JPH07258644A - Castable block for door leaf of coke oven and door leaf of coke oven - Google Patents

Abstract

PURPOSE:To provide a castable block for a door leaf of a coke oven, which can be produced easily at low cost, enables the prevention and suppression of and protection from the adherence of carbon, the easy removal of carbon adhered on it and the continuous use of it after replacing only unusable parts, has heat-insulating effect and contributes to the acceleration of the progress of dry distillation, the improvement of the yield of blocks of coke, etc., and to provide a door leaf of a coke-oven. CONSTITUTION:This castable block 101 for a door leaf of a coke oven is produced by molding a castable block under oscillation in a reduced pressure atmosphere, applying a glaze on the obtained castable block, drying and baking. A hollow space is made in the block 101. Dividing bricks 23 are placed at the hollow space and through holes 24 are formed in the dividing bricks 23. Further, the block is fixed on an ion cover 21 of the door leaf of the oven through diaphragms with metal fixing-fittings. The objective door leaf of a coke oven is thus obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coke oven door castable block and a coke oven door. In other words, it is easy to manufacture and the manufacturing cost is low. It can prevent and prevent carbon from adhering and can be used for a long time. The adhered carbon can be easily peeled off and removed, and some are not usable. If it is replaced, it can be used for replacement and its life can be extended, it contributes to the promotion of dry distillation near the coke oven door to reduce the variation in the progress of dry distillation in the carbonization chamber, it also contributes to the improvement of the yield of coke lumps, and the work can be reduced It is intended to provide a castable block for a coke oven door and a coke oven door.

[0002]

2. Description of the Related Art Most of various types of coke are produced by dry distillation of charged coal in a room type coke oven. This carbonization is performed by selecting various conditions depending on the type of coke to be produced, the purpose of operation, etc. The carbonization so far takes about 18 to 24 hours including the charging time in the carbonization chamber of the coke oven. Do it. Therefore, the concept of the castable block for the coke oven door and the coke oven door is based on the assumption that the required time is in the operating state.

During the carbonization process, carbon is attached to the surface of the coke oven door on the carbonization chamber side by the tar generated from the raw coal and the hydrocarbon derived from the binder used as an additive. If the carbon deposits are left to grow as they are, it becomes impossible to set the coke oven door in a state in which the coke oven door is in close contact with the furnace body on the side of the carbonization chamber and put it into operation. If they are set and put into operation without being in close contact with each other, the gas calorie gas calorie will decrease due to gas leakage and air intake.For example, in the pig iron integrated steelworks, there is a fatal problem such as an energy balance hindrance. It becomes a factor.

Therefore, conventionally, the furnace door is mechanically cared for to remove the carbon adhering to the furnace and to carry out the caring.
However, these have a problem that the working environment is bad and becomes one of the harsh works especially in the summer. If the carbon is removed mechanically, it will be one of the factors that cause the block made of refractory bricks that compose the coke oven door to drop, which eventually reduces the life of the oven door and There is also an inherent problem of having to renew after a short period of use.

Therefore, various measures have been conventionally proposed for suppressing and preventing carbon deposits themselves on the furnace door of the chamber type coke oven, and for facilitating the detachment of the deposited carbon. However, as far as the present inventor grasps, there is no furnace door etc. of the idea of providing a glaze layer on the refractory castable block to prevent carbon adhesion, and trying to prevent carbon adhesion by applying glaze to the refractory brick. The measures to be taken and others were found.

For example, Japanese Patent Publication No. 52-43483 (structure of coke oven door) uses a refractory brick having a hollow portion as the oven door, and attempts to prevent carbon deposits by the heat insulating effect of the hollow portion. However, this heat insulating effect is not sufficient to prevent carbon deposits and has a limit. Moreover, since refractory bricks are used, the manufacturing cost thereof is high, which is one of the technical problems of the present invention.
There is a problem that the manufacturing is easy and the manufacturing cost is low.

