EP0266302B1 - Cooling aggregate and method for cooling hotrolled rolling stock with/without direct patenting in presswater - Google Patents

Cooling aggregate and method for cooling hotrolled rolling stock with/without direct patenting in presswater Download PDF

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Publication number
EP0266302B1
EP0266302B1 EP19870710010 EP87710010A EP0266302B1 EP 0266302 B1 EP0266302 B1 EP 0266302B1 EP 19870710010 EP19870710010 EP 19870710010 EP 87710010 A EP87710010 A EP 87710010A EP 0266302 B1 EP0266302 B1 EP 0266302B1
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Prior art keywords
cooling
presswater
rolling stock
pressure
chamber
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EP19870710010
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German (de)
French (fr)
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EP0266302A1 (en
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Walter Dipl.-Ing. Krenn
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Walter Dipl.-Ing. Krenn
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Priority to DE19863626741 priority Critical patent/DE3626741A1/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B45/00Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/02Devices 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
    • B21B45/0203Cooling
    • B21B45/0209Cooling devices, e.g. using gaseous coolants
    • B21B45/0215Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes
    • B21B45/0218Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes for strips, sheets, or plates
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B45/00Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/02Devices 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
    • B21B45/0203Cooling
    • B21B45/0209Cooling devices, e.g. using gaseous coolants
    • B21B45/0215Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes
    • B21B45/0224Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes for wire, rods, rounds, bars
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B1/00Metal-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
    • B21B1/16Metal-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 wire rods, bars, merchant bars, rounds wire or material of like small cross-section
    • B21B1/18Metal-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 wire rods, bars, merchant bars, rounds wire or material of like small cross-section in a continuous process
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B1/00Metal-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
    • B21B1/22Metal-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
    • B21B1/24Metal-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
    • B21B1/26Metal-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

