EP3658305A1 - Cage de laminage présentant un refroidisseur de cage pour le refroidissement d'un feuillard en acier - Google Patents

Cage de laminage présentant un refroidisseur de cage pour le refroidissement d'un feuillard en acier

Info

Publication number
EP3658305A1
EP3658305A1 EP18743776.9A EP18743776A EP3658305A1 EP 3658305 A1 EP3658305 A1 EP 3658305A1 EP 18743776 A EP18743776 A EP 18743776A EP 3658305 A1 EP3658305 A1 EP 3658305A1
Authority
EP
European Patent Office
Prior art keywords
cooler
cooling
scaffold
rolling
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.)
Granted
Application number
EP18743776.9A
Other languages
German (de)
English (en)
Other versions
EP3658305B1 (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
Original Assignee
Primetals Technologies Austria GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Primetals Technologies Austria GmbH filed Critical Primetals Technologies Austria GmbH
Publication of EP3658305A1 publication Critical patent/EP3658305A1/fr
Application granted granted Critical
Publication of EP3658305B1 publication Critical patent/EP3658305B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • 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
    • 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
    • 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
    • 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
    • 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 mills, particularly in the ⁇ hot rolling and cooling a metal strip, for example a steel strip or sheet in a rolling mill.
  • the rolling mill can be eg. A finishing mill for strip production or a hot rolling mill for the production act Blechpro ⁇ .
  • the invention relates to a rolling stand with an operator-side roll stand and a drive-side roll stand, wherein no work rolls and no chocks for the work rolls are arranged in the roll stand.
  • the invention relates to a method for installing a scaffold cooler for cooling a steel strip in a rolling stand, as well as a method for removing such a scaffold cooler from a rolling stand.
  • a roll stand with removed chocks and removed work rolls is referred to as a roll stand in this document. This nomenclature is obvious to the person skilled in the art and increases the clarity.
  • the hot rolling stock is plastically deformed in a roll gap by so-called work rolls, whereby, for example, the thickness of the rolled stock is reduced.
  • the rolled rolling stock is typically cooled in a cooling line, and then conveyed out of the rolling mill from ⁇ , eg as a collar or plate.
  • the material properties of a hot-rolled strip are not only dependent on its chemical composition, but also depend very much on the chronological sequence of the processing steps in the hot rolling mill. For example, in a cast-rolled composite plant, for example an Arvedi ESP plant, the chronological sequence of continuous casting, rough rolling, intermediate heating, finish rolling, cooling and coiling is important.
  • Finish rolling is referred to as finished strip) comes to be prevailing ⁇ Lich on the time interval between the last rolling pass in a rolling stand of the rolling train and the start of cooling of the ribbon. In many cases, this time span should be as short as possible.
  • Hot rolling mills have a fixed number of rolling stands, which means that due to the high technical complexity of these machines, it is not possible to remove one or more rolling mills in the production of thick strips and to add removed mills in the production of thin strips. Thus, a rolling mill generally must be suitable for both the production of thicker and for the production of thin ribbons.
  • the intercooler cooling system comprises a lower and an upper water tank, the water tanks each having a connection for a coolant and a plurality of cooling nozzles or cooling pipes arranged in the depth direction of the scaffold cooler.
  • the connections can be used to supply the water tanks with coolant. This allows the underside and top of the steel strip to be cooled by the cooling nozzles or cooling tubes of the water boxes.
  • an interstand cooling is also known.
  • the interstand cooling comprises a lower and an upper water tank, the water tanks each having a connection for a cooling agent and a portion extending in the Tie ⁇ fenraum cooling slot.
  • the water tanks can be supplied with coolant ⁇ the. This allows the underside and top of the steel strip to be cooled by the cooling slots of the water boxes. How to overcome the problem of the long duration of thick belts between the last pass and the beginning of the cooling in hot rolling mills, in particular in endlessly operated casting / rolling compound plants, is not apparent from the prior art.
  • the object of the invention is to mill the existing prior art by an innovative solution to a hot, in particular a casting and rolling system, and especially to modify here for an endlessly driven casting and rolling ⁇ plant so that the Time interval between the last rolling pass during hot rolling and the beginning of the strip cooling ⁇
  • the solution aims to expand the product mix of the hot rolling mill and produce a wide range of high quality steel strip.
  • the solution takes place through a roll stand with a service-side roll stand and a drive-side roll stand,
  • the scaffold cooler is dimensioned such that it can be installed in the rolling stand by the operator-side roll stand of the roll stand,
  • the scaffold cooler comprises a lower water box and an upper water box
