JP6834502B2 - Amorphous refractory structure, manufacturing method of amorphous refractory structure, and heat-resistant fiber support material - Google Patents

Description

The present invention relates to an amorphous refractory structure, a method for producing the same, and a heat-resistant fiber support material used for the amorphous refractory structure.

Various refractories such as refractory bricks, irregular refractories, and ceramic fibers are installed in various industrial furnaces and equipment used at high temperatures in steelworks, etc., depending on the usage environment and required functions. In recent years, the usage rate of amorphous refractories (castables, plastics, etc.) has been increasing due to the degree of freedom in construction and shape, and the improvement in quality.

Inside the amorphous refractory, a metal support usually called an anchor or stud, which is processed into an L-shape, V-shape, Y-shape, etc., is embedded, and the end of the metal support is an amorphous refractory. It is fixed to the iron skin or pipe that is the support of the object. This metal support material plays a role of preventing the amorphous refractory from peeling off and falling off from the iron skin, the pipe, etc., and suppressing the growth of cracks.

Further, a support material other than the metal support material may be used as the support material. As an example, it has been proposed to use a ceramic pin made of alumina, mullite, silicon carbide or the like as a support material (Patent Document 1).

Further, for the purpose of reducing the problems of cracking of the amorphous refractory and increase in heat loss caused by using the metal support material, Al ₂ O ₃ , SiO ₂ , Al ₂ O _{3- SiO 2} , Al ₂ O _3- SiO _2- B ₂ O ₃ It has been proposed to use an inorganic heat-resistant fiber support material as a support material (Patent Document 2).

The amorphous refractory structure is a structure composed of the above-mentioned amorphous refractory and a support material, and is a structure in which heat resistance and heat insulating properties are imparted to a support such as an iron skin or a pipe. Examples of the support include, in the steel process, a furnace shell of a heating furnace, a water-cooled pipe of a skid, a dipping pipe for secondary refining, a lance for gas blowing, and the like. Thousands to tens of thousands or even hundreds of thousands of supports can be made of iron skin, pipes, etc. by adhesive construction, manual welding, or semi-automatic welding, depending on the size and structure of the support used. It is fixed to the support and used.

Japanese Unexamined Patent Publication No. 10-197161 Japanese Unexamined Patent Publication No. 2014-145529

In a general amorphous refractory structure, a metal support is present near the working surface of the refractory exposed to high temperatures. Since metal has a higher coefficient of thermal expansion than refractories, the difference in expansion between the metal support and the amorphous refractory may cause cracks in the irregular refractory, and the thermal conductivity is high. In addition, there is a problem that a large heat loss occurs when heat escapes to a furnace shell iron skin, a water-cooled pipe, etc. through a metal support material. In addition, when the metal support material is used for a long period of time in an oxidizing atmosphere, the strength of the support material deteriorates due to the oxidation of the metal, and the holding power of the amorphous refractory decreases, especially from the tip of the support material. There was also a problem that the object peeled off.

Thousands to tens of thousands or even hundreds of thousands of metal supports are used in the construction of amorphous refractories in industrial furnaces, depending on the size and structure of the furnace.

When observing the amorphous refractory after operation at high temperature, it can be seen that cracks are often generated from the position where the metal support material is installed. The cracks grow and the individual pieces are connected, increasing the risk of peeling and falling off of the amorphous refractory. Therefore, the amount of cracks generated is one of the factors that determine the life of the amorphous refractory structure.

On the other hand, it has been proposed to use a ceramic pin as a support material instead of a metal support material (Patent Document 1). However, when the ceramic pin is used, there is a problem that it is difficult to fix the support material and the support because the ceramic pin cannot be welded to the support. In Patent Document 1, an inorganic adhesive is used as a fixing method, but since the inorganic adhesive has low adhesive strength, it cannot support a heavy object. Further, the ceramic pin has a drawback that it is easily broken. For these reasons, support materials made of ceramic pins are rarely used in reality.

Therefore, for the purpose of reducing the problems of cracking of the irregular refractory and increase in heat loss caused by using the metal support material, Al ₂ O ₃ , SiO ₂ , Al ₂ O _{3- SiO 2} , A rope-shaped support material made of heat-resistant fiber (heat-resistant fiber rope) made of inorganic long fibers such as _{Al 2} O _3- SiO _2- B ₂ O _{3 material has been proposed (Patent Document 2).} However, since the heat-resistant fiber support material has low fiber self-sustaining property, even if a curing agent is used, the heat-resistant fiber support material cannot withstand the load of the refractory material during construction of the amorphous refractory material, and the tip portion of the heat-resistant fiber support material. There was a drawback that it hung down.

The present invention has been made in view of the above circumstances, and is an amorphous refractory structure capable of improving the independence of the heat-resistant fiber support material, a method for producing the same, and a heat-resistant fiber used for the amorphous refractory structure. The purpose is to provide a support material.

In view of the above-mentioned drawbacks of the metal support material and the conventional heat-resistant fiber support material, the inventors of the present application have created the characteristics of the heat-resistant fiber by incorporating a metal wire as a core in the rope-shaped heat-resistant fiber support material. It was thought that it would be possible to improve the independence of the heat-resistant fiber support material and solve the problems that existed in the conventional heat-resistant fiber support material.

The coefficient of thermal expansion differs greatly between metals and oxides used in amorphous refractories, with metals generally taking larger values. Therefore, there is a difference in the amount of expansion between the metal support material and the amorphous refractory in the heat, and internal stress is generated when the metal is greatly extended, which is a major factor in the occurrence of cracks in the amorphous refractory. .. For this reason, in order to provide an expansion allowance for the metal support material, a resin coating or vinyl tape is wrapped around the surface of the support material and burned off when the temperature rises, so that the metal support material embedded in the irregular refractory It is enough to secure a space around.

On the other hand, the heat-resistant fiber is an inorganic material like the amorphous refractory, has a low coefficient of thermal expansion, and also has a low elastic modulus. Therefore, even if a heat-resistant fiber support material is embedded in the amorphous refractory, both of them Internal stress is less likely to occur due to the difference in expansion. Even if the metal wire is contained in the heat-resistant fiber support material, its expansion is restricted by the heat-resistant fiber support material, so that the amorphous refractory material is hardly affected.

Further, while the thermal conductivity of SUS steel and heat-resistant cast steel, which are usually used for metal support materials, is about 15 to 50 W / mK, the thermal conductivity of heat-resistant fibers typified by long alumina fibers Is about 0.1 W / mK. If you hold the end of the metal with your finger and bake the other with a flame, you will not be able to hold it immediately, but the difference is clear because you can continue to hold it even if you do the same with heat-resistant fiber. .. Even if a metal wire having a high thermal conductivity is contained in the heat-resistant fiber support material, the metal wire does not have a structure in contact with the support to which the heat-resistant fiber support material is connected, so that the heat is metal. It does not escape to the support through the wire and does not affect the heat loss.

Furthermore, since the heat-resistant fiber is mainly _{composed of oxides such as Al 2} O ₃ and SiO _2, it does not deteriorate due to oxidation even when used for a long period of time in a high-temperature oxidizing atmosphere, unlike metals. On the other hand, the metal wire contained in the heat-resistant fiber support material is deteriorated by oxidation. However, even if the metal wire is oxidized, it can maintain the strength several times that of the amorphous refractory, so that there is no problem at all.

That is, as a result of diligent studies by the inventors, by applying a support material in which a metal wire is embedded in the core of a heat-resistant fiber rope made of inorganic long fibers, it is possible to suppress the occurrence of cracks in an amorphous refractory and the support material. By reducing the amount of heat removed through the heat-resistant fiber support material and improving the independence of the heat-resistant fiber support material, it is possible to prevent the heat-resistant fiber support material from hanging down when constructing an amorphous refractory material. The present invention has been made by finding that the supporting effect is improved and the peeling wear of an irregular refractory material can be reduced when the actual machine is used.

The gist of the present invention is as follows.

(1) According to a certain viewpoint of the present invention, a support having an amorphous refractory and a vertical wall surface and supporting the amorphous refractory installed on the wall surface is connected to the wall surface of the support. The refractory fiber support material is provided with a heat-resistant fiber support material embedded inside the irregular refractory in a state of being formed, and the heat-resistant fiber support material has a heat-resistant fiber rope made of inorganic long fibers, and the heat-resistant fiber rope is The amorphous refractory has an annular portion and a metal wire is embedded in the core of the heat-resistant fiber rope, and the annular portion is self-supporting with respect to the wall surface of the support due to the elasticity of the metal wire. The self-supporting state is a state in which the annular portion does not bend or has little deflection in the state where the irregular refractory is constructed, and the said non-deflection or little deflection occurs. The state is a state obtained by using a heat-resistant fiber support material having a deflection amount of 6.04 mm or less when a load of 2N is applied to the tip of the annular portion, which is an amorphous refractory. The structure is provided.

( 2 ) The metal wire may be made of any one of a hard steel wire, a piano wire, and a stainless steel wire.

(3) the inorganic lengthy fibers, _Al 2 _{O 3} quality, SiO _{2 quality,} Al ₂ O 3 -SiO _{2 quality, Al 2 O 3 -SiO 2 -B} 2 O 3 1 , two or more of the quality It may be made of a material.

