CN108018399A - A kind of deoxidation in steel making seamless high calcium coated thread and preparation method thereof - Google Patents
A kind of deoxidation in steel making seamless high calcium coated thread and preparation method thereof Download PDFInfo
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- CN108018399A CN108018399A CN201711354046.3A CN201711354046A CN108018399A CN 108018399 A CN108018399 A CN 108018399A CN 201711354046 A CN201711354046 A CN 201711354046A CN 108018399 A CN108018399 A CN 108018399A
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- calcium
- steel
- deoxidation
- coated thread
- silk
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- 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
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/06—Deoxidising, e.g. killing
-
- 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
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/0056—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00 using cored wires
-
- 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
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/076—Use of slags or fluxes as treating agents
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The present invention relates to a kind of deoxidation in steel making seamless high calcium coated thread and preparation method thereof.This is seamless, and high calcium coated thread includes the calcium silk set gradually from inside to outside, coats the silicon powder layer of calcium silk, and wraps up the steel bushing of the silicon powder layer.Seamless high calcium coated thread provided by the invention, silica flour clad is provided between inner core calcium silk and outer layer steel bushing, it has very strong affinity with the oxygen in molten steel, field trash, can play the role of cooperateing with deoxidation, removal of impurities with calcium silk, the processing to inclusion content in melting steel is more thorough；Meanwhile the fusing point of silica flour is higher, it can play the role of preventing molten steel heat from inwardly transmitting under the parcel of the steel band of outer layer so that this is seamless, and high calcium coated thread is inserted into ladle more deep position, so as to be conducive to be lifted the recovery rate of calcium.
Description
Technical field
The invention belongs to smelting iron and steel inorganic agent field, and in particular to a kind of deoxidation in steel making with seamless high calcium coated thread and
Its preparation method.
Background technology
Substantial amounts of oxygen occurs during steel smelting, in molten steel, the presence of oxygen can make to produce substantial amounts of bubble in steel billet,
The surface quality and cleanliness factor for causing steel billet are affected.At present, often removed using the method for feeding calcium core-spun yarn in molten steel
Field trash and oxygen, improve the cleanliness factor of molten steel.
Into ladle during line feeding, calcium core-spun yarn is inserted into molten steel by the guide wire of wire feeder with very high speed, but
Due to the fusing point of calcium metal low (845 DEG C), low boiling point (1450 DEG C), easily gasification is floated on slag surface in molten steel, with
Vigorous reaction occurs for the oxide in the oxygen and slag liquid in air, so being needed during line feeding as far as possible that core-spun yarn feeding molten steel is most deep
Place, using the static pressure of molten steel, prevents calcium metal Quick-gasifying, so as to extend residence time of the calcium metal in molten steel, reaches
The effect of Calcium treatment is carried out to molten steel.
The quality of calcium core-spun yarn has important shadow to the depth of core-spun yarn insertion molten steel and deoxidation, removing field trash effect
Ring.Authorization Notice No. be CN203144443U patent disclose a kind of pure calcium core-spun yarn of solid core with powder interlayer, its by
Solid core calcium silk, powder interlayer, steel band are composed, and powder interlayer is provided with steel band, solid core calcium is inlaid with powder interlayer
Silk.Powder interlayer is aluminium powder, AD powder, magnesia powder or calcium oxide powder.Deoxidation of the calcium core-spun yarn to molten steel, removing field trash
Effect is poor, and the depth being inserted into molten steel still has much room for improvement.
The content of the invention
It is an object of the invention to provide a kind of deoxidation in steel making with seamless high calcium coated thread, so as to solve existing calcium core-spun yarn
The problem of existing deoxidation, poor effect of removing field trash.
Second object of the present invention is to provide preparation method of the above-mentioned deoxidation in steel making with seamless high calcium coated thread.
