von größer oder gleich 0,16 m2 zu gießen, vorzugsweise von größer oder gleich 0,18 m2 und besonders bevorzugt von größer oder gleich 0,2 m2.

6. Gieß-Walz-Anlage (1; 100) nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die Gießvorrichtung (2) dazu ein- directed, a casting cross-section of less than or equal to 0,9 m2 zu gießen, vorzugsweise von kleiner oder gleich 0,8 m2 und besonders bevorzugt von kleiner oder gleich 0,7 m2.

7. Gieß-Walz-Anlage (1; 100) nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass die Warmwalzstraße (12), insbeson- dere das wenigstens eine Warmwalzgerüst hiervon, eine Warmwalz- breite von größer oder gleich 2.000 mm aufweist, vorzugsweise von größer oder gleich 2.200 mm und besonders bevorzugt von grö- ßer oder gleich 2.400 mm, und / oder eine Warmwalzbreite von klei- ner oder gleich 3.500 mm aufweist, vorzugsweise von kleiner oder gleich 3.000 mm und besonders bevorzugt von kleiner oder gleich 2.800 mm.

8. Gieß-Walz-Anlage (1; 100) nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass die Gießvorrichtung (2) dazu ein- gerichtet ist, eine Gießgeschwindigkeit von größer oder gleich 1 m / min aufzuweisen, vorzugsweise von größer oder gleich 1,2 m / min und besonders bevorzugt von größer oder gleich 1,4 m / min, und / oder eine Gießgeschwindigkeit von kleiner oder gleich 6 m / min aufzuweisen, vorzugsweise von kleiner oder gleich 5,5 m / min und besonders bevorzugt von kleiner oder gleich 5 m / min.

9. Gieß-Walz-Anlage (1; 100) nach einem der Ansprüche 1 bis 8,dadurch gekennzeichnet, dass die Warmwalzstraße (12) dazu ein- directed, with respect to the at least one hot rolling stand eine Auslaufgeschwindigkeit von größer oder gleich 10 m / min auf- Page 31 / 34 P80958WO zuweisen, vorzugsweise von größer oder gleich 40 m / min und be- sonders bevorzugt von größer oder gleich 60 m / min, und / oder eine Auslaufgeschwindigkeit von kleiner oder gleich 900 m / min aufzu- weisen, vorzugsweise von kleiner oder gleich 750 m / min und be- sonders bevorzugt von kleiner oder gleich 600 m / min.

10. Gieß-Walz-Anlage (1; 100) nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass die Warmwalzstraße (12) hinsicht- lich des wenigstens einen Warmwalzgerüsts einen Walzspalt mit einer Höhe von kleiner oder gleich 200 mm aufweist, vorzugsweise von kleiner oder gleich 180 mm und besonders bevorzugt von klei- ner oder gleich 160 mm, und / oder mit einer Höhe von größer oder gleich 90 mm aufweist, vorzugsweise von größer oder gleich 100 mm und besonders bevorzugt von größer oder gleich 120 mm.

11. Gieß-Walz-Anlage (1; 100) nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, dass die Warmwalzstraße (12) zum Hot rolling of the material strip to a run-out thickness of greater than oder gleich 1,6 mm eingerichtet ist, vorzugsweise von größer oder gleich 2 mm und besonders bevorzugt von größer oder gleich 3,2 mm, und / oder kleiner oder gleich 60 mm eingerichtet ist, vorzugsweise von kleiner oder gleich 55 mm und besonders bevor- zugt von kleiner oder gleich 50 mm.