[0007] Further, as a means for coating the surface of refractory bricks with a glaze to prevent carbon deposits, for example, Japanese Patent Laid-Open Publication No. Sho.
There is a 9-174585 gazette (refractory for preventing carbon deposits). In this publication, a base material brick is fired in advance, and thereafter,
The glaze is applied and heated and melted at a temperature equal to or higher than the melting point of the glaze to form a desired glaze layer, and the glaze layer prevents carbon from adhering. However, although the adhesion of carbon is likely to be easy to remove due to the glaze layer and easy to remove, the manufacturing method involves firing twice, which requires the number of days required for manufacturing, and the manufacturing cost is high. It is not possible to satisfy measures such as suppressing and preventing carbon adhesion and facilitating peeling at a low price, which is the main technical problem of the invention.

Further, the applicant of the present invention is disclosed in JP-A-63-236.
Japanese Patent No. 783 proposes a "method for producing a refractory brick for preventing carbon adhesion". This is characterized in that the base material bricks are fired and the glaze layer is welded at the same time for the purpose of solving the problems of the above-cited JP-A-59-174585. However, since the base material is a brick, the low porosity inherent in the brick is one of the factors, which has the drawback that the thermal conductivity is high and the heat dissipation from the furnace door is high. In addition, because it becomes a sleeve medicine construction brick,
One of the factors is that the manufacturing process is complicated, so that the reduction of the manufacturing cost is still difficult to solve.
This is because the brick-based material requires an expensive mold for molding the brick, and thus it is difficult to significantly reduce the manufacturing cost as long as the mold is used.

Further, Japanese Patent Publication No. 25391/1990 (method for manufacturing a coke oven door) proposes that a castable block base material is glazed and fired instead of a fired brick in order to simplify the molding process. ing. However, because the surface of the molding block is not smooth and the glazed state is non-uniform, and the pore distribution of the castable is inadequate, the heat insulating effect cannot be expected and the effect of preventing carbon deposits can not be sufficiently cited. difficult.

By the way, in today's coke production, Nippon Steel Chemical Co., Ltd., which is also the applicant of the present application, is carrying out an epoch-making high-productivity coke production method which drastically reforms the time required for carbonization. (JP-A-2-194087,
"Method for manufacturing blast furnace coke"). In summary, this method is that when charcoal coal is hot-distilled at a high temperature and the coke temperature in the center of the carbonization chamber reaches the range of 700 to 900 ° C, it is kiln-fired,
The coke, which is a product, is manufactured by charging the sensible heat into a pre-chamber of a dry cooling facility (hereinafter referred to as CDQ) and heating and firing.

Therefore, what is discharged from the kiln is a semi-coke having residual volatile matter (VM) derived from charging coal, and this residual volatile matter (VM) is the main fuel for heating and firing in the pre-chamber. Therefore, each of the above cited examples is in principle distinguished from the coke production by carbonization in the carbonization chamber where the above-mentioned references are used, and high productivity that has not been predicted so far, such as reduction of the furnace group and reduction of personnel, has been achieved. However, there is a remarkable unique effect that the production amount can be improved with a small furnace group and the manufacturing cost can be reduced. Therefore, as a measure for extending the life of a coke oven is gaining attention on a national scale, it is also gaining attention as a hand-over hand for the next-generation coke production method on a national scale.

However, this epoch-making coke manufacturing system is
As mentioned above, low temperature (the coke temperature at the center of the carbonization chamber is 7
Since the conditions for dry distillation are such that the kiln can be taken out when the temperature reaches within the range of 00 to 900 ° C., variations in the progress of dry distillation in the carbonization chamber are more likely to occur than in conventional dry distillation methods. Therefore, solving these problems enables production on an even more industrial scale. However, until now, since there is only the proposal of the above-mentioned Japanese Patent Application Laid-Open No. 2-194087, the technical level of those skilled in the art can only be cited to the above. Therefore, the castable block for the coke oven lid and the coke oven lid are carbonized. No mention is made of contributing to solving variations in the progress of dry distillation in the room.

