CN216273930U - Hot-blast furnace foundation structure - Google Patents
Hot-blast furnace foundation structure Download PDFInfo
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- CN216273930U CN216273930U CN202123053492.5U CN202123053492U CN216273930U CN 216273930 U CN216273930 U CN 216273930U CN 202123053492 U CN202123053492 U CN 202123053492U CN 216273930 U CN216273930 U CN 216273930U
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Abstract
The utility model provides a hot blast stove foundation structure, which relates to the technical field of hot blast stoves in metallurgical industry and comprises a concrete foundation body, wherein the top surface of the concrete foundation body is provided with a groove for mounting a stove shell of the hot blast stove, the bottom surface of the groove is sequentially paved with a foundation concrete layer, a heat insulation layer and a leveling layer from bottom to top, and the leveling layer is a sand-paving layer. The hot blast stove foundation structure provided by the utility model can effectively improve the installation precision of the hot blast stove.
Description
Technical Field
The utility model relates to the technical field of hot blast stoves in metallurgical industry, in particular to a hot blast stove foundation structure.
Background
The hot blast stove comprises a stove shell, a large amount of refractory brickwork arranged in the stove shell and various accessory equipment, and has considerable load. This requires that the stove must have a corresponding foundation which can withstand the full load of the stove and maintain its stability.
As shown in fig. 1, the hot blast stove foundation 1 is generally a block type reinforced concrete structure, and the structural form thereof is generally a structural design that bolts 3 are embedded in a reinforced concrete foundation 2 on the bottom surface and a secondary pouring layer 4 is added, and the secondary pouring layer is arranged on the bottom surface of the stove shell to ensure that the bottom surface of the stove shell of the hot blast stove reaches a designed elevation, thereby ensuring the levelness of the bottom surface of the stove shell.
However, in the above structural design, the area of the bottom plate of the furnace shell of the hot blast stove is large, the furnace shell is relatively soft, the levelness of the bottom plate of the furnace shell is difficult to adjust, the horizontal precision of the bottom plate of the furnace after installation is not high, and the bottom plate of the furnace shell is easy to damage due to internal force caused by uneven compression. In addition, the internal temperature of the hot blast stove during working is at least 1200 ℃, the heat-resistant temperature of common concrete is only 200 ℃, and further the secondary pouring layer needs to adopt heat-resistant concrete, so that the manufacturing cost is improved.
In view of the above, the present inventors designed a basic structure of a hot blast stove through repeated experiments according to production design experiences in the field and related fields for many years, so as to solve the problems in the prior art.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a hot blast stove foundation structure which can effectively improve the installation precision of the hot blast stove and has a good heat insulation effect.
In order to achieve the purpose, the utility model provides a hot blast stove foundation structure which comprises a concrete foundation body, wherein a groove for installing a hot blast stove shell is formed in the top surface of the concrete foundation body, a foundation concrete layer, a heat insulation layer and a leveling layer are sequentially paved on the bottom surface of the groove from bottom to top, and the leveling layer is a sand-paving layer.
The hot blast stove foundation structure comprises a sand layer and a hot blast stove foundation structure, wherein the sand layer is a sand layer treated by pressure grouting.
The hot blast stove infrastructure as described above, wherein the thickness of the sanding layer is 23 mm.
The hot blast stove foundation structure comprises a heat insulation layer and a brick paving layer, wherein the heat insulation layer comprises a fire-resistant spray coating layer and the brick paving layer is arranged above the fire-resistant spray coating layer.
The basic structure of the hot blast stove comprises a brick laying layer and a brick laying layer, wherein the brick laying layer is formed by splicing and laying a plurality of clay bricks.
The hot blast stove infrastructure as described above, wherein the thickness of the fire-resistant paint spray is 60 mm.
The hot blast stove foundation structure comprises a base concrete layer, a reinforcing mesh and a steel bar net.
The basic structure of the hot blast stove comprises a steel bar mesh, a steel bar mesh and a steel bar net.
