Cooling water jacket for blast furnace and blast furnace cooling wall

Abstract

The invention provides a cooling water jacket for a blast furnace and a blast furnace cooling stave. The cooling water jacket comprises a cooling plate main body, and a cooling channel is arranged in the cooling plate main body; cooling channels are formed in the cooling plate main body, the wear-resistant protection bosses are also arranged in the wear-resistant protection bosses, the multiple wear-resistant protection bosses are distributed on the cooling plate main body at equal intervals so that every two adjacent wear-resistant protection bosses and the cooling plate main body can define a groove, and the extending direction of the grooves is not perpendicular to the center line of the blast furnace; and the heat conductivity coefficient of the cooling plate main body is higher than that of the wear-resistant protective boss, so that the cooling plate main body is flush with slag crust on the outer side of the wear-resistant protective boss or a flow guide groove parallel to the groove is formed in the outer side of the slag crust. The blast furnace cooling wall comprises the cooling water jacket for the blast furnace. The problem that the overall service life is short due to the fact that the edge area of a cooling water jacket in the prior art is prone to damage under the impact of coal gas flow is solved.

Description

Technical Field

[0001] This invention relates to the field of blast furnace cooling technology, and particularly to a cooling water jacket and a blast furnace cooling wall for blast furnaces. Background Technology

[0002] The blast furnace wall is one of the key factors affecting the longevity of a blast furnace. The blast furnace wall typically includes the furnace shell and cooling walls located within the shell, with the cooling walls composed of multiple cooling water jackets assembled together. The belly, waist, and lower part of the blast furnace are located in the high-temperature and molten zone, where operating temperatures can reach over 1200℃. Under the long-term combined effects of numerous destructive factors such as the impact of high-temperature gas flow, erosion by molten slag and iron, wear of the furnace charge, and chemical corrosion by alkali metals and zinc, the cooling walls in this area are prone to overheating. Therefore, the fundamental solution to extending the blast furnace's lifespan is to establish a rationally structured cooling wall system that prevents overheating under blast furnace smelting conditions.

[0003] Existing blast furnace cooling walls are usually copper cooling walls. Copper cooling walls can provide sufficient cooling intensity through their high thermal conductivity, thereby avoiding overheating. When the refractory material or refractory bricks on the copper cooling wall are eroded and damaged to a certain extent, the high thermal conductivity of the copper cooling wall allows the newly created temperature of the slag layer on the outside of the cooling wall to protect itself.

[0004] However, damage to some cooling water jackets on the copper cooling wall still occurs. These damaged jackets exhibit warping due to excessive thermal stress, specifically large temperature differences between different areas, leading to overall or edge warping. Furthermore, localized wear also exists. This is because, to enhance slag adhesion, multiple transversely arranged dovetail grooves are typically incorporated into the cooling water jacket to hold the slag. However, the dovetail grooves result in an uneven outer surface of the slag after forming, leading to greater impact from the gas flow and causing the slag to easily detach. Even with existing designs featuring staggered dovetail grooves to guide and disperse the gas flow and reduce its velocity, the impact and friction at the outermost edge are not effectively controlled. Consequently, severe edge wear still occurs, necessitating replacement of the entire cooling water jacket. Summary of the Invention

[0005] Based on this, the purpose of the present invention is to provide a cooling water jacket and a cooling wall for a blast furnace, which aims to solve the problem that the edge area of ​​the cooling water jacket is easily damaged under the impact of the gas flow, resulting in a low overall service life.

[0006] A cooling water jacket for a blast furnace according to an embodiment of the present invention includes: A cooling plate body, wherein a cooling channel is provided inside the cooling plate body; Wear-resistant protective protrusions are provided, and the cooling channels are also provided inside the wear-resistant protective protrusions. Multiple wear-resistant protective protrusions are equidistantly distributed on the cooling plate body so that two adjacent wear-resistant protective protrusions and the cooling plate body enclose a groove. The extension direction of the groove is not perpendicular to the center line of the blast furnace. The thermal conductivity of the cooling plate body is higher than that of the wear-resistant protective protrusion, so that the slag on the outside of the cooling plate body and the wear-resistant protective protrusion are flush or that a guide groove parallel to the groove is formed on the outside of the slag.

