EP0266302A1 - Agrégat de refroidissement et procédé pour refroidir des matières à laminer à chaud avec/sans patentage directe à pression hydraulique - Google Patents

Agrégat de refroidissement et procédé pour refroidir des matières à laminer à chaud avec/sans patentage directe à pression hydraulique Download PDF

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Publication number
EP0266302A1
EP0266302A1 EP87710010A EP87710010A EP0266302A1 EP 0266302 A1 EP0266302 A1 EP 0266302A1 EP 87710010 A EP87710010 A EP 87710010A EP 87710010 A EP87710010 A EP 87710010A EP 0266302 A1 EP0266302 A1 EP 0266302A1
Authority
EP
European Patent Office
Prior art keywords
cooling
cooling unit
rolling stock
pressurized water
pressure chamber
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
EP87710010A
Other languages
German (de)
English (en)
Other versions
EP0266302B1 (fr
Inventor
Walter Dipl.-Ing. Krenn
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.)
KRENN, WALTER, DIPL.-ING.
Original Assignee
SMS Schloemann Siemag AG
Schloemann Siemag AG
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 SMS Schloemann Siemag AG, Schloemann Siemag AG filed Critical SMS Schloemann Siemag AG
Publication of EP0266302A1 publication Critical patent/EP0266302A1/fr
Application granted granted Critical
Publication of EP0266302B1 publication Critical patent/EP0266302B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • B21B45/0224—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes for wire, rods, rounds, bars
    • 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
    • B21B1/16—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 wire rods, bars, merchant bars, rounds wire or material of like small cross-section
    • B21B1/18—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 wire rods, bars, merchant bars, rounds wire or material of like small cross-section in a continuous process
    • 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

Definitions

  • the invention relates to a cooling unit and a method for cooling hot rolled rolling stock, with / without direct patenting, in which pressurized water is pressed onto the hot rolled rolling stock surface.
  • a cooling unit and process are useful that on the one hand enable the desired cooling temperature to be reached with little use of the agents and on the other hand prevent 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.
  • a cooling unit and method are useful which, on the one hand, enable the desired cooling temperature to be achieved with little use of the agent and, on the other hand, enable the freely selected microstructure profile in the finished rolling stock to be achieved without undesirable structural components.
  • No publication is known or accessible to the invention, which describes 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, in detail; Using measuring records, he describes the different processes involved in extracting the heat from a hot rolled rolling stock in pressurized water 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 heat withdrawal increased in seconds to full evaporation, in which the steam pressure made the pressure chamber free of pressurized water for seconds until pressurized water flowed in again just as quickly 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 cooling unit consists primarily of the pressure chamber of the convection cooling part, the convection pressure chamber, in the hot rolled rolling stock, primarily by convection, from the pressurized water heat pressed onto the warm rolling stock surface, preferably up to the boiling point of the pressurized water, is withdrawn and secondarily from the pressure chamber of the evaporative cooling part, the evaporative pressure chamber, in which further heat is removed from the rolling stock, primarily by the heat of evaporation, from the pressurized water-steam mixture pressed onto the rolling stock surface and generated in the convection pressure chamber, and that In terms of process, the cooling unit is preferably pressurized with the amount of pressurized water which, due to the cooling unit, is in equilibrium with the amount of heat to be extracted from the rolling stock and is necessary so that the heat is removed by heating the pressurized water in the convection pressure chamber and the heat is removed by the pressure water steam Mixture released Evaporation heat in the evaporation pressure chamber, the desired cooling temperature of
  • 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 an order of magnitude of 24,000 kcal / m 3 , h. ° C was equal to that in the convection pressure chamber, the cooled rolling stock would be of the order of magnitude Cooling temperature around 350 ° C, you would not reduce the amount of pressurized water.
  • 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+.
  • FIG. 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 section, the convection pressure chamber (1), with the accumulation edges (7) and (8) and secondarily from the pressure chamber of the evaporative cooling section, the evaporation pressure chamber (2), with the accumulation 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 (1), 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 heated to the boiling point by the continuous, low-rolling rolling stock, the pressurized water / steam mixture generated flows over the accumulation edges (7) and ( 8) into the evaporation pressure chamber (2), then cools - then 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 drain through the opening (22).
  • FIG. 3 and 4 show an embodiment of a cooling unit for cooling section steel, e.g. I-, L-profiles, reinforcement steel, wire rod.
  • 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 is, however, preferably in one piece (14), as a result of which the pressurized water / steam mixture emerging from the storage edges (9) and (10) flows directly into the water and condensation box (19).
  • a connecting piece (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.
EP87710010A 1986-08-07 1987-08-07 Agrégat de refroidissement et procédé pour refroidir des matières à laminer à chaud avec/sans patentage directe à pression hydraulique Expired - Lifetime EP0266302B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863626741 DE3626741A1 (de) 1986-08-07 1986-08-07 Kuehlaggregat und verfahren zum abkuehlen walzwarmen walzguts, mit/ohne direktpatentieren, in druckkuehlwasser
DE3626741 1986-08-07

