CN117660712A - Method for online pouring of blast furnace taphole mud sleeve - Google Patents
Method for online pouring of blast furnace taphole mud sleeve Download PDFInfo
- Publication number
- CN117660712A CN117660712A CN202410073063.3A CN202410073063A CN117660712A CN 117660712 A CN117660712 A CN 117660712A CN 202410073063 A CN202410073063 A CN 202410073063A CN 117660712 A CN117660712 A CN 117660712A
- Authority
- CN
- China
- Prior art keywords
- mud
- mud sleeve
- sleeve
- tap hole
- blast furnace
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 19
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 62
- 229910052742 iron Inorganic materials 0.000 claims abstract description 31
- 239000000463 material Substances 0.000 claims abstract description 27
- 238000007789 sealing Methods 0.000 claims abstract description 18
- 230000000903 blocking effect Effects 0.000 claims abstract description 17
- 238000005553 drilling Methods 0.000 claims abstract description 10
- 238000003466 welding Methods 0.000 claims abstract description 10
- 238000010926 purge Methods 0.000 claims abstract description 7
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 22
- 239000010959 steel Substances 0.000 claims description 22
- 239000007789 gas Substances 0.000 claims description 11
- 238000010079 rubber tapping Methods 0.000 claims description 9
- 239000010425 asbestos Substances 0.000 claims description 7
- 238000012856 packing Methods 0.000 claims description 7
- 229910052895 riebeckite Inorganic materials 0.000 claims description 7
- 238000005266 casting Methods 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 3
- 238000010009 beating Methods 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 239000001301 oxygen Substances 0.000 claims description 3
- 229910052760 oxygen Inorganic materials 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 230000008439 repair process Effects 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000005336 cracking Methods 0.000 abstract description 2
- 206010025482 malaise Diseases 0.000 abstract description 2
- 238000004873 anchoring Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000009415 formwork Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The invention belongs to the technical field of pouring of a blast furnace taphole mud sleeve, and particularly relates to a method for pouring the blast furnace taphole mud sleeve on line, which comprises the following steps of disassembling the mud sleeve: drilling a tap hole by using a drill rod for 500-600mm before disassembling the mud sleeve; screwing the tap hole channel into 300mm by using a mud sleeve with a drill bit; placing the grate in a tap hole area; disassembling the material layer around the mud sleeve by 100-200 mm; purging dry materials in the iron notch frame by pressure air, and checking whether an easily movable material layer exists or not again after purging is completed, and disassembling; and (3) supporting a die: uniformly sprinkling the curing agent to the whole mud sleeve before supporting the mould; welding L-shaped blocking hooks on two sides of the iron notch frame, tightly adhering the sealing plate to the iron notch frame, and welding an old drill rod to the L-shaped blocking hooks for fixing the sealing plate; the phenomenon of blocking and mud-like phenomenon caused by frequent falling of the mud sleeve is avoided; the large-area falling-off phenomenon of the mud sleeve caused by the cracking of the mud sleeve is prevented, the safety of blocking the mouth is ensured, and the blast furnace wind-reducing operation is stopped; after the mud sleeve is poured on line, the 'sickness' operation of the mud sleeve during the normal production of the blast furnace is eliminated, the hidden danger of the mud sleeve is eliminated, and the safety plugging is ensured.
Description
Technical Field
The invention belongs to the technical field of pouring of a blast furnace taphole mud sleeve, and particularly relates to a method for pouring the blast furnace taphole mud sleeve on line.
Background
The blast furnace iron notch is a key of long service life of the blast furnace, an important component of the iron notch is a mud sleeve, and the mud sleeve is damaged and falls off in the use process. Once the mud sleeve material is used for repairing, the new material and the old material are combined loose in the repairing process, and are easy to fall off again. So that the whole mud sleeve is frequently repaired within the service period of 90 days.
After the mud sleeve is repaired, the repaired mud sleeve material is easy to fall off, so that the phenomenon of blocking and running mud is caused, and once the blocking and running mud is caused, the normal production of the blast furnace can be directly influenced.
