Cooling wall for blast furnace

Abstract

The utility model relates to a cooling wall for a blast furnace, which comprises a heat exchange layer configured to export heat transferred by the blast furnace; the supporting layer is arranged on the side, away from the interior of the blast furnace, of the heat exchange layer and is configured to increase the strength of the heat exchange layer; the abrasion-resistant layer is arranged on the side, close to the interior of the blast furnace, of the heat exchange layer and is configured to reduce abrasion of the heat exchange layer, a plurality of dovetail grooves are formed in the side, close to the blast furnace, of the heat-resistant layer, the abrasion-resistant layer is divided into a plurality of areas arranged at intervals, and the abrasion-resistant layer is arranged on the groove tops of the dovetail grooves; and the plurality of steel bricks are arranged in one or more dovetail grooves. By adding the steel bricks to the cooling wall, the high temperature resistance / wear resistance of the cooling wall can be improved, the adhesive force of the cooling wall can be improved, the cooling wall can quickly condense slag crust, other materials can be fixed, and the cooling wall can be effectively protected.

Description

Technical Field

[0001] This utility model relates to the technical field of blast furnace cooling equipment, and in particular to a cooling wall for blast furnaces. Background Technology

[0002] However, blast furnaces typically use steel plates for the furnace shell, lined with refractory bricks inside to protect it. To reduce heat radiation from the high temperatures inside the furnace to the furnace shell, cooling walls are needed between the shell and the refractory brick lining to conduct heat. Because copper has high thermal conductivity, it is usually used to make the cooling walls to smoothly dissipate the heat transferred inside the blast furnace; however, copper has low mechanical strength and is easily worn and deformed by the environment inside the blast furnace.

[0003] Referring to Chinese patent document No. 202220090208.7, a cast copper cooling wall for cooling a large blast furnace hearth is disclosed, comprising four cooling wall bodies spliced ​​together. Two of the spliced ​​cooling wall bodies are provided with matching slots and inserts. Nickel-based high-temperature resistant alloys are welded into the slots and inserts respectively. Matching bolt fixing holes are provided in the slots and inserts respectively, and bolts are threaded into the bolt fixing holes.

[0004] In the above scheme, the cooling wall is in direct contact with the blast furnace interior, causing the side of the cooling wall closest to the blast furnace interior to be in a high-temperature environment for a long time, which easily leads to deformation and damage. Without structural optimization, it is difficult to effectively improve the service life of the cooling wall. In particular, when refractory bricks are directly laid on the cooling wall, the refractory bricks are prone to falling off. Utility Model Content

[0005] To address the technical problems existing in the prior art, this utility model proposes a cooling wall for a blast furnace, comprising: a heat exchange layer for dissipating heat transferred inside the blast furnace; the cooling wall further comprising: a support layer, a wear-resistant layer, multiple steel bricks, and multiple cavities, with the heat exchange layer having multiple dovetail grooves; wherein, the support layer is used to increase the strength of the heat exchange layer, the heat exchange layer is located between the support layer and the wear-resistant layer, the wear-resistant layer faces the inside of the blast furnace, and the wear-resistant layer is used to reduce wear on the heat exchange layer; multiple cavities are located between the heat exchange layer and the support layer for accommodating cooling water; multiple dovetail grooves are disposed near the heat exchange layer. On one side of the blast furnace, multiple dovetail grooves are arranged at intervals, dividing the wear-resistant layer into multiple spaced areas. The dovetail grooves are located between two adjacent wear-resistant layers, with the top of the groove close to the wear-resistant layer and the size of the top of the groove smaller than the bottom. Multiple steel bricks are disposed at one or more of the dovetail grooves. Each steel brick includes a brick body and multiple protrusions extending outward from the brick body. The protrusions are complementary in shape to the dovetail grooves, allowing the brick body to be installed at multiple dovetail grooves. The multiple steel bricks are arranged in rows and spaced apart at the dovetail grooves.

