KR20210122826A - Stave for cooling furnace wall of blast furnace - Google Patents

Abstract

There is provided a stave for cooling the furnace wall of a blast furnace in which a liner is provided inside a furnace for cooling the furnace wall, wherein the temperature rise of the liner is prevented and the lifespan of the liner can be increased. A stave for cooling the furnace wall of a blast furnace is provided with a water passage through which cooling water passes, and a stave body 1 made of copper or a copper alloy, and a plurality of horizontal grooves formed horizontally on the furnace inner surface of the stave body a horizontal groove 13 constituting a concave portion composed of a plurality of horizontal grooves and a convex portion formed between the plurality of horizontal grooves, a plurality of vertical grooves 4 formed in the vertical direction in the convex portion between the horizontal grooves, and a stave It is provided with a plurality of liners (2) formed to fit into the horizontal grooves of the main body and protruding into the furnace at their tips, and the gaps (5) in the vertical direction between the plurality of liners are different from the vertical grooves (4) in the horizontal direction. Configure it to be a location.

Description

Stave for cooling furnace wall of blast furnace

The present invention relates to a furnace wall cooling stave used to cool and protect furnace walls, such as blast furnaces, exposed to high temperatures.

BACKGROUND ART Conventionally, a stave for cooling the furnace wall (hereinafter, also referred to as a stave) has been used in order to protect the blast furnace furnace body from thermal load in the furnace. The stave has a stave body made of cast iron, rolled copper, cast copper, etc., and has a cooling channel in the stave body. The stave may be equipped with a member for attaching the stave to the blast furnace, or a metal or refractory material of a different kind from the stave body, on the surface of the stave body. The total body, including the attached members, is called a stave. In recent years, in order to cope with the high thermal load of the blast furnace body, a stave having a higher cooling capacity and durability has been demanded.

The reason for this is that the resource depletion of raw coal suitable for the production of coke, which is the main reducing material of the blast furnace, is progressing, and the amount of pulverized coal blowing in from the tuyere of the blast furnace instead of the coke is increasing. This is because, when the injection amount of pulverized coal is increased, the ventilation resistance in the furnace increases, and as a result, the airflow rising along the furnace wall increases, and as a result, the thermal load of the stave increases and the lifespan becomes shorter.

Such a furnace wall cooling stave is fixedly attached to the inner side of the blast furnace furnace using a furnace shell and bolts. That is, as the example is shown in FIG. 5, the stave main body 51 is being fixed to the shell 61 of a blast furnace body by screwing using the bolt 52 and the nut 53. The water supply and drainage pipes 54-1 and 54-2 of the stave body 51 are formed through a hole 62 drilled in the shell 61 of the blast furnace body, and the water supply and drainage pipes 54-1 , 54-2) through which water is supplied and drained from the outside of the furnace body.

As a technology for improving furnace wall cooling stave, conventionally, even when the refractory material inside the furnace is damaged by long-term use at a point where the heat load of the blast furnace is high, it is insulated by the formation of a stable slag adhering layer generated from the blast furnace contents, thereby prolonging the lifespan. In order to extend, it is known to form a groove-shaped structure in which the contents of the blast furnace are easily deposited inside the furnace of the stave body. Moreover, in order to suppress the deformation|transformation of the stave by a heat|fever, it is known to form the groove|channel extending in the direction of a coolant pipe line on the surface of a stave main body (patent document 1). Moreover, in order to heighten the effect of protecting a stave, it is known to form the liner by the heat-resistant metal material fitted to the horizontal groove|channel of a stave main body (patent document 2).

Japanese Laid-Open Patent Publication No. 2003-269867 Japanese Laid-Open Patent Publication No. 2000-119713

However, as in Patent Document 1, when a vertical groove is formed among a plurality of grooves for preventing deformation by attenuating elongation due to heat from inside the furnace, there is an airflow rising along the vertical groove. As a result, the slag fixing layer is excluded by the airflow, and at the point where the vertical groove exists, the slag fixing layer is not formed in that part, and the heat input to a stave from this point becomes large. Therefore, even if a structure for absorbing deformation due to heat by a vertically penetrating groove was adopted, there was a problem in that the temperature rises rather than receives heat from the inner surface of the groove, thereby weakening the effect of absorbing deformation.

