CN105483501A - Smelting method of phosphorus-containing ultra-low carbon steel - Google Patents
Smelting method of phosphorus-containing ultra-low carbon steel Download PDFInfo
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- CN105483501A CN105483501A CN201410483658.2A CN201410483658A CN105483501A CN 105483501 A CN105483501 A CN 105483501A CN 201410483658 A CN201410483658 A CN 201410483658A CN 105483501 A CN105483501 A CN 105483501A
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- steel
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- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000003723 Smelting Methods 0.000 title claims abstract description 23
- 229910001209 Low-carbon steel Inorganic materials 0.000 title claims abstract description 17
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 title abstract 2
- 229910052698 phosphorus Inorganic materials 0.000 title abstract 2
- 239000011574 phosphorus Substances 0.000 title abstract 2
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 59
- 239000010959 steel Substances 0.000 claims abstract description 59
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims abstract description 30
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 28
- 229910052786 argon Inorganic materials 0.000 claims abstract description 15
- 239000002893 slag Substances 0.000 claims abstract description 15
- 229910052742 iron Inorganic materials 0.000 claims abstract description 14
- 238000007664 blowing Methods 0.000 claims abstract description 13
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 10
- 238000009749 continuous casting Methods 0.000 claims abstract description 10
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 8
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims abstract description 7
- 235000011941 Tilia x europaea Nutrition 0.000 claims abstract description 7
- 238000005261 decarburization Methods 0.000 claims abstract description 7
- 239000004571 lime Substances 0.000 claims abstract description 7
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 6
- 238000007670 refining Methods 0.000 claims abstract description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 5
- 238000005275 alloying Methods 0.000 claims abstract description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 5
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 5
- 230000023556 desulfurization Effects 0.000 claims abstract description 5
- 239000000463 material Substances 0.000 claims abstract description 5
- 239000001301 oxygen Substances 0.000 claims abstract description 5
- 238000010079 rubber tapping Methods 0.000 claims abstract description 5
- 238000007789 sealing Methods 0.000 claims abstract description 3
- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical compound [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 8
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 238000005266 casting Methods 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 4
- 238000000465 moulding Methods 0.000 claims description 4
- 238000002791 soaking Methods 0.000 claims description 3
- -1 C≤0.06wt% Inorganic materials 0.000 claims description 2
- 239000007789 gas Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 239000000843 powder Substances 0.000 abstract description 3
- 238000007654 immersion Methods 0.000 abstract 1
- 230000024121 nodulation Effects 0.000 abstract 1
- 238000003756 stirring Methods 0.000 abstract 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 239000011777 magnesium Substances 0.000 description 4
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- 239000010936 titanium Substances 0.000 description 4
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- 229910000914 Mn alloy Inorganic materials 0.000 description 2
- 229910001257 Nb alloy Inorganic materials 0.000 description 2
- 229910001096 P alloy Inorganic materials 0.000 description 2
- 229910000676 Si alloy Inorganic materials 0.000 description 2
- 229910001069 Ti alloy Inorganic materials 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 2
- 230000003749 cleanliness Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 241001062472 Stokellia anisodon Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
Landscapes
- Treatment Of Steel In Its Molten State (AREA)
Abstract
A method for smelting ultra-low carbon steel containing phosphorus, in which molten iron is pretreated and blown with desulfurization powder until S in the molten iron is less than or equal to 0.003 wt%; deoxidizing and reducing carbon in a converter, blowing oxygen for 15-18 min, adding a slagging material, stopping slag and tapping when C in molten steel is less than or equal to 0.06%, O reaches 0.05-0.09%, and the temperature of the molten steel in the converter reaches 1680-1720 ℃, and adding 2-5 kg/t lime in an argon station; adding a slagging agent into a steel ladle in LF refining, blowing argon at the bottom for stirring, transferring to RH vacuum refining for decarburization and denitrification when the temperature of molten steel reaches 1630-1650 ℃, carrying out batch alloying when the C in the steel is less than or equal to 0.0050 wt%, standing for 15-25 min for continuous casting when the components and the temperature reach a target, blowing argon for sealing among a long nozzle, a stopper rod, an upper nozzle and an immersion nozzle during pouring of a tundish, and adding a carbon-free covering agent for protecting pouring. The invention can improve the purity of molten steel, improve the castability of steel, effectively control nozzle nodulation, improve smelting production efficiency and steel quality, reduce spare part consumption and reduce steel cost per ton.
Description
Technical field
The invention belongs to process for making field, particularly a kind of smelting process of phosphorous ultra low-carbon steel.
Background technology
RH vacuum metling ultra low-carbon steel (C≤0.0050%) technology is ripe day by day, along with the high development of automotive industry, has higher requirement to automobile ultra low-carbon steel, requires to have high strength and excellent deep drawability.In ultra low-carbon steel, strengthening element C content is low and be fixed, and thus usually adds strengthening element P and improves intensity, reach the requirement of high strength.