[0007] In addition, a blast furnace cooling water jacket according to the above embodiments of the present invention may also have the following additional technical features: Preferably, the wear-resistant protective boss is inclinedly disposed on the cooling plate body, and flow channel grooves are provided on both sides of the wear-resistant protective boss. The extension direction of the flow channel grooves is consistent with the extension direction of the wear-resistant protective boss. Multiple flow channel grooves are arranged along the height direction of the wear-resistant protective boss to form a flow channel group, and multiple flow channel groups are distributed at intervals along the extension direction of the wear-resistant protective boss.

[0008] Preferably, the wear-resistant protective boss has an arc transition above it, and the top of the wear-resistant protective boss has a transition groove that conforms to the shape of the wear-resistant protective boss. The multiple transition grooves are equidistantly distributed along the extension direction of the wear-resistant protective boss.

[0009] Preferably, the cooling water jacket for the blast furnace further includes a liquid flow pipe, and the cooling body and the wear-resistant protective protrusion are each independently provided with a corresponding liquid flow pipe, so that the coolant flows into or out of the cooling channel through the liquid flow pipe.

[0010] Preferably, the liquid flow pipe corresponding to the wear-resistant protective boss includes a connecting section and a pipe section. The connecting section is provided with an external thread on its outer side, and the wear-resistant protective boss is provided with a threaded hole adapted to the external thread. The pipe section is hollow and has through holes on both sides near the connecting section, so that when the connecting section is placed in the threaded hole, the through hole corresponds to the cooling channel.

[0011] Preferably, the cooling channels on the cooling plate body include a first cooling channel and a second cooling channel. The first cooling channel and the second cooling channel respectively enter or exit liquid through two liquid flow pipes. The cooling plate body is divided into a main heat dissipation layer and a secondary heat dissipation layer along the height direction. The main heat dissipation layer and the secondary heat dissipation layer each include a concave region and a rectangular region covered by the concave region. The first cooling channel includes a first outer cooling part disposed on the main heat dissipation layer and a first inner cooling part disposed on the secondary heat dissipation layer. The second cooling channel includes a second inner cooling part disposed on the main heat dissipation layer and a second outer cooling part disposed on the secondary heat dissipation layer. The first outer cooling part and the second outer cooling part are located in the concave region, and the first inner cooling part and the second outer cooling part are located in the rectangular region.

[0012] Preferably, both the first external cooling section and the second external cooling section include a first longitudinal section arranged parallel and symmetrically on both sides of the cooling body and a first connecting section connecting the two first longitudinal sections. Both the first internal cooling section and the second internal cooling section include a second longitudinal section arranged parallel and symmetrically on the inner side of the first longitudinal section and a second connecting section connecting the two second longitudinal sections. The first external cooling section and the first internal cooling section are connected by a first vertical section, and the second external cooling section and the second internal cooling section are connected by a second vertical section. The first longitudinal section of the first external cooling section away from the first vertical section is connected to the liquid flow pipe for liquid inlet, and the second longitudinal section of the second internal cooling section away from the second vertical section is connected to the liquid flow pipe for liquid inlet.

[0013] Preferably, the wear-resistant protective boss has a segmented structure consisting of multiple independent boss sections.

[0014] Preferably, the concave region has the same area as the rectangular region.

[0015] The present invention also provides a blast furnace cooling wall, which includes the above-mentioned blast furnace cooling water jacket.

[0016] This invention provides cooling to the cooling water jacket by using a cooling plate body with cooling channels. Furthermore, by providing wear-resistant protective protrusions on the cooling plate body, the grooves on the cooling water jacket used to enhance slag adhesion are primarily composed of these protrusions. This ensures that even if the slag falls off due to the significant impact of the gas flow, the wear-resistant protective protrusions, due to their material properties, will not easily wear down or be damaged under the impact and friction of the gas flow. Consequently, the slag will regenerate and stack during this period, protecting the cooling water jacket and thus extending its service life. Furthermore, the thermal conductivity of the wear-resistant protective protrusion is worse than that of the main cooling plate, resulting in a thinner slag layer in the wear-resistant protective protrusion area than in the main cooling plate area. Additionally, the height of the main cooling plate is less than that of the wear-resistant protective protrusion in the slag layer thickness direction. This allows the main cooling plate and the outer surface of the wear-resistant protective protrusion to form a slag layer flush with each other. Since the wear-resistant protective protrusion also has cooling channels that are independent of those in the main cooling plate, the relative cooling effect between the main cooling plate and the wear-resistant protective protrusion is controllable. Through proper adjustment, a stable, flush slag layer can be formed on the outer surface, reducing the impact of the gas flow, making the slag layer less prone to falling off, and preventing wear on the cooling water jacket, thus extending its service life.

