CN104988424B - Method for smelting non-oriented silicon steel by using molten iron containing vanadium and titanium - Google Patents
Method for smelting non-oriented silicon steel by using molten iron containing vanadium and titanium Download PDFInfo
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- CN104988424B CN104988424B CN201510462347.2A CN201510462347A CN104988424B CN 104988424 B CN104988424 B CN 104988424B CN 201510462347 A CN201510462347 A CN 201510462347A CN 104988424 B CN104988424 B CN 104988424B
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- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 title claims abstract description 94
- 229910052720 vanadium Inorganic materials 0.000 title claims abstract description 93
- 238000000034 method Methods 0.000 title claims abstract description 89
- 229910000976 Electrical steel Inorganic materials 0.000 title claims abstract description 67
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 33
- 239000010936 titanium Substances 0.000 title abstract description 16
- 229910052742 iron Inorganic materials 0.000 title abstract description 13
- 238000003723 Smelting Methods 0.000 title abstract description 11
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 title abstract description 8
- 229910052719 titanium Inorganic materials 0.000 title abstract description 8
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 166
- 239000010959 steel Substances 0.000 claims abstract description 166
- 239000002893 slag Substances 0.000 claims abstract description 60
- 238000009628 steelmaking Methods 0.000 claims abstract description 51
- 238000000605 extraction Methods 0.000 claims abstract description 37
- 238000009749 continuous casting Methods 0.000 claims abstract description 17
- 238000007670 refining Methods 0.000 claims abstract description 16
- 238000010079 rubber tapping Methods 0.000 claims description 55
- 238000006477 desulfuration reaction Methods 0.000 claims description 52
- 229910052717 sulfur Inorganic materials 0.000 claims description 52
- 239000011593 sulfur Substances 0.000 claims description 52
- 230000023556 desulfurization Effects 0.000 claims description 51
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 48
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical group [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 42
- 229910052760 oxygen Inorganic materials 0.000 claims description 42
- 239000001301 oxygen Substances 0.000 claims description 42
- 238000007664 blowing Methods 0.000 claims description 39
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 38
- 229910052751 metal Inorganic materials 0.000 claims description 38
- 239000002184 metal Substances 0.000 claims description 38
- 239000000203 mixture Substances 0.000 claims description 30
- 229910052786 argon Inorganic materials 0.000 claims description 24
- 239000003795 chemical substances by application Substances 0.000 claims description 24
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 22
- 239000008187 granular material Substances 0.000 claims description 20
- 239000002826 coolant Substances 0.000 claims description 15
- 229910045601 alloy Inorganic materials 0.000 claims description 13
- 239000000956 alloy Substances 0.000 claims description 13
- 241001417490 Sillaginidae Species 0.000 claims description 12
- 230000003009 desulfurizing effect Effects 0.000 claims description 12
- 238000010438 heat treatment Methods 0.000 claims description 12
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 11
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 11
- 238000005275 alloying Methods 0.000 claims description 11
- 239000011575 calcium Substances 0.000 claims description 11
- 229910052791 calcium Inorganic materials 0.000 claims description 11
- 238000002347 injection Methods 0.000 claims description 11
- 239000007924 injection Substances 0.000 claims description 11
- 239000011777 magnesium Substances 0.000 claims description 11
- 229910052749 magnesium Inorganic materials 0.000 claims description 11
- 229910052757 nitrogen Inorganic materials 0.000 claims description 11
- 238000005096 rolling process Methods 0.000 claims description 11
- 229910052782 aluminium Inorganic materials 0.000 claims description 9
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical group [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 9
- 229910052799 carbon Inorganic materials 0.000 claims description 9
- 229910000616 Ferromanganese Inorganic materials 0.000 claims description 8
- DALUDRGQOYMVLD-UHFFFAOYSA-N iron manganese Chemical compound [Mn].[Fe] DALUDRGQOYMVLD-UHFFFAOYSA-N 0.000 claims description 8
- 239000012535 impurity Substances 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- 229910000519 Ferrosilicon Inorganic materials 0.000 claims description 4
- 239000000155 melt Substances 0.000 claims description 4
- 238000005453 pelletization Methods 0.000 claims description 3
- 235000006679 Mentha X verticillata Nutrition 0.000 claims 3
- 235000002899 Mentha suaveolens Nutrition 0.000 claims 3
- 235000001636 Mentha x rotundifolia Nutrition 0.000 claims 3
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 238000005516 engineering process Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 2
- 238000005272 metallurgy Methods 0.000 abstract 1
- 241001062472 Stokellia anisodon Species 0.000 description 14
- 239000007788 liquid Substances 0.000 description 14
- 239000000126 substance Substances 0.000 description 13
- 239000011572 manganese Substances 0.000 description 12
- 229910052759 nickel Inorganic materials 0.000 description 11
- 239000004615 ingredient Substances 0.000 description 7
- 238000005070 sampling Methods 0.000 description 7
- 229910052748 manganese Inorganic materials 0.000 description 5
- PNXOJQQRXBVKEX-UHFFFAOYSA-N iron vanadium Chemical compound [V].[Fe] PNXOJQQRXBVKEX-UHFFFAOYSA-N 0.000 description 2
- 239000010970 precious metal Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- MBMLMWLHJBBADN-UHFFFAOYSA-N Ferrous sulfide Chemical compound [Fe]=S MBMLMWLHJBBADN-UHFFFAOYSA-N 0.000 description 1
- 102000005298 Iron-Sulfur Proteins Human genes 0.000 description 1
- 108010081409 Iron-Sulfur Proteins Proteins 0.000 description 1
- CXCBJSTXZQPTLV-UHFFFAOYSA-N O.[Fe].[Ti].[V] Chemical compound O.[Fe].[Ti].[V] CXCBJSTXZQPTLV-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- QFGIVKNKFPCKAW-UHFFFAOYSA-N [Mn].[C] Chemical compound [Mn].[C] QFGIVKNKFPCKAW-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 230000005713 exacerbation Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 230000032696 parturition Effects 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000013000 roll bending Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention relates to a method for smelting non-oriented silicon steel by using molten iron containing vanadium and titanium, and belongs to the technical field of metallurgy. The method comprises the steps of converter vanadium extraction of the molten iron containing vanadium and titanium, desulphurization, converter steelmaking, RH refining and slab continuous casting in order to obtain the non-oriented silicon steel. The method fully overcomes the disadvantages of poor top slag fluidity, poor desulphurization effect and many residual elements of the molten iron containing vanadium and titanium, reduces entrance of vanadium, titanium and other residual elements to the molten steel, and improves the purity of the molten steel; and the method adopting a double station RH refinery and continuous caster matching production mode guarantees the smelting cycle in a range of 35-40min. The technology has the characteristics of high purity of the molten steel, high castability of the molten steel, and short production cycle.