Description

  • The invention relates, according to the preamble of claim 1, to a method with a cooling unit for cooling hot rolled rolling stock, with / without direct patenting, in which pressurized water is pressed within a pressure chamber between accumulation edges (constrictions in the pressurized water flow cross-section) onto the hot-rolled rolling stock surface; see DE-A 1 608 327. Starting from the prior art mentioned, the invention also relates to a device for carrying out the method having the features according to the preamble of claim 2.
  • When cooling hot rolled rolling stock with direct patenting, a method with a cooling unit is useful that on the one hand enables the desired cooling temperature to be reached with little use of the agents and on the other hand prevents undesired overcooling of the edge zone of the rolling stock, which can lead to the formation of undesirable structural components in the finished rolling stock.
  • For free cooling of hot rolled rolling stock, without direct patenting, a method with a cooling unit is useful, which on the one hand enables the desired cooling temperature to be reached with little use of the agent and on the other hand enables the freely selected microstructure profile in the finished rolling stock to be achieved without undesirable structural components.
  • It is known that in the production of hot wide strip steel bars up to the wire rod, the hot rolled rolling stock is predominantly cooled with water in one or at intervals, partly with water and then with Blown air or air alone. When cooling hot strip, 8000 m³ / h and more cooling water are used in the spray nozzle and laminar water cooling, on the other hand wire rod with 5.5 mm diameter, from 1000 ° to 650 °, on one wire rolling mill with 240 m³ / h and the other cooled down with 70 m³ / h cooling water. These widely differing amounts of cooling water show that with conventional cooling, a very different amount of heat is extracted from the hot rolled rolling stock per m³ of cooling water.
  • Common to all cooling of hot rolled rolling stock with water, in the case of low rolling stock thickness (rolling stock diameter), is that with the increasing rolling speeds and the increasing amounts of cooling water or the increasingly higher heat transfer values during cooling, the risk of undesired overcooling of the rolling edge zone increases. In order to avoid this danger, for example in the case of hot wide strip as well as wire rod, the cooling in the spray nozzle and laminar water cooling system is avoided at cooling temperatures at which the temperature of the rolling stock during or after the cooling is too close to that in the quality-related ZTU diagram designated, hardness structure area approaches. In addition to the metallurgical consequences, an increasingly long cooling roller table is the result in the production of hot wide strip, the length limit is reached, a higher reel temperature. In the manufacture of wire rod, which today is predominantly fanned out primarily with water and secondarily with fan air and cooled in air, the result is that the wire rod must be placed on the air cooling belt at temperatures well above the conversion point. How great the cooling problem worldwide of fast-running wire rod, a report in
    Figure imgb0001
    Stahl und Eisen ", 102, (1982) No. 12, pp. 595/99. The problem was solved with the cooling of wire rod in pressurized water within pressure-cooled tubes with narrowed tube ends from the beginning of 1983 (documents DE-A 16 08 327 and DE-A 19 25 416, and
    Figure imgb0002
    Berg- und Hüttenmännchen Jahreshefte ", 131st year (1986), volume 11, p. 418). In 1986 it was reported that the hot rolled wire rod, which was faned out on a conveyor belt and cooled with blown air, was cooled, that the structure in each individual turn of the wire rod bundle is four times uneven, since from each turn the two sections lying in the area of the center of the conveyor belt cool faster than the sections lying on the two outer sides (
    Figure imgb0003
    Stahl und Eisen ", 106, (1986) No. 7, pp. 313/16). In order to avoid or reduce the negative effect of this cooling of the fan-out windings in the fan air, the cooling in pressurized water should be brought to a temperature below the transition point can, without getting unwanted structural components in the wire rod, so that cooling with blown air can be completely or largely eliminated.
  • There is currently no known or accessible publication describing in detail the phenomena when the heat is extracted from shaped, hot, continuous production goods made of steel or metal, in a pressure chamber by pressurized water; On the basis of measuring records, different processes for extracting the heat from a hot rolled rolling stock in pressurized water are described within cooling units of different lengths with only one pressure space between the accumulation edges at the ends of the cooling unit and different amounts of pressurized water.
  • 5 to 8 are shown for the measurement record at the cooling temperature, the measurement records of the pressure in the pressurized water line and that of the pressurized water quantities, and the symbol for the pressure chamber length. The numbers for the length of the pressure chamber and the amount of pressure water are ratio numbers.