[0017] Furthermore, forming a stable, flush slag skin on the outermost surface is challenging and requires precise cooling control. This can be addressed by adjusting the position of the wear-resistant protective protrusions; the grooves between adjacent protrusions should not be perpendicular to the furnace centerline. This allows the outermost slag skin to form guide channels aligned with the groove orientation, ensuring the gas flow moves along these channels instead of directly impacting the transverse guide channel sidewalls. This reduces the impact force of the gas flow, making the slag skin less prone to detachment and extending the cooling water jacket's lifespan. Maintaining a flush outer slag skin surface also makes the formation of guide channels along the grooves easier and less difficult to control. Moreover, even if a sudden event causes the slag skin to detach, the groove orientation allows the gas flow to move along the grooves, distributing the impact and friction from the protective protrusions at the edges. This overall wear mitigates localized severe wear, extending the overall lifespan of the cooling water jacket. Therefore, this invention solves the problem in existing technologies where cooling water jackets are prone to edge damage under gas flow impact, resulting in a shorter overall lifespan. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a cooling water jacket for a blast furnace according to one embodiment of the present invention; Figure 2 for Figure 1 A structural diagram from another perspective; Figure 3 This is a schematic diagram of the wear-resistant protective boss in one embodiment of the present invention; Figure 4 This is a schematic diagram of the liquid flow pipe corresponding to the wear-resistant protective boss in one embodiment of the present invention; Figure 5 This is an assembly diagram of the first cooling channel and the second cooling channel in one embodiment of the present invention; Figure 6 This is a schematic diagram of the structure of the first cooling channel in one embodiment of the present invention; Figure 7 This is a schematic diagram of the structure of the second cooling channel in one embodiment of the present invention; Figure 8 This is a schematic diagram of the structure of a cooling water jacket for a blast furnace according to one embodiment of the present invention; Explanation of key component symbols: Detailed Implementation

[0019] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Several embodiments of the invention are illustrated in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

[0020] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0022] Please see Figures 1 to 8 The image shows a blast furnace cooling water jacket according to an embodiment of the present invention, comprising... Cooling plate body 10, cooling channel is provided inside the cooling plate body 10; Wear-resistant protective protrusions 20 are provided, and cooling channels are also provided inside the wear-resistant protective protrusions 20. Multiple wear-resistant protective protrusions 20 are equidistantly distributed on the cooling plate body 10 so that two adjacent wear-resistant protective protrusions 20 and the cooling plate body 10 enclose a groove. The extension direction of the groove is not perpendicular to the center line of the blast furnace. The thermal conductivity of the cooling plate body 10 is higher than that of the wear-resistant protective protrusion 20, so that the slag skin on the outside of the cooling plate body 10 and the wear-resistant protective protrusion 20 is flush or a guide groove parallel to the groove is formed on the outside of the slag skin.

[0023] Understandably, the cooling plate body 10 with cooling channels provides the cooling function of the cooling water jacket base. Furthermore, by setting wear-resistant protective protrusions 20 on the cooling plate body 10, the grooves on the cooling water jacket used to enhance the adhesion of the slag skin are mainly composed of wear-resistant protective protrusions 20. Thus, even if the slag skin falls off due to the large impact force of the gas flow, the wear-resistant protective protrusions 20 themselves will not be easily worn or damaged under the impact and friction of the gas flow due to their material properties. Consequently, the slag skin will regenerate and stack during this period to protect the cooling water jacket, thereby improving the service life of the cooling water jacket. Furthermore, the thermal conductivity of the wear-resistant protective protrusion 20 is worse than that of the cooling plate body 10, resulting in a thinner slag layer in the area of ​​the wear-resistant protective protrusion 20 than in the area of ​​the cooling plate body 10. In addition, the height of the cooling plate body 10 is less than that of the wear-resistant protective protrusion 20 in the slag layer thickness direction. This allows the outer surfaces of the cooling plate body 10 and the wear-resistant protective protrusion 20 to form a slag layer with flush outer surfaces. Since the wear-resistant protective protrusion 20 also has cooling channels that are independent of the cooling channels in the cooling plate body 10, the relative cooling effect between the cooling plate body 10 and the wear-resistant protective protrusion 20 is controllable. Furthermore, through reasonable adjustment, a stable slag layer with a flush outer surface can be formed on the outer side, thereby reducing the impact force of the gas flow, making the slag layer less likely to fall off, and preventing wear on the cooling water jacket, thus extending the service life of the cooling water jacket.