Description
Technical field
The invention belongs to metallurgical technology field is and in particular to a kind of use hot metal containing V-Ti smelts the side of non-orientation silicon steel
Method.
Background technology
At present, vanadium titano-magnetite is used as the iron and steel enterprise of main material production, due to vanadium unit in the molten iron that it produces
Cellulose content between 0.100%-0.500%, based on the feature of hot metal containing V-Ti, cause Sulfur Content in Hot Iron content fluctuation larger and
Unstable, this has resulted in the difficulty of vanadium-bearing hot metal desulfurization, and in molten steel, sulfur content exceeds non-orientation silicon steel and requires, and is produced
Non-orientation silicon steel can lead to because sulfur content is too high iron loss increase, impact client use.If taking molten iron vanadium extraction by converter blowing
Desulfurization treatment process, molten iron consumes amount of heat in vanadium extraction by converter blowing consumption, and desulfurizing steel-making converter has shortage of heat, smelting
Refining final sulfur content uncontrollable below 0.003%, because non-orientation silicon steel finished product carbon content is below 0.008%, can go out again
Existing rh stove is added ferrosilicon process and is increased sulfur phenomenon, and by silicon reinsertion amount big contained using the sulfur that the element sulphur in ferrosilicon can make molten steel
Amount is increased to more than 0.008%, the performance of severe exacerbation roll bending, causes iron loss to increase.
Content of the invention
It is an object of the present invention to provide a kind of method that use hot metal containing V-Ti smelts non-orientation silicon steel, using hot metal containing V-Ti
As raw material, take vanadium extraction hot metal pretreatment technology in pneumatic steelmaking operation, prepare half steel below 0.003% for the sulfur content, protect
Card finished product non-orientation silicon steel sulfur is less than less than 0.008%.
The technical scheme is that a kind of method that use hot metal containing V-Ti smelts non-orientation silicon steel, using containing vanadium iron
Water obtains described non-orientation silicon steel, specific embodiment through vanadium extraction by converter blowing, desulfurization, pneumatic steelmaking, rh refine, sheet billet continuous casting operation
As follows:
(1) vanadium extraction by converter blowing: from the vanadium-bearing hot metal of sulfur content≤0.030wt%, vanadium extraction adds low-sulfur coolant it is ensured that half
Steel temperature is at 1330～1350 DEG C；Add 1～1.5 ton of calcium-based desulfurizing agent before going out half steel in half ladle, obtain v≤
The half steel containing vanadium of 0.060wt%；
(2) desulfurization: described half steel containing vanadium carries out desulfurization process, the injection time is 6-20min, granule magnesium amount 50-200kg,
After desulfurization terminates, obtain making steel half steel sulfur content s≤0.0030%；
(3) pneumatic steelmaking: described steel-making half steel is blended into steelmaking converter and is blown, and in converting process, bottom-blowing of converter whole process is blown
Argon, and ensure bottom blowing intensity >=0.03nm3/min•t；
Tapping process carries out deoxidation alloying operation according to terminal oxygen content, is uniformly added into deoxidation in tapping process successively
Agent, alloy are it is ensured that material fully melts and molten steel composition is uniform；
Converter tapping implements slag-stopping tapping, and slag retaining cone is used cooperatively with slide plate pushing off the slag, controls slag retaining cone to add opportunity, in gear
During slag cone pushing off the slag success, close slide plate, prevent diffusing nitrogen pick-up, after tapping, buggy ladle is left and carry out determining oxygen thermometric to argon station；
(4) rh refine: complete after molten steel determines oxygen thermometric, ladle is hung to rh stove refining treatment, temperature >=1650 DEG C, calm
Time >=20min, after component content reaches requirement, upper continuous casting, then directly fill rolling described non-orientation silicon steel.
Non-orientation silicon steel percentage composition of the present invention is as follows: c≤0.006%, si:0.70～0.90%, and mn:0.15～
0.25%, p≤0.040%, s≤0.008%, v≤0.006%, cr≤0.10%, cu≤0.20%, ni≤0.15%, ti≤0.003%,
B≤0.0005%, nb≤0.005%, n≤0.0040%, balance of ferrum and inevitable impurity component.
Non-orientation silicon steel percentage composition of the present invention is as follows: c≤0.005%, si:1.0～1.25%, and mn:0.15～
0.25%, p≤0.015%, s≤0.006%, v≤0.006%, cr≤0.10%, cu≤0.20%, ni≤0.15%, ti≤0.003%,
B≤0.0005%, nb≤0.005%, n≤0.0040%, balance of ferrum and inevitable impurity component.
