JPH0718651B2 - Heat resistant block - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention is used to form a furnace wall or the like using an inorganic fibrous molding (inorganic fibrous blanket) such as alumina fiber and ceramic fiber. Regarding heat resistant blocks.

[Prior art]

Generally, in various types of industrial furnaces, the temperature inside the furnace becomes as high as several thousand and several hundred degrees, so in consideration of high temperature resistance, the furnace wall inside the furnace formed with iron plates etc. is lined with refractory bricks or other refractory materials. And had been given sufficient fire resistance.

At this time, the method of lining the furnace wall with refractory bricks,
The construction period is long, material and equipment costs are high, and heat resistance is poor. Moreover, since it has a structure in which refractory bricks are stacked to form a furnace wall, it is structurally fragile and not suitable for forming a large furnace or a blast furnace.

In addition, as an example of the prior art belonging to the latter, for example, Japanese Patent Publication Sho
There is an invention described in Japanese Patent No. 53-114085.

According to the present invention, as shown in FIG. 5, a large number of plate-shaped ceramic fiber blankets b are compressed and laminated along a furnace casing a formed of an iron plate or the like, and the ceramic fiber blankets b are supported in the laminating direction. A part of the support body d, into which the rod c is inserted and which is integrally arranged on one side of the side surface of the ceramic fiber blanket b in the stacking direction, is projected between the ceramic fiber blankets b so as not to project to the other side. The support bar c
Is a fireproof heat insulating structure in which a ceramic fiber blanket b is fixed and a furnace wall e is formed.

However, in the refractory heat insulating structure having the above-described structure, the support body d thermally expands particularly in the opposite direction to the furnace casing a during the operation of the furnace, so that the support rod c inserted in the ceramic fiber blanket b is accompanied by this. It moves in the direction opposite to the furnace casing a. Therefore, the ceramic fiber blanket b may be broken or deformed due to the influence of high heat when the fibers are broken. Therefore, another stacked ceramic fiber blanket b is broken on the insertion surface of the supporting rod c on the side opposite to the furnace casing a with respect to the supporting rod c, and the life of the furnace casing a becomes short. At this time, in order to partially replace and supplement the ceramic fiber blanket b, it is necessary to remove the support rod c from the support body d, so that it is not easy to partially replace the ceramic fiber blanket b.

[Object of the Invention]

The present invention has been made in view of the above points,
The purpose is to manufacture the block as a single unit at the factory to reduce the equipment cost and material cost, the construction period is short on site, and the construction cost is low. Even if it is thermally expanded in the direction, the inorganic fibrous molded body does not crack or deform, forms a heat resistant furnace wall inside the furnace casing, and replaces the inorganic fibrous molded body with respect to the mounting substrate. The purpose is to provide a heat-resistant block that can be easily manufactured.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. In each figure, the same parts are designated by the same reference numerals. Reference numeral 1 is a furnace casing formed of an iron plate or the like, 2 is a mounting board as a core material having a large number of filling voids 2a such as a metal lath, and this mounting board 2 exhibits sufficient strength and heat resistance after mounting. It is advantageous for assembly and processing that it exhibits some flexibility during assembly and processing. For example, JIS lath, flat lath No. 3-4 metal lath is suitable, but punch metal (not shown) is used instead of metal lath. A perforated iron plate) may be used.

Further, the size of the mounting substrate 2 is set so that the adjacent block units A are closely connected to each other so that the joint is not opened.
Use a block that is about 10 mm smaller in length and width than the size of the block to be formed. 3 is a furnace casing 1 when assembled
A step as one connecting means projecting from one end (front end) of the mounting substrate 2 so as to be connected to the rear lower surface of the preceding block unit A continuously arranged along the inner surface of the It is a plug-in piece. A plurality of, for example, two support members 4 are provided at the other end (rear end) of the mounting substrate 2 in the thickness direction as the other connecting means. The supporting member 4 has a thickness of the mounting substrate 2 during assembly. It is fixed by welding or the like on the inside of the furnace casing 1 as a fixed member located in the direction.

Reference numeral 5 denotes a refractory mortar layer which is applied and solidified by using the mounting substrate 2 as a core material. The refractory mortar layer 5 may be ordinary refractory mortar, but is not re-softened when water in the furnace casing 1 is condensed, for example. A self-hardening water glass type or a gas-hardening colloidal silica type is preferable.

Reference numeral 6 is a block-shaped inorganic fiber molded body formed of high heat resistant inorganic fiber such as alumina fiber or ceramic fiber. This inorganic fiber molded body 6 is attached to the mounting substrate 2 via the refractory mortar layer 5. Bonded and retained. The inorganic fibrous molded body 6 is formed by an organic binder by a wet molding method, or a piece of a needling blanket is mechanically laminated and the small pieces are bonded by an organic binder. It is possible to suture with a thread.

7 is compressed to the mounting substrate 2 through the refractory mortar layer 5,
A support rod formed of heat-resistant steel for fixing the laminated inorganic fibrous molded bodies, and the support rods 7 are a plurality of, for example, two each on the left and right, so that a total of four support rods are provided so as to face each other in a plane. One end (lower end) is fixedly attached to the left and right end portions of the upper surface of the mounting board 2 and is mounted at an arbitrary angle, for example, an angle of 30 ° to 45 ° with respect to the mounting board 2. As shown in the drawing, it is preferable that the bent portion has a radius of 100 to 200 mm. 7a is a free end of the support rod 7.