[0024] Furthermore, forming a stable, flush slag skin on the outermost surface is challenging and requires precise cooling control. This can be addressed by adjusting the position of the wear-resistant protective protrusions 20; the groove orientation between adjacent protrusions 20 should not be perpendicular to the furnace centerline. This allows the outermost slag skin to form a guide channel aligned with the groove orientation, ensuring the gas flow moves along this channel instead of directly impacting the transverse guide channel sidewalls. This reduces the impact force of the gas flow, making the slag skin less prone to detachment and extending the cooling water jacket's lifespan. Maintaining a flush outer slag skin surface also makes the formation of guide channels along the grooves easier and less difficult to control. Moreover, even if a sudden event causes the slag skin to detach, the groove orientation allows the gas flow to move along the grooves, distributing the impact and friction on the edge protective protrusions. This overall wear mitigates localized severe wear, extending the overall lifespan of the cooling water jacket. Therefore, this invention solves the problem in existing technologies where cooling water jackets are prone to edge damage under gas flow impact, resulting in a shorter overall lifespan.

[0025] Specifically, the wear-resistant protective boss 20 is inclinedly set on the cooling plate body 10. The wear-resistant protective boss 20 is provided with flow channel grooves 21 on both sides. The extension direction of the flow channel grooves 21 is consistent with the extension direction of the wear-resistant protective boss 20. Multiple flow channel grooves 21 are arranged along the height direction of the wear-resistant protective boss 20 to form a flow channel group. Multiple flow channel groups are distributed at intervals along the extension direction of the wear-resistant protective boss 20. In practical implementation, in order to form an effective guide channel on the outermost slag surface, the wear-resistant protective protrusion 20 can be vertically or inclinedly set on the cooling plate body 10. Although vertically setting the wear-resistant protective protrusion 20 on the cooling plate body 10 can maximize the guiding effect of the guide channel and thus minimize the impact force of the gas flow, the lack of direct fabrication of the groove sidewall means that the slag skin and the groove are connected only by friction. This reduces the adhesion between the slag skin and the wear-resistant protective protrusion 20, causing the slag skin to fall off even under a small gas flow impact. Therefore, the best approach is to set the wear-resistant protective protrusion 20 at a certain preset angle on the cooling plate body 10, which takes into account both the guiding effect of the guide channel and the supporting effect of the groove on the slag skin.

[0026] In addition, in specific implementation, a flow channel groove 21 can be provided on the side of the wear-resistant protective boss 20. The flow channel groove 21 makes the two sides of the wear-resistant protective boss 20 uneven, which further increases the contact area between the slag skin and the wear-resistant protective boss 20. The slag skin will also form a boss in the groove and cooperate with the flow channel groove 21 to form an interlocking structure, which further enhances the adhesion between the slag skin and the wear-resistant protective boss 20.

[0027] Furthermore, when a sudden situation occurs, causing the slag skin to detach and protrude from the groove, thus exposing both the wear-resistant protective protrusion 20 and the cooling plate body 10, the spaced distribution of the flow channel grooves 21 along the extension direction of the wear-resistant protective protrusion 20 causes the gas flow to slow down when passing through the groove, forming a positive pressure gradient, and accelerate when passing through the protrusion, forming a negative pressure gradient. The encounter of the positive and negative pressure gradients triggers turbulence reversal, generating a regular vortex structure, promoting energy diffusion and weakening the wall shear force, significantly reducing frictional resistance. The short grooves increase the wall roughness, forcing the fluid to repeatedly separate and reattach between the convex and concave structures, forming a thin gas-liquid interface to disperse kinetic energy and suppress the generation of large-scale vortices. Consequently, the flow of the gas flow in the groove becomes more stable, and the frictional force between it and the wear-resistant protective protrusion 20 is smaller, indirectly enhancing the wear resistance of the wear-resistant protective protrusion 20. Furthermore, the groove design allows the wear-resistant protective protrusion 20 to bear the impact and wear of the distributed gas flow as a whole, rather than the outer wear-resistant protective protrusion 20 bearing the large impact and friction of the gas flow alone. This avoids the situation where local wear leads to the need to replace the cooling water jacket, thereby improving the service life of the cooling water jacket.

[0028] Additionally, the wear-resistant protective protrusion 20 has a rounded transition above it, and a transition groove 22 conforming to the shape of the wear-resistant protective protrusion 20 is provided on the top of the wear-resistant protective protrusion 20. Multiple transition grooves 22 are equidistantly distributed along the extension direction of the wear-resistant protective protrusion 20. In specific implementations, a rounded transition and a transition groove 22 conforming to the shape of the wear-resistant protective protrusion 20 can also be provided on the wear-resistant protective protrusion 20. This is because the cooling plate body 10 is usually made of copper, which results in a faster slag formation rate at the bottom of the groove. Therefore, by providing a rounded transition and a transition groove 22, the slag between adjacent grooves can be smoothly connected through the rounded transition or the transition groove 22 to enhance the connection strength and assist in the formation of slag at the wear-resistant protective protrusion 20.

[0029] Specifically, the cooling water jacket for the blast furnace also includes a liquid flow pipe 30. The cooling body and the wear-resistant protective protrusion 20 are each independently equipped with a corresponding liquid flow pipe 30, allowing coolant to flow into or out of the cooling channel through the liquid flow pipe 30. In practical implementation, liquid is supplied to or discharged from the cooling channel on the cooling body and the wear-resistant protective protrusion 20 via liquid-cooled fluid pipes, thereby achieving independent control of the cooling effect of the cooling body and the wear-resistant protective protrusion 20.

[0030] Additionally, the liquid flow pipe 30 corresponding to the wear-resistant protective boss 20 includes a connecting section 31 and a pipe section 32. The connecting section 31 has external threads on its outer side, and the wear-resistant protective boss 20 has threaded holes adapted to the external threads. The pipe section 32 is hollow, and through holes 33 are provided on both sides of the pipe section 32 near the connecting section 31, so that when the connecting section 31 is placed in the threaded holes, the through holes 33 correspond to the cooling channels. Furthermore, the wear-resistant protective boss 20 can be a segmented structure composed of multiple independent boss parts. In specific implementations, the wear-resistant protective boss 20 can be connected to the cooling plate body 10 by welding or casting, or it can be fixed to the cooling plate body 10 by screwing. Furthermore, when using a screw-on fixing method, the liquid flow pipe 30 can be configured as a connecting section 31 and a pipe section 32. Threaded holes are then opened at the top of the local cooling channel of the wear-resistant protective boss 20, allowing the connecting section 31 to mate with the threaded holes and the pipe section 32 to mate with the cooling channel. This eliminates the need for additional screws to fix the wear-resistant protective boss 20, avoiding excessive holes in the cooling plate body 10 that could affect the overall structural strength and saving on screw costs. In addition, since existing cooling water jackets are mostly rectangular in shape, and the wear-resistant protective boss 20 is angled, it is difficult to install and design the wear-resistant protective boss 20 at the edges. Therefore, the wear-resistant protective boss 20 can be designed as a segmented structure, facilitating its installation and design. Furthermore, the segmented design of the wear-resistant protective boss 20 also facilitates its replacement. When a section of the wear-resistant protective boss 20 is severely worn, it can be replaced locally, making it easy to disassemble and maintain. In addition, in specific settings, the cooling plate body 10 can also be designed as a parallelogram shape, so that the wear-resistant protective protrusion 20 does not need to be segmented, which also facilitates installation.

[0031] By way of example, and not limitation, in some alternative embodiments, the cooling channels on the cooling plate body 10 include a first cooling channel 40 and a second cooling channel 50. The first cooling channel 40 and the second cooling channel 50 are respectively supplied with or supplied with liquid through two liquid flow pipes 30. The cooling plate body 10 is divided along its height into a main heat dissipation layer 11 and a secondary heat dissipation layer 12. Both the main heat dissipation layer 11 and the secondary heat dissipation layer 12 include a concave region 13 and a rectangular region 14 enclosed by the concave region 13. The first cooling channel 40 includes a first outer cooling portion 41 disposed on the main heat dissipation layer 11 and a first inner cooling portion 42 disposed on the secondary heat dissipation layer 12. The second cooling channel 50 includes a second inner cooling portion 51 disposed on the main heat dissipation layer 11 and a second outer cooling portion 52 disposed on the secondary heat dissipation layer 12. The first outer cooling portion 41 and the second outer cooling portion 52 are located in the concave region 13, and the first inner cooling portion 42 and the second outer cooling portion 52 are located in the rectangular region 14. Furthermore, the concave region 13 and the rectangular region 14 have the same area. By ensuring that the concave region 13 and the rectangular region 14 have the same area, the required cooling area of ​​the two cooling channels is ensured to be consistent, thus ensuring that the cooling effect of both is the same, thereby improving the uniformity of temperature distribution on the main body 10 of the cooling plate. By setting two cooling channels compared to setting one cooling channel, under the condition of the same volume, the flow rate of the two cooling channels and one cooling channel is the same, but the surface area of ​​the two cooling channels is larger, resulting in better cooling effect. Furthermore, by setting different cooling parts in different cooling channels, when dissipating heat from the main heat dissipation layer 11, the two cooling channels dissipate heat from the main heat dissipation layer 11 simultaneously, thereby directly reducing the time for the water to flow through the entire cooling water jacket by half compared to a single cooling channel, greatly improving the cooling efficiency.

[0032] In addition, since the two cooling channels will dissipate heat from the main heat dissipation layer 11 and then from the secondary heat dissipation layer 12, the heat dissipation effect of the secondary heat dissipation layer 12 is poor. However, since the overall volume of the two cooling channels is close to that of the single cooling channel, their flow rates are consistent over a period of time. Consequently, without considering additional heat exchange area, the overall heat dissipation is consistent. Because the two cooling channels dissipate heat to the main heat dissipation layer 11 and then to the secondary heat dissipation layer 12 in sequence, the heat dissipation on the side of the cooling plate body 10 closer to the slag is greater, while the heat dissipation on the other side is less. In contrast, the design of a single cooling channel dissipates heat simultaneously, resulting in a small difference in heat dissipation on both sides. However, since the temperature of the cooling plate body 10 is higher on the side closer to the slag and lower on the other side, the secondary heat dissipation layer 12 needs to dissipate less heat to avoid exceeding the limit compared to the main heat dissipation layer 11. Therefore, while ensuring that the heat at all parts of the cooling plate body 10 is within the limit temperature range, the design of two cooling channels dissipating heat to the main heat dissipation layer 11 and the secondary heat dissipation layer 12 in sequence, compared to the design of a single cooling channel dissipating heat to both sides of the cooling plate body 10 simultaneously, results in a smaller temperature difference between the side of the cooling plate body 10 closer to the slag and the other side, leading to a more uniform temperature distribution and thus less thermal stress. This design effectively improves the overall or edge warping of the cooling water jacket, further increasing its service life. Specifically, the distribution of the main heat dissipation layer 11, the secondary heat dissipation layer 12, the concave region 13, and the rectangular region 14 is as follows: Figure 2 As stated, in which Figure 2 The dashed lines inside are used to distinguish different areas but have no practical meaning and do not exist in actual products.