( 4 ) The heat-resistant fiber rope may be cured with a curing agent.

( 5 ) The heat-resistant fiber support material may have the heat-resistant fiber rope and a connecting member connecting the heat-resistant fiber rope and the support.

( 6 ) The connecting member may be made of a metal pipe fixed to the support, and may be brought into close contact with the heat-resistant fiber rope with the end portion inserted inside the metal pipe.

( 7 ) The direction in which the load of the irregular refractory material acts on the heat-resistant fiber rope may be different from the direction in which the end portion of the heat-resistant fiber rope is pulled out from the metal pipe.

( 8 ) The metal pipe may be fixed to the support by stud welding.

(9) According to another viewpoint of the present invention, in a method for producing an amorphous refractory structure including an amorphous refractory and a support supporting the amorphous refractory, heat-resistant fibers made of inorganic long fibers. A refractory fiber support material having a rope and a metal wire inside the core of the refractory fiber rope and having an annular portion of the refractory fiber rope is placed substantially perpendicular to the vertical wall surface of the support. In addition, the step of fixing the annular portion independently to the wall surface of the support by the elasticity of the metal wire, and the step of fixing the annular portion around the wall surface of the support to which the heat-resistant fiber support material is fixed. The self-supporting state includes a step of pouring an amorphous refractory into the construction, and the self-supporting state is a state in which the annular portion does not bend or has little deflection in the state where the amorphous refractory is constructed. The state of no bending or little bending means that the state can be obtained by using a refractory fiber support material having a bending amount of 6.04 mm or less when a load of 2N is applied to the tip of the annular portion. A method for producing an amorphous refractory structure is provided.

( 10 ) In the step of fixing the heat-resistant fiber support material to the wall surface of the support, the heat-resistant fiber support material may be fixed to the wall surface of the support by stud welding.

( 11 ) The heat-resistant fiber support material further has a metal tube fixed to the support, and is in close contact with the heat-resistant fiber rope with the end of the heat-resistant fiber rope inserted inside the metal tube. In the step of fixing the heat-resistant fiber support material to the wall surface of the support, the metal pipe of the heat-resistant fiber support material may be fixed to the wall surface of the support by stud welding.

( 12 ) The metal pipe has a thin-walled portion formed at the tip on the side fixed to the support, and the thin-walled portion of the metal pipe is fixed to the wall surface of the support by stud welding. You may.

(13) According to another aspect of the present invention, it is connected to the vertical wall surface of the support that supports the amorphous fireproof material and is embedded inside the amorphous fireproof material to be installed on the vertical wall surface of the support. The heat-resistant fiber support material is provided with a heat-resistant fiber rope made of inorganic long fibers and a connecting member for connecting the heat-resistant fiber rope and the wall surface of the support, and the heat-resistant fiber rope has an annular portion. A metal wire is contained in the core of the heat-resistant fiber rope, and the annular portion is self-supporting with respect to the wall surface of the support due to the elasticity of the metal wire. Is fixed to the wall surface and the amorphous fireproof material is installed, the annular portion is maintained in a state of no bending or little bending, and the said non-deflection or little bending is small. state, by using a heat-resistant textile support material which deflection amount is equal to or less than 6.04mm when the heat textile support material is by applying a load 2N at the tip of the annular portion in a state of being fixed to the wall surface A heat-resistant fiber support material is provided, which is in a obtained state.

( 14 ) The metal wire may be made of any one of a hard steel wire, a piano wire, and a stainless steel wire.

( 15 ) The connecting member may be made of a metal tube fixed to the support, and the end portion of the heat-resistant fiber rope may be inserted into the metal tube and may be in close contact with the metal tube.

( 16 ) The metal tube may have a thin-walled portion formed at the tip on the side fixed to the support.

By applying the present invention, it is possible to suppress the occurrence of cracks in the amorphous refractory caused by the metal support material, so that the durability of the amorphous refractory structure can be improved. Further, since the heat-resistant fiber support material has a low thermal conductivity, the heat loss from the amorphous refractory structure can be reduced.
Furthermore, by suppressing the sagging of the heat-resistant fiber support material when constructing the amorphous refractory material, the support effect of the amorphous refractory material by the heat-resistant fiber support material is improved, and the durability of the amorphous refractory material is improved. It is possible to raise it.
By the above effects, it is possible to contribute to cost reduction, energy saving, and improvement of the life of the amorphous refractory structure by reducing the heat loss energy.

It is a figure showing the support material made of heat-resistant fiber composed of the conventional heat-resistant fiber rope and a metal tube. It is a figure showing the support material made of heat-resistant fiber composed of the conventional heat-resistant fiber rope and a metal tube. It is a figure which shows the heat-resistant fiber support material composed of the heat-resistant fiber rope which inserted the metal wire which concerns on 1st Embodiment of this invention, and a metal tube. It is a figure showing the heat-resistant fiber support material composed of the heat-resistant fiber rope into which the metal wire which concerns on 2nd Embodiment of this invention is inserted, and a metal tube. It is a figure which shows the test for visually evaluating the deflection of the heat-resistant fiber support material at the time of pouring construction of an amorphous refractory. It is a figure which shows the method of measuring the amount of deflection by applying a load. It is a figure which shows the amount of deflection at the time of applying a load, and the amount of deflection at the time of releasing a load. It is a figure which shows the amorphous refractory support rate at the time of bending of the support material made of heat-resistant fiber. It is a figure which shows the tensile strength test of a heat-resistant fiber rope. It is a figure which shows the structure of the skid post to which the heat-resistant fiber support material which concerns on this embodiment is applied. It is a figure which shows the general amorphous refractory structure. It is a figure showing a general skid. It is a figure which shows the heat-resistant fiber support material which comprises the heat-resistant fiber rope which inserted the metal wire which concerns on 3rd Embodiment of this invention, and the metal tube for stud welding. It is a figure which shows the detail of the metal pipe for stud welding which concerns on 3rd Embodiment of this invention. It is a figure showing the heat-resistant fiber support material composed of the heat-resistant fiber rope into which the metal wire which concerns on 2nd Embodiment of this invention is inserted, and the metal tube of the shape different from FIG. It is a figure which shows the tensile strength test which evaluates the welding strength of a metal pipe. It is a figure which shows the structure of the skid post to which the heat-resistant fiber support material which concerns on 3rd Embodiment of this invention is applied.

The heat-resistant fiber support material according to the preferred embodiment of the present invention and the amorphous refractory structure using the same will be described in detail below with reference to the accompanying drawings. In the present specification and the drawings, components having substantially the same functional configuration are designated by the same reference numerals, so that duplicate description will be omitted.

Before explaining the amorphous refractory structure using the heat-resistant fiber support material according to the embodiment of the present invention, first, the amorphous refractory structure using the conventional metal support material will be described.

In general, as shown in FIG. 11, the amorphous refractory structure has, as a basic structure, a support 22 and a metal such as a metal stud or an anchor fixed to the support 22 by welding or the like. It is composed of a support material 23 and an amorphous refractory material 19.

Further, the refractory material covering the support 22 is composed of a single layer or a plurality of layers, and in addition to the amorphous refractory material 19, a standard refractory material such as a ceramic fiber, a heat insulating board, and a heat insulating sheet may be used in combination. The support 22 referred to here is a structure formed by combining members made of metal or ceramics, and examples thereof include a hearth, a pipe, a beam, and a pillar. For example, the support used in the steel process includes a furnace shell of a heating furnace, a water-cooled pipe provided in the post portion 25 of the skid as shown in FIG. 12, a dipping pipe for secondary refining, a lance for gas blowing, and the like. Can be mentioned.

Further, in the amorphous refractory structure, the metal support 23 is fixed to the support 22 at regular intervals by welding or the like, and then the amorphous refractory 19 is placed on a formwork of an arbitrary shape installed around the support. It is constructed by pouring, curing and drying, and after such construction, an amorphous refractory structure is used in the actual machine of each facility.

The heat-resistant fiber support material containing the metal wire according to the embodiment of the present invention replaces the metal support material 23 such as the metal studs and anchors. Further, the amorphous refractory structure according to the present embodiment is an amorphous refractory structure constructed by using a heat-resistant fiber support material containing the metal wire, and is generally described above except that the support material is different. The same configuration and application as the amorphous refractory structure can be applied. That is, the amorphous refractory structure according to the present embodiment is composed of a support, a heat-resistant fiber support material, and an amorphous refractory. In the present embodiment, the support has a vertical wall surface, and the heat-resistant fiber support material is attached to the vertical wall surface so as to stand upright in the horizontal direction, and an amorphous refractory is formed on the vertical wall surface. When it is constructed, it is preferably applied.