In addition, as in Patent Document 2, even if a liner is formed so that heat is not directly transmitted to the stave inside the furnace of the stave, when the liner surface is smooth, the slag fixing layer is not formed inside the furnace , the liner surface is directly exposed to the high-temperature in-furnace airflow. Therefore, since the temperature of the liner rises, the life of a liner becomes short, and there existed a limited problem in the stave protection effect. In particular, when the liner is fixed with bolts from the inside of the furnace, the bolt temperature becomes higher than the liner temperature and the life of the bolt is shortened.

An object of the present invention is a furnace wall cooling stave used to cool and protect furnace walls such as a blast furnace exposed to high temperatures, in which a liner is formed inside the furnace for cooling the furnace wall, in which the temperature rise of the liner is prevented and to provide a stave for cooling the furnace wall of a blast furnace, which can extend the life of the liner.

As a result of earnest research in order to solve the above-mentioned subject which the prior art has and to implement|achieve the said objective, the inventors came to develop the stave for furnace wall cooling of the novel blast furnace described below. That is, the present invention is a stave for cooling the furnace wall for cooling the furnace wall of a blast furnace from the inner surface, the stave body comprising copper or copper alloy while forming a channel through which cooling water passes therein, and the furnace of the stave body A plurality of horizontal grooves formed horizontally on the inner surface, a horizontal groove constituting a concave portion composed of a plurality of horizontal grooves and a convex portion formed between the plurality of horizontal grooves, and a plurality of vertical grooves formed in the vertical direction in the convex portion between the horizontal grooves; , characterized in that it is formed to fit into the horizontal groove of the stave body and includes a plurality of liners whose tips protrude into the furnace, and the vertical gaps between the plurality of liners are at different positions in the horizontal direction from the vertical grooves. It is a stave for furnace wall cooling of a blast furnace.

Moreover, in the stave for furnace wall cooling of the blast furnace which concerns on this invention comprised as mentioned above,

(1) A drill hole and a bolt hole penetrating into the drill hole are formed from the inside of the furnace of the liner, and a female screw hole is formed in a position corresponding to the bolt hole in the bottom of the horizontal groove of the stave body. Formed by fitting the liner into the horizontal groove by inserting a bolt from the inside of the furnace through the drilling hole and the bolt hole to fix the bolt to the female screw hole,

(2) configured so that the width in the vertical direction of the concave portion is larger than the width in the vertical direction of the convex portion;

(3) that the material of the liner is made of a material having a higher high temperature strength than that of the stave body;

(4) the gaps of the liners adjacent up and down are different in position in the horizontal direction;

(5) the vertical grooves adjacent up and down to different positions in the horizontal direction,

(6) the vertical grooves adjacent to each other have different positions in the horizontal direction while the gaps of the liners adjacent up and down are different in the horizontal direction;

It is thought that this becomes a more preferable solution.

According to the stave for cooling the furnace wall of the blast furnace of the present invention, since the liner protrudes into the furnace, the tip of the convex part between the horizontal grooves between the liners and the base of the liner (the part where the liner is fitted into the recess of the stave body) In the vicinity), a slag fixing layer with low thermal conductivity is formed and maintained. Accordingly, the temperature rise of the liner is hindered. It can extend the life of the liner. In addition, since the gap in the vertical direction between the liners was set to a position different from the vertical groove formed in the convex portion of the stave body so that the grooves did not communicate in the vertical direction, the air flow rising along the vertical groove was obstructed and the slag fixing layer In addition, the lifespan of the liner and the stave can be increased by preventing the gap between the liners and heat from the inner surface of the vertical groove.

