EP0069616B1 - Device for cooling steel wire spirals in the rolling heat - Google Patents

Device for cooling steel wire spirals in the rolling heat Download PDF

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Publication number
EP0069616B1
EP0069616B1 EP19820401083 EP82401083A EP0069616B1 EP 0069616 B1 EP0069616 B1 EP 0069616B1 EP 19820401083 EP19820401083 EP 19820401083 EP 82401083 A EP82401083 A EP 82401083A EP 0069616 B1 EP0069616 B1 EP 0069616B1
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EP
European Patent Office
Prior art keywords
baffle plate
upper wall
louvres
air
turns
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.)
Expired
Application number
EP19820401083
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German (de)
French (fr)
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EP0069616A1 (en
Inventor
Robert Alberny
Dominique Duverger
Christian Poette
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Institut de Recherches de la Siderurgie Francaise IRSID
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Institut de Recherches de la Siderurgie Francaise IRSID
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Publication of EP0069616A1 publication Critical patent/EP0069616A1/en
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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C47/00—Winding-up, coiling or winding-off metal wire, metal band or other flexible metal material characterised by features relevant to metal processing only
    • B21C47/26—Special arrangements with regard to simultaneous or subsequent treatment of the material
    • B21C47/262—Treatment of a wire, while in the form of overlapping non-concentric rings
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C21D9/54—Furnaces for treating strips or wire
    • C21D9/56—Continuous furnaces for strip or wire
    • C21D9/573—Continuous furnaces for strip or wire with cooling
    • C21D9/5732—Continuous furnaces for strip or wire with cooling of wires; of rods