[0006] As described above, the cooling wall extends outward and adheres tightly to the wear-resistant layer.

[0007] As described above, the cooling wall further includes a connector located on the wear-resistant layer region between two adjacent dovetail grooves, the connector being used to connect the steel brick to the wear-resistant layer.

[0008] As described above, the wear-resistant layer of the cooling wall includes multiple slag hooks.

[0009] As described above, the cooling wall further comprises castable refractory on the plurality of steel bricks.

[0010] The cooling wall as described above, wherein the castable further comprises at least 10% metal steel fibers.

[0011] As described above, the cooling wall further includes a coating material on the plurality of steel bricks that completely covers the heat exchange layer.

[0012] As described above, in the cooling wall, the plurality of steel bricks are distributed throughout the heat exchange layer in a dispersed manner to prevent large-area detachment of refractory material or slag.

[0013] This application improves the cooling wall's high-temperature resistance and wear resistance by adding steel bricks, enhances its adhesion, facilitates rapid slag formation, and can also fix other materials, effectively protecting the cooling wall. Attached Figure Description

[0014] The preferred embodiments of this utility model will now be described in further detail with reference to the accompanying drawings, wherein:

[0015] Figure 1A and Figure 1B This is a schematic diagram of a cooling wall for a blast furnace according to an embodiment of this application;

[0016] Figure 2 An exploded view of a cooling wall for a blast furnace according to an embodiment of this application;

[0017] Figure 3 This is a cross-sectional view of a cooling wall for a blast furnace according to an embodiment of this application;

[0018] Figure 4 for Figure 3 Enlarged view of a portion of point A in the middle;

[0019] Figure 5 This is a schematic diagram of a cooling wall for a blast furnace according to an embodiment of this application;

[0020] Figure 6 for Figure 5Enlarged view of a section at point B in the middle;

[0021] Figure 7 This is a schematic diagram of a cooling wall according to an embodiment of this application;

[0022] Figure 8 This is a schematic diagram of a cooling wall according to another embodiment of this application;

[0023] Figure 9 A schematic diagram of a cooling wall according to another embodiment of this application; and

[0024] Figure 10 This is a schematic diagram of a steel brick according to an embodiment of this application. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0026] In the following detailed description, reference can be made to the accompanying drawings, which form part of this application and illustrate specific embodiments of the present application. In the drawings, similar reference numerals describe substantially similar components in different figures. Specific embodiments of the present application are described in sufficient detail below to enable those skilled in the art to implement the technical solutions of the present application. It should be understood that other embodiments may also be utilized, or structural, logical, or electrical changes may be made to the embodiments of the present application.

[0027] Cooling walls are one of the main pieces of equipment in blast furnaces. Currently, there are several types of cooling walls, including cast steel cooling walls, cast iron cooling walls, copper cooling walls, and composite cooling walls. Due to copper's high thermal conductivity, copper cooling walls are often used in the blast furnace belly, waist, and lower part of the furnace body. However, these areas have the most complex and harsh internal environment, making copper cooling walls prone to wear and deformation, leading to damage. Currently, a refractory lining is typically installed on the hot surface of the cooling wall to protect it. However, this refractory lining tends to detach after a period of use, failing to provide adequate protection.

[0028] This application proposes a novel cooling wall with a wear-resistant layer on the side of the cooling wall closest to the furnace interior. This effectively prevents wear and deformation of the cooling wall, improves its resistance to high furnace temperatures and corrosion, extends its service life, and provides effective protection for the blast furnace, thus contributing to its stable operation and production. Furthermore, by embedding the protrusions of the steel bricks into the dovetail grooves, the steel bricks are secured, effectively preventing them from falling off.

[0029] The technical solution of this application will be further illustrated below through specific implementation methods. Those skilled in the art should understand that the following description is merely for the convenience of understanding the technical solution of this application and should not be used to limit the scope of protection of this application.

