CN115627319A - Method for quickly replacing tubular bricks of steel tapping hole of converter - Google Patents
Method for quickly replacing tubular bricks of steel tapping hole of converter Download PDFInfo
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- CN115627319A CN115627319A CN202211369498.XA CN202211369498A CN115627319A CN 115627319 A CN115627319 A CN 115627319A CN 202211369498 A CN202211369498 A CN 202211369498A CN 115627319 A CN115627319 A CN 115627319A
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- steel
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- converter
- hole
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- 238000010079 rubber tapping Methods 0.000 title claims abstract description 126
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 115
- 239000010959 steel Substances 0.000 title claims abstract description 115
- 239000011449 brick Substances 0.000 title claims abstract description 101
- 238000000034 method Methods 0.000 title claims abstract description 19
- 239000002893 slag Substances 0.000 claims abstract description 21
- 239000000945 filler Substances 0.000 claims abstract description 19
- 238000005245 sintering Methods 0.000 claims abstract description 11
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 claims abstract description 10
- 238000003466 welding Methods 0.000 claims abstract description 5
- 239000000463 material Substances 0.000 claims description 15
- 238000005520 cutting process Methods 0.000 claims description 12
- 239000000956 alloy Substances 0.000 claims description 9
- 229910045601 alloy Inorganic materials 0.000 claims description 9
- 230000000903 blocking effect Effects 0.000 claims description 4
- 238000003780 insertion Methods 0.000 claims description 4
- 230000037431 insertion Effects 0.000 claims description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 3
- 229910052760 oxygen Inorganic materials 0.000 claims description 3
- 239000001301 oxygen Substances 0.000 claims description 3
- 230000008439 repair process Effects 0.000 claims description 3
- 239000004576 sand Substances 0.000 claims description 3
- 238000005457 optimization Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000006872 improvement Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000009628 steelmaking Methods 0.000 description 3
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000009970 fire resistant effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000033764 rhythmic process Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/42—Constructional features of converters
- C21C5/46—Details or accessories
- C21C5/4653—Tapholes; Opening or plugging thereof
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
The application provides a method for quickly replacing a converter tap hole tubular brick, wherein the length of the tap hole tubular brick is increased by 50mm compared with the original size, the length of the tap hole tubular brick is increased to 1350mm, the tap hole tubular brick is completely filled in each replacement, and an outer pipe opening of the tap hole tubular brick is controlled to be flush with a tap hole flange plate; reducing the maximum outer diameter of the drill bit for reaming to 255mm, welding tungsten carbide drill teeth on a cylindrical steel drill bit body in an inlaying mode, and controlling the width of a gap around a steel tapping hole pipe brick to be 8-12mm; hoisting the mounting platform by using a crown block to the front of the steel tapping hole, and replacing the mounting platform by a worker and a trolley; centering during hole expanding, wherein the hole expanding angle is controlled to be 9.5-10 degrees; the inner pipe mouth of the steel-tapping hole pipe brick is 10-50 mm lower than the slag splashing layer; controlling the quality of the filler; the sintering time is not less than 15min; the replacement time is shortened by about 20min compared with that before optimization, the operation rate is improved, and the operation environment and labor intensity of workers are improved.
Description
Technical Field
The invention relates to the technical field of converter steelmaking, in particular to a method for quickly replacing a tubular brick at a steel tapping hole of a converter.
Background
The steel tapping hole of the converter is the only channel for molten steel to enter a steel ladle from the converter, and because the steel passing amount of the steel tapping hole is large, the steel tapping hole is directly eroded and violently washed by high-temperature molten steel and high-oxidizing slag, and the steel tapping hole is extremely easy to damage due to the action of rapid cooling and rapid heating and the extremely bad working conditions, the production time is influenced, the steel tapping time is relatively prolonged, and the yield is reduced. In order to ensure the replacement quality of the steel tapping hole, the replacement time is generally about 70min, and a plurality of indexes such as molten steel quality, converter shape control, steel material consumption control, steel-making production rhythm and the like are directly influenced.