Definitions

  • the present invention relates to the cooling of turns of steel wires in the hot rolling mill.
  • Certain winding cooling devices currently used include a conveyor formed by a series of blowing boxes above which the turns move in spread form and are cooled by blowing air through openings, or openings, present on the boxes. so that the transformation) ⁇ ⁇ of the steel occurs at a determined speed.
  • the object of the present invention is precisely to solve the problem described above. More particularly, the object of the invention is to provide a device making it possible to improve the efficiency and the homogeneity of the cooling of turns of steel wires.
  • the subject of the invention is a device for the accelerated cooling of turns of steel wires in the hot rolling, of the type of those which include a conveyor formed by a series of blowing boxes whose upper wall has openings lateral and central, called “gills", by which air is blown on the turns of wires which move above the upper wall of the boxes, the downstream part relative to the direction of movement of the turns of each of said gills being provided with a plate, called "wing”, which is inclined towards the inside of the box and towards the upstream part of the hole (FR-A-2297679).
  • a conveyor formed by a series of blowing boxes whose upper wall has openings lateral and central, called “gills”, by which air is blown on the turns of wires which move above the upper wall of the boxes, the downstream part relative to the direction of movement of the turns of each of said gills being provided with a plate, called “wing”, which is inclined towards the inside of the box and towards the upstream part of the hole (FR-A-2297679).
  • the device is characterized in that, at least for some of the gills, the angle of inclination of the wing relative to the upper wall of the box is less than 20 ° and said wing is extended by a plate, called "fin", which is parallel to the upper wall of the box, so as to delimit a passage of the blown air.
  • the wing is a rectangular plate whose sides are provided with vertical edges.
  • the wing is a plate which has the shape of a trapezoid whose large base corresponds to the downstream part of the louver and whose sides, provided with vertical edges, an angle of 60 ° to 85 ° with the downstream part of the hearing.
  • the wing is a plate which has the shape of a rectangular trapezium whose large base corresponds to the downstream part of the gutter and whose sides are provided with vertical edges, the side located towards the central part of the box making an angle of 60 ° to 85 ° with the downstream part of the hearing.
  • a water nozzle is placed at the outlet of the passage delimited between the fin and the upper wall of the box, said nozzle being oriented so that the water jet is parallel to the wing.
  • water can be injected in the form of finely divided droplets or in the form of vapor.
  • the configuration of the vents of the device according to the invention allows more uniform continuous cooling.
  • the blown air circulates at high speed along the bed of the turns of the wires. It should be noted that the air blown by the passage delimited between the upper wall of the boxes and the fin allows a turbulent flow plated at its outlet from the hearing against the upper wall, which allows very effective cooling.
  • vents according to the invention are only necessary in the cooling zones where there is a risk of recalescence of the steel wires.
  • the cooling device is located after the finishing cages and a winding head (not shown in the figures) placed in series.
  • This device constitutes a conveyor comprising a series of blower boxes 1, called “ventilation” whose upper wall 2 has openings called “gills”, namely, two lateral series of gills 3 and 4 and a central series of gills 5.
  • the turns of steel wires 6 move in direction A (indicated by the arrow) by means of conveyor chains 7 and 7 ′ which are mounted above the upper wall 2 of the boxes.
  • each box 1 is provided with a fan 8 in order to blow air through the openings 3, 4 and 5 on the turns 6. It goes without saying that each box 1 has several openings 3, 4 and 5 on its upper wall 2, although FIG. 2 only shows a hole 5 to simplify the explanations.
  • the plate 9 has the shape of a trapezoid for the central vents 5, and the shape of a rectangular trapezium for the lateral vents 3 and 4.
  • This preferred configuration allows a better cooling of the portions of turns 6 at the level of the chains 7 and 7 ': in fact, the air arrives the passage 11, delimited between the fin 10 and the upper wall 2 of the box; it then circulates on the inclined plate 9 and, thanks to the particular geometry of this plate 9, is oriented towards the chains 7 and 7 '.
  • the angle of inclination a of the wing 9 is less than 20 ° and preferably about 10 °.
  • the plate 10 of rectangular shape called "fin", which is parallel to the upper wall 2 so as to delimit the passage of the blown air 11, can be fixed to the wing 9 by suitable means, for example by welding.
  • the nozzle 12 is placed at the outlet of the passage 11, that is to say in the vicinity of the end of the fin 10 adjacent to the wing 9.
  • the nozzle 12 is connected to a tube 13 which passes through the fin and which is itself connected to a water pipe 14.
  • the nozzle 12 is preferably of the flat jet type. It is oriented so that the water jet is parallel to wing 9.
  • Water is preferably injected in the form of vapor.
  • the injected vapor is cooled by the blown air and transformed into a very fine mist, which is preferable for obtaining rapid and uniform cooling of the turns of the wires 6.
  • FIG. 2 shows a compact water-compressed air ramp 15 placed above the bed of the turns of wires 6.
  • the compact ramp 15 is supplied with water by a tube 16 and with air by a tube 17. can use this compact boom 15 independently or simultaneously with the nozzle 12.
  • the steel wires are cooled with water to a temperature of 650 to 800 ° C and min in turns by means of a head (not shown in the figures) for the depositing turns on the conveyor chains 7 and 7 '.
  • the spread turns of wire 6 thus formed are then moved by chains 7 and 7 'a short distance above the upper walls 2 of the boxes 1.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)

Description

La présente invention concerne le refroidissement de spires de fils en acier dans la chaude de laminage.The present invention relates to the cooling of turns of steel wires in the hot rolling mill.

Pour donner aux fils en acier des caractéristiques déterminées, il est connu de leur faire subir un traitement thermique, dit patentage, directement dans la chaude de laminage. De façon plus précise, ce traitement consiste à refroidir les fils, à la sortie des cages finisseuses, par arrosage d'eau à partir d'une température d'environ 1000°C jusqu'à une température de 650 à 800°C. On met ensuite les fils sous forme de spires qu'on envoie alors à un dispositif de refroidissement.To give steel wires specific characteristics, it is known to subject them to a heat treatment, known as patenting, directly in the hot rolling mill. More precisely, this treatment consists in cooling the wires, at the outlet of the finishing cages, by sprinkling water from a temperature of approximately 1000 ° C. to a temperature of 650 to 800 ° C. The wires are then put in the form of turns which are then sent to a cooling device.