  • the lower water tank and the upper water tank each having a connection for a coolant and a plurality of cooling nozzles or cooling tubes arranged in the depth direction of the scaffold cooler or at least one extending in the depth direction of the scaffold cooler cooling slot, so that the lower and the upper water tank through the respective port with Coolant can be supplied and the underside of the steel strip through the cooling nozzles or cooling tubes or the cooling slot of the lower channel box and the top of the steel strip through the cooling nozzles or
  • Cooling tubes or the cooling slot of the upper channel box from ⁇ can be cooled.
  • frame cooler refers to a cooling device, which a steel strip with adjustable intensity can be built into a rolling mill from ⁇ cool and instead of chocks and work rolls. The term does not explicitly refer to a cooling device that cools the rolls of a rolling stand!
  • the scaffold cooler may also have a combination of a plurality of cooling nozzles or cooling tubes and one or more cooling slots.
  • the scaffold cooler can be installed instead of chocks and upper and lower work rolls in the rolling mill, so that the rolling stand with the scaffold cooler can cool the upper and Un ⁇ terseite a steel strip with a given intensity. This is a cooling, which is comparable to the cooling in one of the rolling mill downstream cooling section.
  • the scaffold cooler has an upper and a lower water box, which each have at least one connection for a coolant and
  • At least one extending in the depth direction of the scaffold cooler cooling slot having.
  • the lower and the upper water tank are supplied with coolant.
  • the cooling of the lower and upper side of the steel strip takes place through cooling nozzles or cooling tubes or one or more cooling slots.
  • the scaffold cooler has at least two guide ⁇ surfaces, the guide surfaces are connected to the lower or upper plenum chamber, so that the scaffolding cooler in the width direction of the roll stand and of the steel strip in the Roll stand introduced (eg inserted) who ⁇ can and preferably the scaffold cooler rests in the installed state on the guide surfaces.
  • the scaffold cooler can be introduced in a simple manner in the width direction of the rolling stand, for example on rails, in the rolling stand. After retracting the scaffold cooler, it can remain on the rails or be supported by the bending block, for example.
  • the scaffold is cooler in ⁇ installed state rests on the guide surfaces.
  • the distance between the last rolling mill and the cooling section is already used for cooling.
  • the scaffolding cooler is installed or dismantled mainly during an interruption of the rolling operation (eg when changing the work rolls of other rolling stands), it is advantageous if the scaffold cooler is made in one piece, whereby Preferably, the lower and the upper water tank are connected by posts with each other.
  • the scaffold cooler can be installed and removed as a unit. If the scaffold cooler also during the rolling operation on or can be removed, it is advantageous if the scaffold ⁇ cooler is carried out at least two pieces, wherein the lower and the upper plenum chamber each having two guide surfaces.
  • the upper part of the scaffold cooler with the upper water tank can be installed independently of the lower part of the scaffold cooler with the lower water box in the roll stand, whereby the installation is facilitated during the continuous rolling operation.
  • a one-piece design would also be possible, for example with a "C" shape of the scaffold cooler.
  • the lower water tank can be introduced, for example on change rails in the rolling stand and then remain on these benlei ⁇ ben or raised or lowered by these, whereas the upper water tank can be supported in operation on the bending blocks and raised by these or can be lowered.
  • the gap between the outlet openings of the water tanks and the steel strip can be adjusted.
  • a simple guidance of the scaffold cooler is ensured if the lower water tank and / or the upper water tank each has two lateral support tabs, each of the two support plates each having a guide surface.
  • the lower water tank and the upper water tank have at least two terminals. This can eg the "
  • the cooling nozzles associated with the edge regions are supplied with a lower pressure than the cooling nozzles assigned to the central region.
  • the roll stand has (at least) support rolls.
  • the scaffold cooler is disposed between the backup rolls of the rolling stand in the state installed in the rolling mill stand.
  • the scaffold cooler of the present invention is installed in the mill stand as an alternative to the work rolls and the chocks for the work rolls.
  • the rolling mill in addition, the ge ⁇ called work rolls and chocks on the work rolls.
  • the work rolls and the chocks for the work rolls - as in the prior art - are dimensioned so that they can be installed after removal of the scaffold cooler from the rolling mill by the operator side roll stand of the rolling mill in the rolling mill.
  • a procedural aspect of the invention relating to the installation of a scaffold cooler for cooling a steel strip into a rolling stand of a rolling train is achieved according to claim 9 by the following method steps:
  • connections can be made, for example, by means of flange connections, manually operated lever-arm couplings with hose connections or by automatic coupling when the scaffolding cooler is inserted.
  • ⁇ SSIG In a non-operated endless rolling mill, it is expedient ⁇ SSIG to incorporate the installation of scaffolding cooler during a Radioun ⁇ interruption of the rolling mill.
  • 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.