[0013]

In view of the above-mentioned circumstances, the present invention has investigated a furnace door and the like applicable to the epoch-making coke production proposed in the above-mentioned Japanese Patent Laid-Open No. 2-194087. In order to reduce the cost and ease of manufacturing, it was considered that the use of refractory castables is an absolute requirement for implementation on an industrial scale. However, it is known that fire resistant castables are physically difficult to expect to function like fire resistant bricks.

Since the present inventors have overcome such a reality,
As a result of repeated investigations over refractory castables, it was found that the refractory life and carbon adhesion prevention functions, which replace refractory bricks, are due to pore size distribution, air bubbles, and air holes. Therefore, even if the refractory castable has a pore size distribution made of brick, a glaze layer can be provided to prevent and prevent carbon from adhering, and to easily remove the adhered carbon. The present invention is based on this idea, and is intended to achieve the technical problems listed below. Achieving these technical problems is not achieved by the prior art examples cited above. I can't find it. (L) Preventing, suppressing, and preventing the adhesion of carbon generated during carbonization, and easily removing the adhered carbon. (2) Energy can be saved by reducing the heat radiated from the furnace door. (3) Since castable refractory is used, the castable block for the coke oven door or the coke oven door is easier to manufacture and the manufacturing cost is lower than that of the brick molding method. (4) Since the carbonization in the vicinity of the furnace lid in the carbonization chamber is promoted, it contributes to the reduction of the variation in the carbonization progress in the carbonization chamber.
To contribute to the low-temperature kiln removal of semi-coke on an industrial scale. (5) Since it promotes dry distillation near the furnace lid in the carbonization chamber, it contributes to improvement of coke mass yield and reduction of return coal (green coke) when the furnace door is opened. Also eliminate work additions. (6) Coke oven door For the castable block for the coke oven door, which is provided on the iron skin, only the damaged castable block for the coke oven door can be replaced and the oven door can be used again for operation.

[0015]

The present invention is characterized by the following means in order to achieve the above technical problems. First feature: A coke characterized in that a heat-resistant glaze layer is provided on the surface of a castable block that has been vibration molded in a reduced pressure atmosphere, and a metal fitting mounting portion is provided so as to reach a contact surface with a furnace door iron skin. Castable block for furnace door. Second feature: Castable blocks are 90% of the number of pores
The castable block for a coke oven door according to the first feature, characterized in that the above is fine pores having a pore diameter of 1 μm or less. Third feature: The castable block for a coke oven door according to the first feature or the second feature, wherein the castable block is provided with a hollow portion that penetrates the castable block. Fourth feature; for the coke oven door according to the first feature, the second feature, and the third feature, characterized in that partition bricks are provided on both sides and / or one side of the hollow portion that penetrates the castable block. Castable block. Fifth feature: A castable block that is vibration-molded in a reduced pressure atmosphere has a hollow portion penetrating therethrough, and 90% or more of the number of pores of the block are fine pores having a pore diameter of 1 μm or more, and a heat-resistant glaze layer is provided on the surface thereof. , The metal fittings mounting part is provided so as to reach the contact surface with the furnace door iron skin, and the castable block for the coke furnace door, which is configured by partitioning bricks on both sides or one side of the hollow part, is mounted through the fittings. Coke oven door, characterized in that the part is provided on the oven door iron skin. Sixth feature; Castable block for coke oven door,
A fifth feature, characterized in that a plurality of stages are combined so that the hollow portions passing therethrough are in the same center line direction, and the metal fitting mounting portion is provided on the furnace door iron shell through each mounting metal fitting. Coke oven door as described.

More specifically, the means according to the present invention is as follows. That is, by providing a heat-resistant glaze layer on the surface of a castable block vibration-molded in a reduced pressure atmosphere to form a castable block for a furnace door, the technical problems of the present invention listed above are achieved. Further, the caster block for the furnace door is a coke oven door which is provided on an iron skin of the furnace door via a fitting, thereby achieving the technical problems of the present invention listed above.