Further, according to a preferred example of the present invention, a slotted hole and a bolt hole penetrating from the inside of the furnace of the liner are formed, and a female screw is formed at a position corresponding to the bolt hole at the bottom of the horizontal groove of the stave body. A hole is formed, and a bolt is inserted from the inside of the furnace through the drilling hole and the bolt hole, and the bolt is fixed to the female screw hole. For this reason, while preventing the horizontal movement of the liner positions during use and preventing the vertical gap between the liners from becoming the vertical groove positions, the gap between the liners can be kept constant. In addition, since a slag fixing layer is formed in the drilling hole and the stave body is effectively cooled by the liner and the stave body fitted on three surfaces of the upper surface, the lower surface and the bottom surface, the bolts are not worn even by long-term use.

In addition, according to another suitable example of the present invention, by varying the positions of the gaps in the horizontal direction between the up and down adjacent liners, the airflow is prevented from escaping through the gaps between the liners, and The service life of the liner can be extended by preventing the exclusion and heat from the inside of the vertical groove and the gap in the vertical direction between the liners. Furthermore, according to another suitable example of the present invention, by varying the positions of the vertical grooves adjacent up and down, the vertical grooves penetrate and prevent the airflow from escaping, thereby preventing the exclusion of the slag adhering layer by the airflow. Together, water heat from the inner surface of the vertical groove can be prevented, and the life of the stave can be increased. In addition, when the positions of the vertical gaps between the adjacent liners are different and the vertical grooves adjacent to each other are different, the effect of extending the life of the stave can be further improved.

BRIEF DESCRIPTION OF THE DRAWINGS It is the figure which looked at the example of the stave for furnace wall cooling of the blast furnace of this invention from the furnace inside.
FIG. 2 : is sectional drawing along the AA line of the stave for furnace wall cooling of the blast furnace of this invention shown in FIG. 1. FIG.
3 : is the figure which looked at the example of the stave for furnace wall cooling of the blast furnace of this invention before attaching a liner from inside a furnace.
Fig. 4 is a cross-sectional view taken along line AA of the stave before attaching the liner shown in Fig. 3 .
It is a figure for demonstrating the method of fixing the stave for furnace wall cooling in a prior art example to a furnace shell shell.

Hereinafter, the stave for furnace wall cooling of the blast furnace of this invention is demonstrated.

A stave for cooling a furnace wall of a blast furnace of the present invention comprises: a stave body formed of copper or a copper alloy while forming a channel for passing cooling water therein; A plurality of horizontal grooves formed so as to extend horizontally on the inner surface of the furnace of the stave body, the horizontal grooves comprising: a concave portion composed of a plurality of horizontal grooves and a convex portion formed between the plurality of horizontal grooves; a plurality of vertical grooves formed so as to extend in the vertical direction to the convex portions between the horizontal grooves; a plurality of liners formed to fit into the horizontal grooves of the stave body, the tips of which protrude into the furnace, and the gaps extending in the vertical direction between the plurality of liners are positioned at different positions in the horizontal direction from the vertical grooves; That is, the gap extending in the vertical direction between the plurality of liners is configured not to communicate with the vertical groove.

To ensure that the gap does not communicate with the groove, either or both of the upper and lower ends of the groove are closed in the vertical direction by a liner, and the space constituting the groove is opened only in the direction of the furnace inner surface. indicates state. In this invention, it is preferable that 70% or more of the upper and lower ends of the groove|channel which exists in a stave main body are closed. It is more preferable that 90% or more of the upper and lower ends of the grooves are closed by the liner, and it is most preferable that they are closed at all positions.

In a stave that cools the furnace wall of a blast furnace from the inner surface by blowing high-temperature air from the lower part of the blast furnace to blow the generated gas from the upper part, when the velocity of the gas flow in the upward direction along the stave surface increases, the stave The heat transfer rate of the inner surface becomes large, and it becomes easy to raise the temperature of a stave. In the stave for furnace wall cooling of the blast furnace of the present invention having the above-described configuration, since the stave is made of copper or copper alloy having high thermal conductivity, the furnace inner slag is cooled on the furnace inner surface of the stave to form a fixing layer. Thereby, the stave itself can be protected over a long period of time. Moreover, in the stave for furnace wall cooling of the blast furnace of this invention, water flows through the cooling water passage provided in the stave main body, and a stave is cooled.