To achieve the above object, the technical solution adopted in the present invention is：
A kind of seamless high calcium coated thread of deoxidation in steel making, including the calcium silk set gradually from inside to outside, coat the silicon of calcium silk
Bisque, and the steel bushing of the parcel silicon powder layer.
The seamless high calcium coated thread of deoxidation in steel making provided by the invention, silicon is provided between inner core calcium silk and outer layer steel bushing
Powder clad, it has very strong affinity with the oxygen in molten steel, field trash, can be played with calcium silk and cooperate with deoxidation, the work of removal of impurities
With the processing to inclusion content in melting steel is more thorough；, can be with the parcel of the steel band of outer layer meanwhile the fusing point of silica flour is higher
Play the role of preventing molten steel heat from inwardly transmitting so that the calcium core-spun yarn is inserted into ladle more deep position, so that favorably
In the recovery rate of lifting calcium.
A diameter of 6.5-8.0mm of the calcium silk, the thickness of the steel bushing is 0.8-1.8mm.Using the thickness range
Calcium silk and steel bushing, the thickness of steel bushing are thicker compared with conventional belt ladle coating (0.5-0.65mm) so that calcium silk in core-spun yarn hundred
Divide than reducing, alleviate the severe degree of reaction, reduce the incidence of secondary infringement, be also beneficial to seamless high calcium coated thread energy
Enough it is inserted into ladle more deep position.
The thickness of the silicon powder layer is 0.4-4mm.The particle diameter of silica flour is not more than 2mm in the silicon powder layer.Silica flour is selected to make
Can avoid that using other silicon-containing alloy powder or mixed powder impurity or pollutant can be introduced into molten steel in line feeding for clad
Problem, is conducive at utmost improve the cleanliness factor of molten steel, while a large number of experiments through inventor confirms, can be maximum using silica flour
Degree reduces heat transfer during line feeding, calcium core-spun yarn is inserted into ladle more deep position.The thickness of silicon powder layer, silica flour
For size controlling in above range, it can be achieved that more preferably wrapping up effect, the combination power between steel bushing, silicon powder layer, inner core is strong, being capable of shape
Integral structure, avoids in line feeding, because silicon powder layer come off it is too fast and caused by calcium recovery rate occur it is fluctuated unstable existing
As.
The steel bushing is seamless steel sleeve.Compared to tightening buckle side (such as background technology is related to the outer steel sleeve of patent) outer steel
Set, seamless steel sleeve can at utmost avoid bringing into for air, while the material uniformity of seamless steel sleeve is good, have higher machinery
Intensity, is not easy to break, and penetration capacity greatly enhances, and is also beneficial to the needs for meeting existing liquid steel refining line feeding depth.Meanwhile adopt
It can at utmost avoid calcium silk from causing to aoxidize with air contact with seamless steel sleeve, be conducive to improve the shelf-life of calcium core-spun yarn.
A diameter of 10-16mm of the seamless high calcium coated thread.
In terms of comprehensive, seamless high calcium coated thread of the invention is the simplest by the setting of inside and outside layers of material, use
Material the Nomenclature Composition and Structure of Complexes designs, and can reach at utmost deoxidation, removal of inclusions, the effect for increasing line feeding depth, meanwhile, should
The introducing of impurity and pollutant when calcium core-spun yarn can avoid line feeding, can effectively improve billet quality, reduce steel-making cost.
Above-mentioned deoxidation in steel making is with technical solution used by the preparation method of seamless high calcium coated thread：
A kind of preparation method of the seamless high calcium coated thread of deoxidation in steel making, including：Silica flour is added between calcium silk and steel band,
Then through being curled into pipe, welding, receiving footpath stretching, to obtain the final product.
The preparation method of the seamless high calcium coated thread of the present invention, in calcium core-spun yarn forming process, has fully taken into account silicon
The distributing homogeneity of bisque and the combination power problem between steel bushing, calcium silk, under above-mentioned optimizing technology parameters, arranged on steel bushing,
Silicon powder layer between calcium silk is tightly combined between three, it is too fast de- not to be had silicon powder layer when to ladle feeding line by squeezed tight
The phenomenon fallen occurs；Meanwhile silica flour can be evenly distributed in core-spun yarn length direction, can avoid in steel-making in use, calcium is received
There is unstable phenomenon fluctuated and occurs in yield, and improves the stability of calcium core-spun yarn in use.
