FR2541148A1 - METHOD AND DEVICE FOR CURING HORIZONTAL CONTINUOUS CASTING METALS - Google Patents

Abstract

A.PROCEDE AND DEVICE FOR CASTING METALS IN HORIZONTAL CONTINUOUS CASTS. B. PROCESS CHARACTERIZED IN THAT, AFTER PREHEATING, THE TANK 2 IS CLOSED WITH A CLOSING ELEMENT 11 AND THE HORIZONTAL CONTINUOUS CASTING SHELL 1 IS CLOSED SIMULTANEOUSLY INSIDE THIS CONTINUOUS HORIZONTAL CASTING SHELL 1, A HOLLOW SPACE 13 FOR THE STARTING HEAD OF THE CASTING CORD AND THEN THE EXTRACTION OF THE CASTING CORD IS STARTED AFTER A PREDEFINED LAPS OF TIME. C. THE INVENTION APPLIES TO A PROCESS AND DEVICE FOR HORIZONTAL CONTINUOUS CASTING OF METALS, IN PARTICULAR STEEL.

Description

"Method and apparatus for casting metals in continuous casting

  The invention relates to a method and a device for casting in continuous horizontal castings, metals,

especially steel.

  Such methods or casting devices with starter rods are used to constitute a

  tensile-proof connection between a machine of ex-

  pulling and the bead at the beginning of a casting,

  based on what is known as a semi-casting process

  This means naked For each successive casting, the start-up process must be renewed by putting

implement the device.

  The state of the art is a process and a dis-

  positive to start a bead casting casting

  horizontal pipe, by means of a starter rod, in which process the feed nozzle between the casting tank and the shell, is closed by setting up a fuse plug, and then the molten metal is poured into the tank and then, the plug is melted until the slag particles have risen up in the molten metal and have left the area of the feed nozzle. The problem of avoiding skin damage has to be solved. casting of the bead by slag particles or by

  refractory particles, during the process of starting

rage.

  The known method meets the requirement of

  to dehydrate and completely dry the surfaces

  tanks and continuous casting shell

  It turned out, however, that the cooling

  liquid metal flowing around the cord start head can be further accelerated and that a more energetic bond with the

  start-up head of molten metal cord solidifying.

  The object of the invention is therefore to create a method and the corresponding device to obtain a better cooling and simultaneously constitute the necessary connection between the starting head of the cord and the molten metal cooling, while ensuring easy extraction of the head This goal is achieved, according to the technique of the process, in that, after pre-heating, the reservoir is closed by a closing element and the casting shell.

  continuous horizontal is closed by

  within this continuous casting process.

  horizontal, a hollow space for the starting head of the casting bead, and that subsequently, according to a predetermined filling state in the hollow space for the starting head of the bead, the extraction of the bead of In this method, the molten metal flows without a shock effect around the start-up head of the bead and also bathes the inner shell of the shell, thanks to the solidification of the zones. External cooling can be obtained immediately by cooling the continuous horizontal casting shell. In this case, it is advantageous to directly separate the casting material which solidifies from the inner shell of

  the shell An advantage of the method according to the invention

  It is the very precise determination of the time for start-up during the extraction of the bead. In general, the bead can

  consequently, to be extracted from the casting shell

  Continuous horizontal, more simply and without complications occur As an improvement of the method-according to the invention, it is further proposed that the arrival of the molten metal in the hollow space determined for the starting head of the cord, only takes place when the

  level of the bath in the tank is at least

  These arrangements, which can be controlled over time by means of the closure element of the tank, are advantageous in that they make them available. sufficient quantities of molten metal capable of filling the hollow space very quickly by flowing all around the starting head of the bead The device for carrying out the process is characterized in that a closure body for the casting shell horizontal continuous delimits a hollow space and is connected to a start-up head of the casting cord has at least one arm, which extends from the inside to the outside being inclined relative to the radial plane, and finish by providing an intermediate space with respect to the inner wall

  The head of the cord

  the advantage of not being in contact with the inner wall of the horizontal continuous casting shell, and so not to cause complications when

  the extraction to be spread from this casting shell con-

  In addition, this cord start head creates an extremely safe connection between the

  casting cord and the tiae de débraae.

  The device is further improved in that the closure body, the tapping start head and at least one closure element for the supply port in the furnace compartment are connected together. a precise gap between the closure body and the closure element for the furnace briquetting, a safer closure of the furnace briquetting via one or

  several closing elements, is in this case

  geous. On the basis of these arrangements, it is furthermore possible to provide that the closing element for the feed orifice in the brickwork of the oven, consists of one or more fusible metal plates arranged behind one another. Other For such metal plates, it is possible to retain the aluminum for the casting of various steels With such metal plates arranged one behind the other, the time required for their melting and therefore for the filling of the metal. 'space

  hollow, can be set very precisely.

  According to a complement of the invention, we seek to

  to determine even more precisely the time required

  to fill the hollow space or to properly control the time provided for this purpose,

  a detector is provided in the hollow space to determine

  undermine the fill level of molten metal, detector

  whose power conductors extend to the

  the cross section of the starter rod and are connected to measuring, regulating and

and / or control.

  The electrical switching conditions of these

  measurement, regulation and / or control circuits can

  can be influenced by the fact that the detector is

  killed by two measuring poles that could be connected

  electrically via the molten metal.

  An exemplary embodiment of the invention is shown in the drawing and will be described below more

in detail.

  The single figure of the drawing is an axial section of a horizontal continuous casting shell shortly before the start phase of casting in the case of casting.

  horizontal tin of steel or steel alloys.

