JP5545963B2 - Blast furnace tuyere block structure - Google Patents

Description

  The present invention relates to the shape of a blast furnace tuyere block which is a tuyere refractory structure that blows high-temperature air into a blast furnace.

In a blast furnace, a tuyere is provided as an air blowing port for blowing air heated to a high temperature in a hot blast furnace into the blast furnace as is well known. A plurality of tuyere are provided along the circumferential direction of the blast furnace in the middle part near the lower part of the height direction of the blast furnace.
As shown in FIG. 16, in the blast furnace tuyere block 100, the tuyere 108 is composed of a substantially cylindrical tuyere fitting 109 made of metal, and around the tuyere fitting 109, there are a plurality of refractory wings. The mouth blocks 101, 102, 103, 104, 105, 106 are used for holding. The blast furnace tuyere block 100 is conventionally formed by combining a plurality of refractories as shown in the figure.

  However, since the blast furnace tuyere block 100 adopts the combination structure as described above, the surroundings and the refractory part and the metal part of the blast furnace tuyere block 100 itself are thermally expanded by receiving heat during operation of the blast furnace. Thus, there has been a problem that the refractory forming the blast furnace tuyere block 100 is displaced.

  Therefore, for example, in Japanese Patent No. 2806006, the joint 8 of adjacent tuyere blocks as shown in FIG. 23 has a structure in which, for example, the tuyere 108 does not line up (does not penetrate) in the radial direction of the tuyere 108. A contrivance has been proposed to make it difficult for occurrence of deviation (lateral deviation) in the blast furnace circumferential direction between the tuyere blocks forming the mouth block 100.

Japanese Patent No. 28326006

However, the structure described in the above-mentioned patent document can only prevent lateral displacement in each tuyere block, and the tuyere block's vertical displacement (vertical displacement) and the tuyere's longitudinal displacement (protrusion). ) Cannot be prevented.
Therefore, when a vertical displacement occurs, the tuyere hardware 108 and each tuyere block 101, 102, 103, 104, 105, 106 may interfere and damage the tuyere hardware 108 in the tuyere block. In addition, the tuyere blocks were sometimes damaged.
For example, if there is a vertical joint that penetrates vertically in the tuyere block, abnormal expansion due to thermal expansion or alteration of the tuyere lower lining occurs, resulting in partial uplifting and height difference, resulting in structural instability. There was a fear.

  An object of the present invention is a blast furnace tuyere block shape which can prevent lateral displacement, vertical displacement and forward / backward displacement between blast furnace tuyere blocks, and has high bond strength and high structural stability. An object of the present invention is to provide a blast furnace tuyere block shape that can suppress interference with the block and avoid such damage.

The above problems can be solved by the inventions described in the following (1) to ( 6 ).
(1) A structure of a blast furnace tuyere block according to the present invention is a structure of a blast furnace tuyere block in which a plurality of blast furnace tuyere blocks configured so that a tuyere supplying high-temperature air passes through the blast furnace is arranged. There,
The blast furnace tuyere block is divided into a plurality of blocks in the vertical direction, has horizontal joints between the blocks, and has a structure surrounding the tuyere hardware constituting the inner wall of the tuyere with the plurality of blocks over the entire circumference. ,
At least one key member that bites into both side walls is installed on the side wall that forms the joint between the blast furnace tuyere blocks ,
The key member is installed substantially parallel to the central axis of the tuyere, and the installation position is such that the center of at least one key member is 15 from the lower wall surface of the blast furnace tuyere block to the total height of the blast furnace tuyere block. It is comprised so that it may become a position of -35% . (Claim 1)

  Thus, when the key member is installed on the side wall that forms the joint when arranging a plurality of blast furnace tuyere blocks, when the blast furnace tuyere blocks are combined, the key member prevents the blocks from shifting. Bonding strength can be strengthened.

(2) construction of the blast furnace tuyere block according to the present invention is characterized in that the key member at the intersection between the previous SL horizontal joint with a joint between the blast furnace tuyere block is installed (claims 2 )
In this way, by providing the key member at the position where the horizontal joint and the vertical joint intersect, it is possible to configure the joints connected to the left and right and up and down so that they are not straight with the key member. Can be prevented at the same time.

( 3 ) The structure of the blast furnace tuyere block according to the present invention is such that the wall of the lowermost block among the plurality of blocks is substantially parallel to the central axis of the tuyere and the center thereof is the blast furnace tuyere block. The key member which is the installation position of 15 to 35% of the total height of the blast furnace tuyere block from the lower side wall surface is provided. (Claim 3 )

( 4 ) The structure of the blast furnace tuyere block according to the present invention is characterized by being installed so as to be exposed on the joint surface between the blast furnace tuyere blocks . (Claim 4 )

  Thus, by providing the key member so as to be exposed to the joint, when installing the key member, the key member can be inserted and inserted into the opened groove after arranging the tuyere blocks, Excellent bond strength between blocks and workability of blocks.

( 5 ) The structure of the blast furnace tuyere block according to the present invention is characterized in that the key member is provided over the entire length of the joint between the blast furnace tuyere blocks . (Claim 5 )

  Thus, by providing the key member with a length over the entire width of the joint between the tuyere blocks, the key member can be disposed so as to be exposed on the front and back of the joint. After arranging the mouth blocks, they can be inserted from either direction of the front and back of the block, and the bonding strength between the blocks and the workability of the blocks are excellent.

( 6 ) The structure of the blast furnace tuyere block according to the present invention is characterized in that the key member is disposed so as not to be exposed on the joint surface between the blast furnace tuyere blocks . (Claim 6 )

  In this way, the key member has a length that does not cover the entire width of the joint between the tuyere blocks so as not to be exposed from the joint, thereby preventing damage to the joint and improving durability. it can. Furthermore, if this key member is disposed, the block-to-block misalignment prevention function can prevent misalignment between blocks in the up-down direction, the left-right direction, and the front-rear direction, and the resistance to the protrusion of the tuyere block, for example, is increased. , Structural stability can be enhanced.

  The shape of the blast furnace tuyere block according to the present invention is such that a key member is installed on a side wall constituting a joint when arranging a plurality of blast furnace tuyere blocks. The binding force can be strengthened by utilizing the hooking action of the key member against the displacement, and the structural stability of the structure of the blast furnace tuyere block over the long term can be enhanced. In addition, since the displacement between the tuyere blocks can be suppressed, damage to the tuyere hardware and the tuyere block itself can be suppressed.

It is a perspective view of the blast furnace tuyere block of a 1st embodiment concerning the present invention. It is a perspective view which shows the state arranged when manufacturing the structure of the blast furnace tuyere block shown in FIG. It is sectional drawing of the part along the AA line of FIG. It is a perspective view of the blast furnace tuyere block of a 2nd embodiment concerning the present invention. It is a perspective view which shows the state which arranged when manufacturing the structure of the blast furnace tuyere block shown in FIG. It is a perspective view of the blast furnace tuyere block of a 3rd embodiment concerning the present invention. It is a perspective view which shows the state arranged when manufacturing the structure of the blast furnace tuyere block shown in FIG. It is a perspective view of the blast furnace tuyere block of a 4th embodiment concerning the present invention. It is a perspective view which shows the state which arranged when manufacturing the structure of the blast furnace tuyere block shown in FIG. It is a perspective view of the blast furnace tuyere block of a 5th embodiment concerning the present invention. It is a perspective view which shows the state which arranged when manufacturing the structure of the blast furnace tuyere block shown in FIG. It is sectional drawing of the part along the CC line of FIG. It is a perspective view which shows the modification of the key brick installed in the groove | channel formed in the blast furnace tuyere block concerning this invention. It is a perspective view which shows the modification of the key brick installed in the groove | channel formed in the blast furnace tuyere block concerning this invention. It is a perspective view which shows the modification of the key brick installed in the groove | channel formed in the blast furnace tuyere block concerning this invention. It is a front view of the conventional blast furnace tuyere block.

Embodiments according to the present invention will be described below with reference to the drawings.
1 to 3 are explanatory views of the first embodiment, FIG. 1 is a perspective view of a blast furnace tuyere block, and FIG. 2 is a side view when the structure of the blast furnace tuyere block shown in FIG. 1 is manufactured. FIG. 3 is a cross-sectional view of a portion taken along line AA of FIG.
4 and 5 are explanatory views of the second embodiment. FIG. 4 is a perspective view of the blast furnace tuyere block. FIG. 5 is a diagram illustrating a state in which the structure of the blast furnace tuyere block shown in FIG. It is a perspective view shown.
6 and 7 are explanatory views of the third embodiment. FIG. 6 is a perspective view of the blast furnace tuyere block. FIG. 7 is a diagram illustrating a state in which the structure of the blast furnace tuyere block shown in FIG. It is a perspective view shown.
FIGS. 8 and 9 are explanatory views of the fourth embodiment. FIG. 8 is a perspective view of the blast furnace tuyere block. FIG. 9 is a diagram illustrating a state in which the blast furnace tuyere block structure shown in FIG. It is a perspective view shown.
10 to 12 are explanatory views of the fifth embodiment, FIG. 10 is a perspective view of a blast furnace tuyere block, and FIG. 11 is a state in which the blast furnace tuyere block structure shown in FIG. FIG. 12 is a sectional view of a portion taken along the line CC of FIG.
FIGS. 13-15 is a perspective view which shows the modification of the key brick installed in the groove | channel formed in the blast furnace tuyere block concerning this invention.

Hereinafter, a first embodiment of the present invention will be described in detail with reference to FIGS.
In the first embodiment, as shown in FIG. 1, the blast furnace tuyere block 1 is configured such that a tuyere 5 for supplying high-temperature air into the blast furnace penetrates. Further, the tuyere 5 is constituted by a tuyere hardware 3, and is formed of a refractory material composed of an upper block 1a and a lower block 1b that are divided into upper and lower parts so as to accommodate and hold the tuyere hardware 3. ing.

  The tuyere metal 3 constituting the tuyere 5 can be formed of, for example, a copper member and may have a cylindrical shape, but generally, the front wall 2 side which is the inside of the furnace has a small diameter. Can be configured as a truncated conical cylinder (shown as a cylindrical shape in FIG. 3).

  Further, as shown in the figure, the blast furnace tuyere block 1 has a structure in which the upper block 1a and the lower block 1b surround the tuyere metal 3 over the entire circumference, and the right and left end portions of the horizontal joint 4 constitute half of the groove 7. A recess is formed.

As shown in FIG. 2, the blast furnace tuyere block 1 of the present embodiment has a wall surface (see FIG. 2) that forms the vertical joint 8 and the horizontal joint 4 as shown in FIG. In FIG. 1, a key brick 91 as a key member is installed in the groove 7 at the intersecting portion of the side wall 6 where the groove 7 is formed.
As described above, when the key bricks 91 are installed at the intersections constituting the vertical joints 8 and the horizontal joints 4, the vertical and horizontal movements between the blocks are restricted by the key bricks 91.

  Moreover, in the blast furnace tuyere block 1 in this embodiment, the groove 7 is the surface (front wall 2 side) of the vertical joint 8 and the horizontal joint 4 (see FIG. 2) when the blast furnace tuyere blocks 1 are arranged side by side. It is configured to be exposed. That is, the groove 7 is formed over the entire length of the side wall 6 in the front-rear direction.

  The groove 7 may be configured so that the groove 7 is exposed to the joint even if the length of the groove 7 does not extend over the entire side wall 6 (the entire longitudinal joint between the tuyere blocks). In this configuration, the groove 7 is opened in either the front wall 2 or the rear side wall (opposite the front wall), and when installing the key brick 91 in the groove 7, the blast furnace tuyere blocks 1 are arranged side by side. It can be inserted later.

  In addition, when the groove | channel 7 is formed over the full length of the side wall 6 like this embodiment, when installing the key brick 91 in this groove | channel 7, even after arranging a tuyere block, block front and back The form which inserts from any direction of these can be employ | adopted, and the coupling | bonding force between blocks and the workability of a block are very excellent.

A second embodiment according to the present invention will be described below with reference to FIGS.
The blast furnace tuyere block 21 according to the present embodiment includes an upper block 21a, a middle block 21b, and a lower block 21c that are divided into three in the vertical direction. Along each of the four, four are formed.
Further, the groove 27 is formed so as to be positioned at the end of the horizontal joint 4, and the key brick 93 can be disposed at the intersection of the vertical joint 8 and the horizontal joint 4.
Therefore, the combined structure between the blast furnace tuyere blocks 21 can be strengthened.
Also in this embodiment, since the groove 27 is formed over the entire length in the front-rear direction of the block side wall 26, the effect that the coupling force between the blocks and the workability of the block are excellent is obtained as in the first embodiment. I can do it.

A third embodiment according to the present invention will be described below with reference to FIGS.
In the blast furnace tuyere block 31 according to the present embodiment, a large groove 37 is formed on the block side wall 36 constituting the vertical joint 8. The blast furnace tuyere block 31 includes an upper block 31 a, a middle block 31 b, and a lower block 31 c that are divided into three in the vertical direction, and two horizontal joints 4 are positioned in the groove 37.
In this groove 37, the key brick 94 is arranged so as to span between a plurality of horizontal joints 4 that are spaced apart and substantially parallel to each other.

