Basic interface processing method for integral transportation of blast furnace

Abstract

The invention provides a blast furnace integral transportation foundation interface processing method which comprises the following steps: a jig frame construction step: assembling a jig frame on one side of an original blast furnace, and constructing a coil base on the top of the jig frame; an underground foundation construction step: arranging an underground foundation under the ground of the original blast furnace position; a transportation step: transporting the jig frame to an original blast furnace position, and connecting the jig frame with an underground foundation; and a pouring step, specifically, concrete is poured into the jig frame. According to the method, the jig frame and the coil base are constructed on one side of the original blast furnace position, after the underground foundation is constructed on the original blast furnace position, only the jig frame and the coil base need to be transported to the original blast furnace position, operation efficiency is improved, then concrete is poured into the jig frame, and the coil base and the underground foundation are stably connected together; the joint stability between the blast furnace and the underground foundation is ensured, the overall strength and stability of the blast furnace are improved, the method is easy to operate, safe and reliable, the construction speed is increased, and the construction period is shortened.

Description

Technical Field

[0001] This invention relates to the field of metallurgical engineering technology, and more specifically, to a basic interface processing method for the overall transportation of blast furnaces. Background Technology

[0002] The blast furnace unit is the most core and representative process in metallurgical engineering, and also the unit with the longest construction cycle and the most complex construction. There are approximately 1,400 blast furnaces nationwide, with small and medium-sized blast furnaces accounting for about 80% of the national blast furnace market. The lifespan of a generation of small and medium-sized blast furnaces in my country is roughly 8-12 years. As the service life of blast furnaces increases, equipment aging, performance degradation, and the need for technological upgrades often necessitate demolition and reconstruction on the same site. However, the existing blast furnace and the foundation location of the new blast furnace often interfere with each other, and starting construction of a new blast furnace after demolishing the existing one cannot meet the owner's schedule requirements. Furthermore, the blast furnace body, furnace roof, tapping area, hot blast stove, gravity dust removal, dry dust removal, and auxiliary systems are highly concentrated, and the site is compact, requiring multi-level cross-operations during construction, resulting in low work efficiency. Summary of the Invention

[0003] In view of this, the present invention proposes a basic interface processing method for the overall transportation of blast furnaces, which aims to solve the problem of long construction period and low efficiency caused by the demolition of the original blast furnace and the construction of a new blast furnace in the prior art.

[0004] This invention proposes a basic interface treatment method for the overall transportation of a blast furnace. The method includes the following steps: a jig construction step, in which a jig is assembled on one side of the original blast furnace, and a furnace platform foundation is constructed on the top of the jig; an underground foundation construction step, in which an underground foundation is set up at the original blast furnace location; a transportation step, in which the jig is transported to the original blast furnace location and the jig is connected to the underground foundation; and a pouring step, in which concrete is poured into the jig.

[0005] Furthermore, in the above-mentioned basic interface treatment method for the overall transportation of the blast furnace, the jig construction step includes: a bracket and multiple support columns; wherein, each support column is spaced apart at the bottom of the bracket.

[0006] Furthermore, in the above-mentioned basic interface treatment method for the overall transportation of the blast furnace, in the jig construction step, according to the outer dimensions of the furnace platform and the cross center line of the bracket, a circular steel plate is installed on the top of the bracket, and multiple anchoring nails are welded on the top and bottom of the circular steel plate to form a steel bottom mold; the center line of the jig is transferred to the steel bottom mold as a reference line, and the furnace platform foundation is constructed according to the reference line.

[0007] Furthermore, in the above-mentioned basic interface treatment method for the overall transportation of the blast furnace, in the underground foundation construction step, concrete is poured underground at the original blast furnace location, and multiple embedded parts are set according to the position of each support column in the frame.

[0008] Furthermore, in the above-mentioned basic interface treatment method for the overall transportation of the blast furnace, during the transportation steps, each support column and each embedded part are welded together in a corresponding manner.

[0009] Furthermore, in the above-mentioned method for treating the basic interface of the blast furnace overall transportation, the pouring step further includes: a dismantling sub-step, in which the part of the jig placed outside the furnace platform foundation is dismantled; a treatment sub-step, in which the top surface of the underground foundation within the range of the furnace platform foundation is treated; an installation sub-step, in which a grouting pipe is installed near the top of the jig; and a concrete pouring sub-step, in which concrete is poured into the jig using the grouting pipe.

[0010] Furthermore, in the above-mentioned basic interface treatment method for the overall transportation of the blast furnace, in the processing sub-step, the top surface of the underground foundation is roughened within the range of the furnace platform foundation, and holes are drilled and rebars are installed on the underground foundation. Each rebar is placed at a preset height above the top surface of the underground foundation, and the rebars are arranged in a quincunx pattern.