A plurality of horizontal grooves are formed in the furnace inner surface of the stave body horizontally. And a concave part is comprised by a some horizontal groove|channel, and a convex part is comprised between the several horizontal groove|channel or between a horizontal groove and the edge part above or below a stave main body. In the horizontal groove of the stave body, a liner is formed that fits into the upper and lower surfaces of the stave body and the tip protrudes into the furnace. It is preferable that the material of the liner has higher hardness and high temperature strength and lower thermal conductivity than that of the stave material. Therefore, while being able to endure even if temperature rises from a stave main body, the heat transmitted to a stave main body can be reduced. Since the liner protrudes into the furnace, a slag fixing layer with low thermal conductivity is formed and maintained also at the tip of the convex portion between the horizontal grooves between the liners and at the base of the liner. The lower part, where the liner fits into the horizontal groove of the stave, is cooled by the stave and maintained at a low temperature, but the tip protruding into the furnace receives heat from the furnace and becomes high temperature.

A groove is formed in the convex portion adjacent to the horizontal groove of the stave body so as to intersect the extending direction of the convex portion. This groove has an opening connected to the end of the horizontal groove or stave existing at the upper end and the lower end of a convex part, and is formed so that the opening may be connected. In this invention, although the groove|channel formed in the convex part is called a vertical groove|channel, it is not limited to a 90 degree direction in the extending direction of a convex part. By having this groove|channel, the deformation|transformation by the thermal stress which generate|occur|produces in the stave main body by a temperature change can be relieve|moderated. The width of the vertical groove is preferably 1 mm or more and 50 mm or less. More preferably, they are 8 mm or more and 30 mm or less. Although the depth of a vertical groove|channel can be made into the same depth as a horizontal groove|channel, it is effective also in a groove|channel shallower than that. It is preferable that it is a groove with a depth of 1/2 or more of the protrusion height of a convex part (distance of the upper end of a convex part and the bottom surface of a groove). A more preferable depth of the groove is about 3/4 to about 1 times the protrusion height of the convex portion. Moreover, it is preferable that the vertical groove|channel formed in the convex part is formed in the space|interval of 100 mm - 500 mm in a horizontal direction. Moreover, it is more preferable to form the space|interval of a vertical groove|channel to 150 mm - 300 mm according to the pitch of a cooling water channel.

The liner fitted into each horizontal groove is divided into a plurality of lines, and thermal expansion is absorbed by the gap in the vertical direction between the liners. If the gap between the liners is in the same vertical position as the vertical groove of the stave body, the gap and the vertical groove penetrate through and the airflow escapes. Therefore, while the slag adhering layer is removed by the airflow, the temperature rises in order to receive heat from the gap between the liners and the inner surface of the vertical groove. However, by setting the position of the gap between the liners and the position of the vertical groove to different positions in the horizontal direction, it is possible to prevent the airflow from escaping and effectively absorb thermal expansion.

Next, a suitable example of the stave for furnace wall cooling of the blast furnace of this invention is demonstrated.

First, simply by fitting the liner into the horizontal groove of the stave body, the position of the liner moves in the horizontal direction during use, so that the position of the vertical gap between the liners may become the position of the vertical groove. In order to prevent this and keep the gap between the liners constant, a drilling hole is drilled inside the furnace of the liner, a bolt hole is drilled at the bottom of the drilling hole, and a bolt is passed through the bolt hole, and the stave body By fixing it to the female threaded hole formed in the horizontal groove of the liner, it is possible to prevent the liner from moving in the horizontal direction. Since the bolt itself is cooled by the female thread hole of the stave body, and a slag fixing layer with low thermal conductivity is formed in the drilling hole, the temperature increase of the bolt can be avoided. In addition, the drilling hole drilled in the liner is drilled deeper outside the furnace than the tip of the convex part between the horizontal grooves of the stave, and the position of the bolt is effectively cooled by the stave body fitted on the liner and the three surfaces of the top, bottom, and bottom. Therefore, the temperature rise of the bolt can be avoided, and the bolt is not worn out even by long-term use. According to the fixing method of the liner of the present invention, as compared with the conventional fixing method of the liner, it is possible to effectively prevent the liner from falling off or breakage, and the lifespan of the liner can be significantly increased. Accordingly, the life of the stave can also be significantly increased.