The smelting of phosphorous ultra low-carbon steel mainly solves decarburization, falls nitrogen, and purity control and microalloying eliminate the problem of C, N interstitial atom.Decarburization, the critical technological point falling nitrogen generally solve.Microalloying adds Ti and C, atom N, and form precipitate Ti (C, N), can eliminate interstitial atom, adding P can form substitutional solid solution, improves the tensile strength of ultra low-carbon steel, to reach the requirement of high strength.But it is the critical technological point smelting phosphorous ultra low-carbon steel that purity controls.When cast is containing Ti ultra low-carbon steel, produces dross in submerged nozzle, have a strong impact on production efficiency, quality product is worked the mischief simultaneously.And for containing Ti steel grade, increase P element wherein and nozzle clogging problem will be made more serious.
Summary of the invention
The invention provides a kind of smelting process of phosphorous ultra low-carbon steel, its object is to the Molten Steel Cleanliness by improving phosphorous ultra low-carbon steel, nozzle clogging in production control process, thus improve smelting production efficiency and steel.
For this reason, the solution that the present invention takes is:
A smelting process for phosphorous ultra low-carbon steel, its operational path is hot metal pretreatment-converter smelting-LF stove refining-RH vacuum refinement-continuous casting, and concrete grammar is:
Hot metal pretreatment: blowing desulfurization pulvis in molten iron, and it is clean to skim, when during S≤0.003wt%, molten iron being proceeded to converter smelting in molten iron.
Converter smelting: carry out deoxidation carbon drop in converter, oxygen blow duration is 15 ~ 18min; In molten steel, slag making materials is added in smelting process, when in molten steel, C≤0.06wt%, O reach 0.05 ~ 0.09wt%, and tap in ladle when in converter, liquid steel temperature reaches 1680 ~ 1720 DEG C, adopt Slag Retaining Process in tapping process, argon station adds 2 ~ 5kg/t lime.
LF stove refining: adopt the heating of electrode pair molten steel, add slag former simultaneously in ladle, with steel ladle bottom argon blowing, molten steel is stirred, the composition of even molten steel and temperature.When liquid steel temperature reaches 1630 ~ 1650 DEG C, proceed to vacuum refinement operation.
RH vacuum refinement: adopt the decarburization of RH vacuum cycle device, denitrogenation, when in steel during C≤0.0050wt%, alloying in batches, changes inclusion kind and quantity.After composition various in molten steel and temperature reach target value, leave standstill 15 ~ 25min, then molten steel is proceeded to continuous casting working procedure.
Continuous casting: when basket pouring, adopt blowing argon gas sealing in position between long nozzle, stopper, filling pipe end, soaking water gap plate, tundish adds carbon-free covering agent and carries out molding casting.
Beneficial effect of the present invention is:
The present invention can improve the Molten Steel Cleanliness of phosphorous ultra low-carbon steel, the castability of the phosphorous ultra low-carbon steel of remarkable improvement, make often to water time production stove number and bring up to 6 stoves by 4 stoves, nozzle clogging in effective production control process, improve and smelt production efficiency and steel, make 75 grades of ratios improve 50%, and can spare parts consumption be reduced, reduce ton steel cost, often water the secondary submerged nozzle usage quantity that often flows and be down to 1 by 2 ~ 3.
Embodiment
Embodiment 1: steel grade is: 210P1; Wherein P content is 0.08wt%, and C content is 0.0029wt%.
Hot metal pretreatment: adopt desulphurization spray gun to blowing magnesium base desulfurization powder in molten iron, CaO/Mg mass ratio is 4:1, and it is clean to skim, when during S≤0.003wt%, molten iron being proceeded to converter smelting in molten iron.
Converter smelting: carry out deoxidation carbon drop in converter, oxygen blow duration is 15min; In molten steel, add slag making materials in smelting process, as C0.04wt%, O0.06wt% in molten steel, and tap in ladle when liquid steel temperature reaches 1690 DEG C in converter, adopt Slag Retaining Process in tapping process, argon station adds 3.5kg/t lime.
LF stove refining: adopt the heating of electrode pair molten steel, add slag former lime 1t (260 tons of LF stoves) simultaneously in ladle, carries out modification to top slag, improves basicity.And with steel ladle bottom argon blowing, molten steel is stirred, when liquid steel temperature reaches 1640 DEG C, proceed to vacuum refinement operation.