[0030] Figure 1A and Figure 1B This is a schematic diagram of a cooling wall for a blast furnace according to one embodiment of the present application. Figure 2 This is an exploded view of a cooling wall for a blast furnace according to an embodiment of this application. Figure 3 This is a cross-sectional view of a cooling wall for a blast furnace according to an embodiment of this application. Figure 4 for Figure 3 Enlarged view of a portion of point A in the middle.

[0031] As shown in the figure, the cooling wall 100 includes a heat exchange layer 110, a support layer 120, and a wear-resistant layer 130. The support layer 120 and the wear-resistant layer 130 are respectively disposed on both sides of the heat exchange layer 110. The heat exchange layer 110 is used to dissipate heat transferred within the blast furnace. The support layer 120 increases the strength of the heat exchange layer 110. The wear-resistant layer 130, being closer to the interior of the blast furnace than the support layer 120, reduces wear on the heat exchange layer, preventing damage to the cooling wall from the internal environment of the blast furnace and thus extending the service life of the cooling wall. In some embodiments, the support layer 120 and / or the wear-resistant layer 130 can be disposed on the heat exchange layer through a composite process or mechanical connection.

[0032] In some embodiments, the heat exchange layer 110 can be made of a high thermal conductivity material, which facilitates the rapid removal of heat transferred from inside the blast furnace. In some embodiments, the high thermal conductivity material can be copper or a copper alloy. In some embodiments, the thickness of the heat exchange layer can be 50mm-90mm.

[0033] In some embodiments, the support layer can be a high-strength material, disposed on the side of the heat exchange layer away from the blast furnace interior, which can improve the mechanical strength of the heat exchange layer and increase the overall stability of the cooling wall structure. In some embodiments, the high-strength material can be steel or stainless steel. For example: Q235 steel, Q345 steel, 20 steel, 304 stainless steel, 310 stainless steel, 310S stainless steel, etc. In some embodiments, the thickness of the support layer can be 10mm-30mm, which helps to reduce the amount of heat exchange layer material used and lower the manufacturing cost of the cooling wall.

[0034] In some embodiments, the wear-resistant layer can be a highly wear-resistant material, disposed on the side of the heat exchange layer near the interior of the blast furnace and covering all or part of the surface of the heat exchange layer, thereby reducing wear on the surface of the heat exchange layer near the interior of the blast furnace. In some embodiments, the highly wear-resistant material can be stainless steel. For example: 304 stainless steel, 310 stainless steel, 310S stainless steel, 316 stainless steel, 316L stainless steel, or other austenitic stainless steels. According to a preferred embodiment of this application, the wear-resistant layer can be 310S stainless steel, which can give the cooling wall good oxidation resistance and corrosion resistance, giving the cooling wall higher creep strength, enabling continuous operation at high temperatures, and exhibiting good high-temperature resistance. In some embodiments, the thickness of the wear-resistant layer is at least 3 mm, which is beneficial for effectively protecting the heat exchange layer. According to one embodiment of this application, the thickness of the wear-resistant layer can be 3-10 mm.

[0035] In some embodiments, the wear-resistant layer can be applied to the heat exchange layer through explosive bonding, laser cladding, or electroplating. This allows for a tight bond between the heat exchange layer and the wear-resistant layer, increasing the bonding strength between them. This effectively prevents damage to the bond caused by high temperatures within the furnace, ensuring the interface between the two layers does not break and affecting the overall stability of the cooling wall structure, thus extending the service life of the cooling wall. In some embodiments, the bonding strength between the wear-resistant layer and the heat exchange layer can be at least 200 MPa. In some embodiments, the wear-resistant layer can also be applied to the heat exchange layer through mechanical inlay, bolting, or welding. This process is simple and easy to manufacture, reducing the manufacturing cost of the cooling wall. In some embodiments, the bonding strength between the wear-resistant layer and the heat exchange layer can be at least 100 MPa.

