JPH05306161A - Non-fired refractory heat insulating furnace material and its production - Google Patents

Abstract

PURPOSE:To obtain the rigid furnace material which can be simply and easily produced, can shorten working time and can improve a working environment by integrally forming a refractory layer or plural heat insulating layers. CONSTITUTION:This furnace material 10, which is the non-fired refractory heat insulating-furnace material, is constituted by integrally forming the refractory layer 20 and/or the plural heat insulating layers 30. The furnace material 10 can be produced by respectively compression molding the refractory layer 20 and/or the plural heat insulating layers 30 and integrally laminating the respective layers via joining materials 40 (41, 42). The furnace material 10 can be obtd. by another process of compression molding either one layer of the refractory layer 20 and/or the plural heat insulating layers 30, then successively compression molding the other layers atop the above-mentioned layer, thereby integrally laminating and forming the furnace material.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an unfired fireproof heat insulating furnace material and a method for producing the same.

[0002]

2. Description of the Related Art In constructing a so-called reverberatory furnace such as a metal melting furnace for aluminum or the like, a glass melting furnace or a heat treatment furnace, generally, a refractory material and a heat insulating material are separately attached from the inside of the furnace. is doing. Insulation is often formed by multiple layers that optionally include a refractory insulation that is highly refractory.

However, in the conventional furnace construction work, since each furnace material is usually put up in two or three layers, it is troublesome and time-consuming. In particular, the shortage of skilled persons who perform this kind of work and the difficulty of training are becoming more and more serious in combination with a severe working environment.

[0004]

In view of such a situation, the present invention has greatly improved the complexity of this type of furnace construction work and can be performed easily and easily, thus shortening the work time. At the same time, we are going to propose a new and robust furnace material that can greatly improve the working environment.

[0005]

In order to achieve the above object, the non-fired refractory insulation material of the present invention comprises a refractory layer and one or more insulation layers integrally formed.

Further, as a method for producing the non-fired refractory heat insulating furnace material, it is proposed that the fire resistant layer and one or a plurality of heat insulating layers are respectively compression-molded and the layers are integrally laminated and polymerized via a bonding material.

Further, as another manufacturing method, when obtaining a refractory heat insulating furnace material in which a fire resistant layer and one or more heat insulating layers are integrally formed, one of the fire resistant material layer and one or more heat insulating layers is formed. It is proposed to compression mold and then sequentially compression mold other layers onto the top surface of the layer to form an integral laminate.

Further, as another manufacturing method, when obtaining a refractory heat insulating furnace material in which a fire resistant layer and one or a plurality of heat insulating layers are integrally formed, the materials forming the respective layers are sequentially laminated, and the entire material is formed. It is proposed to perform compression molding to integrally form a laminate.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to the drawings, FIG. 1 is a perspective view of an unfired fireproof heat insulating furnace material showing an embodiment of the present invention, and FIG.
Is a perspective view showing another example, FIG. 3 is a cross-sectional view showing a compression molding step as an example of the manufacturing method of the present invention, FIG. 4 is a cross-sectional view showing the joining step, and FIG. 5 is a cross-sectional view showing another example. 6 is a sectional view of a forming die showing another example of the manufacturing method of the present invention, FIG. 7 is a sectional view of a forming die showing the other example, and FIG. 8 is a sectional view of a forming die showing still another example.

Further, FIG. 9 and subsequent figures show another example of the present invention and the manufacturing method, and FIG. 9 is a partially cutaway perspective view showing another example of the non-fired fireproof heat insulating furnace material of the present invention. FIG. 10 is a partially cutaway perspective view showing another example, FIG. 11 is a perspective view showing another example of the uneven portion, and FIG. 12 is a cross section of a molding die showing another example of the manufacturing method of the present invention. FIG. 13, FIG. 13 is a sectional view of a forming die showing another example, FIG. 14 is a sectional view of a forming die showing still another example, and FIG. 15 is an example in which the unfired refractory heat insulating furnace material of the present invention is constructed in a furnace body FIG. 16 is a cross-sectional view of the furnace, and FIG. 16 is a perspective view showing a connected state of the furnace materials.

