JPS6237112Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention relates to an anchor for basic refractory material used to hold and fix basic monolithic refractory material constituting the inner wall of a furnace body to a frame. It is something.

(Prior art) In recent years, monolithic refractory materials mainly composed of magnesia, calcia, calcined dolomite, magurospinel, spinel, etc. have been used as refractory materials for rotary kilns, electric furnace ceilings, etc. Anchors used to hold and secure shaped refractory materials to frames have the following problems. In other words, iron-based metal anchors such as ordinary steel, mild steel, carbon steel, and stainless steel are oxidized when used at high temperatures, e.g., 500°C or higher, and are oxidized by magnesia and calcia, which are components of basic refractory materials. By reacting, for example, magnesio-ferrite,
Compounds such as calcium-ferrite are formed,
As a result, the metal anchor expands, becomes brittle, loses its metallic properties, and is no longer able to fulfill its original role of holding and fixing the fireproof material to the frame. In addition, brick anchors, which are used instead of the metal anchors mentioned above, are heavy and bulky, requiring troublesome work to attach to the frame, are limited in shape, and are susceptible to cracking due to temperature changes. It had drawbacks such as being easy to penetrate, insufficient in terms of strength, and high cost.

(Purpose of the invention) The present invention was completed with the aim of creating an anchor for basic fireproof materials that does not have the above-mentioned drawbacks.

(Structure of the invention) The present invention is characterized in that the part of the main body of the metal anchor that is embedded in the refractory material is covered with a base-resistant refractory material.

(Example) 1 is a metal anchor main body, and the anchor main body 1 is made of iron-based metal bar material such as ordinary steel, mild steel, carbon steel, stainless steel, etc., and is subjected to necessary processing such as bending processing, welding processing, etc. It is made into the required shape by applying
It consists of a mounting part 2 to the frame and a part 3 embedded in the refractory material connected from the mounting part 2 in a branch shape, hook shape, or other required shape suitable for holding an irregularly shaped refractory material. There is. 4 is the anchor main body 1
A base-resistant refractory coated on the entire part or the front part of the part 3 embedded in the refractory material,
A neutral or acidic refractory whose main component is alumina, silica, titania, zirconia or a combination thereof, or a neutral or weakly basic refractory which contains a small amount of spinel, magnesia, etc. These base-resistant refractories 4 are made by pouring the above-mentioned acidic or neutral refractory raw materials into the required parts of the anchor body 1, that is, the required parts to be embedded in the refractory material, and forming them into layers by patching or the like. After coating it, it is baked and integrated, or it is formed in advance into a desired shape and baked and then bonded and integrated. In addition, if the wall thickness of the base-resistant refractory 4 is too thin, the anchor body 1 may react with the basic refractory, and if it is too thick, the whole will become large and inconvenient to handle, so it should be about 2 to 30 mm. preferable.

In this configuration, the anchor body 1
are arranged at a required distance from each other by welding, screwing, or other means to the frame 11 with the mounting portion 2 at the base end thereof, thereby constructing the inner side of the frame 11 with a heat insulating material layer 12 interposed therebetween. A basic refractory material 13 such as magnesia, calcia, or calcined dolomite is held and fixed in a portion 3 embedded in the refractory material connected from the mounting portion 2, in substantially the same way as a conventional metal anchor. However, since the part 3 of the metal anchor main body 1 that is embedded in the refractory material is covered with a basic refractory material 4 in a layered manner, the relationship between the anchor main body 1 and the basic refractory material 13 is In addition to increasing adhesive strength, the basic refractory material 4 is a basic refractory material 13.
The anchor body 1 is completely covered with basic refractory material 13, including its mounting portion 2 and the portion 3 embedded in the refractory material.
Basic refractory material 13
Since the basic refractory material 13 does not fall off, it is possible to provide a highly durable furnace body, and it can be attached to the frame using the same method as conventional metal anchors, making it easy to install. can also be done very easily. In addition, stainless steel (SUS 309)
A Y with a height of 180 mm made of a bar with a wire diameter of 12 mm.
Leave only 30 mm of the base as the attachment part 2 on the main body 1 of the shaped anchor, and apply a putty-like base-resistant refractory material 4 made of 90% alumina, 5% silica, etc. to the surface of the part 3 to be embedded in the 150 mm refractory material. Prepare a large number of coated 10mm thick coated and fired pieces, and place them in the firing zone of a cement kiln with an inner diameter of 4.5mm (temperature 1400~
According to the results of an experiment in which the frames 11 were placed at 300 mm intervals by welding at 1500°C) and the inner walls of 200 mm thick made of amorphous basic refractory material 13 were constructed by pouring, 12 months have passed since then. Also, there was no deterioration of the anchor body 1 at all, and no falling off of the basic refractory material 13 was observed.

(Effects of the invention) As is clear from the above description, the anchor of this invention is mainly made of metal, so it can be handled in the same way as conventional metal anchors, and it can be attached to the frame by welding, bolting, etc. In addition, since part or all of the part of the anchor body that is embedded in the refractory material is coated with a basic refractory material, it can be easily carried out for a long period of time in an amorphous basic refractory material. Even if the anchor main body is oxidized by heating, the anchor main body will not directly touch the basic refractory material and the two components will not react, and the anchor main body will not become brittle due to erosion, but the anchor main body will not become brittle due to erosion. The bond between the basic refractory material that coats the main body and the components in the basic refractory material may be further strengthened by the solid solution that is formed by the reaction between the basic refractory material and the components in the basic refractory material. It has the advantage of being able to firmly hold and fix materials, has a simple structure and can be provided at low cost, and has extremely great practical value.

[Brief explanation of the drawing]

1, 2, and 3 are all partially cutaway front views showing embodiments of the present invention, and FIG. 4 is a partially cutaway front view of a kiln using the present invention. 1...metal anchor main body, 3...portion embedded in refractory material, 4...base-resistant refractory material.

Claims (1)

[Scope of utility model registration request] An anchor for basic refractory material, characterized in that the part of the main body of the metal anchor that is embedded in the refractory material is covered with a basic refractory material.