Blast furnace stokehole heat insulation plate convenient to maintain

Abstract

The utility model relates to a blast furnace stokehole heat insulation plate convenient to maintain, relates to the field of blast furnace tapping, and aims to solve the problems of repeated operation and material waste of heat insulation plates. The blast furnace stokehole heat insulation plate comprises a steel plate body, the two ends of the steel plate body are arranged in a bent shape, and a plurality of heat insulation fiber plates are arranged on the inner end face of the steel plate body; the multiple heat insulation fiber boards are sequentially spliced and arranged on the inner end face of the steel plate body, amorphous refractory materials used for filling gaps are arranged between the adjacent heat insulation fiber boards, and spraying paint layers used for preventing thermal expansion and cold contraction are arranged at the ends, away from the steel plate body, of the heat insulation fiber boards. The steel plate body is provided with a plurality of anchoring parts used for fixing the heat insulation fiber plate. The method has the effect of reducing the maintenance cost and time.

Description

Technical Field

[0001] The present application relates to the technical field of blast furnace iron tapping, and in particular to a blast furnace front heat insulation board that is easy to maintain. Background Art

[0002] With the rapid development of modern metallurgical technology, blast furnaces, as the core equipment of ironmaking, play a vital role in the ironmaking process; the front of the blast furnace is a key area in the ironmaking process, with extremely high temperatures and harsh environments. In order to prevent the splashing of molten iron when the blast furnace opens the iron mouth from causing harm to the operators and the equipment in front of the furnace, heat insulation boards are generally installed in front of modern blast furnaces. This heat insulation board can not only effectively reduce the temperature in the area in front of the furnace and protect the operators from high temperature burns, but also ensure the stable operation of the equipment in front of the furnace in harsh environments, thereby improving the efficiency and safety of the entire ironmaking process.

[0003] At present, the commonly used insulation board is still in the form of a steel plate covered with a layer of refractory material or using refractory materials on site for temporary protection. Such disadvantages make these temporary protection measures quickly ineffective due to the high temperature environment in front of the furnace, resulting in repeated operations of personnel and waste of materials, so it needs to be improved. Utility Model Content

[0004] In order to solve the problem of repeated operation and material waste of heat insulation boards, the present application provides a blast furnace front heat insulation board that is easy to maintain.

[0005] The present application provides a blast furnace front heat insulation board that is easy to maintain, which adopts the following technical solution:

[0006] A blast furnace front insulation board that is easy to maintain, comprising a steel plate main body, wherein both ends of the steel plate main body are arranged in a bent shape, a plurality of insulation fiber boards are arranged on the inner end surface of the steel plate main body, and the plurality of insulation fiber boards are sequentially spliced ​​and arranged on the inner end surface of the steel plate main body, and an amorphous refractory material for filling gaps is arranged between adjacent insulation fiber boards, a spray coating layer for preventing thermal expansion and contraction is arranged on the end of the insulation fiber board away from the steel plate main body, and a plurality of anchors for fixing the insulation fiber boards are arranged on the steel plate main body.

