CN101328528A - Core-spun yarn for producing ultra-low phosphorus steel by external refining dephosphorization and preparation method thereof - Google Patents
Core-spun yarn for producing ultra-low phosphorus steel by external refining dephosphorization and preparation method thereof Download PDFInfo
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- CN101328528A CN101328528A CNA2008100120830A CN200810012083A CN101328528A CN 101328528 A CN101328528 A CN 101328528A CN A2008100120830 A CNA2008100120830 A CN A2008100120830A CN 200810012083 A CN200810012083 A CN 200810012083A CN 101328528 A CN101328528 A CN 101328528A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 58
- 239000010959 steel Substances 0.000 title claims abstract description 58
- 238000002360 preparation method Methods 0.000 title claims abstract description 5
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 title abstract description 24
- 229910052698 phosphorus Inorganic materials 0.000 title abstract description 24
- 239000011574 phosphorus Substances 0.000 title abstract description 24
- 238000007670 refining Methods 0.000 title abstract description 12
- 239000000292 calcium oxide Substances 0.000 claims abstract description 40
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims abstract description 40
- 239000000203 mixture Substances 0.000 claims abstract description 40
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims abstract description 31
- 230000004907 flux Effects 0.000 claims abstract description 28
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 claims abstract description 22
- 239000001095 magnesium carbonate Substances 0.000 claims abstract description 22
- 229910000021 magnesium carbonate Inorganic materials 0.000 claims abstract description 22
- 238000002156 mixing Methods 0.000 claims abstract description 15
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 claims abstract description 14
- 229910001634 calcium fluoride Inorganic materials 0.000 claims abstract description 14
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 13
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 13
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000002994 raw material Substances 0.000 claims abstract description 11
- 239000011230 binding agent Substances 0.000 claims abstract description 9
- 235000012204 lemonade/lime carbonate Nutrition 0.000 claims description 20
- 235000014380 magnesium carbonate Nutrition 0.000 claims description 20
- 229960001708 magnesium carbonate Drugs 0.000 claims description 20
- 238000009472 formulation Methods 0.000 claims description 18
- 239000000843 powder Substances 0.000 claims description 18
- 238000001035 drying Methods 0.000 claims description 11
- 230000000694 effects Effects 0.000 claims description 10
- 229910000975 Carbon steel Inorganic materials 0.000 claims description 9
- 239000010962 carbon steel Substances 0.000 claims description 9
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 239000004927 clay Substances 0.000 claims description 4
- 235000019353 potassium silicate Nutrition 0.000 claims description 4
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 4
- 239000011398 Portland cement Substances 0.000 claims description 3
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 3
- 229910004261 CaF 2 Inorganic materials 0.000 claims description 2
- 235000021050 feed intake Nutrition 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 21
- 238000003723 Smelting Methods 0.000 abstract description 10
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 229910000677 High-carbon steel Inorganic materials 0.000 abstract description 2
- 229910001209 Low-carbon steel Inorganic materials 0.000 abstract description 2
- 229910000742 Microalloyed steel Inorganic materials 0.000 abstract description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 abstract 4
- 229910000019 calcium carbonate Inorganic materials 0.000 abstract 2
- 230000007547 defect Effects 0.000 abstract 1
- 239000002356 single layer Substances 0.000 abstract 1
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 18
- 229910052786 argon Inorganic materials 0.000 description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- 238000010079 rubber tapping Methods 0.000 description 8
- 239000002245 particle Substances 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 6
- 239000002893 slag Substances 0.000 description 5
- 229910052742 iron Inorganic materials 0.000 description 4
- 230000007812 deficiency Effects 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 238000009749 continuous casting Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000005204 segregation Methods 0.000 description 2
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 241001062472 Stokellia anisodon Species 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 229910000963 austenitic stainless steel Inorganic materials 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
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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
- Y02P10/20—Recycling
Landscapes
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The invention relates to a control process for phosphorus in production of ultra-low phosphorus steel by microalloy steel, high carbon steel and special steel, in particular to a cored wire for production of ultra-low phosphorus steel by external refining dephosphorization and a preparation method thereof. The core of the cored wire is prepared by mixing the raw materials according to a formula, respectively taking a dephosphorization flux, calcium fluoride, calcium carbonate or magnesium carbonate or a mixture of the calcium carbonate and the magnesium carbonate, calcium oxide or magnesium oxide or a mixture of the calcium oxide and the magnesium oxide and a binder, taking low-carbon steel strips with the thickness of 2-5 mm as a sheath, and adopting a single-layer steel lap joint type wire making machine to prepare the cored wire. The invention has the advantages of scientific formula, simple and reasonable process, high efficiency, stability and short time, and the application proves that the invention can realize the rapid refining dephosphorization of the molten steel until the phosphorus content is lower than 0.0030 percent. Makes up the defect that the phosphorus content in steel is less than 0.01 percent which is difficult to achieve by the conventional converter smelting, and can meet the requirements of different molten steel on the phosphorus content. Greatly improves the quality of the refined steel and reduces the smelting cost.