  • a scaffolding cooler it is advantageous to provide the at ⁇ circuit and the terminals of the lower radiator tank with egg nem higher pressure than the connection or the connections of the upper water tank. This can be done by separate pressure controls for the upper and the lower connection. Alternatively, this can also be done through flow controls so that the flow rate to the lower water box is higher than to the upper water box (eg 60% of the total water volume is supplied to the lower water box and 40% to the upper water box).
  • the edge region of the steel strip can be cooled by a first connection with a coolant under a pressure of 0.1 to 0.8 bar, whereas the center region is cooled by a second connection with a coolant - tel can be cooled under a pressure of 2 to 5 bar.
  • a first steel strip is rolled in at least two rolling stands of a hot rolling line, the first steel strip is then cooled in a cooling section and then the cooled first steel strip - for example as a plate or reel - is discharged.
  • a scaffold cooler (as described above) is installed in a rolling stand of the rolling mill.
  • a second steel strip is rolled in at least one rolling stand of the rolling mill, the second steel strip cooled in at least one mill stand of the rolling mill by means of the scaffold cooler, cooled the cooled second steel strip in the cooling section, and the cooled second steel strip discharged.
  • the disconnection of the terminals may in turn be e.g. by flange connections, manually operated lever arm couplings with
  • Hose connection or by the automatic coupling when pushing out the scaffolding cooler is
  • cooling capacity of the cooler frame as a function of the material (particularly, the chemical composition to ⁇ ) adjust the rolling parameters (thickness and speed of the steel strip), and the quality of steel to be achieved mo ⁇ dell controlled.
  • a cooling model provides in depen ⁇ dependence of the aforementioned values online, ie during the lauryl fenden operation of the hot rolling mill, depending on a cooling water flow and possibly also a broad-based cooling water distribution for the top and bottom of the steel strip.
  • the pressure and / or the flow rate of the cooling medium through the scaffold cooler are adjusted in a controlled manner, so that the steel strip reaches the desired properties in the best possible way after passing through the rolling stands with the built-in scaffold coolers and cooling in the cooling section.
  • Figure 1 shows two views of a rolling mill with built- ⁇ th chocks and work rolls after the
  • FIG. 3 is a side view of a rolling stand in front of a
  • 4 is a side view of a finishing train with five rolling stands in front of a cooling line according to the prior art
  • 5 is a side view of a finishing train with five rolling stands, wherein in the last three stands each scaffold ⁇ cooler is installed,
  • FIG. 6 shows two views of a scaffold cooler
  • FIG. 7 shows another view of the scaffold cooler of FIG.
  • 9a and 9b each show a view of a scaffold cooler with a
  • FIG. 10 is a schematic representation of the Wasserwirt ⁇ shaft for a rolling stand with a built ⁇ th scaffolding cooler
  • FIG. 11 shows a section in the width direction through a roll stand with a built-in scaffold cooler
  • FIG. 12 is a view of a scaffold cooler withoniaroh ⁇ ren instead of cooling nozzles
  • FIG. 13 is a front view of a scaffold cooler with
  • Figure 14 is a view of a one-piece scaffold cooler in C-shape.
  • FIG. 1 shows on the left a side view of a roll stand 11 with built-in chocks 4a, 4b for an upper and lower Re support roller 4 and built-in chocks 5a, 5b for an upper and lower work roll 5.
  • the right-hand illustration of Figure 1 shows the rolling stand 11 in a schematic sectional ⁇ presentation without chocks 4a, 4b, 5a, 5b.
  • a not illustrated posed hot strip in this case a steel strip is rolled in the roll stand 11 by the work rolls 5, wherein the working ⁇ rollers 5 rest on the underlying support rollers. 4 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 stator windows 2 of the roll stand 1.
  • AGC short for Automatic Gap Control
  • FIG. 1 only the operator-side roll stand 1 can be seen.
  • the roll stand on the drive side is covered by the operator-side roll stand 1. Only in Fig 11 it can be seen, but not designated there by a reference numeral.
  • 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 are provided before and after the work rolls 5.
  • an upper cooling head of the inter-frame cooling 7a and after the rolling stand 11 a lower cooling head of the inter-frame cooling 7b installed.
  • an upper and a lower cooling head of the interstate cooling 7a, 7b may be arranged before and after the roll stand 11.
  • a pivoting sling roller 9 can adjust the tension in the hot strip.
  • the temperature of the hot strip before and after rolling can be changed.
  • FIG. 3 shows the rolling stand 11 from FIG. 1 in a rolling mill.
  • An unillustrated steel strip is fed in the transporting direction TR ⁇ on a roller table 12 the rolling mill 11 and rolled in the roll gap between two working rolls. 5 After hot rolling, 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.
  • Figure 4 shows a possible situation during the rolling of a di ⁇ CKEN hot strip in a groove formed as a finishing mill rolling mill 40 11.
  • the last rolling pass mill stand 11 is in the third (ie middle) instead ,
  • the thickness of the hot strip for example, is reduced from 45 mm to 20 mm.
  • the rolled finished strip leaves the middle stand 11 at a speed of, for example, 0.4 m / s.
  • Can marked with C Be rich ⁇ the finished strip through the upper and lower cooling head of the intermediate stand cooling 7a, 7b are cooled.
  • the finished strip can not be cooled.
  • the uncooled areas are marked NC.
