CN218910419U - Metal slag blocking cap for front slag blocking of converter - Google Patents
Metal slag blocking cap for front slag blocking of converter Download PDFInfo
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- CN218910419U CN218910419U CN202223129061.7U CN202223129061U CN218910419U CN 218910419 U CN218910419 U CN 218910419U CN 202223129061 U CN202223129061 U CN 202223129061U CN 218910419 U CN218910419 U CN 218910419U
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- slag
- slag blocking
- blocking cap
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- 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
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Abstract
The utility model discloses a metal slag blocking cap for blocking slag before a converter, which comprises a slag blocking cap body, wherein the slag blocking cap body is a hollow conical cavity made of a metal sheet in a rolling way, joints of two side walls of the hollow conical cavity are overlapped but not welded into a whole, the diameter of a small end is smaller than the inner diameter of a new steel tapping hole, the diameter of a large end is larger than the inner diameter of a corroded steel tapping hole, the tail part of the large end of the hollow conical cavity is in a sawtooth shape, and the camber angle of the sawtooth shape is larger than the angle of the side wall of the hollow conical cavity. The metal slag blocking cap overcomes the defects of the traditional refractory slag blocking cap, has the characteristics of shrinkage and skid resistance, can be completely placed into the inner hole of the steel tapping hole, and can isolate furnace gas from entering the steel tapping hole, thereby playing roles of blocking slag in the early stage of steel tapping and prolonging the service life of the steel tapping hole.
Description
Technical Field
The utility model relates to the technical field of converter slag blocking, in particular to a metal slag blocking cap for blocking slag in front of a converter.
Background
Under normal conditions, the converter slag tapping is divided into three conditions of slag tapping before tapping, slag rolling at the later stage of tapping and slag tapping at the later stage of tapping, wherein after the slag tapping before falls into a ladle, the slag tapping before falls into the ladle, and the slag tapping before and the slag tapping after are continuously mixed with molten steel under the comprehensive actions of steel flow impact force and ladle bottom blowing, so that the hazard is greater.
The front slag blocking of the converter adopts a slag blocking cap, and the front slag blocking of each steel plant is formed by plugging the front half part of the slag blocking cap made of refractory materials into and out of a steel hole and clamping the front half part of the slag blocking cap at the outer opening of the steel hole. However, when the steel is poured into the furnace and tapped, the steel slag floating on the surface layer of the molten steel still flows into the tapping hole and falls into the ladle, and the effect of stopping the slag in the earlier stage cannot be effectively achieved. In addition, in the actual production process, foreign matters such as cold steel, slag and the like can adhere to the outer opening of the steel tapping hole, the outer opening of the steel tapping hole is in an irregular state, and the slag blocking cap made of refractory materials is easy to fall off in the furnace shaking process.
The method has the advantages of integrating the tapping characteristics of the converter, searching the reason of slag tapping in the early stage, avoiding slag tapping in the early stage of tapping, and having great significance for reducing the consumption of deoxidizing agent, improving the alloy yield, improving the molten steel components, prolonging the service life of a tapping hole and the like.
Disclosure of Invention
The technical problem to be solved by the utility model is to provide the metal slag stopping cap for stopping slag before the converter, which overcomes the defects of the traditional refractory slag stopping cap, has the characteristics of shrinkage and skid resistance, can be completely placed into the inner hole of the steel tapping hole, and can isolate furnace gas from entering the steel tapping hole, thereby playing roles of stopping slag in the early stage of steel tapping and prolonging the service life of the steel tapping hole.
In order to solve the technical problems, the metal slag blocking cap for front slag blocking of the converter comprises a slag blocking cap body, wherein the slag blocking cap body is a hollow conical cavity made of a metal sheet in a rolling mode, joints of two side walls of the hollow conical cavity are overlapped but not welded into a whole, the diameter of a small end is smaller than the inner diameter of a new steel tapping hole, the diameter of a large end is larger than the inner diameter of the corroded steel tapping hole, the tail of the large end of the hollow conical cavity is in a sawtooth shape, and the camber angle of the sawtooth shape is larger than the angle of the side wall of the hollow conical cavity.
Further, the large end and the small end of the hollow conical cavity are shrinkage holes, and the diameter of the small end is shrunk to be close to zero when the slag blocking cap body is pushed into the inner hole of the steel tapping hole.
Further, the thickness of the metal sheet is set so as to be resistant to slag from melting for 2 to 3 seconds and to be melted in 1 to 3 seconds by molten steel.
The technical scheme is that the metal slag blocking cap for blocking slag before the converter comprises a slag blocking cap body, wherein the slag blocking cap body is a hollow conical cavity formed by rolling a metal sheet, joints of two side walls of the hollow conical cavity are overlapped but not welded into a whole, the diameter of a small end is smaller than the inner diameter of a new steel tapping hole, the diameter of a large end is larger than the inner diameter of a corroded steel tapping hole, the tail part of the large end of the hollow conical cavity is in a sawtooth shape, and the camber angle of the sawtooth shape is larger than the angle of the side wall of the hollow conical cavity. The metal slag blocking cap overcomes the defects of the traditional refractory slag blocking cap, has the characteristics of shrinkage and skid resistance, can be completely placed into the inner hole of the steel tapping hole, and can isolate furnace gas from entering the steel tapping hole, thereby playing roles of blocking slag in the early stage of steel tapping and prolonging the service life of the steel tapping hole.