Description
Technical field
The present invention relates to a kind of micro-alloyed steel, high carbon steel and special steel and produce the CONTROL PROCESS of the phosphorus in the ultra-low phosphoretic steel, particularly a kind of cored-wire and method for making thereof that is used for manufacturing ultra-low phosphoretic steel with outside-stove refining dephosphorization the invention belongs to metallurgical technology field.
Background technology
As everyone knows, phosphorus is controlled as harmful element in steel usually.Because the segregation of phosphorus in steel is more serious, steel toughness is degenerated, produce " cold short " phenomenon, especially under cold condition, easier generation " cold short ", the segregation of phosphorus also can cause the anisotropy of steel, reduce welding property, cause stainless corrosion fatigue.Along with rapid development of science and technology, the metallurgical quality of senior high-quality steel to steel material requires to improve constantly, and especially the phosphorus content in the steel is constantly proposed requirements at the higher level.Phosphorus content is less than 0.01% even 0.005% in some Cryogenic Steel, marine steel, anti-hydrogen crackle steel and the part Plate Steel requirement steel; In order to prevent that austenitic stainless steel from producing stress corrosion cracking, require in the steel phosphorus less than 0.005%.For this reason, steel mill is poured into the method for proceeding to smelt in another block converter after adopting " double slag process " promptly to adopt twice slag making or " duplex practice " promptly to take a block converter with the molten iron smelting half the time mostly in converter smelting at present, the deficiency of these two kinds of methods is complex process, tap to tap time is long, and converter productivity can not be not fully exerted; Also having a kind of mode is that molten iron is carried out " three take off " in advance is desiliconization, desulfurization, dephosphorization, iron and steel enterprise as Japan, its deficiency is need be many with equipment, investment is big, complex procedures, heat waste is big and because the molten iron temperature after " three take off " is low, the steel scrap amount that adds when making converter smelting significantly reduces.Therefore, in order to produce these low-phosphorous, ultra-low phosphoretic steels, conventional converter smelting can not satisfy the requirement of these steel grades to phosphorus, thus demand studying auxiliary method of coming dephosphorization urgently with external refining, thus realize producing ultra-low phosphoretic steel.
Summary of the invention
The present invention be directed to that above-mentioned problems of the prior art propose, its objective is provides in the stable control of a kind of energy molten steel phosphorus content below 0.0030%, effect obviously, stablize, guarantee and improves the quality of refining steel, the cored-wire that is used for manufacturing ultra-low phosphoretic steel with outside-stove refining dephosphorization of reduction smelting cost.
