CN204490931U - It is a kind of that LF-VD is special drags for slag pan - Google Patents
It is a kind of that LF-VD is special drags for slag pan Download PDFInfo
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- CN204490931U CN204490931U CN201520140363.5U CN201520140363U CN204490931U CN 204490931 U CN204490931 U CN 204490931U CN 201520140363 U CN201520140363 U CN 201520140363U CN 204490931 U CN204490931 U CN 204490931U
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- China
- Prior art keywords
- disk body
- refining
- hanger
- slag
- bag
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- Expired - Fee Related
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- 239000002893 slag Substances 0.000 title claims abstract description 45
- 238000007670 refining Methods 0.000 claims abstract description 39
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 abstract description 31
- 239000010959 steel Substances 0.000 abstract description 31
- 238000000034 method Methods 0.000 abstract description 13
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000000465 moulding Methods 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 description 5
- 239000007788 liquid Substances 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000006477 desulfuration reaction Methods 0.000 description 2
- 230000023556 desulfurization Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 206010021143 Hypoxia Diseases 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 241001062472 Stokellia anisodon Species 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003818 cinder Substances 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005261 decarburization Methods 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 238000006356 dehydrogenation reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 208000018875 hypoxemia Diseases 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
Landscapes
- Treatment Of Steel In Its Molten State (AREA)
Abstract
A kind of LF-VD is special drags for slag pan, belongs to LF-VD equipment technical field, for reducing the slag in refining bag.Its technical scheme is: it comprises disk body and hanger, disk body is uniform semicircular arc, two hanger symmetries are fixed on the two ends of disk body diameter, another hanger is positioned at the mid-way of two hangers, three hangers are vertically fixedly connected on the edge of disk body, and the external diameter of disk body and the intracavity diameter of refining bag match.The utility model reduces refining slag layer thickness in refining bag, reduce the labour intensity of workman, improve the production efficiency of VD, ensure that the degassed quality of the refining of molten steel, and greatly reduce in VD treating processes the danger of the slag that overflows, improve the safety coefficient in refining process.Use the average disposable ladle slag blanket amount of refining bag of the present utility model to reduce 60-100mm, the VD production cycle and shorten to original 80%, labor strength and energy-output ratio all can be down to 90% of former frock moulding.
Description
Technical field
The LF-VD that the utility model relates to a kind of smelter external refining use drags for slag pan, belongs to LF-VD equipment technical field.
Background technology
Along with developing rapidly of science and technology, steel performance and quality are more and more taken seriously, and steel product quality mainly comprises cleanliness factor, evenly performance and the high precision of steel.And various external refining mode is just the important measures obtaining high purity, high uniformity and high precision steel.Can smelt by furnace outer refining technology the steel grade to have high quality characteristic and meet actual needs, specific requirement is as follows:
1. accurate control composition is to ensure the stable of mechanical property.
2. reduce sulphur in steel, phosphorus content to improve impact property, anti-stratiform drawing crack performance, red brittleness, and center segregation can be reduced and prevent the surface imperfection of continuously cast bloom.
3. reduce oxygen, hydrogen, nitrogen content in steel and to reduce ultrasonic flaw detection, streak flaw etc., and the tubulation performance of steel can be improved.
4. using advance technology refining liquid steel is to meet the various special requirements to steel quality.Such as, sulfide inclusion form is controlled to prevent lightweight crackle.
5. the shape of inclusion is controlled with the processing characteristics of the deep drawability and steel of improving steel.
6. decarburization is to pole low degree, to improve the deep drawability of steel, electromagnetic performance and corrosion resistance nature.
7. prevent secondary oxidation and the air-breathing again of molten steel, so as not to the effect of external refining all that has been achieved is spoiled.
LF-VD is all the refining units adopted after converter, electric arc furnace etc. just furnace, and LF process mainly completes the intensification of molten steel, deoxidation, desulfurization, goes to be mingled with, the task of alloying adjusting component, evenly molten steel component and temperature; VD process is then a kind of means of vacuum outgas, and major function makes molten steel denitrogenation, dehydrogenation, and further deoxidation, desulfurization, goes to be mingled with.According to the specification of quality of steel, LF or LF-VD refinery practice can be selected, after LF-VD process, can for continuous casting provide composition, temperature accurately, hypoxemia, low-sulfur, to be lowly mingled with, the high quality molten steel of low-gas content.
Terminate in LF process later stage or process, refining slag layer thickness directly affects gas in next step VD treating processes and passes through speed and the volume of slag blanket, greatly affects VD working efficiency and liquid steel degassing quality.Therefore, be necessary the device designing a kind of control LF process later stage refining slag layer thickness, make ladle refining thickness of slag layer meet VD processing requirements.
Utility model content
Technical problem to be solved in the utility model is to provide that a kind of LF-VD is special drags for slag pan, and this slag pan that drags for can reduce ladle refining thickness of slag layer in VD treating processes, reduces equipment electric quantity consumption, improves the production efficiency of VD, ensures the degassed quality of liquid steel refining.
The technical scheme solved the problems of the technologies described above is:
It is a kind of that LF-VD is special drags for slag pan, its formation comprises disk body and hanger, disk body is uniform semicircular arc, semicircular arc opening up, hanger is three, and two hanger symmetries are fixed on the two ends of disk body diameter, another hanger is positioned at the mid-way of two hangers, three hangers are vertically fixedly connected on the edge of disk body, and the external diameter of disk body and the intracavity diameter of refining bag match, and leave uniform gap between disk body edge and refining bag inwall.
Above-mentioned LF-VD is special drags for slag pan, and described hanger is connected with overhead traveling crane by heat-resisting chain, and zygomorphy hanger is connected with overhead traveling crane main hook by heat-resisting chain, and middle hanger is connected with overhead traveling crane auxiliary hook by heat-resisting chain.
