CN112877486A

CN112877486A - Copper steel composite cooling wall

Info

Publication number: CN112877486A
Application number: CN202110331859.0A
Authority: CN
Inventors: 刘子渲; 刘志宏; 罗凯; 夏陟
Original assignee: Beris Engineering and Research Corp
Current assignee: Beris Engineering and Research Corp
Priority date: 2021-03-29
Filing date: 2021-03-29
Publication date: 2021-06-01

Abstract

The invention belongs to the technical field of blast furnace body cooling, and discloses a copper-steel composite cooling wall capable of improving the overall structural strength and the service life of the cooling wall. The copper-steel composite cooling wall comprises: the cooling structure comprises a first cooling wall made of copper, a second cooling wall made of steel and a connecting structure fixedly connecting the first cooling wall and the second cooling wall, wherein a plurality of cooling channels which are arranged at intervals and in parallel are formed in the first cooling wall along the vertical direction, the first wall surface of the first cooling wall facing the interior of the blast furnace is formed into a hot surface, and the second wall surface of the other side is attached to the third wall surface of the second cooling wall; the third wall surface of the second cooling wall is attached to the second wall surface, and the fourth wall surface of the second cooling wall, which is used for being connected and fixed with the blast furnace, forms a cold surface; the connection structure includes: a groove structure formed on the second wall surface in the vertical direction between the adjacent cooling channels; and the shape of the groove structure is matched with the shape of the groove structure, and the groove structure and the shape of the groove structure form a plug-in matching convex strip structure.

Description

Copper steel composite cooling wall

Technical Field

The invention belongs to the technical field of iron-making blast furnace body cooling equipment, and particularly relates to a copper-steel composite cooling wall.

Background

In current global steel production, blast furnaces are an important equipment for iron making, including: a furnace wall made of steel plate; the interior perisporium of oven is gone up the laminating and is fixed with blast furnace cooling apparatus, and blast furnace cooling apparatus is established by a plurality of staves and is established and form, and its theory of operation is: the heat transferred from the blast furnace is smoothly led out by flowing cooling medium in the cooling wall, and the high-temperature heat flow is prevented from directly reaching the furnace wall. The stave plays a crucial role as a heat transfer device of the blast furnace for the service life of the blast furnace.

Because of the excellent heat-conducting property of the metal copper, the copper cooling wall is used as a novel blast furnace cooling device, the situation that the cooling wall is melted and burnt due to overhigh temperature in a blast furnace kiln can be effectively reduced, and the copper cooling wall is widely applied to areas needing strong cooling, such as the lower part of a blast furnace body, the furnace waist, the furnace belly and the like in modern domestic and foreign blast furnaces. However, in practical use, the copper cooling wall has the defect of low metal strength, namely the overall strength of the copper cooling wall made of copper is much lower than that of the cast iron cooling wall and the cast steel cooling wall, and particularly, the position of a hole formed in the copper cooling wall and used for being fixed with the wall of the blast furnace is a performance weak point which is easy to deform under stress; and other positions of the copper cooling wall can also accumulate deformation in long-term use, so that the service life of the copper cooling wall is influenced.

Disclosure of Invention

In order to improve the overall structural strength and the service life of the cooling wall, the invention provides a copper-steel composite cooling wall.

The copper-steel composite cooling wall comprises the following components: the cooling structure comprises a first cooling wall, a second cooling wall and a connecting structure, wherein a plurality of cooling channels are formed in the first cooling wall along the vertical direction, the cooling channels are arranged at intervals in parallel, the first cooling wall comprises a first wall surface facing the interior of the blast furnace and a second wall surface opposite to the first wall surface, and the first wall surface is formed into a hot surface of the copper-steel composite cooling wall; the second cooling wall is attached to the second wall surface and comprises a third wall surface attached to the second wall surface and a fourth wall surface opposite to the third wall surface, the fourth wall surface is used for being connected with the furnace wall of the blast furnace, and a cold surface connecting structure of the copper-steel composite cooling wall is formed and used for connecting and fixing the first cooling wall and the second cooling wall; the material of first stave is copper, and the material of second stave is steel, and connection structure includes: a groove structure formed on the second wall surface in the vertical direction, the groove structure being located between adjacent cooling channels; and the convex strip structure is formed on the third wall surface along the vertical direction, and the shape of the convex strip structure is matched with the groove structure and is used for forming inserting fit with the groove structure.