RH vacuum refinement: adopt RH vacuum cycle device decarburization 12min, when in steel during C≤0.0050wt%, it is calm to add aluminum steel section; Add manganese alloy, silicon alloy after aluminium alloying 3min, after the 3min of interval, add niobium alloy and phosphorus alloy, after the 5min of interval, add titanium alloy again, after clean circulation 6min, close RH vacuum cycle device.After composition various in molten steel and temperature reach target value, leave standstill 20min, inclusion is fully floated, again molten steel is proceeded to continuous casting working procedure thereafter.
Continuous casting: when basket pouring, is blown into 6L/min argon gas-sealed to stopper, filling pipe end, and tundish adds 1kg/t carbon-free covering agent and carries out molding casting.
Embodiment 2:170P1; Wherein P content is 0.04wt%, and C content is 0.0020wt%.
Hot metal pretreatment: adopt desulphurization spray gun to blowing magnesium base desulfurization powder in molten iron, CaO/Mg mass ratio is 4:1, and it is clean to skim, when during S≤0.003wt%, molten iron being proceeded to converter smelting in molten iron.
Converter smelting: carry out deoxidation carbon drop in converter, oxygen blow duration is 18min; In molten steel, add slag making materials in smelting process, as C0.05wt%, O0.08wt% in molten steel, and tap in ladle when liquid steel temperature reaches 1710 DEG C in converter, adopt Slag Retaining Process in tapping process, argon station adds 3kg/t lime.
LF stove refining: adopt the heating of electrode pair molten steel, add slag former lime 1t (260 tons of LF stoves) simultaneously in ladle, carries out modification to top slag, improves basicity.And with steel ladle bottom argon blowing, molten steel is stirred, when liquid steel temperature reaches 1630 DEG C, proceed to vacuum refinement operation.
RH vacuum refinement: adopt RH vacuum cycle device decarburization 12min, when in steel during C≤0.0050wt%, it is calm to add aluminum steel section; Add manganese alloy, silicon alloy after aluminium alloying 3min, after the 3min of interval, add niobium alloy and phosphorus alloy, after the 5min of interval, add titanium alloy again, after clean circulation 6min, close RH vacuum cycle device.After composition various in molten steel and temperature reach target value, leave standstill 25min, inclusion is fully floated, again molten steel is proceeded to continuous casting working procedure thereafter.
Continuous casting: when basket pouring, is blown into 5L/min argon gas-sealed between long nozzle, stopper, filling pipe end, soaking water gap plate, and tundish adds 1kg/t carbon-free covering agent and carries out molding casting.
Claims (1)
1. a smelting process for phosphorous ultra low-carbon steel, is characterized in that:
Hot metal pretreatment: blowing desulfurization pulvis in molten iron, and it is clean to skim, when during S≤0.003wt%, molten iron being proceeded to converter smelting in molten iron;
Converter smelting: carry out deoxidation carbon drop in converter, oxygen blow duration is 15 ~ 18min; In molten steel, slag making materials is added in smelting process, when in molten steel, C≤0.06wt%, O reach 0.05 ~ 0.09wt%, and tap in ladle when in converter, liquid steel temperature reaches 1680 ~ 1720 DEG C, adopt Slag Retaining Process in tapping process, argon station adds 2 ~ 5kg/t lime;
LF stove refining: adopt the heating of electrode pair molten steel, add slag former simultaneously in ladle, with steel ladle bottom argon blowing, molten steel is stirred, when liquid steel temperature reaches 1630 ~ 1650 DEG C, proceed to vacuum refinement operation;
RH vacuum refinement: adopt the decarburization of RH vacuum cycle device, denitrogenation, when in steel during C≤0.0050wt%, alloying in batches; After composition various in molten steel and temperature reach target value, leave standstill 15 ~ 25min, then molten steel is proceeded to continuous casting working procedure;
Continuous casting: when basket pouring, adopt blowing argon gas sealing in position between long nozzle, stopper, filling pipe end, soaking water gap plate, tundish adds carbon-free covering agent and carries out molding casting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410483658.2A CN105483501A (en) | 2014-09-19 | 2014-09-19 | Smelting method of phosphorus-containing ultra-low carbon steel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410483658.2A CN105483501A (en) | 2014-09-19 | 2014-09-19 | Smelting method of phosphorus-containing ultra-low carbon steel |