The hot blast stove foundation structure comprises a concrete foundation body, wherein a plurality of bolts are embedded in the top surface of the concrete foundation body, the bolts surround the grooves, and the bolts are used for fixing the stove shell.
The hot blast stove foundation structure is characterized in that a secondary pouring layer is further arranged on the top surface of the concrete foundation body, and the secondary pouring layer is laid above the bolts and surrounds the grooves.
According to the basic structure of the hot blast stove, after the stove shell is installed, a non-cement-foam sealing layer is further arranged at the junction of the secondary pouring layer and the stove shell.
Compared with the prior art, the utility model has the following characteristics and advantages:
according to the hot blast stove foundation structure, the leveling layer comprises the sand paving layer, and the sand paving layer can be used for mounting and leveling the stove shell of the hot blast stove, so that the flatness of the bottom surface of the stove shell is ensured, and the horizontal precision of the stove shell of the hot blast stove is effectively improved; simultaneously, the sand layer can also directly support the load of steel construction stove outer covering bottom plate transmission, improves hot-blast furnace foundation structure's closely knit nature and compressive strength.
The top surface of the hot blast stove foundation structure provided by the utility model does not need to adopt heat-resistant concrete, and can meet the requirements by using common concrete, so that the manufacturing cost is saved, and the process size is not occupied.
Drawings
The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes, the proportional sizes, and the like of the respective members in the drawings are merely schematic for facilitating the understanding of the present invention, and do not specifically limit the shapes, the proportional sizes, and the like of the respective members of the present invention. Those skilled in the art, having the benefit of the teachings of this invention, may choose from the various possible shapes and proportional sizes to implement the utility model as a matter of case.
FIG. 1 is a schematic structural view of a hot blast stove foundation of the prior art;
FIG. 2 is a top plan view of the concrete foundation body of the present invention;
FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;
FIG. 4 is an enlarged partial view of the basic structure of the hot blast stove proposed by the present invention;
FIG. 5 is a schematic view showing the construction of the short pipe according to the present invention.
Description of reference numerals:
100. a hot blast stove base structure; 10. A concrete foundation body;
11. a top surface; 12. A groove;
20. a base concrete layer; 30. A thermal insulation layer;
31. a flame-retardant paint spraying layer; 32. Paving a brick layer;
40. leveling layer; 41. Paving a sand layer;
50. no water bubble mud;
60. a bolt; 70. Secondary irrigation layer;
200. a furnace shell; 400. A short pipe;
1. a hot blast stove foundation; 2. A reinforced concrete foundation;
3. a bolt; 4. And (5) secondary pouring of the layer.
Detailed Description
The details of the present invention can be more clearly understood in conjunction with the accompanying drawings and the description of the embodiments of the present invention. However, the specific embodiments of the present invention described herein are for the purpose of illustration only and are not to be construed as limiting the utility model in any way. Any possible variations based on the present invention may be conceived by the skilled person in the light of the teachings of the present invention, and these should be considered to fall within the scope of the present invention.
As shown in fig. 2 to 5, the present invention provides a hot blast stove foundation structure 100, the hot blast stove foundation structure 100 includes a concrete foundation body 10, a groove 12 for installing a hot blast stove shell 200 is disposed on a top surface 11 of the concrete foundation body 10, a base concrete layer 20, a thermal insulation layer 30 and a leveling layer 40 are sequentially laid on a bottom surface of the groove 12 from bottom to top, and the leveling layer 40 is a sand layer 41.
According to the hot blast stove foundation structure 100 provided by the utility model, the leveling layer 40 adopts the sand paving layer 41, and the sand paving layer 41 can be used for mounting and leveling the stove shell 200 of the hot blast stove, so that the flatness of the bottom surface of the stove shell 200 is ensured, and the horizontal precision of the stove shell 200 of the hot blast stove is effectively improved; meanwhile, the sand layer 41 can also directly support the load transmitted by the bottom plate of the steel-structure furnace shell, so that the compactness and the compressive strength of the basic structure 100 of the hot blast stove are improved.