Next, it is preferable to configure so that the width in the vertical direction of the concave portion of the stave body becomes larger than the width in the vertical direction of the convex portion. By configuring in this way, since the convex portion between the horizontal grooves directly receives the heat in the furnace and becomes higher than the temperature of the horizontal groove, the width of the convex portion can be made smaller than that of the concave portion, and the amount of heat received by the convex portion can be reduced. In addition, since the liner protrudes into the furnace rather than the tip of the convex portion between the horizontal grooves of the stave, a slag fixing layer with low thermal conductivity is formed in the gap between the up and down adjacent liners.

In addition, the material of the liner is preferably composed of a material having a higher high-temperature strength than that of the stave body. As an example of the material of a liner which high temperature strength is higher than the stave body which consists of copper or a copper alloy, stainless steel, SS steel, etc. can be used suitably.

In addition, by differentiating the horizontal position of the gap between the up and down adjacent liners, the gap between the liners penetrates and the airflow is prevented from escaping, thereby preventing the slag adhering layer from being excluded by the airflow, and between the liners It is possible to prevent water heat from the inner surface of the gap and the vertical groove. The gap between the liners is preferably 5 mm or more and 500 mm or less. Varying the horizontal position of the gaps between the liners means disposing the liners so that the protrusions of adjacent liners are located directly above and/or directly below the gaps between the liners of a certain height. Therefore, it is preferable that the space|interval of the clearance gap formed between liners is shorter than the length of the liner arrange|positioned in a groove|channel. In the gap of 70% or more of the number of gaps between the liners, it is preferable that the gap is different from the gap in the horizontal direction from the gap of the liners adjacent up and down.

Moreover, when a liner wears out or falls off by long-term use, a slag fixing layer with low thermal conductivity is formed in the horizontal groove|channel of a stave main body. In that case, by differentiating the horizontal positions of the vertical grooves adjacent up and down, the vertical grooves penetrate and the airflow is prevented from escaping, thereby preventing the slag adhering layer from being removed by the airflow, and the vertical grooves from the inner surface of the vertical grooves. sequence can be avoided.

Different horizontal positions of vertical grooves adjacent up and down means that, in the stave body convex part of a certain height, the stave body convex part adjacent to the directly above and/or directly below the opening of the vertical groove is positioned vertically. to place a home. Also in this case, in 70% or more of the vertical grooves, it is preferable that the horizontal position of the vertical groove is different from the position of the vertical groove of the adjacent convex portion.

In addition, by forming both of the above-mentioned different horizontal positions of the gaps between the vertically adjacent liners, and the different horizontal positions of the above-mentioned vertically adjacent vertical grooves, Prevention of exclusion of the slag adhering layer can be performed more effectively.

Example

An embodiment of the present invention will be described with reference to the drawings.

1 : is the figure which looked at the inside of the furnace inner side of an example of the stave for furnace wall cooling of the blast furnace of this invention, and FIG. 2 is a sectional view taken along the line A-A of the stave for furnace wall cooling of the blast furnace of this invention shown in FIG. Hereinafter, with reference to FIG. 1 and FIG. 2, the structure of the stave for furnace wall cooling of the blast furnace of this invention is demonstrated.

In the example shown in FIG. 1 and FIG. 2, many stave main bodies 1 are arranged in the circumferential direction of a blast furnace, and oxygen-free copper is used for the material as an example. A plurality of liners 2 are fitted with a gap 5 in the vertical direction (up and down direction in the diagram) between the liners 2 in a horizontal groove 13 dug into the stave body 1 by cutting. , are fastened by bolts (3) with hexagon sockets. An example of the dimensions of the horizontal groove 13 is a trapezoidal shape with a depth 13a of 55 mm, a vertical width of 75 mm at the bottom 13b and 70 mm at the opening 13c, and wide inside. Therefore, the liner 2 fitted to the horizontal groove 13 does not come off. In addition, since the liner 2 is fitted in the horizontal groove 13 and then fixed in the horizontal direction by the bolt 3, the width of the gap 5 in the vertical direction between the liners 2 is changed by an external force. There is no work, and the initial 10 mm can be maintained as an example.

A concave portion 21 is formed by the horizontal groove 13 , and a convex portion 22 is formed between the upper and lower horizontal grooves 13 . In this example, in the formed convex part 22, the some perpendicular|vertical groove|channel 4 is formed by cutting, as an example, in width 10mm, and depth 55mm. The plurality of vertical grooves 4 are all arranged at positions shifted from the vertical gaps 5 between the liners 2 in the horizontal direction. Therefore, in the furnace of the blast furnace, the vertically rising air flow does not escape, and the slag fixing layer formed on the inner surface of the furnace is held by the liner 2 .

Moreover, in this invention, the position in the horizontal direction of the clearance gap 5 of the vertical direction of the liner 2 adjacent up and down, and the position in the horizontal direction of the vertical groove|channel 4 adjacent up and down are not specifically limited. However, as a preferred example, as shown in Figs. 1 and 2, it is preferable to configure the gaps 5 in the vertical direction of the up and down adjacent liners 2 to be different in position in the horizontal direction. When the gap 5 in the vertical direction of the liner 2 is formed in this way, it is possible to more suitably prevent the vertically rising airflow from escaping when the liner 2 is present. Moreover, as a suitable example, as shown in FIG.1 and FIG.2, it is preferable to comprise so that the position of the horizontal direction of the vertical groove|channel 4 adjacent up and down may differ. When the vertical grooves 4 are configured in this way, even when the liner 2 is worn out or detached due to long-term use, since the upper and lower vertical grooves 4 are in a position shifted in the horizontal direction, the air flow rising vertically There is no escape, and the slag fixing layer formed on the inner surface of the furnace is maintained.

It is sectional drawing along the line A-A of the stave for furnace wall cooling of the blast furnace of this invention shown in FIG. 1. FIG. In the example shown in FIG. 2, the horizontal groove 13 whose bottom side is wide is dug into the stave main body 1 which is a board|plate of a new copper product of predetermined thickness. The cooling water passage 6 arranged in the vertical direction of the stave is drilled upward by a gun drill from the lower end surface of the plate, and stops without passing through. In this state, in the cooling water passage 6 , a water supply port 7 and a drain port 8 are drilled in the same diameter as the cooling water passage 6 from the rear surface corresponding to the outside of the furnace of the stave. A water supply pipe 9 for supplying cooling water from outside the furnace through the shell of the blast furnace is provided to the water supply port 7, and a drain pipe 10 for discharging cooling water through the shell of the blast furnace to the outside of the furnace is provided to the drain port 8, respectively. It is attached to the stave body 1 by fillet welding. The hole below the cooling water passage 6 is sealed by welding the plug 11 in a V shape.

The liner 2 is horizontally inserted along the horizontal groove 13 dug into the stave body 1, and is fastened with the bolt 3 at a predetermined position. Since the bolt 3 is at the bottom of the drilling hole 12, it is tightened with a hexagon wrench using a bolt with a hexagon socket. In the furnace, since the slag fixing layer is also formed in the drilling hole 12, the head of the bolt 3 can be protected. The drilling hole 12 is drilled deeper than the tip of the convex portion 22 between the horizontal grooves 13 so that the temperature of the bolt 3 does not rise.