Here, the outline of the manufacturing method (construction method) of the amorphous refractory structure according to the present embodiment will be described. First, a plurality of heat-resistant fiber support members are fixed to the vertical wall surface of a support such as an iron door or a water-cooled pipe by welding at predetermined intervals. At this time, the heat-resistant fiber support material is fixed to the wall surface so that each heat-resistant fiber support material stands up substantially horizontally from the wall surface of the support. Next, an amorphous refractory is poured around the wall surface of the support for construction. For example, after installing a formwork of an arbitrary shape around the wall surface of a support to be covered with an amorphous refractory, the space between the formwork and the wall surface has fluidity and is an amorphous shape before solidification. Pour refractory material. Then, the amorphous refractory is cured and dried in the mold to solidify it. By pouring the amorphous refractory, the wall surface of the support is covered with the solidified amorphous refractory, and the heat-resistant fiber support material fixed to the wall of the support before the pouring is solidified amorphous. It is buried inside a refractory. As a result, the support can stably support the amorphous refractory through the heat-resistant fiber support material, and can prevent the amorphous refractory from peeling off from the support.

Further, the heat-resistant fiber used for the heat-resistant fiber support material is an inorganic long fiber having heat resistance, and for example, the constituent chemical components are Al ₂ O ₃ quality, SiO ₂ quality, and Al ₂ O. ₃ -SiO ₂ quality _is Al ₂ O ₃ -SiO 2 _-B 2 _{O 3} quality one or more of a long fiber (continuous fibers). The heat-resistant fiber has heat resistance and strength even at a high temperature of, for example, 600 ° C. or higher, and further 1000 ° C. or higher, which causes an increase in heat loss or a decrease in strength in a metal support material. If the material of the heat-resistant fiber is one or more of Al ₂ O ₃ quality, SiO ₂ quality, Al ₂ O ₃ −SiO ₂ quality, Al ₂ O ₃ −SiO ₂ −B ₂ O ₃ quality, It is preferable because it satisfies such heat resistance conditions. In particular, Al ₂ O _3- SiO ₂ quality is more preferable because it is excellent in high temperature resistance, cost performance and the like. Of Al ₂ O ₃ -SiO ₂ quality, _Al 2 _{O 3} is 72 wt%, heat resistance fiber composition SiO ₂ is 28 mass% is likely to get a good cost performance. Further, the heat-resistant fiber containing 90% by mass of _{Al 2} O _{3 and 10% by mass of SiO 2} is more excellent in heat resistance.

It is necessary that a plurality of these heat-resistant fibers can be twisted together to form a yarn, and a plurality of the yarns can be bundled and processed into a rope shape. As a result, the heat-resistant fiber rope, which is a main part of the heat-resistant fiber support material according to the present embodiment, is manufactured.

Further, as described above, two or more heat-resistant fibers of _{Al 2} O ₃ quality, SiO ₂ quality, Al ₂ O ₃ −SiO ₂ quality, and Al ₂ O ₃ −SiO ₂ −B ₂ O _{3 quality are used.} Then, if the heat-resistant fiber rope is manufactured, for example, a multi-layer structure can be formed in which the material is separated between the core and the outer layer of the heat-resistant fiber rope.

In addition, even with other materials, if a heat-resistant fiber rope is manufactured using heat-resistant fibers that can be made into a rope shape with inorganic long fibers, the heat-resistant fiber rope can be used in places where the temperature does not become too high. is there. For example, carbon _fiber, Al ₂ O ₃ -SiO ₂ -CaO matter is applicable to fibers such as CaO-SiO ₂ quality.

Hereinafter, an amorphous refractory structure using a heat-resistant fiber support 6 containing a metal wire 5 according to a preferred embodiment of the present invention will be described in detail with reference to FIGS. 3 to 10.

The heat-resistant fiber support member 6 in which the metal wire according to the present embodiment is contained is composed of the heat-resistant fiber rope 1, the metal wire 5 contained in the core of the heat-resistant fiber rope 1, and a connecting member (see FIG. 3). ). The connecting member has a function of connecting the heat-resistant fiber rope 1 and the support 22, and a metal pipe 2 or the like described later corresponds to this. The heat-resistant fiber rope 1 has a rope-like shape braided using the heat-resistant fibers. Examples of the type of braid include 8 strokes, 16 strokes, and Kongo strokes, but the type is not particularly limited. A hollow shape such as a sleeve can also be applied, but preferably one having as little space as possible in the rope is preferable.

In order for the heat-resistant fiber rope 1 to ensure the strength as a support material for the irregular refractory material 19, it is essential to use long fibers as the material of the heat-resistant fiber rope 1. Even when short fibers are used, it is possible to braid them into a rope shape, but the fibers are simply entangled and easily pulled out, so that they do not function as a support material. When long fibers are used, the tensile strength required as a support material can be adjusted by changing the rope diameter. The long fibers are those having a fiber length on the order of m (meters) or more (usually on the order of km (kilometers) or more), and are distinguished from short fibers having a fiber length of about 1 to 50 mm.

Since the heat-resistant fiber rope 1 has flexibility, the heat-resistant fiber rope 1 hangs down in the load direction under the load of the amorphous refractory 19 when the amorphous refractory 19 is constructed. There is a possibility of bending or bending. These phenomena reduce the support performance of the amorphous refractory material 19 by the heat-resistant fiber support material 6.

Therefore, in the heat-resistant fiber support material 6 according to the present embodiment, as shown in FIGS. 3 and 4, the metal wire 5 is embedded in the core of the heat-resistant fiber rope 1. The metal wire 5 is a metal wire having substantially the same length as the heat-resistant fiber rope 1. The metal wire 5 is inserted in the central portion (core) of the heat-resistant fiber rope 1 in the longitudinal direction. Since the periphery of the metal wire 5 is covered with the heat-resistant fiber rope 1, the metal wire 5 is not exposed to the outside.

By providing such a metal wire 5, the independence of the heat-resistant fiber rope 1 is improved. Further, even if a load is applied during the pouring of the irregular refractory material 19, the heat-resistant fiber rope 1 hardly hangs down and is perpendicular to the vertical wall surface of the support 22 (the annular portion surface is horizontal to the ground). Can be maintained in a stretched state. In the present invention, a state in which the amorphous refractory does not bend before construction and does not bend or has little bending after construction is referred to as an independent state. As a result, the support rate of the amorphous refractory 19 by the heat-resistant fiber support 6 is improved, and the peeling of the amorphous refractory 19 from the support 22 can be reduced when the actual machine is used.

Here, the approval rating will be described. FIG. 8 is a schematic view for explaining the support ratio of the amorphous refractory material 19 when the heat-resistant fiber support member 6 is bent. FIG. 8 shows a construction cross section, in which a heat-resistant fiber support 6 is connected to the leftmost support, and an amorphous refractory material 19 is constructed around the heat-resistant fiber support 6. When the construction thickness of the amorphous refractory 19 from the wall surface of the support at this time is B and the height of the heat-resistant fiber support 6 is A, the following formula (1) is defined as the support ratio.
Support rate = A / B (1)

Here, A is the actual height of the heat-resistant fiber support 6 after the construction of the amorphous refractory material 19 (horizontal distance from the wall surface of the support to the tip of the heat-resistant fiber rope 1 of the heat-resistant fiber support 6). That is, the support amount of the indefinite refractory is 17 (the range in which the indefinite refractory 19 can be supported by the heat-resistant fiber support member 6). The amorphous refractory support amount 17 varies depending on the degree of deflection of the heat-resistant fiber support member 6. When the thickness B of the amorphous refractory is constant, the unsupported amount 18 of the amorphous refractory changes due to the change of the supporting amount 17 of the amorphous refractory. The larger the unsupported amount 18 of the amorphous refractory, the more the amorphous refractory The peelability of 19 is enhanced. Conversely, the larger the support amount 17 of the amorphous refractory, that is, the larger the support ratio, the less the peeling of the amorphous refractory 19.

The upper limit of the support rate is determined by the construction thickness of the refractory material and the height of the heat-resistant fiber support material 6, and is not limited to a specific value. The larger the value, the smaller the peeling. It is an index.

As the material of the metal wire 5 used in the present embodiment, a copper wire, an aluminum wire, or the like can be used, but from the viewpoint of improving the elasticity of the metal wire 5, a hard steel wire, a piano wire, or stainless steel is used. Of the steel wires, it is preferable to use any material. This is because these hard steel wires, piano wires, or stainless steel wires are easily available, have relatively high elasticity, and have oxidation resistance.

More preferably, a stainless steel wire is used as the metal wire 5. Since the stainless steel wire has a high elastic modulus, even if the heat-resistant fiber support member 6 containing the stainless steel wire bends due to the load of the amorphous refractory material 19 when the amorphous refractory material 19 is poured, it returns after the construction. There is, and the approval rating can be increased. As shown in FIG. 7, the amount of deflection 16 of the heat-resistant fiber support member 8 flexed downward by the load is smaller when the load is released (see the broken line) than when the load is applied (see the solid line). Become. The higher the elastic modulus of the metal wire 5 contained in the heat-resistant fiber rope 1 of the heat-resistant fiber support member 6, the larger the return of the heat-resistant fiber rope 1 deformed by the load, so that the amount of deflection 16 at the time of releasing the load is small. Become.

Further, the diameter of the metal wire 5 is not particularly specified. If the deflection of the heat-resistant fiber support member 6 during the construction of an irregular refractory can be suppressed and the metal wire 5 can be contained in the core of the heat-resistant fiber rope 1, the diameter of the metal wire 5 is an appropriate diameter. You can. In general, the larger the diameter of the metal wire 5, the higher the resistance, but it does not have to be unnecessarily large. According to the inventor's examination, when a stainless steel wire is used, a diameter of the stainless steel wire of, for example, about 0.8 mm is sufficient.