The top surface of the hot blast stove base structure 100 provided by the utility model does not need to adopt heat-resistant concrete, and can meet the requirements by using common concrete, so that the manufacturing cost is saved, and the process size is not occupied.
In an alternative embodiment of the utility model, the sand layer 41 is a pressure grouted sand layer. Pressure grouting is a construction process, specifically, after the sand layer 41 is leveled by sand paving, the pressure grouting is poured into the groove 12 through the opening on the bottom plate of the furnace shell, and the slurry is poured into the gap of the bottom plate of the furnace shell, so that the sand layer 41 below the furnace shell 200 can be hardened, the gap between gravels is filled, and the compactness of the sand layer 41 is ensured. In an alternative example of this embodiment, the thickness of the sanding layer 41 is 23 mm.
In an alternative embodiment of the utility model, the insulating layer 30 comprises a flame-resistant paint spray layer 31 and a layer of bricks 32 provided above the flame-resistant paint spray layer 31. By adopting the structure, the heat insulation layer 30 is provided with the fire-resistant spray coating layer 31 and the brick laying layer 32, so that the heat insulation effect of the heat insulation layer 30 is further improved.
In an alternative example of this embodiment, the course of bricks 32 is formed from a plurality of clay bricks.
In an alternative example, the clay brick has a gauge of 230 × 150 × 75(mm), which serves as thermal insulation.
In an alternative example of this embodiment, the thickness of the refractory spray coating layer 31 is 60 mm.
In an alternative example, the refractory spray coating 31 is made of the refractory spray coating FN-130.
In another alternative example, the refractory spray material FN-140 may be used as the refractory spray material 31.
In an alternative example of this embodiment, the refractory spray layer 31 is a pressure grouted refractory spray layer and the brick layer 32 is a pressure grouted brick layer.
In an alternative example, the sand layer 41, the refractory spray coating layer 31 and the brick layer 32 are formed by the same pressure grouting treatment step, the slurry is poured into the gap of the bottom plate of the furnace shell, so that the sand layer 41 is hardened, the gap between clay bricks is filled, and the sand layer 41, the refractory spray coating layer 31 and the brick layer 32 can be wrapped by the slurry to form a whole, thereby further improving the compactness and the strength of the basic structure 100 of the hot blast stove.
In an alternative embodiment of the utility model, a reinforcing mesh is provided within the base concrete layer 20.
In an alternative example of this embodiment, the mesh reinforcement is a bi-directional double layer mesh reinforcement.
In an alternative example, the thickness and the reinforcement of the mesh reinforcement are determined by calculation.
In an alternative embodiment of the present invention, a plurality of bolts 60 are embedded on the top surface 11 of the concrete foundation body 10, and the plurality of bolts 60 are arranged around the groove 12. With the above structure, each bolt 60 is used for mounting the shell 200 of the hot blast stove.
In an alternative example of this embodiment, a secondary pouring layer 70 is further provided on the top surface 11 of the concrete foundation body 10, and the secondary pouring layer 70 is laid over the plurality of bolts 60 and surrounds the groove 12.
In an alternative embodiment, the thickness of the secondary potting layer 70 is 50 mm.
In an alternative embodiment, after the furnace shell 200 is installed, the interface between the secondary pouring layer 70 and the furnace shell 200 is further provided with a cement-free plugging layer 50. The non-foam cement blocking layer 50 can prevent the gaps between the steam furnace shell 200 and the secondary pouring layer 70 and the sand layer 41 from corroding the furnace shell 200.
Referring to fig. 2 to 5, the construction method and requirements of the basic structure 100 of the hot blast stove according to the present invention will be described in detail with reference to an embodiment:
1. after the lower reinforced concrete foundation body 10 is demoulded, processing a plurality of battens with the height of 60mm, properly arranging the battens on the foundation surface of the groove 12, adjusting the elevation of the upper surface of each batten to the designed elevation, taking out the battens, and filling and scraping the battens by using the spraying material FN130 with the same thickness to form the fire-resistant spraying coating layer 31.