[0036] In some embodiments, the heat exchange layer 110 includes multiple dovetail grooves 111 on the side near the blast furnace interior, and a wear-resistant layer 130 is disposed on the heat exchange layer 110 and near the top of the multiple dovetail grooves. In some embodiments, the multiple dovetail grooves are arranged parallel and spaced apart on the surface of the heat exchange layer near the blast furnace interior. In some embodiments, the dovetail grooves are located between two adjacent wear-resistant layers, so that the dovetail grooves and wear-resistant layers are staggered on the surface of the heat exchange layer. Alternatively, the dovetail grooves divide the wear-resistant layer into multiple parts, and a wear-resistant layer may not be disposed within the dovetail grooves.

[0037] In some embodiments, the width of the top of the groove or the wear-resistant layer can be 40mm-70mm, which facilitates the connection between the wear-resistant layer and the heat exchange layer, helps to strengthen the connection between the two, and improves the stability of the overall structure of the cooling wall.

[0038] Due to the presence of dovetail grooves, the bonding lines between the wear-resistant layer and the heat exchange layer will increase and become exposed. In some embodiments, there are no gaps between the wear-resistant layer and the heat exchange layer, which can prevent gaps from affecting the connection or bonding strength between the two, making them unable to resist the erosion of the harsh environment inside the furnace and affecting the service life of the cooling wall.

[0039] In some embodiments, the cooling wall 100 may further include one or more cavities 140 disposed between the heat exchange layer 110 and the support layer 120, which can be used to accommodate cooling water, exchange heat with the heat exchange layer, and conduct heat away. In some embodiments, the cavity 140 may occupy part of the heat exchange layer and part of the support layer. In some embodiments, the extending direction of the cavity 140 is perpendicular to the direction of the dovetail groove 111.

[0040] In some embodiments, forming one or more grooves 141 extending along the cavity on the heat exchange layer on at least part or all of the inner surface of the cavity 140 can increase the contact area between the heat exchange layer and the cavity 140, thereby increasing the contact area between the cooling water and the heat exchange layer. This can increase the heat exchange efficiency between the cooling water and the heat exchange layer, which is beneficial for increasing the thermal conductivity of the cooling wall, ensuring the stability of the overall cooling wall structure, extending its service life, and promoting the stable operation and output of the blast furnace. In some embodiments, the grooves 141 can increase the contact area between the heat exchange layer and the cavity by at least 10%.

[0041] In some embodiments, the spacing between the grooves 141 is 5-25 mm. Multiple grooves are equally spaced in the cavity to guide the uniform flow of cooling water, avoiding interference with the fluid flow pattern and thus the cooling water flow rate. In some embodiments, the cross-section of the groove can be rectangular, with a depth of 1-10 mm and a width of 5-25 mm. In some embodiments, the cross-section of the groove can also be other shapes, such as an inverted triangle, with a depth of 1-10 mm and a top edge width of 5-25 mm.

[0042] In some embodiments, the cavity 140 may include a chamfer on one side of the support layer 120 to form a horseshoe-shaped cavity cross-section, thereby occupying part of the support layer, which can increase the cross-sectional area of ​​the cavity, which is beneficial to increasing the cooling water flow rate, accelerating the heat removal efficiency of the heat exchange layer, and contributing to the stability of the overall cooling wall structure and extending the service life of the cooling system.

[0043] In some embodiments, the cooling wall may further include an inlet pipe 101 and an outlet pipe 102. Both the inlet pipe 101 and the outlet pipe 102 are disposed on the support layer 120 and communicate with both ends of the cavity 140, respectively, to accommodate cooling water entering and exiting the cavity 140. In some embodiments, the inlet pipe and the outlet pipe have the same cross-sectional size as the cavity 140 to prevent changes in pipe cross-section from affecting the flow rate of the cooling water.

[0044] Although this application provides a wear-resistant layer on the side of the cooling wall closest to the blast furnace interior, to further increase the service life of the cooling wall and to prevent the cooling wall from being directly exposed to the blast furnace interior, this application has made corresponding improvements to the side of the cooling wall closest to the blast furnace interior. These will be described in detail below.

