CN210596127U

CN210596127U - Brick inlaying structure of blast furnace cooling wall

Info

Publication number: CN210596127U
Application number: CN201921334178.4U
Authority: CN
Inventors: 赵运建; 邹忠平; 徐灿; 胡显波; 许俊; 余东龙; 郭隆; 李少强; 吴开基
Original assignee: CISDI Engineering Co Ltd; CISDI Technology Research Center Co Ltd
Current assignee: CISDI Engineering Co Ltd; CISDI Technology Research Center Co Ltd
Priority date: 2019-08-16
Filing date: 2019-08-16
Publication date: 2020-05-22
Anticipated expiration: 2029-08-16

Abstract

The utility model relates to a brick inlaying structure for a cooling wall of a blast furnace, belonging to the technical field of blast furnace smelting equipment. The cooling wall is fully distributed with dovetail grooves, and the inlaid brick is provided with dovetails matched with the dovetail grooves and is characterized by comprising a plurality of first inlaid bricks and second inlaid bricks which are inlaid on the cooling wall and are distributed at intervals; the first inlaid brick is a low heat-conducting material with excellent affinity with blast furnace slag, and the second inlaid brick is a high heat-conducting material. This brick structure is inlayed to blast furnace stave is through utilizing heterogeneous to inlay the interval arrangement combination of brick and inlaying the seam structure on the outer terminal surface of brick, avoids inlaying the brick and receives concentrated thermal stress, increases the area of adhering to of slag, increases the adhesive force of slag to improve the stability of inlaying the slag ability of hanging of brick and cinder, and then realize the long term strong protection to the stave, improve the life of stave.

Description

Brick inlaying structure of blast furnace cooling wall

Technical Field

The utility model belongs to the technical field of blast furnace smelting equipment, a brick structure is inlayed to blast furnace stave is related to.

Background

A blast furnace is a common smelting plant, in which a stave is an important cooling device of the blast furnace, and refractory bricks are inlaid on the stave. The cooling wall and inlay the relation of interdependence between the brick, the cooling wall will inlay the heat of brick and in time take away through cooling water, play the supporting role and provide the shell protection to inlaying the brick simultaneously, and inlay the brick and make the high temperature isolation in cooling wall and the stove, prevent that the cooling wall from directly exposing in high temperature environment, otherwise, in case inlay the brick and drop, the cooling wall is because of direct exposure is damaged rapidly in high temperature environment, will produce very serious consequence. The cooling wall is ensured to be intact, and the method has important significance for ensuring the normal operation and the service life of the blast furnace.

The slag adhering capacity of the inlaid bricks and the stability of slag crust are the core influence factors on the protection effect of the cooling wall. Long-term production practice shows that the lower part of the furnace body, the furnace waist and the furnace belly of the blast furnace belong to high-load areas and are easy to damage, and a non-overheating cooling system which is favorable for slag hanging under the smelting condition of the blast furnace is the best mode for solving the service life problems of the lower part of the furnace body, the furnace waist and the furnace belly. The existing brick inlaying structure is inlaid on the cooling wall in a flush manner by adopting the same material inlaying bricks, the slag hanging capacity of the inlaying bricks is limited, the stability of slag crust is difficult to guarantee, in addition, the inlaying bricks bear larger concentrated thermal stress, are easy to damage, break or even fall off, damage is caused to the protection of the cooling wall, and the service life of the cooling wall is shortened.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing a reduce to inlay the concentrated thermal stress that the brick receives, improve to inlay brick and hang sediment ability and slag crust stability, and then improve cooling wall life's blast furnace stave and inlay brick structure.

In order to achieve the above purpose, the utility model provides a following technical scheme:

a brick inlaying structure for a cooling wall of a blast furnace comprises the cooling wall and inlaid bricks, wherein dovetail grooves are fully distributed in the cooling wall, dovetail tenons matched with the dovetail grooves are formed in the inlaid bricks, and the inlaid bricks comprise a plurality of first inlaid bricks and second inlaid bricks which are inlaid in the cooling wall and are arranged at intervals; the first inlaid brick is a low heat-conducting material with excellent affinity with blast furnace slag, and the second inlaid brick is a high heat-conducting material.

Furthermore, after the dovetail joints of the first inlaid brick and the second inlaid brick are inlaid into the dovetail grooves in the cooling wall, a seam structure is formed on the outer end face of one end, deviating from the dovetail joints, of the dovetail joints.

Further, the slotted structure is formed by arranging a chamfer on the outer end face of one end of the first tile and/or the second tile, which faces away from the dovetail joint.

Further, the angle of the chamfer is 40-45 degrees.

Further, the slotted structure is formed by the fact that after the slotted structure is embedded into the cooling wall, the outer end faces of the first embedded brick and the second embedded brick, which are far away from one end of the dovetail joint, are not flush.

