JPH0760066B2 - Method for constructing furnace wall by ceramic fiber block and furnace wall structure - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a furnace wall construction method and a furnace wall structure such as a heating furnace and a heat treatment furnace in the metal industry, a firing furnace in the ceramic industry, and more particularly, to a furnace wall formed of a ceramic fiber block. The present invention relates to a construction method and a fireproof block.

2. Description of the Related Art In recent years, ceramic fibers are often lined on the furnace wall in heating furnaces and heat treatment furnaces in the metal industry, firing furnaces in the ceramic industry, and the like.

The block method is used as one of the methods for constructing the furnace wall with ceramic fibers. The block method is a method of cutting a ceramic fiber blanket into strips and stacking them in multiple blocks to form a block, or folding the blanket into blocks to create a refractory block, which is then attached to the furnace by various attachment means. This is a method of fixing to the wall casing.

In this block method, since the original plane of the ceramic fiber blanket is arranged in the thickness direction of the block body, that is, perpendicular to the furnace wall surface, many of the ceramic fiber fibers are arranged in the same direction. In addition, even if the fiber on the inner surface of the furnace deteriorates to some extent due to heating of the furnace, it has the advantages that it does not easily peel off or fall off, and that the fibers of the ceramic fiber do not easily scatter due to the speed of hot air in the furnace. It is used.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, the defect of the furnace wall due to the block construction method starts when a joint gap is generated between the refractory block bodies due to the contraction of the inner surface side of the refractory block body, and the furnace is cut from this joint gap gap. The high heat inside may gradually be transmitted to the attachment portion of the refractory block body on the back surface of the furnace wall, resulting in overall damage.

In order to prevent this, if the refractory block is mounted in a compressed state, even if a slight joint breakage occurs due to shrinkage on the heating surface inside the furnace, the restoring force of the refractory block will act on the casing side behind it. It is possible to suppress the generation of gaps and maintain the integrity of the furnace.

However, it is not easy to mount the refractory block in a compressed state, and it is also not easy to compress many refractory blocks uniformly and mount them at predetermined positions.

In addition, when attaching the fireproof block body to the casing, when attaching the fireproof block body, weld the anchor bolts or other mounting brackets one by one, or attach the anchor bolts and other mounting brackets to the casing beforehand. A fireproof block is installed in advance. In the former case, since the anchor bolts and the like are welded while applying a compressive force to the refractory block, it is easy for the position to shift, and if the position shifts, the amount of compression becomes uneven. Also, in the latter case, the positioning of the refractory block is accurate, but since the anchor bolts are welded to the casing surface in advance, this interferes with the sliding of the refractory block on the casing surface, and compression or compression. However, there is a drawback that it is difficult to attach the refractory block body.

Means for Solving the Problems The present invention has been made in view of the above points, and in a furnace wall construction method using a ceramic fiber block in which a refractory block body of ceramic fibers is stacked and constructed on a furnace wall for high temperature heating, Mounting bolts on the casing of the furnace wall with mounting holes at regular intervals narrower than the vertical dimension of the refractory block by 5 to 25 mm and narrower than the lateral dimension of the refractory block by 5 to 25 mm. Facing the fireproof block body protruding to the back side, and making the tip of the bar-shaped compression stacking jig thin, and from the tip to a position half the width of the fireproof block body in the direction perpendicular to it. A refractory block body formed by projecting a stamp-shaped pad to a predetermined length, inserting the tip of the compression stacking jig into the mounting hole of the casing, and attaching it with the stamp-shaped pad. Push the side surface or upper surface to compress it, insert the mounting bolt of the fireproof block into the specified mounting hole of the casing, insert it, and fix the mounting bolt to the mounting hole with a nut etc. Mounted in a horizontal direction and mounted on a fireproof block body that is mounted horizontally and a sheet-like spacer of a ceramic fiber blanket, and the next fireproof block body is placed on this spacer. The present invention provides a method of constructing a furnace wall using a ceramic fiber block, a furnace wall structure and a fireproof block, which are sequentially mounted on a casing and stacked.

When a furnace wall such as a heating furnace for high-temperature heating is constructed by the method of forming a furnace wall of the present invention, the length is 5 to 25 mm from the vertical and horizontal dimensions of the refractory block body.
Face the ceramic fiber refractory block body to the casing of the furnace wall where the mounting holes were opened at a narrow constant interval,
The side surface or upper surface of the refractory block body can be pressed and compressed with a stacking jig for compression with the tip inserted into the mounting hole of the casing that secures the refractory block body. Move the refractory block attached to the upper part through the spacer to be mounted on the upper surface in a sliding manner, and use the jig for compression stacking as described above to attach the refractory block to the attachment hole opened in the casing of the furnace wall. It can be sequentially aligned and stacked.