Non-orientation silicon steel percentage composition of the present invention is as follows: c≤0.008%, si:0.3～0.5%, and mn:0.15～
0.25%, p≤0.040%, s≤0.008%, v≤0.006%, cr≤0.10%, cu≤0.20%, ni≤0.15%, ti≤0.003%,
B≤0.0005%, nb≤0.005%, n≤0.0040%, balance of ferrum and inevitable impurity component.
In step (1) of the present invention, after vanadium-bearing hot metal vanadium extraction, carry out desulfurization, make steel half steel sulfur content≤0.03wt%；Institute
Stating low-sulfur coolant is Australia's ore deposit, pelletizing, coolant sulfur content≤0.03%.
In step (1) of the present invention, when converter goes out carburetting half steel, add concurrent heating agent 200～400kg/ in half steel
Stove is it is ensured that heat in smelting process for the half steel；Concurrent heating agent is one or more of ferrosilicon, silicomangan.
In step (3) of the present invention, converter terminal s≤0.003wt%, p:0.015～0.030wt%, c:0.03～
0.05wt%.
In step (3) of the present invention, obtain the molten steel of argon station oxygen 600-800ppm.
In step (3) of the present invention, deoxidizer is aluminum, and addition is 0.13-0.26kg/t steel；Alloy uses low Carbon Manganese
Ferrum, usage amount is 1.98-2.78kg/ ton steel.
In step (3) of the present invention, and it is uniformly added into granule ash 300-500kg/ stove in tapping process.
The operation principle of the present invention: the present invention be directed to vanadium-bearing hot metal exist when smelting non-orientation silicon steel remaining vanadium in steel high,
Situations such as molten iron sulfur is unstable, desulfurization process desulfurization is difficult, takes the half steel pair through desulfurization after processing using vanadium-bearing hot metal vanadium extraction
The high method of molten steel sulfur solves the problems referred to above, makes vanadium-bearing hot metal produce non-orientation silicon steel and is possibly realized, and reduces and given birth to
This important indicator of iron loss of the non-orientation silicon steel producing, in addition also considerably reduces production cost, it is to avoid because desulfurization causes
Iron loss increase it is achieved that the cost efficiency of enterprise.Add concurrent heating agent in vanadium extraction by converter blowing tapping process and ensure that half steel temperature exists
1330-1350 DEG C, thus provide temperature for desulfurization process ensureing, be that steel making working procedure ensure that heat, thus avoiding vanadium extraction work
The increasing sulfur of sequence → steel making working procedure, principle is: taking desulfurization → vanadium extraction by converter blowing → pneumatic steelmaking as a example, exists in desulfurization process sulfur
When less than 0.003%, vanadium extraction operation is to reduce half steel residual elements, and converting process needs to add low-sulfur cold burden, and half steel returns sulfur and reaches
More than 0.005%, this has resulted in half steel sulfur and has raised it is impossible to the low-sulfur meeting non-orientation silicon steel requires.
Using having the beneficial effect that the technical program obtains:
The present invention provides a kind of use hot metal containing V-Ti smelting non-orientation silicon steel feasible and the smelting process of economy, is giving birth to
While producing non-orientation silicon steel, do not affect the precious metal vanadium in vanadium-titanium-iron-water, titanium refines, and saves mineral resources, solve and work as
During final sulfur content relatively low (sulfur≤0.003%), by the technique of vanadium extraction desulfurization to molten steel terminal sulfur, through converter, rh stove essence
Refining can effectively reduce the finished product sulfur content of non-orientation silicon steel, the process time contracting of desulfurization under the conditions of same molten iron after processing
Short, reduce desulfuration operations difficulty；While by using desulfurization → vanadium extraction by converter blowing technique, increased precious metal vanadium, titanium carries
Refining it is ensured that the qualification rate of molten steel, this process direct saving converter smelting non-orientation silicon steel because sulfur composition do not conform to molten
It is smelt this.
This technique fully overcomes the shortcoming more than hot metal containing V-Ti top slag poor fluidity, desulfurized effect difference and residual elements, subtracts
Few vanadium, titanium and other residual elements enter in molten steel, improve molten steel degree of purity；One continuous casting is mated using double rh refining furnace
The production model of machine is it is ensured that smelting cycle is in 35～40min.Therefore, this technique has Molten Steel Cleanliness height, pourability of molten steel
Feature high, with short production cycle.
Specific embodiment
With reference to specific embodiment, the present invention is further detailed explanation.
The embodiment of the present invention is used for the steel based on smelting vanadium-bearing hot metal using vanadium extraction-desulfurization-steel-making duplex production technology
Ferrum enterprise.Originally it is embodied as 150 tons of converter systems, steelshop arranges three block converters in converter bay, wherein one is used for vanadium extraction,
Other two are used for making steel, and the non-orientation silicon steel processing step being produced is as follows:
Embodiment 1
Smelt cgw800a non-orientation silicon steel, chemical component weight percentage requirement is as follows: c≤0.006%, si:0.70～
0.90%, mn:0.15～0.25%, p≤0.040%, s≤0.008%, v≤0.006%, cr≤0.10%, cu≤0.20%, ni≤
0.15%, ti≤0.003%, b≤0.0005%, nb≤0.005%, n≤0.0040%.
