• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    In order to produce composite steel and / or hot strip energy efficient, continuous and in large quantities, a method is proposed according to the invention, wherein a continuous casting several casting devices, preferably comprising molds (3a, 3b, 3c), and each casting a downstream strand guide (4a, 4b , 4c), wherein strands (5a, 5b, 5c) are produced by means of the casting devices, which are drawn off via the respective strand guide (4a, 4b, 4c) and rolled in a hot strip mill, wherein at least two strands (5a, 5b, 5c) after the strand guides (4a, 4b, 4c) are arranged one above the other in the hot state.
    公开号:AT519697A1
    申请号:T50168/2017
    申请日:2017-03-03
    公开日:2018-09-15
    发明作者:Klaus Weinzierl Dr
    申请人:Primetals Technologies Germany Gmbh；
    IPC主号:
    专利说明:

    description
    Process for the continuous production of steel strip
    Technical field
    The invention relates to a method for the continuous production of steel strip,
    a continuous casting installation having a plurality of casting devices, preferably comprising molds, and each casting device having a downstream strand guide,
    - whereby strands are created by means of the casting devices, which are drawn off via the respective strand guide and rolled in a hot strip mill.
    In the continuous production of steel strip, strands are fed from the continuous casting plant directly into the hot strip mill when hot and rolled there. This also includes the semi-continuous production of steel strip, where the strand is cut before the hot strip mill and the resulting slabs are rolled while hot.
    If casting devices with molds are used, each mold has a downstream strand guide, and liquid metal is poured into the molds, resulting in strands which are drawn off via the respective strand guide.
    State of the art
    In composite materials, composite components, such as steel goods of different compositions, are combined to form a composite material. Is intended
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    201600318 to be able to provide a composite material that combines the desired properties of the individual composite components in one composite material.
    In the case of CSP systems (Compact Strip Production), the strip is produced in a continuous process. This means that the casting process and the rolling process take place immediately one after the other out of quasi heat. WO 2007/073841 A1 discloses a CSP system in which both an induction furnace and a holding furnace are provided between the casting machine and the rolling mill in order to keep the thin slab at temperature or to raise the temperature somewhat, both the holding furnace and the induction furnace is also activated, deactivated or controlled or regulated depending on the operating mode. A method is known from the publication WO 01/68293 A1, in which core and edge layers are bonded together in a casting process to form the composite material by surface melting.
    Hot strip can be produced with a wide variety of plant types. The material properties of the steel strip produced not only depend on the alloying elements, but also to a considerable extent on the process parameters during its manufacture. Steel can also be manufactured and rolled in a layered structure. For example, when making a samurai sword, the steel is folded several times and forged again with a hammer. This makes it possible to manufacture particularly high-quality steels. This potential is rarely used in a hot strip mill to date and, in addition, a lot of energy is used in the production of hot strip. The energy costs are therefore for the
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    Cost-effectiveness of production is crucial
    Cost factor.
    In the so-called endless strip production (ESP), a slab is cast in a casting machine that is approx. 70-100 mm thick. Directly after the casting machine there are scaffolds (HRM = High Reduction Mill), in which a large decrease in the strip thickness to approx. 12-25 mm is achieved.
    The material then passes through an inductive heater and a multi-stand finishing train, in which the thickness can be reduced to 0.8 mm. The strip is then cooled in the cooling section to adjust the material properties and after this there is a reel on which the strip is wound into coils, which completes the production process in the ESP system.
    One problem with ESP systems is that the strand cannot be cast at the speed at which one
    Finishing train can roll out a pre-strip to a finished strip. Common mass flows during casting are 6-8mm * m / s, while rolling 20-50mm * m / s. Because of the low
    Strand speed, the heat losses in the strand during rolling are very high. An induction furnace is also required in front of the finishing train to prevent the temperature in the finishing train from falling too low. The consumption of high-quality electrical energy for heating worsens the overall energy balance of the ESP system.
    The low rolling speed also has a negative effect on the material properties and surface, as there is a lot of time for recrystallization and scaling between the individual removal steps.
    Object of the invention
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    It is therefore an object of the present invention to overcome the disadvantages of the prior art and to propose a method by means of which steel strip can be produced continuously, in an energy-efficient manner and in large quantities using continuous casting.