In order to solve the problems of the technologies described above, the present invention is achieved in that the cored-wire that is used for producing ultra-low phosphoretic steel by molten steel dephosphorising outside furnace, its core be by following raw materials by weight through being prepared from:
Dephosphorising flux 1～70%
The mixture 1～60% of lime carbonate, magnesiumcarbonate or lime carbonate and magnesiumcarbonate
Calcium oxide, magnesium oxide or calcium oxide and magnesian mixture 10～98%
Calcium Fluoride (Fluorspan) 0～40%
Binding agent 0～20%
Described cored-wire, core be by following raw materials by weight through being prepared from:
Dephosphorising flux 5～65%
The mixture 2～55% of lime carbonate, magnesiumcarbonate or lime carbonate and magnesiumcarbonate
Calcium oxide, magnesium oxide or calcium oxide and magnesian mixture 15～85%
Calcium Fluoride (Fluorspan) 2～35%
Binding agent 0～20%
Described cored-wire, its core be by following raw materials by weight through being prepared from:
Dephosphorising flux 10～35%
The mixture 10～45% of lime carbonate, magnesiumcarbonate or lime carbonate and magnesiumcarbonate
Calcium oxide, magnesium oxide or calcium oxide and magnesian mixture 30～70%
Calcium Fluoride (Fluorspan) 5～30%
Binding agent 5～15%
Described binding agent is any one or a two or more mixture in clay, Portland cement, wilkinite, the water glass.
The granularity of described raw material is at 1mm～3.5mm, wherein calcium oxide, magnesian activity 〉=200ml.
Described Dephosphorising flux by following raw materials by weight through being prepared from:
CaO 20～80％
FeO 10～50％
CaF
2 20～40％
Prepare the method for described cored-wire, may further comprise the steps:
A, feed intake, batch mixing
Get the Dephosphorising flux that granularity is 1nm～3.5mm respectively by formulation ratio; Calcium Fluoride (Fluorspan); The mixture of lime carbonate, magnesiumcarbonate or lime carbonate and magnesiumcarbonate; Calcium oxide, magnesium oxide or calcium oxide and magnesian mixture and tackiness agent go into to carry out batch mixing, mixing time 1h～8h in the blender;
B, oven dry are handled
Dry in 80 ℃～200 ℃ drying plants, the time is 2h～24h, is the formulation of pulvis;
C, system cored-wire
Above-mentioned core powder after drying is handled is a crust with the thick mild-carbon steel strip of 2～5mm, adopts individual layer steel band lapping type to make cored-wire on twine machine, and envelope curve speed is 8～30m/min, and core powder content is at 100～240g/m.
The present invention owing to scientific formulation is reasonable, and proves through application that compared with prior art cored-wire of the present invention has dephosphorization efficient height, stable, time weak point, can realize that the quick refining dephosphorization of molten steel to phosphorus content is lower than 0.0030%; Simultaneously, preparation technology is simple, flexible, convenient, is beneficial to application.Remedied conventional converter smelting and be difficult to reach phosphorus content in the steel, can satisfy of the requirement of different molten steel phosphorus content less than 0.01% deficiency.The quality that improves concise steel reduces smelting cost.
Embodiment
Below in conjunction with specific embodiment the present invention is further elaborated, but protection scope of the present invention is not limited by specific embodiment, is as the criterion with claims.In addition, with under the prerequisite of technical solution of the present invention, any change or change that those of ordinary skills that the present invention did are realized easily all will fall within the claim scope of the present invention.
Embodiment 1
Dephosphorising flux is got CaO powder 50kg, FeO powder 30kg, CaF by formulation ratio
2Powder 20kg puts into that blender carries out even batch mixing, fragmentation rolls and the air-flow micronizer grind be prepared from standby; Getting its particle diameter respectively by formulation ratio again is that Dephosphorising flux powder 35kg, calcium fluoride powder 5kg, calcium oxide powder 55kg, the lime carbonate 5kg of 1nm～3.5mm goes into to carry out even batch mixing 1～8h in the vertical blender, wherein said calcium oxide, magnesian activity 〉=200ml; The powder for preparing is gone into 80～200 ℃ of drying plants dries 10h～22h and is pulvis.With thickness is the crust of the common low carbon steel band of 2mm～5mm as cored-wire, core is to pass through the above-mentioned pulvis of oven dry on twine machine, adopt individual layer steel band lapping type system cored-wire, envelope curve speed is 8～30m/min, and cored-wire pulvis content is at 100～240g/m, dress up 1000～2000m/ volume, be beneficial to control add-on and adding speed in the use, the cross section of cored-wire is circular, and packing will be guaranteed good seal, prevent humidity, and in 20 days, use.