The steel band is 08Al, SPCC strip.The thickness of the steel band is 0.8~1.8mm.
The calcium silk is prepared by following methods：Calcium liquid is made in the refining of calcium ingot, calcium pump is made in calcium liquid afterwards,
Calcium pump is squeezed into silk again, to obtain the final product.In calcium silk manufacturing process, the percentage by weight composition of the calcium liquid is：Ca >=97%, Si≤
0.01%th, N≤0.1%, Ni≤0.10%, Mn≤0.05%, Al≤0.80%, Cu≤0.05%, Mg≤0.80%, Fe≤
0.10%.The density of the calcium silk is 1.53~1.54g/cm3.A diameter of 125mm of the calcium pump, length 400-500mm.
A diameter of 6.5~8.5mm of the calcium silk.Using above-mentioned pure high calcium calcium silk, the introduction volume of impurity can be reduced, is improved to molten steel
Calcium treatment effect.
The preparation method of the seamless high calcium coated thread of the present invention, is set by the technique for loading silica flour between steel bushing, calcium silk
Meter, improves the combination power between steel bushing, silicon powder layer, calcium silk, makes silica flour more uniformly spreading in calcium filament length degree and radially,
The cladding quality of calcium core-spun yarn is improved, overcomes the fluctuation of calcium recovery rate in steelmaking process.
Embodiment
Embodiments of the present invention are described further with reference to specific embodiment.In following embodiments, calcium silk is adopted
Prepared with following steps：After calcium ingot raw material is removed appearance oxide layer impurity, put into kier and be heated to the fusing of calcium block, remove
Impurity, is refined into the calcium liquid of following percentage by weight composition：Ca >=97%, Si≤0.01%, N≤0.1%, Ni≤0.10%,
Mn≤0.05%, Al≤0.80%, Cu≤0.05%, Mg≤0.80%, Fe≤0.10%；Then calcium liquid is made a diameter of
Metal calcium pump, is extruded into the gold of a diameter of 6.5-8.0mm by 125mm, the metal calcium pump that length is 400-500mm through extruder afterwards
Belong to calcium silk.
Embodiment 1
The seamless high calcium coated thread of the deoxidation in steel making of the present embodiment, including the calcium silk set gradually from inside to outside, coat calcium
The silicon powder layer of silk, and the steel bushing of the parcel silicon powder layer.A diameter of 6.5mm of calcium silk, the thickness of silicon powder layer are 0.95mm, steel
Cover for 08Al steel, thickness 0.8mm.
The deoxidation in steel making of the present embodiment preparation method of seamless high calcium coated thread, is prepared using following steps：
Silica flour is added between calcium silk and 08Al steel bands, the pipe that caliber is 13mm is curled into through shaping machine set, is then welded through high-frequency induction welder
Seamless steel sleeve is connected into, enters back into and receives footpath stretching unit, receive the core-spun yarn that footpath is a diameter of 10mm.
Embodiment 2
The seamless high calcium coated thread of the deoxidation in steel making of the present embodiment, including the calcium silk set gradually from inside to outside, coat calcium
The silicon powder layer of silk, and the steel bushing of the parcel silicon powder layer.A diameter of 6.5mm of calcium silk, the thickness of silicon powder layer are 2.25mm, steel
Cover for 08Al steel, thickness 1.0mm.
The deoxidation in steel making of the present embodiment preparation method of seamless high calcium coated thread, is prepared using following steps：
Silica flour is added between calcium silk and 08Al steel bands, the pipe that caliber is 15mm is curled into through shaping machine set, is then welded through high-frequency induction welder
Seamless steel sleeve is connected into, enters back into and receives footpath stretching unit, receive the core-spun yarn that footpath is a diameter of 13mm.