Reference numeral 9 denotes a heat-resistant inorganic fiber body which is mounted in a compressed state between the furnace casing 1 and the mounting substrate 2 when the heat-resistant furnace wall 8 is formed on the inner surface of the furnace casing 1.
Uses rock wool or ceramic fiber and keeps the temperature of the mounting substrate 2 and the refractory mortar layer 5 above 100 ° C to prevent the corrosion of the mounting substrate 2 due to dew condensation and to re-soften the refractory mortar layer 5. It is for prevention.

One embodiment of the present invention is constructed as described above, and the heat resistant furnace wall 8 is formed by forming a succeeding book unit A between two supports 4 and 4 at the rear and lower parts of the preceding block unit A. The block piece A is sequentially connected to the inner surface of the furnace casing 1 by inserting the insertion piece 3 provided at one side end (front end) of the block so that the blocks are sufficiently close to each other so that no gap is generated between the blocks. .
Further, since the heat-resistant inorganic fiber body 9 is attached between the furnace casing 1 and the mounting substrate 2 in a compressed state, the block unit A can be attached to the furnace casing 1 without inclining it with respect to the uneven surface of the inner surface of the furnace casing 1. A stable heat-resistant furnace wall 8 can be formed that can be arranged along the wall and does not fall.

Next, the two support bodies 4 provided on the other end (rear part) of each block unit A are welded to the furnace casing 11 to fix each block unit A to the inner surface of the furnace casing 1. .
In this way, the inorganic fiber molded body 6 of each block unit A formed by the compressed and laminated alumina fibers or ceramic fibers is connected to the inner surface of the mounting substrate 2 of each block unit A.

By such a procedure, the inner surface of the furnace casing 1 is covered with the block unit A, and the heat-resistant furnace wall 8 is formed.

In addition, the inorganic fiber molded body 6 formed of alumina fiber or ceramic fiber material has supporting rods 7 and 7 facing each other at an arbitrary angle, preferably at a mounting angle of 30 to 45 ° so as to be staggered in a plane. Since 7,7 are fixed to the mounting substrate 2 by being inserted inside, when the temperature inside the furnace casing 1 becomes high and the supporting rods 7,7: 7,7 expand due to thermal expansion in the longitudinal direction. Moreover, since the free end 7a of the fiber enters the inorganic fiber molded body 6 in the laminated state, the fiber is not pulled and the fiber is not stressed. in this case,
Since the support bar 7 formed with a radius of curvature of 100 to 200 m as shown in the drawing has a curvature rather than the straight support bar, the support bar 7 is inserted into each laminated inorganic fiber molded body 6 at an average depth. It In addition, since the support rods 7, 7: 7, 7 are alternately opposed to each other and are inserted into the inorganic fiber molded body 6 by twos from the left and right sides, in addition to the adhesive force of the refractory mortar layer 5, the support substrate 7 is attached to the mounting substrate 2. It is firmly fixed.

Further, in the above embodiment, in order to fix the block to the furnace casing 1, the supports 4, 4 provided at the rear end of the mounting substrate 2 are fixed to the furnace casing 1 by welding or the like.
As shown in the drawing, the mounting substrate 2 may be fixed to the furnace casing 1 by means of screwing means such as a bolt 10 fixed to the mounting substrate 2 and a nut 11, or as shown in FIG. Even when the furnace casing 1 is not provided in some parts, the heat-resistant furnace wall 8 may be formed by supporting the hooks 12 fixed to the mounting substrate 2 by supporting rods 13 and suspending them. Incidentally, in the structure shown in FIG. 3, the block unit A can be partially replaced by removing the nut 11 from the bolt 10.

〔The invention's effect〕

As described above, the present invention has a structure in which a plurality of support rods are compressed and laminated in the width direction of the mounting substrate and inserted in the thickness direction at arbitrary angles so as to face each other in a plane staggered manner. Even if the supporting rod is thermally expanded in a particular direction due to high heat, the heat-resistant inorganic fibrous molded body is not cracked or deformed, and a furnace wall with high heat resistance can be formed. Protect from high temperatures.

In addition, since the block itself is manufactured in the factory instead of on-site construction, the facility cost and material cost are low, and the on-site assembly period is short, the construction cost is low, and the work can be performed easily.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view showing an embodiment of the present invention, FIG.
FIG. 4 is a sectional view of the same when assembled, FIG. 3 is a sectional view of a second embodiment showing other connecting means, FIG. 4 is a sectional view of the same third embodiment, and FIG. It is sectional drawing which showed an example of this kind of fireproof heat insulation structure. 1 ... Furnace casing, 2 ... Mounting board, 3 ... Insert,
4 ... Support, 5 ... Fireproof mortar layer, 6 ... Inorganic fibrous molding, 7 ... Support rod, 9 ... Heat-resistant inorganic fibrous body.

Claims (1)

[Claims] 1. A mounting substrate made of metal having a large number of filling voids, and a plurality of support rods having appropriate inclination angles and fixed at one end so as to face each other in a plane staggered manner on both side ends of the mounting substrate. Connecting means provided at both ends of the mounting substrate, a refractory mortar layer solidified with the mounting substrate as a core material, and a compression, laminated, high heat resistant inorganic fiber material supported on the mounting substrate by the supporting rods. A heat resistant block consisting of a molded body.