[0011] Furthermore, in the above-mentioned basic interface treatment method for the overall transportation of the blast furnace, in the installation sub-step, the jig is divided into multiple compartments on an equal basis, and at least one grouting pipe is pre-embedded at the first preset elevation of each compartment, with one end of each grouting pipe extending to the center of the jig; multiple vent holes are set at the second preset elevation of each compartment, and an vent pipe is set at each vent hole, with each vent pipe connected to the compartment.

[0012] Furthermore, in the above-mentioned basic interface processing method for the overall transportation of the blast furnace, the exhaust pipe has a preset tilt angle.

[0013] Furthermore, in the above-mentioned method for treating the basic interface of the blast furnace overall transportation, in the concrete pouring sub-step, the concrete is poured in two stages along the height direction of the jig. Non-shrink concrete is used from the top surface of the underground foundation to the first preset height of the jig, and high-strength grouting material is used from the first preset height of the jig to the top of the jig.

[0014] In this invention, a jig is assembled on one side of the existing blast furnace, and a furnace platform foundation is constructed on top of the jig. An underground foundation is then set up below the original blast furnace location. The jig is then transported to the original blast furnace location and connected to the underground foundation. Finally, concrete is poured into the jig. In this way, the jig and furnace platform foundation are constructed on one side of the original blast furnace location. After constructing the underground foundation at the original blast furnace location, it is only necessary to transport the jig and furnace platform foundation to the original blast furnace location. The locations of the original blast furnace and the newly built blast furnace will not interfere with each other, improving work efficiency. Pouring concrete into the jig ensures a stable connection between the furnace platform foundation and the underground foundation, ensuring a stable interface between the blast furnace and the underground foundation, thereby improving the overall strength and stability of the blast furnace. This method is simple to operate, safe and reliable, speeds up construction, shortens the construction period, and solves the problem of long construction period and low efficiency caused by demolishing the original blast furnace and then rebuilding it in the prior art. Attached Figure Description

[0015] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 A flowchart illustrating the basic interface processing method for the overall transportation of a blast furnace provided in this embodiment of the invention; Figure 2 A schematic diagram of the jig structure in the basic interface processing method for the overall transportation of a blast furnace provided in this embodiment of the invention; Figure 3 A schematic diagram of the underground foundation structure in the basic interface processing method for the overall transportation of blast furnace provided in this embodiment of the invention; Figure 4 A schematic diagram of the dismantling sub-step in the basic interface processing method for the overall transportation of a blast furnace provided in this embodiment of the invention; Figure 5 This is a structural diagram of the concrete pouring sub-step in the basic interface treatment method for the overall transportation of a blast furnace provided in an embodiment of the present invention. Detailed Implementation

[0016] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the disclosure to those skilled in the art. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0017] See Figure 1 , Figure 1 A flowchart illustrating the basic interface processing method for the overall transportation of a blast furnace provided in this embodiment of the invention. As shown in the figure, the basic interface processing method for the overall transportation of a blast furnace includes the following steps: Step S1 of the blast furnace frame construction: Assemble the frame on one side of the existing blast furnace and construct the furnace platform foundation on top of the frame.

[0018] Specifically, the blast furnace will be constructed in three sections: the first section is from +2.3m to 3.72m, the second section is below ±0m, and the third section, the connecting part, is from ±0m to +2.3m. The first section, from +2.3m to 3.72m, is the offline assembly section, where the jig 1 is assembled on one side of the existing blast furnace (see [reference]). Figure 2 The frame 1 includes a bracket 11 and a plurality of support columns 12. The support columns 12 are spaced apart at the bottom of the bracket 11.

[0019] See Figure 2 and Figure 5 After the jig 1 is assembled, its top elevation is +2.3m, which is also the top elevation of the bracket 11 and the bottom elevation of the furnace platform foundation 2. Based on the furnace platform's dimensions and the cross-shaped centerline of the bracket 11, a circular steel plate is installed on the top of the bracket 11, and multiple anchoring nails 3 are welded to the top and bottom of the circular steel plate to form a steel bottom mold. Specifically, the circular steel plate is welded to the top steel beam of the bracket 11. Furthermore, the circular steel plate and the anchoring nails 3 form the steel bottom mold, with the anchoring nails 3 arranged in a quincunx pattern.

[0020] In practice, the thickness of the circular steel plate can be t=20mm. The diameter of each anchor nail 3 can be 16mm, the length can be 150mm, and the spacing between two adjacent anchor nails 3 can be 500mm.

