CN110656213A - Blast furnace hot blast stove foundation air leakage repairing structure and construction method thereof - Google Patents
Blast furnace hot blast stove foundation air leakage repairing structure and construction method thereof Download PDFInfo
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- CN110656213A CN110656213A CN201911041780.3A CN201911041780A CN110656213A CN 110656213 A CN110656213 A CN 110656213A CN 201911041780 A CN201911041780 A CN 201911041780A CN 110656213 A CN110656213 A CN 110656213A
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- 238000010276 construction Methods 0.000 title claims abstract description 13
- 238000007789 sealing Methods 0.000 claims abstract description 9
- 230000003014 reinforcing effect Effects 0.000 claims description 14
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 13
- 229910000831 Steel Inorganic materials 0.000 claims description 8
- 238000005266 casting Methods 0.000 claims description 8
- 239000010959 steel Substances 0.000 claims description 8
- 238000003466 welding Methods 0.000 claims description 6
- 238000003825 pressing Methods 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 5
- 230000002262 irrigation Effects 0.000 description 4
- 238000003973 irrigation Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000000805 composite resin Substances 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 229910001208 Crucible steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004382 potting Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000010125 resin casting Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B9/00—Stoves for heating the blast in blast furnaces
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/44—Foundations for machines, engines or ordnance
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- General Life Sciences & Earth Sciences (AREA)
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- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Working Measures On Existing Buildindgs (AREA)
Abstract
The invention discloses a blast furnace hot blast stove air leakage repairing structure and a construction method thereof, wherein the blast furnace hot blast stove air leakage repairing structure comprises a vertical plate arranged around the outer wall of the blast furnace hot blast stove, and the vertical plate is positioned outside a bolt support horizontal plate of the blast furnace hot blast stove; the bottom of the vertical plate is fixedly arranged in a concrete bearing platform of the blast furnace hot blast stove; a cavity is formed by the vertical plate, the concrete bearing platform, the outer wall of the blast furnace hot blast stove and the bolt support horizontal plate; a second pouring layer formed by pouring is arranged in the cavity, and the second pouring layer realizes the sealing between the pouring layer of the blast furnace hot blast stove at the bottom of the blast furnace hot blast stove and the concrete bearing platform; according to the invention, the second pouring layer is poured on the periphery of the blast furnace hot blast stove, and a gap between the pouring layer of the blast furnace hot blast stove at the bottom of the blast furnace hot blast stove and the concrete bearing platform is sealed, so that hot air in the blast furnace hot blast stove is prevented from leaking, the stability of the air pressure in the blast furnace hot blast stove is ensured, normal high-temperature hot air is provided for the blast furnace, and the powerful guarantee is provided for the normal production of the blast furnace.
Description
[ technical field ] A method for producing a semiconductor device
The invention belongs to the technical field of maintenance of blast furnace hot blast stoves, and particularly relates to a blast furnace hot blast stove foundation air leakage repairing structure and a construction method thereof.
[ background of the invention ]
The blast furnace hot blast stove is one of main supporting equipment of iron works blast furnace, generally a blast furnace joins in marriage 3 ~ 4 hot-blast stoves, and the effect of hot-blast stove is for the blast furnace provides high temperature high pressure hot-blast, and hot-blast temperature generally is more than 1200 degrees, and the wind pressure is more than or equal to 400KPa continuously. The basic structure of the furnace bottom of a modern iron-making blast furnace hot blast furnace is complex, the furnace bottom is provided with two holes, a refractory brick wall with the thickness of 600-800 mm is built inside the circumference of a steel shell, a plurality of cast steel grate supporting columns are distributed at the bottom of the furnace bottom and bear hundreds of tons or even thousands of tons of weight, the weight of the built hot blast furnace is pressed down, the welding seam of a furnace foundation sealing plate or the welding seam of a sealing plate grouting hole protecting cap is cracked, the cracks and the hot blast furnace foundation refractory brickwork and the gaps of a pouring layer form an air leakage channel, and then the air leakage of the hot blast furnace foundation is.
The area leaks air, has great threat to the safety of the hot blast furnace process and equipment, and is difficult to continuously provide hot air for the blast furnace. In the prior art, a common treatment method is to empty a hot blast stove and dig and search and treat a leakage point at the inner bottom of the hot blast stove, but because the structure of a stove base of the hot blast stove is complex, when the leakage point is searched, all internal equipment needs to be dismantled and reinstalled, and the repair difficulty is high.