  • The measuring records in Fig. 5 and Fig. 7 document that with a pressure chamber length 1 or 3 and a constant amount of pressurized water 3 or 10, the heat removal in itself became unstable, since the pressure chamber volume, based on the amount of pressurized water used , was too high and the cooling temperature dropped from 860 ° or 780 ° over the rolling stock run time in sowing steps to 720 ° or 660 °, whereas in the measuring records in Fig. 6 and Fig. 8 (in the area of constant water pressure ) as stable and constant. 5 and 7, the heat withdrawal increased in seconds oscillating to full evaporation, in which the steam pressure made the pressure chamber free of pressurized water for seconds until just as quickly pressurized water flowed in again and the process was repeated at an ever higher heat transfer value level, whereby the cooling temperature has dropped in a self-propelled manner so that the finished rolled product could not have a uniform structure over the length.
  • The invention is based on the object of being able to carry out the cooling of hot rolled rolling stock, from hot wide strip to wire rod, with / without direct patenting, in pressurized water in such a way that during and after the cooling thus carried out, no detectable undesirable, quality-dependent, cooling-related structural components form in the finished rolling stock can and the use of funds is comparatively low.
  • The object is achieved with a method containing the method steps of claim 1 in that the cooling unit is pressurized with the amount of pressurized water that is necessary for the cooling unit, preferably in equilibrium with the amount of heat to be removed from the rolling stock, so that the heat is removed by heating of the pressurized water in the pressure chamber of the convection cooling part, in the convection pressure chamber, and the removal of heat by the evaporation heat given off to the pressurized water / steam mixture in the pressure chamber of the evaporative cooling part, in the evaporation pressure chamber, preferably up to the boiling point of the pressurized water, to the desired cooling temperature of the rolling stock is and the cooling in the pressurized water and in the pressurized water-steam mixture is carried out in such a way that, during and after the cooling thus carried out, no detectable undesirable quality-dependent structural constituents, which are detectable in the finished rolling stock, form en and with a device having the features of claim 2, characterized in that the cooling unit consists primarily of the pressure chamber of the convection cooling part, the convection pressure chamber, in which the hot rolled rolling stock, primarily by convection, from the pressurized water heat pressed onto the hot rolling surface, is preferably withdrawn to the boiling point of the pressurized water, and secondarily from the pressure chamber of the evaporative cooling part, the evaporative pressure chamber, in which the rolling stock, primarily due to the heat of evaporation, of the pressurized water-steam mixture pressed onto the rolling stock surface and generated in the convection pressure chamber , further heat is extracted.
  • Include further training of the cooling unit
    • that the volume of the convection pressure chamber is dimensioned such that when the rolling stock passes through, the remaining part of its volume is sufficient for the quantity of pressurized water determined for cooling the intended amount of rolled material, that from the pressurized water line, via the pressurized water valve and the pressurized water inflow control valve, flows through the preferably central inflow openings into the convection pressure chamber, extracting as much heat from the wire rod as is necessary to heat the pressurized water to a temperature determined by quality,
    • that the accumulation edges between the convection pressure chamber and the evaporation pressure are dimensioned such that when the rolling stock passes through, the remaining flow cross-section is sufficient for the quantity of pressurized water / steam mixture produced in the convection pressure chamber to flow into the evaporation pressure chamber and therein Rolled stock cools down due to the heat removal that the pressurized water / steam mixture extracts from the rolled stock as heat of vaporization,
    • that the flow cross-section in the accumulation edge at the rolling stock entry and exit, based on the remaining flow cross-section when rolling stock is in transit, is equal in its dimension from the rolling stock surface to the accumulation edge or is 10 to 30% larger or smaller than the same dimension for that of the remaining flow cross-sections in the accumulation edges within the cooling unit, which means that the cooling intensity of the cooling unit can be adapted to the needs of the different quality groups and cooling temperatures of the rolling stock to be cooled,
    • that the cooling unit body is divided into a lower part and an upper part and both parts preferably have a labyrinth seal on the side and the upper part is variable and non-positively guided,
    • that the cooling unit body is undivided,