  • the ge ⁇ rolled hot strip according to the above example 50 is required the ge ⁇ rolled hot strip according to the above example 50 s until it reaches the cooling ⁇ stretch 45. This time is already too long for certain types of steel, so that the steel strip can not achieve desired microstructure ⁇ or phase characteristics.
  • the intercooler cooling (marked C in the figure) with the upper and lower cooling heads 7a, 7b (see FIG. 1) does not change this because the cooling capacity is too low and the rolled one Hot strip on the way to the cooling section 45 is not predominantly ge ⁇ cooled.
  • FIG. 5 shows the situation in the hot rolling of a thick steel strip in a running as a finishing mill roll ⁇ road 40 with the original five rolling stands 11.
  • the mounting pieces 5a, 5b and the work rolls 5 were (see Figure 1) removed and instead, depending a scaffold cooler 20 (details see in Figures 6 to 11) per roll stand 1 installed.
  • the last roll pass takes place in the second rolling stand 11 from the left; the finished strip is intensively cooled in each of the three subsequent roll stands 1 by a scaffold 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 sophisticated tube grades) that would not be producible without scaffold cooler 20.
  • FIG. 6 shows two views of a scaffold cooler 20, namely on the left in a side view and on the right in a sectional representation.
  • the scaffold cooler 20 has an upper header 21a and a lower header 21b.
  • the underside of the upper water box 21a and the upper side of the lower water box 21b are equipped with cooling nozzles 23, so that a hot strip, not shown here in the width ⁇ direction B can be cooled.
  • seven cooling nozzles each are arranged one behind the other in the transport direction (see FIG. 6, right).
  • the water boxes 21a, 21b have lateral support straps 25, wherein said the support tabs 25 of the lower water header 21b each have a Füh ⁇ surface approximately 26th On these guide surfaces 26 of the scaffold cooler 20 can be retracted in the width direction B of the hot strip in a rolling stand, not shown here.
  • the illustrated scaffold cooler 20 is made in one piece, wherein the upper and the lower water tank 21 a, 21 b are connected to each other by uprights 27.
  • the cooling nozzles 23 are supplied with coolant by a total of four ports 22, wherein each two terminals 22 supply the upper and the lower water ⁇ serkasten 21 a, 21 b.
  • FIG. 7 additionally shows a front view of the scaffold cooler of FIG.
  • the cooling nozzles 23 are typically supplied with an overpressure of 2 to 5 bar.
  • the cooling intensity is pressure-dependent and adjustable via the overpressure of the cooling medium.
  • 8 shows a roll stand 1 with a scaffold cooler 20 in a side view on the left and a sectional view on the right.
  • the scaffold cooler 20 of FIGS. 6 and 7 is in the installed state on the two guide surfaces 26 of the lower support plates 25 on guide rails in the roll stand 1 or on the opposite guides of the chock 4b of the lower
  • FIGS. 6 and 7. Support roller on and can be on this and removed. Seen the scaffold cooler 20 is disposed between the support rollers 4, ie in line with the support rollers 4.
  • Figures 9a and 9b show a to Figures 6 and 7 alternatively ⁇ ven scaffold cooler 20 which has instead of cooling nozzles cooling slots 24th Since the steel strip 50 is not cooled differently in its width direction B or in the depth direction T of the scaffold cooler 20, it suffices if the upper and lower water boxes 21 a, 21 b each have only one connection 22.
  • the uprights 7 and the support plates 25 are as shown in FIGS. 6 and 7.
  • FIG. 10 shows a water-line plan for the coolant supply of a rolling stand 11 with a built-in scaffold cooler 20.
  • a pump 30 fed from a tank 31 represents the coolant supply.
  • the pressure of the cooling medium water is reduced by the pressure regulating valve 28 from 13 bar to 4 bar and after passing through the open switching valve 29 and the flow control valves 32 via connections the upper and supplied to lower water box 21 a, 21 b.
  • the top and bottom of a hot strip, not shown here, are cooled by cooling nozzles 23. Im installed , n
  • Switching valves 29 closed for the supply of the cooling medium to the cooling heads for the work roll cooling. From an energetic point of view, it would be better to feed the scaffold cooler 20 through a separate cooling circuit without pressure reduction by pressure control valves 28, for example directly with a pressure between 0.1 to 5 bar. This is to ty ⁇ european pressures existing low-pressure cooling systems. Alternatively, it would also be possible to connect the scaffold cooler 20 directly to the existing coolant supply of the roll stand without Druckre ⁇ reduction.
  • FIG. 11 schematically shows the installation of a scaffold cooler 20 in the roll stands 1 of a roll stand 11.
  • FIG. 12 shows a schematic section through a scaffold cooler 20 with cooling tubes 23a instead of cooling nozzles 23 (see FIG. 6, right). Cooling tubes 23a are typically operated with an overpressure between 0.1 and 1 bar, so that they can easily realize a so-called laminar cooling.
  • FIG. 14 shows an alternative scaffold cooler 20 for the scaffolding block of FIG. 7 in C-shape. Since the C-shaped scaffold ⁇ cooler 20 in the width direction B is open at one end of the scaffold cooler 20 can be easily switched on and during operation of the rolling mill in a rolling stand to be removed again.
  • the connections 22 of the upper and lower water box 21a, 21b, the cooling nozzles 23 and the guide surfaces 26 are identical to FIG. 7.
  • the scaffold cooler 20 could also have wheels for guidance on a rail.
  • the uprights 27 are arranged only at one end of the scaffold cooler, for example, the user-side end.

