CN203960255U - The pure calcium core-spun yarn of seamless welding - Google Patents
The pure calcium core-spun yarn of seamless welding Download PDFInfo
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- CN203960255U CN203960255U CN201420389712.2U CN201420389712U CN203960255U CN 203960255 U CN203960255 U CN 203960255U CN 201420389712 U CN201420389712 U CN 201420389712U CN 203960255 U CN203960255 U CN 203960255U
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Abstract
The utility model discloses the pure calcium core-spun yarn of a kind of seamless welding, comprise outer field metal level and the inner pure calcium silk of metal, it is characterized in that: between metal level and the pure calcium silk of inside, protective layer is set; Described protective layer is one deck that silicone oil brushing forms after pure calcium silk surface drying.The pure calcium core-spun yarn of the utility model seamless welding, does not have the coated space of machinery, prevents product oxidation by air inefficacy; Inside is real core, and calcium component is reliable and stable, and can ensure has stable Ca/Al ratio after hello calcium line; Feeding in silk process, feeding compared with under lower velocity, calcium line can reach ladle bottom completely, melts completely, dissolves, and can significantly improve calcium recovery rate, is 3 ~ 5 times of common iron calcium line; And adopt lower wire-feeding velocity, effectively prevent the fatal problem that splash is serious; Can obtain stable superelevation recovery rate, the recovery rate of calcium metal can bring up to 30% ~ 50% from 10% ~ 15% of past; Minimum value is reduced in oxygenation, nitrogen pick-up in calcium treating processes, has also avoided the secondary oxidation of molten steel and air simultaneously.
Description
Technical field
The utility model belongs to the pure calcium core-spun yarn of calcium core-spun yarn, especially seamless welding to external refining deoxidation in smelting process.
Background technology
Calcium treatment technology is a kind of molten steel furnace external refining means that 20 century 70s grow up.Its main purpose: 1 degree of depth reduces the harmful element content such as [O] in steel, [S]; 2 change inclusion composition form, avoid cast aluminum killed steel generation nozzle clogging and improve steel mechanics performance.
In history, once had to directly adding calcium alloy in ladle, to the methods such as calcium alloy of jetting in molten steel, but because treatment effect is unstable or the reason such as high cost is gradually eliminated, application now be that ladle is fed calcium line method.It is that calcium alloy (Ca, Ca-Si, Ca-Fe etc.) sheetmetal parcel is made to cored-wire, by the guide wire of wire feeder, it is inserted to molten steel with very high speed.Feed in silk process and follow stirring of inert gas simultaneously, to increase the residence time and the good mixing of Ca steam bubble in molten steel.This method is widely applied and has obtained howling success in global iron and steel enterprise.The main treatment effect that ladle is fed calcium line has:
1) reduce [S] in molten steel, reduce sulfide inclusion content, finally form CaS and be distributed in steel, in the time of rolling, can not be out of shape.
2) oxide inclusion in molten steel does not form string bunch shape and changes the homodisperse Ca oxide inclusion that contains into, thereby reduces inclusion size, improves molten steel cleanness.
3) in Al killed steel, add Ca, easily Al2O3 is mingled with to liquefy calcium-aluminate, be convenient to its polymerization floating of growing up, thus prevention of immersed nozzle clogging.
But prior art ladle is fed the processing mode of calcium line, what time not enough main existence is following: 1) machinery is coated the aeriferous oxidation deactivation problem in gap, and calcium alloy contacts and causes oxidation deactivation with air; 2) feeding in silk process, because of foreskin box hat easily crush and stiffness inadequate, calcium line can not reach ladle bottom completely, and must adopt high wire-feeding velocity so that splash is serious; 3) in molten steel calcium is processed, the recovery rate of calcium metal is lower, conventionally 10%-15%.Along with improving constantly of liquid steel refining technology, the development of calcium treatment technology, how to improve calcium contents in the recovery rate, stabilized steel of calcium, keep Ca/Al ratio stable in steel, reduce activity time and feed calcium line cost, the quality of stabilized steel better, be applicable to smelt the needs of variety steel, become the fresh target that calcium treatment process is pursued.
Summary of the invention
For the deficiencies in the prior art, the utility model aims to provide the pure calcium core-spun yarn of a kind of seamless welding, to prevent the oxidation deactivation of product and to prevent from producing large vapour pressure after calcium from assembling in molten steel.