The amount of deflection is proportional to the load and inversely proportional to the elastic modulus and the moment of inertia of area. In the case of a circle with a simple cross-sectional shape such as a straight wire, the moment of inertia of area is proportional to the fourth power of the diameter. Qualitatively, the higher the elastic modulus and the larger the diameter, the smaller the amount of deflection.

As described above, the amount of deflection (the amount of sagging) of the heat-resistant fiber support member 6 can be controlled by adjusting the material and diameter of the metal wire 5 contained in the heat-resistant fiber rope 1. Here, the amount of deflection of the heat-resistant fiber support member 6 should be as small as possible, and from the viewpoint of suppressing the amount of deflection, both the elastic modulus and the diameter of the metal wire 5 should be large. Therefore, for example, (a) the balance between the elastic coefficient of the metal wire 5 and the availability, workability, and economic efficiency of the metal wire 5, and (b) the load stress during the pouring of the amorphous fireproof material 19 By appropriately determining the material and diameter of the metal wire 5 according to the upper limit, (c) restrictions on the shape of the heat-resistant fiber rope 1 (for example, restrictions on the outer diameter of the rope), etc., the amorphous fireproof material 19 can be poured. The amount of deflection of the heat-resistant fiber support member 6 after construction may be adjusted so as to be equal to or less than a predetermined target upper limit value. The target upper limit of the amount of deflection of the heat-resistant fiber support 6 is a numerical value (for example, several [mm] to that does not hinder the peeling of the amorphous refractory in practical use of the amorphous refractory structure. It is preferable to set the level to a dozen [mm] as appropriate.

In the present embodiment, the heat-resistant fibers constituting the heat-resistant fiber rope 1 may be further cured with a curing agent in advance to improve the elasticity of the heat-resistant fiber rope 1 at room temperature (the elasticity referred to here is construction). It means that the heat-resistant fiber rope 1 can withstand deformation such as hanging, bending, or bending due to the load of the amorphous fireproof material 19). Examples of the curing agent include commercially available resins such as oil-based varnish that volatilize in the process of raising the temperature. By fixing the heat-resistant fiber rope 1 using a mold or the like and curing the heat-resistant fiber rope 1 with a curing agent, it is possible to mold the heat-resistant fiber rope 1 into an arbitrary shape.

In addition, phenolic resin that can be carbonized in the high temperature range to maintain strength, phosphoric acid, phosphate, silicate, silica sol, alumina sol, etc. that form a vitreous network in the high temperature range and coal tar pitch are used as curing agents. You may use it.

The heat-resistant fiber has a lot of space inside due to its structure, and can contain a lot of water. One of the factors that determines the quality accuracy of the amorphous refractory material 19 is the amount of added water. When the heat-resistant fiber is used, the moisture is absorbed by the heat-resistant fiber for the reason described above, and the amorphous refractory material 19 It may lose fluidity. Since the use of the curing agent has the effect of filling the space in the heat-resistant fiber, it also exerts the effect of preventing water from being contained in the heat-resistant fiber. Therefore, by using a curing agent, it is possible to carry out the construction without lowering the quality accuracy of the amorphous refractory material 19.

In the present embodiment, as shown in FIG. 3, both ends of the heat-resistant fiber rope 1 are connected by using a connecting member (for example, a metal tube 2) described later, and the annular heat-resistant fiber rope 1 is placed in the amorphous refractory material 19. By burying it, the amorphous refractory material 19 can be effectively supported. Further, the heat-resistant fiber rope 1 may be made into an annular shape as shown in FIG. Further, the number of the annular portions of the heat-resistant fiber rope 1 may be any number of two or more. For example, if the number of annular portions installed is two, the heat-resistant fiber rope 1 has a figure eight shape.

FIG. 10 shows the structure of a skid post as an example of the amorphous refractory structure according to the present embodiment. When the amorphous refractory structure according to the present embodiment is applied to various industrial furnaces and equipment, the heat-resistant fiber support member 6 is often fixed to the support 22 made of metal such as an iron skin or a water-cooled pipe 21. Considering workability and adhesive strength with the iron skin, as shown in FIG. 3 or 4, the heat-resistant fiber support member 6 includes the heat-resistant fiber rope 1 and a metal connecting member (for example, a metal pipe 2). It is preferable that the metal connecting member is welded to and fixed to a metal support 22 such as a water-cooled pipe 21. By fixing both ends of the heat-resistant fiber rope 1 to the support 22 with the connecting members made of a material that can be fixed to the support 22 by welding in this way, the heat-resistant fiber rope 1 Can be attached to the support 22.

The metal tube 2 shown in FIG. 3 or FIG. 4 is an annular metal member having a through hole inside, and can crimp the end portion of the heat-resistant fiber rope 1 inserted into the through hole of the metal tube 2. It is a thing. The metal pipe 2 can be easily welded and fixed to the support 22. The end portion of the heat-resistant fiber rope 1 is inserted into the inside of the metal tube 2 and pressed to crimp the heat-resistant fiber rope 1 and the metal tube 2 to form the crimping portion 3. In this way, even when a load or thermal stress is applied to the heat-resistant fiber support member 6 in the irregular refractory material 19, the end portion of the heat-resistant fiber rope 1 cannot be easily pulled out from the connecting member such as the metal tube 2. It is preferable to use the heat-resistant fiber support material 6 having a structure.

By forming the heat-resistant fiber rope 1 into an annular shape and providing an annular portion, the contact area with the amorphous refractory material 19 is increased, so that the frictional force between the irregular refractory material 19 and the heat-resistant fiber rope 1 is also increased, and the shape of the heat-resistant fiber rope 1 is increased. It also has the effect of increasing stability. The shape stability referred to here means that the heat-resistant fiber rope 1 is less deformed from the original shape during construction of the amorphous refractory material 19. Further, since the amorphous refractory material 19 exists straddling the annular heat-resistant fiber rope 1, the heat-resistant fiber rope 1 can receive the load of the irregular refractory material 19 on the surface and receives a larger load. It becomes possible.

Further, since the annular portion of the heat-resistant fiber rope 1 is provided and the metal wire 5 is inserted inside the annular portion of the heat-resistant fiber rope 1, the shape stability of the annular portion of the heat-resistant fiber rope 1 is further enhanced. Not only that, the independence of the entire annular portion of the heat-resistant fiber rope 1 is also enhanced. As a result, when the amorphous refractory material 19 is poured, the annular portion of the heat-resistant fiber rope 1 receives the load of the irregular refractory 19 on the surface, so that it is less likely to hang down and deform, and the metal wire is not easily deformed after the casting. Due to the elasticity of 5, the annular portion of the heat-resistant fiber rope 1 can be easily restored to the original horizontal state that is independent with respect to the vertical wall surface of the support 22.

After the heat-resistant fiber support member 6 is fixed to the support body 22, the amorphous refractory material 19 can be constructed in the same manner as the normal metal support material. If this method is used, the welding work is only performed in the same manner as that of a normal metal support material, so that the installation work efficiency of the support member is the same.

By the way, in the second embodiment shown in FIG. 4, at the connection portion of the heat-resistant fiber rope 1 with the metal pipe 2, the direction in which the load of the irregular refractory material 19 acts on the heat-resistant fiber rope 1 and the direction of the heat-resistant fiber rope 1 The direction in which the end portion is pulled out from the metal tube 2 is the same direction (vertical direction in the figure). On the other hand, in the first embodiment shown in FIG. 3, the direction in which the load of the irregular refractory 19 acts on the heat-resistant fiber rope 1 (vertical direction in the figure) and the end of the heat-resistant fiber rope 1 are metal pipes 2. The direction in which the fiber is pulled out (the left-right direction in the figure) is different. As a result, the end portion of the heat-resistant fiber rope 1 is less likely to come off from the metal tube 2, which leads to higher durability as a support material. Therefore, the heat-resistant fiber support material of FIG. 3 is more preferable.

Further, the heat-resistant fiber support material 6 containing the metal wire 5 according to the present embodiment may be used in combination with other conventional support materials. For example, when a heavy load of an amorphous refractory is applied to a support material such as a ceiling, a structure using a heat-resistant fiber support material in combination with a metal support material having a relatively high holding power or a hanger brick may be used. it can.

The heat-resistant fiber support material 6 containing the metal wire 5 according to the present embodiment and the amorphous refractory structure using the same are the conventional metal support material and the conventional metal support material in each industrial furnace and equipment. It can be applied to the place where the used amorphous refractory structure was applied. Further, the heat-resistant fiber support material 6 containing the metal wire 5 according to the present embodiment can be applied (in whole or in part) to a position where the metal support material has been conventionally used. .. In particular, when the support 22 is cooled by water cooling or air cooling, the heat-resistant fiber support 6 is effective because the heat loss from the furnace body is lower than that of the metal support.

An example of such equipment is a skid of a heating furnace for rolling steel pieces. A skid is a facility for supporting and transporting steel pieces in a heating furnace. The skid is made of a metal pipe, and the inside of the pipe is water-cooled for the purpose of maintaining hot strength, and the outer circumference is covered with a fire-resistant heat insulating material to suppress water cooling loss. At this time, if the water-cooled pipe is not insulated, the heat extracted from the heating furnace to the cooling water becomes large, resulting in a huge heat loss.