(1) vanadium extraction by converter blowing: from the vanadium-bearing hot metal of sulfur content≤0.030wt%, vanadium extraction adds low-sulfur coolant Australia ore deposit, protects
Card half steel temperature, at 1330 DEG C, adds 1 ton of calcium-based desulfurizing agent before going out half steel in half ladle, obtains c:4.30%, v:
0.050% half steel containing vanadium；When converter extracting vanadium is tapped, add concurrent heating agent silicomangan 400kg/ stove in half steel；
(2) desulfurization: described steel-making half steel carries out desulfurization process, the injection time is 6min, granule magnesium amount 50kg, and desulfurization is tied
Obtain after bundle making steel half steel s:0.003wt%；
(3) pneumatic steelmaking: described steel-making half steel is blended into steelmaking converter and is blown, and in converting process, bottom-blowing of converter whole process is blown
Argon, bottom blowing intensity 0.03nm3/ min t, converter terminal composition by weight percent is c:0.03%；P:0.020%；S:0.003%；V:
0.004%；
Tapping process carries out deoxidation alloying operation according to terminal oxygen content, and deoxidizer uses aluminum, and addition is 0.13kg/
Ton steel, alloy uses low-carbon ferromanganese, and usage amount is 2.78kg/ ton steel.
Converter tapping implements slag-stopping tapping, and slag retaining cone is used cooperatively with slide plate pushing off the slag, controls slag retaining cone to add opportunity, in gear
During slag cone pushing off the slag success, close slide plate, prevent diffusing nitrogen pick-up, and be uniformly added into granule ash 300kg/ stove, tapping in tapping process
Afterwards, liquid steel sampling composition by weight percent is c:0.03%；Si:0.004%；Mn:0.20%；P:0.020%；S:0.004%；V:
0.0004%；N:0.0018%, buggy ladle is left and carries out determining oxygen thermometric to argon station, and liquid steel temperature is 1650 DEG C, and oxygen is 795ppm；
(4) rh refine: complete after molten steel determines oxygen thermometric, ladle be hung to rh stove refining treatment, 1650 DEG C of temperature, calm when
Between 20min, after component content reaches requirement, upper continuous casting, then directly fill rolling described non-orientation silicon steel, Ingredients Weight
Percentage ratio is c:0.0054%, si:0.72%, mn:0.19%, p:0.020%, s:0.004%, v:0.006%, cr:0.10%, cu:
0.20%, ni:0.10%, ti:0.003%, b:0.0005%, nb:0.004%, n:0.0035%.
Embodiment 2
Smelt cgw800a non-orientation silicon steel, the chemical component weight percentage requirement of strand is as follows: c≤0.006%, si:
0.70～0.90%, mn:0.15～0.25%, p≤0.040%, s≤0.008%, v≤0.006%, cr≤0.10%, cu≤0.20%,
Ni≤0.15%, ti≤0.003%, b≤0.0005%, nb≤0.005%, n≤0.0040%.
(1) vanadium extraction by converter blowing: from the vanadium-bearing hot metal of sulfur content≤0.030wt%, vanadium extraction adds low-sulfur coolant Australia ore deposit, protects
Card half steel temperature, at 1337 DEG C, adds 1.5 tons of calcium-based desulfurizing agent before going out half steel in half ladle, obtains c:4.35%, v:
0.042% half steel containing vanadium；When converter extracting vanadium is tapped, add concurrent heating agent silicomangan 400kg/ stove in half steel；
(2) desulfurization: described steel-making half steel carries out desulfurization process, the injection time is 15min, granule magnesium amount 100kg, and desulfurization is tied
Obtain after bundle making steel half steel s:0.003wt%；
(3) pneumatic steelmaking: described steel-making half steel is blended into steelmaking converter and is blown, and in converting process, bottom-blowing of converter whole process is blown
Argon, bottom blowing intensity 0.04nm3/ min t, converter terminal composition by weight percent is c:0.04%；P:0.022%；S:0.003%；V:
0.002%；
Tapping process carries out deoxidation alloying operation according to terminal oxygen content, and deoxidizer uses aluminum, and addition is 0.26kg/
Ton steel, alloy uses low-carbon ferromanganese, and usage amount is 2.61kg/ ton steel.
Converter tapping implements slag-stopping tapping, and slag retaining cone is used cooperatively with slide plate pushing off the slag, controls slag retaining cone to add opportunity, in gear
During slag cone pushing off the slag success, close slide plate, prevent diffusing nitrogen pick-up, and be uniformly added into granule ash 350kg/ stove, tapping in tapping process
Afterwards, liquid steel sampling composition by weight percent is c:0.04%；Si:0.005%；Mn:0.21%；P:0.026%；S:0.006%；V:
0.0014%；N:0.0013%, buggy ladle is left and carries out determining oxygen thermometric to argon station, and liquid steel temperature is 1669 DEG C, and oxygen is 714ppm；
(4) rh refine: complete after molten steel determines oxygen thermometric, ladle be hung to rh stove refining treatment, 1669 DEG C of temperature, calm when
Between 22min, after component content reaches requirement, upper continuous casting, then directly fill rolling described non-orientation silicon steel, Ingredients Weight
Percentage ratio is c:0.004%, si:0.85%, mn:0.17%, p:0.026%, s:0.006%, v:0.003%, cr:0.09%, cu:
0.15%, ni:0.15%, ti:0.002%, b:0.0004%, nb:0.005%, n:0.0015%.
Embodiment 3
Smelt cgw800a non-orientation silicon steel, the chemical component weight percentage requirement of strand is as follows: c≤0.006%, si:
0.70～0.90%, mn:0.15～0.25%, p≤0.040%, s≤0.008%, v≤0.006%, cr≤0.10%, cu≤0.20%,
Ni≤0.15%, ti≤0.003%, b≤0.0005%, nb≤0.005%, n≤0.0040%.