Further, be formed with a plurality of groove structure along vertical direction interval and parallel on the second wall, be formed with a plurality ofly on the third wall along vertical direction interval and parallel and all form the sand grip structure of grafting complex with each groove structure, wherein, each groove structure is located respectively between the adjacent cooling channel.

Further, the groove structure comprises a first side face and a second side face which are parallel and opposite to each other along the length direction of the first cooling wall, and the distances between the first side face and the cooling channel, the distances between the second side face and the cooling channel and the distances between the second side face and the cooling channel are respectively greater than or equal to 30 mm.

Furthermore, a plurality of counter bores are formed in the first cooling wall, a plurality of through holes with the same radial size as the counter bores are formed in the second cooling wall, the counter bores and the through holes jointly form connecting holes used for inserting external fixing parts to connect the first cooling wall and the second cooling wall, circular grooves coaxial with the counter bores are formed in the second wall, annular protrusions matched with the circular grooves are formed in the positions, corresponding to the counter bores, of the third wall, and the annular protrusions are used for being in plug-in fit with the circular grooves.

Further, the first cooling wall and the second cooling wall are both configured as plate-shaped bodies, the groove structures and the circular grooves are formed on the plate-shaped bodies of the first cooling wall, and the bead structures and the annular protrusions are integrally formed on the plate-shaped bodies of the second cooling wall, wherein the ratio of the thickness of the plate-shaped bodies of the second cooling wall to the thickness of the plate-shaped bodies of the first cooling wall ranges from 1:2 to 2: 1.

Further, the outer dimension of the plate-like body of the second stave is the same as the outer dimension of the plate-like body of the first stave.

Furthermore, the second cooling wall also comprises a cladding vertical wall vertically connected with the peripheral edge of the plate-shaped body of the second cooling wall, the plate-shaped body of the second cooling wall and the cladding vertical wall jointly form a cladding cavity, and the first cooling wall is attached to and arranged in the cladding cavity.

Further, the first cooling wall and the second cooling wall are fixedly connected through a composite process.

Furthermore, a plurality of brick-inlaid grooves used for connecting with refractory materials are formed on the first wall surface.

Furthermore, a plurality of brick inlaying grooves are arranged at intervals along the height direction of the first cooling wall, and the brick inlaying grooves are arranged into one or more of dovetail grooves, straight grooves, labyrinth grooves, mortise and tenon grooves and concave and convex grooves.

Compared with the prior art, the copper-steel composite cooling wall of the invention comprises the following components:

1) the first cooling wall opposite to the interior of the blast furnace is arranged and is made of copper materials with good heat conductivity, so that the situation that the cooling wall is melted and burnt due to overhigh temperature in the blast furnace can be effectively reduced; the second cooling wall attached to the first cooling wall is made of an iron material with higher metal strength, so that the first cooling wall with the softer metal strength can be reinforced, the copper-steel cooling wall has good heat-conducting property and higher metal strength on the premise of not increasing or even reducing the thickness of the first cooling wall, the service life of the copper-steel cooling wall is prolonged, and the copper-steel cooling wall has higher economy;

2) the connecting structure comprises a groove structure formed on the first cooling wall and a convex strip structure formed on the second cooling wall and matched with the groove structure in an inserted manner, so that on one hand, the contact area for connection between the first cooling wall and the second cooling wall can be increased, and the connection strength of the first cooling wall and the second cooling wall is improved; on the other hand, the first cooling wall and the second cooling wall are connected more stably by inserting the groove structures and the protruding strip structures to form a shape matching mode.

Drawings

FIG. 1 is a front view of a copper-steel composite stave according to a first embodiment of the present invention;

FIG. 2 is a side view of the copper steel composite stave shown in FIG. 1;

FIG. 3 is a cross-sectional view taken along line A-A of the copper-steel composite stave shown in FIG. 1;

FIG. 4 is a sectional view taken along line B-B of the copper-steel composite stave shown in FIG. 1;

FIG. 5 is an enlarged view of the copper-steel composite stave shown in FIG. 4 at D;

FIG. 6 is a cross-sectional view at C-C of the copper-steel composite stave shown in FIG. 1;

FIG. 7 is a rear view of a copper steel composite stave according to a second embodiment of the present invention with cooling channels not shown;

FIG. 8 is a side view of the copper steel composite stave shown in FIG. 7 with the cooling channels not shown.

Detailed Description

For better understanding of the purpose, structure and function of the present invention, the copper-steel composite stave of the present invention will be described in further detail with reference to the accompanying drawings.