    Presentation of the invention
    This object is achieved according to the invention by a method for the continuous production of steel strip
    a continuous casting installation having a plurality of casting devices, preferably comprising molds, and each casting device having a downstream strand guide,
    - whereby by means of the casting devices strands are formed, which are drawn off over the respective strand guide and rolled in a hot strip mill, at least two strands being arranged one above the other in the hot state after the strand guides.
    After the production of hot strip requires a lot of energy, it has proven to be extremely advantageous to use multiple molds and to arrange hot strands, especially immediately, after the individual strand runs (but at least before the first rolling process), so that the strands run through the radiate heat each other. The strands are preferably aligned parallel to one another. “Strands also include so-called pre-strips, which can have a thickness of 60100 mm and a width of 0.5-3m. The effect according to the invention therefore occurs particularly strongly when the strands have a large width in relation to the thickness
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    Have 201600318. This is because the heat radiated across the width is largely absorbed by a strand located above or below, while the heat radiation emptying through the narrow side walls of the strand at the edge, i.e. to the left and right as seen in the direction of strand guidance, is not so much weight. Solidified strands, strand pieces and slabs are generally rod-shaped or plate-shaped, in any case flat, and are therefore generally arranged one above the other in a flat form.
    The pouring devices, in particular the molds, are arranged, for example, in a vertical plane and the strands are drawn congruently (to one another) from the respective molds via strand guides arranged downstream of the molds and arranged one above the other on a common strand guide into which the downstream strand guides open. If the pouring devices are staggered, in particular molds (not in a vertical plane but laterally offset, for example), the respective downstream strand guides are placed on the common one
    Strand guide merged. Overlaying the strands is more difficult, but possible with simultaneous, spaced lateral merging with increasing width of the strands.
    The junction point of the strand guides of the respective molds on the common strand guide or the point at which the strand guide of a casting device, in particular the mold, which is closest to a finishing train, opens into the common strand guide, is also referred to as the muzzle point.
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    In a first preferred embodiment of the method according to the invention, at least two strands are superimposed in a hot state, that is to say directly after the individual strand guides on a downstream common strand guide, so that they touch one another. By superimposing the hot strands directly on or after the muzzle point, the strands induce mutual heat. This means they stay hot longer with less radiation of heat to the environment and without entering into a material bond, making an oven in front of the rolling mill or the finishing train obsolete. Considerable costs are saved due to the lapse of a furnace along the strand guide.
    The use of multiple molds significantly increases the productivity of the system, since larger quantities of the molten metal are cast into strands at the same time and processed in the subsequent rolling mill.
    Particularly preferably, at least two endless strands touching one another are connected to one another by rolling in a first roll stand of the hot strip mill to form a strip. So that no furnace has to be used to heat the metal strands in front of the first roll stand, the roll stand is arranged immediately after the muzzle point in order to connect the metal strands which are in contact and / or one above the other. It is known from forging that two layers of a large number of types of steel bond to one another if they are placed on top of one another and forged at a temperature of 1200 ° C or higher. Accordingly, the strands are connected by rolling to form a uniform, thick strand or band. By welding different strands in the rolling mill
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    In 201600318, composite steel is produced that has a number of outstanding material properties.
    The entry thickness of the strand in the first roll stand is determined by the sum of the strand thicknesses of the individual strands; the exit thickness is lower according to the decrease (for example by 40%). The mass flow of the emerging strip is the sum of the mass flows of all incoming strands. However, it cannot be immediately concluded that the mass flows of the incoming strands are the same for the same strand thicknesses. Depending on the material hardness (and temperature) of the incoming strands, there may be differences. A retroactive effect on the
    Casting level control is the inevitable consequence, and the casting speed of each strand has to be adapted to the mass flow of the respective strand resulting from the merging. There is a master casting speed that can be set independently, but all other speeds are then linked to this master speed via the mold level control in accordance with the partial mass flows that occur when merging. Since the forming depends on the strand temperatures, indirect control of the casting speed of a strand can also be achieved by controlling the strand temperatures.