As shown in FIG. 1, in the non-fired refractory heat insulating furnace material 10 of the present invention, a heat insulating layer 30 is integrally formed with a fire resistant layer 20.

The refractory layer 20 is made of a known refractory material containing a compound of Al ₂ O ₃ and SiO ₂ or a compound of ZrO ₂ and SiO ₂ as a main component. The refractory material 10 is disposed inside the furnace at 1500 ° C. Withstands high temperatures of up to 2000 ° C.

The heat insulating layer 30 has one or a plurality of layers integrally formed with the refractory layer 20. In this embodiment, the heat insulating layer 30 comprises two layers, a fire resistant heat insulating layer 31 and a heat insulating layer 32.

The refractory heat insulating layer 31 is made of a compound of Al ₂ O ₃ and SiO ₂ and has a fire resistance of 600 ° C. to 1200 ° C.

The heat insulating layer 32 is made of calcium silicate or the like and is disposed outside the furnace material 10 and is 600 ° C. to 1000 ° C.
It has a fire resistance of.

FIG. 2 shows another example of the non-fired fireproof heat insulating furnace material of the present invention. In the furnace material 11 shown here, the heat insulating layer is formed by a single layer 33. Reference numeral 21
Is a refractory layer.

FIG. 3 shows an example of the method for manufacturing the furnace material of the present invention. A refractory material 20A (21A) forming the refractory layer 20 (21) is put into the molding die 50. Then, the refractory material 20A is compression-molded by the press die 60 to obtain the refractory layer 20 (21). Similarly, the heat insulating material 30A (31A, 32A, 33A) forming the heat insulating layer 30 is put into the molding die 50, and compression molding is performed on each of the heat insulating materials 31A, 31A, 32A, 33A.
Get (32,33).

The fireproof layer 20, the fireproof heat insulating layer 31, and the heat insulating layer 32 thus obtained are integrally laminated and polymerized through the bonding materials 40 and 41 between the layers as shown in FIG. It is formed on the firing refractory heat insulating furnace material 12.

The bonding material 40 (41, 4) used here
As 2), known binder materials such as an aqueous solution of a mixture of Al ₂ O ₃ and SiO ₂ or an aqueous solution of a mixture of ZrO ₂ and SiO ₂ are preferable.

Further, the heat insulating layer 33 is formed by one layer, and is integrally laminated and polymerized with the fire resistant layer 21 through the bonding material 43, so that the non-fired fire resistant heat insulating furnace material as shown in FIG. 13 is obtained.

6 to 8 show another example of the manufacturing method of the present invention. First, as shown in FIG. 6A, the refractory material 20A is placed in the molding die 51, and as shown in FIG. 6B, the refractory material 20A is compression-molded by the press die 61 to form the refractory layer 20. It is formed. And press die 61
The refractory material 20A is compression molded to obtain the refractory layer 20. Next, as shown in (c) and (d) of the figure, the refractory heat insulating material 31A is put on the upper surface of the refractory layer 20 formed in the molding die 51, and compressed by the press die 61 so that the fire refractory insulation is obtained. The layer 31 is integrally formed on the upper side of the refractory layer 20. Similarly, as shown in (e) and (f), the heat insulating material 32A that forms the heat insulating layer 32 is arranged on the upper surface of the fire resistant heat insulating layer 31 of the molding die 51, and compression molding is sequentially performed as described above to perform heat insulation. The layer 32 is integrally formed. The molding order of each layer may be reversed from the above example.

FIG. 7 shows an example in which the heat insulating layer is formed of one layer. In the figure, 21A is a refractory material, 33A is a heat insulating material, 52 is a molding die, and 62 is a press die.

FIG. 8 shows another example of the manufacturing method of the present invention. The refractory material 20A forming the refractory layer 20 in the molding die 53, the refractory heat insulating material 31A forming the fire resistant heat insulating layer 31, and the heat insulating layer 32. 32A of heat insulating materials that form
The whole of the heat insulating material 32A is integrally compression-molded by the press die 63 from the upper side.

