EP3658305B1 - Dispositif de refroidissement de cage permettant le refroidissement d'un feuillard en acier dans une cage de laminoir - Google Patents

Dispositif de refroidissement de cage permettant le refroidissement d'un feuillard en acier dans une cage de laminoir Download PDF

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Publication number
EP3658305B1
EP3658305B1 EP18743776.9A EP18743776A EP3658305B1 EP 3658305 B1 EP3658305 B1 EP 3658305B1 EP 18743776 A EP18743776 A EP 18743776A EP 3658305 B1 EP3658305 B1 EP 3658305B1
Authority
EP
European Patent Office
Prior art keywords
stand
cooler
cooling
water tank
roll stand
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP18743776.9A
Other languages
German (de)
English (en)
Other versions
EP3658305A1 (fr
Inventor
Thomas Lengauer
Bernd Linzer
Alois Seilinger
Michael Zahedi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Primetals Technologies Austria GmbH
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Primetals Technologies Austria GmbH
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Publication date
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Publication of EP3658305A1 publication Critical patent/EP3658305A1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
    • B21B45/0203—Cooling
    • B21B45/0209—Cooling devices, e.g. using gaseous coolants
    • B21B45/0215—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes
    • B21B45/0218—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes for strips, sheets, or plates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
    • B21B1/24—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process
    • B21B1/26—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process by hot-rolling, e.g. Steckel hot mill
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
    • B21B2001/225—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length by hot-rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
    • B21B27/06—Lubricating, cooling or heating rolls
    • B21B27/10—Lubricating, cooling or heating rolls externally
    • B21B2027/103—Lubricating, cooling or heating rolls externally cooling externally
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2203/00—Auxiliary arrangements, devices or methods in combination with rolling mills or rolling methods
    • B21B2203/06—Cassettes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2203/00—Auxiliary arrangements, devices or methods in combination with rolling mills or rolling methods
    • B21B2203/28—Mounting or dismounting bearing and chock as a unit
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2261/00—Product parameters
    • B21B2261/20—Temperature
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
    • B21B31/08—Interchanging rolls, roll mountings, or stand frames, e.g. using C-hooks; Replacing roll chocks on roll shafts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
    • B21B45/0203—Cooling
    • B21B45/0209—Cooling devices, e.g. using gaseous coolants
    • B21B45/0215—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes
    • B21B45/0233—Spray nozzles, Nozzle headers; Spray systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
    • B21B45/0239—Lubricating
    • B21B45/0245—Lubricating devices
    • B21B45/0248—Lubricating devices using liquid lubricants, e.g. for sections, for tubes
    • B21B45/0251—Lubricating devices using liquid lubricants, e.g. for sections, for tubes for strips, sheets, or plates

Definitions

  • the present invention relates to rolling mill technology, in particular to the hot rolling and cooling of a metal strip, such as steel strip, or sheet metal in a rolling train.
  • the rolling mill can be, for example, a finishing mill for strip production or a hot rolling mill for sheet metal production.
  • the invention relates to a roll stand with a roll stand on the operator side and a roll stand on the drive side, with no work rolls and no chocks for the work rolls being arranged in the roll stand.
  • the invention relates to a method for installing a stand cooler for cooling a steel strip in a roll stand, and a method for removing such a stand cooler from a roll stand.
  • a roll stand with removed chocks and removed work rolls is also referred to as a roll stand in this document. This nomenclature is self-evident for the person skilled in the art and increases clarity.
  • the hot rolling stock is plastically deformed in a roll gap by so-called work rolls, as a result of which, for example, the thickness of the rolling stock is reduced.
  • the rolled stock is typically cooled in a cooling line and then removed from the rolling line, for example as a coil or sheet.
  • the material properties of a hot-rolled strip not only depend on its chemical composition, but also depend very much on the chronological sequence of the processing steps in the hot-rolling mill.
  • a combined casting and rolling plant e.g. an Arvedi ESP plant
  • the chronological sequence of continuous casting, rough rolling, intermediate heating, finish rolling, cooling and coiling is essential.