[ summary of the invention ]
The invention aims to provide a blast furnace hot blast stove foundation air leakage repairing structure and a construction method thereof, and aims to solve the problem that the blast furnace hot blast stove foundation air leakage repairing difficulty is high.
The invention adopts the following technical scheme: a blast furnace hot blast stove fire bed leaks out and restores structure includes:
the vertical plate is arranged around the outer wall of the blast furnace hot blast stove and is positioned outside the bolt support horizontal plate of the blast furnace hot blast stove;
the bottom of the vertical plate is fixedly arranged in a concrete bearing platform of the blast furnace hot blast stove;
a cavity is formed by the vertical plate, the concrete bearing platform, the outer wall of the blast furnace hot blast stove and the bolt support horizontal plate;
a second pouring layer formed by pouring is arranged in the cavity and used for realizing the sealing between the pouring layer of the blast furnace hot blast stove at the bottom of the blast furnace hot blast stove and the concrete bearing platform;
and a top cover plate is arranged above the second pouring layer and between the horizontal plate and the vertical plate of the bolt support.
Further, the top surface of the second pouring layer is lower than the bolt support horizontal plate.
Furthermore, a pouring groove is formed in the concrete bearing platform and connected with the vertical plate, and a first pouring layer is arranged in the pouring groove.
Furthermore, the device also comprises a pressure grouting layer, wherein the pressure grouting layer is positioned between the concrete bearing platform and the blast furnace hot blast stove grouting layer.
Furthermore, the bottom ends of the vertical plates are fixedly connected with the internal reinforcing steel bars of the bearing platform in the concrete bearing platform.
Furthermore, a reinforcing rib is connected between the vertical plate and the horizontal plate of the bolt support.
Further, the outside bottom of riser is provided with the third watering layer.
Further, the bottom surface of the pouring groove is positioned below the reinforcing steel bars inside the bearing platform.
The other technical scheme of the invention is as follows: a construction method for repairing a blast furnace hot blast stove foundation air leakage structure comprises the following steps:
pouring a pressure grouting layer between the concrete bearing platform and the blast furnace hot blast stove pouring layer;
digging a pouring groove on a concrete bearing platform around the outside of the blast furnace hot blast stove; wherein, the bottom surface of the pouring groove is positioned below the reinforcing steel bars in the bearing platform;
welding the bottom end of the vertical plate with a reinforcing steel bar inside the bearing platform, and casting a first pouring layer into the pouring groove;
a plurality of reinforcing ribs are connected between the vertical plate and a bolt support horizontal plate of the blast furnace hot blast stove;
pouring a second pouring layer into a cavity formed by the vertical plate, the concrete bearing platform, the outer wall of the blast furnace hot blast stove and the bolt support horizontal plate; the top surface of the second pouring layer is lower than the horizontal plate of the bolt support;
a top cover plate is arranged above the second pouring layer and between the horizontal plate and the vertical plate of the bolt support; wherein, the top cover plate is provided with a pulp pressing hole;
and pressure grouting is carried out in a closed space formed by the vertical plate, the concrete bearing platform, the outer wall of the blast furnace hot blast stove, the bolt support horizontal plate and the top cover plate through the grouting holes.
Further, still include:
after the pressure grouting, a third pouring layer is poured on the outer lower part of the vertical plate.
The invention has the beneficial effects that: according to the invention, the second pouring layer is poured on the periphery of the blast furnace hot blast stove, and a gap between the pouring layer of the blast furnace hot blast stove at the bottom of the blast furnace hot blast stove and the concrete bearing platform is sealed, so that hot air in the blast furnace hot blast stove is prevented from leaking, operation and leakage point searching from the inside of the blast furnace hot blast stove are not needed, the repairing difficulty is reduced, the stable air pressure in the blast furnace hot blast stove is ensured, normal high-temperature hot air is provided for the blast furnace, and the powerful guarantee is provided for the normal production of the blast furnace.
[ description of the drawings ]
FIG. 1 is a schematic view of a blast furnace hot blast stove foundation air leakage repairing structure in an embodiment of the invention;
wherein: 1. a blast furnace hot blast stove; 2. a bolt support horizontal plate; 3. a top cover plate; 4. a second irrigation layer; 5. a vertical plate; 6. a blast furnace hot blast stove pouring layer; 7. a first irrigation layer; 8. reinforcing steel bars inside the bearing platform; 9. concrete bearing platform.