FIG. 9 shows another example of the furnace material of the present invention, which is an unfired fireproof heat insulating furnace material in which a heat insulating layer 36 composed of a fire resistant heat insulating layer 34 and a heat insulating layer 35 is integrally formed on the fire resistant layer 22. 1
4, the uneven portions D are formed on the boundary portions a and b of the respective layers. In this embodiment, the uneven portion D is composed of a plurality of ridges D1. It is possible to further strengthen the joint between the uneven portion D and the layer material arranged on the upper side, and to provide a robust furnace material.

FIG. 10 shows another example of the non-fired refractory heat insulating furnace material of the present invention. In the furnace material 15 shown here, the heat insulating layer is formed by a single layer 37, and the refractory layer 23
The boundary portion c has a concave-convex portion D.

FIG. 11 shows another example of the uneven portion. In this example, the boundary portion of the layer S is formed with a concave-convex portion D2 including a plurality of semicircular convex portions D3.

12 to 14 show another example of the manufacturing method of the present invention, in which the above-mentioned furnace materials 14 and 15 can be obtained. First, as shown in FIG. 12A, the refractory material 22A is placed in the molding die 54, and as shown in FIG. 12B, the refractory material 22A is compression-molded by the press die 64 to form the refractory layer 22. can get. The die surface of the press die 64 is formed in an uneven shape, and when the refractory layer 22A is compression-molded, an uneven portion D is formed on the compression surface. next,
As shown in (c) and (d) of the figure, the mold 5
On the upper surface of the refractory layer 22 formed in
4A is charged and compressed by the press die 64. Then, the refractory heat insulating layer 34 is integrally formed on the upper side of the refractory layer 22 via the uneven portion D formed on the compression surface thereof.
Finally, as shown in (e) and (f), the heat insulating layer 35
The heat insulating material 35A that forms the
The heat insulating layer 35 is disposed on the upper surface and is sequentially compression-molded by the press die 60 having a flat compression surface as described above to integrally form the heat insulating layer 35. In the obtained block-shaped furnace material, the boundary portions d and e of the respective layers are formed in an uneven shape, and the respective layers are firmly joined. The molding order of each layer may be reversed from the above example.

FIG. 13 shows an example in which the heat insulating layer is formed of one layer. In the figure, 23A is a refractory material, 36A is a heat insulating material, and 55 is a mold. As described above, the refractory material 23A is compressed by the press die 65 having the uneven shape, and the uneven portion D is formed at the boundary portion f with the heat insulating material 36A to be arranged next.

FIG. 14 shows another example of the manufacturing method of the present invention. A refractory material 24A for forming the refractory layer 24 and a refractory insulation material 38A for forming the refractory heat insulating layer 38 in the molding die 56.
And the heat insulating material 39A which forms the heat insulating layer 39 is sequentially laminated. At that time, as shown by the chain line in the drawing, by arranging each layer in the molding die 56 via a jig having a mesh of an appropriate size, for example, a jig g, the boundary portion g of each layer, The uneven portion D is formed in h. And press die 6
By 0, the entire heat insulating material 39A is integrally compression-molded from the upper side to obtain a block-shaped furnace material.

FIG. 15 shows an example in which the unfired refractory heat insulating furnace material of the present invention is formed in a furnace shape. Reference numeral 70 is a block-shaped furnace material, which is integrally formed by disposing a refractory layer 71 inside the furnace and a heat insulating layer 72 outside the furnace. Further, an uneven portion D is formed at the boundary between the refractory layer 71 and the heat insulating layer 72. The furnace material 70 is formed into a predetermined furnace body shape by connecting side surfaces 73, 73, and upper and lower surface sides (not shown) connected to each other through a bonding material made of a known refractory material. There is. Reference numeral 77 is an outer shell material such as a metal plate that covers the outside of the furnace body.