Certains dispositifs de refroidissement de spires utilisés actuellement comportent un convoyeur formé par une série de caissons soufflants au-dessus desquels les spires se déplacent sous forme étalée et sont refroidies par soufflage d'air au travers d'ouvertures, ou ouïes, présentes sur les caissons de façon à ce que la transformation )→α de l'acier se produise à une vitesse déterminée.Certain winding cooling devices currently used include a conveyor formed by a series of blowing boxes above which the turns move in spread form and are cooled by blowing air through openings, or openings, present on the boxes. so that the transformation) → α of the steel occurs at a determined speed.

Toutefois, lors du refroidissement des spires dans des dispositifs de ce type, il peut se produire une forte recalescence de l'acier due à l'enthalpie de la transformation )→α. Ce phénomène ralentit la vitesse de refroidissement et par conséquent diminue la résistance mécanique des fils. Afin de résoudre ce problème, on a proposé d'injecter de l'eau pulvérisée sur les spires de fils au cours du refroidissement. Mais les gouttes d'eau formées produisent un refroidissement non homogène des spires, ce qui nuit à leurs propriétés mécaniques.However, during the cooling of the turns in devices of this type, there can be a strong recalescence of the steel due to the enthalpy of the transformation) → α. This phenomenon slows down the cooling rate and consequently decreases the mechanical resistance of the wires. In order to solve this problem, it has been proposed to inject water spray on the turns of the wires during cooling. However, the drops of water formed produce uneven cooling of the turns, which affects their mechanical properties.

Le but de la présente invention est justement de résoudre le problème décrit ci-dessus. Plus particulièrement, le but de l'invention est de fournir un dispositif permettant d'améliorer l'efficacité et l'homogénéité du refroidissement de spires de fils en acier.The object of the present invention is precisely to solve the problem described above. More particularly, the object of the invention is to provide a device making it possible to improve the efficiency and the homogeneity of the cooling of turns of steel wires.

A cet effet, l'invention a pour objet un dispositif pour le refroidissement accéléré de spires de fils en acier dans la chaude de laminage, du type de ceux qui comportent un convoyeur formé par une série de caissons soufflants dont la paroi supérieure présente des ouvertures latérales et centrales, dites "ouïes", par lesquelles de l'air est soufflé sur les spires de fils qui se déplacent su-dessus de la paroi supérieure des caissons, la partie aval par rapport au sens de déplacement des spires de chacune desdites ouïes étant munie d'une plaque, dit "aile", qui est inclinée vers l'intérieur du caisson et vers la partie amont de t'ouïe (FR-A-2297679). Selon l'invention, le dispositif est caractérisé en ce que, au moins pour certaines des ouïes, l'angle d'inclinaison de l'aile par rapport à la paroi supérieure du caisson est inférieur à 20° et ladite aile est prolongée par une plaque, dite "aileron", qui est parallèle à la paroi supérieure du caisson, de façon à délimiter un passage de l'air soufflé.To this end, the subject of the invention is a device for the accelerated cooling of turns of steel wires in the hot rolling, of the type of those which include a conveyor formed by a series of blowing boxes whose upper wall has openings lateral and central, called "gills", by which air is blown on the turns of wires which move above the upper wall of the boxes, the downstream part relative to the direction of movement of the turns of each of said gills being provided with a plate, called "wing", which is inclined towards the inside of the box and towards the upstream part of the hole (FR-A-2297679). According to the invention, the device is characterized in that, at least for some of the gills, the angle of inclination of the wing relative to the upper wall of the box is less than 20 ° and said wing is extended by a plate, called "fin", which is parallel to the upper wall of the box, so as to delimit a passage of the blown air.

Selon un mode de réalisation, l'aile est une plaque rectangulaire dont les côtés sont munis de rebords verticaux.According to one embodiment, the wing is a rectangular plate whose sides are provided with vertical edges.