  The continuous horizontal casting shell i is

  associated with tank 2 with the interposition of an isola-

  3, an intermediate ring 4 and the ring

  sealing 5 wear resistant.

  The molten metal in particular of the steel, superheated with respect to the melting point, arrives in a

  continues during the casting in the tank 2 and at

  firing of this reservoir 2, through the feed port 6 in the horizontal continuous casting shell 1, where it is extracted as a surface-solidified casting bead.

  Continuous casting of molten metal can not

  time after the start-up process, for

  which a link must be created with the start rod.

  rage 7 to be able to transmit to the casting

extraction efforts.

  In a second phase after the heating of the horizontal continuous casting shell 1, the tank 2 and the horizontal continuous casting shell 1 are simultaneously closed. The closure device is constituted by the closure body 8, which in the example shown is formed of several 8 a graphite plates

  in connection with the starter rod 7 The starter rod

  In addition, rage 7 is connected to the starter head 9 of the cord, and furthermore, on a metal rod 10, as closure elements 11, there are plates of fusible metal 11a. or their metallic material, can be used to adjust in time and quantity the arrival of the molten metal in the continuous horizontal casting shell The establishment of the starting rod 7 with the starting head of the cord 9 at the same time as With the metal rod 10 and the metal plates 11a, automatically close the orifice 2a of the briquetting 2b of the oven During this installation, only the graphite plates 8 slide on the inner wall 1a of the shell This insignificant contact is

  unimportant from the point of view of possible damage to

  However, the starter rod 7 has been introduced with play inside the horizontal continuous casting shell.

  1 by providing an air gap 12.

  Placed on the closure body 8, and secured axially to the starter rod 7, is the device for connecting this starter rod with the

  casting cord to form The starter head 9 of the cor-

  don is disposed in a hollow space 13 for the starting head of the cord, space whose volume is calculated with the volumes connected thereto upstream and is known, so that the time for filling this hollow space 13 of the cord start head, is also determined on the starting head 9 of the cord, are fixed outwardly oriented arms 9 which

  to the inner wall of the shell, one

  In the longitudinal direction of the casting stream, the starting head 9 of the bead is connected by means of the fastening element 15 to the stem of the bead.

start 7.

  For another method of determining the time for the completion of the molten metal filling of the hollow space 13, there is provided the detector 16, whose power supply conductors 16a and 16b pass through the channel 17 which is itself formed by the groove 17a in the wall of the shell and by the groove 17b in the starter rod 7 This channel 17 is dimensioned so that the compressed air in the hollow space 13 by the molten metal The conductors 16a and 16b are connected to the current source 18, while on one of the conductors 16a, 16b there is arranged a signal transmitter 19, for example a control lamp As soon as the measuring poles 20 are electrically connected by the molten metal penetrating into the hollow space 13, the signal transmitter 19 optically announces the end of the filling process, so that the extraction process by means of of the starter rod 7 and a machi extraction not shown in more detail, can begin It goes without saying that the conductors 16a and 16b are part of a measuring circuit,

regulation and / or control.

Claims (3)

R E V E N D I C A T IO N S   1 ') Method For casting in continuous, horizontal castings of metals, in particular steel, in which process the horizontal continuous casting shell is first preheated inside and / or outside while the filling of the tank is   carried out, characterized in that, after preheating,   the tank (2) is closed with an iron element.   (11) and the continuous casting shell (1) horizon-   tale, is closed while simultaneously providing inside this shell (1) continuous horizontal casting, a hollow space (13) for the start head of the cord of   and, subsequently, according to a state of   predetermined wise in the hollow space (13) for the starting head of the bead, the extraction of the bead   * is started after a set period of time   defined. Method according to claim 1, characterized in that the molten metal is introduced into the hollow space (13) provided for the starting head (9) of the bead, only when the level of the bath in the tank (2) is at least above the level of the inlet (6) of the casting-in the shell   continuous horizontal casting (1).   30) Device for implementing the method   according to any one of claims 1 and 2,   characterized in that a closing body (8) for the horizontal continuous casting shell (1) delimits a hollow space (13) and is connected to a starting head (9) of the   casting cord has at least one arm (9 a), the   cruel extends from the inside to the outside by being   with respect to the radial plane, and terminates by providing an intermediate space (14) with respect to the inner wall (la) of the shell.   4) Device according to claim 3, characterized   characterized in that the closing body (8), the starting head (9) of the casting bead and at least one closing element (11) for the supply opening (2 a) in   the briquetting (2b) of the oven are connected together.   5) Device according to claim 4, characterized in that eue the closure element (11) for the supply port (2 a) in the briquetting (2b) of the oven, consists of one or more fusible metal plates   (11a) arranged one behind the other.   60) Device according to any one of the   3 to 5, characterized in that a detector (16) is provided in the hollow space (13) for detecting the molten metal filling level, the detector of which   supply conductors (16a, 16b) extend to the   inside the cross-section of the starter rod.   rage (7) and are connected to measuring circuits, regulation and / or control.   Device according to claim 6, characterized   in that the detector (16) consists of two   measuring poles (20) capable of being electrically   only through the molten metal.   Ic t-4 ce. U-4 IC> a t to 4% oe * Publication number ________ 1 4 <9 Date information entered 27/01/88 operator MAMIE extension 2 Batch name 2-070-27 / 01 / 88 Type of document Ai Existence of a summary YES Total number of pages 7   Number 1 page of claims 5   Last page numbered 5 Number of boards 1 Faults: