Hot blast stove structure, furnace body manhole masonry and hot blast stove masonry method

Abstract

The invention discloses a hot-blast stove structure, a stove body manhole masonry and a hot-blast stove masonry method, and relates to the technical field of internal combustion hot-blast stoves, the hot-blast stove structure comprises a stove body and a gas pipeline connector, the gas pipeline structure is communicated with the interior of the stove body, and a material conveying channel is arranged at the gas pipeline connector; one end of the material conveying channel is communicated with the gas pipeline interface, and the other end is arranged on the ground; a portal frame is arranged at the vault of the furnace body and is provided with a hoisting piece; a metal protection layer is laid on the inner wall of the gas pipeline connector; the furnace body is sequentially provided with a gas pipeline connector, an air through opening, a furnace body manhole, a hot air outlet and a furnace top manhole from bottom to top. According to the hot blast stove, the material conveying channel and the gas pipeline connector are integrated, waste refractory material gravity conveying and new refractory material direct conveying are achieved, blocking and secondary carrying are avoided, and the construction efficiency is improved. The vault portal frame is matched with the multi-point hoisting piece to achieve material supply and construction progress synchronization, and the problems of construction interruption and resource waste are solved.

Description

Technical Field

[0001] This application relates to the field of internal combustion hot blast stove technology, and in particular to a hot blast stove structure, furnace body manhole construction, and hot blast stove construction method. Background Technology

[0002] As a core piece of equipment in the blast furnace ironmaking process, the performance of the refractory materials (refractory linings) of the hot blast stove directly affects its service life, thermal efficiency, and safety. During the operation cycle of the hot blast stove, due to the long-term effects of high temperature, chemical corrosion, and mechanical stress, the refractory linings will gradually deteriorate and need to be dismantled and replaced periodically.

[0003] However, in existing methods, the dismantled waste refractory materials must be transported out through limited channels (such as manholes and pipes), without a dedicated material transport channel design, which easily leads to blockages or secondary handling, increasing the construction period and cost. Furthermore, the hoisting and masonry of refractory materials often employs single-point hoisting or batch transportation, making it difficult to synchronize material supply with construction progress, easily causing construction interruptions or resource waste. These problems urgently need to be addressed. Summary of the Invention

[0004] This application provides a hot blast stove structure, furnace body manhole construction, and hot blast stove construction method.

[0005] A first aspect of this application provides a hot blast stove structure, comprising: The furnace body includes a gas pipeline interface. The gas pipeline structure is connected to the interior of the furnace body. A material conveying channel is provided at the gas pipeline interface. One end of the material conveying channel is connected to the gas pipeline interface, and the other end is used to be arranged on the ground. The furnace body is equipped with a gantry frame on its dome, and the gantry frame is fitted with lifting components; The inner wall of the gas pipeline interface of the furnace body is covered with a metal protective layer; The furnace body is provided with a gas pipeline interface, an air inlet, a furnace body manhole, a hot air outlet, and a furnace top manhole from bottom to top.

[0006] In some embodiments, the material conveying channel is inclined relative to the furnace body, and the angle between the material conveying channel and the height direction of the furnace body is in the range of 30°-60°, and the diameter of the material conveying channel is 800mm-1500mm.

[0007] In some embodiments, a detachable working ladder is provided inside the furnace body. The working ladder is assembled from a multi-stage steel ladder structure, with each stage having a height of less than or equal to 2 meters. The working ladder is connected to the manhole on the furnace top and extends into the furnace body step by step.

[0008] In some embodiments, embedded parts are provided on the inner side of the arch; The gantry frame is horizontally installed inside the arch. Shear steel plates are installed at both ends of the load-bearing beams of the gantry frame, and the shear steel plates are connected to the embedded parts.

[0009] In some embodiments, the device further includes a sealing plate, the size of which is smaller than the inner diameter of the gas pipeline interface, and the sealing plate has lifting slots on both sides.

[0010] In some embodiments, the inner wall of the manhole of the furnace body is provided with a plurality of refractory bricks, the interior of which is filled with semi-circular refractory bricks, and a baffle plate and a cover are provided on the outer side of the manhole of the furnace body, the baffle plate and the cover being fastened by bolts.

[0011] In some embodiments, a sealing plate is welded to the outer edge of the manhole in the furnace body for sealing purposes.

[0012] In some embodiments, the connection between the gas pipeline and the furnace body adopts a double flange sealing structure, and the flange gap is filled with a high-temperature resistant graphite gasket.

[0013] A second aspect of this application provides a method for constructing manholes in a furnace body, applicable to the construction of manholes in a hot blast stove structure, comprising: Inside the furnace body, multiple refractory bricks are arranged around the inner wall of the manhole, and refractory materials are used for casting. Multiple semi-circular refractory bricks are filled into the manhole of the furnace body so that the refractory bricks and the inner wall of the furnace body are on the same working surface, and mud is applied to the surface. A sealing plate is welded to the manhole on the outside of the furnace body for sealing. A cover is fixed to one side of the obstruction plate using bolts.

[0014] A third aspect of this application provides a hot blast stove masonry method, applied to the masonry of hot blast stove structures, comprising: Remove the gas pipeline connected to the furnace body and lay a metal protective layer on the inner wall of the gas pipeline interface to stabilize the gas pipeline interface structure. A gantry frame and hoisting components are installed on the dome of the furnace body as the main equipment for hoisting refractory materials; The sealing plate is transported into the furnace body through the gas pipeline interface and hoisted above the checker bricks in the regenerator chamber using hoisting equipment for storage and later use. According to the progress of refractory lining, the sealing plates will be hoisted down from above the checker bricks of the heat storage chamber to the construction area to ensure that the material supply is synchronized with the construction needs; The furnace body has openings from bottom to top, including air inlets, furnace manholes, and hot air outlets, which are arranged sequentially above the gas pipe interfaces. Depending on the masonry height, refractory materials are transported in through the openings at the corresponding heights to complete the masonry of the partition wall refractory materials and the burners. After sealing the manhole inside the furnace body, the workers exited the hot blast stove through the manhole on the top of the furnace and completed the construction of the manhole on the top of the furnace. Reinstall the gas pipeline and connect it to the gas pipeline interface of the furnace body through a double flange sealing structure; High-temperature resistant graphite gaskets are filled into the flange gap; Use a hydraulic torque wrench to tighten the flange bolts, ensuring a secure connection and proper function, to complete the installation process.

[0015] Compared to existing technologies, this hot blast stove integrates the material conveying channel with the gas pipeline interface, enabling gravity transport of scrap refractory materials and direct delivery of new refractory materials. This avoids blockages and secondary handling, improving construction efficiency. The arched gantry frame, combined with multi-point hoisting components, synchronizes material supply with construction progress, resolving issues of construction interruptions and resource waste. A metal protective layer is laid on the inner wall of the gas pipeline interface to prevent chemical corrosion, balance the temperature field, and extend the life of the refractory materials. The rational layout of functional openings, combined with overall structural optimization, enhances equipment safety and reliability, ensuring stable operation of the blast furnace for ironmaking. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the hot blast stove structure according to an embodiment of this application; Figure 2 This is a partial enlarged view of the top of the hot blast stove according to an embodiment of this application.

[0017] Explanation of reference numerals in the attached figures: 10. Furnace body; 11. Gas pipeline interface; 12. Air vent; 13. Furnace body manhole; 14. Hot air outlet; 15. Furnace top manhole; 20. Material conveying channel; 30. Gantry frame; 31. Lifting components; 40. Working ladder; 50. Checker bricks for heat storage chamber. Detailed Implementation

[0018] To better understand the technical solutions provided in the embodiments of this specification, the technical solutions of the embodiments of this specification will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments of this specification and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of this specification, rather than limitations on the technical solutions of this specification. In the absence of conflict, the embodiments of this specification and the technical features in the embodiments can be combined with each other.

[0019] In this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, without necessarily requiring or implying any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. The term "two or more" includes two or more cases.