(1) vanadium extraction by converter blowing: from the vanadium-bearing hot metal of sulfur content≤0.030wt%, vanadium extraction adds low-sulfur coolant Australia ore deposit, protects
Card half steel temperature, at 1344 DEG C, adds 1.0 tons of calcium-based desulfurizing agent before going out half steel in half ladle, obtains c:4.22%, v:
0.053% half steel containing vanadium；When converter extracting vanadium is tapped, add concurrent heating agent silicomangan 400kg/ stove in half steel；
(2) desulfurization: described steel-making half steel carries out desulfurization process, the injection time is 20min, granule magnesium amount 200kg, desulfurization
Obtain after end making steel half steel s:0.002wt%；
(3) pneumatic steelmaking: described steel-making half steel is blended into steelmaking converter and is blown, and in converting process, bottom-blowing of converter whole process is blown
Argon, bottom blowing intensity 0.03nm3/ min t, converter terminal composition by weight percent is c:0.05%；P:0.023%；S:0.004%；V:
0.001%；
Tapping process carries out deoxidation alloying operation according to terminal oxygen content, and deoxidizer uses aluminum, and addition is 0.21kg/
Ton steel, alloy uses low-carbon ferromanganese, and usage amount is 2.45kg/ ton steel.
Converter tapping implements slag-stopping tapping, and slag retaining cone is used cooperatively with slide plate pushing off the slag, controls slag retaining cone to add opportunity, in gear
During slag cone pushing off the slag success, close slide plate, prevent diffusing nitrogen pick-up, and be uniformly added into granule ash 370kg/ stove, tapping in tapping process
Afterwards, liquid steel sampling composition by weight percent is c:0.05%；Si:0.007%；Mn:0.21%；P:0.021%；S:0.0045%；V:
0.0023%；N:0.0015%, buggy ladle is left and carries out determining oxygen thermometric to argon station, and liquid steel temperature is 1651 DEG C, and oxygen is 600ppm；
(4) rh refine: complete after molten steel determines oxygen thermometric, ladle be hung to rh stove refining treatment, 1651 DEG C of temperature, calm when
Between 25min, after component content reaches requirement, upper continuous casting, then directly fill rolling described non-orientation silicon steel, Ingredients Weight
Percentage ratio is c:0.004%, si:0.82%, mn:0.23%, p:0.022%, s:0.005%, v:0.002%, cr:0.07%, cu:
0.10%, ni:0.10%, ti:0.001%, b:0.0002%, nb:0.003%, n:0.0018%.
Embodiment 4
Smelt cgw800a non-orientation silicon steel, the chemical component weight percentage requirement of strand is as follows: c≤0.006%, si:
0.70～0.90%, mn:0.15～0.25%, p≤0.040%, s≤0.008%, v≤0.006%, cr≤0.10%, cu≤0.20%,
Ni≤0.15%, ti≤0.003%, b≤0.0005%, nb≤0.005%, n≤0.0040%.
It is only described non-orientation silicon steel with embodiment 2 difference, composition by weight percent is c:0.006%, si:0.70%,
Mn:0.15%, p:0.040%, s:0.005%, v:0.002%, cr:0.07%, cu:0.10%, ni:0.10%, ti:0.001%, b:
0.0002%, nb:0.003%, n:0.0018%.
Embodiment 5
Smelt cgw800a non-orientation silicon steel, the chemical component weight percentage requirement of strand is as follows: c≤0.006%, si:
0.70～0.90%, mn:0.15～0.25%, p≤0.040%, s≤0.008%, v≤0.006%, cr≤0.10%, cu≤0.20%,
Ni≤0.15%, ti≤0.003%, b≤0.0005%, nb≤0.005%, n≤0.0040%.
It is only described non-orientation silicon steel with embodiment 3 difference, composition by weight percent is c:0.0042%, si:0.90%,
Mn:0.25%, p:0.030%, s:0.008%, v:0.002%, cr:0.08%, cu:0.10%, ni:0.10%, ti:0.001%, b:
0.0002%, nb:0.004%, n:0.0040%.
Embodiment 6
Smelt cgw600a non-orientation silicon steel, the chemical component weight percentage requirement of strand is as follows: c≤0.005%, si:
1.0～1.25%, mn:0.15%～0.25%, p≤0.040%, s≤0.006%, v≤0.006%, cr≤0.10%, cu≤0.20%,
Ni≤0.15%, ti≤0.003%, b≤0.0005%, nb≤0.005%, n≤0.0040%.
(1) vanadium extraction by converter blowing: from the vanadium-bearing hot metal of sulfur content≤0.030wt%, vanadium extraction adds low-sulfur coolant Australia ore deposit, protects
Card half steel temperature, at 1340 DEG C, adds 1.2 tons of calcium-based desulfurizing agent before going out half steel in half ladle, obtains c:4.20%, v:
0.050% half steel containing vanadium；When converter extracting vanadium is tapped, add concurrent heating agent silicomangan 400kg/ stove in half steel；
(2) desulfurization: described steel-making half steel carries out desulfurization process, the injection time is 18min, granule magnesium amount 120kg, desulfurization
Obtain after end making steel half steel s:0.003wt%；
(3) pneumatic steelmaking: described steel-making half steel is blended into steelmaking converter and is blown, and in converting process, bottom-blowing of converter whole process is blown
Argon, bottom blowing intensity 0.05nm3/ min t, converter terminal composition by weight percent is c:0.03%；P:0.012%；S:0.003%；V:
0.004%；
Tapping process carries out deoxidation alloying operation according to terminal oxygen content, and deoxidizer uses aluminum, and addition is 0.19kg/
Ton steel, alloy uses low-carbon ferromanganese, and usage amount is 2.18kg/ ton steel.
Converter tapping implements slag-stopping tapping, and slag retaining cone is used cooperatively with slide plate pushing off the slag, controls slag retaining cone to add opportunity, in gear
During slag cone pushing off the slag success, close slide plate, prevent diffusing nitrogen pick-up, and be uniformly added into granule ash 500kg/ stove, tapping in tapping process
Afterwards, liquid steel sampling composition by weight percent is c:0.03%；Si:0.004%；Mn:0.18%；P:0.014%；S:0.004%；V:
0.0004%；N:0.0018%, buggy ladle is left and carries out determining oxygen thermometric to argon station, and liquid steel temperature is 1670 DEG C, and oxygen is 800ppm；
(4) rh refine: complete after molten steel determines oxygen thermometric, ladle be hung to rh stove refining treatment, 1670 DEG C of temperature, calm when
Between 24min, after component content reaches requirement, upper continuous casting, then directly fill rolling described non-orientation silicon steel, Ingredients Weight
Percentage ratio is c:0.0032%, si:1.20%, mn:0.20%, p:0.013%, s:0.004%, v:0.006%, cr:0.10%, cu:
0.10%, ni:0.15%, ti:0.002%, b:0.0002%, nb:0.005%, n:0.0025%.
Embodiment 7
Smelt cgw600a non-orientation silicon steel, the chemical component weight percentage requirement of strand is as follows: c≤0.005%, si:
1.0～1.25%, mn:0.15%～0.25%, p≤0.040%, s≤0.006%, v≤0.006%, cr≤0.10%, cu≤0.20%,
Ni≤0.15%, ti≤0.003%, b≤0.0005%, nb≤0.005%, n≤0.0040%.
(1) vanadium extraction by converter blowing: from the vanadium-bearing hot metal of sulfur content≤0.030wt%, vanadium extraction adds low-sulfur coolant pelletizing, protects
Card half steel temperature, at 1342 DEG C, adds 1.1 tons of calcium-based desulfurizing agent before going out half steel in half ladle, obtains c:4.21%, v:
0.046% half steel containing vanadium；When converter extracting vanadium is tapped, add concurrent heating agent silicomangan 400kg/ stove in half steel；
(2) desulfurization: described steel-making half steel carries out desulfurization process, the injection time is 10min, granule magnesium amount 180kg, desulfurization
Obtain after end making steel half steel s:0.003wt%；
(3) pneumatic steelmaking: described steel-making half steel is blended into steelmaking converter and is blown, and in converting process, bottom-blowing of converter whole process is blown
Argon, bottom blowing intensity 0.06nm3/ min t, converter terminal composition by weight percent is c:0.03%；P:0.013%；S:0.005%；V:
0.001%；
Tapping process carries out deoxidation alloying operation according to terminal oxygen content, and deoxidizer uses aluminum, and addition is 0.24kg/
Ton steel, alloy uses low-carbon ferromanganese, and usage amount is 1.95kg/ ton steel.
Converter tapping implements slag-stopping tapping, and slag retaining cone is used cooperatively with slide plate pushing off the slag, controls slag retaining cone to add opportunity, in gear
During slag cone pushing off the slag success, close slide plate, prevent diffusing nitrogen pick-up, and be uniformly added into granule ash 450kg/ stove, tapping in tapping process
Afterwards, liquid steel sampling composition by weight percent is c:0.02%；Si:0.04%；Mn:0.16%；P:0.016%；S:0.004%；V:
0.0003%；N:0.0013%, buggy ladle is left and carries out determining oxygen thermometric to argon station, and liquid steel temperature is 1673 DEG C, and oxygen is 780ppm；
(4) rh refine: complete after molten steel determines oxygen thermometric, ladle be hung to rh stove refining treatment, 1673 DEG C of temperature, calm when
Between 30min, after component content reaches requirement, upper continuous casting, then directly fill rolling described non-orientation silicon steel, Ingredients Weight
Percentage ratio is c:0.0032%, si:1.20%, mn:0.20%, p:0.020%, s:0.005%, v:0.003%, cr:0.06%, cu:
0.20%, ni:0.10%, ti:0.003%, b:0.0005%, nb:0.004%, n:0.0015%.
Embodiment 8
Smelt cgw600a non-orientation silicon steel, the chemical component weight percentage requirement of strand is as follows: c≤0.005%, si:
1.0%～1.25%, mn:0.15%～0.25%, p≤0.040%, s≤0.006%, v≤0.006%, cr≤0.10%, cu≤
0.20%, ni≤0.15%, ti≤0.003%, b≤0.0005%, nb≤0.005%, n≤0.0040%.
(1) vanadium extraction by converter blowing: from the vanadium-bearing hot metal of sulfur content≤0.030wt%, vanadium extraction adds low-sulfur coolant Australia ore deposit, protects
Card half steel temperature, at 1346 DEG C, adds 1.4 tons of calcium-based desulfurizing agent before going out half steel in half ladle, obtains c:4.42%, v:
0.047% half steel containing vanadium；When converter extracting vanadium is tapped, add concurrent heating agent silicomangan 400kg/ stove in half steel；
(2) desulfurization: described steel-making half steel carries out desulfurization process, the injection time is 15min, granule magnesium amount 180kg, desulfurization
Obtain after end making steel half steel s:0.003wt%；
(3) pneumatic steelmaking: described steel-making half steel is blended into steelmaking converter and is blown, and in converting process, bottom-blowing of converter whole process is blown
Argon, bottom blowing intensity 0.04nm3/ min t, converter terminal composition by weight percent is c:0.03%；P:0.013%；S:0.003%；V:
0.001%；
Tapping process carries out deoxidation alloying operation according to terminal oxygen content, and deoxidizer uses aluminum, and addition is 0.20kg/
Ton steel, alloy uses low-carbon ferromanganese, and usage amount is 0.43kg/ ton steel.