The pressure condition for vibration molding in the above atmosphere is 4
0 mmHg or less is preferable, more preferably 20 to 40 mm
The range of Hg is good, and the frequency is 2000-12000.
Good times / minutes range.

The above vibration-molded castable block has a sufficient heat insulating property because 90% or more of the number of pores form a fine pore diameter of 1 μm or less. This pore size distribution is based on reduced pressure atmosphere, vibration conditions, castable composition,
It can be adjusted according to the purpose by the particle size configuration and the like.

The surface of the castable block is glazed with a heat-resistant glaze to form a smoother surface so that carbon is less likely to adhere to the castable block. The heat-resistant glaze hinders the technical problem of the present invention. Anything that does not give

Further, the castable block forms a hollow portion inside or on a side surface thereof in the same direction as the height direction of the furnace door by the mold during vibration forming in a reduced pressure atmosphere. This hollow part is provided in the metal fitting mounting part and the furnace door iron skin with the mounting metal fitting in a state of facing the vertical direction. When the hollow portion is provided on the side surface, the hollow portion is provided so that the recessed portion of the hollow portion faces the furnace door skin and is in surface contact.

The castable block for the furnace door configured as described above is provided as it is as it is on the furnace door iron shell through a fitting, or depending on the purpose, it is formed by dividing the block into a plurality of parts. The hollow parts such as are oriented in the vertical direction are overlapped and combined. Partition bricks should be provided only at the combination of these and / or at the top and bottom. This partition brick functions so as to block the hollow portion to retain gas and further exert a heat insulating effect. The hollow portion may be filled with a heat insulating material. In the case of a structure in which a plurality of castable blocks for furnace doors are stacked in this manner, it is possible to replace only the castable blocks for furnace doors that cannot withstand use and use the furnace doors again, so that the manufacturing cost can be reduced. Greatly contribute to.

[0022]

The function of the castable block for the furnace door according to the present invention is as follows.
By adopting low-pressure vibration molding, the pore size distribution after drying or after firing is equal to or less than 1 μm of that of bricks, so that the adhesion of carbon can be suppressed and prevented, or the adhered carbon can be removed. It is possible to obtain a smooth surface condition. In particular, since the vicinity of the furnace door in the carbonization chamber is affected by the outside air temperature outside the furnace door, it is an unavoidable physical phenomenon that delays the progress of carbonization in other carbonization chambers. The contribution is significant on an industrial scale.

Therefore, the castable block for a coke oven door and the coke oven door according to the present invention are proposed by Nippon Steel Chemical Co., Ltd., which is one of the applicants of the present application.
As in Japanese Patent No. 94087 (method for producing blast furnace coke), when the coke temperature at the center of the carbonization chamber reaches a range of 700 to 900 ° C., a semi-coke having a residual volatile content (VM) is kiln-fired. To do on an industrial scale. Therefore, it can be said that it contributes to the production of coke, which is a product by heating and firing semi-coke in a CDQ prechamber with high productivity.

In addition to the above, it is needless to say that the present invention exerts the effect of achieving the technical problem intended by the present invention on the basis of the above construction.

[0025]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. Although the structure of the manufacturing apparatus for manufacturing the castable block for the coke oven door of the present invention (hereinafter sometimes referred to as the castable block for the oven door) is not specified, an embodiment of the apparatus is shown in FIG. In FIG. 1, reference numeral 1 denotes a vacuum container provided on a substrate 4 which is arranged on a work floor 2 via an elastic body 3, and the vacuum container 1 vibrates by a vibrating device 5 attached below the substrate 4. At the same time, a suction pipe 7 connected to a vacuum pump (not shown) via a valve 6 is provided on the side wall of the vacuum container l. Reference numeral 8 denotes a lid provided on the upper portion for maintaining the airtightness of the vacuum container 1, 9 denotes a normal pressure return pipe, which communicates with the atmosphere via a valve 11. Reference numeral 12 denotes a mold arranged inside the vacuum container 1 for manufacturing, shaping, and manufacturing the castable block 10.
A core 15 for forming the hollow portion 13 of the castable block and a core 16 for forming the mounting portion 14 for the mounting bracket are provided.