  In this way, by providing the key brick 94 so as to span between the two horizontal joints 4, it is possible to achieve the effect of preventing the shift of the plurality of joint parts by one key member, and the key bricks 94 are constructed side by side. The combined structure between the blast furnace tuyere blocks 31 can be strengthened.

  In the present embodiment, since the groove 37 is formed over the entire width of the block side wall 36 in the front-rear direction, the key brick 94 can be installed after arranging the blast furnace tuyere blocks 36 in the same manner as in the first embodiment described above. It is possible to obtain an effect that the bonding force between the blocks and the workability of the blocks are excellent.

Hereinafter, the fourth embodiment according to the present invention will be described in detail with reference to FIGS. 8 and 9.
In 4th Embodiment, it is formed with the refractory material which consists of the upper block 51a and the lower block 51b divided into two up and down so that the tuyere metal 3 may be accommodated and held.
Further, as shown in the figure, the blast furnace tuyere block 51 has a structure in which the tuyere metal 3 is surrounded by the upper block 51a and the lower block 51b over the entire periphery, and grooves 57 are formed at the left and right ends of the horizontal joint 4. A recess is formed, and the lower block 51b is provided with a groove 57.

The blast furnace tuyere block 51 of the present embodiment has a key brick 96 and a vertical joint at the intersection of the wall surfaces constituting the vertical joint 8 and the horizontal joint 4 when manufacturing a structure in which a plurality of the blast furnace tuyere blocks 51 are arranged. Another key brick 96 provided only at 8 can be installed.
As described above, when the key brick 96 is installed at the intersecting portion constituting the vertical joint 8 and the horizontal joint 4, the key brick 96 restricts the movement in the vertical and horizontal directions between the blocks, and the other lower side The key brick 96 can also provide a slip prevention function.

  Further, since the installation position of the lower key brick 96 is ½ or less below the total height of the blast furnace tuyere block 51, the key member due to the severe use condition of the blast furnace for a long time is used in the lower key brick 96. Damage can be delayed, and the function of the key brick 96 can be maintained for a long time.

A fifth embodiment according to the present invention will be described below with reference to FIGS.
The blast furnace tuyere block 71 according to the present embodiment has upper and lower blocks 71 a and 71 b, a groove 77 is formed along the block vertical direction of the block side wall 46 constituting the vertical joint 8, and the groove 78 is a horizontal joint 4. It is provided at a location corresponding to. The horizontal joint 78 is open to the rear side of the block.
Thus, by providing the groove 77 along the vertical direction and the groove 78 along the horizontal direction, the key brick 98 and the key brick 99 can be provided, and thereby the combined structure between the blast furnace tuyere blocks 71 is extremely strong. Can be.

  In the present embodiment, since the groove 77 is formed over the entire height of the block side wall 76 in the vertical direction and opens to the block upper surface wall 79a and the lower surface wall 79b, the blast furnace tuyere block 77 as in the first embodiment described above. It is possible to obtain an effect such that the key bricks 98 can be installed after arranging them. The key brick 99 is exposed on the rear wall of the block, but the key brick is not exposed on the block front wall 72 side (furnace inside), so that damage to the vertical and horizontal joints can be suppressed.

Hereinafter, the modification of the key brick formed in the blast furnace tuyere block concerning the present invention is explained.
The key brick adapted to each of the above embodiments employs a rectangular parallelepiped shape. However, the present invention is not limited to the above embodiment, and for example, shapes shown in FIGS. 13 to 15 can be employed.
FIG. 13 shows a cylindrical key brick 81.
Although not shown, the groove for receiving the key brick 81 is a semi-cylindrical groove.
FIG. 14 shows a key brick 82 having a rhombic cross section.
Although not shown, the groove for receiving the key brick 82 has a triangular cross section.
FIG. 15 shows a spherical key brick 83.
Although not shown, the groove for receiving the key brick 83 is a hemispherical groove.
Further, the shape of the key brick can be appropriately selected according to the shape and size of the blast furnace tuyere block such as an elliptical column shape or a polygonal column shape.