Embodiment 2
Get CaO 20kg, FeO 50kg, CaF by formulation ratio
230kg prepares Dephosphorising flux, and its method is with embodiment 1; Getting its particle diameter respectively by formulation ratio again is that the Dephosphorising flux 1kg for preparing, magnesium oxide 98kg, the magnesiumcarbonate 1kg of 1nm～3.5mm goes into to carry out even batch mixing 1～8h in the vertical blender, wherein said calcium oxide, magnesian activity 〉=200ml; The powder for preparing is gone into 100～150 ℃ of drying plants dries 10h～22h and is pulvis, with thickness is the crust of the mild-carbon steel strip of 2mm as cored-wire, core for through the above-mentioned pulvis of oven dry on twine machine, adopt individual layer steel band lapping type system cored-wire, other is with embodiment 1.
Embodiment 3
Get CaO 80kg, FeO 10kg, CaF by formulation ratio
210kg prepares Dephosphorising flux, and its method is with embodiment 1; Getting its particle diameter respectively by formulation ratio again is that mixture 30kg (both proportionings are not strict with), calcium oxide and magnesian mixture 10kg, the wilkinite 15kg of the Dephosphorising flux 45kg, lime carbonate and the magnesiumcarbonate that prepare of 1nm～3.5mm goes into to carry out even batch mixing 1～8h in the vertical blender, wherein said calcium oxide, magnesian activity 〉=200ml; The powder for preparing is gone into 70～180 ℃ of drying plants dries 10h～20h and is pulvis, with thickness is the crust of the mild-carbon steel strip of 2.5mm as cored-wire, core for through the above-mentioned pulvis of oven dry on twine machine, adopt individual layer steel band lapping type system cored-wire, other is with embodiment 1.
Embodiment 4
Get CaO 60kg, FeO 20kg, CaF by formulation ratio
220kg prepares Dephosphorising flux, and its method is with embodiment 1; Getting its particle diameter respectively by formulation ratio again is that the Dephosphorising flux 60kg for preparing, Calcium Fluoride (Fluorspan) 10kg, lime carbonate 1kg, magnesium oxide 25kg, the clay 4kg of 1nm～3.5mm goes into to carry out even batch mixing 1～8h in the vertical blender, wherein said calcium oxide, magnesian activity 〉=200ml; The powder for preparing is gone into 90～160 ℃ of drying plants dries 10h～15h and is pulvis, with thickness is the crust of the mild-carbon steel strip of 5mm as cored-wire, core for through the above-mentioned pulvis of oven dry on twine machine, adopt individual layer steel band lapping type system cored-wire, other is with embodiment 1.
Embodiment 5
Get CaO 35kg, FeO 45kg, CaF by formulation ratio
220kg prepares Dephosphorising flux, and its method is with embodiment 1; Getting its particle diameter respectively by formulation ratio again is that the Dephosphorising flux 3kg for preparing, Calcium Fluoride (Fluorspan) 2kg, lime carbonate 10kg, the magnesium oxide 85kg of 1nm～3.5mm goes into to carry out even batch mixing 1～8h in the vertical blender, wherein said calcium oxide, magnesian activity 〉=200ml; The powder for preparing is gone into 80～180 ℃ of drying plants dries 10h～16h and is pulvis, with thickness is the crust of the mild-carbon steel strip of 4mm as cored-wire, core for through the above-mentioned pulvis of oven dry on twine machine, adopt individual layer steel band lapping type system cored-wire, other is with embodiment 1.