Therefore, how to better solve the problem of shortening the replacement time in the replacement process of the steel tapping hole of the converter is a key problem of ensuring the use effect of the steel tapping hole and improving the operation rate of the converter.
Disclosure of Invention
The invention aims to provide a method for quickly replacing a tubular brick at a steel tapping hole of a converter.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
a method for quickly replacing a steel-tapping hole tubular brick of a converter is characterized in that the length of the steel-tapping hole tubular brick is increased by 50mm compared with the original size, the length of the steel-tapping hole tubular brick is increased to 1350mm, the steel-tapping hole tubular brick is completely filled in each replacement, and an outer pipe opening of the steel-tapping hole tubular brick is controlled to be flush with a steel-tapping hole flange plate.
Preferably, selecting a reasonable reaming diameter, and reducing the maximum outer diameter of the drill bit for reaming the steel tapping hole to 255mm;
optimizing the structure of the drill bit for reaming the steel tapping hole of the converter, welding tungsten carbide drill teeth on a cylindrical steel drill body in an inlaying mode, and adopting multilayer geometric cutting to improve the drainage performance, reduce the cutting resistance and improve the cutting capability, wherein the tungsten carbide hard alloy is used for replacing cast wear-resistant alloy;
the width of the gap around the steel-tapping hole pipe brick for filling the filler is controlled to be 8-12mm.
Preferably, a special mounting platform for a steel tapping hole of the converter is designed, the converter is swung to the front of the converter, the mounting platform is hung and placed in front of the steel tapping hole by using a crown block when a steel tapping hole pipe brick is mounted, a worker and a trolley are arranged on the mounting platform, the worker loads the steel tapping hole pipe brick into the steel tapping hole after reaming through the trolley, and the worker is close to the converter body to operate.
Preferably, controlling the reaming angle: before reaming operation, the positions of a car body and a drill rod of the furnace dismantling machine and the tilting position of a furnace body are adjusted, the center line of a drill bit is kept coincident with the center line of a steel tapping hole, the position of the furnace dismantling machine and the tilting position of the furnace body are adjusted along with the increase of the reaming depth, and the reaming angle is controlled to be 9.5-10 degrees.
Preferably, the centering and positioning of the tap hole brick:
after the steel-tapping hole tubular brick is inserted into a hole formed after reaming, the angle and the position of the steel-tapping hole tubular brick are centered and finely adjusted to ensure that the steel-tapping hole tubular brick is not deflected;
the insertion depth of the steel tapping hole is ensured, and the inner pipe orifice of the steel tapping hole tubular brick is 10-50 mm lower than the slag splashing layer.
Preferably, the filler quality is controlled: firstly, rocking the furnace to the front of the furnace, filling Ma Dingsha from the outer side of the furnace body inwards, wherein the martin sand needs to be balanced and compact, then after rocking the furnace to the furnace, filling the furnace material from the inner side, filling the furnace material while tamping, wherein the height of the filler is not higher than a slag splashing layer, so that a bell mouth can be formed quickly, and slag blocking is facilitated;
the filling is adopted to repair the seriously corroded part of the steel outlet surface of the converter, so that obvious pits are not required to be formed around and below the steel outlet.
Preferably, the sintering is controlled: the sintering time with oxygen is not less than 15min.