Embodiment 3
The seamless high calcium coated thread of the deoxidation in steel making of the present embodiment, including the calcium silk set gradually from inside to outside, coat calcium
The silicon powder layer of silk, and the steel bushing of the parcel silicon powder layer.A diameter of 8.0mm of calcium silk, the thickness of silicon powder layer are 2.2mm, steel
Cover for 08Al steel, thickness 1.8mm.
The deoxidation in steel making of the present embodiment preparation method of seamless high calcium coated thread, is prepared using following steps：
Silica flour is added between calcium silk and 08Al steel bands, the pipe that caliber is 18mm is curled into through shaping machine set, is then welded through high-frequency induction welder
Seamless steel sleeve is connected into, enters back into and receives footpath stretching unit, receive the core-spun yarn that footpath is a diameter of 16mm.
In the other embodiment of deoxidation in steel making of the invention with seamless high calcium coated thread, steel bushing can use SPCC strips,
The method for referring to embodiment 1 prepares corresponding seamless high calcium coated thread product.
Test example
The application effect of the seamless high calcium coated thread of this test example detection embodiment 1.In certain steel mill, Application Example 1
Seamless high calcium coated thread carries out external refining to Calcium treatment aluminium-silicon killed steel, tests volume 5 altogether, about 4000 meters of lengths per roll of tape, is often rolled up
Weight about 2000kg, test data are as shown in table 1.
The real application data of the seamless high calcium coated thread of 1 embodiment 1 of table
As shown in Table 1, the population mean recovery rate of the seamless high calcium coated thread of embodiment 1 is 29.66%, and
Recovery rate is ideal under the speed of 280m/min, while shortens processing time.Using smooth on the wire feeder of Affival,
There is no the phenomenon of card silk, fracture of wire, feed the silk time has shortened to 2min by 5min, and molten steel is without splash, no safety wind during use
Danger.
The seamless high calcium coated thread of embodiment 1 and the comparing result of other silicon-calcium wire kinds are as shown in table 2, wherein seamed pure
Calcium line is the core-spun yarn of patent involved by background technology, and the inner core of silicon-calcium wire is calcium-silicon, then wraps up inner core, calcium iron with steel band
The inner core of line is calcium grain and iron powder, and structure is identical with silicon-calcium wire.
The line feeding effect and calcium recovery rate of the different core-spun yarns of table 2 compare
| Kind | Dosage (rice) | Wire-feeding velocity (meter per second) | Calcium recovery rate (%) |
| Embodiment 1 | 130 | 4 | 25-35 |
| Seamed pure calcium line | 180 | 2.5 | 20-25 |
| Silicon-calcium wire | 300 | 3 | 10-15 |
| Calcium iron wire | 350 | 3 | 8-12 |
By table 2 results showed that embodiment 1 core-spun yarn using less dosage be can reach steel refining need
Ask, calcium recovery rate reaches 25-35%, compared with existing core-spun yarn, realizes high calcium recovery rate, significantly reduce steel-making into
This, improves Cleanliness of Molten Steel.
Claims (10)
1. the seamless high calcium coated thread of a kind of deoxidation in steel making, it is characterised in that including the calcium silk set gradually from inside to outside, parcel
Silicon powder layer outside the calcium silk, and the steel bushing being wrapped in outside the silicon powder layer.
2. the seamless high calcium coated thread of deoxidation in steel making as claimed in claim 1, it is characterised in that the calcium silk it is a diameter of
6.5-8.0mm。
3. the seamless high calcium coated thread of deoxidation in steel making as claimed in claim 1 or 2, it is characterised in that the thickness of the steel bushing
For 0.8-1.8mm.
