DE1056789B - Block made of refractory material for lining the masonry of metallurgical ovens - Google Patents

Description

For lining metallurgical furnaces, for example electric furnaces, are made of refractory Masses of stamped blocks of large dimensions known, according to the shape of the furnace part to which Lining they are intended to be made outside of the furnace. In the case of an electric furnace such blocks usually have the plan shape of a ring sector. After its completion within In a mold, they are freed from the latter and inserted into the oven using lifting equipment, for which purpose one equips them with a supporting structure which facilitates transport and which remains in the block. These Blocks are tamped in layers in the form in which this supporting and reinforcing structure was previously inserted was and show, as far as the refractory body is concerned, a more or less homogeneous nature in that they consist of one and the same rammed earth throughout.

It has already been proposed to manufacture such blocks in such a way that you have a plurality of commercially available refractory bricks or bricks layered one on top of the other to form a body of larger dimensions and by a lacing, for example consisting of a sheet metal band, to a transportable one Unity united.

. The present invention proposes a block made of refractory material for lining of the masonry of metallurgical furnaces, which is characterized in that the block body is preformed refractory Contains body made using a the spaces between the bodies filling embedding material are combined to form a large-format block unit. Yes one such block, the preformed refractory bodies are spaced apart, and the gaps between the preformed bodies are made of the refractory egg bed grout, which is also a ramming mass, filled out.

If it has been said earlier that the invention is a refractory block for lining the masonry is concerned, it should be made clear that the present blocks are neither intended nor suitable are to be inserted into the bottom of any metallurgical furnace or vessel. here za notice that kart soil is known that is made up of Düsera stones and a rammed earth are and to this extent represent a large-format refractory structure, which is preformed, refractory Body, which contains the nozzle stones which, using one, form the spaces between these nozzles atisfüllenden Einbettamgsmasse are combined into a large-format structure. Apart from that They also develop from the fact that such nozzles have numerous wind-reliable channels

existing block

for lining the masonry

of metallurgical furnaces

Applicant:

ίο Veitscher Magnesitwerke

Actien-Gesellschaft, Vienna

Representative: Dr.-Ing. F. Wuesthoff, Dipl.-Ing. G. Pulse
_1S and Dipl.-Chem. Dr. rer. nat. E. Frhr. v. Bad luck man,
Patent Attorneys, Munich 9, Schweigerstr. 2

Claimed priority:
Austria from December 28, 1955

Dipl.-Ing. Dr. Friedrich Honig, Vienna,
has been named as the inventor

Reasons of different manufacture, different uses and different behavior of one Converter bottom, compared to a block for lining the side wall of a vessel, not a model for such a latter block.

According to a further feature of the invention, the present refractory block consists of metal-clad refractory bodies which are known per se and are equally spaced apart from one another. It is advantageous if the longitudinal axes of the preformed body, for example the metal-sheathed body, run approximately perpendicular to the fire side of the block. It is also expedient if the end faces of the embedding bodies themselves extend as far as the fire-side delimitation of the block. In this case, parts of the metal envelopes of the embedded bodies reaching up to the outer surfaces of the block or approaching these surfaces can form points of application of a carrier used for transporting the block. The metal-sheathed bodies located within the block are expediently cylindrical in shape; refractory .Steine this type are known per se forth.

Due to the structure according to the invention, these 'large-format blocks, the following advantages are achieved; The staging of the block is simplified insofar as the stampiffing on the relatively small people