[0045] Figure 5 This is a schematic diagram of a cooling wall for a blast furnace according to an embodiment of this application. Figure 6 for Figure 5 Enlarged view of section B in the middle.

[0046] As shown in the figure, the cooling wall 500 includes a heat exchange layer 510, a support layer 520, and a wear-resistant layer 530. The support layer 520 and the wear-resistant layer 530 are respectively disposed on both sides of the heat exchange layer 510, similar to the embodiment in Figure 1, and therefore will not be described again here. In some embodiments, the cooling wall 500 may further include multiple slag hooks 540, which are disposed on the wear-resistant layer and extend into the blast furnace, providing a slag-hanging base for the cooling wall and increasing the slag adhesion. In some embodiments, the slag hooks may be made of steel or stainless steel, facilitating their connection to the wear-resistant layer, and ensuring that the connection is not damaged by the high temperature of the blast furnace, thus increasing the overall stability of the cooling wall structure.

[0047] In some embodiments, the slag hook 540 includes a main rod 541 and a plurality of slag-hanging rods 542. One end of the main rod 541 is connected to the wear-resistant layer 530, and the plurality of slag-hanging rods 542 are connected to the other end of the main rod 541 and extend outward in different directions. In some embodiments, the slag-hanging rods extend at an angle between them. The angle can be 30-120 degrees. In some embodiments, the slag hook can be integrally formed to increase the overall structural strength of the slag hook. In some embodiments, the slag hook can also be formed by welding, which facilitates the manufacturing of the slag hook.

[0048] In some embodiments, the heat exchange layer 510 includes multiple dovetail grooves 511 on the side near the interior of the blast furnace. A heat-resistant layer 530 is disposed on the heat exchange layer 510 and near the top of the dovetail grooves, similar to the embodiment in Figure 1, and therefore will not be described again here. In some embodiments, multiple slag hooks are arranged at equal or unequal intervals on the heat-resistant layer 530 near the top of the grooves, staggered with the dovetail grooves, so as not to affect the cooperation between the dovetail grooves and other components.

[0049] In some embodiments, the heat exchange layer 510 near the blast furnace includes multiple refractory elements disposed at the dovetail groove and spaced apart from multiple slag hooks, which can protect the dovetail groove and prevent it from being directly exposed to the blast furnace interior. In some embodiments, the rows of refractory elements disposed at the dovetail groove and the rows of slag hooks disposed on the wear-resistant layer are also spaced apart. In some embodiments, the slag hooks 540 can also be inserted into the refractory elements, and the slag hooks and dovetail grooves can fix the refractory elements in place, preventing them from detaching from the cooling wall.

[0050] refer to Figure 7 , Figure 7 This is a schematic diagram of a cooling wall according to an embodiment of this application. In some embodiments, the refractory component may be Si3N4-SiC brick 710, which has the characteristics of high density, high strength, good thermal shock stability, corrosion resistance, and good thermal conductivity, and can effectively protect the cooling wall and smoothly dissipate heat. In some embodiments, the Si3N4-SiC bricks may be closely arranged in the dovetail groove, with the surface protruding from the cooling wall tightly bonded to the wear-resistant layer of the top of the adjacent dovetail groove, and extending into the blast furnace. In some embodiments, the Si3N4-SiC bricks may also be staggered in the dovetail groove. In some embodiments, slag hooks may be inserted into the Si3N4-SiC bricks.

[0051] refer to Figure 8 , Figure 8 This is a schematic diagram of a cooling wall according to another embodiment of this application. In some embodiments, the refractory component may also be steel brick 810, which has the characteristics of wear resistance and easy slag adhesion, effectively protecting the cooling wall, increasing its wear resistance, and facilitating slag adhesion to protect it, thus greatly increasing its service life. In some embodiments, placing steel bricks in the dovetail groove can increase the service life of the cooling wall by 2-5 years. In some embodiments, placing steel bricks in the dovetail groove can improve the wear resistance of the cooling wall by at least 20%, thereby greatly increasing its service life.