    Preferably, in a second embodiment variant of the method according to the invention, at least two strands are cut by at least one cutting device and stored in an oven in superimposed receptacles for strands. In this embodiment variant, there is a furnace which is located in front of the rolling mill, ie in front of the hot strip mill. After cutting, the strands or strand pieces (slabs) are stacked
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    201600318 supplied lying recordings of the furnace and stored there. The strands or strand pieces (slabs) generally do not touch each other. This storage of the hot strands or strand pieces (slabs) also saves energy in this variant, since the strand pieces (slabs) illuminate one another. The strands do not have to be arranged one above the other before or during cutting, although this would have a positive effect on the energy balance.
    According to a preferred embodiment variant of the method according to the invention, at least two strands are cut, placed one on top of the other and fed to the furnace in a state one on top of the other. This variant is recommended if two or more strands are placed one on top of the other, i.e. touching each other, and are therefore to be fed together to the roll stand. For this purpose, the strand guide serves as a transport device and guides the superimposed strands e.g. towards the bottom of the stove. Accordingly, this receptacle must be designed in such a way that there is space for at least two superimposed strands.
    In a preferred embodiment variant of the method according to the invention, the distance between the strands in the furnace is a maximum of two strand thicknesses, in particular a maximum of one
    Strand thickness. The distance for pre-strips is between 120-200 mm, in particular between 60 and 100 mm.
    The heating energy of the furnace can be greatly reduced due to the particularly narrow storage. It is also conceivable that heating of the furnace can also be dispensed with entirely if the intrinsic radiation of the strand pieces (slabs) is reflected accordingly.
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    Strands are preferably selectively fed and / or removed from the receptacles of the furnace by means of at least one transport device, in particular a gripping device. In this way, strands can be stored in selected images and removed in a targeted manner. The transport device can move the cut strand pieces (slabs) in the vertical direction (ie raise or lower) and / or move them in the horizontal direction, that is to say shift them approximately normal to the direction of transport of the strand.
    In a further preferred embodiment variant of the variant with furnace, the strands are fed individually to the first rolling stand of the hot strip mill. The advantage of this procedure is that a high utilization of the rolling mill is guaranteed, since there is always one strand piece (slab) available for rolling. For example, the strands of the other molds can also be rolled during the maintenance of a mold.
    It is also conceivable in the variant with the furnace that the strands are fed together, namely one above the other, to the first rolling stand of the hot strip mill. As a result, composite steel is also produced in a simple and efficient manner in this case. Depending on the selection of the compositions of the individual strands, composite steel can be produced that combines the desired properties of the individual composite components in one composite material.
    If necessary, at least one strand can be used
    Cooling devices are cooled in front of the first mill stand of the hot strip mill. The desired properties of the respective alloys can be set by setting the temperature
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    201600318 or control the compositions of the respective strands.
    In a device for the continuous production of steel strip, in particular for carrying out the method according to the invention, a continuous casting installation has at least two casting devices, in particular comprising molds, and each casting device has a downstream strand guide, the casting devices being arranged at a distance from one another and / or one above the other and / or next to one another and the respective strand guides of the casting devices open into a common strand guide in which the strands can be arranged one above the other. In contrast to the prior art, the strands are directly after or on the
    Mouth point arranged on top of one another on a common strand guide for mutual heating.
    In a further preferred embodiment of the device according to the invention it is provided that the distance between the pouring devices, in particular the molds, from one another is less than or equal to 2 m, preferably less than or equal to 1 m around the contact, preferably congruent superimposition of the respective hot strands on the common one
    To allow strand guidance. This type of arrangement of multiple molds saves space on the one hand and on the other hand enables different strands of different molds to touch or lie one above the other as quickly as possible so that thermal losses are kept as low as possible.
    In a further preferred embodiment variant of the device according to the invention, a first rolling stand of the hot strip mill is immediately after an outlet point
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    Strand guides arranged in the common strand guide. The direct connection of at least two hot strands means that one oven (and one
    Cutting device) before the hot strip mill in this
    Design variant superfluous. The layered material which is connected to one another after the first roll stand is fed to further roll stands and rolled to a preferred thickness and width. The mass flow is a multiple of the value otherwise achieved with an ESP system, for example 20mm * m / s with three superimposed
    Strands or 35mm * m / s (up to 40mm * m / s) with five superimposed strands. This value is in the range of a normal HSM (Hot Strip Mill) of the usual order of magnitude.