This furnace material 70 has a recessed portion 75 on the side surface 73 of the furnace material 70, as will be better understood from FIG.
Is provided. This concave portion 75 is a refractory material 80 described later.
Adjacent to the block furnace material 70a
Of the refractory material 8 into the void 76 formed by the concave portion 75a of
0 is filled.

When the refractory material 80 has an irregular shape such as powder or paste, the refractory material 80 is connected to the concave portions 75, 75 of the block furnace materials 70, 70a.
The voids 76 formed by a are filled. When the refractory material 80 is a standard product, as shown in FIG. 16, the refractory material 80 is molded into the size of the void 76 and filled in the void 76 via a bonding material.

[0033]

As shown and described above, according to the non-fired refractory heat insulating furnace material and the manufacturing method thereof of the present invention, it is not necessary to separately bond the fire resistant material and the heat insulating material, so that the furnace construction work is extremely simple. Moreover, the work environment can be shortened and the working environment can be greatly improved. In addition, the obtained furnace material is robust and does not cause peeling of each layer or leakage of molten metal from the furnace, and thus a safe furnace can be provided.

[Brief description of drawings]

FIG. 1 is a perspective view of an unfired fireproof heat insulating furnace material showing an embodiment of the present invention.

FIG. 2 is a perspective view showing another example.

FIG. 3 is a cross-sectional view showing a compression molding process which is an example of the manufacturing method of the present invention.

FIG. 4 is a cross-sectional view showing the joining step.

FIG. 5 is a cross-sectional view showing another example.

FIG. 6 is a cross-sectional view showing another example of the manufacturing method of the present invention.

FIG. 7 is a cross-sectional view showing another example of the same.

FIG. 8 is a cross-sectional view showing still another example.

FIG. 9 is a partially cutaway perspective view showing another example of the non-fired fireproof heat insulating furnace material of the present invention.

FIG. 10 is a partially cutaway perspective view showing another example of the same.

FIG. 11 is a perspective view showing another example of the uneven portion.

FIG. 12 is a sectional view of a molding die showing another example of the production method of the present invention.

FIG. 13 is a cross-sectional view of a molding die showing another example.

FIG. 14 is a sectional view of a molding die showing still another example.

FIG. 15 is a sectional view of a furnace showing an example in which the unfired fireproof heat insulating furnace material of the present invention is configured in a furnace body.

FIG. 16 is a perspective view showing a connected state of furnace materials.

[Explanation of symbols]

 10 furnace material 20 fireproof layer 21 fireproof layer 30 heat insulating layer 31 fireproof heat insulating layer 32 heat insulating layer D irregularities

Claims (8)

[Claims] 1. A non-fired fireproof heat insulating furnace material comprising a fireproof layer and one or more heat insulating layers integrally formed. 2. The non-fired refractory heat insulating furnace material according to claim 1, wherein the boundary portion of each layer is uneven. 3. A method for producing a non-fired refractory heat insulating furnace material, characterized in that a fire resistant layer and one or a plurality of heat insulating layers are respectively compression-molded and the layers are integrally laminated and polymerized via a bonding material. 4. The method for producing a non-fired refractory heat insulating furnace material according to claim 3, wherein the boundary portion of each layer is formed in an uneven shape. 5. When obtaining a refractory heat insulation furnace material in which a refractory layer and one or more heat insulation layers are integrally formed, one of the refractory material layer and one or more heat insulation layers is compression molded, and then, A method for producing a non-fired refractory adiabatic furnace material, characterized in that another layer is sequentially compression-molded on the upper surface of the layer to be integrally laminated. 6. The method for producing a non-fired refractory heat insulating furnace material according to claim 5, wherein the boundary portion of each layer is compression molded into an uneven shape. 7. When obtaining a refractory insulation furnace material in which a refractory layer and one or a plurality of heat insulation layers are integrally formed, the materials forming the respective layers are sequentially laminated, and the whole material is compression molded to be integrally formed. A method for producing a non-fired refractory heat insulating furnace material, which is characterized by forming layers. 8. The method for manufacturing an unfired refractory heat insulating furnace material according to claim 7, wherein the boundary portions of the respective layers are laminated in an uneven shape.