JP2707195B2 - Fibrous refractory block - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fibrous refractory material block provided with a protective plate such as a stainless steel plate for protecting the surface of a fibrous refractory material, and a fiber provided with a hanger brick for a heater element inside a furnace. Quality refractory blocks.

[0002]

2. Description of the Related Art Conventionally, in a continuous strip annealing furnace, a fibrous refractory material such as a ceramic fiber is used for heat insulation. A fiber blanket insulation module in which the fibrous refractory material is made into a blanket shape and the blanket is folded to form a block so that the fibrous refractory material such as ceramics fiber can be easily attached to the furnace shell of the annealing furnace is disclosed in Japanese Patent Publication No. 23714. No. 6,086,045. In this fiber blanket insulation module, a fiber blanket is skewered with a support bar, and the support bar is attached to a furnace wall steel via a mounting bracket. If necessary, a fold support bar sandwiched between the folds of the fiber blanket is provided orthogonal to the support bar to reinforce the support of the fiber blanket.

[0003] Japanese Utility Model Publication No. Sho 62-36070 discloses a furnace wall structure of a continuous annealing furnace protected by a stainless steel protective plate or the like so that the fiber refractory material is not exposed to the furnace atmosphere. The purpose of this protective plate is to prevent the single fibers in the fibrous refractory from peeling off and damaging the surface of the strip passing through the furnace, or to prevent the strip from directly contacting the fibrous refractory. , To protect the fibrous refractory material. Then, in order to attach this protective plate to the steel shell, a stud bolt which is welded to the steel shell and penetrated through the fibrous refractory material has been used.

[0004] Incidentally, the fiber blanket insulating module disclosed in Japanese Patent Publication No. 23714/1990 also uses a through bolt to attach a protective plate. A furnace wall structure of a continuous annealing furnace having a fiber lining and a heater element is disclosed in JP-A-60-56025.
In this method, a hanger brick for attaching a furnace heater element is provided on a support integrated with a steel shell on a furnace outer wall.

[0005]

However, in a conventional protection plate for protecting a fibrous refractory material block, a stud bolt welded to a furnace wall steel is inserted through the refractory material block. For this reason, the penetrating stud bolt uses a metal material, and since the number of bolts is as large as several thousand, in order to dissipate heat from the furnace to the furnace wall steel shell through the penetrating stud bolt, The thermal efficiency of the furnace was greatly reduced. In addition, when an electric heater element is used in the furnace, there are many cases where the protective plate or the penetrating bolts come into contact with the heater element for some reason, and there is a problem such as electric leakage, and there is also a problem in terms of electric insulation. was there.

Further, the prior art disclosed in Japanese Patent Application Laid-Open No. 60-56025, which has a furnace wall structure of a continuous annealing furnace provided with a heater element, has a support integrated with a steel shell of the furnace outer wall. Since the hanger brick to which the in-furnace heater element was attached was provided, the support and the heat dissipation from the hanger brick were quite large. This is because the support is made of metal and has a high thermal conductivity, and the strength is given priority to the hanger brick, and a material having a high thermal conductivity such as a viscous brick must be used. And the ratio of the hanger brick to the furnace wall area is 1/3.
And the heat conduction area is large, and the heat dissipation is large.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to replace a bolt or a hanger brick for attaching a protective plate or an electric heater element to a fibrous refractory material block by using a furnace wall iron. As a structure to attach it so that it can be thermally or electrically insulated,
An object of the present invention is to provide a fibrous refractory insulation block having a simple thermal efficiency and a simple structure.

[0008]

According to the present invention, there is provided: (1) a protective plate or a protective sheet for protecting a refractory material provided inside a furnace of a folded blanket-shaped fibrous refractory material; A fibrous material comprising: mounting means such as mounting bolts for mounting the protection plate or the protection sheet; and a protection plate mounting beam sandwiched between folds inside the furnace to support the mounting means. Refractory block. (2) The fibrous refractory material block according to the above (1), wherein a mounting means mounting portion of the protection plate is depressed so that a tip of the mounting means such as a mounting bolt does not protrude from the surface of the protection plate. (3) A hanger brick for a heater element is provided inside the furnace of the folded blanket-shaped fibrous refractory material,
A fibrous refractory block comprising a hanger brick mounting beam sandwiched between folds inside the furnace to support the hanger brick. It is.

[0009]

According to the present invention, the protection plate 8 or the protection sheet 16 is
Since the mounting plate 10 is mounted by the protection plate mounting beam 9 having mounting means such as mounting bolts 10 sandwiched between the folds 7 inside the blanket furnace, the mounting bolts 10 are separated from the furnace wall steel 1 by the fibrous refractory material 5. You. Therefore, the mounting bolt 10
From the furnace wall to the furnace wall 1 is blocked. Also, the tip of the mounting bolt 10 does not protrude from the surface of the protection plate 8.
Since the mounting bolt mounting portion of the protection plate 8 is recessed, contact between the strip and the mounting bolt can be avoided, and troubles such as scratching and breakage of the strip are eliminated.