4. the seamless high calcium coated thread of deoxidation in steel making as claimed in claim 1, it is characterised in that the thickness of the silicon powder layer is
0.4-4mm。
5. the seamless high calcium coated thread of deoxidation in steel making as described in claim 1 or 4, it is characterised in that silicon in the silicon powder layer
The particle diameter of powder is not more than 2mm.
6. the seamless high calcium coated thread of deoxidation in steel making as claimed in claim 1 or 2, it is characterised in that the core-spun yarn it is straight
Footpath is 10-16mm.
A kind of 7. preparation method of the seamless high calcium coated thread of deoxidation in steel making as claimed in claim 1, it is characterised in that bag
Include：Silica flour is added between calcium silk and steel band, then through being curled into pipe, welding, receiving footpath stretching, to obtain the final product.
8. the deoxidation in steel making as claimed in claim 7 preparation method of seamless high calcium coated thread, it is characterised in that the steel band
For 08Al or SPCC strips.
9. the deoxidation in steel making as claimed in claim 7 preparation method of seamless high calcium coated thread, it is characterised in that the calcium silk
It is prepared by following methods：Calcium liquid is made in the refining of calcium ingot, calcium pump is made in calcium liquid afterwards, then calcium pump is squeezed into
Silk, to obtain the final product.
10. the deoxidation in steel making as claimed in claim 9 preparation method of seamless high calcium coated thread, it is characterised in that the calcium
The percentage by weight of liquid forms：Ca >=97%, Si≤0.01%, N≤0.1%, Ni≤0.10%, Mn≤0.05%, Al≤
0.80%th, Cu≤0.05%, Mg≤0.80%, Fe≤0.10%.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711354046.3A CN108018399A (en) | 2017-12-15 | 2017-12-15 | A kind of deoxidation in steel making seamless high calcium coated thread and preparation method thereof |
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| CN201711354046.3A CN108018399A (en) | 2017-12-15 | 2017-12-15 | A kind of deoxidation in steel making seamless high calcium coated thread and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114199643A (en) * | 2021-11-18 | 2022-03-18 | 南京钢铁股份有限公司 | Sample preparation and analysis method for primary and secondary components of seamless calcium-silicon core-spun yarn |
| CN115449599A (en) * | 2022-10-11 | 2022-12-09 | 安徽富凯特材有限公司 | Molten steel calcium deoxidation method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102559997A (en) * | 2012-01-10 | 2012-07-11 | 周海涛 | Seamless solid metal calcium cored wire for steelmaking and deoxidation and preparation method thereof |
| CN102586542A (en) * | 2012-04-10 | 2012-07-18 | 上海马腾新型材料厂 | Metal calcium core composite cored wire and preparation method thereof |
| CN104789737A (en) * | 2015-05-04 | 2015-07-22 | 罗文斌 | Preparing method of injection type seamless pure-calcium core spun yarn for steel smelting and deoxygenation |
-
2017
- 2017-12-15 CN CN201711354046.3A patent/CN108018399A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102559997A (en) * | 2012-01-10 | 2012-07-11 | 周海涛 | Seamless solid metal calcium cored wire for steelmaking and deoxidation and preparation method thereof |
| CN102586542A (en) * | 2012-04-10 | 2012-07-18 | 上海马腾新型材料厂 | Metal calcium core composite cored wire and preparation method thereof |
| CN104789737A (en) * | 2015-05-04 | 2015-07-22 | 罗文斌 | Preparing method of injection type seamless pure-calcium core spun yarn for steel smelting and deoxygenation |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114199643A (en) * | 2021-11-18 | 2022-03-18 | 南京钢铁股份有限公司 | Sample preparation and analysis method for primary and secondary components of seamless calcium-silicon core-spun yarn |
| CN115449599A (en) * | 2022-10-11 | 2022-12-09 | 安徽富凯特材有限公司 | Molten steel calcium deoxidation method |
| CN115449599B (en) * | 2022-10-11 | 2023-09-19 | 安徽富凯特材有限公司 | Molten steel calcium deoxidization method |
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