Fig. 1 to 8 show the structure of a copper-steel composite stave 100 according to an embodiment of the present invention, in which fig. 1 to 6 show the structure of a copper-steel composite stave 10 according to a first embodiment of the present invention, and fig. 7 to 8 show the structure of a copper-steel composite stave 100 according to a second embodiment of the present invention. As shown in fig. 1 to 8, a copper-steel composite stave 100 according to an embodiment of the present invention includes: the cooling structure comprises a first cooling wall 1, a second cooling wall 2 and a connecting structure 3 (shown in figure 3), wherein a plurality of cooling channels 13 (shown in figure 3) are formed in the first cooling wall 1 along the vertical direction H, the cooling channels 13 are arranged at intervals and in parallel, the first cooling wall 1 comprises a first wall surface 11 facing the interior of the blast furnace and a second wall surface 12 opposite to the first wall surface 11, and the first wall surface 11 is formed as a hot surface of a copper-steel composite cooling wall 100; the second cooling wall 2 is attached to the second wall surface 12, the second cooling wall 2 includes a third wall surface 23 attached to the second wall surface 12 and a fourth wall surface 24 opposite to the third wall surface 23, the fourth wall surface 24 is used for connecting with the furnace wall of the blast furnace and is formed as a cold surface of the copper-steel composite cooling wall 100; the connecting structure 3 is used for connecting and fixing the first cooling wall and the second cooling wall 2; wherein, the material of first stave 1 is copper, and the material of second stave 2 is steel, and connection structure 3 includes: groove structures 31 formed on the second wall surface 12 in the vertical direction H, the groove structures 31 being located between adjacent cooling channels 13; and a rib structure 32 formed on the third wall 23 along the vertical direction H, wherein the rib structure 32 is adapted to the groove structure 31 in shape and is used for forming a plug-in fit with the groove structure 31.

The "cooling channel 13" mentioned in the embodiment of the present invention refers to a channel for circulating a cooling medium, which is disposed inside the first cooling wall 1, and with reference to fig. 2 and fig. 3, the cooling channel 13 may include a main channel 131, a water inlet pipe 132, and a water outlet pipe 133, where the main channel 131 is disposed inside the first cooling wall 1 along the vertical direction H, one end of the water inlet pipe 132 and one end of the water outlet pipe 133 are respectively communicated with two ends of the main channel 131, and the other end of the water inlet pipe 132 and the other end of the water outlet pipe 133 both penetrate through the cold surface of the second cooling wall 2, and a cooling medium, such as water, may enter from the water inlet pipe 132 and sequentially flow out through the main channel 131 and the water outlet pipe 133, and during the flowing process of the cooling medium, the cooling medium cools the first cooling wall 1 and the second cooling.

When the copper-steel composite cooling wall 100 of the embodiment of the invention is used, the first cooling wall 1 and the second cooling wall 2 are in plug fit through the connecting structure 3 to connect the two, and the water inlet pipeline 132 and the water outlet pipeline 133 which penetrate out of the cold surface can be fixedly connected with the wall of the blast furnace in a sealing way through the corrugated expansion joint or the sealing cover, wherein the hot surface of the first cooling wall 1 is opposite to the inside of the blast furnace, and a high-temperature environment is generated when the processes such as iron making and the like are carried out in the blast furnace, so that the temperature of the copper-steel composite cooling wall 100 is increased. The copper-steel composite stave 100 can be cooled by injecting a cooling medium such as water into the cooling passage 13. The first stave 1 and the second stave 2 described herein may be connected by a composite process (described in detail below) in addition to the connection structure 3.

The copper-steel composite cooling wall 100 of the embodiment of the invention is provided with the first cooling wall 1 opposite to the interior of the blast furnace, and the first cooling wall 1 is made of copper material with good heat conductivity, so that the situation that the cooling wall is melted and burnt due to overhigh temperature in the blast furnace can be effectively reduced; the second cooling wall 2 attached to the first cooling wall 1 is made of an iron material with higher metal strength, so that the first cooling wall 1 with the softer metal strength can be reinforced, the copper-steel cooling wall 100 has good heat-conducting property and higher metal strength on the premise of not increasing or even reducing the thickness of the first cooling wall 1, the service life of the copper-steel cooling wall is prolonged, and the copper-steel cooling wall has higher economy; the connecting structure 3 comprises the groove structure 31 formed on the first cooling wall 1 and the convex strip structure 32 formed on the second cooling wall 2 and matched with the groove structure 31 in an inserted manner, so that on one hand, the contact area of the first cooling wall 1 and the second cooling wall 2 for connection can be increased, and the connection strength of the first cooling wall 1 and the second cooling wall 2 can be improved; on the other hand, the insertion between the groove structures 31 and the protruding structures 32 to form a shape fit can make the connection between the first cooling wall 1 and the second cooling wall 2 more stable.