Converter tapping implements slag-stopping tapping, and slag retaining cone is used cooperatively with slide plate pushing off the slag, controls slag retaining cone to add opportunity, in gear
During slag cone pushing off the slag success, close slide plate, prevent diffusing nitrogen pick-up, and be uniformly added into granule ash 380kg/ stove, tapping in tapping process
Afterwards, liquid steel sampling composition by weight percent is c:0.02%；Si:0.04%；Mn:0.15%；P:0.016%；S:0.006%；V:
0.0009%；N:0.0017%, buggy ladle is left and carries out determining oxygen thermometric to argon station, and liquid steel temperature is 1669 DEG C, and oxygen is 800ppm；
(4) rh refine: complete after molten steel determines oxygen thermometric, ladle be hung to rh stove refining treatment, 1669 DEG C of temperature, calm when
Between 20min, after component content reaches requirement, upper continuous casting, then directly fill rolling described non-orientation silicon steel, Ingredients Weight
Percentage ratio is c:0.003%, si:1.18%, mn:0.19%, p:0.016%, s:0.008%, v:0.002%, cr≤0.10%, cu≤
0.20%, ni≤0.15%, ti≤0.003%, b≤0.0005%, nb≤0.005%, n:0.0020%.
Embodiment 9
Smelt cgw600a non-orientation silicon steel, the chemical component weight percentage requirement of strand is as follows: c≤0.005%, si:
1.0～1.25%, mn:0.15%～0.25%, p≤0.040%, s≤0.006%, v≤0.006%, cr≤0.10%, cu≤0.20%,
Ni≤0.15%, ti≤0.003%, b≤0.0005%, nb≤0.005%, n≤0.0040%.
It is only described non-orientation silicon steel with embodiment 7 difference, composition by weight percent is c:0.005%, si:1.0%,
Mn:0.15%, p:0.040%, s:0.005%, v:0.006%, cr:0.08%, cu:0.15%, ni:0.10%, ti:0.002%, b:
0.0002%, nb:0.004%, n:0.0023%.
Embodiment 10
Smelt cgw600a non-orientation silicon steel, the chemical component weight percentage requirement of strand is as follows: c≤0.005%, si:
1.0～1.25%, mn:0.15%～0.25%, p≤0.040%, s≤0.006%, v≤0.006%, cr≤0.10%, cu≤0.20%,
Ni≤0.15%, ti≤0.003%, b≤0.0005%, nb≤0.005%, n≤0.0040%.
It is only described non-orientation silicon steel with embodiment 8 difference, composition by weight percent is c:0.0044%, si:1.25%,
Mn:0.15%, p:0.040%, s:0.004%, v:0.002%, cr:0.07%, cu:0.12%, ni:0.07%, ti:0.001%, b:
0.0004%, nb:0.005%, n:0.0015%.
Embodiment 11
Smelt cgw1000a non-orientation silicon steel, the chemical component weight percentage requirement of strand is as follows: c≤0.006%, si:
0.30～0.50%, mn:0.15～0.25%, p≤0.040%, s≤0.008%, v≤0.006%, cr≤0.10%, cu≤0.20%,
Ni≤0.15%, ti≤0.003%, b≤0.0005%, nb≤0.005%, n≤0.0040%.
(1) vanadium extraction by converter blowing: from the vanadium-bearing hot metal of sulfur content≤0.030wt%, vanadium extraction adds low-sulfur coolant Australia ore deposit, protects
Card half steel temperature, at 1350 DEG C, adds 1 ton of calcium-based desulfurizing agent before going out half steel in half ladle, obtains c:4.19%, v:
0.060% half steel containing vanadium；When converter extracting vanadium is tapped, add concurrent heating agent silicomangan 400kg/ stove in half steel；
(2) desulfurization: described steel-making half steel carries out desulfurization process, the injection time is 17min, granule magnesium amount 145kg, desulfurization
Obtain after end making steel half steel s:0.0025wt%；
(3) pneumatic steelmaking: described steel-making half steel is blended into steelmaking converter and is blown, and in converting process, bottom-blowing of converter whole process is blown
Argon, bottom blowing intensity 0.03nm3/ min t, converter terminal composition by weight percent is c:0.03%；P:0.019%；S:0.004%；V:
0.004%；
Tapping process carries out deoxidation alloying operation according to terminal oxygen content, and deoxidizer uses aluminum, and addition is 0.13kg/
Ton steel, alloy uses low-carbon ferromanganese, and usage amount is 2.78kg/ ton steel.
Converter tapping implements slag-stopping tapping, and slag retaining cone is used cooperatively with slide plate pushing off the slag, controls slag retaining cone to add opportunity, in gear
During slag cone pushing off the slag success, close slide plate, prevent diffusing nitrogen pick-up, and be uniformly added into granule ash 420kg/ stove, tapping in tapping process
Afterwards, liquid steel sampling composition by weight percent is c:0.03%；Si:0.004%；Mn:0.21%；P:0.020%；S:0.004%；V:
0.0004%；N:0.0022%, buggy ladle is left and carries out determining oxygen thermometric to argon station, and liquid steel temperature is 1701 DEG C, and oxygen is 795ppm；
(4) rh refine: complete after molten steel determines oxygen thermometric, ladle be hung to rh stove refining treatment, 1701 DEG C of temperature, calm when
Between 28min, after component content reaches requirement, upper continuous casting, then directly fill rolling described non-orientation silicon steel, Ingredients Weight
Percentage ratio is c:0.0048%, si:0.46%, mn:0.21%, p:0.020%, s:0.004%, v:0.006%, cr:0.10%, cu:
0.20%, ni:0.15%, ti:0.003%, b:0.0005%, nb:0.005%, n:0.0035%.