After the mud sleeve is fallen, the mud sleeve is impacted by gas fire, cracks are easy to appear in the mud sleeve, large-area falling of the mud sleeve is caused, the safety of plugging openings is affected, once the falling is serious, the blast furnace is directly prevented from plugging the openings, the blast furnace wind reducing operation is caused, and the production of the blast furnace is directly affected.
The mud sleeve is manufactured when the blast furnace is overhauled, the service cycle of the mud sleeve is 90 days, the overhauling cycle of the blast furnace is 180 days, and hidden danger operation exists in the 90 days.
Disclosure of Invention
The invention aims to provide a method for casting a blast furnace taphole mud sleeve on line.
The technical scheme adopted for solving the technical problems is as follows: a method for pouring a blast furnace taphole mud sleeve on line comprises the following steps:
1) Disassembling the mud sleeve: drilling a tap hole by using a drill rod for 500-600mm before disassembling the mud sleeve; screwing the tap hole channel into 300mm by using a mud sleeve with a drill bit; placing the grate in a tap hole area; disassembling the material layer around the mud sleeve by 100-200 mm; purging dry materials in the iron notch frame by pressure air, and checking whether an easily movable material layer exists or not again after purging is completed, and disassembling;
2) And (3) supporting a die: uniformly sprinkling the curing agent to the whole mud sleeve before supporting the mould; welding L-shaped blocking hooks on two sides of the iron notch frame, tightly adhering the sealing plate to the iron notch frame, and welding an old drill rod to the L-shaped blocking hooks for fixing the sealing plate; the mud gun is used for locating the center line of the iron notch, a hole is formed in the sealing plate, a steel pipe is placed in the center of the iron notch, and after the steel pipe is installed, a main ditch is welded with a support steel pipe bracket;
3) Pouring: after uniformly stirring the mud jacking, conveying the mud jacking into the mud jacking through a pouring hole at the upper side of a sealing plate, and vibrating by using a vibrating rod after pouring 1/3 of the total amount of the mud jacking when the mud jacking is poured until the mud jacking is filled; when the castable reaches the pouring port, placing the dry material into the pouring port, and tamping the mud jacking by utilizing a large hammer striking steel shovel;
4) Baking: after pouring the mud sleeve, naturally cooling for 30 minutes, and removing the sealing plate; drilling to 700mm position with drill rod, baking with small fire for more than 0.5 hr, baking with medium fire for more than 0.5 hr, and baking with big fire until tapping;
5) Opening a tap hole after baking the mud sleeve, and performing plugging operation after tapping for 30 minutes, wherein the secondary pressure of stemming before plugging is not higher than 6Mpa; plugging and beating 1.0 grid, and maintaining pressure.
Specifically, in the step 1), the material layer around the mud sleeve is disassembled by 100-200mm, and the purpose is to disassemble the mud sleeve to the anchoring piece and repair the anchoring piece.
Specifically, the installation position of the steel pipe in the step 2) is the installation position of the steel pipe to the bottom of the iron notch.
Specifically, in the step 3), if the gas fire is large, the asbestos packing is made into 300mm pieces, and a large hammer is used for knocking a steel shovel to compact the asbestos packing and the mud sleeve material together to the inner wall of the mud sleeve.
Specifically, in the step 4), if the gas conduit is not detached, oxygen is utilized to melt, and after the melting, a mud gun is used for aligning the mud sleeve, and a gun pad mark is pressed.
Specifically, if the opening is blocked and mud is removed in the step 5), the iron notch is opened again for tapping for 30 minutes, and the opening is blocked again.
The invention has the following beneficial effects:
1) The phenomenon of blocking and mud-like phenomenon caused by frequent falling of the mud sleeve is avoided;
2) The large-area falling-off phenomenon of the mud sleeve caused by the cracking of the mud sleeve is prevented, the safety of blocking the mouth is ensured, and the blast furnace wind-reducing operation is stopped;
3) After the mud sleeve is poured on line, the 'sickness' operation of the mud sleeve during the normal production of the blast furnace is eliminated, the hidden danger of the mud sleeve is eliminated, and the safety plugging is ensured.
Drawings
Fig. 1 is a schematic structural view of the present invention.
In the figure: 1-a tap hole frame; 2-pouring a mud sleeve into a die; 3-a tap hole; 4-gas conduit; 5-a castable discharging opening.
