SE440143B - STONE FOR INFOING A METALLURGICAL CONTAINER - Google Patents

Description

800307lv5 angle, ie the differences between the width of the stones' outside and inside. Despite this advantage of the second technique, the known lateral stones entail dubious disadvantages, especially in the case of mechanized masonry of linings. As soon as the rate of masonry increases, in fact, the mason can no longer react quickly enough to correct in time for variations in wedge shape in relation to the ideal plan for masonry lining. This delays the lining work and causes the mason to accumulate such stones that it completely disorganizes the masonry. The desired time saving during the lining work as a result of a higher paving rate is then almost completely lost.

The invention relates to a refractory brick which overcomes the above-mentioned disadvantage of the technique when lining with side-by-side stones. The stone according to the invention simplifies the implantation and allows compensation for any unintentional change in the curvature which may occur in the masonry yard. This is achieved by each side surface extending along an S-shaped curve and by the corresponding parts of the two curves being curved in the same direction and with the same radius of curvature.

The invention is described in the following by means of an example and reference to the accompanying drawings, in which Fig. 1 is a perspective view of an embodiment of a stone according to the invention, Fig. 2 is a plan view of the stone according to Fig. 1, Fig. 3 is a perspective view of a plurality of superimposed turns of stones according to Figs. 1 and 2, which form part of the lining of a metallurgical container, and Fig. 4 is a perspective view of three adjacent stones in one turn and shows the compensation of the wedge shape by turning the position of the middle stone.

Each stone shown 1 is made of refractory material and is delimited by an upper side 2, a lower side 3, an inner side 4, an outer side 5 and two opposite side surfaces 6 and 7. The upper side 2 and the lower side 3 are flat, parallel and identical. The inside 4 and the outside 5 have the same height but the inside 4 is narrower than the outside 5. The side surfaces 6 and 7 are not parallel to each other.

The inside 4 is offset in relation to the outside 5 parallel to the top 2 and the bottom 3. In other words, the center point 8 of the inside 4 is offset (more or less) from the normal from the center point 9 of the outside 5. Thus a straight line 10 is through the center points 8 and 9 8003074-5 obliquely towards the plane 4 of the inside and the outside 5 and not normal towards these planes. The upper side 2 and the lower side 3 are flat and form identical geometric figures, which are delimited by means of two different-length, parallel straight lines and two different curved segments, each of which has the shape of an S, which is symmetrical about its center, whereby S- the shapes have the corresponding curvature in the same direction and the same radii of curvature. Each side surface 6 or 7 thus forms a curved rectangular figure, which is curved in different directions on either side of the median line parallel to the mm sides.

It should be noted that in each particular case the choice of the angle of inclination of the straight line 10 in relation to the plane of the end faces 4 and 5 depends in particular on the distance between these surfaces 4 and 5, on the width of the surfaces 4 and 5 and on the local curvature of the metal casing against which the brick is to be laid.

During pressing, the brick can be provided with a piece of cardboard (not shown) on one of the side surfaces 6 or 7 and / or on the underside 3. The cardboard is placed on the underside and / or side surface in the mold that forms the brick, before the refractory material is filled. The carton allows the brick to expand without the risk of crack formation during the temperature rise in the lining.

With regard to a lining by means of the brick according to the invention, Fig. 3 shows the arrangement of stone according to the invention, the stones being coordinated in a plurality of successive turns. In this case, the straight line 10 (Fig. 2) is intentionally strongly oblique in relation to the radial direction from the metal casing (not shown), which runs through the geometric center of the stone 1.

Fig. 4 shows a detail of the lining on a larger scale and illustrates the compensation in wedge shape by means of the inverted position of a stone in the yard.

Claims (2)

1. 0 15 800307ë-5 L * Patent claim 1. stone consists of a block of refractory material, which delimits- Stone for lining a metallurgical container, which is said of partly identical, parallel upper and lower sides, partly an inside, partly an outer side which is wider than the inside and offset laterally relative thereto, and on the other hand two opposite side surfaces which are not parallel to each other, characterized in that each side surface (6, 7) extends along an S- shaped curve and that the corresponding parts of the two curves are curved in the same direction and with the same radius of curvature. 2. characterized in that the corner edges (11) between the inside (4) and one of the side surfaces (6 or 7) and between the outside (5) and the other side surface (7 or Stone according to claim 1, 6) are chamfered over their entire height.