    • that are arranged in the convection pressure chamber and / or in the evaporation pressure chamber turbulence enhancer and / or flow mode,
      that the convection pressure space is preferably arranged between two evaporation pressure spaces, all of which have the same or different lengths,
    • that the convection pressure chamber is arranged after or before the evaporation pressure chamber,
    • that the pressurized water valve and the pressurized water inflow control valve are combined in one,
    • that the regulation of the cooling intensity during the passage of the rolling stock with the pressurized water inflow control valve takes place by changing the amount of pressurized water,
    • that the regulation of the cooling intensity during the passage of the rolling stock, in the case of a divided cooling unit body, also takes place via distance-variable, non-positive guidance of the upper part,
    • that when the width of the rolling stock changes, in the convection pressure space, possibly also in the evaporation pressure space, the sides of the variable-variable retention edges are arranged on the sides,
    • that in the case of a divided cooling unit body, the cooling unit can be steplessly guided from the open spray water cooling to the closed pressure water cooling, from its open state to that of the moving together of the upper part onto the lower part and the pressurized water which is thereby switched on,
    • that fine sands, e.g. lubricating gels, are added to the pressurized water,
    • that chemically active additives are added to the pressurized water, e.g. to support a certain scale formation, for neutralization,
    • that air is added to the pressurized water,
    • that two or more cooling units are each connected to a connecting piece in order to avoid air access during cooling in pressurized water,
    • that the cooling unit is connected to a water and condensation box, itself has or is in one, which is preferably equipped with showers and, if appropriate, carries a pressure water / steam mixture retaining element each on the rolling stock inlet and outlet side and has drain openings has and
    • that the cooling unit with its firmly connected water and condensation box is preferably arranged twice and in parallel, alternately one or the other cooling unit is moved out of and into the rolling stock line in a very short time by simple mechanics.
  • The advantages achieved with the method according to the invention with a cooling unit consist in particular in
    • that the hot rolled rolling stock is cooled in pressurized water, so that only a comparatively small amount of pressurized water is required,
    • that during and after the cooling thus carried out, with / without direct patenting, no detectable, undesirable, quality-dependent, cooling-related structural components can form in the structure of the finished rolling stock,
    • that this physically safe cooling of hot rolled rolling stock in the production flow enables direct patenting in pressurized water for a large part of the rolling stock qualities, on the other hand allows direct patenting to a large extent even before the subsequent direct patenting in blown air and also enables any free cooling to achieve the different surface structure designs ,
    • that with the addition of suitable substances to the pressurized water it is possible to additionally treat the surface of the rolling stock physically and / or chemically during cooling,
    • that the process can be carried out and the cooling unit can be set such that more than 50% -80% pressurized water is saved compared to the conventionally used cooling devices and cooling processes.
  • If the pressure chamber according to FIG. 6 were a convection pressure chamber between two evaporation pressure chambers and the effective heat transfer value therein with a magnitude of 100,450 kJ / m².h. ° C was equal to that in the convection pressure chamber, the cooled rolling stock would have a cooling temperature in the order of magnitude Get 350 ° C, you would not reduce the amount of pressurized water.
  • Fig. 9 shows the well-known diagram of the dependency of the heat flow density and heat transfer coefficient on the temperature difference between the heating surface and the water at the pressure of 1 bar, which is used as a representation aid, although the pressure of the pressurized water is higher in the cooling unit according to the invention, the attached α values are on the CE line.
  • Fig. 10 shows the process of heat removal with evaporation in a simplified schematic representation. The horizontally hatched area should schematically represent the proportion of pressurized water and the dotted area the proportion of steam. The left side should represent the pressurized water-steam mixture ratio when the pressurized water quantity is 1-, the right side with one of 1+.