Fig. 3 is a view of an example of a stave before mounting a liner in the stave for cooling the furnace wall of a blast furnace according to the present invention, as viewed from the inside of the furnace, and Fig. 4 is a view of the stave before mounting the liner shown in Fig. 3 . It is a cross-sectional view taken along line AA. In the example shown in FIG.3 and FIG.4, the horizontal groove|channel 13 is dug into the stave main body 1 by phrase processing. In the bottom of the horizontal groove 13, a female threaded hole 14 for fixing the liner 2 to the bolt 3 and the bolt is drilled by tapping. This female screw hole 14 is formed at a position where the cooling water passage 6 is shifted in the horizontal direction so as not to penetrate the cooling water passage 6 . After the cutting and welding are finished, a plurality of liners 2 fitted into the horizontal grooves 13 are sequentially fitted from the side. At the place where the centers of the female threaded hole 14, the drilling hole 12, and the concentric bolt hole 23 coincide, it is tightened with the bolt 3 and sliding along the horizontal groove 13 stop

Industrial Applicability

The stave for cooling the furnace wall of a blast furnace according to the present invention is particularly effective as a stave for cooling the furnace wall of a blast furnace from the inner surface by blowing high-temperature air from the lower part of the furnace to blow out generated gas from the upper part. Also in (爐) etc., it is effective as a use for cooling and protecting the inside of a furnace wall exposed to high temperature.

1: Stave body
2: liner
3: Bolts with hexagon sockets
4: vertical groove
5: gap
6: coolant passage
7: water inlet
8 : drain hole
10: drain pipe
11: Plug
12 : digging hole
13: horizontal groove
13a: depth
13b: bottom
13c: opening
14: female thread hole
21: recess
22: convex part
23 : bolt hole

Claims (7)

A stave for cooling the furnace wall for cooling the furnace wall of a blast furnace from the inner surface, the stave body made of copper or copper alloy while forming a channel through which cooling water passes, and the furnace inner surface of the stave body A plurality of horizontal grooves formed horizontally, a horizontal groove forming a concave portion formed of a plurality of horizontal grooves and a convex portion formed between the plurality of horizontal grooves, a plurality of vertical grooves formed in the vertical direction in the convex portion between the horizontal grooves, A blast furnace comprising a plurality of liners formed to fit into the horizontal grooves of the main body and the tips projecting into the furnace, wherein vertical gaps between the plurality of liners are at different positions in the horizontal direction from the vertical grooves. of furnace wall cooling stave. The method of claim 1,
Forming a slotting hole and a bolt hole penetrating into the drilling hole from the inside of the furnace of the liner, and forming a female threaded hole at a position corresponding to the bolt hole in the bottom of the horizontal groove of the stave body, , by inserting a bolt from the inside of the furnace through the drilling hole and the bolt hole and fixing the bolt to the female screw hole, thereby fitting the liner into the horizontal groove and forming the liner for cooling the furnace wall of a blast furnace stave. 3. The method according to claim 1 or 2,
A stave for cooling the furnace wall of a blast furnace, characterized in that the width in the vertical direction of the concave portion is larger than the width in the vertical direction of the convex portion. 4. The method according to any one of claims 1 to 3,
A stave for cooling the furnace wall of a blast furnace, characterized in that the material of the liner is made of a material having a higher high-temperature strength than that of the stave body. 5. The method according to any one of claims 1 to 4,
A stave for cooling the furnace wall of a blast furnace, characterized in that the gaps between the vertical and adjacent liners are positioned differently in the horizontal direction. 5. The method according to any one of claims 1 to 4,
The vertical grooves adjacent up and down have different positions in the horizontal direction, characterized in that the stave for cooling the furnace wall of the blast furnace. 5. The method according to any one of claims 1 to 4,
A stave for cooling the furnace wall of a blast furnace, characterized in that the gaps of the vertically adjacent liners have different positions in the horizontal direction, and the vertical grooves adjacent up and down have different positions in the horizontal direction.

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