[ detailed description ] embodiments
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
The embodiment of the invention discloses a blast furnace hot blast stove air leakage repairing structure which comprises a vertical plate 5 arranged around the outer wall of a blast furnace hot blast stove 1, wherein the vertical plate 5 is positioned outside a bolt support horizontal plate 2 of the blast furnace hot blast stove 1, as shown in figure 1. The bottom of the vertical plate 5 is fixedly arranged in a concrete bearing platform 9 of the blast furnace hot blast stove 1; a cavity is formed by the vertical plate 5, the concrete bearing platform 9, the outer wall of the blast furnace hot blast stove 1 and the bolt support horizontal plate 2; a second pouring layer 4 is poured in the cavity, and the second pouring layer 4 realizes the sealing between a blast furnace hot blast stove pouring layer 6 at the bottom of the blast furnace hot blast stove and a concrete bearing platform 9; and a top cover plate 3 is arranged above the second pouring layer 4 and between the bolt support horizontal plate 2 and the vertical plate 5.
The second pouring layer is poured on the periphery of the blast furnace hot blast stove, a gap between the pouring layer of the blast furnace hot blast stove at the bottom of the blast furnace hot blast stove and the concrete bearing platform is sealed, hot air in the blast furnace hot blast stove is prevented from leaking, the stability of the air pressure in the blast furnace hot blast stove is guaranteed, normal high-temperature hot air is provided for the blast furnace, and powerful guarantee is provided for normal production of the blast furnace.
In this embodiment, in order to ensure the firmness of the vertical plate 5, a pouring groove is formed in the concrete bearing platform 9 and the connection part between the concrete bearing platform and the vertical plate 5, and a first pouring layer 7 is arranged in the pouring groove. In order to ensure the integrity of the connection between the first pouring layer 7 and the vertical plate 5 and the bearing platform internal reinforcing steel bars 8, the bottom surface of the pouring groove is positioned below the bearing platform internal reinforcing steel bars 8. In this embodiment, the pouring groove is an annular groove chiseled out along the outer side of the anchor bolt support of the furnace shell of the hot blast furnace, specifically, the groove is 100mm wide and 200mm deep, and the reinforcing steel bars in the groove cannot be chiseled off and reserved. And the space of the groove below the steel bar is 30-50 mm.
The first casting layer 7 can be made of glass fiber composite resin casting material, and the viscosity can be enhanced. The bottom end of the vertical plate 5 is fixedly connected with a bearing platform internal reinforcing steel bar 8 in the concrete bearing platform 9. Can play the fixed action to riser 5 simultaneously through first watering layer 7 and cushion cap inside reinforcing bar 8, guarantee that its position can not change when watering. In addition, the lower extreme of riser 5 preferably adopts welded connection with cushion cap inside reinforcing bar 8, and like this, riser 5 links as an organic whole with cushion cap inside reinforcing bar 8, even as an organic whole with the cushion cap promptly, and is more firm reliable.
In this embodiment, riser 5 can adopt the concatenation of polylith steel sheet to form, in this embodiment, adopts thick 12mm, wide 800 mm's steel sheet, adopts the welding between each steel sheet to guarantee the intensity of its cavity that forms with other parts, avoid taking place the exploding mould when watering.
The second casting layer 4 is made of heat-resistant concrete, and in this embodiment, the concrete strength is C30 and the heat-resistant temperature is 300 ℃. On the one hand, the pouring integrity of the gap is guaranteed, and on the other hand, the heat-resistant concrete can adapt to the high temperature of a blast furnace hot blast stove, so that the phenomenon that the conventional concrete deforms at high temperature for a long time to generate the gap is avoided. Top apron 3 adopts the steel sheet of thickness 12mm to make in this embodiment, through top apron 3, can realize the closure of cavity, and then through the mud jacking hole of seting up on it, carries out pressure grouting, can guarantee through pressure grouting that second watering layer 4 is bubble-free, and is full of whole cavity, avoids producing the gap once more, can also increase the integrality on second watering layer 4 (heat-resisting concrete layer promptly) through pressure grouting.
In this embodiment, in order to perform pressure grouting, it is necessary to ensure that the top surface of the second potting layer 4 is below the bolt support horizontal plate 2. In the embodiment, the pouring top surface of the second pouring layer 4 is 15-20 mm lower than the horizontal plate of the bolt support.
In addition, a pressure grouting layer is further included in the embodiment, and the pressure grouting layer is located between the concrete bearing platform 9 and the blast furnace hot blast stove grouting layer. Can realize through the third watering layer that concrete cushion cap 9 and blast furnace hot-blast stove water between the layer sealed, this pressure watering layer can adopt grouting material commonly used, only need satisfy sealed can.