Further, since the hanger brick 17 for the heater element is mounted with the mounting beam 21 which is sandwiched between the folds 7 on the inner side of the furnace, the hanger brick 17 is made of a fibrous refractory material 5 with the furnace wall steel 1. The mounting beam 21 and the furnace shell 1 can be electrically isolated from each other. Therefore, leakage from the heater element 18 is eliminated.
When the protection plate 8 and the heater element 18 are used in combination, even if the protection plate 8 and the heater element 18 come into contact with each other, it is possible to avoid a leak to the furnace wall steel shell 1.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of a first embodiment of the present invention, FIG. 2 is a view taken on line AA of FIG. 1, FIG. 3 is a perspective view of a protection plate mounting beam,
FIG. 4 is a perspective view of a second embodiment of the present invention, in which a mounting bolt portion of a protection plate is depressed, and FIG. 5 is a third embodiment of the present invention, in which a mounting bolt portion is depressed in a vertical groove shape. FIG. 6 is a perspective view of a fourth embodiment of the present invention with a protective sheet such as ceramic fiber attached, FIG. 7 is a perspective view of a fifth embodiment of the present invention with a heater element attached, FIG. 8 is a view taken in the direction of arrows BB in FIG.

First, a first embodiment of the present invention will be described with reference to FIGS. 1, 2 and 3. FIG. A fibrous refractory material obtained by folding a blanket-shaped fibrous refractory material in a modular manner in advance is used as one block 4, and a stainless steel protection plate 8 is provided inside the furnace of the block. Then, two to several protection plate mounting beams 9 for one block 4 are sandwiched between the folds 7 inside the furnace at substantially equal intervals. The number of the protection plate mounting beams 9 is determined so that the pitch is in the range of 100 to 300 mm.

For example, when the length (A) of the block shown in FIG. 1 is about 300 mm, it is appropriate that the number of the protection plate mounting beams is two. When the length of the width (A) of the block shown in FIG. 1 is about 600 mm, three to four pieces are appropriate. Mounting bolts 10 are vertically welded to the protection plate mounting beam 9 at substantially equal intervals. The number of the mounting bolts 10 is suitably two regardless of the length (B) of the block shown in FIG. This is because the mounting bolts 10 pierce and damage the folded portion of the fibrous refractory material, and the minimum number necessary for fixing the protection plate 8 is appropriate. The protection plate 8 is fixed via the mounting bolts 10. In this case, the tensile strength of the blanket-shaped fibrous refractory material 5 is 60 kg or more, and has sufficient strength to fix the protection plate 8 made of stainless steel.

The order of the mounting operation is as follows.
Is fixed to the furnace body 1, and then the protective plate 8 is fixed on the fibrous refractory block 4. Alternatively, after the protection plate 8 is fixed on the fibrous refractory material block 4 in advance, the fibrous refractory material block 4 is fixed to the furnace body hardware 1. Either method can be selected. FIG. 2 shows a case in which the fibrous refractory material block 4 is fixed to the furnace hardware 1, and a fitting 2 for the furnace metal is provided inside the furnace hardware 1, and the fitting for the furnace metal is provided. 2 is inserted into a place where the blanket furnace outer fold 6 is not provided, and the support rod 3 is inserted into the blanket furnace outer fold 6 at right angles to the fold, and the support rod 3 is fixed to the fitting 2 for the furnace body metal fitting. FIG. 3 shows the protection plate mounting beam 9, the mounting bolt 10, the washer 19, and the nut 20.

The tips of the two mounting bolts attached to the protection plate mounting beam 9 project from the surface of the protection plate 8 to the inside of the furnace, and if there is a possibility of contact with the strip, the protection plate 8 is processed. That is, in FIG. 4, the thickness (C) of the fibrous refractory material block 4 obtained by folding the blanket-shaped fibrous refractory material 5 in a modular manner in advance is reduced by a predetermined thickness by about 10 to 20 mm. Stainless steel box-shaped protection plate A1 for protecting the surface of the fibrous refractory material block 4
2 is a box type with a brim having a depth of about 10 to 20 mm, and a portion corresponding to the position of the mounting bolt 10 has a diameter of 10
A protection plate recess 13 having a depth of about 20 mmφ and a depth of 10 to 20 mm is provided.

The head of the mounting bolt 10 has its protection plate recess 13
Do not protrude, and the nut 20 for fixing the protection plate
Of course, it can be accommodated in the protection plate recess 13. A blanket-shaped fibrous refractory material 5 prepared separately is packed in a depth of about 10 to 20 mm of the box-shaped box-shaped protection plate A12.