The application provides a method for quickly replacing a tubular brick of a steel-tapping hole of a converter, wherein the length of the tubular brick of the steel-tapping hole is increased by 50mm compared with the original size, the length of the tubular brick of the steel-tapping hole is increased to 1350mm, the tubular brick of the steel-tapping hole is completely filled in each replacement, an outer pipe opening of the tubular brick of the steel-tapping hole is controlled to be flush with a flange plate of the steel-tapping hole, and the installation can be completed without a post worker observing the condition of the inner pipe opening of the steel-tapping hole through a slag channel;
reducing the maximum outer diameter of the drill bit for reaming the steel tapping hole to 255mm, welding tungsten carbide drill teeth on the cylindrical steel drill bit body in an inlaying mode, and controlling the width of a gap around a steel tapping hole pipe brick to be 8-12mm;
hoisting the mounting platform by using a crown block to the front of the steel tapping hole, and replacing the mounting platform by a worker and a trolley;
centering during hole expanding, wherein the hole expanding angle is controlled to be 9.5-10 degrees;
the inner pipe mouth of the steel-tapping hole pipe brick is 10-50 mm lower than the slag splashing layer;
controlling the quality of the filler;
the sintering time is not less than 15min;
the centering and positioning operation is easy, the replacement process is simple and reliable, meanwhile, by using the platform special for replacing the tubular bricks at the steel tapping hole, the replacement time of the tubular bricks at the steel tapping hole is shortened by about 20min compared with that before optimization, the operation rate of the converter is improved, the operation environment of workers is improved, the safety production of the converter is improved, the labor intensity of the workers is reduced, the competitiveness of enterprises is enhanced, and the platform has an important driving effect on the development of the safety production.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are a part of the embodiments of the present invention, but not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
The application provides a method for quickly replacing a converter tap hole tubular brick, the length of the tap hole tubular brick is increased by 50mm compared with the original size, the length of the tap hole tubular brick is increased to 1350mm, the tap hole tubular brick is completely loaded during replacement every time, and the outer orifice of the tap hole tubular brick is controlled to be flush with a tap hole flange plate.
In one embodiment of the application, a reasonable reaming diameter is selected, and the maximum outer diameter of the drill bit for reaming the steel tapping hole is reduced to 255mm;
optimizing the structure of the drill bit for reaming the steel tapping hole of the converter, welding tungsten carbide drill teeth on a cylindrical steel drill body in an inlaying mode, and adopting multilayer geometric cutting to improve the drainage performance, reduce the cutting resistance and improve the cutting capability, wherein the tungsten carbide hard alloy is used for replacing cast wear-resistant alloy;
the width of the gap around the steel-tapping hole pipe brick for filling the filler is controlled to be 8-12mm.
In one embodiment of the application, a mounting platform special for a steel outlet of a converter is designed, the converter is swung to the front of the converter, the mounting platform is hung and placed in front of the steel outlet by using a crown block when a steel outlet tubular brick is mounted, a worker and a trolley are arranged on the mounting platform, the worker loads the steel outlet tubular brick into the steel outlet after hole expansion through the trolley, and the worker approaches a converter body for operation.
In one embodiment of the present application, controlling the reaming angle: before reaming, the positions of the body and the drill rod of the furnace dismantling machine and the tilting position of the furnace body are adjusted, the center line of the drill bit is kept coincident with the center line of the steel tapping hole, the position of the furnace dismantling machine and the tilting position of the furnace body are adjusted along with the increase of the reaming depth, and the reaming angle is controlled to be 9.5-10 degrees.
In one embodiment of the present application, the centering and positioning of the tap-hole brick:
after the steel-tapping hole tubular brick is inserted into a hole formed after reaming, the angle and the position of the steel-tapping hole tubular brick are centered and finely adjusted to ensure that the steel-tapping hole tubular brick is not deflected;
the insertion depth of the steel tapping hole is ensured, and the inner pipe orifice of the steel tapping hole tubular brick is 10-50 mm lower than the slag splashing layer.
In one embodiment of the present application, the filler quality is controlled: firstly, rocking the furnace to the front of the furnace, filling Ma Dingsha from the outer side of the furnace body inwards, wherein the martin sand needs to be balanced and compact, then after rocking the furnace to the furnace, filling the furnace material from the inner side, filling the furnace material while tamping, wherein the height of the filler is not higher than a slag splashing layer, so that a bell mouth can be formed quickly, and slag blocking is facilitated;
the filling is adopted to repair the seriously corroded part of the steel outlet surface of the converter, so that obvious pits are not required to be formed around and below the steel outlet.