Detailed Description
The invention will now be described in further detail with reference to the accompanying drawings.
Referring to fig. 1, a method for casting a blast furnace taphole mud sleeve on line comprises the following steps:
the first step: tool preparation
2 bags of mud sleeve materials, 5 barrels of adhesive, 5 lifting sheets of big coal, 2 sleeves of pneumatic pick, 6 steel drills of pneumatic pick, a sealing plate of a tap hole frame (manufactured in advance and a charging hole), 4 old drill pipes, a special discharging shovel, a vibrating rod (medium size), 50 steel pipes (5 meters) with the diameter, 20-30 anchoring pieces, asbestos packing (1.5 meters) and a grate.
And a second step of: disassembling mud sleeve
1. Drilling the iron notch 3 by using a drill rod for 500-600mm before disassembling the mud sleeve;
2. the mud sleeve with the drill bit is used, a channel of the iron notch 3 is screwed into 300mm, and the grate is placed in the area of the iron notch 3;
3. disassembling the material layer around the mud sleeve by 100-200mm, and disassembling the material layer inwards as far as possible, wherein the material layer is required to be disassembled to an anchoring piece;
4. checking the condition of the anchoring piece, performing missing welding and encrypting the welding of the anchoring piece;
5. the dry materials in the iron notch frame 1 are purged by the pressure air, and after purging is finished, whether the material layer easy to move exists or not is checked again, disassembly is carried out, and no loosening is confirmed;
and a third step of: formwork support
1. Uniformly sprinkling the curing agent to the whole mud sleeve before supporting the mould;
2. welding L-shaped blocking hooks (used for fixing old drill rods) on the left side and the right side of the iron notch frame 1, tightly attaching the sealing plate to the iron notch frame 1, and welding the old drill rods to the blocking hooks for fixing the sealing plate;
3. the gun is used for finding the center line of the iron notch, and a hole is formed in the sealing plate to enable the steel pipe to be placed into the center of the iron notch (the steel pipe is required to be installed at the bottom of the pre-drilling iron notch 3 in the earlier stage, the steel pipe is prevented from not being bottom, and the steel pipe shakes). After the steel pipe is installed, a support steel pipe bracket is welded on the main ditch;
fourth step: pouring
1. After uniformly stirring the mud jacking, conveying the mud jacking into the mud jacking through a castable blanking opening 5 on the upper side of the sealing plate by using a special shovel, and vibrating by using a vibrating rod after pouring 1/3 of the total amount of the mud jacking until the mud jacking fills the mud jacking;
2. when the castable reaches the castable discharging opening 5, placing the dry castable into the castable discharging opening 5, and tamping the mud jacking by utilizing a large hammer to strike a steel shovel; when the fire of gas is large, the asbestos packing is made into one piece with the diameter of 300mm, and the asbestos packing and the mud sleeve material are compacted towards the inner wall of the mud sleeve;
fifth step: baking
1. After pouring the mud sleeve, naturally cooling for 30 minutes, and removing the sealing plate; after the gas conduit 4 is disassembled, when the gas conduit 4 is disassembled, oxygen is utilized to melt, a mud gun is used for aligning a mud sleeve (light pair) after the gas conduit is disassembled, and a gun pad mark is pressed;
2. drilling to 700mm (drilling depth is larger than depth of pre-drilling in advance) by using a drill rod;
3. baking with small fire for more than 0.5 hours, baking with medium fire for more than 0.5 hours, and baking with large fire until tapping. (the mud sleeve state after baking is red)
Sixth step: tapping operation
1. Opening a tap hole 3 after baking the mud sleeve, and performing plugging operation after tapping iron for 30 minutes (preheating a tap hole channel), wherein the secondary pressure of stemming before plugging is not higher than 6Mpa, so that the stemming is prevented from being beaten or the stemming is hard, and tar in the stemming cannot be emitted; plugging and beating mud for 1.0 grid, maintaining pressure through plugging, and fully filling gaps between newly manufactured mud sleeve materials and old materials with tar in stemming to ensure that the mud sleeve firmly and effectively seals off gas fire;