Selon une variante de réalisation préférée, pour les ouïes centrales, l'aile est une plaque qui a la forme d'un trapèze dont la grande base correspond à la partie aval de l'ouïe et dont les côtés, munis de rebords verticaux, font un angle de 60° à 85° avec la partie aval de l'ouïe. Pour les ouïes latérales, l'aile est une plaque qui a la forme d'un trapèze rectangle dont la grande base correspond à la partie aval de l'ouïe et dont les côtés sont munis de rebords verticaux, le côté situé vers la partie centrale du caisson faisant un angle de 60° à 85° avec la partie aval de l'ouïe.According to a preferred embodiment, for the central louvers, the wing is a plate which has the shape of a trapezoid whose large base corresponds to the downstream part of the louver and whose sides, provided with vertical edges, an angle of 60 ° to 85 ° with the downstream part of the hearing. For the lateral gills, the wing is a plate which has the shape of a rectangular trapezium whose large base corresponds to the downstream part of the gutter and whose sides are provided with vertical edges, the side located towards the central part of the box making an angle of 60 ° to 85 ° with the downstream part of the hearing.

Selon un mode de réalisation de l'invention, un gicleur d'eau est placé à la sortie du passage délimité entre l'aileron et la paroi supérieure du caisson, ledit gicleur étant orienté de façon à ce que le jet d'eau soit parallèle à l'aile.According to one embodiment of the invention, a water nozzle is placed at the outlet of the passage delimited between the fin and the upper wall of the box, said nozzle being oriented so that the water jet is parallel to the wing.

Selon l'invention, l'eau peut être injectée sous forme de gouttelettes finement divisées ou sous forme de vapeur.According to the invention, water can be injected in the form of finely divided droplets or in the form of vapor.

Comme on pourra le comprendre, la configuration des ouïes du dispositif selon l'invention permet un refroidissement continu plus homogène. En effet, l'air soufflé circule à grande vitesse le long du lit des spires de fils. Il est à noter que l'air soufflé par le passage délimité entre la paroi supérieure des caissons et l'aileron permet un écoulement turbulant plaqué à sa sortie de l'ouïe contre la paroi supérieure, ce qui permet un refroidissement très efficace.As can be understood, the configuration of the vents of the device according to the invention allows more uniform continuous cooling. In fact, the blown air circulates at high speed along the bed of the turns of the wires. It should be noted that the air blown by the passage delimited between the upper wall of the boxes and the fin allows a turbulent flow plated at its outlet from the hearing against the upper wall, which allows very effective cooling.

Lorsqu'on injecte de l'eau pulvérisée par le gicleur qui est placé dans l'ouïe, cette eau se mélange à l'air soufflé, ce qui la transforme en brouillard. L'injection d'eau sous forme de vapeur conduit à un brouillard plus fin et permet donc un refroidissement plus homogène des spires de fils.When we inject water sprayed by the nozzle which is placed in the hearing, this water mixes with the blown air, which transforms it into mist. The injection of water in the form of vapor leads to a finer mist and therefore allows more homogeneous cooling of the turns of the wires.

La configuration des ouïes conforme à l'invention n'est nécessaire que dans les zones de refroidissement où il y a risque de recalescence des fils en acier.The configuration of the vents according to the invention is only necessary in the cooling zones where there is a risk of recalescence of the steel wires.

L'invention sera bien comprise et d'autres aspects et avantages ressortiront plus clairement au vu de la description qui suit, donnée à titre purement illustratif et en référence aux dessins annexés dans lesquels:

  • - la figure 1 représente une vue de dessus d'une partie du dispositif pour le refroidissement de spires de fils;
  • - la figure 2 représente une vue en coupe, selon la ligne Y-Y de la figure 1, d'un mode de réalisation d'une ouïe selon l'invention.
The invention will be well understood and other aspects and advantages will emerge more clearly in the light of the description which follows, given purely by way of illustration and with reference to the appended drawings in which:
  • - Figure 1 shows a top view of a part of the device for cooling son turns;
  • - Figure 2 shows a sectional view, along the line YY of Figure 1, of an embodiment of a hearing according to the invention.