In one embodiment of the present application, the sintering is controlled: the sintering time with oxygen is not less than 15min.
The inner diameter of the steel-tapping hole tubular brick in the application is 180mm, the outer diameter is 260mm, and the length is 1350mm.
In this application, according to actual conditions, through taking converter tap-hole size to carry out optimal design, optimize the tap-hole and change the device, measures such as improvement maintenance quality shorten and change the tap-hole time:
(1) The length of the steel tapping hole is optimized, the length is increased by 5cm compared with the original size, the tubular brick at the steel tapping hole is completely filled when the tubular brick is replaced each time, the outer hole is kept flat, and the installation can be completed without a post worker observing the inner hole condition of the steel tapping hole in a slag channel;
(2) Selecting a reasonable hole expanding diameter which can facilitate rapid filling and reduce the damage to the sleeve brick of the steel tapping hole;
the size, the structural form and the material of the drill bit for reaming the steel tapping hole are optimized, the maximum diameter of the drill bit is reduced to 255mm from 260mm, the structure of the drill bit for reaming the steel tapping hole of the converter is optimized, tungsten carbide hard alloy is welded on an original steel cylindrical drill bit body in an embedding mode, multi-layer geometric cutting is adopted, the drainage performance is improved, small cutting resistance is kept, the cutting capacity is greatly improved, the tungsten carbide hard alloy is used for replacing cast wear-resistant alloy, and the thickness of the filler around a steel tapping hole tubular brick is controlled to be about 10 mm;
(3) The converter is used for replacing the steel tapping hole pipe to operate near the furnace body, the operation environment is severe, the accumulated slag in a flue needs to be cleaned before operation, the accumulated slag is prevented from falling off and causing safety damage, in addition, the converter platform and the converter only have a distance of about 1m in the installation process of the steel tapping hole pipe, the operation space is narrow, the steel tapping hole pipe is installed into a drilled steel tapping hole by using a steel tapping hole trolley and can only be adjusted by depending on a long crowbar, and workers cannot install steel tapping hole pipe bricks close to the furnace body;
by designing the special mounting platform for the steel tapping hole of the converter, the platform is hung by the crown block before the steel tapping hole when the steel tapping hole is mounted, the steel tapping hole pipe is loaded into the steel tapping hole of the converter by the trolley, a worker can work close to a furnace body, the steel tapping hole pipe bricks are convenient to mount and adjust, the operation safety of the worker is guaranteed by the steel tapping hole pipe mounting platform, the operation flow of cleaning a flue is reduced, and the operation efficiency is improved.
In the present application, it is preferred that,
1) Strictly controlling the reaming angle, before reaming, adjusting the position of a car body and a drill rod of a furnace dismantling machine and the tilting position of a furnace body, keeping the center line of a drill bit coincident with the center line of a steel tapping hole, properly adjusting the tilting positions of the furnace dismantling machine and the furnace body along with the increase of the reaming depth, strictly preventing large deviation of the reaming angle, controlling the reaming angle to be 9.5-10 degrees, and avoiding damaging sleeve bricks of the steel tapping hole;
2) When the steel outlet is installed, the special installation platform for the steel outlet of the converter is hung and placed in front of the steel outlet by using the crown block, the steel outlet pipe is installed into the steel outlet of the converter through the trolley, and workers can work close to the converter body;
3) Strictly positioning and controlling the quality of the filler, finely adjusting the angle and the position of the steel-tapping hole tubular brick after the steel-tapping hole tubular brick is inserted into the furnace, ensuring that the steel-tapping hole tubular brick is not deflected and ensuring the reasonable insertion depth of the steel-tapping hole, wherein the distance between the steel-tapping hole tubular brick and the furnace is 10-50 mm lower than a slag splashing layer, firstly, the filler is filled from the outer side of the furnace body to the inner side, and the filler is balanced and compact; secondly, the filler is filled from the inner side, the filler is not required to be filled too much once in the filling process, the filler is required to be tamped while being filled, the height of the filler is not higher than a slag splashing layer, a horn mouth is conveniently and quickly formed, and slag blocking is facilitated; the filling material corrects the seriously corroded part of the steel tapping surface, so that obvious pits are not formed around and below the steel tapping hole;
4) And controlling the sintering time, wherein the sintering quality is ensured, and the sintering time is not less than 15min based on the fact that the filler is well sintered.