[0021] The centerline of the formwork 1 is transferred to the steel bottom formwork as a reference line, and the furnace platform foundation 2 is constructed according to the reference line. Specifically, the reinforcing bars are tied, the formwork is erected and poured according to the reference line to form the furnace platform foundation 2, and then the upper furnace shell is assembled.

[0022] Step S2 of the underground foundation construction involves setting up an underground foundation at the original blast furnace location.

[0023] Specifically, see Figure 3 Concrete was poured underground at the original blast furnace location, and multiple embedded parts were set according to the position of each support column in the frame. The number of embedded parts was the same as the number of support columns, and each embedded part corresponded to each support column.

[0024] The second section, below ±0m, is the foundation for the new blast furnace. After the old blast furnace is demolished, the foundation for the new blast furnace is constructed. In the area below ±0m, formwork is set up, steel bars are tied, and then concrete is poured to form the underground foundation 7.

[0025] The location of each embedded part is determined according to the location of each support column. The material of each embedded part can be Q355B, t=30mm.

[0026] In transportation step S3, the jig is transported to the original blast furnace location and connected to the underground foundation.

[0027] Specifically, see Figures 2 to 4 After the underground foundation 7 is completed, the frame 1 and the furnace platform foundation 2 above it are transported to the location of the underground foundation 7, and each support column 12 is welded to each embedded part in a corresponding manner.

[0028] S4: Pour concrete into the formwork.

[0029] Specifically, the third section, i.e. the connecting part, is constructed from ±0m to +2.3m by pouring concrete.

[0030] Pouring step S4 further includes: In sub-step S41, the portion of the jig placed outside the furnace foundation is removed.

[0031] Specifically, see Figure 4 Remove the portion of the jig 1 that is placed outside the furnace foundation 2 (e.g., Figure 4 (As shown in area A), retain the steel beams and support columns 12 under the furnace foundation 2.

[0032] Processing sub-step S42 involves processing the top surface of the underground foundation within the area of ​​the furnace platform foundation.

[0033] Specifically, see Figure 4 and Figure 5 Within the area of ​​the furnace foundation 2, the top surface of the underground foundation 7 is roughened, and holes are drilled and rebars 4 are installed on the underground foundation 7. Each rebar 4 is placed at a predetermined height above the top surface of the underground foundation 7, and the rebars 4 are arranged in a quincunx pattern.

[0034] In specific implementation, the area at ±0m within the furnace foundation 2 is roughened. After cleaning, holes are drilled at ±0m for rebar 4, with the rebar d=25@250mm. Part of each rebar 4 is placed within the underground foundation 7, while the other part protrudes above the ground. This preset height can be determined based on actual conditions; this embodiment does not impose any restrictions. In this embodiment, the preset height is h=200mm, meaning the other part of each rebar 4 protrudes 200mm above the ground.

[0035] Installation sub-step S43: Install the grouting pipe near the top of the jig.

[0036] Specifically, the jig is divided into multiple compartments. At least one grouting pipe is pre-embedded at the first preset elevation in each compartment, with one end of each pipe extending to the center of the jig. Multiple vents are set at the second preset elevation in each compartment, and an vent pipe is installed at each vent, with each vent pipe connected to the compartment. The second preset elevation is higher than the first preset elevation.

[0037] The exhaust pipe has a preset tilt angle, which can be determined according to the actual situation. This embodiment does not impose any restrictions on this.

[0038] In practice, the number of warehouses, the first preset elevation, and the second preset elevation can all be determined according to the actual situation, and this embodiment does not impose any restrictions on them.

[0039] In practice, the jig 1 is divided into 12 equal compartments. Two d=100mm steel pipes are pre-embedded at an elevation of +2.0m in each compartment, extending to the center of the furnace platform. The inner ends are sealed with tape. These two steel pipes are used as grout pumping pipes. At the highest point of +2.1m in each compartment, an exhaust vent with a d=50mm diameter is installed. The exhaust pipe is welded to the top of the compartment at a 45° angle, and the end is sealed with a ball valve.

[0040] In the concrete pouring sub-step S44, concrete is poured into the formwork using a grouting pipe.

[0041] Specifically, see Figure 5 For the third connecting section, which is ±0m to +2.3m, concrete is poured. When pouring the concrete, the total height of 2300mm is poured in two parts along the height direction of the formwork 1. The first pour is from the top surface of the underground foundation 7 to the first preset height of the formwork 1 using non-shrink concrete 5. Then the second pour is from the first preset height of the formwork 1 to the top of the formwork 1 using high-strength grout 6.

[0042] Preferably, the non-shrink concrete is C30 concrete, and the high-strength grout is BY40 castable.

[0043] In practice, the first preset height is 1100mm. The second preset height is 1200mm.

