EP0260246A2 - Einrichtung zum kontinuierlichen Kühlen von Walzprodukten - Google Patents

Einrichtung zum kontinuierlichen Kühlen von Walzprodukten Download PDF

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Publication number
EP0260246A2
EP0260246A2 EP87870122A EP87870122A EP0260246A2 EP 0260246 A2 EP0260246 A2 EP 0260246A2 EP 87870122 A EP87870122 A EP 87870122A EP 87870122 A EP87870122 A EP 87870122A EP 0260246 A2 EP0260246 A2 EP 0260246A2
Authority
EP
European Patent Office
Prior art keywords
tank
tubular elements
installation
aqueous
cooling
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.)
Withdrawn
Application number
EP87870122A
Other languages
English (en)
French (fr)
Other versions
EP0260246A3 (de
Inventor
Marios Economopoulos
Pierre Simon
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.)
Centre de Recherches Metallurgiques CRM ASBL
Original Assignee
Centre de Recherches Metallurgiques CRM ASBL
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 Centre de Recherches Metallurgiques CRM ASBL filed Critical Centre de Recherches Metallurgiques CRM ASBL
Publication of EP0260246A2 publication Critical patent/EP0260246A2/de
Publication of EP0260246A3 publication Critical patent/EP0260246A3/de
Withdrawn legal-status Critical Current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
    • B21B45/0224—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes for wire, rods, rounds, bars