  • the time interval between the last rolling pass in a roll stand of the rolling train and the start of cooling of the strip is also decisive. In many cases, this period of time should be as short as possible.
  • Hot rolling mills have a fixed number of roll stands, so that due to the high technical complexity of these machines it is not possible to remove one or more roll stands of the rolling mill when producing thick strips and to add back removed roll stands when producing thin strips. Thus, in general, a rolling mill must be capable of producing both thick and thin strips.
  • the transport speed of the strip is indirectly proportional to the strip thickness.
  • the continuous operation means that the intermediate or finished strip cannot be accelerated on the roller table, since it is coupled to the continuous casting plant.
  • the transport speed of a thick strip in an ESP plant can be in the range of 0.5 m/s or less and is therefore significantly slower than in other hot rolling mills that are not operated endlessly, which transport the rolled stock before, during or after the rolling mill. can accelerate after passing through the rolling train.
  • interstand cooling for cooling a steel strip behind a roll stand.
  • the interstand cooling comprises a lower and an upper water box, the water boxes each having a connection for a coolant and a plurality of cooling nozzles or cooling tubes arranged in the depth direction of the stand cooler.
  • the water tanks can be supplied with coolant via the connections. This allows the underside and the top of the steel strip to be cooled by the cooling nozzles or cooling tubes of the water boxes.
  • the interstand cooling comprises a lower and an upper water tank, the water tanks each having a connection for a coolant and a cooling slot extending in the depth direction.
  • the water tanks can be supplied with coolant via the connections. This allows the bottom and top of the steel strip to be cooled down through the cooling slots in the water tanks.
  • the prior art does not reveal how the problem of the long period of time in the case of thick strips between the last rolling pass and the start of cooling in hot rolling mills, in particular in continuous cast-rolling compound plants, can be overcome.
  • the object of the invention is to change the existing state of the art with an innovative solution for a hot rolling mill, in particular a casting-rolling compound system and here especially for an endlessly operated casting-rolling compound system, so that the period of time between the last Roll pass during hot rolling and the start of strip cooling can be reduced without having to remove one or more roll stands from the hot rolling mill before the production of thick strips or without having to reinstall removed roll stands before the subsequent production of thin strips.
  • the solution is intended to expand the product mix of the hot rolling mill and enable a wide range of high-quality steel strip to be produced.
  • stand cooler refers to a cooling device that cools a steel strip with adjustable intensity and can be installed in a rolling stand in place of chocks and work rolls. The designation explicitly does not refer to a cooling device that cools the rolls of a roll stand!
  • the framework cooler can also have a combination of several cooling nozzles or cooling tubes and one or more cooling slots.
  • the stand cooler can be installed in the rolling mill instead of chocks and upper and lower work rolls, so that the rolling mill with the stand cooler can cool the top and bottom of a steel strip with a given intensity. This means a cooling that is comparable to the cooling in a cooling section downstream of the rolling train.
  • the stand cooler has at least two guide surfaces, the guide surfaces being connected to the lower or upper water tank, so that the stand cooler is introduced into the roll stand in the width direction of the roll stand or the steel strip (e.g. pushed in) and preferably the frame cooler rests on the guide surfaces when installed.
  • the at least two guide surfaces which are connected to the upper and/or the lower water box, allow the stand cooler to be introduced into the roll stand in a simple manner in the width direction of the roll stand, e.g. on rails. After retracting the scaffold cooler, it can remain on the rails or, for example, be supported by the bending block. When installed, the framework cooler preferably rests on the guide surfaces.
  • the time between the finish rolling (i.e. the last rolling pass in the hot rolling mill) and the beginning of the strip cooling can be drastically reduced, so that, for example, even thick hot strip has the necessary metallurgical properties (e.g. structure ) and can be produced with high quality.
  • the section between the last rolling roll stand and the cooling section is already being used for cooling.
  • the stand cooler is installed or removed mainly during an interruption in rolling operation (eg when changing the work rolls of other roll stands), it is advantageous if the stand cooler is designed in one piece, with preferably the lower and the upper water box are connected to each other by uprights.
  • the framework cooler can be installed and removed as a unit.