[0044] As can be seen, in this embodiment, a jig is assembled on one side of the existing blast furnace, and a furnace platform foundation is constructed on top of the jig. An underground foundation is set up below the original blast furnace location. The jig is then transported to the original blast furnace location and connected to the underground foundation. Finally, concrete is poured into the jig. In this way, the jig and furnace platform foundation are constructed on one side of the original blast furnace location. After constructing the underground foundation at the original blast furnace location, it is only necessary to transport the jig and furnace platform foundation to the original blast furnace location. The locations of the original blast furnace and the newly built blast furnace will not interfere with each other, improving work efficiency. Pouring concrete into the jig ensures a stable connection between the furnace platform foundation and the underground foundation, ensuring the stability of the interface between the blast furnace and the underground foundation, thereby improving the overall strength and stability of the blast furnace. This method is simple to operate, safe and reliable, speeds up construction, shortens the construction period, and solves the problem of long construction period and low efficiency caused by demolishing the original blast furnace and then rebuilding it in the prior art.

[0045] It should be noted that in the description of this invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc., which indicate the direction or positional relationship, are based on the direction or positional relationship shown in the drawings. This is only for the convenience of description and is not intended to indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this invention.

[0046] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0047] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A basic interface processing method for the overall transportation of a blast furnace, characterized in that, Includes the following steps: The construction steps for the blast furnace frame are as follows: assemble the frame on one side of the existing blast furnace, and construct the furnace platform foundation on top of the frame. The underground foundation construction steps involve setting up an underground foundation at the original blast furnace location; The transportation process involves transporting the jig to the original blast furnace location and connecting the jig to the underground foundation. The pouring step involves pouring concrete into the formwork.

2. The basic interface processing method for the overall transportation of a blast furnace according to claim 1, characterized in that, In the aforementioned frame construction steps The tire frame includes a bracket and a plurality of support columns; wherein each of the support columns is spaced apart at the bottom of the bracket.

3. The basic interface processing method for the overall transportation of a blast furnace according to claim 2, characterized in that, In the aforementioned frame construction steps Based on the external dimensions of the furnace platform and the cross center line of the bracket, a circular steel plate is installed on the top of the bracket, and multiple anchoring nails are welded to the top and bottom of the circular steel plate to form a steel bottom mold. The center line of the jig is transferred to the steel bottom mold as a reference line, and the furnace platform foundation is constructed according to the reference line.

4. The basic interface processing method for the overall transportation of a blast furnace according to claim 2, characterized in that, In the aforementioned underground foundation construction steps Concrete was poured underground at the original blast furnace location, and multiple embedded parts were installed according to the positions of each support column in the frame.

5. The basic interface processing method for the overall transportation of a blast furnace according to claim 4, characterized in that, In the aforementioned transportation steps Each of the aforementioned support columns is welded to each of the aforementioned embedded parts in a corresponding manner.

6. The basic interface processing method for the overall transportation of a blast furnace according to claim 1, characterized in that, The pouring step further includes: The dismantling sub-step involves removing the portion of the jig that is located outside the furnace platform foundation. The processing sub-step involves processing the top surface of the underground foundation within the area of ​​the furnace platform foundation; The installation sub-step involves installing a grouting pipe near the top of the jig. The concrete pouring sub-step involves pouring concrete into the formwork using the grouting pipe.

7. The basic interface processing method for the overall transportation of a blast furnace according to claim 6, characterized in that, In the processing sub-step Within the area of ​​the furnace platform foundation, the top surface of the underground foundation is roughened, and holes are drilled and rebars are installed on the underground foundation. Each of the installed rebars is placed at a predetermined height above the top surface of the underground foundation, and the rebars are arranged in a quincunx pattern.

8. The basic interface processing method for the overall transportation of a blast furnace according to claim 6, characterized in that, In the installation sub-step The frame is divided into multiple compartments, and at least one grouting pipe is pre-embedded at the first preset elevation of each compartment. One end of each grouting pipe extends to the center of the frame. Multiple vent holes are provided at the second preset elevation of each of the chambers, and an vent pipe is provided at each of the vent holes. Each vent pipe is connected to the chamber.

9. The basic interface processing method for the overall transportation of a blast furnace according to claim 8, characterized in that, The exhaust pipe has a preset tilt angle.

10. The basic interface processing method for the overall transportation of a blast furnace according to claim 6, characterized in that, In the concrete pouring sub-step When pouring concrete, it is poured in two stages along the height of the formwork. Non-shrink concrete is used from the top surface of the underground foundation to the first preset height of the formwork, and high-strength grout is used from the first preset height of the formwork to the top of the formwork.

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