The castable block 10 is manufactured by using such a manufacturing apparatus. That is, castable refractories having the compositions shown in Examples 1 and 2 of Table 1 were supplied to the mold 12, and then the vacuum container 1 was provided with a lid 8 to maintain airtightness, and the valve 6 was operated. After the air in the vacuum container 1 is sucked from the suction pipe 7 and the vacuum degree reaches 30 mmHg, this state is changed to 15
Hold for ~ 20 minutes, and vibrate 5 for 36 minutes per minute.
A vibration with an amplitude of 2 to 3 mm is applied 00 times. Then valve 1
1 is operated to return to normal pressure, the atmosphere is introduced from the pipe 9 to return the inside of the vacuum container 1 to atmospheric pressure, the lid 8 is opened, and the mold 12 is taken out from the vacuum container 1. Next, the castable block 10 is released from the mold 12. Then, the green body of the block 10 is dried at about 350 ° C.

In Example 1, the castable block 10 that had been dried was coated with a glaze layer to a thickness of 0.3 mm.
It was fired at 0 to 1330 ° C. to obtain a castable block 101 for a furnace door. The castable block 101 for the furnace door had an extremely small surface irregularity and was smooth, and a uniform and smooth glaze layer could be provided. Therefore, when the block is provided on the furnace door for operation, carbon is prevented and prevented from adhering, and the adhering carbon is easily peeled off, for example, so that the removal is easy.

Example 2 was carried out under the same conditions except that the glaze layer of Example 1 was not provided.

Comparative Example 1 was carried out for comparison. This uses the castable refractory material of Comparative Example 1 shown in Table 1, and FIG.
The operation of the vibrating device 5 and the depressurizing device (not shown) of the manufacturing apparatus of No. 1 is stopped, and normal casting is performed with the lid 8 open.
Then, only drying was performed under the same conditions as in Example 1.

[0030]

[Table 1] Table 2 shows the respective physical property values. Comparative Example 2 is based on JI
The characteristics of press-molded clay refractory bricks of S and N3 standard products are shown.

[0031]

[Table 2]

As is clear from Table 2, the quality of the castable block for the coke oven door according to the present invention is good in glazed surface and the porosity does not decrease so much, so that the heat insulating property is large and the coke oven is large. It can be seen that it can be used as a castable block for doors. Further, when a cut brick is provided in the hollow portion, the heat insulating property is further improved.

Further, FIG. 2 shows Example 2 of the present invention and Comparative Example 1
And the pore size distribution of Comparative Example 2 are shown. Example 1 of the present invention,
It can be seen that the castable block that is normally cast is more uniform than Comparative Example 1, and the pore size distribution is equal to or smaller than that of the refractory brick of Comparative Example 2. Therefore, the castable block for the furnace door of the present invention can be sufficiently used for the coke oven door.

FIG. 3 shows the castable block 101 for a furnace door according to the present invention formed in this way, and the coke furnace door 1
The state provided in No. 7 is shown from a plan view. The block 101
Has a mounting portion 14 for mounting metal fittings, which is formed by the core 16 shown in FIG. 1, so that a mounting metal fitting (FIG. 3 shows an anchor bolt) 19 is inserted into the mounting portion 14 and the tip thereof is placed in a furnace. A coke oven door 17 is constructed by penetrating the door iron skin 21 and the diaphragm 22 and screwing and attaching a nut. In addition, 18 shows a glaze layer by cutting out a part of the coke oven door castable block 101.