As shown in FIG. 12, the basic structure of the skid includes a beam portion 24 corresponding to a beam and a post portion 25 corresponding to a pillar. For example, in order to apply the amorphous refractory structure according to the present embodiment to the post portion 25, as shown in FIG. 10, a heat-resistant fiber support material is attached to the water-cooled pipe 21 which is the support 22 of the amorphous refractory 19. 6 may be welded, and an amorphous refractory material 19 may be poured around the water-cooled pipe 21 so as to wrap the heat-resistant fiber support member 6.

In the application example to the skid post shown in FIG. 10, a plurality of heat-resistant fiber support members 6 provided with heat-resistant fiber ropes 1 having an elliptical annular portion are arranged in the circumferential direction and the vertical direction of the water-cooled pipe 21 extending in the vertical direction. The heat-resistant fiber support members 6 are juxtaposed along the line at predetermined intervals, and are attached so as to project horizontally from the outer wall (vertical wall surface) of the water-cooled pipe 21. Here, the plurality of heat-resistant fiber support members 6 are installed along the circumferential direction and the vertical direction of the water-cooled pipe 21 so that the directions of the annular portions of the heat-resistant fiber rope 1 are alternately in the vertical direction or the horizontal direction. There is.

With such a structure, the amorphous refractory material 19 that covers the periphery of the water-cooled pipe 21 can be effectively supported by the plurality of heat-resistant fiber support members 6, and the amorphous refractory material 19 can be prevented from peeling off from the water-cooled pipe 21. Further, since the metal wire 5 is contained in the heat-resistant fiber rope 1, when the amorphous refractory material 19 is poured, the annular portion of the heat-resistant fiber rope 1 is formed by the elasticity of the metal wire 5 to form the amorphous refractory material 19. Since it tries to maintain an independent state with respect to the vertical wall surface of the water-cooled pipe 21 (an example of the support 22) against the load, it is possible to suppress the hanging of the annular heat-resistant fiber rope 1. Further, after the pouring work, the shape of the annular portion of the heat-resistant fiber rope 1 can be restored to the state before pouring by the elastic force of the metal wire 5. Therefore, after construction, the shape of the annular portion of the heat-resistant fiber rope 1 embedded in the amorphous refractory material 19 can be maintained in an appropriate shape, and the annular portion of the heat-resistant fiber rope 1 allows the amorphous refractory material 19 to have a high support rate. Can be supported more effectively.

The shape of the metal tube 2 for fixing the heat-resistant fiber rope 1 is not particularly limited, and may be a shape other than the metal tube 2 shown in FIGS. 3 or 4 above. In order to crimp the metal tube 2 to the heat-resistant fiber rope 1 and fix the heat-resistant fiber rope 1 with frictional resistance, the diameter of the metal tube 2 is, for example, about 10 to 17 mm. If the metal tube 2 is significantly larger than the diameter of the heat-resistant fiber rope 1, the heat-resistant fiber rope 1 may come off from the metal tube 2 or be crimped when the end of the heat-resistant fiber rope 1 is inserted into the metal tube 2 and pressed. It may deviate from 3. Further, if the crimping deformation of the metal pipe 2 is large, it becomes difficult to fix the metal pipe 2 to the support 22.

The length of the metal tube 2 is, for example, about 20 to 30 mm. If the metal pipe 2 is too short, the welded portions of the heat-resistant fiber rope 1 and the metal pipe 2 other than the crimping portion 3 are deformed. Further, if the metal tube 2 is too long, the water cooling loss becomes large and heat loss occurs.

Next, with reference to FIGS. 13 to 15, a heat-resistant fiber support material 27 having a metal tube 2 on which a thin-walled portion 26 for stud welding according to a third embodiment of the present invention is formed, and the heat-resistant material. A method of manufacturing an amorphous refractory structure using the fiber support member 27 will be described.

Conventionally, the heat-resistant fiber support material has also been fixed to the support body 22 such as an iron skin or a pipe by manual welding or semi-automatic welding in the same manner as the metal support material. Therefore, there is a problem that it takes time to install the heat-resistant fiber support material.

Therefore, the inventors of the present application have diligently studied in order to shorten the installation time of the heat-resistant fiber support material, and have come to apply the stud welding construction. When, for example, SS steel or SUS steel is used as the metal pipe 2 to which the heat-resistant fiber rope 1 is fixed, the metal pipe 2 made of these materials is directly welded to a support 22 such as an iron skin or a water-cooled pipe 21 by stud welding. be able to. Further, in stud welding, the shape of the tip of the member to be welded is important for heating by electric resistance, but by processing the tip of the metal pipe 2, it can be adjusted to an appropriate shape that facilitates stud welding. The fixing of the heat-resistant fiber rope 1 by the metal tube 2 is not affected, and the heat-resistant fiber support material can be installed in a short time. In the following third embodiment, the structure of the heat-resistant fiber support material capable of shortening the installation time on the support 22 and the method of fixing the heat-resistant fiber support material to the support 22 by stud welding will be described.

13 and 14 show a heat-resistant fiber support material 27 provided with a metal tube 2 on which a thin-walled portion 26 for stud welding according to a third embodiment of the present invention is formed. FIG. 15 shows a heat-resistant fiber support member 28 provided with a metal tube 2 in which the thin-walled portion 26 is not formed.

13 to 15 show a crimping portion 3 formed around the metal pipe 2 by caulking. By crimping the outer circumference of the metal pipe 2, the end portion of the heat-resistant fiber rope 1 inserted inside the metal pipe 2 is crimped to the metal pipe 2, and the joint portion between the metal pipe 2 and the end portion of the heat-resistant fiber rope 1 is crimped. Is firmly fixed. The position, number, shape, etc. of the caulking are not particularly specified as long as the heat-resistant fiber rope 1 is crimped to the metal pipe 2 without coming off. The heat-resistant fiber support members 27 and 28 of FIGS. 13 to 15 are examples in which the metal tube 2 is crimped at two positions in the tube axial direction to provide two annular crimping portions 3.

Further, stud welding is performed on the tip of the metal pipe 2 of the heat-resistant fiber support member 27 for stud welding shown in FIGS. 13 and 14 (the end on the side fixed to the water-cooled pipe 21 which is an example of the support 22). A thin-walled portion 26 for use is formed. The thin-walled portion 26 is an annular portion formed at the tip of the metal pipe 2 for fixing the heat-resistant fiber rope 1 and having a thinner wall thickness than the other portion (outer diameter G) of the metal pipe 2. The thin-walled portion 26 is provided to facilitate melting of the tip of the metal pipe 2 that fixes the heat-resistant fiber rope 1 during stud welding, and functions as a welded portion that melts during stud welding. Since the material of the metal pipe 2 is, for example, SS steel or SUS steel, the thin portion 26 of the same material is suitably melted by stud welding and melts with the metal support 22.

The thin-walled portion 26 is formed by processing the tip of the metal tube 2 by cutting or the like to make the thin-walled portion 26 thinner than the other parts of the metal tube 2. For example, as shown in FIG. 14, by cutting the outer peripheral portion of the tip of the metal pipe 2 to which the heat-resistant fiber rope 1 is fixed to make it thinner, the portion other than the tip of the metal pipe 2 (outer diameter G) is compared. A thin portion 26 having a wall thickness of, for example, about one-third may be formed on the inner peripheral side of the metal tube 2. However, the method of forming the thin-walled portion 26 is not limited to such an example, and for example, the inner peripheral side of the tip of the metal tube 2 may be cut to form the thin-walled portion 26 on the outer peripheral side. Alternatively, the thin portion 26 may be formed in the central portion in the radial direction by cutting both the outer peripheral side and the inner peripheral side of the tip of the metal tube 2. Alternatively, the tip of the metal tube 2 may be machined to form a tapered shape.

Further, the size of the thin-walled portion 26 may be the size in which penetration at the time of welding is most preferable. For example, the wall thickness D and height H of the thin wall portion 26 may be adjusted to such an extent that the thin wall portion 26 is suitably melted by electric resistance heating during stud welding.

By providing the thin portion 26 at the tip of the metal tube 2 as described above, the tip of the metal tube 2 can be adjusted to an appropriate shape that facilitates stud welding. As a result, when the metal tube 2 is stud welded to the support 22, the thin portion 26 can be suitably melted by electric resistance heating, the tip of the metal tube 2 can be firmly fixed to the support 22, and the metal can be stud welded. The welding work time of the pipe 2 can be significantly shortened. Therefore, a large number of heat-resistant fiber support members 27 can be installed on the support 22 in a short time, and the installation time of the support materials can be significantly shortened. Further, even if the thin portion 26 is formed on the metal tube 2, the fixing of the end portion of the heat-resistant fiber rope 1 by the metal tube 2 is not affected.