[0007] Since the commonly used heat insulation board is still in the form of a steel plate with a layer of refractory material laid on it or using the refractory material on site for temporary protection, there are two disadvantages: on the one hand, the high temperature environment in front of the furnace makes these temporary protection measures fail quickly, resulting in repeated operations and waste of materials; on the other hand, the safety factor is greatly reduced, which is not conducive to the safety of personnel operations; by adopting the above technical scheme, the heat insulation board is made, the steel plate body is made into a bent shape at both ends, and a number of anchors are welded to the inner end face of the steel plate body. The size of each heat insulation fiberboard is cut according to the actual situation on site, and the heat insulation fiberboards are laid in turn. The heat insulation fiberboard covers the entire steel plate body and is fixed by anchors, and then the gaps in the heat insulation fiberboard are filled with amorphous refractory materials. After the filling is completed, the spray coating is sprayed on the surface of the heat insulation fiberboard to complete the production of the heat insulation board. In the subsequent use process, the heat insulation fiberboard can be replaced one by one according to the usage of the heat insulation fiberboard on site, without the need to replace the heat insulation fiberboard. The refractory material of the whole plate can be knocked off and then sprayed, and the steel plate body can be reused as long as it does not deform; through the arrangement of the steel plate body, insulation fiberboard, amorphous refractory material, spray material layer and anchor, firstly, the steel plate body is designed to be bent at both ends, which enhances the overall stability of the insulation board and can better adapt to the complex environment in front of the blast furnace. Several insulation fiberboards are laid on the inner end surface of the steel plate body to form an effective insulation barrier, which effectively blocks the direct effect of the high temperature in front of the furnace on the steel plate body. Secondly, the filled amorphous refractory material further improves the insulation effect and prevents heat transfer. The spray material layer can effectively prevent the damage to the insulation fiberboard caused by thermal expansion and contraction. Finally, the design of the insulation board makes the insulation board have a long service life and is easy to maintain. Only the damaged insulation fiberboard needs to be replaced, and there is no need to dismantle and rebuild the entire insulation board, which greatly reduces the maintenance cost and time, improves the maintenance efficiency, and improves the safety of personnel operations.

[0008] Optionally, a plurality of the anchors are sequentially arranged on the inner end surface of the steel plate body, three anchors form a group, and each group of the anchors corresponds to a single thermal insulation fiberboard.

[0009] By adopting the above technical solution, three anchors form a group, and each group of anchors corresponds to a single insulating fiberboard; through the setting of the anchors, the main function of the anchors is to fix the insulating fiberboard to ensure that it will not fall off or shift in a high temperature environment, thereby ensuring the stability and reliability of the insulating fiberboard. At the same time, in the harsh environment in front of the blast furnace, the insulating fiberboard will be subjected to various stresses, and the anchors can transfer and disperse these stresses to the steel plate body, thereby reducing the direct pressure on the insulating fiberboard and preventing it from being damaged due to stress concentration.

[0010] Optionally, the steel plate body includes a main board and two side boards, the two side boards are symmetrically connected to the two sides of the main board, each of the side boards is bent and arranged on the side wall of the main board, and the angle formed between the side boards and the main board is an obtuse angle.

[0011] By adopting the above technical scheme, the steel plate body includes a main board and two side boards, and the two side boards are welded and fixed on both sides of the main board to form the steel plate body; through the arrangement of the main board and the two side boards, the main board, as the main part of the heat insulation board, undertakes the main support and heat insulation functions, and the two side boards are fixed on both sides of the main board by welding to form a stable overall structure, which enhances the overall stability and deformation resistance of the steel plate body. At the same time, the two side boards are bent and arranged on the side walls of the main board to form an obtuse angle with the main board, which increases the contact area between the heat insulation board and the high-temperature furnace gas, which helps to further improve the heat insulation effect.

[0012] Optionally, the thickness range of the main board and the side board is 15mm-25mm, and the thickness of the main board and the side board is the same, the thickness range of the thermal insulation fiberboard is 25mm-35mm, and the thickness range of the spray paint layer is 10mm-20mm.

[0013] By adopting the above technical solution, through the setting of the thickness of the main board, side panel, insulation fiber board and spray coating layer, reasonable thickness setting can optimize the use of materials and reduce production costs while ensuring the performance of the insulation board, which not only meets the use requirements of the insulation board, but also complies with the principle of economy, bringing actual economic benefits to the enterprise.

[0014] Optionally, two lifting ears for lifting are provided on the top of the mainboard, and the two lifting ears are symmetrically arranged on the mainboard.

[0015] By adopting the above technical solution, the lifting lugs are welded and fixed on the top of the main board; through the setting of the lifting lugs, the main function of the lifting lugs is to facilitate the lifting and transportation of the insulation board. In the operation in front of the blast furnace, the insulation board usually needs to be frequently moved and installed. Through the lifting lugs, lifting equipment such as cranes or forklifts can be used to easily lift and transport the insulation board, which greatly improves work efficiency and ensures lifting safety.

[0016] Optionally, a base is provided at the bottom of the steel plate body, and the steel plate body is connected to the upper surface of the base.

[0017] By adopting the above technical solution, the steel plate body is welded to the base; through the setting of the base, the overall stability of the insulation board can be enhanced, so that it can maintain a stable working state in a high temperature environment, which helps to reduce deformation and damage caused by high temperature and improve the safety and reliability of the insulation board.

[0018] Optionally, a plurality of through holes for bolt fixing are formed through the base, and the plurality of through holes are arranged at equal distances along the length direction of the base.

[0019] By adopting the above technical solution, a number of through holes are opened through the base; through the setting of the through holes, the design of the through holes makes the installation process simple and convenient, and the installer can quickly fix the insulation board at the specified position, which is convenient for installation and simplifies the installation process.

[0020] Optionally, a plurality of reinforcing ribs for supporting the structure are provided on the base, and the plurality of reinforcing ribs are arranged along the length direction of the base, and each of the reinforcing ribs is arranged between two adjacent through holes, one end of the reinforcing rib plate is connected to the base, and the other end of the reinforcing rib plate is connected to the outer end surface of the steel plate body.

[0021] By adopting the above technical solution, the reinforcing rib plate is welded and fixed between the base and the steel plate body; through the setting of the reinforcing rib plate, the supporting strength of the base to the steel plate body is effectively enhanced, reducing the risk of deformation or damage caused by weight or external force. At the same time, the reinforcing rib plate can help disperse stress and load, reduce the pressure concentrated on the base or the steel plate body, thereby improving the bearing capacity and stability of the insulation board and extending its service life.

[0022] In summary, the present application includes at least one of the following beneficial technical effects:

[0023] Through the arrangement of the steel plate body, the heat-insulating fiberboard, the amorphous refractory material, the spray coating layer and the anchoring pieces, firstly, the steel plate body is designed to be bent at both ends, which enhances the overall stability of the heat-insulating board and can better adapt to the complex environment in front of the blast furnace. A number of heat-insulating fiberboards are laid on the inner end surface of the steel plate body to form an effective heat-insulating barrier, which effectively blocks the direct effect of the high temperature in front of the furnace on the steel plate body. Secondly, the filled amorphous refractory material further improves the heat-insulating effect and prevents heat transfer. The spray coating layer can effectively prevent the damage to the heat-insulating fiberboard caused by thermal expansion and contraction. Finally, the design of the heat-insulating board makes the heat-insulating board have a long service life and is easy to maintain. It only needs to replace the damaged heat-insulating fiberboard, and there is no need to dismantle and rebuild the entire heat-insulating board, which greatly reduces the maintenance cost and time, improves the maintenance efficiency, and improves the safety of personnel operations.

[0024] Through the arrangement of the main board and the two side boards, the main board, as the main part of the heat insulation board, bears the main support and heat insulation functions, and the two side boards are fixed on both sides of the main board by welding to form a stable overall structure, which enhances the overall stability and anti-deformation ability of the steel plate body. At the same time, the two side boards are bent and arranged on the side wall of the main board to form an obtuse angle with the main board, which increases the contact area between the heat insulation board and the high-temperature furnace gas, which helps to further improve the heat insulation effect;

[0025] By setting up the reinforcing ribs, the supporting strength of the base to the steel plate body is effectively enhanced, reducing the risk of deformation or damage caused by weight or external forces. At the same time, the reinforcing ribs can help disperse stress and load, reduce the pressure concentrated on the base or the steel plate body, thereby improving the load-bearing capacity and stability of the insulation board and extending its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic structural diagram of a blast furnace front heat insulation board that is easy to maintain in an embodiment of the present application.

[0027] Figure 2 It is a schematic diagram of the structure of the anchoring piece in the embodiment of the present application.