Comme on le sait, le dispositif de refroidissement se situe après les cages finisseuses et une tête de mise en spires (non représentées sur les figures) placées en série. Ce dispositif constitue un convoyeur comportant une série de caissons soufflants 1, dits de "ventilation" dont la paroi supérieure 2 présente des ouvertures dites "ouïes", à savoir, deux séries latérales d'ouïes 3 et 4 et une série centrale d'ouïes 5. Les spires de fils en acier 6 se déplacent dans le sens A (indiqué par la flèche) grâce à des chaînes de convoyage 7 et 7' qui sont montées au-dessus de la paroi supérieure 2 des caissons. Comme représenté sur la figure 2, chaque caisson 1 est muni d'un ventilateur 8 afin de souffler l'air par les ouïes 3, 4 et 5 sur les spires 6. Il va de soi que chaque caisson 1 comporte plusieurs ouïes 3, 4 et 5 sur sa paroi supérieure 2, bien que la figure 2 ne montre qu'une ouïe 5 pour simplifier les explications.As is known, the cooling device is located after the finishing cages and a winding head (not shown in the figures) placed in series. This device constitutes a conveyor comprising a series of blower boxes 1, called "ventilation" whose upper wall 2 has openings called "gills", namely, two lateral series of gills 3 and 4 and a central series of gills 5. The turns of steel wires 6 move in direction A (indicated by the arrow) by means of conveyor chains 7 and 7 ′ which are mounted above the upper wall 2 of the boxes. As shown in FIG. 2, each box 1 is provided with a fan 8 in order to blow air through the openings 3, 4 and 5 on the turns 6. It goes without saying that each box 1 has several openings 3, 4 and 5 on its upper wall 2, although FIG. 2 only shows a hole 5 to simplify the explanations.

Dans le monde de réalisation représenté sur les figures 1 et 2, la plaque 9 a la forme d'un trapèze pour les ouïes centrales 5, et la forme d'un trapèze rectangle pour les ouïes latérales 3 et 4. Cette configuration préférée permet un meilleur refroidissement des portions de spires 6 au niveau des chaînes 7 et 7': en effet, l'air arrive le passage 11, délimité entre l'aileron 10 et la paroi supérieure 2 du caisson; il circule alors sur la plaque inclinée 9 et, grâce à la géométrie particulière de cette plaque 9, est orienté vers les chaînes 7 et 7'.In the embodiment shown in FIGS. 1 and 2, the plate 9 has the shape of a trapezoid for the central vents 5, and the shape of a rectangular trapezium for the lateral vents 3 and 4. This preferred configuration allows a better cooling of the portions of turns 6 at the level of the chains 7 and 7 ': in fact, the air arrives the passage 11, delimited between the fin 10 and the upper wall 2 of the box; it then circulates on the inclined plate 9 and, thanks to the particular geometry of this plate 9, is oriented towards the chains 7 and 7 '.

Dans le dispositif selon l'invention, l'angle d'inclinaison a de l'aile 9 est inférieur à 20° et, de préférence, d'environ 10°. La plaque 10 de forme rectangulaire dite "aileron", qui est parallèle à la paroi supérieure 2 de façon à délimiter le passage de l'air soufflé 11, peut être fixée à l'aile 9 par des moyens appropriés, par exemple par soudage.In the device according to the invention, the angle of inclination a of the wing 9 is less than 20 ° and preferably about 10 °. The plate 10 of rectangular shape called "fin", which is parallel to the upper wall 2 so as to delimit the passage of the blown air 11, can be fixed to the wing 9 by suitable means, for example by welding.

Le gicleur 12 est placé à la sortie du passage 11, c'est-à-dire au voisinage de l'extrémité de l'aileron 10 adjacente à l'aile 9. Le gicleur 12 est connecté à un tube 13 qui traverse l'aileron et qui est lui-même connecté à une canalisation d'eau 14. Le gicleur 12 est, de préférence, du type à jet plat. Il est orienté de façon à ce que le jet d'eau soit parallèle à l'aile 9.The nozzle 12 is placed at the outlet of the passage 11, that is to say in the vicinity of the end of the fin 10 adjacent to the wing 9. The nozzle 12 is connected to a tube 13 which passes through the fin and which is itself connected to a water pipe 14. The nozzle 12 is preferably of the flat jet type. It is oriented so that the water jet is parallel to wing 9.