In FIG. 4, a partition brick 23 is provided in the upper opening of the hollow portion 13 of the furnace door castable block 101 constituting the coke oven door 17 of the present invention shown in FIG. 3, and the lower opening is also partitioned. It is isometric view explanatory drawing which shows the state which provides the brick 23. An example in which a communication hole 24 is provided in the partition brick 23 is shown. When the gas in the hollow portion 13 thermally expands, the communication hole 24 escapes to the carbonization chamber side and has a function of keeping the pressure constant.

Further, since the partition brick 23 effectively stops the convection of the gas in the hollow portion 13, the heat insulating effect is further enhanced. Further, when the gas convection in the hollow portion 13 is heated and expanded by suppressing this convection and the castable block 101 for the furnace door may be damaged, the opening of the communication hole 24 provided in the partition brick 23 is set to the carbonization chamber side. Alternatively, the expansion can be suppressed by providing it toward the outside air. When the opening of the communication hole 24 is provided toward the outside air, a check valve may be provided so that the outside air does not flow in.

The method of providing the hollow portion 13 is not limited to the above-described embodiment, and as shown in FIG. 5, the hollow portion 1 is provided on the furnace door iron shell 21 side.
It is also possible to provide it so that one side of 3 is open, that is, the cross-sectional shape is U-shaped. In this case, it is easy to manufacture the castable block 20 for the coke oven door,
Manufacturing costs can also be reduced.

Furthermore, the castable block 101 for the coke oven door is not limited to the integrated body shown in FIG. 4, and the castable block 101 for the coke oven door is manufactured separately in a plurality of stages in the height direction. Etc. are stacked in the height direction of the coke oven door 17 so that the center lines of the hollow portions 13 are aligned, and the anchor bolts 19 locked by the locking rods 191 are attached to the metal fixture mounting portions 14 as mounting hardware. It is also possible to insert the nut through the furnace door iron shell 21 and screw the nut into the screw. In this case, the advantage is that, when the coke oven door castable block 101 is replaced with a new one, it can be reused when it is damaged or when the carbon adhesion varies depending on the site. The other functions are integrated (unified) Castable block for coke oven door 1
The same as 01.

Furthermore, FIG. 6 shows another castable block 30 for a coke oven door according to the present invention, which is different from the above embodiment in that it is formed in a solid shape. That is, the non-operating surface of the castable block 30 is connected to the coke oven door 17
The metal fittings 26 that come into contact with the furnace door iron skin 21 attached to the metal fittings and are attached to the metal fitting mounting portions 25 provided in the width direction of the castable block 30 (in FIG. 6, a brick holder is shown).
Mating. Then, the non-fitting vicinity 27 of the brick holder 26 is attached to the furnace door iron shell 21 to form the coke oven door 17. The advantages in this case are that since the hollow portion 13 is not provided, the manufacturing is easy and the manufacturing cost can be reduced, and since the robust furnace door castable block 30 can be configured, it contributes to the life extension of the furnace door. Further, since the glaze layer 18 is provided on the surface of the castable block 28, the adhered carbon can be easily removed, and the adherence of the carbon can be suppressed.

[0040]

Since the present invention is constructed and operates as described above, the technical problems intended by the present invention are achieved as listed below. (1) Preventing, suppressing, and preventing the adhesion of carbon generated during dry distillation, and easily removing the adhered carbon. (2) Energy can be saved by reducing the heat radiated from the furnace door. (3) Since the castable refractory is used, the castable block for the coke oven door or the coke oven door is easier to manufacture than the brick molding method, and the manufacturing cost can be reduced. (4) Since the progress of dry distillation in the vicinity of the furnace lid in the carbonization chamber can be promoted, it contributes to improvement of coke mass yield and reduction of return coal (green coke) when the furnace door is opened. Therefore, the work load can be reduced. (5) Coke oven door For the castable block for the coke oven door, which is provided on the iron skin, only the damaged castable block for the coke oven door can be replaced, and the oven door can be used again for operation. Therefore, the cost can be reduced. (6) Since the carbonization in the vicinity of the furnace lid in the carbonization chamber is promoted as in the above (4), it also contributes to the reduction of the variation in the carbonization progress in the carbonization chamber. Therefore, for example, it can contribute to carrying out the low temperature kiln removal of semi-finished coke on an industrial scale as shown in JP-A-2-194087, "Method for manufacturing coke for blast furnace".