[0033] Furthermore, both the first external cooling section 41 and the second external cooling section 52 include a first longitudinal section 411 arranged parallel and symmetrically on both sides of the cooling body and a first connecting section 41231 connecting the two first longitudinal sections 411. Both the first internal cooling section 42 and the second internal cooling section 51 include a second longitudinal section 511 arranged parallel and symmetrically on the inner side of the first longitudinal section 411 and a second connecting section 51231 connecting the two second longitudinal sections 511. The first external cooling section 41 and the first internal cooling section 42 are connected by a first vertical section 43, and the second external cooling section 52 and the second internal cooling section 51 are connected by a second vertical section 53. The first longitudinal section 411 of the first external cooling section 41, which is away from the first vertical section 43, is connected to the liquid flow pipe 30 for liquid inlet. The second longitudinal section 511 of the second internal cooling section 51, which is away from the second vertical section 53, is connected to the liquid flow pipe 30 for liquid inlet. In practical implementation, by reasonably adjusting the structure and distribution of the first cooling channel 40 and the second cooling channel 50, the liquid inlet of the first cooling channel 40 corresponds to the liquid outlet of the second cooling channel 50, and the liquid outlet of the first cooling channel 40 corresponds to the liquid inlet of the second cooling channel 50. The remaining positions are also distributed accordingly. This ensures a more uniform temperature distribution between the main heat dissipation layer 11 and the secondary heat dissipation layer 12 of the cooling plate body 10, as well as a more uniform temperature distribution in the rectangular area 14 and the concave area 13. Furthermore, when the first external cooling section 41 dissipates heat from the main heat dissipation layer 11, it first flows through the edges of the cooling plate body 10, thereby greatly suppressing the overheating and warping of the edges of the cooling plate body 10. Additionally, in practical implementation, the first connecting section 41231 and the second connecting section 51231 can be designed as serpentine, curved pipes to ensure effective cooling at all points when the area of ​​the cooling plate body 10 is large.

[0034] In summary, the present invention provides the cooling function of the cooling water jacket base by providing a cooling plate body 10 with cooling channels. Furthermore, by setting wear-resistant protective protrusions 20 on the cooling plate body 10, the grooves on the cooling water jacket used to enhance the adhesion of slag skin are mainly composed of wear-resistant protective protrusions 20. Thus, even if the slag skin falls off due to the large impact force of the gas flow, the wear-resistant protective protrusions 20 themselves will not be easily worn or damaged under the impact and friction of the gas flow due to their material properties. As a result, the slag skin will regenerate and stack during this period to protect the cooling water jacket, thereby improving the service life of the cooling water jacket. Furthermore, the wear-resistant protective protrusion 20 has poorer thermal conductivity than the cooling plate body 10, resulting in a thinner slag layer in the area of ​​the wear-resistant protective protrusion 20 than in the area of ​​the cooling plate body 10. Additionally, the height of the cooling plate body 10 is less than that of the wear-resistant protective protrusion 20 in the slag layer thickness direction. This allows for the formation of a flush slag layer on the outer surfaces of both the cooling plate body 10 and the wear-resistant protective protrusion 20. Since the wear-resistant protective protrusion 20 also has cooling channels that are independent of those in the cooling plate body 10, the relative cooling effect between the cooling plate body 10 and the wear-resistant protective protrusion 20 is controllable. Furthermore, through reasonable adjustment, a stable, flush slag layer can be formed on the outer surface, reducing the impact force of the gas flow and making the slag layer less prone to falling off, thus improving cooling efficiency. The water jacket will not wear down, thus extending its service life. Furthermore, forming a stable, flush slag skin on the outermost surface is challenging and requires precise cooling control. This can be mitigated by adjusting the position of the wear-resistant protective protrusions 20; the groove orientation between adjacent protrusions 20 should not be perpendicular to the furnace centerline. This allows the outermost slag skin to form a guide channel aligned with the groove orientation, ensuring the gas flow moves along this channel instead of directly impacting the transverse guide channel sidewalls on the slag skin. This reduces the impact force of the gas flow, making the slag skin less prone to detachment and extending the cooling water jacket's service life. Maintaining a flush outermost slag skin surface also makes the formation of guide channels along the grooves easier and less difficult to control. Moreover, even if a sudden event causes the slag skin to detach, the groove orientation allows the gas flow to move along the grooves, distributing the impact and friction from the protective protrusions at the edges. This overall wear mitigates localized severe wear, extending the overall service life of the cooling water jacket. Therefore, the present invention solves the problem in the prior art that the cooling water jacket is easily damaged in the edge area under the impact of gas flow, resulting in a low overall service life.

[0035] Furthermore, the present invention also provides a blast furnace cooling wall, which includes the aforementioned blast furnace cooling water jacket. Multiple cooling water jackets are assembled and fixed within the furnace shell to form the blast furnace cooling wall.