[0052] In some embodiments, multiple steel bricks 810 may be arranged in rows or spaced apart at the dovetail groove. For example... Figure 8As shown, multiple steel bricks are arranged in rows within the same dovetail groove, with a certain spacing between adjacent bricks. This allows the bricks to be distributed throughout the heat exchange layer, facilitating slag buildup on the cooling wall and preventing slag from easily falling off, effectively protecting the cooling wall and extending its service life. In some embodiments, multiple steel bricks are arranged at equal intervals within the same dovetail groove. In other embodiments, multiple steel bricks can be arranged in rows with intervals in different dovetail grooves. For example, multiple steel bricks can be arranged horizontally, vertically, or diagonally. Two adjacent dovetail grooves can have steel bricks placed in only one groove, creating a certain gap between adjacent bricks. This allows the adjacent bricks to work in conjunction with the slag hooks, promoting rapid slag buildup and further protecting the cooling wall, thus increasing its service life.

[0053] refer to Figure 9 , Figure 9 This is a schematic diagram of a cooling wall according to another embodiment of this application. In some embodiments, the steel brick 810 may also span at least two dovetail grooves 511. (Reference) Figure 10 , Figure 10 This is a schematic diagram of a steel brick according to one embodiment of this application. In some embodiments, the steel brick 810 includes a brick body 811 and one or more bosses 812 extending outward from the brick body. The bosses 812 are complementary in shape to the dovetail grooves 511. The top of the dovetail groove is close to the wear-resistant layer, and the size of the top of the dovetail groove is smaller than that of the bottom of the dovetail groove. The brick body can be installed into multiple dovetail grooves. Fixing the steel brick through multiple dovetail grooves is beneficial to the fixation of the steel brick, which can effectively prevent stress concentration and prevent the steel brick from falling off.

[0054] In some embodiments, the brick 811 extends outward from the cooling wall and is tightly abutted against the wear-resistant layer on the top of the adjacent dovetail groove. The steel brick 810 may also include a connector 813, which can further fix the steel brick to the wear-resistant layer area between the dovetail grooves. The connector 813 connects the brick tightly abutted against the wear-resistant layer on the top of the adjacent dovetail groove to the wear-resistant layer, thereby further strengthening the connection between the steel brick and the cooling wall, making the steel brick less prone to loosening, resulting in a more stable structure and better protection of the cooling wall. In an exemplary embodiment, the connector can be a bolt. Since the wear-resistant layer is stainless steel, connecting the steel brick to the stainless steel wear-resistant layer with bolts can avoid the problem of connection failure due to the different thermal expansion coefficients of different materials being affected by the high temperature inside the furnace. Multiple steel bricks 810 can be arranged in rows and spaced apart in the dovetail grooves, and... Figure 8 The implementation examples are similar, so they will not be repeated here.

[0055] In some embodiments, multiple refractory components may further include a spray coating (not shown in the figure) that can completely cover the heat exchange layer. This allows the spray coating to completely cover the wear-resistant layer, slag hooks, or refractory components, thereby further increasing the high-temperature resistance and wear resistance of the cooling wall surface. When the cooling wall is installed inside the blast furnace, the spray coating is in direct contact with the furnace interior. When the furnace environment damages the spray coating, the wear-resistant layer and / or refractory components protect the cooling wall. Furthermore, the slag hooks and / or refractory components assist in the rapid formation of a slag skin on the cooling wall surface, which protects the cooling wall. Even after the slag skin detaches, the wear-resistant layer and / or refractory components still protect the cooling wall, preventing the heat exchange layer from being directly exposed to the blast furnace interior. Even if the spray coating / refractory components or slag skin completely fail, the wear-resistant layer still protects the heat exchange layer, preventing direct exposure and significantly improving the service life of the cooling wall. In some embodiments, the thickness of the spray coating can be 100-160 mm.