Publications (2)

Publication Number Publication Date
EP0266302A1 true EP0266302A1 (fr) 1988-05-04
EP0266302B1 EP0266302B1 (fr) 1993-09-29

Family

ID=6306869

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87710010A Expired - Lifetime EP0266302B1 (fr) 1986-08-07 1987-08-07 Agrégat de refroidissement et procédé pour refroidir des matières à laminer à chaud avec/sans patentage directe à pression hydraulique

Country Status (4)

Country Link
EP (1) EP0266302B1 (fr)
AT (1) AT390273B (fr)
DE (2) DE3626741A1 (fr)
ES (1) ES2046213T3 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0875304A2 (fr) * 1997-05-02 1998-11-04 Sms Schloemann-Siemag Aktiengesellschaft Procédé et agrégat de refroidissement pour refroidir des produits de laminage chauds, notamment des bandes larges laminées à chaud
CN104550275A (zh) * 2014-12-26 2015-04-29 钢铁研究总院 一种用于热轧高强度钢筋的水雾汽化冷却装置及方法

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3708128A1 (de) * 1987-03-13 1988-09-22 Krenn Walter Verfahren und druckkuehlaggregat zum gefuehrten abkuehlen geformten, schweren bis leichten, heissen, durchlaufenden produktionsguts aus stahl und metall in druckwasser
DE4009228A1 (de) * 1990-03-22 1991-09-26 Krenn Walter Verfahren und druckkuehlaggregat zum gleichzeitig unterschiedlichen abkuehlen ausgewaehlter bereiche durchlaufenden produktionsguts, mit flach- oder profilquerschnitt, aus stahl und anderem
DE4201295A1 (de) * 1992-01-15 1993-07-22 Thaelmann Schwermaschbau Veb Vorrichtung zum fuehren und kuehlen von walzgut in drahtwalzbloecken
DE19850739A1 (de) * 1998-11-04 2000-05-11 Schloemann Siemag Ag Verfahren und Vorrichtung zum Kühlen von walzwarmem Walzgut, insbesondere Warmbreitband

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1925416A1 (de) * 1968-03-12 1970-11-26 Walter Krenn Kuehlstrecke fuer Walzdraht od.dgl.
DE1608327A1 (de) * 1968-03-12 1970-12-10 Walter Krenn Kuehlstrecke fuer Walzdraht od.dgl.
DE2440415A1 (de) * 1974-04-10 1975-10-23 Qualitaets Und Edelstahl Kom V Verfahren und vorrichtung zur gesteuerten abkuehlung von walzgut, insbesondere von stabmaterial
US4136544A (en) * 1976-08-31 1979-01-30 Showa Electric Wire & Cable Co., Ltd. Cooling tubes for wire stocks
DE3043117A1 (de) * 1968-03-12 1982-07-01 Walter 4330 Mülheim Krenn Kuehlstrecke fuer walzdraht oder stabmaterial

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1925416A1 (de) * 1968-03-12 1970-11-26 Walter Krenn Kuehlstrecke fuer Walzdraht od.dgl.
DE1608327A1 (de) * 1968-03-12 1970-12-10 Walter Krenn Kuehlstrecke fuer Walzdraht od.dgl.
DE3043117A1 (de) * 1968-03-12 1982-07-01 Walter 4330 Mülheim Krenn Kuehlstrecke fuer walzdraht oder stabmaterial
DE2440415A1 (de) * 1974-04-10 1975-10-23 Qualitaets Und Edelstahl Kom V Verfahren und vorrichtung zur gesteuerten abkuehlung von walzgut, insbesondere von stabmaterial
US4136544A (en) * 1976-08-31 1979-01-30 Showa Electric Wire & Cable Co., Ltd. Cooling tubes for wire stocks

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0875304A2 (fr) * 1997-05-02 1998-11-04 Sms Schloemann-Siemag Aktiengesellschaft Procédé et agrégat de refroidissement pour refroidir des produits de laminage chauds, notamment des bandes larges laminées à chaud
EP0875304A3 (fr) * 1997-05-02 2002-01-02 SMS Demag AG Procédé et agrégat de refroidissement pour refroidir des produits de laminage chauds, notamment des bandes larges laminées à chaud
CN104550275A (zh) * 2014-12-26 2015-04-29 钢铁研究总院 一种用于热轧高强度钢筋的水雾汽化冷却装置及方法
CN104550275B (zh) * 2014-12-26 2016-07-06 钢铁研究总院 一种用于热轧高强度钢筋的水雾汽化冷却装置及方法

Also Published As

Publication number Publication date
EP0266302B1 (fr) 1993-09-29
ATA192987A (de) 1989-09-15
AT390273B (de) 1990-04-10
DE3787612D1 (de) 1993-11-04
ES2046213T3 (es) 1994-02-01
DE3626741A1 (de) 1988-02-18

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