Definitions

  • the present invention relates to an installation for continuously cooling rolled metal products, such as steel bars emerging from the finishing stands of a hot rolling mill.
  • Sudden surface cooling is currently carried out by passing the bar through an aqueous medium, and the process is carefully carried out and controlled in order to supply with certainty products having the desired properties.
  • the installations currently used include, in addition to the actual cooling equipment with its supply and control systems, a first basin for collecting cooling water and a second basin with a cooling tower for cooling. some water.
  • the whole is completed by a set of pumps, filters, valves and pipes, dimensioned so as to be able to ensure high water flow rates, of the order of 4 to 8 m3 per tonne of steel treated.
  • the present invention relates to an installation intended to remedy the aforementioned drawbacks.
  • the invention proposes a compact installation, allowing a significant reduction in the work on the site of implantation, the occupied surface area and the investment costs. It also allows better control of the process and it lends itself to the realization of "turnkey" installations.
  • the capture means comprise at least one fan ensuring a controlled extraction of the vapor released by the aqueous medium which is in the tank.
  • the fan provides forced suction of air through the "water mist” formed in the tank, so as to evaporate part of the water and therefore cool the remaining water.
  • the means for supplying said tubular elements in an aqueous medium comprise a pump connected to said tank, as well as at least one pipe putting said pump in hydraulic communication with an essentially horizontal channel arranged parallel to said tubular elements with which it communicates through conduits.
  • said pump is advantageously arranged inside the tank, preferably near the bottom of the latter.
  • the channel is advantageously located under the tubular elements, with which it communicates by vertical conduits.
  • the successive tubular elements are spaced, in the axial direction, by a distance of the order of 20 mm.
  • the entire installation comprising the tank, the plurality of tubular elements with their supply means, and the collection means is housed in a common enclosure communicating with the fan and provided with a inlet opening and an outlet opening for the product to be cooled, these two openings being centered on the longitudinal axis of the aligned tubular elements.
  • the tank and / or the capture means can themselves constitute parts of said common enclosure.
  • the installation can be mounted immediately at the outlet of the last stand of the hot rolling mill, so that the common longitudinal axis of the aligned tubular elements coincides with the outlet axis of the products. out of said last rolling stand.
  • the installation in accordance with the invention is equipped with appropriate means for measuring and adjusting various parameters characteristic of the process, in particular the flow rate and the temperature of the aqueous medium for cooling the product.
  • a steel bar 1 from a hot rolling mill enters a cooling ramp 2, known per se, where it undergoes the sudden surface cooling of the treatment recalled in the introduction .
  • the cooling water evacuated from the ramp 2 is collected in a collection basin 3 from where it is sent, by a pump 4, to a cooling basin 5 equipped with a cooling tower 6.
  • a possible excess of water in the cooling basin 5 is returned by a conventional overflow to the collecting basin 3.
  • the water cooled in the cooling basin 5 is taken up by a pump 7 at high pressure and is returned through filters 8 and devices for measuring and regulating the flow 9, to the supply of the cooling ramp 2.
  • the cooling tank 5 is provided with a supply of fresh water 10, intended in particular to compensate for the losses by evaporation in the cooling tower 6 and to adjust the temperature of the water sent to the cooling ramp 2.
  • FIG. 2 shows schematically the essential characteristics of a compact installation according to the present invention.
  • the cooling ramp 11, the water cooling system 12 and the water circulation equipment 13 are assembled in a single assembly.
  • This assembly can be grouped in a common enclosure and thus constitute a cooling group 14 available "key on door".
  • the water cooling system 12 is connected on the one hand to a fan 15 which extracts the heat in the form of steam and to a make-up water supply 16 which compensates for the water losses due to evaporation and eventual leaks tuelles.
  • the apparatus 13 essentially comprises a variable speed pump.
  • the make-up water flow rate is regulated by an apparatus 17, while the flow rate of the variable speed pump is controlled by conventional measurement and adjustment instruments 18.
  • FIG 3 there is shown a cooling unit 14 meeting the principles set out in Figure 2, installed immediately at the outlet of the last stand 20 of a hot rolling mill train.
  • FIG. 3a offers an elevational view, in partial longitudinal section, of the cooling group 14, which shows the cooling ramp 11 made up of successive tubular elements 21 aligned with the outlet axis of the rolling mill.
  • This cooling ramp 11 is located above a tank 22 containing the product cooling water and collecting the water returning from the ramp 11.
  • a variable speed pump 23 is installed in the bottom of the tank 22; it sends the cooling water to the tubular elements 21 via a vertical pipe 24 and a horizontal distribution channel 25, which is itself appropriately connected to the tubular elements 21.
  • the assembly formed by the tank 22 and the cooling ramp 11 is capped by a hood 26, visible in FIG. 4, intended to capture the water vapor coming from the tank 22.
  • This hood is connected to a fan (not represented) by the conduits 27 visible in FIG. 3b and in FIG. 4.
  • Figure 4 shows a view of the installation in cross section along line B-B of Figure 3b.
  • a compartment 28 housing the motor of the pump 23.
  • variable speed pump 23 sends the water from the tank 22, at the required pressure, by the vertical pipe 24 and the horizontal distributor channel 25 to the tubular elements 21. After having cooled the metallic product circulating in these tubular elements, the water returns to the tank 22 where it cools as a result of the aspiration of the steam from the fan. The water therefore circulates in a closed circuit, which reduces consumption.
  • the water level in the tank 22 is kept substantially constant by a conventional water supply not shown in Figures 3 and 4. This water supply can be ten to fifteen times lower than in a conventional installation.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
  • Seeds, Soups, And Other Foods (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)
EP87870122A 1986-09-10 1987-09-04 Einrichtung zum kontinuierlichen Kühlen von Walzprodukten Withdrawn EP0260246A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
LU86577A LU86577A1 (fr) 1986-09-10 1986-09-10 Perfectionnements aux installations de refroidissement en continu de produits metalliques lamines
LU86577 1986-09-10

Publications (2)

Publication Number Publication Date
EP0260246A2 true EP0260246A2 (de) 1988-03-16
EP0260246A3 EP0260246A3 (de) 1988-10-05

Family

ID=19730767

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87870122A Withdrawn EP0260246A3 (de) 1986-09-10 1987-09-04 Einrichtung zum kontinuierlichen Kühlen von Walzprodukten

Country Status (2)

Country Link
EP (1) EP0260246A3 (de)
LU (1) LU86577A1 (de)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2151210A1 (de) * 1971-10-14 1973-04-19 Schloemann Ag Wasserkuehleinrichtung fuer schnelllaufenden walzdraht
CA1097197A (en) * 1977-02-08 1981-03-10 Philippe A. Paulus Method of and apparatus for controlled cooling of metallurgical products
LU78743A1 (de) * 1977-12-21 1979-02-02
BE890102A (fr) * 1981-08-26 1982-02-26 Centre Rech Metallurgique Perfectionnements aux dispositifs de refroidissement pour fil machine

Also Published As

Publication number Publication date
LU86577A1 (fr) 1988-04-05
EP0260246A3 (de) 1988-10-05

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Inventor name: ECONOMOPOULOS, MARIOS