Referring to fig. 1 and 3, according to the copper-steel cooling wall 100 of the embodiment of the invention, a plurality of groove structures 31 may be formed on the second wall surface 12 at intervals in the vertical direction H and in parallel, and a plurality of protruding strip structures 32 forming an insertion fit with the groove structures 31 may be formed on the third wall surface 23 at intervals in the vertical direction H and in parallel, wherein each groove structure 31 may be respectively located between adjacent cooling channels 13.

Since the cooling passage 13 is provided as a passage extending through the interior of the first stave 1 and the main passage 131 is formed by removing material, the cooling passage 13 of the first stave 1 is located at a weak point of the structural strength of the first stave 1. Through the arrangement, the convex strip structures 32 spliced with the groove structures 31 are correspondingly arranged between the adjacent cooling channels 13, the groove structures 31 and the convex strip structures 32 located in the corresponding groove structures 31 are respectively formed on two sides of the same cooling channel 13, the convex strip structures 32 reinforce the structures on two sides of the cooling channel 13, and the influence of the cooling channel 13 on the strength weakening of the first cooling wall 1 is reduced.

As shown in fig. 3, the groove structure 31 may include a first side 311 and a second side 312 parallel and opposite to each other along the length direction L of the first stave 1, and distances a and b between the first side 311 and the second side 312 and the cooling channel 13 are respectively greater than or equal to 30 mm.

The reason why the cooling channel 13 weakens the strength of the first cooling wall 1 has been described above, and is not repeated herein, and by the above arrangement, a certain distance a and a certain distance b can be maintained between the first side wall 311 and the second side wall 312 of the groove structure 31 and the cooling channel 13 (the main channel 131), respectively, and the distances a and b can substantially ensure that the first cooling wall 1 at the edge of the position where the cooling channel 13 is located is formed into a solid structure with a certain thickness, so that the structural strength of the first cooling wall 1 meets the use requirement, and further, the first cooling wall 1 can have a longer service life.

As shown in fig. 4 and 5, the first cooling wall 1 may further have a plurality of counter bores 14, the second cooling wall 2 may further have a plurality of through holes 232 having the same radial dimension as the counter bores 14, the counter bores 14 and the through holes 232 together form a connecting hole for inserting an external fixing component to connect the first cooling wall 1 and the second cooling wall 2, wherein the second wall surface 12 may have a circular groove 121 coaxial with the counter bores 14, the third wall surface 23 may have an annular protrusion 231 corresponding to the counter bores 14, and the annular protrusion 231 is used to form an insertion fit with the circular groove 121.

The "external fixing member" mentioned in the embodiment of the present invention may be provided as a bolt or the like. The copper-steel composite cooling wall 100 of the embodiment of the invention can be connected and fixed with the first cooling wall 1 and the second cooling wall 2 through the connecting structure 3 and the composite process, and at this time, a counter bore 14, a circular groove 121, an annular bulge 231 and a through hole 232 are not needed to be arranged; the copper-steel composite stave 100 of the embodiment of the present invention can also connect and fix the first stave 1 and the second stave 2 by the connection structure 3, the composite process, and the external fixing means, in which case: 1) the above-mentioned counter bore 14, circular groove 121, annular protrusion 231 and through hole 232 may be provided; alternatively, 2) only the counterbore 14 and the through-hole 232 may be provided to form a connection hole for penetrating the external fixing member.

The "counterbore 14" mentioned in the embodiment of the present invention may be provided at various portions of the first stave 1 without interfering with the cooling passage 13.

The connecting holes provided in the embodiment of the invention can allow external fixing parts to penetrate to connect and fix the first cooling stave 1 and the second cooling stave 2, so that the connection between the first cooling stave 1 and the second cooling stave 2 is more stable. It should be noted that, because the metal strength of the copper material is low, the counterbore 14 of the first stave 1 is easy to deform during long-term use, and in the embodiment of the present invention, the circular groove 121 is provided on the first stave 1, and the annular protrusion 231 which is in plug-in fit with the circular groove 121 is provided on the third wall surface 23 of the second stave 2 opposite to the first stave 1, so that the annular protrusion 231 reinforces the edge of the counterbore 14 which is easy to deform, and the counterbore 14 is prevented from deforming during long-term use. It should be understood that the annular protrusion 231 is also made of a steel material.