    According to the alternative embodiment variant of the device according to the invention, at least one cutting device is arranged after the strand guides, in particular before the point of confluence with the common strand guide, and an oven arranged after the at least one cutting device and after the common strand guide has at least two, preferably three to five, one above the other Recordings for strands on. This has the advantage that strands of the same type of metal and strands of different types of metal can be cut off at a desired length, particularly during continuous casting, and can be temporarily stored in an energy-saving manner. The strand guides here again mean those strand guides which are arranged downstream of the casting devices or molds and which ensure the formation of a strand which is no longer liquid on the inside. This can be followed by further strand guides, which guide the strands into the common strand guide. This common strand guide could be designed as a feed to the furnace, which ensures that the strands or
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    Strands (slabs) then come to lie one above the other in the furnace. As a rule, a separate cutting device is provided for each strand.
    In the embodiment variant with a cutting device, the casting devices, that is to say the molds, can be arranged next to one another and only the strands, more precisely the strand pieces or slabs, are arranged one above the other.
    In the respective recordings of the furnace, e.g.
    different metal strands stored hot and selectively removed for further processing. If different alloys are used for the strand pieces in the individual receptacles, preferably shafts, for example softer material for shafts 2, 3 and 4 and harder material for shafts 1 and 5, steel can be produced which is both high-strength and flexible. You can, for example, also introduce corrosion-resistant, higher-alloy steel in the receptacles 1 and 5, cheap low-alloy steel in the receptacles 2 and 4 and in this way you get cheaper, but still corrosion-resistant composite steel if the strands are then rolled one on top of the other. The production of such composite steels is of course also possible in the embodiment variant with the endless strands described above.
    In an alternative embodiment variant of the device according to the invention there is at least one
    Transport device, in particular a gripping device, arranged before and / or after the furnace, as a result of which strands can be selectively fed to and removed from the furnace receptacles. There can be more than one transport device before the oven and more than one transport device after the oven
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    201600318. A crane is particularly suitable as a gripping device. It is also conceivable for others
    To use transport devices to feed individual strands to the recordings of the furnace. For example, strand guides, roller conveyors or conveyor belts could be used here.
    In one embodiment variant, the distance between the receptacles in the furnace is a maximum of two strand thicknesses, preferably a maximum of one strand thickness.
    It can further be provided that cooling devices are arranged in front of the first rolling stand of the hot strip mill. The cooling devices may be used to set specific material properties.
    According to a further preferred embodiment variant of the device according to the invention, a common pan is provided for the molds and has a plurality of pouring tubes arranged one behind the other. Due to this design of the pan, several molds are loaded in a simple manner from just one pan. The regulation of the casting speed can be selectively adjusted by means of closure devices, such as plugs or valves, or by other devices.
    It would be possible for the pan to have at least one, preferably at least two, chambers. By using one chamber, only strands of the same material can be produced with this pan. When using two or more chambers within the pan, different metals or alloys can be poured into the same pan in the respective chambers without clogging
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    Mix 201600318. More than two chambers in one pan are conceivable. This has the advantage that when using separate pouring tubes for the respective chambers, different metal strands of different metal types or different alloys are applied to the common strand guide simultaneously or in succession from a pan via spaced-apart molds.
    In a further preferred embodiment variant, at least two pans are provided for the molds. Identical metal melts are filled into the respective pans or metal melts with different stoichiometric compositions or even different metals are used. A superimposition of the metal strands along the strand guide is of course again possible, as in the previously mentioned embodiment variant.
    The production costs per ton of steel produced are significantly lower in the process according to the invention than in the case of previously known plant types.
    Brief description of the figures
    The invention will now be explained in more detail on the basis of exemplary embodiments. The drawings are exemplary and are intended to illustrate the inventive concept, but in no way to narrow it down or even reproduce it conclusively.