  • the stand cooler is also to be able to be installed or removed during rolling operation, it is advantageous if the stand cooler is designed in at least two pieces, with the lower and the upper water box each having two guide surfaces. This allows the upper part of the stand cooler with the upper water box to be installed in the mill stand independently of the lower part of the stand cooler with the lower water box, thereby facilitating the installation during the continuous rolling operation.
  • a one-piece design would also be possible, e.g. with a "C" shape of the framework cooler.
  • the lower water box can be brought into the roll stand, e.g can be.
  • the gap between the outlet openings of the water tanks and the steel strip can be adjusted during operation.
  • the lower water tank and the upper water tank have at least two connections.
  • the cooling nozzles assigned to the edge areas are supplied with a lower pressure than the cooling nozzles assigned to the central area.
  • the roll stand has (at least) back-up rolls.
  • the stand cooler is arranged between the back-up rolls of the roll stand when installed in the roll stand.
  • the stand cooler In normal operation of each roll stand, the stand cooler is not present, but work rolls and chocks for the work rolls.
  • the stand cooler of the present invention is installed in the rolling stand as an alternative to the work rolls and the chocks for the work rolls.
  • the roll stand therefore preferably also has the work rolls and chocks mentioned for the work rolls.
  • the work rolls and the chocks for the work rolls are dimensioned such that after the stand cooler has been removed from the roll stand, they can be installed in the roll stand through the operator-side roll stand of the roll stand.
  • connections can be connected e.g. by flange connections, by manually operated lever arm couplings with hose connection or by automatic coupling when the scaffold cooler is pushed in.
  • the stand cooler is installed while the rolling train, in particular a finishing train, is in operation.
  • a port is supplied by a coolant under a pressure of 2 to 5 bar.
  • a connection is supplied by a coolant under a pressure of 0.1 to 0.8 bar.
  • connection or connections of the lower water box with a higher pressure than the connection or connections of the upper water box.
  • This can be done by separate pressure controls for the top and bottom ports.
  • this can be done by flow controls so that the flow rate to the lower plenum is higher than to the upper plenum (e.g. 60% of the total water flow goes to the lower plenum and 40% to the upper plenum).
  • the edge area of the steel strip can be cooled through a first connection with a coolant under a pressure of 0.1 to 0.8 bar, whereas the center area can be cooled through a second connection with a coolant can be cooled under a pressure of 2 to 5 bar.
  • a first steel strip is rolled in at least two roll stands of a hot rolling train, the first steel strip is then cooled in a cooling section and the cooled first steel strip is then conveyed out - for example as a plate or coil.
  • a stand cooler (as described above) is installed in a roll stand of the rolling mill. After the stand cooler has been installed in the rolling stand, a second steel strip is rolled in at least one rolling stand of the rolling train, the second steel strip is cooled in at least one rolling stand of the rolling train using the stand cooler, the cooled second steel strip is cooled in the cooling section, and the cooled second steel strip is conveyed out.
  • connections can in turn be separated, for example, by means of flange connections, manually operated lever arm couplings with hose connections or by automatic coupling when the frame cooler is pushed out.
  • the stand cooler can be removed take place during ongoing operation or during a break in operation of a rolling train.
  • a cooling model supplies online, i.e. during ongoing operation of the hot rolling mill, a quantity of cooling water and, if necessary, a width-dependent cooling water distribution for the upper and lower side of the steel strip.
  • the pressure and/or the flow rate of the cooling medium through the stand cooler are set in a controlled or regulated manner so that the steel strip achieves the desired properties in the best possible way after passing through the roll stands with the built-in stand coolers and cooling in the cooling section.
  • the figure 1 shows on the left a side view of a roll stand 11 with built-in chocks 4a, 4b for an upper and lower one Backup roll 4 and built-in chocks 5a, 5b for an upper and lower work roll 5.
  • the right representation of figure 1 shows the roll stand 11 in a schematic sectional view without chocks 4a, 4b, 5a, 5b.
  • a hot strip not shown, here a steel strip, is rolled in the roll stand 11 by the work rolls 5, with the work rolls 5 being supported on the back-up rolls 4 located behind them.
  • a bending block 6 can bend the work rolls 5 and thus adjust the profile or flatness of the rolled hot strip.