Further, according to the present invention, the furnace wall structure can be constructed as described above, and a furnace wall structure obtained by uniformly compressing and stacking refractory block bodies having sufficient restoring force without a gap is obtained. . The refractory blocks can be neatly arranged side by side through the spacers, and the refractory blocks in a uniform compressed state can be piled up to suppress the occurrence of gaps between the refractory blocks and maintain the integrity of the furnace. .

Example Hereinafter, description will be given based on an example of the present invention.

FIG. 1 and the following are examples of the present invention. As shown in FIG. 1, a furnace wall structure (1) such as a heating furnace comprises a steel wall casing (2) which is a furnace wall, and a ceramic fiber blanket (3) laminated to a fireproof block body (4). It is piled up and formed so as to cover the inside of the furnace. As shown in the figure, mounting holes (5) for inserting bolts are opened at regular intervals in the casing (2) so that the refractory block body (4) can be fixed at a predetermined position. This mounting hole (5)
Is narrower than the size of the refractory block (4) to be attached by about 10 to 25 mm in the laminating direction X of the ceramic fiber blanket (3), and the thickness of the spacer (6) described later in the vertical direction Y thereof. 5 more than the total length
It is made narrower by about 15 mm so that the refractory block (4) can be sufficiently compressed for assembly.

The refractory block (4) is made of a ceramic fiber blanket (3) of a predetermined size as shown in FIGS.
A heat-resistant steel of stainless steel or a supporting rod (7) of sufficient rigidity made of ceramics is inserted into the plate at regular intervals to integrally form a laminate. Then, as shown in the figure, a support bar holding member (8) of a flat V-shaped heat-resistant steel plate is provided at the center of the support bar (7) inserted and fixed at the above-mentioned intervals at the center of the fireproof block (4). A fixed amount of interior is installed to hold it firmly, and a mounting bolt (9) is fixed to the central portion of this support rod holding member (8) and a predetermined amount is projected to the side surface of the fireproof block (4) as shown in FIG. It is inserted into the mounting hole (5) of the casing (2) so that it can be fixed.

The spacers (6) are inserted between Y-directions of the refractory block bodies (4) piled up as shown in FIG. 1 so that the refractory block bodies (4) can be uniformly compressed and aligned, and the mounting holes (5) can be easily attached. 10-25 mm
It is made of a blanket of ceramic fibers of a certain thickness.

Then, the refractory block body (4) is attached to the casing (2).
In order to attach it to the compression stacking jig (10), the thin tip of the rod-shaped compression stacking jig (10) as shown in FIG. 1 is inserted into the mounting hole (5).
A stamp-like pad (11) is provided so as to project from the tip of the to approximately half the thickness of the refractory block (4), and the pad (11) is used to project the fire-resistant block (4). ) Is pressed and compressed, and the mounting bolts (9) of the fireproof block body (4) are inserted so as to face the mounting holes (5), so that the fireproof block body (4) can be easily stacked on the casing (2). It is designed so that it can be built up.

Construction example Regarding the side wall of the billet heating furnace, the refractory block (4)
300 x 300 by layering with a kao wool 1500 ace (brand name) ceramic fiber blanket (3)
The block size is × 250mm and the bulk density is 0.192g / cc. The spacer (6) is the same material and the bulk density is 0.16g.
It was constructed as g / cc. The pitch of the mounting holes (5) of the casing (2) was set to 300 mm and 280 mm in the X and Y directions, respectively.

Then, when attaching the fireproof block body (4) to the casing (2), as shown in FIG.
By using a rod-shaped compression stacking jig (10) whose tip is inserted into the mounting hole (5) of Fig. 5, the compression stacking jig (10) is moved in the left-right direction or the vertical direction as shown in the figure, and The stamp-like pad (11) attached to the tip is pressed against the upper surface or side surface of the fireproof block body (4) to move the fireproof block body (4) while contacting the spacer (6),
When the protruding mounting bolt (9) is located on the fireproof block body (4) in the mounting hole (5) of the casing (2), the mounting bolt (9) is inserted, and the nut (12) is used to insert the fireproof block body (4). Was fastened and fixed to the casing (2).

In this way, the refractory block body (4) is compressed so that there is no gap between the blocks, and the blocks are sequentially stacked and constructed.

As a result of this construction, the bulk density of the fireproof block after construction is 0.21.
It can be compressed to 3 g / cc and can be compressed sufficiently, and when a large number of workers were required in the past, a small number of people such as 1 or 2 can easily and efficiently make the refractory block uniform. The fireproof wall could be firmly formed by compressing it to the construction.

In particular, in the embodiment, since the rigid support rods are inserted in the refractory block body at regular intervals and symmetrically, the refractory block body can be uniformly compressed and the shape can be prevented from collapsing, which is preferable. It is a thing. If necessary, the number of support rods may be increased and arranged in an axially symmetrical manner.