[0056] In some embodiments, a castable refractory (not shown in the figures) may be further included on multiple refractory components, which can completely cover the heat exchange layer and extend above the refractory components and slag hooks. In some embodiments, the castable refractory may be based on corundum, with at least 10% added metal steel fibers, and mixed with other auxiliary materials. Compared to sprayed coatings, it is more compact, which can greatly improve the high-temperature resistance and wear resistance of the cooling wall, and can also improve the strength, toughness, and thermal shock resistance of the cooling wall. In some embodiments, the thickness of the castable refractory may be 100-160 mm.

[0057] In practical applications of this technology, when the cooling wall is installed inside the blast furnace, the castable refractory is in direct contact with the furnace interior. After a period of use, when the harsh furnace environment may damage the castable refractory, the wear-resistant layer and / or refractory components will protect the cooling wall. Furthermore, the slag hooks and / or refractory components will assist in quickly forming a slag skin on the surface of the cooling wall, which will also protect it. After a further period of use, the slag skin may detach, and the wear-resistant layer and / or refractory components will again protect the cooling wall. This prevents the heat exchange layer from being directly exposed to the blast furnace interior. Even if the castable refractory components or slag skin completely fail after a certain period of use, the wear-resistant layer will still protect the heat exchange layer, preventing it from being directly exposed to the blast furnace interior. Through this layered and progressive protection, the service life of the cooling wall can be greatly improved, allowing for timely replacement during blast furnace shutdown maintenance cycles. This meets the requirements for blast furnace shell protection and is beneficial for the stable operation and output of the blast furnace.

[0058] The above embodiments are for illustrative purposes only and are not intended to limit the present invention. Those skilled in the art can make various changes and modifications without departing from the scope of the present invention. Therefore, all equivalent technical solutions should also fall within the scope of the present invention.

Claims

1. A cooling wall for a blast furnace, the cooling wall comprising a heat exchange layer for dissipating heat transferred inside the blast furnace; characterized in that, The cooling wall further includes: a support layer, a wear-resistant layer, multiple steel bricks, and multiple cavities, and the heat exchange layer has multiple dovetail grooves; wherein, The support layer is used to increase the strength of the heat exchange layer. The heat exchange layer is located between the support layer and the wear-resistant layer. The wear-resistant layer faces the inside of the blast furnace and is used to reduce the wear of the heat exchange layer. Multiple cavities are located between the heat exchange layer and the support layer to accommodate the passage of cooling water; Multiple dovetail grooves are disposed on one side of the heat exchange layer near the interior of the blast furnace. These grooves are spaced apart, dividing the wear-resistant layer into multiple spaced areas. Each dovetail groove is located between adjacent wear-resistant layers, with its top close to the wear-resistant layer and its top dimension smaller than its bottom dimension. Multiple steel bricks are disposed at one or more of the dovetail grooves; wherein, each steel brick includes a brick body and multiple protrusions extending outward from the brick body, the protrusions being complementary in shape to the dovetail grooves, so as to enable the brick body to be installed at multiple dovetail grooves; the multiple steel bricks are arranged in rows and spaced apart at the dovetail grooves.

2. The cooling wall according to claim 1, characterized in that, The brick extends outward and adheres tightly to the wear-resistant layer.

3. The cooling wall according to claim 1, characterized in that, The steel brick further includes a connector located on the wear-resistant layer area between two adjacent dovetail grooves, and the connector is used to connect the steel brick to the wear-resistant layer.

4. The cooling wall according to claim 1, characterized in that, Multiple slag hooks are provided on the wear-resistant layer.

5. The cooling wall according to claim 1, characterized in that, The plurality of steel bricks are further provided with castable refractory.

6. The cooling wall according to claim 5, characterized in that, The plurality of steel bricks further include a coating material that covers the heat exchange layer.

7. The cooling wall according to claim 1, characterized in that, The multiple steel bricks are distributed throughout the heat exchange layer in a dispersed manner to prevent large-area detachment of refractory material or slag.

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