In the application, the steel tapping hole generally consists of a steel tapping hole pocket brick and a steel tapping hole sleeve brick (also called steel tapping hole pipe brick); the steel tapping hole brick cup is a brick sleeved outside the sleeve brick, and has the functions of protecting the sleeve brick, and supporting the converter brick at the outer side when the sleeve brick is replaced for drilling, so that the sleeve brick is convenient to replace, and the steel tapping hole brick cup comprises a split type brick cup and an integral type brick cup; the steel-tapping hole sleeve brick is a channel for molten steel of the converter to flow to a steel ladle, and is directly contacted with the molten steel, structurally, the steel-tapping hole sleeve brick is divided into an integral sleeve brick (also called a steel-tapping hole pipe brick) and a split sleeve brick, and an inner sleeve steel pipe and a collet flange are assembled into a whole for the steel-tapping hole sleeve brick to be conveniently installed on the converter for use. A gap of 10-30mm is reserved between the conventional steel tapping hole pocket brick and the sleeve brick during assembly, and the conventional steel tapping hole pocket brick and the sleeve brick are filled with ramming materials, spray coating materials or casting materials after being assembled.
In the application, the furnace dismantling machine is a machine for dismantling the fire-resistant layers of steel making furnaces, steel ladles, disintegrating machines and the like in the smelting industry, is mainly used for drilling operation for replacing steel tapping holes, cleaning slag adhered to a converter mouth and a furnace cap, dismantling furnace lining fire-resistant materials and the like, and is mainly applied to the steel industry, the metallurgy industry and the like. The furnace dismantling machine mainly comprises four modules of an operation tool (replaceable), a telescopic working arm, a platform and a chassis, wherein different operation tools (a hydraulic impactor, a hook shovel and a reamer) are additionally arranged on the working arm, so that various operations such as impact crushing, furnace dismantling, unpacking, fine expansion of a steel tapping hole, slag removal of a converter cap hole and a converter wall, auxiliary sleeve replacement of magnesia carbon bricks and the like can be completed.
In the present application, the orientation inside the converter is "inside" and the orientation outside the converter is "outside", for example: an inner pipe orifice of the steel tapping hole and an outer pipe orifice of the steel tapping hole pipe brick.
In this application, the stokehold of converter and stove back: in a common steel mill, the side of a converter operating chamber is called as the front of a furnace, and the side for tapping is called as the back of the furnace; the side opposite to the side with the operating chamber and the platform being wide is the front of the furnace, and the side with the narrow steel tapping hole is the back of the furnace.
The methods and devices not described in detail in the present invention are all the prior art and are not described in detail.
The above description of the embodiments is only intended to facilitate the understanding of the method of the invention and its core idea. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (7)
1. A method for quickly replacing a steel-tapping hole tubular brick of a converter is characterized in that the length of the steel-tapping hole tubular brick is increased by 50mm compared with the original size, the length of the steel-tapping hole tubular brick is increased to 1350mm, the steel-tapping hole tubular brick is completely filled in each replacement, and the outer orifice of the steel-tapping hole tubular brick is controlled to be flush with a steel-tapping hole flange plate.