Although the side wall of the heating furnace has been described above, the ceiling wall can be similarly constructed.

Note that, in the embodiment, the projecting mounting bolts are inserted and fixed to the fireproof block body in the mounting holes of the casing, but other engaging and fixing means can be substituted based on the spirit of the present invention. .

EFFECTS OF THE INVENTION As described above, in the present invention, if the tip of the compression stacking jig is inserted into the mounting hole, the compression stacking jig can be used as a lever, and the stamp pad can be used for fireproofing. The side and top surfaces of the block can be easily pressed and compressed vertically and horizontally.The mounting bolts of the compressed refractory block can easily be inserted into the mounting holes opened in the casing of the furnace wall to efficiently insert them in sequence. The furnace wall structure can be constructed by stacking.

Then, the furnace wall of the furnace wall structure can be configured with no gap in the refractory block body in a uniform compressed state, and even if a slight joint breakage occurs due to contraction on the heating surface inside the furnace, the refractory block body on the rear casing side By the action of the restoring force, the generation of the gap can be suppressed, the integrity of the furnace wall structure inside the furnace can be maintained, and the furnace life can be extended.

In addition, the refractory block attached to the upper part is slidably moved through the spacer mounted on the upper surface of the refractory block horizontally arranged in the furnace wall casing, and the compression stacking jig is used as described above. Since the refractory block bodies can be sequentially aligned and stacked in the mounting holes opened in the casing of the furnace wall, the furnace wall structure can be efficiently constructed and the refractory block bodies can be neatly arranged side by side. By stacking the refractory blocks in a uniform compressed state, it is possible to suppress the generation of gaps between the refractory blocks of the furnace wall structure and maintain the integrity of the furnace wall structure inside the furnace. .

[Brief description of drawings]

FIG. 1 is a perspective sectional view in which a part of an embodiment of the present invention is omitted,
FIG. 2 is a side sectional view of the refractory block body of the above, FIG. 3 is a sectional view taken along the line AA of the same above, and FIG. 4 is a perspective view of the same. 1 ... Furnace wall structure, 2 ... Casing, 3 ... Ceramic fiber blanket, 4 ... Fireproof block, 5
...... Mounting hole, 9 ...... Mounting bolt, 10 ...... Compression stacking jig, 12 ...... Nut.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Izumi Oishi, 1 Kawasaki-cho, Chiba-shi, Chiba Prefecture, Chiba Works, Ltd. (72) Inventor Ikuji Horiuchi 3-2 Honohara, Toyokawa City, Aichi Prefecture Isolite Industry Co., Ltd. (56) References )

Claims (2)

[Claims] 1. A method of constructing a furnace wall using ceramic fiber blocks, in which a ceramic fiber refractory block body is stacked on a furnace wall for high temperature heating, and the furnace wall construction method is narrower than the longitudinal dimension of the refractory block body by about 5 to 25 mm. , The fireproof block body with the mounting bolts protruding toward the rear side is opposed to the casing of the furnace wall where the mounting holes are opened at a fixed interval of 5 to 25 mm in the lateral direction, which is narrower than the lateral dimension of the fireproof block body, and the rod-shaped compression is applied. The stacking jig is formed by making the tip end into a thin shape and projecting a stamp-like pad in a predetermined length from the tip end at a position half the thickness of the refractory block body at a right angle. Insert the tip of the compression stacking jig into the mounting hole of the casing, press the side surface or the top surface of the fire-resistant block body to be mounted with a stamp-like pad, and compress the fire-resistant block body. Align the mounting bolts with the specified mounting holes in the casing, insert the mounting bolts into the mounting holes with nuts, and mount the fireproof block horizontally, then install the fireproof block horizontally. Mount a sheet-shaped spacer of a ceramic fiber blanket on top, place the next refractory block on this spacer, and attach the refractory block to the casing one after another in the same manner as above A method for constructing a furnace wall by a characteristic ceramic fiber block. 2. A furnace wall structure made of ceramic fiber blocks, in which a refractory block body of ceramic fibers is stacked on a furnace wall for high-temperature heating, and the furnace wall structure is narrower than the longitudinal dimension of the refractory block body by about 5 to 25 mm in the longitudinal direction. , Insert the mounting bolts protruding from the back of the refractory block into the casing of the furnace wall where the mounting holes are opened at regular intervals that are narrower than the horizontal dimension of the refractory block by about 5 to 25 mm. The refractory blocks are compressed vertically and horizontally and stacked, and the sheet-like spacers of the ceramic fiber blanket are inserted between the upper and lower sides of the vertically and horizontally stacked refractory blocks. Furnace wall structure with a characteristic ceramic fiber block.