[0020] like Figure 1-2 As shown, in a first aspect of this application, a hot blast stove structure is provided, comprising: The furnace body 10 includes a gas pipeline interface 11. The gas pipeline structure is connected to the interior of the furnace body 10. A material conveying channel 20 is provided at the gas pipeline interface 11. One end of the material conveying channel 20 is connected to the gas pipeline interface 11, and the other end is used to be arranged on the ground. The dome of the furnace body 10 is equipped with a gantry frame 30, and the gantry frame 30 is equipped with a hoisting component 31; The inner wall of the gas pipeline interface 11 of the furnace body 10 is covered with a metal protective layer. The furnace body 10 is provided with a gas pipeline interface 11, an air inlet 12, a furnace body manhole 13, a hot air outlet 14, and a furnace top manhole 15 from bottom to top.

[0021] Understandably, the furnace body 10, as the main structure of the hot blast stove, is constructed with multi-layer composite refractory materials, forming a high-temperature combustion and heat exchange space inside. From bottom to top, the gas pipeline interface 11, air inlet 12, furnace body manhole 13, hot air outlet 14, and furnace top manhole 15 are arranged to realize the input of gas and air and the output of hot air, while also taking into account the needs of construction and maintenance.

[0022] A dedicated material transport channel 20 is added at the gas pipeline interface 11. The channel has a circular or rectangular cross-section, with one end connected to the interior of the gas pipeline interface 11 and the other end extending inclinedly to the ground, forming a straight material transport path. This solves the problem in existing technologies where waste refractory materials need to be transported through manholes or narrow pipes. The dedicated channel enables gravity transport of refractory materials from top to bottom, avoiding blockages.

[0023] The gantry frame 30 is made of steel, specifically Q355B steel, and is fixed to the concrete foundation of the furnace body 10 arch. Its span covers the furnace top working area and can be 8-12m. It has a load-bearing capacity of ≥50 tons and can meet the hoisting requirements of refractory blocks.

[0024] The gantry 30 is equipped with a track beam on top and is equipped with an electric hoist or bridge crane to realize the horizontal movement and vertical lifting and lowering of the hoisting component 31.

[0025] A metal protective layer is installed inside the gas pipeline interface 11. The metal protective layer can be made of high-temperature resistant alloy steel plate, such as 310S stainless steel or nickel-based alloy, with a thickness of 8-12mm. It is fixed to the refractory base layer by anchoring nails to form a composite protective structure combining metal and refractory.

[0026] The gas pipeline interface 11 is located at the bottom of the furnace body and can be connected to blast furnace gas, which mixes with air and burns to provide a heat source. An air inlet 12 is located above the gas pipeline interface 11 and is used to connect combustion air to form a combustion system with the gas. The furnace body manhole 13 is located in the middle area of ​​the furnace body 10 and is used for construction personnel to enter and exit, for the initial handling of refractory materials, and for the maintenance of internal equipment. Hot air outlet 14 is located in the upper area of ​​manhole 13 in the furnace body and is used to output high-temperature hot air. Manhole 15 on the furnace top is located at the center of the dome and is used for refractory lining, installation of gantry 30 and maintenance of top equipment.

[0027] This hot blast stove integrates a material conveying channel 20 with a gas pipeline interface 11, enabling gravity transport of waste refractory materials and direct delivery of new refractory materials, avoiding blockages and secondary handling, and improving construction efficiency. The arched gantry frame 30, in conjunction with multi-point hoisting components 31, ensures synchronized material supply and construction progress, resolving issues of construction interruptions and resource waste. The inner wall of the gas pipeline interface 11 is lined with a metal protective layer to prevent chemical corrosion, balance the temperature field, and extend the service life of the refractory materials. The rational layout of functional openings, combined with overall structural optimization, enhances equipment safety and reliability, ensuring stable operation of the blast furnace ironmaking process.

[0028] In some embodiments, the material conveying channel 20 is inclined relative to the furnace body 10, and the angle between the material conveying channel 20 and the furnace body 10 in the height direction is in the range of 30°-60°, and the diameter of the material conveying channel 20 is 800mm-1500mm.

[0029] Understandably, the material conveying channel 20 is inclined with an angle between 30° and 60°, or even 45°. This inclination angle can utilize the gravity of the material to achieve smooth sliding, avoid obstruction of sliding due to an angle that is too small, and prevent material impact damage to the inner wall of the channel due to an angle that is too large.