[Brief description of drawings]

FIG. 1 is an explanatory view showing an embodiment of a manufacturing apparatus of a castable block for a coke oven door of the present invention.

FIG. 2 is a graph showing pore size distributions of castable blocks according to the present invention, comparative examples, and refractory bricks.

FIG. 3 is an explanatory view showing a coke oven door castable block and a coke oven door provided with a hollow portion according to the present invention in the vicinity of the center in the cross-sectional direction when seen from a plane.

FIG. 4 is a perspective view showing a coke oven door castable block and a coke oven door in which a hollow portion according to the present invention is provided near the center in the cross-sectional direction and a partition brick is provided in the hollow portion.

FIG. 5 is an explanatory view showing a coke oven door castable block and a coke oven door which are provided by abutting a hollow portion of the present invention on a furnace door iron skin when seen from a plane.

FIG. 6 is an explanatory view showing a solid-state coke oven door castable block and a coke oven door according to the present invention when seen from a plane.

[Explanation of symbols]

1 Vacuum container 2 Working floor 3 Elastic body 4 Substrate 5 Vibrating device 6 Valve 7 Suction pipe 8 Lid 9 Normal pressure return pipe 10, 20, 30, 101 Castable block 11 Valve 12 Form 13 Hollow part 14 Mounting part mounting part 15, 16
Core 17 Coke oven door 18 Glaze layer 19 Mounting bracket 191 Locking rod 21 Furnace door iron skin 22 Diaphragm 23 Partition brick 24 Communication hole 25 Bracket mounting part 26 Mounting bracket (brick holder in Fig. 6) 27 Non-fitting vicinity 28 Castable block (solid castable block shown in Fig. 6)

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Yukihiko Maeno 2-10-10, Nagai Saku, Kisarazu-shi, Chiba 13-B2 (72) Inventor Naomichi Ohara 4-12-12 Kiyomi, Kisarazu-shi, Chiba T-2 Building 502 No. (72) Inventor Katsuhiro Oda 2-30 of Yokodai, Kisarazu City, Chiba Prefecture

Claims (6)

[Claims] 1. A coke, characterized in that a heat-resistant glaze layer is provided on the surface of a castable block vibration-molded in a reduced pressure atmosphere, and a metal fitting mounting portion is provided so as to reach a contact surface with a furnace door iron skin. Castable block for furnace door. 2. The castable block has 90 pores.
The castable block for a coke oven door according to claim 1, wherein% or more is fine pores having a pore diameter of 1 µm or less. 3. The castable block is provided with a hollow portion which penetrates the castable block.
Castable block for coke oven door described in. 4. The castable block for a coke oven door according to claim 1, 2, or 3, wherein partition bricks are provided on both sides and / or one side of a hollow portion passing through the castable block. 5. A castable block which is vibration-molded in a reduced pressure atmosphere has a hollow portion penetrating therethrough, and 90% or more of the number of pores of the block are fine pores having a pore diameter of 1 μm or less, and a heat-resistant glaze layer is provided on the surface thereof. , The metal fitting mounting part is provided so as to reach the contact surface with the furnace door iron skin, and the castable block for the coke oven door, which is configured by providing partition bricks on both sides or one side of the hollow part, is mounted through the mounting metal fitting. Coke oven door, characterized in that the part is provided on the oven door iron skin. 6. A coke oven door castable block is assembled in a plurality of stages such that the hollow portions passing through are in the same center line direction, and a metal fitting mounting portion is provided on the furnace door iron shell through each mounting metal fitting. The coke oven door according to claim 5, wherein the door is a coke oven door.