2. The method of claim 1, wherein a reasonable reaming diameter is selected to reduce the maximum outer diameter of the tap hole reaming bit to 255mm;
optimizing the structure of the drill bit for reaming the steel tapping hole of the converter, welding tungsten carbide drill teeth on a cylindrical steel drill body in an inlaying mode, and adopting multilayer geometric cutting to improve the drainage performance, reduce the cutting resistance and improve the cutting capability, wherein the tungsten carbide hard alloy is used for replacing cast wear-resistant alloy;
the width of the gap around the steel-tapping hole pipe brick for filling the filler is controlled to be 8-12mm.
3. The method for rapidly replacing the tubular brick at the steel tapping hole of the converter as claimed in claim 1, wherein a mounting platform special for the steel tapping hole of the converter is designed, the converter is swung to the front of the converter, the mounting platform is hoisted by a crown block to the front of the steel tapping hole when the tubular brick at the steel tapping hole is mounted, a worker and a trolley are arranged on the mounting platform, the worker loads the tubular brick at the steel tapping hole after reaming through the trolley, and the worker is close to the furnace body to work.
4. The method for rapidly replacing a converter tap hole tubular brick as claimed in claim 1, wherein the reaming angle is controlled by: before reaming, the positions of the body and the drill rod of the furnace dismantling machine and the tilting position of the furnace body are adjusted, the center line of the drill bit is kept coincident with the center line of the steel tapping hole, the position of the furnace dismantling machine and the tilting position of the furnace body are adjusted along with the increase of the reaming depth, and the reaming angle is controlled to be 9.5-10 degrees.
5. The method for the rapid replacement of the tap-hole brick of a converter according to claim 1, characterized in that the centering and positioning of the tap-hole brick:
after the steel-tapping hole tubular brick is inserted into a hole formed after reaming, the angle and the position of the steel-tapping hole tubular brick are centered and finely adjusted to ensure that the steel-tapping hole tubular brick is not deflected;
the insertion depth of the steel tapping hole is ensured, and the inner pipe orifice of the steel tapping hole tubular brick is 10-50 mm lower than the slag splashing layer.
6. The method for the rapid replacement of the tap hole brick of the converter according to claim 1, characterized in that the quality of the filling material is controlled: firstly, rocking the furnace to the front of the furnace, filling Ma Dingsha from the outer side of the furnace body inwards, wherein the martin sand needs to be balanced and compact, then after rocking the furnace to the furnace, filling the furnace material from the inner side, filling the furnace material while tamping, wherein the height of the filler is not higher than a slag splashing layer, so that a bell mouth can be formed quickly, and slag blocking is facilitated;
the filling material is adopted to repair the seriously corroded part of the steel tapping surface of the converter, so that obvious pits can not be formed around and below the steel tapping hole.
7. The method for rapid replacement of a converter tap hole brick according to claim 1, characterized in that the sintering is controlled: the sintering time with oxygen is not less than 15min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211369498.XA CN115627319A (en) | 2022-11-03 | 2022-11-03 | Method for quickly replacing tubular bricks of steel tapping hole of converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211369498.XA CN115627319A (en) | 2022-11-03 | 2022-11-03 | Method for quickly replacing tubular bricks of steel tapping hole of converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115627319A true CN115627319A (en) | 2023-01-20 |
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|---|---|---|---|
| CN202211369498.XA Pending CN115627319A (en) | 2022-11-03 | 2022-11-03 | Method for quickly replacing tubular bricks of steel tapping hole of converter |
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| CN110863081A (en) * | 2019-11-20 | 2020-03-06 | 北京联合荣大工程材料股份有限公司 | Repairing device and repairing method for converter steel tapping hole |
| CN114622058A (en) * | 2022-04-22 | 2022-06-14 | 山东钢铁集团永锋临港有限公司 | Method for replacing steel tapping hole of converter |
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2022
- 2022-11-03 CN CN202211369498.XA patent/CN115627319A/en active Pending
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| CN103194572A (en) * | 2013-04-28 | 2013-07-10 | 莱芜钢铁集团有限公司 | Method for rapidly exchanging tapping hole |
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