The beneficial effects of the utility model are:
Disk body size of the present utility model and refining pouch-type chamber match, when ensureing that disk body can pass in and out refining bag in the horizontal direction smoothly, reduce refining slag layer thickness in refining bag to greatest extent, reduce the labour intensity of workman, improve the production efficiency of VD, ensure that the degassed quality of the refining of molten steel, and greatly reduce in VD treating processes the danger of the slag that overflows, improve the safety coefficient in refining process.Use the average disposable ladle slag blanket amount of refining bag of the present utility model to reduce 60-100mm, the VD production cycle and shorten to original 80%, labor strength and energy-output ratio all can be down to 90% of former frock moulding.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the vertical view of Fig. 1;
Fig. 3 is using state schematic diagram of the present utility model;
Fig. 4 is deslagging schematic diagram of the present utility model.
In figure, mark is as follows: disk body 1, hanger 2, refining bag 3, molten steel 4, slag blanket 5, topple over slag 6.
Embodiment
Formation of the present utility model comprises disk body 1 and hanger 2.
Show in figure, disk body 1 is uniform semicircular arc, semicircular arc opening up, and the external diameter of disk body 1 and the intracavity diameter of refining bag 3 match, and leave uniform gap between disk body 1 edge and refining bag 3 inwall.
Show in figure, hanger 2 is three, and two hanger 2 symmetries are fixed on the two ends of disk body 1 diameter, and another hanger 2 is positioned at the mid-way of two hangers 2, and three hangers 2 are vertically fixedly connected on the edge of disk body 1.Hanger 2 exceeds disk body 1 certain altitude, and thickeies process to three hangers 2, plays and reinforces and the object increased weight.
Show in figure, hanger 2 is connected with overhead traveling crane by heat-resisting chain, and zygomorphy hanger 2 is connected with overhead traveling crane main hook by heat-resisting chain, and middle hanger 2 is connected with overhead traveling crane auxiliary hook by heat-resisting chain, facilitates toppling over of slag.
The material of disk body 1 is HT200, and disk body 1 and hanger 2 size are adjusted accordingly with actual refining bag 3 size.
An embodiment of the present utility model is as follows:
Setting refining bag 3 die cavity diameter 2100mm, drag for slag pan external diameter 1700mm, disk body 1 height 300mm, hanger 2 height 360mm, drags for maximum ga(u)ge 80mm bottom slag pan disk body 1.
Liquid refining slag density 3.6g/mm3, molten steel density 7.3g/mm3, thickness of slag layer is H.
Knownly dragging for slag pan weight m=1.43 ton, volume=0.22m3 by calculating, ladle slag layer thickness can be made at every turn to reduce 63.5mm.
If thickness of slag layer H=250mm, dragging for the buoyancy that slag pan level puts into suffered by refining bag 3 is:
Tons+0.07 ton=1.31 tons, F=F slag+F molten steel=ρ slag V slag+ρ molten steel V molten steel=1.24
Now drag for slag pan weight > buoyancy.
If thickness of slag layer H=200mm, dragging for the buoyancy that slag pan level puts into suffered by refining bag 3 is:
Tons+0.3 ton=1.427 tons, F=F slag+F molten steel=ρ slag V slag+ρ molten steel V molten steel=1.127
Now drag for slag pan weight ≈ buoyancy.
Judge that this drags for slag pan and can use under the condition of refining cinder inclusion layer thickness >=200mm accordingly.
Use the average disposable ladle slag blanket amount of refining bag of the present utility model to reduce 60-100mm, the VD production cycle and shorten to original 80%, labor strength and energy-output ratio all can be down to 90% of former frock moulding.
Claims (2)
1. a LF-VD is special drags for slag pan, it is characterized in that: its formation comprises disk body (1) and hanger (2), disk body (1) is uniform semicircular arc, semicircular arc opening up, hanger (2) is three, two hanger (2) symmetries are fixed on the two ends of disk body (1) diameter, another hanger (2) is positioned at the mid-way of two hangers (2), three hangers (2) are vertically fixedly connected on the edge of disk body (1), the external diameter of disk body (1) and the intracavity diameter of refining bag (3) match, uniform gap is left between disk body (1) edge and refining bag (3) inwall.
2. LF-VD according to claim 1 is special drags for slag pan, it is characterized in that: described hanger (2) is connected with overhead traveling crane by heat-resisting chain, zygomorphy hanger (2) is connected with overhead traveling crane main hook by heat-resisting chain, and middle hanger (2) is connected with overhead traveling crane auxiliary hook by heat-resisting chain.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520140363.5U CN204490931U (en) | 2015-03-12 | 2015-03-12 | It is a kind of that LF-VD is special drags for slag pan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520140363.5U CN204490931U (en) | 2015-03-12 | 2015-03-12 | It is a kind of that LF-VD is special drags for slag pan |
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| Publication Number | Publication Date |
|---|---|
| CN204490931U true CN204490931U (en) | 2015-07-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520140363.5U Expired - Fee Related CN204490931U (en) | 2015-03-12 | 2015-03-12 | It is a kind of that LF-VD is special drags for slag pan |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112570701A (en) * | 2020-12-30 | 2021-03-30 | 湖北楠田工模具科技有限公司 | Quick ladle slag device of ladle molten steel |
-
2015
- 2015-03-12 CN CN201520140363.5U patent/CN204490931U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112570701A (en) * | 2020-12-30 | 2021-03-30 | 湖北楠田工模具科技有限公司 | Quick ladle slag device of ladle molten steel |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150722 |