In this embodiment, in order to further ensure the firmness of the vertical plate 5, a reinforcing rib is connected between the vertical plate 5 and the horizontal plate 2 of the bolt support, and in this embodiment, a reinforcing rib is adopted
The reinforcing bar can give riser 5 a pulling force in the horizontal direction through the reinforcing bar as the strengthening rib, shifts under the effect of the extrusion force when preventing to carry out the pouring of first watering layer 4.
In this embodiment, in order to prevent the outside ponding of riser 5, influence the sealed effect of second watering layer 7, can set up the fourth watering layer in the outside bottom of riser 5, this fourth watering layer does not have special requirement, adopts conventional concrete can.
In the construction of the structure, a third pouring layer is poured between the concrete bearing platform 9 and the pouring layer of the blast furnace hot blast stove to ensure that the sealing performance between the concrete bearing platform and the pouring layer of the blast furnace hot blast stove is good.
Then, digging a pouring groove on a concrete bearing platform 9 around the outside of the blast furnace hot blast stove 1; wherein, the pouring groove is closed, and the bottom surface is positioned below the reinforcing steel bar 8 in the bearing platform. Specifically, the irrigation groove can form a ring shape around the blast furnace hot blast stove, and the uniform and good sealing of an irrigation layer around the blast furnace hot blast stove is ensured.
Then, with the bottom and the inside reinforcing bar 8 welding of cushion cap of riser 5 to casting first watering layer 7 in watering the inslot, in order to guarantee connection integrality and viscidity between the remaining riser 5 of first watering layer 7 and the inside reinforcing bar 8 of cushion cap, first watering layer 7 adopts the glass fiber composite resin pouring material to water the interior waste material of groove that need will be watered with compressed gas and blow clean, with the fastness after guaranteeing the watering. The pouring material needs to be prepared into a sample according to the proportion in advance, and the whole groove sealing pouring construction can be carried out when the performance of the sample reaches the required performance.
In addition, in order to increase the firmness of the vertical plate 5, a plurality of reinforcing ribs are connected between the vertical plate 5 and the bolt support horizontal plate 2 of the blast furnace hot blast stove 1.
At the moment, pouring a second pouring layer 4 into a cavity formed by the vertical plate 5, the concrete bearing platform 9, the outer wall of the blast furnace hot blast stove 1 and the bolt support horizontal plate 2; wherein, after the second casting layer 4 is formed, a grouting operation can be performed, wherein the top surface of the second casting layer 4 is lower than the bolt support horizontal plate 2.
A top cover plate 3 is arranged above the second pouring layer 4 and between the bolt support horizontal plate 2 and the vertical plate 5; wherein, the top cover plate 3 is provided with a pulp pressing hole for later pulp pressing.
Pressure grouting is carried out in a closed space formed by the vertical plate 5, the concrete bearing platform 9, the outer wall of the blast furnace hot blast stove 1, the bolt support horizontal plate 2 and the top cover plate 3 through the grouting holes so as to ensure that no air bubble exists in the first pouring layer 7 and the viscosity is increased.
In addition, in order to ensure that the first pouring layer 7 is not affected by the outside accumulated water, in the embodiment, after the bottom ends of the vertical plates 5 are welded with the bearing platform internal reinforcing steel bars 8, and the first pouring layer 7 is poured into the pouring groove, and the checking treatment effect is not leaked, a fourth pouring layer is poured on the lower portion of the outer sides of the vertical plates 5, and concrete pouring can be selected for the fourth pouring layer.
The construction method for repairing the structure by the air leakage of the blast furnace hot blast stove has the advantages of simple construction structure, low on-site construction difficulty, small risk and good plugging effect, and can meet the process safety requirements of the blast furnace hot blast stove equipment.
Claims (10)
1. The utility model provides a blast furnace hot-blast stove furnace base leaks out and restores structure which characterized in that includes:
the vertical plate (5) is arranged around the outer wall of the blast furnace hot blast stove (1), and the vertical plate (5) is positioned outside the bolt support horizontal plate (2) of the blast furnace hot blast stove (1);
the bottom of the vertical plate (5) is fixedly arranged in a concrete bearing platform (9) of the blast furnace hot blast stove (1);
the vertical plate (5), the concrete bearing platform (9), the outer wall of the blast furnace hot blast stove (1) and the bolt support horizontal plate (2) form a cavity;
a second pouring layer (4) formed by pouring is arranged in the cavity, and the second pouring layer (4) is used for sealing between a blast furnace hot blast stove pouring layer (6) at the bottom of the blast furnace hot blast stove and a concrete bearing platform (9);
and a top cover plate (3) is arranged above the second pouring layer (4) and between the bolt support horizontal plate (2) and the vertical plate (5).