In order to solve the problems of the technologies described above, the utility model has adopted following technical scheme:
The pure calcium core-spun yarn of seamless welding, comprises outer field metal level and the inner pure calcium silk of metal, it is characterized in that: between metal level and the pure calcium silk of inside, protective layer is set.
Further feature is: described protective layer is one deck that silicone oil brushing forms after pure calcium silk surface drying.
Described protective layer is after silicone oil mixes with silica flour, is coated in the one deck forming after pure calcium silk surface drying.
Described protective layer is after silica flour, reduced iron powder mix with silicone oil, is coated in the one deck forming after pure calcium silk surface drying.
Mass ratio between silica flour, reduced iron powder is 1:(0.8-1.5).
The pure calcium core-spun yarn of the utility model seamless welding, has following characteristics:
1, the utility model does not have the coated space of machinery, prevents product oxidation by air inefficacy; Inside is real core, and calcium component is reliable and stable, and can ensure has stable Ca/Al ratio after hello calcium line.
2, feeding in silk process, feeding compared with under lower velocity, calcium line can reach ladle bottom completely, melts completely, dissolves, and can significantly improve calcium recovery rate, is 3 ~ 5 times of common iron calcium line; And adopt lower wire-feeding velocity, effectively prevent the fatal problem that splash is serious.
3, can ensure to obtain stable superelevation recovery rate in molten steel calcium is processed, the recovery rate of calcium metal can bring up to 30% ~ 50% from 10% ~ 15% of past.
4, because molten steel splash is controlled, make oxygenation, nitrogen pick-up in calcium treating processes reduce to minimum value, also avoid the secondary oxidation of molten steel and air simultaneously;
5, the consumption of alloy core powder reduces, and reduces and stablized the calcium treatment process time, effectively reduces liquid steel refining cost and quality control cost.
Brief description of the drawings
Fig. 1 is the utility model structural representation.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Described in Fig. 1, the pure calcium core-spun yarn of the utility model seamless welding, comprises outer field metal level 1, and the inner pure calcium silk 2 of metal, and the purity of pure calcium silk 2 is greater than 99%; Between metal level 1 and inner pure calcium silk 2, be protective layer 3, protective layer 3 is very thin one decks that silicone oil brushing forms after pure calcium silk 2 surface dryings, or after silicone oil mixes with silica flour, is coated in the very thin one deck forming after pure calcium silk 2 surface dryings.Metal level 1 adopts Plate Welding to form, or weldless steel tube is welded, and forms seamless welding skin.The blending ratio of silicone oil and silica flour, to form the flow-like of thickness or paste between silica flour and silicone oil as best, is conveniently coated on pure calcium silk 2 surfaces.Protective layer 3 can also be after silica flour, reduced iron powder mix with silicone oil, is coated in the very thin one deck forming after pure calcium silk 2 surface dryings.Mass ratio between silica flour, reduced iron powder, for 1:(0.8-1.5), first silica flour is mixed with reduced iron powder, add again silicone oil, fully be uniformly mixed, obtain the flow-like of thickness or the mixture of paste, then it is upper that this mixture is coated in to pure calcium silk 2 surfaces, dry rear one deck forming.
First protective layer 3 is coated in to pure calcium silk 2 surfaces upper, after being dried, obtains protective layer 3, metal level 1 being set on the pure calcium silk 2 with protective layer 3, form pure calcium core-spun yarn of the present utility model.
The pure calcium core-spun yarn of seamless welding of the present utility model, protective layer 3 is coated in the surface of pure calcium silk 2, has complete protective membrane, forms complete protective layer, and between metal level 1 and pure calcium silk 2, coated space, prevents product oxidation by air inefficacy.
The coated treatment technology of the utility model welding seamless calcium line employing welding, has stopped the oxidation deactivation of product, and can feed under the low speed, can prevent from producing large vapour pressure after calcium from assembling in molten steel the serious splash of effectively having drawn up in conventional calcium line processing.
The utility model welding calcium core-spun yarn and conventional bag heart yearn parameters comparativeanalysis are as shown in Table 2.