    It shows:
    Fig. 1 is a schematic view of a method according to the invention for the continuous production of
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    Steel belt with strands on top of each other without an oven,
    2 shows a schematic view of a method according to the invention for the continuous production of steel strip with an oven and semi-continuous production,
    3 shows a schematic view of a method according to the invention for the continuous production of steel strip with an oven and superimposed strands,
    4 shows a detailed view of FIG. 2 in side view, for molds arranged one behind the other,
    5 is a perspective view of an oven with two receptacles,
    6 is a front view of an oven with three receptacles,
    FIG. 7 shows a detailed illustration as a variant of FIG. 2 in
    Top view, for molds arranged side by side.
    Implementation of the invention
    Fig. 1 relates to the first embodiment of the invention. 1 shows a schematic view of a method according to the invention for the continuous production of steel strip with a ladle 1, which has two pouring tubes 11a, 11b, which pouring tubes 11a, 11b are each connected to a mold 3a, 3b. The respective downstream of the molds 3a, 3b
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    Strand guide 4a, 4b ends at an opening point M on a common strand guide 8. The common strand guide 8 can e.g. be designed as a roller conveyor. The molds 3a, 3b and the strand guides 4a, 4b lie here in a common vertical plane, the plane of the drawing.
    Liquid metal 2 is poured from the pan 1 into the respective molds 3a, 3b via two separate pouring tubes 11a, 11b and strands are drawn off via the respective strand guide 4a, 4b arranged downstream of the molds 3a, 3b and arranged one above the other at the mouth point M, namely congruently on top of each other, here on top of each other. Directly after the outlet point M there is a first rolling stand 6 of a hot strip mill, which connects the hot individual strands 5a, 5b, which are arranged one above the other and are simultaneously located in the common strand guide 8, to form a common strip 7. Of course, the first roll stand 6 can be followed by one or more roll stands 15 of a roughing train and a finishing train 12. The finishing line 12 is followed, as usual, by cutting and reeling devices, which are not shown here.
    Fig. 2 and the following figures relate to the second
    Embodiment variant of the invention, where the strands 5a, 5b, 5c are cut. 2 shows a schematic view of a method according to the invention for the semi-continuous production of steel strip, the corresponding device comprises three molds 3a, 3b, 3c, three strand guides 4a, 4b, 4c arranged downstream of the molds, each with three individual hot strands 5a, 5b, 5c, an outlet point M, a symbolically illustrated cutting device 9, which represents three cutting devices 9a, 9b, 9c (see FIGS. 4 and 7), a common strand guide 8, an oven 10, and one
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    201600318 first roll stand 6 of a hot strip mill, which of course can again be followed by a plurality of roll stands 15, followed by a finishing train 12. The molds 3a, 3b, 3c and the strand guides 4a, 4b, 4c can here, in addition or as an alternative to the height offset, also laterally, so be normal to the plane of the drawing.
    4, the molds 3a, 3b, 3c, viewed in the strand guide direction, are arranged one above the other, the molds 3a, 3b, 3c and the strand guides 4a, 4b, 4c lie here in a common vertical plane, the plane of the drawing. The strand guides 4a, 4b, 4c are then designed such that they guide the strands 5a, 5b, 5c straight ahead into the common strand guide 8, where the strands 5a, 5b, 5c are arranged one above the other and at a short distance from one another. The hot strands 5a, 5b, 5c are cut individually by means of cutting devices 9a, 9b, 9c, one of which is arranged per strand guide 4a, 4b, 4c, before the mouth point M.
    In Fig. 4 it can be seen that the top strand 5a has already been cut some time ago and a strand piece (slab) is already in the furnace in the top of the top receptacle (shown in dashed lines) while the strand 5a is already over the cutting device 9a moved out. The middle strand 5b has just been cut, a strand piece is just being inserted into the furnace 10, in the middle receptacle, so that the strand pieces of the top strand 5a, the bottom strand 5c and the middle strand 5b - seen in the vertical direction - are congruent with one another lie and can warm each other. The bottom strand 5c was also cut some time ago and a strand piece (slab) is already in the bottom of the furnace in the bottom receptacle (dashed lines)
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    201600318), while the strand 5c is already moving beyond the cutting device 9c. The strand pieces of the strands 5a, 5b, 5c can be arranged congruently one above the other after the respective cutting device 9a, 9b, 9c and are therefore located in a common strand guide 8 between the cutting device 9a, 9b, 9c and the furnace 10. Since the strand pieces of the strands 5a, 5b, 5c can also be arranged one above the other in the furnace 10, and in the case shown this is the case for the uppermost 5a and the lowermost strand 5c, the common strand guide 8 extends into the furnace 10. By means of a transport device, such as a gripping device 13, such as a crane, the individual strand pieces from the furnace 10 can be raised to the roller level of the roll stand 6 (strand pieces of strand 5c) or lowered (strand pieces of strand 5a), while strand pieces of strand 5b can be transported on the same level from the furnace 10, for example by means of a roller conveyor.