According to the copper-steel composite stave 100 of the embodiment of the present invention, as shown in fig. 3, both the first stave 1 and the second stave 2 can be configured as plate-like bodies, the groove structures 31 and the circular grooves 121 are formed on the plate-like bodies of the first stave 1, and the bead structures 32 and the annular protrusions 231 are integrally formed on the plate-like bodies of the second stave 2, wherein a ratio of a thickness d of the plate-like bodies of the second stave 2 to a thickness c of the plate-like bodies of the first stave 1 ranges from 1:2 to 2: 1. The thickness c of the plate-shaped body of the first stave 1 is proportional to the thermal conductivity of the copper-steel composite stave 100, and the thickness d of the plate-shaped body of the second stave 2 is proportional to the structural strength of the copper-steel composite stave 100. Through the arrangement, the copper-steel composite cooling wall 100 has good heat-conducting performance and high structural strength.

Preferably, the ratio of the thickness d of the plate-like body of the second stave 2 to the thickness c of the plate-like body of the first stave 1 is 1: 1.

In the first embodiment as shown in fig. 1-6, the outer dimensions of the plate-like bodies of the second stave 2 are the same as the outer dimensions of the plate-like bodies of the first stave 1. Through the arrangement, the outer contours of the first cooling wall 1 and the second cooling wall 2 after being connected and fixed are consistent, the first cooling wall 1 can fully cool each position of the copper-steel composite cooling wall 100, and the second cooling wall 2 can fully reinforce each position of the first cooling wall 1.

In the second embodiment as shown in fig. 7 and 8, the second cooling wall 2 may further include a cladding standing wall 25 perpendicularly connected to a circumferential edge of the plate-shaped body of the second cooling wall 2, the plate-shaped body of the second cooling wall 2 and the cladding standing wall 25 together form a cladding cavity 251, and the first cooling wall 1 may be fittingly disposed in the cladding cavity 251. By forming the cladding standing wall 25 at the peripheral edge of the plate-like body of the second stave 2, the edge of the first stave 1 can be supported and reinforced by the cladding standing wall 25, avoiding the edge from being deformed after a long-term use of the first stave 1. It should be understood that the "cladding standing wall 25" is also made of steel material.

The second embodiment of the invention differs from the first embodiment in that the peripheral edge of the plate-like body of the second stave 2 of the second embodiment is formed with a cladding standup wall 25. The second embodiment may also be provided with the counter bore 14, the circular groove 121, the annular protrusion 231, and the through hole 232 described above. The second embodiment of the present invention is also provided with the same structure of the cooling passage as the first embodiment, except that the cooling passage is not shown in fig. 7, 8.

According to the copper-steel composite stave 100 of the embodiment of the invention, the first stave 1 and the second stave 2 can be fixedly connected through a composite process.

The term "composite process" as used in the embodiments of the present invention is to be understood as a process used for fixedly connecting two structures made of different materials. The 'composite process' can be specifically set as composite casting, special welding, rolling and the like.

As shown in fig. 2 and 7, the first wall 11 may be formed with a plurality of brick receiving grooves 111 for connection with refractory. By this arrangement, the refractory material can be disposed in the brick insertion groove 111 of the first wall surface 11, thereby preventing the hot surface of the first stave 1 from melting and improving the service life of the copper-steel composite stave 100.

Preferably, a plurality of the brick insertion grooves 111 may be provided at intervals in a height direction (which coincides with the vertical direction H) of the first stave 1, and the brick insertion grooves 111 may be provided as one or more of a dovetail groove, a straight groove, a labyrinth groove, a mortise and tenon groove, and a tongue and groove. Through the arrangement, the connection between the brick inserting groove 111 and the refractory material is more stable.

As shown in fig. 1, the copper-steel composite stave 100 according to the embodiment of the present invention (including the first and second embodiments) may further include a thermocouple hole 41 for inserting a thermocouple to measure the temperature of the copper-steel composite stave 100, and a positioning pin hole 43 for positioning the copper-steel composite stave 100. The first cooling wall 1 and the second cooling wall 2 of the embodiment of the invention can be both configured as a flat plate structure as shown in fig. 3, and can also be configured as an arc-shaped plate structure. The cross-sectional shape of the "cooling channel 13" of the embodiment of the present invention may be provided as one or more of a circular hole, a square hole, or an elliptical hole.