[0030] The material conveying channel has a diameter of 20800mm-1500mm, which can accommodate refractory materials of different sizes. It can accommodate large refractory blocks weighing 2-5 tons each, while avoiding increasing the overall structural burden of the hot blast stove due to excessive diameter.

[0031] The above structure can ensure the efficiency and stability of refractory material transportation, reduce the risk of blockage while ensuring the rapid passage of materials, further shorten the construction cycle, reduce construction costs, and achieve a balance between material transportation and the structural strength of the hot blast stove.

[0032] In some embodiments, a detachable working ladder 40 is provided inside the furnace body 10. The working ladder 40 is assembled from a multi-stage steel ladder structure, with each stage having a height of less than or equal to 2 meters. The working ladder 40 is connected to the manhole 15 on the furnace top and extends into the furnace body 10 step by step.

[0033] Understandably, the detachable work ladder 40 adopts a multi-stage steel ladder structure, with each stage not exceeding 2 meters in height. This facilitates climbing and effectively controls the weight of the ladder, making it easy to disassemble and transport.

[0034] The working ladder 40 is connected to the manhole 15 on the furnace top and extends into the furnace, providing a safe and convenient access for construction and maintenance personnel.

[0035] The working ladder 40 has a detachable structure, which allows it to be quickly disassembled and transported out after the work is completed without affecting the subsequent operation of the hot blast stove. At the same time, the length and position of the ladder can be flexibly adjusted during operations such as refractory material replacement to meet different construction height requirements, improve work safety and efficiency, and ensure the smooth progress of hot blast stove maintenance.

[0036] In some embodiments, an embedded part is provided inside the arch; the gantry 30 is horizontally installed inside the arch, and shear steel plates are provided at both ends of the load-bearing beam of the gantry 30, and the shear steel plates are connected to the embedded part.

[0037] Understandably, embedded parts are installed on the inside of the arch to lay the foundation for the installation of the gantry 30.

[0038] The embedded parts are made of high-strength alloy steel and are embedded in the arch concrete structure to ensure a firm bond with the concrete and enhance the anchoring force.

[0039] The gantry 30 spans the inner side of the arch, with its load-bearing beams having shear plates precisely aligned with embedded parts at both ends, secured by high-strength bolts or welding. The shear plates feature anti-slip serrations and positioning holes that match the corresponding structures on the embedded parts, effectively transferring the vertical load and horizontal shear force borne by the gantry 30 and preventing loosening due to swaying during refractory material hoisting. This ensures the stability of the gantry 30, maintaining stability when hoisting 2-5 tons of refractory material, while also facilitating its disassembly and maintenance, providing reliable hoisting support for refractory material replacement operations in the hot blast stove.

[0040] The shear-resistant steel plate is made of high-strength alloy steel plate with a thickness of 20-30mm. The surface is processed with dovetail grooves or serrated textures to increase the friction between the steel plate and the embedded parts. Bolt holes and pin holes are distributed at intervals on the steel plate, which can be accurately fixed to the embedded parts by high-strength bolts and positioning pins.

[0041] The embedded parts adopt a "T" or "L" shaped anchor bar structure with an anchor bar diameter of 25-32mm and a length that penetrates 500-800mm into the arch concrete structure. The ends are bent to form barbs to enhance the anchoring force.

[0042] The embedded parts are welded with connecting plates that correspond one-to-one with the bolt holes of the shear steel plate, with a 10-15mm adjustment margin reserved for easy fine-tuning during installation.

[0043] Both the bolt pre-tightening and weld reinforcement provide dual protection, enabling the gantry 30 to stably bear a load of over 50 tons, effectively resisting the impact and shaking during refractory material hoisting, and ensuring the safe and reliable construction of the hot blast stove.

[0044] In some embodiments, the device further includes a sealing plate, the size of which is smaller than the inner diameter of the gas pipeline interface 11, and the sealing plate is provided with lifting slots on both sides.

[0045] Understandably, the sealing plate is used to install on the outer wall of the heat storage chamber to prevent gas from entering the heat storage chamber and to ensure the thermal efficiency and safety of the hot blast stove.

[0046] Its size is smaller than the inner diameter of the gas pipeline interface 11, which facilitates transportation. It is installed on the side wall of the heat storage chamber to prevent gas from seeping through the gaps.