Further, when the heat-resistant fiber support member 27 is fixed to the metal support 22 by normal arc welding or the like, there is a problem that the caulking strength of the heat-resistant fiber rope 1 is lowered by the heat during welding. is there. However, in the present embodiment, since the heat-resistant fiber support member 27 is fixed to the metal support 22 by using stud welding that can be fixed in a short time, the caulking strength of the heat-resistant fiber rope 1 during welding is reduced. The adverse effects of heat can be reduced, such as by suppressing it.

Further, the conventional metal support material has a rod shape, and in order to increase the electric resistance value at the time of stud welding, the welded portion at the tip of the metal support material must have a spire shape or a considerably small diameter. However, in the case of the metal pipe 2 of the heat-resistant fiber support member 27 according to the third embodiment, the thin-walled portion 26, which is a welded portion, can be relatively easily manufactured by cutting to reduce the pipe diameter at the tip thereof. It is possible.

Further, when the metal pipe 2 is stud welded to the metal support 22, another member such as a pin for stud welding may be attached to the tip of the metal pipe 2 by welding or the like. However, in this method, after crimping the rope portion of the heat-resistant fiber rope 1 and the metal portion of the metal pipe 2 (for example, after crimping the metal pipe 2 to form the crimping portion 3), the metal pipe 2 is used for stud welding. When welding another member such as a pin, there is a problem that the caulking strength of the heat-resistant fiber rope 1 is affected by the heat during welding as described above. Further, even if stud welding having a small heat effect is adopted as a method of attaching another member such as a pin for stud welding to the metal pipe 2, mounting failure is likely to occur when the other member is attached to the metal pipe 2. There is also the problem. Further, in order to avoid the above-mentioned problems of heat effect and improper mounting, another member such as a pin for stud welding is attached to the tip of the metal pipe 2 in advance, and then the end of the heat-resistant fiber rope 1 is inserted into the metal pipe 2. A method of manufacturing a heat-resistant fiber support material by crimping to form the crimping portion 3 is also conceivable. However, even with the heat-resistant fiber support material manufactured in this way, since there are many metal parts such as the metal pipe 2 and the pin, heat is removed from the support 22 to the heat-resistant fiber support material through the metal parts after construction. There is a problem that the number increases.

On the other hand, in the heat-resistant fiber support material 27 according to the third embodiment of the present invention, the thin-walled portion 26 for stud welding is thinned by cutting or the like at the tip of the metal pipe 2 before crimping. It is formed in advance, and the metal tube 2 and the thin-walled portion 26 are integrated. As a result, the step of attaching the pin for stud welding to the metal pipe 2 is unnecessary, and there is an effect that an attachment defect does not occur. Further, by forming a thin portion 26 in advance that enables simple and reliable stud welding, the metal portion in the heat-resistant fiber support material 27 can be minimized, so that heat is removed from the support 22 to the heat-resistant fiber support material. Can be suppressed, and the influence of heat during stud welding can also be reduced.

Hereinafter, the heat-resistant fiber support material and the amorphous refractory structure according to the examples of the present invention will be described in detail. The present invention is not limited to the following examples.

As the heat-resistant fiber, a long fiber having a composition of 72% by mass _{of Al 2} O _{3 and 28% by mass of SiO 2 was used as a yarn.} Using this yarn, a metal wire 5 having a diameter of 0.8 mm was inserted into a heat-resistant fiber rope 1 having a diameter of 5 mm and braided.

(Test Example 1)
As shown in FIG. 3, the other end of the heat-resistant fiber rope 1 into which the metal wire 5 is inserted is made annular, and the end is made of SUS steel and has a height of 20 mm and an inner diameter of 10 mm. By putting it in (corresponding to a connecting member) and pressing it, the rope part of the heat-resistant fiber rope 1 and the metal part of the metal tube 2 are crimped, and the heat-resistant fiber support in which the metal wire 5 is inserted in the heat-resistant fiber rope 1 Material 6 was manufactured.

As shown in FIG. 5, the heat-resistant fiber support member 6 into which the metal wire 5 made of SUS steel or SS steel is inserted is welded to the channel steel 11 at a pitch of 125 mm (D) in length, 120 mm (B) in width and 110 mm in thickness. (A), a pouring construction test was conducted using glycerin 13 having a height of 400 mm (C) and a specific gravity of 1.3 g / cm ³ equivalent to that of an amorphous refractory material, and heat resistance immediately after pouring and 20 minutes after pouring. The amount of vertical deflection of the heat-resistant fiber rope 1 of the fiber support member 6 was measured.

At this time, the heights of the support members 6 of the examples of the present invention were all 80 mm (E), and the shapes of the heat-resistant fiber support members 6 were tested with two types of FIGS. 3 and 4.

Further, for comparison, the same construction test was carried out under the same conditions using the heat-resistant fiber support material 4 having a diameter of 5 mm, which does not include the metal wire 5 shown in FIGS. 1 and 2.

The test results are shown in Table 1.
When the heat-resistant fiber support material 6 having the shape shown in FIG. 3 is used, the amount of deflection of the heat-resistant fiber support material 6 into which the metal wire 5 made of SUS is inserted immediately after the pouring operation is shown in Examples 1 to 3. As shown, the maximum is 5 mm, and the amount of deflection of the heat-resistant fiber support member 6 into which the metal wire 5 made of SS steel of Invention Example 4 is inserted is up to 8 mm, whereas the heat resistance of Comparative Example 1 is high. The fiber support member 4 had a maximum deflection amount of 30 mm.

Further, as a result of measuring the amount of deflection 20 minutes after the pouring operation, the heat-resistant fiber support material 6 (SS steel metal wire 5) of Invention Example 4 was 8 mm, and the heat-resistant fiber support material 4 of Comparative Example 1 was used. In the case of, it was 27 mm, whereas in the case of the heat-resistant fiber support member 6 (metal wire 5 made of SUS steel) of Invention Example 3, it was 0 mm.

In Example 3 of the present invention, when the glycerin 13 was poured, the glycerin 13 hit the tip of the heat-resistant fiber support member 6, and the heat-resistant fiber support member 6 was bent. However, the elasticity of the metal wire 5 made of SUS steel caused the heat-resistant fiber. It was confirmed that the deflection of the support material 6 was restored.

Therefore, when the heat-resistant fiber support material 6 having the shape shown in FIG. 3 is used, the heat-resistant fiber support material 6 into which the metal wire 5, preferably the metal wire 5 made of SUS steel is inserted is used. It was confirmed that the function as a support material for the irregular refractory construction body can be stabilized.

Further, in the same manner as described above, a construction test was conducted using the heat-resistant fiber support material 6 having the shape shown in FIG. As a result, as shown in Invention Examples 5 to 7, the amount of deflection of the heat-resistant fiber support member 6 into which the metal wire 5 made of SUS steel is inserted is 5 mm at the maximum immediately after the pouring operation, and the SS steel of Invention Example 8 is used. The heat-resistant fiber support member 6 into which the metal wire 5 was inserted had a maximum deflection amount of 6 mm, whereas the heat-resistant fiber support member 4 of Comparative Example 2 had a maximum deflection amount of 15 mm.

Further, as a result of measuring the amount of deflection 20 minutes after the pouring operation, the heat-resistant fiber support material 6 (SS steel metal wire 5) of Invention Example 8 was 6 mm, and the heat-resistant fiber support material 4 of Comparative Example 2 was used. In the case of, it was 15 mm, whereas in the case of the heat-resistant fiber support member 6 (metal wire 5 made of SUS steel) of Invention Examples 5 to 7, it was 4 mm. Similar to the test in the case of using the heat-resistant fiber support material 6 having the shape shown in FIG. 3, in Invention Example 3, the glycerin 13 hits the tip of the heat-resistant fiber support material 6 when the glycerin 13 is poured, and is made of heat-resistant fiber. Although the support member 6 was bent, it was confirmed that the elasticity of the metal wire 5 made of SUS metal steel returned the deflection of the heat-resistant fiber support member 6.

Therefore, even when the heat-resistant fiber support material 6 having the shape shown in FIG. 4 is used, the heat-resistant fiber support material 6 into which the metal wire 5, preferably the metal wire 5 made of SUS steel is inserted can be used. It was confirmed that the function as a support material for the irregular refractory construction body can be stabilized.

(Test Example 2)
In the actual machine, when the amorphous refractory is poured, the irregular refractory hits the tip of the heat-resistant fiber support 6 and the heat-resistant fiber support 6 bends. Therefore, as shown in FIG. 6, the heat-resistant fiber support A test was conducted in which a constant load of 2N was applied to the tip of the material 6.

The metal wire diameter at this time was φ0.5 to 0.8 mm.
Further, for comparison, a similar load application test was carried out under the same conditions using a heat-resistant fiber support material 4 having a diameter of 5 mm and which does not contain the metal wire 5 as shown in FIGS. 1 and 2. At this time, the heights of the support material 6 of the present invention example and the support material 4 of the comparative example are all 80 mm (E) (see FIGS. 1 to 4), and the shapes of the heat-resistant fiber support material 4 are shown in FIGS. 1 and 2. Two types of tests were conducted.