Table 1 welds calcium core-spun yarn and conventional bag heart yearn parameters comparativeanalysis
| Cored-wire kind | Si-Ca(60/28) | Fe-Ca(70/30) | Weld pure Ca |
| Ca content (%) | 28 | 30 | 98.5 |
| Pulvis weight (g/m) | 230 | 280 | 54 |
| Ca weight (g/m) | 69 | 84 | 54 |
| Linear diameter (mm) | 13 | 13 | 9.6 |
| Thickness of strips (mm) | 0.4~0.6 | 0.4~0.6 | 1.0~1.5 |
| Wire-feeding velocity (m/min) | 110~130 | 110~160? | 70~110 |
| Ca recovery rate (%) | 6~13 | 8~15 | 30~50 |
Finally it should be noted that, above embodiment is only in order to the technical solution of the utility model to be described but not restriction technologies scheme, although applicant has been described in detail the utility model with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, those are modified to the technical solution of the utility model or are equal to replacement, and do not depart from aim and the scope of the technical program, all should be encompassed in the middle of claim scope of the present utility model.
Claims (5)
1. the pure calcium core-spun yarn of seamless welding, comprises outer field metal level (1) and the inner pure calcium silk of metal (2), it is characterized in that: between metal level (1) and the pure calcium silk (2) of inside, protective layer (3) is set.
2. the pure calcium core-spun yarn of seamless welding according to claim 1, is characterized in that: described protective layer (3) is one deck that silicone oil brushing forms after pure calcium silk (2) surface drying.
3. the pure calcium core-spun yarn of seamless welding according to claim 1, is characterized in that: described protective layer (3) is after silicone oil mixes with silica flour, is coated in the one deck forming after pure calcium silk (2) surface drying.
4. the pure calcium core-spun yarn of seamless welding according to claim 1, is characterized in that: described protective layer (3) is after silica flour, reduced iron powder mix with silicone oil, is coated in the one deck forming after pure calcium silk (2) surface drying.
5. the pure calcium core-spun yarn of seamless welding according to claim 4, is characterized in that: the mass ratio between silica flour, reduced iron powder is 1:(0.8-1.5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201420389712.2U CN203960255U (en) | 2014-07-15 | 2014-07-15 | The pure calcium core-spun yarn of seamless welding |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420389712.2U CN203960255U (en) | 2014-07-15 | 2014-07-15 | The pure calcium core-spun yarn of seamless welding |
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| CN203960255U true CN203960255U (en) | 2014-11-26 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105695662A (en) * | 2015-03-27 | 2016-06-22 | 马鞍山市兴达冶金新材料有限公司 | Production method of passivated pure calcium core-spun yarn |
| CN106636541A (en) * | 2016-09-30 | 2017-05-10 | 秦皇岛首秦金属材料有限公司 | Technology for processing steel liquid calcium by adopting hard high-purity calcium wire |
| CN110616292A (en) * | 2019-04-27 | 2019-12-27 | 河北树航冶金材料有限公司 | Special coated seamless solid pure calcium wire for steelmaking deoxidization and production method thereof |
-
2014
- 2014-07-15 CN CN201420389712.2U patent/CN203960255U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105695662A (en) * | 2015-03-27 | 2016-06-22 | 马鞍山市兴达冶金新材料有限公司 | Production method of passivated pure calcium core-spun yarn |
| CN105695662B (en) * | 2015-03-27 | 2017-06-30 | 马鞍山市兴达冶金新材料有限公司 | A kind of production method for being passivated pure calcium core-spun yarn |
| CN106636541A (en) * | 2016-09-30 | 2017-05-10 | 秦皇岛首秦金属材料有限公司 | Technology for processing steel liquid calcium by adopting hard high-purity calcium wire |
| CN110616292A (en) * | 2019-04-27 | 2019-12-27 | 河北树航冶金材料有限公司 | Special coated seamless solid pure calcium wire for steelmaking deoxidization and production method thereof |
| CN110616292B (en) * | 2019-04-27 | 2021-03-16 | 河北树航冶金材料有限公司 | Special coated seamless solid pure calcium wire for steelmaking deoxidization and production method thereof |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180911 Address after: 401220 Chongqing Changshou District, Jiangnan street, No. three steel road, No. 2 Patentee after: Chongqing Zhongzha Metallurgy Renewable Resources Co., Ltd. Address before: 401258 Chongqing Changshou Economic Zone, Jiangnan street, No. three steel road, No. 2 Patentee before: Chongqing Kejian Metallurgy Material Co., Ltd. |
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| TR01 | Transfer of patent right |