2. Laying the 230 multiplied by 150 multiplied by 75(mm) clay bricks, selecting the bricks with the same thickness tolerance to lay flat, setting the brick gaps between the bricks and the castable to be 2mm, and leveling after laying, thereby forming a brick laying layer 32.
3. Sanding to form a sanding layer 41, which may be implemented in one of the following two ways:
1) when dry sand (fine sand is dried), the sand is spread to a thickness of 23mm and carefully screeded.
2) When general sand (fine sand without drying) is used, a plurality of battens with the height of 23mm are firstly processed and properly arranged on the clay brick, the upper surfaces of the battens are adjusted to the designed elevation and then paved with sand, the battens are strickled off according to the standard of the battens, then the battens are taken out, and the space occupied by the raw battens is filled with the sand.
4. A bottom furnace shell 200 (bottom steel shell) of the hot blast furnace is installed,
1) when dry sand is used, the furnace shell 200 is hoisted to the concrete foundation body 10, foundation bolts are used, the furnace shell is lowered while being aligned until the furnace shell is placed on the sand-paving layer 41, and the hoisted steel ropes are loosened; checking whether the furnace shell 200 is inclined (whether the elevation of the top end is consistent); if the furnace shell 200 (bottom steel shell) is not inclined, the furnace shell 200 (bottom steel shell) is lifted, the contact area between the surface of the sand layer 41 and the bottom surface of the furnace shell 200 (bottom steel shell) is visually observed, if the contact area is more than or equal to 60 percent, the bottom steel shell is placed in the original position, and the periphery of the bottom steel shell is blocked by the blister-free cement 50. If the content of the non-contact part is less than 60%, the non-contact part needs to be filled with sand and scraped, after the procedure is repeated until the content is more than or equal to 60%, the steel shell is put in place, and the periphery is plugged with the anhydrous blister mud 50.
2) When general fine sand is used, the bottom steel shell is hoisted and transported to the concrete foundation body 10, and is placed on the sand-paving layer 41 while being lowered and aligned; and then, one person enters the furnace shell 200, moves everywhere, and can plug the periphery without blister mud without shaking to wait for grouting.
5. Grouting the slurry to form a slurry,
1) before grouting, aligning the processed grouting short pipes 400 (one hole is aligned with one pipe) and welding the grouting short pipes on the bottom plate of the furnace shell 200 (please pay attention to the bottom plate of the furnace grate strut when the position of the grouting hole is selected); the concrete structure of the short pipe 400 is shown in fig. 5 and is finally determined by a construction unit; after the short pipe is welded, a wooden wedge is plugged.
2) At least after 7 and 8 sections of the shell 200 of the hot blast stove are installed, pressure grouting is carried out.
3) The components of the slurry used for grouting are as follows: 75 percent of refractory mortar and 25 percent of 500-grade aluminum silicate cement, and the water-cement ratio is determined by field tests.
4) Grouting requirements: a hot-blast stove is continuously arranged according to the arrangement sequence of grouting holes, long-time interruption (preferably no more than 5 minutes) is avoided midway, and the stirred slurry is completely grouted within 30 minutes.
5) The change of the steel plate near the grouting hole is measured at any time during grouting, when the steel plate rises by 2mm, grouting of the hole is stopped, the hose is taken down, and the wooden wedge is plugged (the same below).
6) And when the grout is discharged from the adjacent grouting holes, stopping grouting and replacing the holes.
7) When the outlet pressure of the grouting pump reaches 0.6MPa, stopping the pump to check whether other reasons (such as pipeline blockage) exist, and stopping the pump to change the hole if no other reasons exist.
8) When the pressure at the grouting hole rises to 0.4MPa, the pump is stopped and replaced.