The box-shaped protection plate A12 has a diameter of 10 to 20 m.
Instead of providing the protection plate depression 13 of about mφ, a protection plate groove 14 may be provided in the vertical direction of the box-shaped protection plate B15 as shown in FIG.

In the present invention, a protective sheet 16 using a ceramic fiber cloth or the like as shown in FIG. 6, for example, may be used other than a stainless steel protective plate on the furnace inner surface of the fibrous refractory material block 4. Furthermore, a ceramic plate or the like may be used instead of stainless steel for the protection plate.

The mounting bolt 10 for mounting the above-described protective plate is not limited to a bolt, but is shown in FIG.
May be used to fix the protection plate by welding only the washer 19, or any other device that can fix the protection plate may be used.

FIG. 7 is a perspective view showing a case where an element hanger brick 17 for suspending a heater for heating the inside of the furnace is attached to the fibrous refractory material block 4. In this figure, the heater 18 and the protection plate are simultaneously connected to the fibrous refractory block 4.
In this embodiment, the protection plate is mounted as described above. The heater 18 is an element hanger 17
The element hanger 17 is supported by a support beam 21 sandwiched between folds 7 inside the furnace of the block.

Conventionally, the element hanger brick is generally fixed to a metal piece welded to a furnace metal piece.
There is a problem that the element hanger brick and its hardware cause a large heat loss, but in the present invention, since the element hanger brick and the furnace body metal are separated, heat radiation is small and thermal efficiency is good. And the protection plate 8
Even if the heater 18 may come into contact with the heater 18, since the mounting beam 21 and the furnace shell 1 are insulated from each other, there is no fear of electric leakage.

[0022]

According to the present invention, since the protection plate mounting beam and the furnace body metal are separated from each other, heat radiation is small and thermal efficiency is good. In the present invention, since the protection plate mounting beam and the furnace body metal are separated, the electric insulation is good, and in the case of a method in which the inside of the furnace is heated by an electric heater, there is no electric leakage accident. Since there is no need to provide a through stud bolt vertically provided on the furnace body metal for fixing the protection plate, conventionally, it is difficult to provide the protection plate on the surface of the fibrous refractory material block due to complexity of work. What was almost impossible can now be easily provided. The order of operation is to fix the protective plate on the fibrous refractory block after the fibrous refractory block is fixed to the furnace body hardware. Alternatively, after the protection plate is fixed on the fibrous refractory material block in advance, the fibrous refractory material block is fixed to the furnace body hardware. Since either method can be selected, the range of selecting the method of attaching the fibrous refractory material block is expanded.

[Brief description of the drawings]

FIG. 1 is a perspective view of a first embodiment of the present invention.

FIG. 2 is a view as viewed in the direction of arrows AA in FIG. 1;

FIG. 3 is a perspective view of a protection plate mounting beam.

FIG. 4 is a perspective view of a second embodiment of the present invention, in which mounting bolt portions of a protection plate are recessed.

FIG. 5 shows a third embodiment of the present invention in which mounting bolts are recessed in a vertical groove shape.

FIG. 6 is a perspective view of a fourth embodiment of the present invention, in which a protective sheet such as a ceramic fiber is attached.

FIG. 7 is a perspective view of a fifth embodiment of the present invention, with a heater element attached.

8 is a view taken in the direction of arrows BB in FIG. 7;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Furnace hardware (furnace wall steel) 2 Metal fittings for furnace body 3 Support rods 4 Fibrous refractory material block 5 Blanket Fibrous refractory material 6 Blanket furnace outer fold 7 Blanket furnace inner fold 8 Protective plate 9 Protection plate Mounting beam 10 Mounting bolt (mounting means) 12 Box-type protective plate A 13 Protective plate recess 14 Protective plate groove 15 Box-type protective plate B 16 Protective sheet 17 Element hanger 18 Electric heater (heater element) 19 Washer 20 Nut 21 Support beam

Claims (3)

(57) [Claims] 1. A protection plate or a protection sheet for protecting a refractory material is provided inside a furnace of a folded blanket-shaped fibrous refractory material, and mounting means for mounting the protection plate or the protection sheet, and the mounting means are provided. A fibrous refractory block comprising a protection plate mounting beam sandwiched between folds on the inner side of the furnace for support. 2. The fibrous refractory material block according to claim 1, wherein the mounting means mounting portion of the protection plate is recessed so that the tip of the mounting means does not protrude from the surface of the protection plate. 3. A hanger brick for a heater element is provided inside the furnace of the folded blanket-shaped fibrous refractory material, and a hanger brick mounting beam sandwiched between folds on the inside of the furnace is provided to support the hanger brick. A fibrous refractory block.