Drawings
The utility model is described in further detail below with reference to the attached drawings and embodiments:
FIG. 1 is a schematic view of a metal slag blocking cap for front slag blocking of a converter;
FIG. 2 is a top view of the small end of the hollow conical cavity of the metal slag blocking cap;
fig. 3 is a schematic diagram of the application of the metal slag cap.
Detailed Description
The metal slag cap for front slag blocking of the converter comprises a slag cap body 1, wherein the slag cap body 1 is a hollow conical cavity made of a metal sheet in a rolling mode, joints of two side walls of the hollow conical cavity are overlapped but not welded into a whole, the diameter of a small end 11 is smaller than the inner diameter of a new steel tapping hole, the diameter of a large end 12 is larger than the inner diameter of the corroded steel tapping hole, the tail of the large end 12 of the hollow conical cavity is in a sawtooth shape 13, and the camber angle of the sawtooth shape 13 is larger than the angle of the side wall of the hollow conical cavity.
Preferably, the large end head 12 and the small end head 11 of the hollow conical cavity are shrinkage holes, and the diameter of the small end head 11 is shrunk to be close to zero when the slag cap body 1 is pushed into the inner hole of the steel tapping hole.
Preferably, the thickness of the metal sheet is set so as to be resistant to slag from melting for 2 to 3 seconds and to be melted in 1 to 3 seconds by molten steel.
As shown in fig. 3, the body 1 of the metal slag cap is rolled into a hollow conical cavity by a metal sheet, after the metal sheet is rolled, two side walls of the hollow conical cavity are slightly overlapped but are not welded, the hollow conical cavity is extruded when being pushed into the steel tapping hole 2, the side walls of the hollow conical cavity can be contracted, and meanwhile, the reaction force is favorable for the metal slag cap to prop against the inner wall of the steel tapping hole 2, so that the metal slag cap is not easy to slide. The sawtooth shape 13 at the tail part of the hollow conical cavity enables the hollow conical cavity to be pushed into the steel tapping hole 2 and then can tightly prop against the inner wall of the refractory brick of the steel tapping hole 2 so as not to easily slide. Meanwhile, the diameter of the small end 11 of the hollow conical cavity is not too large, when the hollow conical cavity is pushed into the inner opening 21 of the steel-tapping hole 2, the small end 11 can shrink to be close to zero to be in an ideal state, so that slag discharging in the early stage of steel tapping is stopped or reduced, and meanwhile, erosion of smoke gas to refractory bricks of the steel-tapping hole in the blowing process of the converter is reduced.
A certain iron and steel company is provided with 2 converters of 120 tons, and annual output can be 400 ten thousand tons. And after tapping, rocking the furnace body back to a certain angle, and pushing the metal slag blocking cap to the inner hole of the tapping hole through a long rod tool with scales and limit marks. After the metal slag blocking cap is applied, the average service life of the steel tapping hole is prolonged from 295 to 305, the steel tapping is carried out to a proper angle, the molten steel is observed to flow out of the steel tapping hole after delay for 1-2 seconds, and the metal slag blocking cap can resist the damage of slag, can be melted in 1-3 seconds under the action of the molten steel, and has good slag blocking effect before blocking.
The inner diameter of a newly replaced tapping hole of a 120 ton converter of the company is 190mm, the length is 1800mm, and the specific gravity of slag is 3.0g/cm 3 And measuring and calculating, wherein the inner cavity volume of the steel tapping hole is 0.051m, and the slag amount in the steel tapping hole is about 150kg. The total iron content in the slag is calculated according to 20%, 7.66kg of metal aluminum deoxidizer is consumed more than for total reduction of iron in the earlier-stage slag, and the cost of the deoxidizer can be saved by about 500 ten thousand yuan per year, and the cost is reduced by 1.25 yuan per ton of steel by adopting the metal slag blocking cap for the iron and steel company.
Claims (3)
1. A metal slag blocking cap for pushing off slag before converter, its characterized in that: the slag blocking cap comprises a slag blocking cap body, wherein the slag blocking cap body is a hollow conical cavity made of a metal sheet in a rolling mode, joints of two side walls of the hollow conical cavity are overlapped but not welded into a whole, the diameter of a small end is smaller than the inner diameter of a new steel tapping hole, the diameter of a large end is larger than the inner diameter of the steel tapping hole after corrosion, the tail of the large end of the hollow conical cavity is in a sawtooth shape, and the camber angle of the sawtooth shape is larger than the angle of the side wall of the hollow conical cavity.
2. The metal slag blocking cap for front slag blocking of a converter according to claim 1, wherein: the large end and the small end of the hollow conical cavity are shrinkage holes, and the diameter of the small end is shrunk to be close to zero when the slag blocking cap body is pushed into the inner hole of the steel tapping hole.
3. The metal slag blocking cap for front slag blocking of a converter according to claim 1, wherein: the thickness of the metal sheet is set according to the requirement that the metal sheet can resist slag for 2-3 seconds without melting and can be melted in 1-3 seconds under the action of molten steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223129061.7U CN218910419U (en) | 2022-11-24 | 2022-11-24 | Metal slag blocking cap for front slag blocking of converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223129061.7U CN218910419U (en) | 2022-11-24 | 2022-11-24 | Metal slag blocking cap for front slag blocking of converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218910419U true CN218910419U (en) | 2023-04-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223129061.7U Active CN218910419U (en) | 2022-11-24 | 2022-11-24 | Metal slag blocking cap for front slag blocking of converter |
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| CN (1) | CN218910419U (en) |
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2022
- 2022-11-24 CN CN202223129061.7U patent/CN218910419U/en active Active
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