9) When all grouting holes of a hot blast stove are filled, a comprehensive inspection is carried out, the bottom plate is sequentially knocked by a small hammer, if the sound of 'blowing out' is found, then detailed inspection is carried out on the periphery of the bottom plate, the 'blowing out' range is marked out, and when the area of the bottom plate is more than or equal to 2m2, holes are opened in the range for filling.
6. And cutting off all short pipes after all grouting is qualified. And flattening the steel plate around the hole by using a grinding wheel, and welding a circular steel plate with the diameter being 30mm larger than that of the hole and the thickness being 25 mm. Please note the quality of the weld joint, avoiding causing hidden danger.
7. And after the 6 th item is finished and is qualified through inspection, the mounting of the grate support beam can be carried out. Pouring heat-resistant concrete at the bottom after the furnace grate supporting beam is installed and adjusted and empirically folded. If residues adhered to the grate holes and the top surfaces of the beams exist, the residues are cleaned in time. The pouring of the heat-resistant concrete at the bottom must be sufficiently compacted to ensure that the heat-resistant concrete is filled between the bottom surface of the support and the bottom plate of the hot blast furnace without gaps. Leveling the surface of the bricklaying part. And after the maintenance period is over, laying bricks on the hot blast stove according to the drawing and the brick laying rules.
The present invention is not limited to the above embodiments, and in particular, various features described in different embodiments can be arbitrarily combined with each other to form other embodiments, and the features are understood to be applicable to any embodiment except the explicitly opposite descriptions, and are not limited to the described embodiments.
Claims (12)
1. The utility model provides a hot-blast furnace foundation structure, its characterized in that, hot-blast furnace foundation structure includes concrete foundation body, concrete foundation body's top surface is equipped with the recess that is used for installing the stove outer covering of hot-blast furnace, basic concrete layer, insulating layer and screed-coat have been laid by supreme down in proper order to the bottom surface of recess, the screed-coat adopts the sanding layer.
2. The hot blast stove infrastructure of claim 1, wherein the layer of sand is a layer of sand treated by pressure grouting.
3. The stove infrastructure of claim 2, wherein the layer of sanding has a thickness of 23 mm.
4. The hot blast stove infrastructure of claim 1, wherein the insulation layer comprises a fire resistant paint spray layer and a brick layer disposed over the fire resistant paint spray layer.
5. The hot blast stove infrastructure of claim 4, wherein the fire resistant spray paint layer is a pressure grouted fire resistant spray paint layer and the brick laying layer is a pressure grouted brick laying layer.
6. The hot blast stove infrastructure of claim 4, wherein the brick layer is made of a plurality of clay bricks.
7. The stove infrastructure of claim 4, wherein the thickness of the fire resistant paint spray is 60 mm.
8. A hot blast stove infrastructure as claimed in claim 1, wherein a mesh reinforcement is provided within the base concrete layer.
9. The stove infrastructure of claim 8, wherein the mesh reinforcement is a bi-directional double layer mesh reinforcement.
10. The hot blast stove foundation structure according to any one of claims 1 to 9, wherein a plurality of bolts are embedded in the top surface of the concrete foundation body, the plurality of bolts being disposed around the groove, the bolts being used for fixing the shell.
11. A hot blast stove infrastructure as claimed in claim 10, wherein a secondary poured layer is provided on the top surface of the concrete foundation body, the secondary poured layer being laid over the plurality of bolts and around the groove.
12. The stove infrastructure of claim 11, wherein an anhydrous blister cement plugging layer is provided at the interface of the secondary potting layer and the shell after the shell is installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123053492.5U CN216273930U (en) | 2021-12-07 | 2021-12-07 | Hot-blast furnace foundation structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123053492.5U CN216273930U (en) | 2021-12-07 | 2021-12-07 | Hot-blast furnace foundation structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216273930U true CN216273930U (en) | 2022-04-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123053492.5U Active CN216273930U (en) | 2021-12-07 | 2021-12-07 | Hot-blast furnace foundation structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216273930U (en) |
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2021
- 2021-12-07 CN CN202123053492.5U patent/CN216273930U/en active Active
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