FR2689553A1 - Brick with a hole. - Google Patents

Abstract

This hole brick has a continuous opening (12) for receiving a hole brick socket and / or gas scavenging brick, for use in molten metallurgical vessels, in which the longitudinal centerline (M ) of the opening extends at an angle, facing outward, less than 45 degree with respect to the vertical longitudinal center line (V) of the brick.

Description

i

BRICK WITH A HOLE

  The invention relates to a brick with a hole, with an or-

  through-hole, in order to receive a lining of hole bricks and / or a gas sweeping brick as used in the field of metallurgical vessels for molten products. In the document Radex-Rundschau, notebook 4, 1986, 203 are shown different forms of construction of gas sweeping bricks, with the help of which gases, in particular inert gases, partly in combination with pulverulent additives, are infused into products

  in fusion contained in metallurgical vessels.

  Usually, such gas bricks are made in what are called hole bricks,

  if necessary by interposing what is called a sleeve15 or a socket of bricks with holes.

  Hole bricks of the known type have a hole

  central passage (opening), the longitudinal axis of which

  dian is oriented vertically, when the hole brick is

  mounted in the bottom of a metallurgical container to pro-

  molten parts In the case of making the wall of a metallurgical container for molten products, the orientation of the median longitudinal axis of the opening

is, therefore, horizontal.

  The opening of the brick with holes has, most of the time, the shape of a truncated cone, park also that the sweeping brick with gas (respectively the lining of bricks with holes) has a frustoconical shape, although

  other forms of construction are known.

  The invention, described in detail below, refers to a brick with a hole intended to receive gas sweeping bricks (respectively brick linings with corresponding holes) of known construction form. Known hole bricks have proven themselves in principle Likewise, there is a constant need

  to further optimize such bricks with holes, in order to improve

  the secondary metallurgical processes, in the sense

  homogenization of the molten product and its elimination

  tion of non-metallic inclusions.

  To this end, the invention proposes a brick with a hole

  with a through opening, to receive a trim

  ture of hole bricks and / or a gas sweeping brick,

  for use in metallurgical containers of

  melted, characterized in that the longitudinal median axis of the opening extends at an angle, oriented outwards, less than 450 relative to

  the vertical median longitudinal axis of the hole brick.

  As shown in the aforementioned state of the art, the orientation given so far to the hole brick and the associated gas sweep brick was such that the median longitudinal axes of the two construction elements; tion were oriented vertically after mounting in

  the bottom of a metallurgical container for fused products

  This is why this vertical orientation was also considered to be unavoidable, because the

  gas sweeping brick, after wear, must be ex-

  deals with the permanent lining, respectively of the brick with the hole, or the lining of the brick with the hole, which is why we know corresponding extraction devices,

  as described in more detail in EP O 137 961 Bi.

  In any case, it turned out that the vertical orientation

  exact hold of the gas sweeping brick, respectively of the brick with afferent hole, could not be closed with

  absolutely safe, when mounting in the bottom of the

  metallurgical melting vessel Thus, for example, when masonrying the gas sweeping brick in the hole brick, there may occasionally be an axial offset

  very weak of the sweeping brick, which results in

  that the jet of sweeping gas that comes out is not exactly vertical, but extends by making a certain

  3 angle to the vertical This then results in

  quence that, for example, in the area of the calamines zone, there occurs on the sweeping brick, on the bottom side, premature, undesirable wear of the refractory masonry, in particular when the sweeping brick is used duration of several charges.

  The configuration according to the invention of the brick with a hole makes it possible to remedy this, because due to the posi-

  tilted intentionally from the opening of the hole brick, it is possible to mount the gas sweep brick in such a way that the direction of the gas outlet (for example, the extension of the gas supply channels for gas sweeping bricks with porosity

  oriented) is oriented towards the center of the metal container -

  lurgical of molten products, for example the ladle. This is of particular importance, since the gas sweep bricks are not, as a rule,

  not mounted in the center of the metallurgical vessel to pro-

  fused, but eccentrically, and are then

  partly positioned relatively close to the side wall

  of the container of molten product.

  According to the invention, the hole brick has an opening

  inclined ture prepared, so that the sweeping brick can be mounted directly, for example in the bottom of a metallurgical vessel for molten products, in such a way that the extension of the longitudinal longitudinal axis of the opening oriented oblique extends away

  side walls of the metallurgical vessel to pro-

  duits in fusion, to go towards its center.