    FIG. 6 shows a front view of an oven 10 as shown in FIG.
    can be used with three receptacles 14 in which there are just three pieces of strands 5a, 5b, 5c one above the other. The line of sight here is the transport direction of the strands 5a, 5b, 5c. Of course, the furnace 10 can also have more than three, for example five receptacles 14 and accordingly accommodate five strands. Due to the proximity of the receptacles 14 and, accordingly, the strands 5a, 5b, 5c to one another, heat losses of the strands 5a, 5b, 5c are greatly reduced, since these heat each other.
    Of course, the method according to FIG. 4 can also be carried out with only two strands, or with four or five strands. Fig. 5 shows e.g. a perspective view of an oven 10
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    201600318 with two receptacles 14, a piece of a strand 5a, 5b being accommodated in one receptacle 14 here.
    7 is a variant of FIGS. 2 and 4 and is shown in a top view. The molds 3a, 3b, 3c and the strand guides 4a, 4b, 4c can only be offset laterally, that is normally to the plane of the drawing in FIG. 2, or in addition to the height offset. The strand guides 4a, 4c are then designed such that they guide the strands 5a, 5c laterally onto the common strand guide 8, which forms a continuation of the strand guide 5b in the transport direction of the strand 5b.
    In the common strand guide 8, the strands 5a, 5b, 5c, more precisely their cut strand pieces, are again arranged one above the other and at a short distance from one another. The hot strands 5a, 5b, 5c are namely individually cut in front of the mouth point M for high utilization of the roll stands in semi-continuous operation by means of cutting devices 9a, 9b, 9c, which are arranged on the respective strand guides 4a, 4b, 4c. The common strand guide 8 and the furnace 10 can then again be designed as in FIG. 4.
    If the common strand guide 8 in front of the furnace 10 is not designed as in FIG. 4, but the strand pieces only reach the furnace 10 in one plane, for example in a straight horizontal extension of the strand guide 5b, the individual strand pieces can be gripped by means of a gripping device 13, such as one Crane, in the furnace 10 in the respective receptacles 14 (see FIGS. 5 and 6) are raised or lowered, while strand pieces of strand 5b can be transported into the furnace 10 on the same level, for example by means of a roller conveyor.
    In the furnace 10, the strand pieces are stored one above the other in receptacles 14, preferably shafts, and are the
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    Furnace 10 individually removed by means of a further gripping device 13, raised or lowered if necessary, and rolled one after the other. Downstream of the roll stand 6, further roll stands of a roughing mill (not shown here) can be arranged, after which there is a finishing train 12. The subsequent cutting and
    Coiler devices are not shown.
    3 shows a schematic view of a method according to the invention for the continuous production of steel strip, the corresponding device comprises two molds 3a, 3b, strand guides 4a, 4b downstream of the molds, two hot individual strands 5a, 5b, the outlet point M, a common strand guide 8 , a cutting device 9, a furnace 10 with two strands already lying almost completely one above the other, i.e. in contact with one another, a first roll stand 6, a roll stand 15 of a hot strip mill arranged downstream of the first roll stand 6, in which a strand or strip is located , and the finishing train 12. The molds 3a, 3b and the strand guides 4a, 4b are here again, as in FIG. 1, in a common vertical plane, the plane of the drawing.
    The strands 5a, 5b are drawn off via the respective strand guide 4a, 4b arranged downstream of the molds 3a, 3b and arranged one above the other at the mouth point M, namely congruently with a vertical distance from one another in the common strand guide 8. After the mouth point M there is a cutting device 9, with which the strands 5a, 5b are cut together. However, the strands 5a, 5b can also be cut in front of the mouth point M, preferably a separate cutting device 9a, 9b is then provided for each strand 5a, 5b (analogous to FIG. 4).
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    The strand pieces thus created are conveyed into the furnace 10 by means of a common strand guide 8 and / or gripping device 13 and are stored one above the other there. If two strands 5a, 5b already lying on top of one another are cut together, they can be fed to the furnace 10 lying on top of one another. From there, they can be selectively removed individually by means of gripping device 13 and then processed in succession in a first rolling stand 6 and the subsequent rolling stands 15 of the hot strip mill, including the finishing train 12.
    However, several strand pieces could also be removed from the furnace 10 by means of a gripping device 13, placed on top of one another and rolled into a strip in the first roll stand 6, as a result of which composite steel can be produced in a simple manner and high utilization of the roll stands can be achieved.
    It is also conceivable that two strands 5a, 5b lying on top of one another, that is to say in contact with one another, are introduced into the furnace 10, heated and then immediately introduced into the rolling train and welded. In this variant, a gripping device 13 before and after the furnace 10 would be obsolete and a single strand guide, e.g. a roller conveyor, sufficient as a transport device.
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    LIST OF REFERENCE NUMBERS
    1 pan 5 2 liquid metal 3a, 3b, 3c Mold (casting device) 4a, 4b, 4c strand guide downstream of the mold 5a, 5b, 5c single hot strand 6 first mill stand of a hot strip mill io 7 common band 8th common strand management 9 cutter 9a, 9b, 9c Cutting device for strand 5a, 5b, 5c 10 oven 15 1 la, 1 lb casting tube 12 finishing line 13 Gripping device (transport device) 14 admission 15 rolling mill 20 sts mouth point
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    权利要求:
    Claims (17)
    [1]
    claims
    1. Process for the continuous production of steel strip,
    - a continuous caster several casting devices,
    5 preferably comprising molds (3a, 3b, 3c), and each
    Casting device has a downstream strand guide (4a, 4b, 4c),
    - whereby by means of the casting devices strands (5a, 5b, 5c) arise, which over the respective strand guide
    10 (4a, 4b, 4c) are drawn off and rolled in a hot strip mill, characterized in that at least two strands (5a, 5b, 5c) after the strand guides (4a, 4b, 4c) in hot
    State can be arranged one above the other.
    15
    [2]
    2. The method according to claim 1, characterized in that at least two strands (5a, 5b, 5c) are superimposed congruently in the hot state so that they touch each other.
    [3]
    3. The method according to claim 2, characterized in that
    20 at least two contacting endless strands (5a, 5b, 5c) are connected to one another by means of rolling in a first rolling stand (6) of the hot strip mill to form a strip (7).
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    [4]
    4. The method according to claim 1, characterized in that at least two strands through at least one
    Cutting device (9) cut and in an oven (10) in superimposed receptacles (14) for strands
    [5]
    5 stored one above the other.
    5. The method according to claim 4, characterized in that at least two strands (5a, 5b, 5c) cut, arranged one above the other, in particular placed one on top of the other, and the furnace (10) in one another
    10 arranged state, especially in a superimposed state, are supplied.
    [6]
    6. The method according to claim 4 or 5, characterized in that the distance between the strands (5a, 5b, 5c) in the furnace (10) at most two strand thicknesses, in particular at most one
    15 strand thickness is.
    [7]
    7. The method according to any one of claims 4 to 6, characterized in that strands (5a, 5b, 5c) the receptacles (14) of the furnace (10) by means of at least one
    Transport device, in particular a gripping device
    20 (13), selectively fed and / or removed.
    [8]
    8. The method according to any one of claims 4 to 7, characterized in that the strands (5a, 5b, 5c) individually
    25/37
    201600318 first rolling stand (6) are fed to the hot strip mill.
    [9]
    9. The method according to any one of claims 4 to 7, characterized in that the strands (5a, 5b, 5c) together,
    5 namely lying one above the other, are fed to the first rolling stand (6) of the hot strip mill.