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| CN105483501A true CN105483501A (en) | 2016-04-13 |
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| CN201410483658.2A Pending CN105483501A (en) | 2014-09-19 | 2014-09-19 | Smelting method of phosphorus-containing ultra-low carbon steel |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107365890A (en) * | 2016-05-12 | 2017-11-21 | 鞍钢股份有限公司 | Method for controlling inclusions in X80 pipeline steel |
| CN107365884A (en) * | 2016-05-12 | 2017-11-21 | 鞍钢股份有限公司 | Method for narrow-range control of carbon content of ultra-low carbon steel |
| CN108866276A (en) * | 2018-07-26 | 2018-11-23 | 攀钢集团攀枝花钢铁研究院有限公司 | Improve the smelting process of heavy rail steel cleanness |
| CN109666854A (en) * | 2019-01-15 | 2019-04-23 | 舞阳钢铁有限责任公司 | A kind of smelting process of mild steel |
| CN110484808A (en) * | 2019-09-04 | 2019-11-22 | 鞍钢股份有限公司 | A method of improving phosphorous ultra-low-carbon steel castability |
| CN111545718A (en) * | 2020-05-11 | 2020-08-18 | 首钢集团有限公司 | Method and device for blowing argon in slab continuous casting |
| CN111621622A (en) * | 2020-06-09 | 2020-09-04 | 攀钢集团攀枝花钢铁研究院有限公司 | Smelting method of high-cleanliness steel |
| CN114807731A (en) * | 2022-05-20 | 2022-07-29 | 山东钢铁集团日照有限公司 | Smelting method of steel grade with ultra-low carbon and large silicon-manganese alloy amount |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05230516A (en) * | 1992-02-19 | 1993-09-07 | Kawasaki Steel Corp | Melting method for extra-low-carbon steel |
| JP2004238698A (en) * | 2003-02-07 | 2004-08-26 | Nisshin Steel Co Ltd | Production method of high cleanliness steel |
| CN101215618A (en) * | 2007-12-27 | 2008-07-09 | 本钢板材股份有限公司 | Method for smelting ultra-low-carbon steel |
| CN101550475A (en) * | 2009-05-15 | 2009-10-07 | 首钢总公司 | Method for producing ultra-low-carbon steel |
| CN103014537A (en) * | 2011-09-21 | 2013-04-03 | 山西太钢不锈钢股份有限公司 | Smelting method of steel used in high speed passenger train hollow axle |
| CN103451349A (en) * | 2013-08-16 | 2013-12-18 | 河北钢铁股份有限公司邯郸分公司 | Control method for preventing nozzle clogging in casting process of ultra-low carbon-aluminium deoxidized molten steel |
-
2014
- 2014-09-19 CN CN201410483658.2A patent/CN105483501A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05230516A (en) * | 1992-02-19 | 1993-09-07 | Kawasaki Steel Corp | Melting method for extra-low-carbon steel |
| JP2004238698A (en) * | 2003-02-07 | 2004-08-26 | Nisshin Steel Co Ltd | Production method of high cleanliness steel |
| CN101215618A (en) * | 2007-12-27 | 2008-07-09 | 本钢板材股份有限公司 | Method for smelting ultra-low-carbon steel |
| CN101550475A (en) * | 2009-05-15 | 2009-10-07 | 首钢总公司 | Method for producing ultra-low-carbon steel |
| CN103014537A (en) * | 2011-09-21 | 2013-04-03 | 山西太钢不锈钢股份有限公司 | Smelting method of steel used in high speed passenger train hollow axle |
| CN103451349A (en) * | 2013-08-16 | 2013-12-18 | 河北钢铁股份有限公司邯郸分公司 | Control method for preventing nozzle clogging in casting process of ultra-low carbon-aluminium deoxidized molten steel |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107365890A (en) * | 2016-05-12 | 2017-11-21 | 鞍钢股份有限公司 | Method for controlling inclusions in X80 pipeline steel |
| CN107365884A (en) * | 2016-05-12 | 2017-11-21 | 鞍钢股份有限公司 | Method for narrow-range control of carbon content of ultra-low carbon steel |
| CN108866276A (en) * | 2018-07-26 | 2018-11-23 | 攀钢集团攀枝花钢铁研究院有限公司 | Improve the smelting process of heavy rail steel cleanness |
| CN109666854A (en) * | 2019-01-15 | 2019-04-23 | 舞阳钢铁有限责任公司 | A kind of smelting process of mild steel |
| CN110484808A (en) * | 2019-09-04 | 2019-11-22 | 鞍钢股份有限公司 | A method of improving phosphorous ultra-low-carbon steel castability |
| CN111545718A (en) * | 2020-05-11 | 2020-08-18 | 首钢集团有限公司 | Method and device for blowing argon in slab continuous casting |
| CN111545718B (en) * | 2020-05-11 | 2022-04-19 | 首钢集团有限公司 | Method and device for blowing argon in slab continuous casting |
| CN111621622A (en) * | 2020-06-09 | 2020-09-04 | 攀钢集团攀枝花钢铁研究院有限公司 | Smelting method of high-cleanliness steel |
| CN114807731A (en) * | 2022-05-20 | 2022-07-29 | 山东钢铁集团日照有限公司 | Smelting method of steel grade with ultra-low carbon and large silicon-manganese alloy amount |
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Application publication date: 20160413 |