Embodiment 6
Get CaO 50kg, FeO 40kg, CaF by formulation ratio
210kg prepares Dephosphorising flux, and its method is with embodiment 1; Getting its particle diameter respectively by formulation ratio again is that the Dephosphorising flux 12kg for preparing, Calcium Fluoride (Fluorspan) 18kg, magnesiumcarbonate 45kg, calcium oxide 15kg, clay 6kg, the water glass 4kg of 1nm～3.5mm goes into to carry out even batch mixing 1～8h in the vertical blender, wherein said calcium oxide, magnesian activity 〉=200ml; The powder for preparing is gone into 90～170 ℃ of drying plants dries 10h～20h and is pulvis, with thickness is the crust of the mild-carbon steel strip of 3mm as cored-wire, core for through the above-mentioned pulvis of oven dry on twine machine, adopt individual layer steel band lapping type system cored-wire, other is with embodiment 1.
Embodiment 7
By formulation ratio get CaO 70kg, FeO 30kg prepares Dephosphorising flux, its method is with embodiment 1; Getting its particle diameter respectively by formulation ratio again is that the Dephosphorising flux 12kg for preparing, Calcium Fluoride (Fluorspan) 18kg, magnesiumcarbonate 45kg, calcium oxide 15kg, Portland cement 6kg, the water glass 4kg of 1nm～3.5mm goes into to carry out even batch mixing 1～8h in the vertical blender, wherein said calcium oxide, magnesian activity 〉=200ml; The powder for preparing is gone into 100～150 ℃ of drying plants dries 10h～17h and is pulvis, with thickness is the crust of the mild-carbon steel strip of 3.5mm as cored-wire, core for through the above-mentioned pulvis of oven dry on twine machine, adopt individual layer steel band lapping type system cored-wire, other is with embodiment 1.
Application Example:
The converter tapping temperature is at 1550 ℃～1660 ℃, and phosphorus is controlled at below 0.02% during tapping; Floating plug pushing off the slag processing, not deoxidation are adopted in tapping; Flow to steel during tapping and add Dephosphorising flux in the ladle, its add-on is 5～20kg/t, being divided into twice adds, described Dephosphorising flux in tapping one half adding 1/3, when will finishing, tapping adds 2/3 remaining Dephosphorising flux, molten steel is carried out Argon stir, the flow of argon gas is 50～300Nl/min, and argon blowing time is 0.1～10min; After Argon finishes, adopt line feeding technology that cored-wire is fed in the molten steel, the line feeding process stops Argon and stirs, wire-feeding velocity is at 180～350m/min, feed quantity is at 0.5～3.5kg/t, static 0.1～10min after the line feeding, and back Argon is gently handled and is stirred, the flow of argon gas is 50～280Nl/min, and weak argon blowing time is 0.1～5min; After Argon stirs and finishes, adopt vacuum slag absorbing machine to skim at the station of skimming earlier, add ladle covering agent then, the add-on of insulating covering agent is controlled at 0.1～1.5kg/t; Carry out heated and stirred at refining furnace, the molten steel heating and temperature control is at 1580～1620 ℃; Deoxidation, alloying refining treatment; Continuous casting adopts the whole process protection cast, when continuous casting, enters into the packet generation rephosphorization in order to prevent ladle slag, and the molten steel in the big bag will be reserved 1～2 ton.
The application method that adopts the above embodiment of the present invention 1,2 and 3 to be used for manufacturing ultra-low phosphoretic steel with outside-stove refining dephosphorization has carried out smelting test, according to the difference of tapping end phosphorus content, and dephosphorization amount difference, dephosphorization rate is more than 60%; Phosphorus content the results are shown in Table 1 below 0.0030% in the molten steel.