    [10]
    10. Apparatus for carrying out a method for the continuous production of steel strip, one
    Continuous casting plant at least two casting devices, io in particular comprising molds (3a, 3b, 3c), and each
    Casting device has a downstream strand guide (4a, 4b, 4c), characterized in that the
    Casting devices are arranged at a distance from one another and / or one above the other and / or next to one another and
    15 the respective strand guides (4a, 4b, 4c) of the
    Pouring devices open into a common strand guide (8) in which the strands (5a, 5b, 5c) can be arranged one above the other.
    [11]
    11. The device according to the preceding claim, characterized
    20 characterized in that the distance between the casting devices, in particular the molds (3a, 3b, 3c), is less than or equal to 2m, preferably less than or equal to 1m
    Touch, preferably congruent
    Superposition of the respective hot strands
    26/37
    201600318 (5a, 5b, 5c) on the common strand guide (8).
    [12]
    12. The apparatus of claim 10 or 11, characterized in that a first roll stand (6)
    5 Hot strip mill immediately after an intersection (M) of the strand guides (4a, 4b, 4c) in the common
    Strand guide (8) is arranged.
    [13]
    13. The apparatus according to claim 12, characterized in that after the strand guides (4a, 4b, 4c), in particular before
    10 opening point (M) in the common strand guide (8), at least one cutting device (9) is arranged and an oven arranged after the at least one cutting device (9) and after the common strand guide (8) at least two, preferably three to five,
    Has 15 superimposed receptacles (14) for strands (5a, 5b, 5c).
    [14]
    14. The apparatus according to claim 13, characterized in that at least one transport device, in particular one
    Gripping device (13), before and / or after the furnace (10)
    20 is arranged.
    [15]
    15. The apparatus according to claim 13 or 14, characterized in that the distance between the receptacles (14)
    27/37
    201600318 is a maximum of two strand thicknesses to one another, preferably a maximum of one strand thickness.
    [16]
    16. The device according to one of claims 10 to 15, characterized in that a common pan (1) for the
    5 molds (3a, 3b, 3c) is provided and has a plurality of pouring tubes (11a, 11b) arranged one behind the other
    [17]
    17. The device according to the preceding claim, characterized in that the pan (1) has at least one, preferably at least two chambers.
    18. Device according to one of claims 10 to 15, characterized in that at least two pans (1) for the
    Molds (3a, 3b, 3c) are provided.
    28/37
    201600318
    29/37
    30/37
    201600318
    31/37
    201600318
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    同族专利:
    公开号 | 公开日
    WO2018158420A1|2018-09-07|
    AT519697B1|2021-01-15|
    EP3589436A1|2020-01-08|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US3971123A|1973-03-05|1976-07-27|Olsson International Inc.|Process of solidifying molten metal|
    EP0053600A1|1980-12-02|1982-06-09|VOEST-ALPINE Aktiengesellschaft|Method of producing a heavy plate of steel|
    EP0493360A1|1990-12-20|1992-07-01|VOEST-ALPINE INDUSTRIEANLAGENBAU GESELLSCHAFT m.b.H.|A continuous slab caster arrangement followed by a rolling mill|
    WO2007090455A1|2006-02-08|2007-08-16|Sms Demag Ag|Roller hearth furnace for heating and/or temperature equalisation of steel or steel alloy continuous cast products and arrangement thereof before a hot strip final rolling mill|
    EP2944386A1|2014-05-13|2015-11-18|Primetals Technologies Austria GmbH|Apparatus and method for production of long metal products|
    DE3816469A1|1988-05-13|1989-11-23|Schloemann Siemag Ag|Multi-strand continuous casting installation with a downstream continuous rolling mill|
    WO2014135710A1|2013-03-08|2014-09-12|Sms Siemag Ag|Method for producing a metal strip by casting and rolling|CN111151575A|2018-11-07|2020-05-15|东莞东阳光科研发有限公司|Compounding equipment and compounding method for aluminum-based composite plate strip|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    ATA50168/2017A|AT519697B1|2017-03-03|2017-03-03|Process for the continuous production of steel strip|ATA50168/2017A| AT519697B1|2017-03-03|2017-03-03|Process for the continuous production of steel strip|
    PCT/EP2018/055161| WO2018158420A1|2017-03-03|2018-03-02|Method and device for the continuous production of steel strip|
    EP18708678.0A| EP3589436A1|2017-03-03|2018-03-02|Method and device for the continuous production of steel strip|
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