[0036] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0037] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A cooling water jacket for a blast furnace, characterized in that, include A cooling plate body, wherein a cooling channel is provided inside the cooling plate body; Wear-resistant protective protrusions, wherein the wear-resistant protective protrusions are provided with cooling channels, and multiple wear-resistant protective protrusions are equidistantly distributed on the cooling plate body so that two adjacent wear-resistant protective protrusions and the cooling plate body form a groove, and the extension direction of the groove is not perpendicular to the center line of the blast furnace. The thermal conductivity of the cooling plate body is higher than that of the wear-resistant protective protrusion, so that the slag on the outside of the cooling plate body and the wear-resistant protective protrusion are flush, or that a guide groove parallel to the groove is formed on the outside of the slag.

2. The blast furnace cooling water jacket according to claim 1, characterized in that, The wear-resistant protective protrusion is inclinedly disposed on the main body of the cooling plate. Flow channel grooves are provided on both sides of the wear-resistant protective protrusion. The extension direction of the flow channel grooves is consistent with the extension direction of the wear-resistant protective protrusion. Multiple flow channel grooves are arranged along the height direction of the wear-resistant protective protrusion to form a flow channel group. Multiple flow channel groups are distributed at intervals along the extension direction of the wear-resistant protective protrusion.

3. The blast furnace cooling water jacket according to claim 1, characterized in that, The wear-resistant protective boss has an arc transition above it, and the top of the wear-resistant protective boss has a transition groove that conforms to the shape of the wear-resistant protective boss. Multiple transition grooves are equidistantly distributed along the extension direction of the wear-resistant protective boss.

4. The blast furnace cooling water jacket according to claim 1, characterized in that, The cooling water jacket for the blast furnace also includes a liquid flow pipe. The cooling body and the wear-resistant protective protrusion are each independently provided with a corresponding liquid flow pipe, so that the coolant flows into or out of the cooling channel through the liquid flow pipe.

5. The blast furnace cooling water jacket according to claim 4, characterized in that, The liquid flow pipe corresponding to the wear-resistant protective boss includes a connecting section and a pipe section. The connecting section has an external thread on its outer side, and the wear-resistant protective boss has a threaded hole adapted to the external thread. The pipe section is hollow, and the pipe section has through holes on both sides near the connecting section, so that when the connecting section is placed in the threaded hole, the through hole corresponds to the cooling channel.

6. The blast furnace cooling water jacket according to any one of claims 1-5, characterized in that, The cooling channels on the main body of the cooling plate include a first cooling channel and a second cooling channel. The first cooling channel and the second cooling channel respectively enter or exit liquid through two liquid flow pipes. The main body of the cooling plate is divided into a main heat dissipation layer and a secondary heat dissipation layer along the height direction. The main heat dissipation layer and the secondary heat dissipation layer each include a concave region and a rectangular region covered by the concave region. The first cooling channel includes a first outer cooling part disposed on the main heat dissipation layer and a first inner cooling part disposed on the secondary heat dissipation layer. The second cooling channel includes a second inner cooling part disposed on the main heat dissipation layer and a second outer cooling part disposed on the secondary heat dissipation layer. The first outer cooling part and the second outer cooling part are located in the concave region, and the first inner cooling part and the second outer cooling part are located in the rectangular region.

7. The blast furnace cooling water jacket according to claim 6, characterized in that, Both the first external cooling section and the second external cooling section include a first longitudinal section arranged parallel and symmetrically on both sides of the cooling body and a first connecting section connecting the two first longitudinal sections. Both the first internal cooling section and the second internal cooling section include a second longitudinal section arranged parallel and symmetrically on the inner side of the first longitudinal section and a second connecting section connecting the two second longitudinal sections. The first external cooling section and the first internal cooling section are connected by a first vertical section, and the second external cooling section and the second internal cooling section are connected by a second vertical section. The first longitudinal section of the first external cooling section away from the first vertical section is connected to the liquid flow pipe for liquid inlet, and the second longitudinal section of the second internal cooling section away from the second vertical section is connected to the liquid flow pipe for liquid inlet.

8. The blast furnace cooling water jacket according to claim 6, characterized in that, The wear-resistant protective boss has a segmented structure consisting of multiple independent boss sections.

9. The blast furnace cooling water jacket according to claim 6, characterized in that, The concave region has the same area as the rectangular region.

10. A blast furnace cooling wall, characterized in that, Includes the blast furnace cooling water jacket as described in any one of claims 1 to 9.

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