12. Gieß-Walz-Anlage (1; 100) nach einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, dass die Warmwalzstraße (12) aus a roughing mill train (12A) comprising at least one roughing stand and a finishing mill train (12B) comprising at least one finishing stand, in particular the roughing mill train (12A) hinsichtlich des wenigstens einen Vorwalzgerüsts einen Walzspalt mit einer Höhe von kleiner oder gleich 180 mm auf, vorzugsweise von kleiner oder gleich 160 mm und besonders be- vorzugt von kleiner oder gleich 150 mm, und / oder mit einer Höhe von größer oder gleich 80 mm auf, vorzugsweise von größer oder gleich 100 mm und besonders bevorzugt von größer oder gleich 120 mm. Page 32 / 34 P80958WO 13. Gieß-Walz-Anlage (1; 100) nach einem der Ansprüche 1 bis 12, dadurch gekennzeichnet, dass die Gieß-Walz-Anlage eine Separating device (8) for separating the metallic rolling stock, wherein the separating device is arranged between the casting device (2) and the hot rolling train (12), wherein theGießvorrichtung (2) und die Warmwalzstraße (12), insbesondere the at least one hot rolling stand thereof, inline of the conveyor line (4) a distance of less than or equal to 150 m aufweisen, vorzugsweise von kleiner oder gleich 120 m und besonders bevorzugt von kleiner oder gleich 90 m, und / oder einen Abstand von größer oder gleich 20 m aufweisen, vorzugsweise von größer oder gleich 30 m und besonders bevorzugt von größer oder gleich 70 m.

14. Gieß-Walz-Anlage (1; 100) nach einem der Ansprüche 1 bis 12, dadurch gekennzeichnet, dass die Gießvorrichtung (2) und die Hot rolling mill (12), in particular the at least one hot rolling stand thereof, inline of the conveyor line (4) to each other a Abstand von kleiner oder gleich 70 m aufweisen, vorzugsweise von kleiner oder gleich 60 m und besonders bevorzugt von kleiner oder gleich 50 m, und / oder einen Abstand von größer oder gleich 10 m aufweisen, vorzugsweise von größer oder gleich 25 m und besonders bevorzugt von größer oder gleich 30 m.

15. Gieß-Walz-Anlage (1) nach einem der Ansprüche 1 bis 14, dadurch gekennzeichnet, dass zwischen der Gießvorrichtung (2) und der Warmwalzstraße (12), insbesondere des wenigstens einen Warmwalzgerüsts hiervon, eine Erwärmungsvorrichtung (10) zum zu- sätzlichen Erwärmen des metallischen Walzgutes angeordnet ist.

16. Gieß-Walz-Anlage (1) nach einem der Ansprüche 1 bis 15, dadurch gekennzeichnet, dass weiter stromab der Warmwalzstraße (12), insbesondere eines letzten Warmwalzgerüsts hiervon, we- at least one cooling device (16) is arranged, in particular eine Laminarkühlvorrichtung und / oder eine Sprühkühlvorrichtung und / oder eine Druckkühlvorrichtung. Page 33 / 34 P80958WO 17. Gieß-Walz-Anlage (1) nach Anspruch 16, dadurch gekennzeich- net, dass die wenigstens eine Kühlvorrichtung (16) wenigstens includes a cooling bed device.

18. Gieß-Walz-Anlage (1) nach einem der Ansprüche 1 bis 17, dadurch gekennzeichnet, dass der stromab der Warmwalzstraße (12) at least one coiling device (18) is arranged for coiling the hot-rolled material strip.

19. Gieß-Walz-Anlage (1) nach einem der Ansprüche 1 bis 18, dadurch gekennzeichnet, dass die vorliegende Gieß-Walz-Anlage (1) einen Produktionsdurchsatz von größer oder gleich 5,5 t / min aufweist, vorzugsweise von größer oder gleich 6 t / min und be- sonders bevorzugt von größer oder gleich 8 t / min, und / oder einen Produktionsdurchsatz von kleiner oder gleich 15 t / min aufweist, vorzugsweise von kleiner oder gleich 12,5 t / min und besonders bevorzugt von kleiner oder gleich 10 t / min.

20. Verfahren zum Urformen eines metallischen Walzgutes und zumdirect hot rolling of a along a conveyor line (4) in Förderrichtung (6) geförderten Materialbands aus dem metalli- rolling stock, in particular for operating a casting-rolling plant (1) according to one of the preceding claims, in which the metallische Walzgut mit einem Gießquerschnitt von größer oder gleich 0,16 m2 gegossen wird, vorzugsweise von größer oder gleich 0,18 m2 und besonders bevorzugt von größer oder gleich 0,2 m2 und anschließend unter Verwendung der Gießhitze von einer Walzstraße is rolled.

21. Verfahren nach Anspruch 20, dadurch gekennzeichnet, dass das Verfahren bzw. eine Gieß—Walz-Anlage (1) wahlweise in einem Batch mode, semi-endless mode and / or endless mode.

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