Hereinafter, the construction method of a blast furnace tuyere block shape according to the present invention will be described with reference to the first embodiment shown in FIGS.
First, as one structure for manufacturing a blast furnace, a tuyere structure for supplying high-temperature air into the blast furnace is created. At this time, for example, this structure is manufactured by arranging many tuyere in a circular shape.

  At this time, when assembling a plurality of blast furnace tuyere blocks 1 in which the tuyere metal fittings 3 are accommodated and held in advance, the grooves 7 provided on the side walls constituting the vertical joint 8 between the blast furnace tuyere blocks 1 face each other. In addition to installing the key bricks 91 between the grooves 7, a vertical joint material is provided and connected horizontally (only two are shown in FIG. 2).

  Thus, since the key brick 91 is installed in the vertical joint 8 and the horizontal joint 4 between the blast furnace tuyere blocks 1, the coupling strength between blast furnace tuyere blocks increases, and structural stability with respect to a shift | offset | difference etc. is strengthened.

  The present invention is not limited to the above embodiment, and various modifications can be made. For example, the number of grooves, the direction and shape of the grooves, or the number of key bricks per joint may be provided in the joint block height direction or the joint block front-rear direction. Further, when a plurality of key bricks are provided in the height direction of the joint, it is preferable that the key bricks function effectively for a long period of time when the center of at least one of the key bricks is ½ or less below the total height of the blast furnace tuyere block. A position of 15 to 35% of the total height of the blast furnace tuyere block from the block lower wall surface is more preferable because the key brick functions more effectively. This is because the damage of the blast furnace tuyere block 1 proceeds from the upper part, so the key brick 90 is preferably located at the lower part, and the strength of the blast furnace tuyere block 1 is hindered at 15% or less of the total height of the blast furnace tuyere block. Because.

  In the present invention, since the key member is installed on the side wall constituting the joint when arranging a plurality of blast furnace tuyere blocks, when the blast furnace tuyere block is combined, the key member is used to prevent the block from being displaced by the key member. As a result, the bonding force can be strengthened, and the long-term structural stability of the structure of the blast furnace tuyeres block can be enhanced, so that the expected performance can be maintained for a long time, and the industrial applicability is extremely large.

1, 21, 31, 51, 71 Blast furnace tuyere block 2, 32, 52, 62, 72 Block front wall 3 Tuyere hardware 4 Horizontal joint 5 Tuyere 6, 26, 36, 46, 76 Block side wall 7, 27 , 37, 57, 77, 78 Groove 8 Vertical joint 9a, 29a, 39a, 79a Block top wall 9b, 29b, 39b, 79b Block bottom wall 81, 82, 83, 91, 93, 94, 96, 98, 99 Key brick (Key material)

Claims (6)

A structure of a blast furnace tuyere block in which a plurality of blast furnace tuyere blocks configured to penetrate the tuyere supplying high temperature air into the blast furnace are arranged,
The blast furnace tuyere block is divided into a plurality of blocks in the vertical direction, has horizontal joints between the blocks, and has a structure surrounding the tuyere hardware constituting the inner wall of the tuyere with the plurality of blocks over the entire circumference. ,
At least one key member that bites into both side walls is installed on the side wall that forms the joint between the blast furnace tuyere blocks ,
The key member is installed substantially parallel to the central axis of the tuyere, and the installation position is such that the center of at least one key member is 15 from the lower wall surface of the blast furnace tuyere block to the total height of the blast furnace tuyere block. A structure of a blast furnace tuyere block which is configured to be at a position of ˜35% . The structure of a blast furnace tuyere block according to claim 1, wherein the key member is installed at an intersection between the horizontal joint and the joint between the blast furnace tuyere block. 15 to 35% of the total height of the blast furnace tuyere block from the lower wall surface of the blast furnace tuyere block on the wall surface of the lowermost block of the plurality of blocks, substantially parallel to the central axis of the tuyere The structure of the blast furnace tuyere block according to claim 1 or 2, wherein the key member that is the installation position is installed. The said key member is installed so that it may be exposed to the joint surface between the said blast furnace tuyere blocks, The structure of the blast furnace tuyere block in any one of Claims 1-3 characterized by the above-mentioned. The said key member is provided over the full length of the joint between the said blast furnace tuyere blocks, The structure of the blast furnace tuyere block in any one of Claims 1-4 characterized by the above-mentioned. The structure of the blast furnace tuyere block according to any one of claims 1 to 3, wherein the key member is installed so as not to be exposed on a joint surface between the blast furnace tuyere blocks.

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