  • The mathematical determination of the exact amount of pressurized water for the cooling of the different rolling stock qualities and dimensions to the different cooling temperatures is due to the large number of known and unknown imponderables effective (such as the scale thickness, adhesion and coverage% per cm² of rolling stock surface) hardly possible, whereas it is easy to determine the amount of pressurized water at the individual cooling temperatures by measuring runs, which experience has shown that it can be carried out in the production run, since the main values can be measured in the simplest qualities. Of the comparatively small amount of pressurized water, about 80% should flow into the cooling unit as the base load amount via the pressurized water valve and the remaining amount of 20% via the controllable pressurized water inflow valve, which makes it possible for the amount of pressurized water currently required to flow in, to bring the actual cooling temperature currently present to the target cooling temperature is reached in a very short time, so that the target cooling temperature can be operated with a minimal bandwidth.
  • Two exemplary embodiments of the cooling unit and method according to the invention are shown schematically in the drawing and are described in more detail below.
  • 1 and 2 show an embodiment of a cooling unit for cooling wide flat rolled stock, e.g. Hot wide strip.
  • The cooling unit consists primarily of the pressure chamber of the convection cooling part, the convection pressure chamber (1), with the storage edges (7) and (8) and secondarily from the pressure chamber of the evaporative cooling part, the evaporation pressure chamber (2), with the storage edges (9) and (10), plus the pressurized water line (3), the pressurized water valve (4), the pressurized water inflow control valve (5), the inflows (6), the lower part of the cooling unit (11), the upper part of the cooling unit (12), a seal (13) and the turbulence enhancer (15) Flow indicator (16), the laterally variable storage edges (17), the water and condensation box (19), plus the showers (20), the pressurized water / steam mixture retaining elements (21) and the water and condensate drains (22).
  • The pressurized water flows from the pressurized water line (3), via the pressurized water valve (4) with approx. 80% and via the pressurized water inflow control valve (5) with approx. 20%, through the inflows (6) into the convection pressure chamber (1), is warmed up to the boiling point by the continuous, warm-rolled rolling stock, the pressurized water-steam mixture generated flows over the accumulation edges (7) and ( 8) into the evaporation pressure chambers (2), then cools the hot rolled rolling stock by removing heat, which the pressurized water-steam mixture extracts from the rolling stock as evaporation heat, and leaves the cooling unit through the accumulation edges (9) and (10).
  • The damming edges (7) and (8) are arranged to make it difficult for the pressurized water to leave the convection pressure chamber (1) and to separate the process of heat removal in the two pressure rooms (1) and (2) so that the physical possibility is created to keep the extraction of heat from the hot rolled material stable by convection and evaporation (bubble and film boiling) and to be able to use it as optimally as possible.
  • The steam portion of the pressurized water / steam mixture flowing out through the accumulation edges (9) and (10) is condensed on the underside between the roller table rollers with showers (20) for wide flat rolled stock and on the top by means of the pressurized water / steam mixture retaining elements (21 ), e.g. in the form of movable flaps, led into the water and condensation box (19) in the upper part (12) and condensed there with showers (20). Water and condensate flow out through the opening (22).
  • 3 and 4 show an embodiment of a cooling unit for cooling section steel, e.g. I-, L-profiles, reinforcement steel, wire rod.
  • The cooling unit for this consists in the main parts of the same parts as described for the cooling unit for wide flat rolled stock, with reference to FIGS. 1 and 2. The cooling unit body, however, is preferably in one piece (14), so that the pressurized water / steam mixture emerging from the accumulation edges (9) and (10) flows directly into the water and condensation box (19).
  • In Fig. 4, a connector (18) is shown, with which two or more cooling units can be connected if no air should be able to reach the surface of the rolling stock during cooling in the pressurized water.
  • Fig. 11 shows the cooling lines during the cooling of a wire rod with a diameter of 5.5 mm, at a final rolling speed of 80 m / s and an amount of pressurized water of 20 m³ / h.
    • 5 with only one pressure chamber with length 1, in which the heat removal per dm³ of pressurized water is 83 kcal and the wire rod cools down to 795 ° C. and
    • in a cooling unit, analogous to Fig. 10, with a convection pressure chamber with a length of 1 and two subsequent evaporation pressure rooms with a length of 0.5, in which the heat removal per dm³ of pressurized water is 828.729 kJ and the wire rod to 506 ° C cools down, a temperature that is already lower than that used for concrete reinforcement steels with a heat-treated surface. The cooling unit equipped with three pressure rooms cools the wire rod with approx. 7.5 m³ / h at 795 ° C - that's approx. 60% savings in pressurized water, which particularly proves the economic viability of the cooling unit and method according to the invention.