2. The blast furnace hot blast stove foundation air leakage repairing structure according to claim 1, wherein the top surface of the second casting layer (4) is lower than the bolt support horizontal plate (2).
3. The blast furnace hot blast stove foundation air leakage repairing structure according to claim 2, characterized in that a pouring groove is opened in the concrete bearing platform (9) and at the connection part with the vertical plate (5), and a first pouring layer (7) is arranged in the pouring groove.
4. The blast furnace hot blast stove foundation air leakage repairing structure according to claim 2 or 3, further comprising a pressure grouting layer, wherein the pressure grouting layer is positioned between the concrete bearing platform (9) and the blast furnace hot blast stove grouting layer.
5. The blast furnace hot blast stove foundation air leakage repairing structure according to claim 3, characterized in that the bottom ends of the vertical plates (5) are fixedly connected with the bearing platform internal steel bars (8) in the concrete bearing platform (9).
6. The blast furnace hot blast stove foundation air leakage repairing structure according to claim 1, characterized in that a reinforcing rib is connected between the vertical plate (5) and the bolt support horizontal plate (2).
7. The blast furnace hot blast stove foundation air leakage repairing structure according to claim 1, characterized in that the outer bottom of the vertical plate (5) is provided with a third pouring layer.
8. The blast furnace hot blast stove foundation air leakage repairing structure according to claim 3, wherein the bottom surface of the pouring slot is positioned below the inner steel bar (8) of the bearing platform.
9. A construction method for repairing a blast furnace hot blast stove foundation air leakage structure is characterized by comprising the following steps:
pouring a pressure grouting layer between the concrete bearing platform (9) and the blast furnace hot blast stove pouring layer;
a pouring groove is cut on the concrete bearing platform (9) around the outside of the blast furnace hot blast stove (1); wherein the bottom surface of the pouring slot is positioned below the reinforcing steel bars (8) in the bearing platform;
welding the bottom end of the vertical plate (5) with the reinforcing steel bar (8) in the bearing platform, and casting a first pouring layer (7) into the pouring groove;
a plurality of reinforcing ribs are connected between the vertical plate (5) and the bolt support horizontal plate (2) of the blast furnace hot blast stove (1);
pouring a second pouring layer (4) into a cavity formed by the vertical plate (5), the concrete bearing platform (9), the outer wall of the blast furnace hot blast stove (1) and the bolt support horizontal plate (2); wherein the top surface of the second pouring layer (4) is lower than the bolt support horizontal plate (2);
a top cover plate (3) is arranged above the second pouring layer (4) and between the bolt support horizontal plate (2) and the vertical plate (5); wherein, the top cover plate (3) is provided with a pulp pressing hole;
and pressure grouting is carried out in a closed space formed by the vertical plate (5), the concrete bearing platform (9), the outer wall of the blast furnace hot blast stove (1), the bolt support horizontal plate (2) and the top cover plate (3) through the grouting holes.
10. The construction method of the blast furnace hot blast stove foundation air leakage repairing structure according to claim 9, further comprising:
after the pressure grouting, a third pouring layer is poured on the outer lower part of the vertical plate (5).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911041780.3A CN110656213A (en) | 2019-10-30 | 2019-10-30 | Blast furnace hot blast stove foundation air leakage repairing structure and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911041780.3A CN110656213A (en) | 2019-10-30 | 2019-10-30 | Blast furnace hot blast stove foundation air leakage repairing structure and construction method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113814598A (en) * | 2021-10-28 | 2021-12-21 | 上海宝冶冶金工程有限公司 | Method for mounting furnace shell of ultra-large hot blast furnace |
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| CN109825658A (en) * | 2019-02-28 | 2019-05-31 | 中国十九冶集团有限公司 | Method for treating air leakage of hot blast stove bottom plate |
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| CN210711606U (en) * | 2019-10-30 | 2020-06-09 | 陕西龙门钢铁有限责任公司 | Blast furnace hot blast stove furnace base leaks out and restores structure |
-
2019
- 2019-10-30 CN CN201911041780.3A patent/CN110656213A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR20010064937A (en) * | 1999-12-20 | 2001-07-11 | 이구택 | Apparatus for measuring and collecting the leakage gas from tuyer of furnace |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113814598A (en) * | 2021-10-28 | 2021-12-21 | 上海宝冶冶金工程有限公司 | Method for mounting furnace shell of ultra-large hot blast furnace |
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