L'eau est, de préférence, injectée sous forme de vapeur. Dans ce ces, la vapeur injectée est refroidie par l'air soufflé et transformée en un brouillard très fin, ce qui est préférable pour obtenir un refroidissement rapide et homogène des spires de fils 6.Water is preferably injected in the form of vapor. In this case, the injected vapor is cooled by the blown air and transformed into a very fine mist, which is preferable for obtaining rapid and uniform cooling of the turns of the wires 6.

On a représenté, sur la figure 2, une rampe compacte eau-air comprimé 15 placée au-dessus du lit des spires de fils 6. La rampe compacte 15 est alimentée en eau par un tube 16 et en air par un tube 17. On peut utiliser cette rampe compacte 15 indépendamment ou simultanément avec le gicleur 12.FIG. 2 shows a compact water-compressed air ramp 15 placed above the bed of the turns of wires 6. The compact ramp 15 is supplied with water by a tube 16 and with air by a tube 17. can use this compact boom 15 independently or simultaneously with the nozzle 12.

Le fonctionnement du dispositif selon l'invention est le suivant.The operation of the device according to the invention is as follows.

Comme on le sait, après le bloc finisseur, les fils en acier sont refroidis à l'eau jusqu'à une température de 650 à 800°C et min en spires au moyen d'une tête (non représentée sur les figures) pour la dépose des spires sur les chaînes de convoyage 7 et 7'. Les spires étalées de fil 6 ainsi constitutées sont alors déplacées par les chaînes 7 et 7' à faible distance au-dessus des parois supérieures 2 des caissons 1.As is known, after the finishing block, the steel wires are cooled with water to a temperature of 650 to 800 ° C and min in turns by means of a head (not shown in the figures) for the depositing turns on the conveyor chains 7 and 7 '. The spread turns of wire 6 thus formed are then moved by chains 7 and 7 'a short distance above the upper walls 2 of the boxes 1.

Par ailleurs, de l'air est aspiré dans le caisson 1 et s'écoule dans le passage 11. C'est ainsi que l'écoulement d'air par l'ouïe est mieux dirigé, ce qui permet un refroidissement efficace. L'air est alors orienté par l'aile 9 vers le lit des spires 6. Comme l'angle d'inclinaison ce de l'aile 9 par rapport à la paroi supérieure 2 est inférieur à celui des dispositifs de type classique, l'air soufflé s'écoule le long du lit des spires de fils 6.Furthermore, air is sucked into the box 1 and flows through the passage 11. This is how the air flow through the hearing is better directed, which allows efficient cooling. The air is then directed by the wing 9 towards the bed of the turns 6. As the angle of inclination ce of the wing 9 with respect to the upper wall 2 is less than that of the devices of conventional type, the supply air flows along the bed of the wire turns 6.

Lorsqu'on injecte de l'eau par le gicleur à jet plat 12, cette eau est mélangée avec l'air soufflé et donc transformée en brouillard. Comme le gicleur 12 est placé à la sortie du passage 11, il n'y a pas risque de formation de gouttes d'eau sur la face interne de la paroi supérieure 2. Comme on l'a déjà expliqué précédemment, l'injection d'eau sous forme de vapeur est préférable.When water is injected by the flat jet nozzle 12, this water is mixed with the blown air and therefore transformed into mist. As the nozzle 12 is placed at the outlet of the passage 11, there is no risk of water drops forming on the internal face of the upper wall 2. As already explained above, the injection of water in the form of steam is preferable.

Il va de soi que la présente invention n'est pas limitée aux modes de réalisation particuliers décrits.It goes without saying that the present invention is not limited to the particular embodiments described.