Claims (21)

  1. Method for cooling hot-rolled rolling stock, with/without direct patenting in presswater, at which presswater within a pressure-chamber (1) between constrictions (7 and 8) is pressed to the hot-rolled surface of the rolling stock
    characterized in
    that the cooling-apparatus is filled with a quantity of presswater, which is preferably in balance with the heat to be abstracted, in order to achieve the desired cooling temperature of the rolled product through the heat abstraction by heating of the presswater in the pressure-chamber of a convection-cooling-part and the heat abstraction through the evaporation heat released to a presswater-steam-mixture in the pressure-chamber of an evaporation-cooling-part (2), preferably up to the boiling point of the presswater, and while doing so the cooling rate in the presswater and the presswater-steam-mixture is controllable.
  2. Cooling-apparatus for the performance of the method according to claim 1 for the cooling of hot-rolled rolling stock, with/without direct patenting, at which presswater is pressed within a pressure-chamber (1) between the constrictions (7 and 8) to the hot-rolled surface of the rolling stock,
    characterized in
    that the cooling-apparatus (1) consists of the pressure-chamber of a convection-cooling-part, the convection-pressure-part (1) between the constrictions (3 and 8), in which heat is abstracted from the hot-rolled rolling stock, in particular by convection, by the inflowing presswater, which is pressed down on to the hot-rolled surface of the rolling stock, preferably up to the boiling point of the presswater, and out of the pressure-chamber of an evaporation-cooling-part, the evaporation-pressure-chamber (2) between the constrictions (7, 9; 8, 10), in which further heat from the rolling stock in particular by the evaporation heat is abstracted by the inflowing mixture of water and steam, which is pressed on to the surface of the rolling and which is produced in the convection-pressure-chamber.
  3. Cooling-apparatus according to claim 2,
    characterized in
    that the volume of the convection-pressure-chamber (1) is designed such so that its remaining volume, when a rolling stock is passing through, is sufficient so that the quantity of presswater, determined for the cooling of the designated quantity of rolling stock, which is flowing in from a presswater-pipe through a presswater-valve (4) and a presswater-inflow-control-valve (5) through the preferably centrically provided inlet (6) into the convection-pressure-chamber, can abstract from the rolling stock so much heat as is necessary, to heat the presswater to a quality-determined fixed temperature.
  4. Cooling-apparatus according to claim 2 and 3,
    characterized in
    that the constrictions (7 and 8) between the convection-pressure-chamber (1) and the evaporation-pressure-chamber (2) are designed in such a way that during passing through of rolling stock the remaining flow-through-cross-section is sufficient that the quantity of presswater-steam-mixture, developed in the convection-pressure-chamber, flows into the evaporation-pressure-chamber and cools therein the rolling stock through the heat abstraction, which the presswater-steam-mixture as evaporation heat abstracts from the rolling stock.
  5. Cooling-apparatus according to claim 2 through 4,
    characterized in
    that the flow-through-cross-section in the constrictions at the entrance point of the rolling stock (9) and the exit point of the rolling stock (10) in relation to the remaining cross-section during moving through of rolling stock in its size from the rolling stock's surface up to the constrictions (9) and (10) is equal or 10% to 30% bigger or smaller than the same size at the remaining flow-through-cross-sections in the constrictions (7) and (8) within the cooling-apparatus, whereby it is achieved that the cooling intensity of the cooling-apparatus can be adapted to the necessities of the different quality groups and cooling temperatures of the rolling stock to be cooled.
  6. Cooling-apparatus according to claim 2 through 5,
    characterized in
    that the cooling-apparatus is divided into a lower part (11) and an upper part (12) and both parts are provided with a seal at the side (13) and the upper part is directed at variable distances and in a fixed pattern [kraftschlüßig].
  7. Cooling-apparatus according to claim 2 through 6,
    characterized in
    that the body of the cooling-apparatus is designed in an undivided manner (14).
  8. Cooling-apparatus according to claim 2 through 7,
    characterized in
    that in the convection-pressure-chamber (1) and/or in the evaporation-pressure-chamber (2) turbulence-increasers (15) and/or flow-directing-devices (16) are located.
  9. Cooling-apparatus according to claim 2 through 8,
    characterized in
    that the convection-pressure-chamber (1) is located between two evaporation-pressure-chambers (2), which all have the same or different length.
  10. Cooling-apparatus according to claim 2 through 9,
    characterized in
    that the convection-pressure-chamber (1) is located behind or in front of the evaporation-pressure-chamber (2).
  11. Cooling-apparatus according to claim 2 through 10,
    characterized in
    that the presswater-valve (4) and the presswater-inflow-control-valve (5) are combined in one (5).
  12. Cooling-apparatus according to claim 2 through 11,
    characterized in
    that the control of the cooling intensity in the course of passing through of rolling stock is made with the presswater-inflow-control-valve (5) by alteration of the quantity of the presswater.
  13. Cooling-apparatus according to claim 2 through 12,
    characterized in
    that the adjustment of the intensity of the cooling in the course of passing through of rolling stock, with divided cooling-aggregate-bodies (11, 12), also is made through the control of the upper part at variable distances and in a fixed pattern [kraftschlüßig] (12).
  14. Cooling-apparatus according to claim 2 through 13,
    characterized in
    that with variation of the width of the rolling stock in the convection-pressure-chamber (1), and if necessary as well in the evaporation-pressure-chamber (2), lateral-variable, fixable constrictions (17) are located on both sides.
  15. Cooling-apparatus according to claim 2 through 14,
    characterized in
    that with divided cooling-apparatus-bodies (11, 12) the cooling-apparatus from its opened status until the lowering of the upper part (12) to the lower part (11) and the hereby admitted presswater is continuously adjustable from the open spray-water-cooling to the closed presswater-cooling.
  16. Cooling-apparatus according to claim 2 through 15,
    characterized in
    that fine sands, i.e. abrasive sands, are added to the presswater.
  17. Cooling-apparatus according to claim 2 through 16,
    characterized in
    that chemical additives, for example for support of the development of a special scale, for neutralization are added to the presswater.
  18. Cooling-apparatus according to claim 2 through 17,
    characterized in
    that air is added to the presswater.
  19. Cooling-apparatus according to claim 2 through 18,
    characterized in
    that for avoidance of air admission during the cooling in presswater two or more cooling apparatus are linked by a connecting piece (18) each.
  20. Cooling-apparatus according to claim 2 through 19,
    characterized in
    that the cooling-apparatus is connected to a water-box or condensation-box (19), has one itself or is arranged within one, which preferably is equipped with sprinklers (22) and which has, if necessary, at both the rolling stock's entrance side and the rolling stock's outlet side a presswater-steam-retaining-device (21) assembled and has outflow outlets (22).
  21. Cooling-apparatus according to claim 2 through 19,
    characterized in
    that the cooling-apparatus with its firmly attached water- and condensation-box is arranged preferably double and parallel, whereby alternatively the one or the other cooling-apparatus by simple mechanical movement, is pushed out or into the rolling line in the shortest time.
EP19870710010 1986-08-07 1987-08-07 Cooling aggregate and method for cooling hotrolled rolling stock with/without direct patenting in presswater Expired - Lifetime EP0266302B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE19863626741 DE3626741A1 (en) 1986-08-07 1986-08-07 Cooling unit and method for cooling warm rolling, with / without direct patenting, in pressure cooling water
DE3626741 1986-08-07