Further, the width of the first inlaid brick is smaller than that of the second inlaid brick, and the length of the first inlaid brick is larger than that of the second inlaid brick.

Further, the ratio of the width of the dovetail joint of the first inlaid brick and the second inlaid brick to the thickness of the corresponding first inlaid brick and the second inlaid brick is 50% -60%.

Furthermore, the first inlaid brick is made of high-alumina materials or SiC materials, and the second inlaid brick is made of graphite materials.

Further, the cooling wall is a cast iron cooling wall or a copper cooling wall.

The beneficial effects of the utility model reside in that:

the utility model provides a brick structure is inlayed to blast furnace stave, rational in infrastructure, reliable, through utilizing heterogeneous interval arrangement combination of inlaying the brick and inlaying the seam structure on the outer terminal surface of brick, avoid inlaying the brick and receive concentrated thermal stress, increase the area of adhering to of slag, increase the adhesive force of slag to improve the stability of inlaying the sediment ability of hanging of brick and cinder, and then realize the long term strong protection to the stave, improve the life of stave.

Drawings

In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention provides the following drawings for illustration:

FIG. 1 is a schematic structural view of a prior art brick-inlaid structure of a cooling wall of a blast furnace;

fig. 2 is a schematic structural view of a brick-inlaid structure of a blast furnace stave according to embodiment 1 of the present invention;

FIG. 3 is a schematic view of the first tile shown in FIG. 2;

FIG. 4 is a right side view of the first tile of FIG. 3;

FIG. 5 is a right side view of the blast furnace stave bricked construction of FIG. 2;

FIG. 6 is a schematic cross-sectional view B-B of the brickwork-embedded blast furnace stave shown in FIG. 5;

fig. 7 is a schematic structural view of a brick-inlaid structure of a cooling wall of a blast furnace according to embodiment 2 of the present invention;

fig. 8 is a schematic structural view of a blast furnace stave brick-inlaid structure according to embodiment 3 of the present invention.

Reference numerals: the cooling wall 1, the first embedded brick 2, the second embedded brick 3 and the existing embedded brick 4.

Detailed Description

The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

As shown in fig. 2, embodiment 1 of the present invention provides a brick-inlaid structure for a cooling stave of a blast furnace, which includes a cooling stave 1 and inlaid bricks, wherein dovetail grooves are distributed on the cooling stave 1, and dovetail tenons matched with the dovetail grooves are provided on the inlaid bricks, and the brick-inlaid structure is characterized in that the inlaid bricks include a plurality of first inlaid bricks 2 and second inlaid bricks 3 which are inlaid on the cooling stave and are arranged at intervals; the first insert tile 2 is a low thermal conductive material having excellent affinity with blast furnace slag, and the second insert tile 3 is a high thermal conductive material. The present embodiment is not limited to whether the stave 1 is a cast iron stave or a copper stave. In the embodiment, the first embedded brick 2 is made of high-alumina material or SiC material, and the low-heat-conductivity material has good affinity with blast furnace slag, so that slag can be attached easily and the adhesion effect of slag crust can be ensured; the second embedded brick 3 is made of graphite, and the high-heat-conductivity material can rapidly reduce the temperature of the slag, so that the slag is rapidly solidified on the outer end face of the second embedded brick 3 and forms a slag crust.

As shown in fig. 3, in this embodiment, a dovetail is provided in the middle of the left side of the first tile 2, the right side is the outer end surface of the first tile 2, the distance from the left side to the right side is the length of the first tile 2, the distance from the upper side to the lower side of the outer end surface is the width of the first tile 2, the maximum distance from the upper side to the lower side of the dovetail is the width of the dovetail, two symmetric chamfers are provided on the outer end surface of the first tile 2 along the width direction, and the chamfer angle is 45 °; as shown in fig. 4, the maximum distance between the two chamfered surfaces of the first tile 2 is the thickness of the first tile 2. In this embodiment, the difference between the second inlaid brick 3 and the first inlaid brick 2 lies in that, firstly, the material is different, and secondly, there is no chamfer on the outer end face of the second inlaid brick 3. It should be noted that in other embodiments, chamfers may be provided on the outer end faces of the second tiles 3 only, or on the outer end faces of the first and

second tiles

2 and 3 at the same time.