2. when the mud is removed when the blocking mouth is met, the iron outlet of the iron notch is opened again for 30 minutes, the blocking mouth is closed again, and the mud is prevented from being removed. Because the iron flow is larger when the opening is blocked, a layer of water stemming slurry can be smeared on the stemming pad, so that the burning loss of molten iron to the stemming pad is reduced, and the blocking opening is ensured not to be muddy.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The method for pouring the tap hole mud sleeve of the blast furnace on line is characterized by comprising the following steps of:
1) Disassembling the mud sleeve: drilling a tap hole by using a drill rod for 500-600mm before disassembling the mud sleeve; screwing the tap hole channel into 300mm by using a mud sleeve with a drill bit; placing the grate in a tap hole area; disassembling the material layer around the mud sleeve by 100-200 mm; purging dry materials in the iron notch frame by pressure air, and checking whether an easily movable material layer exists or not again after purging is completed, and disassembling;
2) And (3) supporting a die: uniformly sprinkling the curing agent to the whole mud sleeve before supporting the mould; welding L-shaped blocking hooks on two sides of the iron notch frame, tightly adhering the sealing plate to the iron notch frame, and welding an old drill rod to the L-shaped blocking hooks for fixing the sealing plate; the mud gun is used for locating the center line of the iron notch, a hole is formed in the sealing plate, a steel pipe is placed in the center of the iron notch, and after the steel pipe is installed, a main ditch is welded with a support steel pipe bracket;
3) Pouring: after uniformly stirring the mud jacking, conveying the mud jacking into the mud jacking through a castable blanking opening at the upper side of the sealing plate by using a special shovel, and vibrating by using a vibrating rod after 1/3 of the total amount of the poured mud jacking is poured until the mud jacking fills the mud jacking; when the castable reaches the castable discharging opening, placing the dry castable into the castable discharging opening, and tamping the mud jacking by utilizing a large hammer striking steel shovel;
4) Baking: after pouring the mud sleeve, naturally cooling for 30 minutes, and removing the sealing plate; drilling to 700mm position with drill rod, baking with small fire for more than 0.5 hr, baking with medium fire for more than 0.5 hr, and baking with big fire until tapping;
5) Opening a tap hole after baking the mud sleeve, and performing plugging operation after tapping for 30 minutes, wherein the secondary pressure of stemming before plugging is not higher than 6Mpa; plugging and beating 1.0 grid, and maintaining pressure.
2. The method for on-line pouring of a tap hole mud sleeve of a blast furnace according to claim 1, wherein the step 1) is to disassemble the material layer around the mud sleeve by 100-200mm, and the purpose is to disassemble the sleeve to an anchor and repair the anchor.
3. The method for in-line casting of a tap hole mud jacket of a blast furnace according to claim 1, wherein the installation position of the steel pipe in the step 2) is the installation position at the bottom of the tap hole.
4. The method for casting the tap hole mud sleeve on line of the blast furnace according to claim 1, wherein in the step 3), if the gas fire is large, the asbestos packing is made into a piece of 300mm, and a large hammer is used for knocking a steel shovel to compact the asbestos packing and the mud sleeve material together to the inner wall of the mud sleeve.
5. The method for in-line casting of a blast furnace taphole mud cover according to claim 1, wherein in the step 4), if the gas pipe is not removed, oxygen is used for melting, and a mud gun is used for aligning the mud cover after melting, so as to press a gun cushion mark.
6. The method for casting the tap hole mud jacket of the blast furnace on line according to claim 1, wherein if the tap hole is plugged and the mud is run out in the step 5), the tap hole is opened again for tapping for 30 minutes, and the tap hole is plugged again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410073063.3A CN117660712A (en) | 2024-01-18 | 2024-01-18 | Method for online pouring of blast furnace taphole mud sleeve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410073063.3A CN117660712A (en) | 2024-01-18 | 2024-01-18 | Method for online pouring of blast furnace taphole mud sleeve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117660712A true CN117660712A (en) | 2024-03-08 |
Family
ID=90064326
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410073063.3A Pending CN117660712A (en) | 2024-01-18 | 2024-01-18 | Method for online pouring of blast furnace taphole mud sleeve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117660712A (en) |
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2024
- 2024-01-18 CN CN202410073063.3A patent/CN117660712A/en active Pending
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