Preferably, the cooling passage 13 may be provided as a composite hole as shown in fig. 3, i.e., a hole formed by partially overlapping a plurality of circular holes, square holes, or elliptical holes.

The "copper material" mentioned in the embodiments of the present invention should be understood as a material containing metallic copper, and may be provided as pure copper, copper alloy, or the like; by "ferrous material" is understood a material comprising metallic iron, which may be provided as cast iron, cast steel, etc.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. It is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.

Claims

1. A copper-steel composite cooling wall is characterized by comprising:

the first cooling wall is internally provided with a plurality of cooling channels along the vertical direction, the cooling channels are arranged at intervals in parallel, the first cooling wall comprises a first wall surface facing the interior of the blast furnace and a second wall surface opposite to the first wall surface, and the first wall surface is formed into a hot surface of the copper-steel composite cooling wall;

a second stave which is attached to the second wall surface, the second stave including a third wall surface to which the second wall surface is attached and a fourth wall surface opposite to the third wall surface, the fourth wall surface being used for connection with a furnace wall of the blast furnace and forming a cold surface of the copper-steel composite stave; and

the connecting structure is used for connecting and fixing the first cooling wall and the second cooling wall;

wherein, the material of first stave is copper, the material of second stave is steel, connection structure includes: a groove structure formed on the second wall surface in a vertical direction, the groove structure being located between the adjacent cooling passages; and form along vertical direction convex strip structure on the third wall, the shape of convex strip structure with groove structure looks adaptation, and be used for with groove structure forms the cooperation of pegging graft.

2. The copper-steel composite cooling wall according to claim 1, wherein a plurality of groove structures are formed on the second wall surface at intervals in the vertical direction in parallel, a plurality of protruding strip structures which are in plug-in fit with the groove structures are formed on the third wall surface at intervals in the vertical direction in parallel, and each groove structure is located between adjacent cooling channels.

3. The copper-steel composite cooling wall according to claim 2, wherein the groove structure comprises a first side surface and a second side surface which are parallel and opposite to each other along the length direction of the first cooling wall, and the distances between the first side surface and the cooling channel and the distances between the first side surface and the second side surface are all greater than or equal to 30 mm.

4. The copper-steel composite cooling wall according to any one of claims 1 to 3, wherein a plurality of counter bores are further formed in the first cooling wall, a plurality of through holes with the same radial size as the counter bores are further formed in the second cooling wall, the counter bores and the through holes together form connecting holes for inserting an external fixing component to connect the first cooling wall and the second cooling wall, a circular groove coaxial with the counter bores is formed in the second wall surface, an annular protrusion matched with the circular groove is formed in a position, corresponding to the counter bores, of the third wall surface, and the annular protrusion is used for being in plug-in fit with the circular groove.

5. The copper-steel composite stave according to claim 4, wherein each of the first stave and the second stave is configured of a plate-like body, the groove structure and the circular groove are formed on the plate-like body of the first stave, and the bead structure and the annular protrusion are integrally formed on the plate-like body of the second stave, wherein a ratio of a thickness of the plate-like body of the second stave to a thickness of the plate-like body of the first stave is in a range of 1:2 to 2: 1.

6. The copper-steel composite stave of claim 5 wherein the external dimensions of the plate-like bodies of the second stave are the same as the external dimensions of the plate-like bodies of the first stave.

7. The copper-steel composite cooling wall according to claim 5, wherein the second cooling wall further comprises a cladding standing wall vertically connected with a circumferential edge of the plate-shaped body of the second cooling wall, the plate-shaped body of the second cooling wall and the cladding standing wall together form a cladding cavity, and the first cooling wall is arranged in the cladding cavity in an attached mode.

8. The copper-steel composite stave of any one of claims 1 to 3 wherein the first stave and the second stave are fixedly connected by a composite process.

9. The copper-steel composite stave according to any one of claims 1 to 3, wherein said first wall surface is formed with a plurality of brickwork grooves for connection with refractory materials.

10. The copper-steel composite cooling wall according to claim 9, wherein a plurality of the brick-inlaid grooves are arranged at intervals along the height direction of the first cooling wall, and the brick-inlaid grooves are arranged as one or more of dovetail grooves, straight grooves, labyrinth grooves, mortise and tenon grooves and concave and convex grooves.