The test results are shown in Table 1.
As shown in Invention Examples 1 to 4, the amount of deflection of the heat-resistant fiber support member 6 into which the metal wire 5 made of SUS steel having the shape shown in FIG. 3 is inserted is 6.04 mm and φ0.6 mm in φ0.5 mm. The amount of deflection of the heat-resistant fiber support member 6 into which the metal wire 5 made of SS steel of Invention Example 4 is inserted is 4.93 mm and 3.18 mm at φ0.8 mm, and is 4.8 mm at φ0.8 mm. On the other hand, the amount of deflection of the heat-resistant fiber support member 4 of Comparative Example 1 was 10.86 mm.

Therefore, when the heat-resistant fiber support material 6 having the shape shown in FIG. 3 is used, the heat-resistant fiber support material 6 into which the metal wire 5, preferably the metal wire 5 made of SUS steel is inserted is used. It was confirmed that the deflection of the heat-resistant fiber support material 6 that occurs when the amorphous refractory material is poured is reduced, and the function of the amorphous refractory structure as a support material can be stabilized.

Similarly, the amount of deflection of the heat-resistant fiber support member 6 (metal wire 5 made of SUS steel) having the shape shown in FIG. 4 is 2.54 mm and φ0.6 mm at φ0.5 mm, as shown in Invention Examples 5 to 7. The amount of deflection of the heat-resistant fiber support member 6 (metal wire 5 made of SS steel) of Invention Example 8 was 1.8 mm at φ0.8 mm, which was 1.56 mm and 1.38 mm at φ0.8 mm. On the other hand, the heat-resistant fiber support material of Comparative Example 2 was 6.66 mm.

Therefore, even when the heat-resistant fiber support material 6 having the shape shown in FIG. 4 is used, the heat-resistant fiber support material 6 into which the metal wire 5, preferably the metal wire 5 made of SUS steel is inserted can be used. It was confirmed that the deflection of the heat-resistant fiber support member 6 generated when the amorphous refractory was poured was reduced, and the function of the amorphous refractory structure as a support could be stabilized.

(Test Example 3)
The heat-resistant fiber support material 6 is placed in a high-temperature environment during actual use and gradually deteriorates, the heat-resistant fiber rope 1 and the metal wire 5 are broken, and the amorphous fireproof material is peeled off. As an example of the present invention, a heat-resistant fiber rope 1 (including a metal wire 5) that has been heat-treated was used to perform a tensile strength test as shown in FIG. 9, and the durability of the heat-resistant fiber support member 6 was evaluated. The test conditions were a metal wire diameter made of SUS steel of φ0.5 to 0.8 mm, and the firing conditions were 1000 ° C. × 10 hours and 1200 ° C. × 10 hours.

Further, as a comparative example, a tensile test was conducted by performing the same firing on a heat-resistant fiber rope having a diameter of 5 mm and not containing the metal wire 5. At this time, the test was conducted with the rope lengths of the examples of the present invention and the comparative examples being all 200 mm. In the case of this comparative example (without metal wire), the core of the wire is clogged with heat-resistant fiber instead of the metal wire 5.

The test results are shown in Table 2.
As shown in Table 2, in the example of the present invention, since the metal wire 5 in the heat-resistant fiber rope 1 is oxidized in a high-temperature environment, the tensile strength of the entire support material is slightly higher than that of the comparative example consisting of only heat-resistant fibers. It is declining. However, the tensile strength of the heat-resistant fiber rope 1 into which the metal wire 5 made of SUS is inserted is about 3.1 to 3.4 kN in the case of the tensile strength test at 1000 ° C., and the heat resistance does not include the metal wire 5. Tensile strength of fiber rope: There is no big difference with 3.5kN. The tensile strength of the heat-resistant fiber rope after firing at 1200 ° C. for 10 hours was 0.9 kN at φ0.5 mm, 0.8 kN at φ0.6 mm, and 0.6 kN at φ0.8 mm, but it is used in the actual machine. It was confirmed that it can be sufficiently used in the actual machine because it maintains the strength higher than the generated stress of the amorphous refractory.

(Test Example 4)
As shown in FIG. 10, a test was conducted in which the water-cooled pipe 21 of a heating furnace skid post having an operating temperature of 1350 ° C. was applied to measure the amount of peeling of an amorphous refractory.

As shown in Table 1, as Invention Examples 3 and 4, the heat-resistant fiber rope 1 is made annular, a metal wire 5 made of φ0.8 SUS steel or SS steel is inserted, and the end portion is made of SUS steel. The rope portion and the metal portion were crimped by putting them in a metal tube 2 having a diameter of 20 mm and an inner diameter of 10 mm and pressing them to produce a heat-resistant fiber support member 6 into which the metal wire 5 in the form shown in FIG. 3 was inserted. Further, as Invention Examples 7 and 8, similarly, the heat-resistant fiber support member 6 into which the metal wire 5 in the form shown in FIG. 4 was inserted was manufactured.

Further, as shown in FIG. 10, eight heat-resistant fiber support members 6 are arranged in the circumferential direction, the height-wise spacing of the heat-resistant fiber support members 6 is 150 mm, and the heat-resistant fiber support members 6 are water-cooled pipes. It was welded and fixed to 21. In the example of FIG. 10, the heat-resistant fiber support members 6 arranged in the circumferential direction are arranged in the direction (left-right direction) in which the load of the irregular fire-resistant material 19 acts on the heat-resistant fiber rope 1. 6 and the support member 6 arranged in the direction in which the heat-resistant fiber rope 1 is pulled out from the metal tube 2 (vertical direction) are alternately arranged by four. The arrangement is such that the directional surfaces of the annular portion of the heat-resistant fiber rope 1 do not overlap in the height direction. A water-cooled pipe 21 to which a heat-resistant fiber support member 6 was welded was poured into a water-cooled pipe 21 with an amorphous refractory material 19 having a thickness of 110 mm.

Further, as Comparative Examples 1 and 2, a water-cooled pipe using the heat-resistant fiber support material 4 which does not contain the metal wire 5 shown in FIGS. 1 and 2 was manufactured under the same conditions. At this time, the heights of the support materials of Examples 3, 4, 7, 8 of the present invention and Comparative Examples 1 and 2 were all set to 80 mm.

After operating the heating furnace at an operating temperature of 1350 ° C. for 6 months, the state of wear of the amorphous refractory material 19 was confirmed.

As a result, as shown in Table 1 above, in Comparative Example 1 using the heat-resistant fiber support material 4 of FIG. 1, peeling of the 12 mm amorphous refractory material 19 was confirmed. On the other hand, in Invention Examples 3 and 4 using the heat-resistant fiber support member 6 into which the metal wire 5 of FIG. 3 having the same shape as that of FIG. 1 is inserted, the peeling amount of the amorphous refractory 19 is 0 mm, respectively. It was 3 mm, and the amount of peeling was significantly smaller than that of Comparative Example 1.

Further, in Comparative Example 2 using the heat-resistant fiber support material 4 of FIG. 2, peeling of the 3 mm amorphous refractory material 19 was confirmed. On the other hand, in Invention Examples 7 and 8 using the heat-resistant fiber support member 6 into which the metal wire 5 of FIG. 4 having the same shape as that of FIG. 2 is inserted, the peeling amount of the amorphous refractory 19 is 0 mm. The peeling of the amorphous refractory 19 could be completely prevented.

(Test Example 5)
As shown in FIG. 13, the heat-resistant fiber rope 1 is made into an annular shape, both ends thereof are put into a metal pipe 2 made of SUS steel or SS steel, and pressed to crimp the end portion of the heat-resistant fiber rope 1 to the metal pipe 2. The heat-resistant fiber support material 27 for stud welding was manufactured. FIG. 14 shows a dimensional example of the metal pipe 2, where the height F of the metal pipe 2 is 22 mm, the outer diameter G is 13.8 mm, the height H of the thin-walled portion 26 which is the welded portion is 0.8 mm, and the thin-walled portion. The wall thickness D of 26 was set to 0.4 mm.

In order to search for preferable conditions under which the metal pipe 2 can be firmly stud welded to the water-cooled pipe, the height H of the thin portion 26 is 0.8 mm, 1.0 mm, and 1.2 mm, which are three types of heat-resistant fiber supports for stud welding. The material 27 was manufactured, and a stud welding construction test was conducted under the conditions of voltages of 130V, 140V, 150V, 160V, 170V, and 180V.

The test results are shown in Table 3. Regarding the evaluation of weldability in Table 3, ⊚ showed excellent penetration, and the nugget (melting portion) melted out in a circle around the metal pipe 2 after welding. ◯ indicates good penetration, and the nugget (melting portion) melted out in an elliptical shape around the metal pipe 2 after welding. Δ indicates insufficient penetration, and the nugget (melting portion) did not melt out from the metal pipe 2 after welding. According to this test result, when a metal tube 2 having a height H: 0.8 mm of a thin wall portion 26 made of SUS steel is welded at 140 V, the thin wall portion 26 at the tip of the metal tube 2 has the best penetration. The result was obtained. From the results in Table 3, in order to properly weld the metal pipe 2 to the support 22, the material of the metal pipe 2 is preferably SUS steel rather than SS steel, and the welding voltage is 130 V or more. It is preferably 160 V or less, and more preferably 140 V or less.