Table 1
| Tapping end phosphorus content (wt.%) | Phosphorus content behind the dephosphorization (wt%) | Dephosphorization rate (%) | |
| Embodiment 1 | 0.015 | 0.0023 | 84.67 |
| Embodiment 2 | 0.012 | 0.0025 | 79.17 |
| Embodiment 3 | 0.010 | 0.0030 | 70.00 |
Claims (8)
1, the cored-wire that is used for producing ultra-low phosphoretic steel by molten steel dephosphorising outside furnace, the core that it is characterized in that cored-wire be by following raw materials by weight through being prepared from:
Dephosphorising flux 1～70%
The mixture 1～60% of lime carbonate, magnesiumcarbonate or lime carbonate and magnesiumcarbonate
Calcium oxide, magnesium oxide or calcium oxide and magnesian mixture 10～98%
Calcium Fluoride (Fluorspan) 0～40%
Binding agent 0～20%
2, cored-wire according to claim 1, the core that it is characterized in that cored-wire be by following raw materials by weight through being prepared from:
Dephosphorising flux 5～65%
The mixture 2～55% of lime carbonate, magnesiumcarbonate or lime carbonate and magnesiumcarbonate
Calcium oxide, magnesium oxide or calcium oxide and magnesian mixture 15～85%
Calcium Fluoride (Fluorspan) 2～35%
Binding agent 0～20%
3, cored-wire according to claim 1, the core that it is characterized in that cored-wire be by following raw materials by weight through being prepared from:
Dephosphorising flux 10～35%
The mixture 10～45% of lime carbonate, magnesiumcarbonate or lime carbonate and magnesiumcarbonate
Calcium oxide, magnesium oxide or calcium oxide and magnesian mixture 30～70%
Calcium Fluoride (Fluorspan) 5～30%
Binding agent 5～15%
4,, it is characterized in that described binding agent is any one or a two or more mixture in clay, Portland cement, wilkinite, the water glass according to claim 1,2 or 3 described cored-wires.
5, according to claim 1,2 or 3 described cored-wires, the granularity that it is characterized in that described raw material is at 1nm～3.5mm, wherein calcium oxide, magnesian activity 〉=200ml.
6, according to claim 1,2 or 3 described cored-wires, it is characterized in that described Dephosphorising flux be by following raw materials by weight through being prepared from:
CaO 20～80％
FeO 10～50％
CaF
2 0～40％
7,, it is characterized in that described cored-wire crust is a mild-carbon steel strip according to claim 1,2 or 3 described cored-wires.
8, the preparation method of the described cored-wire of preparation claim 1 may further comprise the steps:
A, feed intake, batch mixing
Get the Dephosphorising flux that its granularity is 1nm～3.5mm by formulation ratio; Calcium Fluoride (Fluorspan); The mixture of lime carbonate, magnesiumcarbonate or lime carbonate and magnesiumcarbonate; Calcium oxide, magnesium oxide or calcium oxide and magnesian mixture and tackiness agent go into to carry out batch mixing, mixing time 1h～8h in the blender;
B, oven dry are handled
Dry in 80 ℃～200 ℃ drying plants, the time is 2h～24h, is the core powder of cored-wire;
C, system cored-wire
Above-mentioned core powder after drying is handled is a crust with the thick mild-carbon steel strip of 2～5mm, adopts individual layer steel lapping type to make cored-wire on twine machine, and envelope curve speed is 8～30m/min, and core powder content is at 100～240g/m.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100120830A CN101328528A (en) | 2008-06-30 | 2008-06-30 | Core-spun yarn for producing ultra-low phosphorus steel by external refining dephosphorization and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100120830A CN101328528A (en) | 2008-06-30 | 2008-06-30 | Core-spun yarn for producing ultra-low phosphorus steel by external refining dephosphorization and preparation method thereof |
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| CN101328528A true CN101328528A (en) | 2008-12-24 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102094100A (en) * | 2011-03-18 | 2011-06-15 | 武汉钢铁(集团)公司 | Molten iron dephosphorizing agent and application method thereof |
| CN109280745A (en) * | 2018-10-31 | 2019-01-29 | 首钢集团有限公司 | A kind of convertor steelmaking process dephosphorization core-spun yarn |
-
2008
- 2008-06-30 CN CNA2008100120830A patent/CN101328528A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102094100A (en) * | 2011-03-18 | 2011-06-15 | 武汉钢铁(集团)公司 | Molten iron dephosphorizing agent and application method thereof |
| CN102094100B (en) * | 2011-03-18 | 2012-05-23 | 武汉钢铁(集团)公司 | Molten iron dephosphorizing agent and application method thereof |
| CN109280745A (en) * | 2018-10-31 | 2019-01-29 | 首钢集团有限公司 | A kind of convertor steelmaking process dephosphorization core-spun yarn |
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