Claims (5)

1. A device for high-speed cooling of steel- wire turns (6) in the heat of a hot-rolling mill, of the type comprising a conveyor consisting of a number of air-blast boxes (1) the upper wall of which is provided with middle (5) and side openings (3), (4) called 'louvres' through which air is blown onto the wire turns (6) which move above the upper wall (2), the forward portion, in relation to the direction of motion of the turns of each said louvre including a 'baffle plate' (9), sloping towards the inside of the air box (1) and also to the rear portion of the louvre, a device characterized in that, at least for some of the louvres, the angle of slope (α) of the baffle plate (9), in relation to the upper wall (2) of the air box (1) is less than 20° and that said baffle plate (9) is extended by a shorter portion (10) which is parallel with the upper wall (2) of the air box (1), so as to delimit the blown-air flow area (11).
2. A device, according to claim 1, characterized in that the baffle plate (9) of the louvres consists of a rectangular plate the sides of which are flanged.
3. A device according to claim 1 characterized in that the baffle plate (9) of the middle louvre (5) consists of a plate shaped as a trapezium the major base of which corresponds to the louvres downward portion and the flanged sides of which are at an angle from 60° to 85° in relation to the louvres downward portion.
4. A device, according to claim either 1 or 3, characterized in that the baffle plate (9) of the side louvres (3), (4) is shaped as a right-angled trapezium of which the major base corresponds to the downward portion of the louvre, the sides of said baffle-plate (9) being flanged, the sides inward to the middle of the air box sloping at an angle from 60° to 85° with the front portion of the louvre.
5. A device according to one of the claims 1 to 4, characterized in that a water-injecting nozzle (12) is at the outlet of the flow area (11) delimited between the shorter end portion (10) of baffle plate (9) and the upper wall (2) of the air box (1), said nozzle being set so that the water jet be parallel with baffle plate (9).
EP19820401083 1981-06-22 1982-06-15 Device for cooling steel wire spirals in the rolling heat Expired EP0069616B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8112456 1981-06-22
FR8112456A FR2507930A1 (en) 1981-06-22 1981-06-22 DEVICE FOR COOLING SPIRITS OF STEEL WIRES IN HOT ROLLED

Publications (2)

Publication Number Publication Date
EP0069616A1 EP0069616A1 (en) 1983-01-12
EP0069616B1 true EP0069616B1 (en) 1984-12-12

Family

ID=9259851

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19820401083 Expired EP0069616B1 (en) 1981-06-22 1982-06-15 Device for cooling steel wire spirals in the rolling heat

Country Status (3)

Country Link
EP (1) EP0069616B1 (en)
DE (1) DE3261534D1 (en)
FR (1) FR2507930A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT8360480V0 (en) * 1983-11-28 1983-11-28 Danieli Off Mecc FORMING AND HEAT TREATMENT PLANT OF COMPACT HANDS AND LAMINATE WIRE.
IN164702B (en) * 1984-10-09 1989-05-13 Morgan Construction Co
JP2721861B2 (en) * 1988-09-16 1998-03-04 トーア・スチール株式会社 Direct quenching method for hot rolled steel wire

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE328602B (en) * 1962-08-24 1970-09-21 Morgan Construction Co
GB1323757A (en) * 1969-12-01 1973-07-18 Nippon Kokan Kk Method and apparatus for cooling hot metals
US3940967A (en) * 1975-01-10 1976-03-02 Morgan Construction Company Apparatus for controlled cooling hot rolled steel rod in direct sequence with rod mill
FR2297679A1 (en) * 1975-01-18 1976-08-13 Kobe Steel Ltd PROCESS AND MACHINE FOR COOLING BARS AFTER THEIR HOT ROLLING
US4168993A (en) * 1978-08-10 1979-09-25 Morgan Construction Company Process and apparatus for sequentially forming and treating steel rod

Also Published As

Publication number Publication date
DE3261534D1 (en) 1985-01-24
FR2507930B1 (en) 1983-11-10
EP0069616A1 (en) 1983-01-12
FR2507930A1 (en) 1982-12-24

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