909 S09 / 201

Claims (3)

gen can be limited to embedding material, whereas the refractory material located within the sheet metal casing does not need to be covered by the tamping to be used when the block is performed, but is nevertheless securely and immovably embedded within the finished block. It is therefore expedient to use prefabricated refractory bricks because these bodies, which are usually only relatively small in size, can be given all those properties that can only be achieved with small brick dimensions. For example, it is also possible to use fired refractory bricks in this context, or bricks which meet certain requirements with regard to their behavior in operation, but which cannot be achieved when large-sized blocks are tamped; It is therefore possible to use preformed refractory bodies, as they can only be produced in a company set up for this purpose, in particular in a stone factory, and accordingly have properties that can only be achieved if such a company is present; However, these prerequisites are lacking in the production of the above-mentioned, homogeneous blocks, which is now customary. In the case of the use of metal-sheathed embedding bodies, the block according to the invention presents a structure which is abundantly and evenly interspersed with metal, which improves the behavior of the block in operation; The production of a block according to the invention is therefore more time-saving and simpler than the production of a homogeneous block, but nevertheless leads to blocks with properties which can be better adapted to the requirements of the individual case The drawing shows an embodiment of a block according to the invention in plan and elevation, the former in section along line II of FIG. 2 and the latter in an intermediate stage of manufacture, using cylindrical, metal-clad bodies 1, which, as is known per se, can remain part of the finished block and can be anchored in the block mass with claws (not shown). Instead, a grating made of iron bars, expanded metal or the like could also be used. Reference number 2 relates to the side walls of the mold. The ramming mass, in which the metal-clad, refractory bodies 3 are embedded, is denoted by 4. The refractory bricks are positioned so that their longitudinal axis is approximately perpendicular to the fire side of the finished block and, appropriately, at a small distance from one another. It is advantageous if the body 3 protrude on the front side up to close to the fire side of the block or even become part of the fire side. The distribution of the bodies 3 in the block is made, for example, such that the mean distance between the bodies is approximately equal to their diameter. The spaces between the bodies 3, the dimensioning of which is not critical, are filled with ramming mass. In the example shown, the holding rods 5 used to transport the blocks attack the base plate 1, but could also attack the metal sheaths, expediently those of the lowest layer. They could also be welded or otherwise connected to some higher-lying metal sheaths. Finally, it is also possible, as indicated by dashed lines at 6, to allow the rods to run obliquely in the block, their lower ends being curved and engaging under one or more of the embedded, preformed bodies 3. In order to facilitate the stacking of several rows of blocks, the support hooks 5, as is already known per se, end in troughs 7 which are filled with refractory mass as soon as the block is in place in the furnace. The dimensions of the sheathed bodies can vary within fairly large limits. For a block of approximate dimensions 1 × 1 × 0.45 m, for example, cylindrical bodies of the following dimensions could be used: outer diameter 200 mm, length 450 mm and sheet thickness 1 to 6 mm. As far as the ramming compound 4 is concerned, all compounds commonly used in this context are suitable for building up the block, namely dolomite, magnesite, magnesitic dolomite or dolomitic magnesite, and also magnesite mixed with cromite, but apart from these and other basic and neutral compounds, there are also Silica compounds into consideration. A suitable grain size must be adhered to. It is advisable to work with a binder; as such, tar is known to be particularly suitable, whereas binders with a high water content are generally less suitable because it is not desirable to have to reckon with longer drying times. At least it should be pointed out that the amount of the ramming mass is significantly smaller than that of the known homogeneous ramming blocks, so that shorter drying times are required if binders are used which dry with evaporation of liquid. With regard to the embedding body 3, the only requirement is that their refractory mass must be compatible with the ramming mass. The bond between the embedded bodies and the ramming mass fully satisfies the practical requirements even when the metal-sheathed bodies are involved. However, it is also possible to design the metal sheathing with outwardly protruding, bent-out lobes or claws, or to use a sheathing made of metal wire mesh, expanded material or the like. It will be understood that the invention is not limited to the manufacture of the illustrated lining blocks for cylindrical furnaces. In particular, according to the idea of the invention, blocks can also be produced which can be used in furnace ceilings or lids. Patent claims: 1. Block made of refractory material for lining the masonry of metallurgical Furnaces, characterized in that the block body contains preformed refractory bodies, using an embedding compound that fills the spaces between the bodies are combined into a large-format block unit. 2. Block according to claim 1, characterized in that the longitudinal axes of the preformed, within of the block lying perpendicular to the fire side of the block. 3. Block according to claim 2, characterized in that the fire side of the finished block un-