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

Abstract

L'invention concerne une cage de laminage (11) dans laquelle est monté, au lieu des cylindres de travail (5) et des empoises associées (5a, 5b), un refroidisseur de cage (20) pour le refroidissement d'un feuillard en acier. Le refroidisseur de cage (20) est dimensionné à cette fin de manière telle qu'il peut être monté à travers le montant de laminoir (1) côté manœuvre de la cage de laminage (11) dans la cage de laminage (11). Le refroidisseur de cage (20) comprend une boîte à eau inférieure (21b) et une boîte à eau supérieure (21a), qui présentent à chaque fois un raccord (22) pour un agent de refroidissement et plusieurs buses de refroidissement (23) ou tubes de refroidissement (23a) disposés dans la direction de la profondeur (T) du refroidisseur de cage (20) ou au moins une fente de refroidissement (24) s'étendant dans la direction de la profondeur (T) du refroidisseur de cage (20). Ainsi, les boîtes à eau inférieure et supérieure (21b, 21a) peuvent être alimentées en agent de refroidissement via le raccord respectif et le côté inférieur du feuillard en acier (50) peut être refroidi par les buses de refroidissement (23) ou les tubes de refroidissement (23a) ou la fente de refroidissement (24) de la boîte à eau inférieure (21b) et le côté supérieur du feuillard en acier (50) peut être refroidi par les buses de refroidissement (23) ou les tubes de refroidissement (23a) ou la fente de refroidissement (24) de la boîte à eau supérieure (21a).
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)

Applications Claiming Priority (2)

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

Publications (2)

Publication Number Publication Date
EP3658305A1 true EP3658305A1 (fr) 2020-06-03
EP3658305B1 EP3658305B1 (fr) 2022-06-29

Family

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EP17182794.2A Withdrawn 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
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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EP17182794.2A Withdrawn 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

Country Status (5)

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US (2) US11331704B2 (fr)
EP (2) EP3434383A1 (fr)
CN (1) CN110891702B (fr)
RU (1) RU2766925C2 (fr)
WO (1) WO2019020492A1 (fr)

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Publication number Publication date
RU2766925C2 (ru) 2022-03-16
RU2020105861A (ru) 2021-08-25
US11712725B2 (en) 2023-08-01
EP3658305B1 (fr) 2022-06-29
US20220241833A1 (en) 2022-08-04
US11331704B2 (en) 2022-05-17
CN110891702A (zh) 2020-03-17
CN110891702B (zh) 2021-10-15
US20200156130A1 (en) 2020-05-21
EP3434383A1 (fr) 2019-01-30
RU2020105861A3 (fr) 2021-11-09
WO2019020492A1 (fr) 2019-01-31

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