[0047] In some embodiments, the inner wall of the furnace body manhole 13 is provided with a plurality of refractory bricks, the interior of which is filled with semi-circular refractory bricks, and a blind plate and a cover are provided on the outer side of the furnace body manhole 13, the blind plate and the cover being fastened by bolts.

[0048] Understandably, the inner wall of the furnace manhole 13 is surrounded by multiple refractory bricks to form a high-temperature protective structure. High-alumina or corundum refractory bricks can be used to withstand temperatures above 1000℃.

[0049] The interior is filled with semi-circular refractory bricks, conforming to the arc-shaped structure of the manhole to reduce heat loss and thermal stress concentration. A sealing plate and a cover are installed on the outside of the manhole. The sealing plate is made of high-temperature resistant steel plate, providing initial insulation and protection; the cover is made of insulating material and is bolted to the sealing plate to ensure a tight seal, preventing heat leakage and dust escape. This ensures personnel safety when entering and exiting, meets the airtightness requirements for hot blast stove operation, and is easy to disassemble for convenient internal construction and maintenance of the hot blast stove.

[0050] In some embodiments, a sealing plate is welded to the outer edge of the manhole 13 in the furnace body for sealing.

[0051] Understandably, welding the baffle plate to the outer edge of the manhole 13 in the furnace body enhances the sealing and insulation performance of the hot blast stove. The baffle plate can be made of 8-12mm thick high-temperature resistant steel plate (such as 310S stainless steel), precisely fitted to the contour of the manhole by CNC cutting to ensure a tight weld. The outer surface of the baffle plate is sprayed with a nano-insulating coating to reduce surface temperature and minimize heat loss.

[0052] In some embodiments, the connection between the gas pipeline and the furnace body 10 adopts a double flange sealing structure, and the flange gap is filled with a high-temperature resistant graphite gasket.

[0053] Understandably, double sealing ensures the safety and stability of gas transmission. The high-temperature resistant graphite gasket between the flanges, made of flexible expanded graphite material, maintains good sealing performance within a temperature range of -200℃ to 1650℃ and possesses excellent chemical stability, resisting the corrosion of sulfides, alkali metals, and other media in the gas. During installation, the two flanges are evenly tightened with high-strength bolts, and the pre-tightening force is precisely controlled by a torque wrench, causing the graphite gasket to deform evenly under pressure, filling the flange gap and forming a dense sealing layer, effectively preventing gas leakage. This structure not only facilitates the installation, disassembly, and maintenance of the gas pipeline and the furnace body 10, but also absorbs displacement caused by thermal expansion of the pipeline, avoiding seal failure due to stress concentration, and providing a reliable guarantee for the stable operation of the hot blast stove.

[0054] A second aspect of this application provides a method for constructing a manhole 13 in a furnace body, applicable to the construction of manholes in a hot blast stove structure. The method includes: placing multiple refractory bricks around the inner wall of the manhole 13 inside the furnace body 10, and casting them using refractory materials; filling the manhole 13 with multiple semi-circular refractory bricks so that the refractory bricks and the inner wall of the furnace body 10 are on the same working surface, and applying mortar to the surface; welding a sealing plate to the manhole 13 on the outside of the furnace body 10 for sealing; and fixing a cover to one side of the sealing plate with bolts.

[0055] Understandably, the construction method of the manhole 13 in this furnace body can meet the sealing and high temperature resistance requirements of the hot blast stove.

[0056] During the masonry construction, high-alumina or corundum refractory bricks are first installed around the inner wall of the manhole 13 in the furnace body. The bricks are pre-processed to ensure that the dimensional error is ≤1mm. Low-cement refractory castable is poured into the brick joints using a custom mold, and after vibration and compaction, a monolithic structure is formed, enhancing the refractory and thermal shock resistance performance. Next, semi-circular refractory bricks are embedded to fill the internal space, and a staggered masonry technique is used to ensure uniform stress, making the brick surface flush with the inner wall of the furnace body. Finally, high-temperature bonding mortar is applied to further seal the gaps.

[0057] During the external construction phase, 8-12mm thick high-temperature resistant steel plates are used to weld the sealing plate, and a continuous full welding process is adopted to ensure airtightness. Finally, the heat insulation cover is installed and tightened evenly with high-strength bolts, and double sealing is achieved with sealing strips to prevent heat loss and flue gas leakage, and to ensure the safe operation of the hot blast stove.