Alternatively, as shown in fig. 5, a row of first inlaid bricks 2 is arranged in parallel on the cooling stave 1 from top to bottom, and two rows of second inlaid bricks 3 are correspondingly arranged, and are alternately arranged in sequence, and after the dovetail joints of the first inlaid bricks 2 and the second inlaid bricks 3 are inlaid into the dovetail grooves on the cooling stave 1, the outer end surfaces thereof are flush, so that the first inlaid bricks 2 and the second inlaid bricks 3 are closely distributed on the cooling stave 1 according to the above arrangement rule. The first inlaid brick 2 and the second inlaid brick 3 are alternately arranged according to a plurality of schemes, the arrangement rule is only one scheme disclosed in the embodiment, and the arrangement rule can be changed according to actual needs and is set according to other feasible inlaid brick arrangement rules. The first embedded bricks 2 made of low heat conduction materials and the second embedded bricks 3 made of high heat conduction materials are regularly and alternately combined, so that the contact area between the molten slag and the outer end faces of the embedded bricks can be remarkably increased, the adhesion force of the molten slag is improved, and the long-term stable slag crust can be formed; in addition, the thermal stress borne by the inlaid brick is dispersed, the inlaid brick is prevented from being broken or falling off due to the over-concentrated thermal stress, and the service life of the inlaid brick is prolonged.

In the present embodiment, as shown in fig. 6, after the dovetails of the first and

second tiles

2 and 3 are fitted into the dovetail grooves of the stave 1, the outer end surfaces thereof are formed with a slit structure formed by chamfering the outer end surface of the first tile 2. This seamed structure is favorable to the slag to adhere to on first inlaying brick 2 and takes root, is favorable to the formation of cinder, is favorable to the firm combination of cinder and first inlaying brick 2, has improved the stability of hanging sediment ability and cinder of first inlaying brick 2, forms firm protection to stave 1.

In addition, in the present embodiment, the ratio of the width of the dovetail of the first and

second tiles

2 and 3 to the thickness of the respective first and

second tiles

2 and 3 is 50%. The expansion proportion of the sectional area of the inlaid brick at the dovetail joint is reduced, the thermal stress concentration is reduced, the occurrence of damage such as brick breakage and falling is slowed down or prevented, and the service life of the inlaid brick is further prolonged.

Example 2:

the utility model discloses a difference between embodiment 2 and embodiment 1 lies in, the length that first inlay brick 2 is greater than the length that the second inlayed brick 3, after the dovetail of first inlay brick 2 and second inlay brick 3 inlayed the dovetail recess on advancing stave 1, its terminal surface was not flushed, and the outer terminal surface of first inlay brick 2 is compared in the outer terminal surface formation convex step of second inlay brick 3, constitutes the seam structure, has increased the adhesion area of slag, is favorable to hanging the sediment.

Example 3:

the utility model discloses a difference between embodiment 3 and embodiment 2 lies in, does not have the chamfer on the outer terminal surface of first inlaying brick 2, and the width that brick 3 was inlayed to first width of inlaying brick 2 is less than the second, and the brick 3 is inlayed to the corresponding one-line second of arranging under the parallel one-line first inlaying brick 2 to arrange in turn in proper order. Compared with the embodiment 2, the distance between the convex steps of the first inlaid bricks 2 is shortened, the arrangement number of the first inlaid bricks 2 is increased under the condition that the cooling wall 1 is not changed, the attachment area of the slag is further increased, and the slag hanging capacity of the inlaid bricks is improved.

Finally, the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the scope of the claims of the present invention.

Claims

1. A brick inlaying structure for a cooling wall of a blast furnace comprises the cooling wall and inlaid bricks, wherein dovetail grooves are fully distributed in the cooling wall, and dovetail tenons matched with the dovetail grooves are arranged on the inlaid bricks; the first inlaid brick is a low heat-conducting material with excellent affinity with blast furnace slag, and the second inlaid brick is a high heat-conducting material.

2. The blast furnace stave brick setting of claim 1 wherein the dovetail of the first and second blocks is inserted into the dovetail groove of the stave such that a slot structure is formed on an outer face of an end thereof facing away from the dovetail.

3. The blast furnace stave brick construction of claim 2 wherein the slotted construction is formed by a chamfer provided on an outer face of the first and/or second brick facing away from an end of the dovetail.

4. The blast furnace stave brick-setting structure of claim 3 wherein the angle of the chamfer is 40 ° to 45 °.

5. The blast furnace stave brick construction of claim 2 wherein the slotted structure is formed by a first and second brick inserted into the stave such that the outer faces of the first and second bricks facing away from the dovetail are not flush.

6. The blast furnace stave tile construction of claim 5 wherein the first tile has a width less than a width of the second tile and wherein the first tile has a length greater than a length of the second tile.

7. The blast furnace stave tile structure of claim 1 wherein the ratio of the width of the dovetails of the first and second tiles to the thickness of the respective first and second tiles is between 50% and 60%.

8. The blast furnace stave insert brick structure of any one of claims 1 to 7 wherein the first insert brick is made of high alumina or SiC and the second insert brick is made of graphite.

9. The blast furnace stave brick construction of claim 1 wherein the stave is a cast iron stave or a copper stave.