  • the chocks 4a, 4b, 5a, 5b, the so-called AGC (short for Automatic Gap Control) cylinder 3 and the bending block 6 are installed in the two stand windows 2 of the roll stand 1. Only the roller stand 1 on the operator side can be seen in FIG. The roller stand on the drive side is covered by the roller stand 1 on the operator side. only in figure 11 it can be seen, but is not identified there with a reference number.
  • AGC Automatic Gap Control
  • the hot strip is guided on a rolling table 10 and brought to the work rolls 5 .
  • at least one (here two) upper cooling head 8a and at least one (here two) lower cooling head 8b of the work roll cooling system are provided before and after the work rolls 5.
  • an upper cooling head of the interstand cooling system 7a is installed before the roll stand 11, and a lower cooling head of the interstand cooling system 7b is installed after the rolling stand 11.
  • an upper and a lower cooling head of the interstand cooling 7a, 7b can also be arranged before and after the roll stand 11.
  • a swiveling looper roller 9 can adjust the tension in the hot strip.
  • the temperature of the hot strip can be changed before and after rolling. Since roll stands 11 with so-called stand fixtures are known, a more detailed description of the prior art is omitted.
  • Fig. 12 is a left side view and right is a front view of a chock 5a having an upper work roll 5 and a chock 5b having a lower work roll 5 shown.
  • the work rolls 5 are displaceably mounted in the roll stand 11 by the chocks 5a, 5b.
  • the figure 3 shows the roll stand 11 figure 1 in a rolling mill.
  • a steel strip not shown, is fed to the roll stand 11 on a roller table 12 in the transport direction TR and rolled in the roll gap between the two work rolls 5 .
  • the rolled strip is again guided on the following roller table 12 to a cooling section 45 with a plurality of cooling distributors 13 and cooled there with an adjustable intensity.
  • the figure 4 shows a possible situation when rolling a thick hot strip in a rolling train 40 designed as a finishing train with five roll stands 11. Since it is a thick hot strip, the last rolling pass takes place in the third (ie in the middle) roll stand 11. The thickness of the hot strip is reduced - for example - from 45 mm to 20 mm. After rolling, the finished rolled strip leaves the central roll stand 11 at a speed of, for example, 0.4 m/s. In the areas marked C, the finished strip can be cooled by the upper and lower cooling heads of the interstand cooling system 7a, 7b. The finished strip cannot be cooled in the roll stands 11 themselves. The uncooled areas are marked with NC.
  • the rolled Hot strip according to the above example 50 s until it reaches the cooling section 45. This time is already too long for certain types of steel, so that the steel strip can no longer achieve the desired microstructure or phase properties.
  • the interstand cooling (marked C in the figure) with the upper and lower cooling heads 7a, 7b (see figure 1 ) does not change anything because the cooling capacity is too low and the rolled Hot strip on the way to the cooling section 45 is mostly not cooled.
  • the figure 5 shows the situation during hot rolling of a thick steel strip in a rolling train 40 designed as a finishing train with originally five roll stands 11.
  • the chocks 5a, 5b and the work rolls 5 removed and instead a scaffolding cooler 20 each (details in the Figures 6 to 11 ) installed 1 per roller stand.
  • the last roll pass takes place in the second roll stand 11 from the left; the finished strip is intensively cooled in each of the three subsequent roll stands 1 by a stand cooler 20 .
  • the finished strip is already cooled from the middle roll stand 1. This makes it possible to produce thick strips of special steel grades (eg demanding tube grades) that could not be produced without stand cooler 20 .
  • FIG 6 two views of a frame cooler 20 are shown, namely in a side view on the left and in a sectional view on the right.
  • the skeleton cooler 20 has an upper header tank 21a and a lower header tank 21b.
  • the underside of the upper water tank 21a and the upper side of the lower water tank 21b are equipped with cooling nozzles 23 so that a hot strip, not shown here, can be cooled in the width direction B.
  • seven cooling nozzles are arranged one behind the other in the transport direction (see Fig figure 6 to the right).
  • the water tanks 21a, 21b have lateral support straps 25, the support straps 25 of the lower water tank 21b each having a guide surface 26.