Publications (2)

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EP0266302A1 EP0266302A1 (en) 1988-05-04
EP0266302B1 true EP0266302B1 (en) 1993-09-29

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EP19870710010 Expired - Lifetime EP0266302B1 (en) 1986-08-07 1987-08-07 Cooling aggregate and method for cooling hotrolled rolling stock with/without direct patenting in presswater

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EP (1) EP0266302B1 (en)
AT (1) AT390273B (en)
DE (1) DE3626741A1 (en)
ES (1) ES2046213T3 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19718530A1 (en) * 1997-05-02 1998-11-12 Schloemann Siemag Ag Process and cooling unit for cooling hot rolled rolling stock, in particular hot wide strip

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3708128A1 (en) * 1987-03-13 1988-09-22 Krenn Walter Process and pressure cooling unit for leaded cooling shaped, heavy to light, hot, continuous products of steel and metal in pressure water
DE4009228A1 (en) * 1990-03-22 1991-09-26 Krenn Walter Differential cooling system for profiled metal prods. e.g. rails - has controlled flows of pressurised water, some mixed with air, directed at different parts of prod.
DE4201295A1 (en) * 1992-01-15 1993-07-22 Thaelmann Schwermaschbau Veb Device for guiding and cooling rolled material in wire rolling blocks - uses pressure water feed arranged on guide by flanges, water quantity is adjusted by diaphragm in feed nozzle
DE19850739A1 (en) * 1998-11-04 2000-05-11 Schloemann Siemag Ag Method and device for cooling hot rolled material, in particular hot wide strip
CN104550275B (en) * 2014-12-26 2016-07-06 钢铁研究总院 A kind of spray vaporization chiller for hot-rolled high-strength reinforcing bar and method

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1925416C3 (en) * 1968-03-12 1979-08-02 Walter 4330 Muelheim Krenn
DE3043117A1 (en) * 1968-03-12 1982-07-01 Walter Krenn Rolled prod. cooling line - comprising cooling pipes of cross=section similar to prod. cross=section
DE1608327C3 (en) * 1968-03-12 1973-10-31 Walter 4330 Muelheim Krenn
DD110774A1 (en) * 1974-04-10 1975-01-12
JPS5711930B2 (en) * 1976-08-31 1982-03-08

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19718530A1 (en) * 1997-05-02 1998-11-12 Schloemann Siemag Ag Process and cooling unit for cooling hot rolled rolling stock, in particular hot wide strip
DE19718530B4 (en) * 1997-05-02 2005-02-03 Sms Demag Ag Process for cooling of rolling-cold rolling stock and apparatus for carrying out the method and use of the apparatus

Also Published As

Publication number Publication date
ES2046213T3 (en) 1994-02-01
EP0266302A1 (en) 1988-05-04
AT390273B (en) 1990-04-10
ATA192987A (en) 1989-09-15
DE3626741A1 (en) 1988-02-18

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