[0028] Figure 3 It is a structural schematic diagram of the installation relationship between the thermal insulation fiberboard and the amorphous refractory material in the embodiment of the present application.

[0029] Explanation of the reference numerals: 1. Steel plate body; 11. Main plate; 12. Side plate; 2. Thermal insulation fiberboard; 3. Amorphous refractory material; 4. Spray coating layer; 6. Anchor; 7. Lifting ear; 8. Base; 81. Through hole; 9. Reinforcing rib plate. DETAILED DESCRIPTION

[0030] The following is combined with Figure 1-3 This application is described in further detail.

[0031] The present application embodiment discloses a blast furnace front heat insulation board which is easy to maintain. Figure 1 The blast furnace front heat insulation board which is easy to maintain includes a steel plate body 1, and the steel plate body 1 includes a main board 11 and two side boards 12, and the two side boards 12 are respectively welded and fixed on both sides of the main board 11; the two side boards 12 are bent and installed on the two side walls of the main board 11, and the angle formed between each side board 12 and the main board 11 is an obtuse angle. The steel plate body 1 formed in this embodiment is a concave structure, and the thickness of the main board 11 and the side board 12 is the same. The thickness range of the main board 11 and the side board 12 is 15mm-25mm, and the preferred thickness is 20mm. The main board 11, as the main body of the heat insulation board, bears the main support and heat insulation functions, and the two side boards 12 are fixed on both sides of the main board 11 by welding to form a stable overall structure, which enhances the overall stability and deformation resistance of the steel plate body 1, and at the same time, the two side boards 12 are bent and arranged on the side walls of the main board 11 to form an obtuse angle with the main board 11, which increases the contact area between the heat insulation board and the high-temperature furnace gas, which helps to further improve the heat insulation effect.

[0032] Reference Figure 1Two lifting ears 7 are welded and fixed on the top of the main board 11. The two lifting ears 7 are symmetrically installed on the top of the main board 11. The main function of the lifting ears 7 is to facilitate the lifting and transportation of the insulation board. In the operation in front of the blast furnace, the insulation board usually needs to be frequently moved and installed. Through the lifting ears 7, lifting equipment such as a crane or a forklift can be used to easily lift and transport the insulation board, which greatly improves the work efficiency and ensures the lifting safety.

[0033] Reference Figure 1 A base 8 is welded and fixed to the bottom of the steel plate body 1, and the steel plate body 1 is installed on the upper surface of the base 8. A plurality of through holes 81 are penetrated through the base 8, and the plurality of through holes 81 are arranged in sequence along the length direction of the base 8. In this embodiment, the through holes 81 can be used for bolt installation. The base 8 can enhance the overall stability of the heat insulation board, so that it can maintain a stable working state in a high temperature environment, help reduce deformation and damage caused by high temperature, and improve the safety and reliability of the heat insulation board.

[0034] Reference Figure 1 A plurality of reinforcing ribs 9 are welded and fixed on the base 8, and the plurality of reinforcing ribs 9 are sequentially installed along the length direction of the base 8. In the present embodiment, each reinforcing rib 9 is arranged between two adjacent through holes 81, and the reinforcing rib 9 is in a triangular structure. One end of the reinforcing rib 9 is welded and fixed on the base 8, and the other end of the reinforcing rib 9 is welded and fixed on the outer end surface of the steel plate body 1. The thickness of the reinforcing rib 9 is 10 mm, which is used to effectively enhance the supporting strength of the base 8 to the steel plate body 1, and reduce the risk of deformation or damage caused by weight or external forces. At the same time, the reinforcing rib 9 can help disperse stress and load, reduce the pressure concentrated on the base 8 or the steel plate body 1, thereby improving the bearing capacity and stability of the insulation board and extending its service life.