(Test Example 6)
Insufficient construction strength of the heat-resistant fiber support material causes the welded portion of the heat-resistant fiber support material to break during actual use, causing the irregular refractory to fall off. Therefore, in the stud welding construction test conducted in Test Example 5. A tensile strength test as shown in FIG. 16 was performed using the sample of the metal tube 2 to evaluate the welding strength. The test conditions were a tensile speed of 100 mm / min at room temperature.

The test results are shown in Table 4. As a result, when the height H of the thin portion 26 of the SUS steel is 0.8 mm and the welding voltage is 130 V, the tensile strength is 22 kN, and the height H of the thin portion 26 is 0.8 mm and the welding voltage is 140 V. In the case of, the tensile strength was 24 kN, and in each case, high strength was exhibited. In general appearance, the tensile strength was high when the thin-walled portion 26 was preferably blended.

The heat-resistant fiber rope 1 has a tensile strength of about 3 kN at room temperature, and has a safety factor of 7 times or more based on the tensile test results in Table 4. Furthermore, since the strength equal to or higher than the generated stress of the amorphous refractory material 19 used in the actual machine is maintained, it was confirmed that the heat-resistant fiber support material 27 can be sufficiently used in the actual machine.

(Test Example 7)
As shown in FIG. 17, a heat-resistant fiber support material 27 for stud welding using a metal pipe 2 made of SUS steel was applied to a water-cooled pipe 21 of a heating furnace skid post having an operating temperature of 1300 ° C. The arrangement of the heat-resistant fiber support members 27 was eight in the circumferential direction, the intervals in the height direction were 120 mm, and 120 heat-resistant fiber support members 27 were stud welded to the water-cooled pipe 21. The thickness of the amorphous refractory 19 was set to 110 mm, and the work was carried out. Further, for comparison, the heat-resistant fiber support member 28 shown in FIG. 15 was similarly constructed by hand welding. At this time, the heights F of the heat-resistant fiber support members 27 and 28 were all set to 80 mm.

The test results are shown in Table 5. As a result, the construction time when the heat-resistant fiber support member 27 was stud-welded was only 10 minutes, and the construction time could be significantly shortened as compared with the case where the heat-resistant fiber support member 28 was manually welded.

Further, when the condition of the amorphous refractory material 19 was confirmed after operating the heating furnace at an operating temperature of 1300 ° C. for 6 months, both when the heat-resistant fiber support material 28 of FIG. 13 and the heat-resistant fiber support material 28 of FIG. 15 were used. , The peeling of the amorphous refractory 19 was not confirmed, and the sound condition was confirmed.

From the above results, it was confirmed that the application of the present invention can contribute to the improvement of the life of the amorphous refractory construction body.

Although the preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, the present invention is not limited to such examples. It is clear that a person having ordinary knowledge in the field of technology to which the present invention belongs can come up with various modifications or modifications within the scope of the technical idea described in the claims. , These are also naturally understood to belong to the technical scope of the present invention.

1 Heat-resistant fiber rope 2 Metal tube 3 Crimping part 4 Heat-resistant fiber support material 5 Metal wire 6 Heat-resistant fiber support material (internal metal wire)
8 Heat-resistant fiber support material during deflection 9 Acrylic container 10 Iron plate 11 Grooved steel 12 Beaker 13 Glycerin 14 Displacement meter 15 Slide gauge 16 Deflection amount [mm]
17 Amount of support for amorphous refractories [mm]
18 Unsupported amount of amorphous refractory [mm]
19 Amorphous refractory 20 Tensile tester 21 Water-cooled pipe 22 Support 23 Metal support 24 Beam part 25 Post part 26 Thin-walled part for stud welding 27 Heat-resistant fiber support material with thin-walled part for stud welding 28 Thin-walled part No heat-resistant fiber support material

Claims (16)

Amorphous refractory and
A support having a vertical wall surface and supporting the amorphous refractory constructed on the wall surface, and
A heat-resistant fiber support material embedded inside the amorphous refractory while being connected to the wall surface of the support.
With
The heat-resistant fiber support material has a heat-resistant fiber rope made of inorganic long fibers and has a heat-resistant fiber rope.
The heat-resistant fiber rope has an annular portion, and a metal wire is embedded in the core of the heat-resistant fiber rope.
The annular portion is embedded in the amorphous refractory in a state of being self-supporting with respect to the wall surface of the support due to the elasticity of the metal wire.
The self-supporting state is a state in which the annular portion is not bent or has little deflection in the state where the amorphous refractory is constructed, and the state in which the annular portion is not bent or has little bending is the state in which the annular portion is not bent or has little bending. An amorphous refractory structure characterized in that it is in a state obtained by using the heat-resistant fiber support material in which the amount of deflection when a load of 2N is applied to the tip of the portion is 6.04 mm or less. The amorphous refractory structure according to claim 1, wherein the metal wire is made of any one of a hard steel wire, a piano wire, and a stainless steel wire. Said inorganic lengthy fibers are composed of one or more of the material of the _Al 2 _{O 3} quality, SiO _{2 quality,} Al ₂ O 3 -SiO _{2 quality, Al 2 O 3 -SiO 2 -B} 2 O 3 Quality The amorphous refractory structure according to claim 1 or 2, characterized in that. The amorphous refractory structure according to any one of claims 1 to 3, wherein the heat-resistant fiber rope is cured with a curing agent. The heat-resistant fiber support material is
With the heat-resistant fiber rope
A connecting member that connects the heat-resistant fiber rope and the support,
The amorphous refractory structure according to any one of claims 1 to 4, wherein the structure is characterized by having. The connecting member comprises a metal tube fixed to the support.
The amorphous refractory structure according to claim 5, wherein the end portion of the heat-resistant fiber rope is in close contact with the inside of the metal pipe. The amorphous shape according to claim 6, wherein the direction in which the load of the irregular refractory material acts on the heat-resistant fiber rope is different from the direction in which the end portion of the heat-resistant fiber rope is pulled out from the metal pipe. Refractory structure. The amorphous refractory structure according to claim 6 or 7, wherein the metal pipe is fixed to the support by stud welding. In a method for manufacturing an amorphous refractory structure including an amorphous refractory and a support for supporting the amorphous refractory.
A heat-resistant fiber support material having a heat-resistant fiber rope made of inorganic long fibers and a metal wire internal to the core of the heat-resistant fiber rope and having an annular portion of the heat-resistant fiber rope is provided with a vertical support material. A step of fixing the annular portion substantially perpendicular to the wall surface and in a state where the annular portion is self-supporting with respect to the wall surface of the support by the elasticity of the metal wire.
A step of pouring the amorphous refractory around the wall surface of the support to which the heat-resistant fiber support material is fixed, and
Including
The self-supporting state is a state in which the annular portion is not bent or has little deflection in a state where the amorphous refractory is constructed, and the state in which the annular portion is not bent or has little bending is the state in which the annular portion is not bent or has little bending. A method for manufacturing an amorphous refractory structure, which is in a state obtained by using the heat-resistant fiber support material in which the amount of deflection when a load of 2N is applied to the tip of the portion is 6.04 mm or less. .. The deficiency according to claim 9, wherein in the step of fixing the heat-resistant fiber support material to the wall surface of the support, the heat-resistant fiber support material is fixed to the wall surface of the support by stud welding. A method for manufacturing a standard refractory structure. The heat-resistant fiber support material further has a metal tube fixed to the support, and is in close contact with the heat-resistant fiber rope with the end portion inserted inside the metal tube.
10. The step of fixing the heat-resistant fiber support material to the wall surface of the support is characterized in that the metal pipe of the heat-resistant fiber support material is fixed to the wall surface of the support by stud welding. A method for manufacturing an amorphous refractory structure according to. The metal tube has a thin-walled portion formed at the tip on the side fixed to the support.
The method for manufacturing an amorphous refractory structure according to claim 11, wherein the thin portion of the metal pipe is fixed to the wall surface of the support by stud welding. A heat-resistant fiber support material that is connected to the vertical wall surface of a support that supports an amorphous refractory and is embedded inside the amorphous refractory that is installed on the vertical wall surface of the support.
Heat-resistant fiber rope made of inorganic long fibers and
A connecting member that connects the heat-resistant fiber rope and the wall surface of the support,
With
The heat-resistant fiber rope has an annular portion, and a metal wire is embedded in the core of the heat-resistant fiber rope.
The annular portion is self-supporting with respect to the wall surface of the support due to the elasticity of the metal wire.
The self-supporting means that the annular portion is not bent or has little bending in a state where the heat-resistant fiber support material is fixed to the wall surface and the amorphous refractory is applied. The state of non-deflection or less deflection means that the amount of deflection when a load of 2N is applied to the tip of the annular portion while the heat-resistant fiber support material is fixed to the wall surface is 6.04 mm or less. A heat-resistant fiber support material, which is in a state obtained by using the heat-resistant fiber support material. The heat-resistant fiber support material according to claim 13, wherein the metal wire is made of any one of a hard steel wire, a piano wire, and a stainless steel wire. The connecting member comprises a metal tube fixed to the support.
The heat-resistant fiber support material according to claim 13 or 14, wherein the end portion of the heat-resistant fiber rope is in close contact with the inside of the metal tube in a state of being inserted. The heat-resistant fiber support material according to claim 15, wherein the metal tube has a thin-walled portion formed at the tip on the side fixed to the support.