[0058] A third aspect of this application provides a hot blast stove masonry method, applied to the masonry of hot blast stove structures, comprising: Remove the gas pipeline connected to the furnace body 10 and lay a metal protective layer on the inner wall of the gas pipeline interface 11 to make the structure of the gas pipeline interface 11 stable. A gantry frame 30 and lifting components 31 are installed on the dome of the furnace body 10 as the main equipment for lifting refractory materials; The sealing plate is transported into the furnace body 10 through the gas pipeline interface 11 and hoisted above the heat storage chamber checker bricks 50 using the hoisting device 31 for storage and later use. According to the progress of refractory lining, the sealing plate will be hoisted down from above the checker bricks 50 in the heat storage chamber to the construction area to ensure that the material supply is synchronized with the construction needs; The furnace body 10 has openings from bottom to top, including an air inlet 12, a furnace body manhole 13, and a hot air outlet 14, which are arranged sequentially above the gas pipe interface 11. Depending on the masonry height, refractory materials are transported in from the openings at the corresponding heights to complete the masonry of the partition wall refractory materials and the burner. After sealing the furnace body manhole 13 inside the furnace body 10, the workers leave the hot blast stove through the furnace top manhole 15 and complete the construction of the furnace top manhole 15; reinstall the gas pipeline and connect the gas pipeline to the gas pipeline interface 11 of the furnace body 10 through the double flange sealing structure; fill the flange gap with high temperature resistant graphite gaskets; use a hydraulic torque wrench to tighten the flange bolts to ensure that the connection is firm and the function is normal, and end the installation process.

[0059] Understandably, this hot blast stove construction method improves construction efficiency and structural stability through process optimization.

[0060] After the gas pipeline is removed, an 8-12mm thick high-temperature resistant alloy steel plate is fixed to the inner wall of the gas pipeline interface 11 with anchor nails to form a metal protective layer, which can strengthen the stability of the gas pipeline interface 11 and effectively resist the corrosion of high-temperature gas.

[0061] A steel gantry frame 30 is installed on the arch, with shear plates at both ends of its load-bearing beam precisely welded to the embedded parts. It is then used in conjunction with an electric hoist or a bridge crane to form a hoisting system, providing stable support for the hoisting of refractory materials.

[0062] The sealing plate is pre-stored above the regenerator via the gas pipeline interface 11. During construction, the lifting device 31 is controlled by a PLC to dynamically lift the sealing plate from above the regenerator to the construction area according to the masonry progress, achieving precise matching between material supply and construction rhythm. During the refractory masonry stage, materials are transported in layers according to the height of the air vent 12, furnace body manhole 13, and hot air outlet 14. A staggered joint masonry process is used to complete the construction of the partition wall and burner, ensuring thermal performance. The furnace body manhole 13 adopts a structure of circumferential refractory bricks and semi-circular infill bricks, with an external welded baffle plate and a sealing cover, providing double protection for airtightness.

[0063] During the reinstallation of gas pipelines, the double-flange sealing structure ensures the flatness of the flange surface through high-precision machining. Flexible graphite gaskets are embedded in the gaps, and bolts are tightened to a preset torque using a hydraulic torque wrench, forming a zero-leakage sealing system. This entire process, through multi-stage collaboration and technological innovation, shortens the construction cycle by approximately 30%, improves sealing performance by 40%, and significantly enhances the operational reliability of the hot blast stove. It should be noted that the descriptions of each embodiment in the above embodiments have different focuses; parts not described in detail in a particular embodiment can be referred to in the relevant descriptions of other embodiments.

[0064] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

[0065] Although preferred embodiments have been described in this specification, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this specification.

[0066] Obviously, those skilled in the art can make various modifications and variations to this specification without departing from its spirit and scope. Therefore, if such modifications and variations fall within the scope of the claims and their equivalents, this specification is also intended to include such modifications and variations.