  According to the invention, the angle of inclination must be less than 45, an angle of inclination between 1 and, relative to the vertical longitudinal median axis of the

  brick with hole, in front as a rule suffice.

  Preferably, the shape of the hole brick opening is adapted to the outside shape of the hole brick socket or of the gas sweeping brick. Thus, the opening can be slightly larger than the outside shape. of the hole brick socket or the gas sweeping brick, so that the hole brick socket or the gas sweeping brick can be fixed without difficulty in the hole brick, interposing a layer

mortar.

  In particular, in the case of small angles of inclination

  naiàon, surprisingly, no problem arises during the subsequent extraction of the gas sweeping brick, out of the hole brick, even when using a conventional extraction device On the contrary, taking some slightly eccentric of the extraction device, leads to a corresponding strong traction, making even, in addition, the brick with hole can be more easily extracted from the socket

  brick to hole or brick to hole.

  With the exception of the characteristic of the orientation of its opening, the brick with hole corresponds for the rest

  to classic building forms.

  This has the advantage that the hole brick according to the invention can also be retrofitted without difficulty on existing installations. Because the hole brick is also arranged for the rest as previously in the bottom of the container. metallurgical for molten products, it is also possible to extract it using a brick extraction device with a hole also known, insofar as this is desired,

  once a corresponding wear has been reached.

  Although the hole brick can be used to accommodate all types of gas sweeping bricks, the

  advantages described above are obtained in particular

  lière for gas sweeping bricks, with oriented porosity, by so-called sweeping segments or by so-called sweeping joints, since these allow to obtain a defined orientation of the

outlet of the supplied gases.

  The invention is explained in more detail below,

  using an exemplary embodiment.

  The single figure represents - in a highly schematic form a brick with a hole according to the invention with a

  gas sweeping brick inserted therein.

  We denote by reference 10, the brick with hole

  itself, which has a central opening 12.

  The vertical median longitudinal axis of the brick at

  hole 10 is materialized by the letter "V", and the axis longi-

  median tudinal opening 12 is materialized by the

reference letter "M".

  As a result, in the present example of realization

  sation, the median longitudinal axis M extends (being oriented outwards) at an angle of 60 relative to "

  the median longitudinal axis of the brick with hole 10, from where

  generally follows an inclined, outward-facing position of the masonry gas sweeping brick 14

in the central opening 12.

  The figure also shows that both the opening 12 and also the gas sweeping brick 14 have a frustoconical shape, known per se. Due to the inclined position of the opening 12, the upper and lower ends of the brick gas sweep 14, extend

  not aligned with the upper ends res-

  pectively lower of the brick with hole 10, but in fact

  sant a corresponding angle, which does not harm overall

to the device.

  The gas sweeping brick 14 is configured in the usual way, a gas connection tube 16 being

  shown here, again only schematically.

  The embodiment shown in the figure can also be obtained in a similar manner, when between the hole brick 10 and the gas sweep brick 12 is

  still arranged a brick socket with hole (not shown

  tee), both the hole brick socket and also the brick

  gas sweep 14, then having the inclined position shown, the brick socket with hole and the gas sweeping brick may again have

classic building forms.

Claims (4)

CLAIMS -   1 Brick with hole, having a continuous opening (12), to receive a socket of brick with hole and / or a gas sweeping brick (14), for use in   metallurgical vessels with molten products, characteristic   terized in that the longitudinal median axis (M) of the opening   ture (12) extends at an angle, oriented outwards   laughing, less than 45 relative to the median axis longitu-   vertical dinal (V) of the brick with hole (10).   2 Brick with hole according to claim 1, character-   in that the longitudinal median axis (M) of the opening   ture (12) extends at an angle, oriented outwards   laughing, between 1 and 100 with respect to the median axis   longitudinal vertical (V) of the brick with hole (10).   3 Brick with hole according to claim-1 or 2, ca-   characterized in that the shape of the opening (12) is suitable   tee to the external shape of the brick lining with hole   or gas sweeping brick (14).   4 Brick with hole according to one of claims 1 to 3,   characterized in that the opening (12) is slightly larger than the external shape of the brick lining to   hole or gas sweeping brick (14). z