  • the stand cooler 20 can be moved into a rolling stand (not shown here) in the width direction B of the hot strip.
  • the frame cooler 20 shown is designed in one piece, with the upper and lower water tanks 21a, 21b being connected to one another by uprights 27.
  • the cooling nozzles 23 are supplied with coolant through a total of four connections 22, two connections 22 supplying the upper and the lower water box 21a, 21b.
  • figure 7 12 is a front view of the scaffold cooler of FIG figure 6 shown.
  • the cooling nozzles 23 are typically supplied with an overpressure of 2 to 5 bar.
  • the cooling intensity depends on the pressure and can be adjusted via the overpressure of the cooling medium.
  • a roll stand 1 with a stand cooler 20 is shown in a side view on the left and a sectional view on the right.
  • the framework cooler 20 from the Figures 6 and 7 When installed, it rests on the two guide surfaces 26 of the lower support straps 25 on guide rails in the roll stand 1 or on the counter-guides of the chock 4b of the lower support roll and can be installed and removed on these.
  • the stand cooler 20 is arranged between the back-up rolls 4, i.e. in a line with the back-up rolls 4.
  • the Figures 9a and 9b show one to the Figures 6 and 7 alternative framework cooler 20, which has cooling slots 24 instead of cooling nozzles. Since the steel strip 50 is not cooled differently in its width direction B or in the depth direction T of the framework cooler 20, it is sufficient if the upper and lower water tanks 21a, 21b each have only one connection 22. The uprights 7 and the straps 25 are as in the Figures 6 and 7 executed.
  • FIG 10 a water line plan for the coolant supply of a roll stand 11 with a built-in stand cooler 20 is shown.
  • a pump 30 fed from a tank 31 represents the coolant supply.
  • the pressure of the cooling medium water is reduced from 13 bar to 4 bar by the pressure control valve 28 and after passing the open switching valve 29 and the flow control valve 32 via connections to the upper and lower water tank 21a, 21b.
  • the top and bottom of a hot strip, not shown here, are cooled by cooling nozzles 23 .
  • the switching valves 29 for the supply of the cooling medium to the cooling heads for cooling the work rolls are closed.
  • FIG 11 the installation of a stand cooler 20 in the roll stand 1 of a roll stand 11 is shown schematically.
  • the chocks 5a, 5b for the work rolls 5 and the work rolls 5 are removed.
  • the stand cooler 20 is then pushed in horizontally in the width direction B of the roll stand 11 through the roll stand 1 on the operator side (shown on the right here).
  • the connections 22 of the stand cooler 20 are connected to a coolant supply, so that an upper side and an underside of a hot strip, not shown, are cooled by the cooling nozzles 23 .
  • the figure 12 shows a schematic section through a stand cooler 20 with cooling tubes 23a instead of cooling nozzles 23 (see figure 6 to the right).
  • Cooling tubes 23a are typically operated with an overpressure of between 0.1 and 1 bar, so that they can easily implement what is known as laminar cooling.
  • FIG 13 is the covering of the edge areas of a steel strip 50, engl. edge masking, shown.
  • at least one edge region of the steel strip 50 in the figure it is four edge areas, by inserting a deflector plate 33 or a channel between the cooling nozzles 23, cooling tubes 23a (see figure 12 ) or the cooling slot 24 (see Figure 9b ) of the stand cooler 20 and the surface of the steel strip 50 are covered so that the edge portion is not cooled.
  • the cooling water from the cooling nozzles 23 or cooling tubes is discharged to the outside in the direction of the width of the steel strip 50 .
  • the position of the deflector plate 33 or the chute can be finely adjusted manually or automatically (e.g. by an actuator, not shown, which displaces the deflector plate 33 in the direction of the arrow), so that overcooling of the edge areas is reliably prevented.
  • FIG 14 is an alternative scaffold cooler 20 to the scaffold cooler of FIG figure 7 shown in C shape. Since the C-shaped stand cooler 20 is open at one end in the width direction B, the stand cooler 20 can be easily mounted on and removed from a rolling mill stand during ongoing operation of the rolling mill.
  • the connections 22 of the upper and lower water box 21a, 21b, the cooling nozzles 23 and the guide surfaces 26 are identical to figure 7 .
  • the frame cooler 20 could also have wheels for guiding on a rail.
  • the uprights 27 are only arranged at one end of the stand cooler, for example the operator end.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)

Claims (15)

  1. Cage de laminoir (11) qui comprend un montant de cage de laminoir (1) du côté de l'exploitation et un montant de cage de laminoir du côté de la commande ;
    - dans laquelle aucun cylindre de travail (5) et aucune empoise (5a, 5b) pour les cylindres de travail (5) ne sont disposés dans la cage de laminoir (11), la cage de laminoir (11) présentant néanmoins un refroidisseur de cage (20) pour le refroidissement d'un feuillard en acier (50) ;
    - dans laquelle le refroidisseur de cage (20) est dimensionné d'une manière telle qu'il peut être incorporé, à travers le montant de cage de laminoir (1) du côté de l'exploitation de la cage de laminoir (11), à la place des empoises (5a, 5b), ainsi que du cylindre de travail supérieur et du cylindre de travail inférieur (5), dans la cage de laminoir (11) ;
    - dans laquelle le refroidisseur de cage (20) comprend une boîte à eau inférieure (21b) et une boîte à eau supérieure (21a) ; dans laquelle la boîte à eau inférieure (21b) et la boîte à eau supérieure (21a) présentent respectivement un raccord (22) pour un agent de refroidissement et plusieurs buses de refroidissement (23) ou tubes de refroidissement (23a) qui sont disposés dans la direction en profondeur (T) du refroidisseur de cage (20) ou au moins une fente de refroidissement (24) qui s'étend dans la direction en profondeur (T) du refroidisseur de cage (20), d'une manière telle que les boîtes à eau inférieure et supérieure (21b, 21a) peuvent être alimentées avec un agent de refroidissement par l'intermédiaire du raccord respectif (22) et que le côté inférieur du feuillard en acier (50) peut être refroidi par l'intermédiaire des buses de refroidissement (23) ou des tubes de refroidissement (23a) ou de la fente de refroidissement (24) de la boîte à eau inférieure (21b) et que le côté supérieur du feuillard en acier (50) peut être refroidi par l'intermédiaire des buses de refroidissement (23) ou des tubes de refroidissement (23a) ou de la fente de refroidissement (24) de la boîte à eau supérieure (21a).
  2. Cage de laminoir (11) selon la revendication 1, caractérisée en ce que le refroidisseur de cage (20) présente au moins deux surfaces de guidage (26) ; dans laquelle les surfaces de guidage (26) sont reliées à la boîte à eau inférieure (21b) ou à la boîte à eau supérieure (21a), d'une manière telle que le refroidisseur de cage (20) peut être inséré dans la direction en largeur (B) de la cage de laminoir (11) dans la cage de laminoir (11).
  3. Cage de laminoir (11) selon l'une quelconque des revendications 1 ou 2, caractérisée en ce que le refroidisseur de cage (20) est réalisé en une seule pièce ; dans laquelle les boîte à eau inférieure et supérieure (21b, 21a) sont reliées l'une à l'autre par l'intermédiaire de montants (27).
  4. Cage de laminoir (11) selon l'une quelconque des revendications 1 ou 2, caractérisée en ce que le refroidisseur de cage (20) est réalisé au moins en deux pièces ; dans laquelle les boîtes à eau inférieure et supérieure (21b, 21a) présentent respectivement deux surfaces de guidage (26).
  5. Cage de laminoir (11) selon l'une quelconque des revendications 1 à 4, caractérisée en ce que la boîte à eau inférieure (21b) et/ou la boîte à eau supérieure (21a) présente(nt) chacune deux pattes de support latérales (25) ; dans laquelle les pattes de support (25) présentent chacune une surface de guidage (26).
  6. Cage de laminoir (11) selon l'une quelconque des revendications 1 à 4, caractérisée en ce que la boîte à eau inférieure (21b) et la boîte à eau supérieure (21a) présentent chacune un premier et un deuxième raccord (22), d'une manière telle que l'on peut refroidir fortement de manière différente les zones marginales du feuillard en acier (50) par l'intermédiaire du premier raccord respectif (22) et la zone centrale du feuillard en acier (50) par l'intermédiaire du deuxième raccord respectif (22).
  7. Cage de laminoir (11) selon l'une quelconque des revendications 1 à 6, caractérisée en ce que la cage de laminoir (11) présente des cylindres de support (4), et en ce que le refroidisseur de cage (20) est disposé à l'état encastré entre les cylindres de support (4) de la cage de laminoir (11).
  8. Cage de laminoir (11) selon l'une quelconque des revendications 1 à 7, caractérisée en ce qu'elle présente en outre des cylindres de travail (5) et des empoises (5a, 5b) pour les cylindres de travail (5), et en ce que les cylindres de travail (5) et les empoises (5a, 5b) pour les cylindres de travail (5) sont dimensionnés d'une manière telle que, après un démontage du refroidisseur de cage (20) hors de la cage de laminoir (11), ils peuvent être incorporés dans la cage de laminoir (11) à travers les montants de cage de laminoir (1) du côté de l'exploitation, de la cage de laminoir (11).
  9. Procédé destiné à l'incorporation d'un refroidisseur de cage (20) destiné au refroidissement d'un feuillard en acier (50) dans une cage de laminoir (11) d'un train de laminoir ; dans lequel le refroidisseur de cage (20) comprend une boîte à eau inférieure (21b) et une boîte à eau supérieure (21a) ; dans laquelle la boîte à eau inférieure (21b) et la boîte à eau supérieure (21a) présentent respectivement un raccord (22) pour un agent de refroidissement et plusieurs buses de refroidissement (23) ou tubes de refroidissement (23a) qui sont disposés dans la direction en profondeur (T) du refroidisseur de cage (20) ou au moins une fente de refroidissement (24) qui s'étend dans la direction en profondeur (T) du refroidisseur de cage (20), qui présente les étapes de procédé dans lesquelles :
    - on retire de la cage de laminoir (11) des empoises (5a, 5b), ainsi qu'un cylindre de travail supérieur et un cylindre de travail inférieur (5) ;
    - on incorpore le refroidisseur de cage (20) à la place des empoises (5a, 5b) et des cylindres de travail supérieur et inférieur (5) dans la cage de laminoir (11) ; dans lequel le refroidisseur de cage (20) est incorporé horizontalement dans la direction en largeur (B) de la cage de laminoir (11) à travers un montant de cage de laminoir (1) du côté de l'exploitation ; et
    - on relie les raccords (22) des boîtes à eau supérieure et inférieure (21b, 21a) à une alimentation d'un agent de refroidissement, d'une manière telle que l'on peut refroidir à l'aide d'un agent de refroidissement le côté inférieur et le côté supérieur du feuillard en acier (50) par l'intermédiaire des buses de refroidissement (23) ou des tubes de refroidissement (23a) ou de la fente de refroidissement (24) de la boîte à eau inférieure (21b) et de la boîte à eau supérieure (21a).
  10. Procédé selon la revendication 9, caractérisé en ce que le montage du refroidisseur de cage (20) a lieu pendant l'exploitation en cours du train de laminoir (40) ou pendant une interruption de l'exploitation du train de laminoir (40).
  11. Procédé selon l'une quelconque des revendications 9 ou 10, caractérisé en ce que l'agent de refroidissement alimente au moins un raccord (22) sous une pression de 2 à 5 bar.
  12. Procédé selon l'une quelconque des revendications 9 à 11, caractérisé en ce que l'agent de refroidissement alimente au moins un raccord (22) sous une pression de 0,1 à 1 bar.