Claims

1. A hot blast stove structure, characterized in that, include: The furnace body includes a gas pipeline interface, which is connected to the interior of the furnace body. A material conveying channel is provided at the gas pipeline interface, with one end of the material conveying channel connected to the gas pipeline interface and the other end for placement on the ground. The furnace body is equipped with a gantry frame on its dome, and the gantry frame is equipped with lifting components; The inner wall of the gas pipeline interface of the furnace body is covered with a metal protective layer. The furnace body is provided with a gas pipeline interface, an air inlet, a furnace body manhole, a hot air outlet, and a furnace top manhole from bottom to top.

2. The hot blast stove structure according to claim 1, characterized in that, The material conveying channel is inclined relative to the furnace body, and the angle between the material conveying channel and the furnace body in the height direction is in the range of 30°-60°, and the diameter of the material conveying channel is 800mm-1500mm.

3. The hot blast stove structure according to claim 1, characterized in that, The furnace body is equipped with a detachable working ladder, which is assembled from a multi-stage steel ladder structure. Each stage is less than or equal to 2 meters high. The working ladder is connected to the manhole on the top of the furnace and extends into the furnace body step by step.

4. The hot blast stove structure according to claim 1, characterized in that, Embedded parts are provided on the inner side of the arch; The gantry frame is horizontally installed inside the arch, and shear-resistant steel plates are provided at both ends of the load-bearing beam of the gantry frame. The shear-resistant steel plates are connected to the embedded parts.

5. The hot blast stove structure according to claim 1, characterized in that, Also includes: A sealing plate, the size of which is smaller than the inner diameter of the gas pipeline interface, and lifting slots are provided on both sides of the sealing plate.

6. The hot blast stove structure according to claim 1, characterized in that, The inner wall of the manhole of the furnace body is provided with multiple refractory bricks, and the interior of the manhole is filled with semi-circular refractory bricks. A blind plate and a cover are provided on the outside of the manhole of the furnace body, and the blind plate and the cover are fastened together by bolts.

7. The hot blast stove structure according to claim 6, characterized in that, The sealing plate is welded to the outer edge of the manhole in the furnace body for sealing.

8. The hot blast stove structure according to claim 1, characterized in that, The gas pipeline is connected to the furnace body using a double flange sealing structure, with the flange gap filled with high-temperature resistant graphite gaskets.

9. A method for constructing manholes in a furnace body, applied to the construction of manholes in a hot blast stove structure as described in any one of claims 1-8, characterized in that, include: Inside the furnace body, multiple refractory bricks are arranged around the inner wall of the manhole, and refractory materials are used for casting. Multiple semi-circular refractory bricks are filled into the manhole of the furnace body so that the refractory bricks and the inner wall of the furnace body are on the same working surface, and mud is applied to the surface. A sealing plate is welded to the manhole on the outside of the furnace body for sealing. A cover is fixed to one side of the obstruction plate using bolts.

10. A method for constructing a hot blast stove, applied to the construction of a hot blast stove structure as described in any one of claims 1-8, characterized in that, include: Remove the gas pipeline connected to the furnace body and lay a metal protective layer on the inner wall of the gas pipeline interface to stabilize the gas pipeline interface structure. A gantry frame and lifting components are installed on the dome of the furnace body as the main equipment for lifting and transporting refractory materials; The sealing plate is transported into the furnace body through the gas pipeline interface and hoisted above the checker bricks of the regenerator chamber using hoisting equipment for storage and later use. According to the progress of refractory lining, the sealing plate will be hoisted down from above the grid bricks of the heat storage chamber to the construction area to ensure that the material supply is synchronized with the construction needs; The furnace body, from bottom to top, includes an air inlet, a furnace manhole, and a hot air outlet, which are arranged sequentially and at intervals above the gas pipeline interface. Depending on the masonry height, refractory material is transported in through the inlet at the corresponding height to complete the masonry of the partition wall refractory material and the burner. After sealing the manhole inside the furnace body, the workers exited the hot blast stove through the manhole on the top of the furnace and completed the construction of the manhole on the top of the furnace. Reinstall the gas pipeline and connect it to the gas pipeline interface of the furnace body through a double flange sealing structure; High-temperature resistant graphite gaskets are filled into the flange gap; Use a hydraulic torque wrench to tighten the flange bolts, ensuring a secure connection and proper function, to complete the installation process.

Images