[0035] Reference Figure 2 and Figure 3 A plurality of heat-insulating fiberboards 2 are installed on the inner end surface of the steel plate main body 1. The plurality of heat-insulating fiberboards 2 are sequentially spliced ​​on the inner end surface of the steel plate main body 1. In this embodiment, the heat-insulating fiberboards 2 are made of high-aluminum material containing zirconium. The size of each heat-insulating fiberboard 2 is cut according to the actual situation on site. The thickness range of the heat-insulating fiberboards 2 is 25mm-35mm, and the preferred thickness is 30mm. The plurality of heat-insulating fiberboards 2 form an effective heat-insulating barrier, which effectively blocks the direct effect of the high temperature in front of the furnace on the steel plate main body 1.

[0036] Reference Figure 2 and Figure 3 , amorphous refractory materials 3 are filled between adjacent insulation fiber boards 2. In this embodiment, the amorphous refractory materials 3 also have good high temperature resistance, can maintain a certain stability in a high temperature environment, extend the service life of the insulation board, further improve the insulation effect and prevent heat transfer.

[0037] Reference Figure 2 and Figure 3 A plurality of anchors 6 are welded and fixed on the steel plate body 1. Before welding the anchors 6, the inner side of the steel plate body 1 needs to be cleaned to ensure smoothness and rust-free. In this embodiment, the anchors 6 are used to fix the thermal insulation fiber board 2. The plurality of anchors 6 are sequentially installed on the inner end surface of the steel plate body 1. Three anchors 6 form a group, and each group of anchors 6 corresponds to a single thermal insulation fiber board 2. The anchors 6 can be made of 4.8 mm steel bars, and each section is 130 mm long. The main function of the anchors 6 is to fix the thermal insulation fiber board 2 to ensure that it will not fall off or shift in a high temperature environment, thereby ensuring the stability and reliability of the thermal insulation fiber board 2. At the same time, in the harsh environment in front of the blast furnace, the thermal insulation fiber board 2 will be subjected to various stresses. The anchors 6 can transfer and disperse these stresses to the steel plate body 1, reduce the direct pressure on the thermal insulation fiber board 2, and prevent it from being damaged due to stress concentration.

[0038] Reference Figure 2 and Figure 3 A spray coating layer 4 is sprayed on one end of the heat-insulating fiberboard 2 away from the steel plate body 1, and the thickness of the spray coating layer 4 is in the range of 10 mm to 20 mm. In this embodiment, the spray coating layer 4 can be a refractory material; the spray coating is mainly used to prevent the heat-insulating board from thermal expansion and contraction in a high temperature environment, thereby maintaining the stability and heat-insulating performance of the heat-insulating board, and can effectively prevent the heat-insulating board from being damaged due to thermal expansion and contraction, thereby improving the safety and reliability of the heat-insulating board.

[0039] The implementation principle of the heat insulation board for the blast furnace that is easy to maintain in the embodiment of the present application is as follows: when making the heat insulation board, the two side boards 12 are welded and fixed on both sides of the main board 11 to form a steel plate body 1, and a number of anchors 6 are welded to the inner end surface of the steel plate body 1. The size of each heat insulation fiber board 2 is cut according to the actual situation on site, and the heat insulation fiber boards 2 are laid in sequence. The heat insulation fiber boards 2 cover the entire steel plate body 1 and are fixed by the anchors 6. Then, the gaps of the heat insulation fiber boards 2 are filled with amorphous refractory materials 3. After the filling is completed, the spray coating is sprayed on the surface of the heat insulation fiber boards 2 to complete the production of the heat insulation board;