  13. Procédé destiné au laminage de feuillards en acier dans un train de laminoir (40) qui présente plusieurs cages de laminoir (11), qui comprend les étapes de procédé dans lesquelles :
    - on soumet à un laminage à chaud un premier feuillard en acier dans au moins deux cages de laminoir (11) du train de laminoir (40) ;
    - on refroidit le premier feuillard en acier dans un tronçon de refroidissement (45) ;
    - on évacue le premier feuillard en acier qui a été refroidi ;
    - on procède à l'incorporation d'un refroidisseur de cage (20) conformément à un procédé selon l'une quelconque des revendications 9 à 12 ;
    - on soumet à un laminage à chaud un deuxième feuillard en acier dans au moins une cage de laminoir (11) du train de laminoir (40) ;
    - on refroidit le deuxième feuillard en acier dans au moins une cage de laminoir (11) du train de laminoir au moyen du refroidisseur de cage (20) ;
    - on refroidit le deuxième feuillard en acier qui a été refroidi, dans le tronçon de refroidissement (45) ;
    - on évacue le deuxième feuillard en acier qui a été refroidi.
  14. Procédé destiné au démontage d'un refroidisseur de cage (20) qui est destiné au refroidissement d'un feuillard en acier (50) hors d'une cage de laminoir (11) d'un train de laminoir ; dans lequel le refroidisseur de cage (20) comprend une boîte à eau inférieure (21b) et une boîte à eau supérieure (21a) ; dans lequel la boîte à eau inférieure (21b) et la boîte à eau supérieure (21a) présentent respectivement un raccord (22) pour un agent de refroidissement et plusieurs buses de refroidissement (23) ou tubes de refroidissement (23a) qui sont disposés dans la direction en profondeur (T) du refroidisseur de cage (20) ou au moins une fente de refroidissement (24) qui s'étend dans la direction en profondeur (T) du refroidisseur de cage (20), qui présente les étapes de procédé dans lesquelles :
    - on sépare les raccords (22) des boîtes à eau supérieure et inférieure (21b, 21a) par rapport à une alimentation d'un agent de refroidissement ;
    - on démonte le refroidisseur de cage (20) par rapport à la cage de laminoir (1) ; dans lequel le refroidisseur de cage (20) est extrait horizontalement d'un montant de cage de laminoir (1) du côté de l'exploitation, dans la direction en largeur (B) de la cage de laminoir (11) ;
    - on incorpore, dans la cage de laminoir (11), des empoises (5a, 5b), ainsi qu'un cylindre de travail supérieur et un cylindre de travail inférieur (5) à la place du refroidisseur de cage (20).
  15. Procédé selon la revendication 14, caractérisé en ce que le démontage du refroidisseur de cage (20) a lieu pendant l'exploitation en cours d'un train de laminoir (40) ou pendant une interruption de l'exploitation d'un train de laminoir (40).
EP18743776.9A 2017-07-24 2018-07-19 Dispositif de refroidissement de cage permettant le refroidissement d'un feuillard en acier dans une cage de laminoir Active EP3658305B1 (fr)

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Application Number Priority Date Filing Date Title
EP17182794.2A EP3434383A1 (fr) 2017-07-24 2017-07-24 Dispositif de refroidissement de cage permettant le refroidissement d'un feuillard en acier dans une cage de laminoir
PCT/EP2018/069668 WO2019020492A1 (fr) 2017-07-24 2018-07-19 Cage de laminage présentant un refroidisseur de cage pour le refroidissement d'un feuillard en acier

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EP3658305B1 true EP3658305B1 (fr) 2022-06-29

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EP18743776.9A Active EP3658305B1 (fr) 2017-07-24 2018-07-19 Dispositif de refroidissement de cage permettant le refroidissement d'un feuillard en acier dans une cage de laminoir

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US (2) US11331704B2 (fr)
EP (2) EP3434383A1 (fr)
CN (1) CN110891702B (fr)
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WO (1) WO2019020492A1 (fr)

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US11712725B2 (en) 2023-08-01
US20200156130A1 (en) 2020-05-21
EP3658305A1 (fr) 2020-06-03
RU2020105861A3 (fr) 2021-11-09
CN110891702A (zh) 2020-03-17
WO2019020492A1 (fr) 2019-01-31
US20220241833A1 (en) 2022-08-04
RU2766925C2 (ru) 2022-03-16
CN110891702B (zh) 2021-10-15
US11331704B2 (en) 2022-05-17
RU2020105861A (ru) 2021-08-25
EP3434383A1 (fr) 2019-01-30

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