[0040] During the subsequent use, the damaged thermal insulation fiber boards 2 can be replaced one by one on site according to the use of the thermal insulation fiber boards 2. There is no need to knock down the refractory material of the entire board and then spray it. The steel plate main body 1 can be used repeatedly as long as it is not deformed. Through the arrangement of the steel plate main body 1, the thermal insulation fiber boards 2, the amorphous refractory material 3, the spray coating layer 4 and the anchor 6, firstly, the steel plate main body 1 is designed to be bent at both ends, which enhances the overall stability of the thermal insulation board and can better adapt to the complex environment in front of the blast furnace. A number of thermal insulation fiber boards 2 are laid on the inner end surface of the steel plate main body 1 to form an effective thermal insulation barrier, which effectively blocks the direct effect of the high temperature in front of the furnace on the steel plate main body 1. Secondly, the filled amorphous refractory material 3 further improves the thermal insulation effect and prevents heat transfer. The spray coating layer 4 can effectively prevent the damage to the thermal insulation fiber board 2 caused by thermal expansion and contraction. Finally, the design of the thermal insulation board makes the thermal insulation board have a long service life and is easy to maintain. Only the damaged thermal insulation fiber board 2 needs to be replaced, and there is no need to dismantle and rebuild the entire thermal insulation board, which greatly reduces the maintenance cost and time, improves the maintenance efficiency, and improves the safety of personnel operations.

[0041] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A blast furnace front heat insulation board that is easy to maintain, characterized in that: It comprises a steel plate body (1), the two ends of the steel plate body (1) are arranged in a bent shape, a plurality of heat-insulating fiberboards (2) are arranged on the inner end surface of the steel plate body (1), the plurality of heat-insulating fiberboards (2) are sequentially spliced ​​and arranged on the inner end surface of the steel plate body (1), an amorphous refractory material (3) for filling gaps is arranged between adjacent heat-insulating fiberboards (2), a spray coating layer (4) for preventing thermal expansion and contraction is arranged at one end of the heat-insulating fiberboard (2) away from the steel plate body (1), and a plurality of anchors (6) for fixing the heat-insulating fiberboards (2) are arranged on the steel plate body (1).

2. The heat insulation board for blast furnace that is easy to maintain according to claim 1 is characterized in that: A plurality of the anchors (6) are sequentially arranged on the inner end surface of the steel plate body (1), three of the anchors (6) form a group, and each group of the anchors (6) corresponds to a single thermal insulation fiberboard (2).

3. The heat insulation board for blast furnace that is easy to maintain according to claim 1 is characterized in that: The steel plate body (1) comprises a main plate (11) and two side plates (12), wherein the two side plates (12) are symmetrically connected to the two sides of the main plate (11), each of the side plates (12) is bent and arranged on the side wall of the main plate (11), and the angle formed between the side plates (12) and the main plate (11) is an obtuse angle.

4. The heat insulation board for blast furnace that is easy to maintain according to claim 3 is characterized in that: The thickness range of the main board (11) and the side board (12) is 15 mm-25 mm, and the thickness of the main board (11) and the side board (12) is the same, the thickness range of the thermal insulation fiber board (2) is 25 mm-35 mm, and the thickness range of the spray coating layer (4) is 10 mm-20 mm.

5. The heat insulation board for blast furnace that is easy to maintain according to claim 3 is characterized in that: Two lifting ears (7) for lifting are arranged on the top of the main board (11), and the two lifting ears (7) are symmetrically arranged on the main board (11).

6. The heat insulation board for blast furnace that is easy to maintain according to claim 1, characterized in that: A base (8) is provided at the bottom of the steel plate body (1), and the steel plate body (1) is connected to the upper surface of the base (8).

7. The heat insulation board for blast furnace that is easy to maintain according to claim 6 is characterized in that: The base (8) is provided with a plurality of through holes (81) for bolt fixing, and the plurality of through holes (81) are arranged at equal distances along the length direction of the base (8).

8. The heat insulation board for blast furnace that is easy to maintain according to claim 7, characterized in that: The base (8) is provided with a plurality of reinforcing rib plates (9) for supporting the structure. The plurality of reinforcing rib plates (9) are arranged along the length direction of the base (8). Each of the reinforcing rib plates (9) is arranged between two adjacent through holes (81). One end of the reinforcing rib plate (9) is connected to the base (8), and the other end of the reinforcing rib plate (9) is connected to the outer end surface of the steel plate body (1).

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