Embodiment 12
Smelt cgw1000a non-orientation silicon steel, the chemical component weight percentage requirement of strand is as follows: c≤0.006%, si:
0.30～0.50%, mn:0.15～0.25%, p≤0.040%, s≤0.008%, v≤0.006%, cr≤0.10%, cu≤0.20%,
Ni≤0.15%, ti≤0.003%, b≤0.0005%, nb≤0.005%, n≤0.0040%.
It is only described non-orientation silicon steel with embodiment 11 difference, composition by weight percent is c:0.006%, si:0.30%,
Mn:0.25%, p:0.040%, s:0.008%, v:0.004%, cr:0.07%, cu:0.12%, ni:0.07%, ti:0.001%, b:
0.0004%, nb:0.005%, n:0.0039%.
Embodiment 13
Smelt cgw1000a non-orientation silicon steel, the chemical component weight percentage requirement of strand is as follows: c≤0.006%, si:
0.30～0.50%, mn:0.15～0.25%, p≤0.040%, s≤0.008%, v≤0.006%, cr≤0.10%, cu≤0.20%,
Ni≤0.15%, ti≤0.003%, b≤0.0005%, nb≤0.005%, n≤0.0040%.
It is only described non-orientation silicon steel with embodiment 11 difference, composition by weight percent is c:0.0057%, si:
0.50%, mn:0.15%, p:0.040%, s:0.005%, v:0.002%, cr:0.07%, cu:0.12%, ni:0.07%, ti:
0.001%th, b:0.0004%, nb:0.005%, n:0.0033%.
Claims (8)
1. a kind of use hot metal containing V-Ti smelts the method for non-orientation silicon steel it is characterised in that carrying through converter using vanadium-bearing hot metal
Vanadium, desulfurization, pneumatic steelmaking, rh refine, sheet billet continuous casting operation obtain described non-orientation silicon steel, and specific embodiment is as follows:
(1) vanadium extraction by converter blowing: from the vanadium-bearing hot metal of sulfur content≤0.030wt%, vanadium extraction adds low-sulfur coolant it is ensured that half steel temperature
Degree is at 1330～1350 DEG C；Add 1～1.5 ton of calcium-based desulfurizing agent before going out half steel, obtain v≤0.060wt% in half ladle
Half steel containing vanadium；
(2) desulfurization: described half steel containing vanadium carries out desulfurization process, the injection time is 6-20min, granule magnesium amount 50-200kg, desulfurization
After end, obtain making steel half steel sulfur content s≤0.0030%；
(3) pneumatic steelmaking: described steel-making half steel is blended into steelmaking converter and is blown, bottom-blowing of converter whole process Argon in converting process,
And ensure bottom blowing intensity >=0.03nm3/mint；Tapping process carries out deoxidation alloying operation according to terminal oxygen content, in tapping
During be uniformly added into deoxidizer, alloy successively it is ensured that material fully melts and molten steel composition is uniform；Converter tapping implements gear
Slag is tapped, and slag retaining cone is used cooperatively with slide plate pushing off the slag, controls slag retaining cone to add opportunity, in slag retaining cone pushing off the slag success, closes and slides
Plate, prevents diffusing nitrogen pick-up, drives buggy ladle and carry out determining oxygen thermometric to argon station after tapping；
(4) rh refine: complete after molten steel determines oxygen thermometric, ladle to be hung to rh stove refining treatment, temperature >=1650 DEG C, calm time
>=20min, after component content reaches requirement, upper continuous casting, then directly fill rolling described non-orientation silicon steel；
Described non-orientation silicon steel percentage composition is as follows: c≤0.008%, si:0.3～0.5%, mn:0.15～0.25%, and p≤
0.040%, s≤0.008%, v≤0.006%, cr≤0.10%, cu≤0.20%, ni≤0.15%, ti≤0.003%, b≤
0.0005%, nb≤0.005%, n≤0.0040%, balance of ferrum and inevitable impurity component.
2. a kind of use hot metal containing V-Ti smelts the method for non-orientation silicon steel it is characterised in that carrying through converter using vanadium-bearing hot metal
Vanadium, desulfurization, pneumatic steelmaking, rh refine, sheet billet continuous casting operation obtain described non-orientation silicon steel, and specific embodiment is as follows:
(1) vanadium extraction by converter blowing: from the vanadium-bearing hot metal of sulfur content≤0.030wt%, vanadium extraction adds low-sulfur coolant it is ensured that half steel temperature
Degree is at 1330～1350 DEG C；Add 1～1.5 ton of calcium-based desulfurizing agent before going out half steel, obtain v≤0.060wt% in half ladle
Half steel containing vanadium；Carry out desulfurization after vanadium-bearing hot metal vanadium extraction, make steel half steel sulfur content≤0.03wt%；Described low-sulfur coolant is Australia
Ore deposit, pelletizing, coolant sulfur content≤0.03%;
(2) desulfurization: described half steel containing vanadium carries out desulfurization process, the injection time is 6-20min, granule magnesium amount 50-200kg, desulfurization
After end, obtain making steel half steel sulfur content s≤0.0030%；
(3) pneumatic steelmaking: described steel-making half steel is blended into steelmaking converter and is blown, bottom-blowing of converter whole process Argon in converting process,
And ensure bottom blowing intensity >=0.03nm3/mint；Tapping process carries out deoxidation alloying operation according to terminal oxygen content, in tapping
During be uniformly added into deoxidizer, alloy successively it is ensured that material fully melts and molten steel composition is uniform；Converter tapping implements gear
Slag is tapped, and slag retaining cone is used cooperatively with slide plate pushing off the slag, controls slag retaining cone to add opportunity, in slag retaining cone pushing off the slag success, closes and slides
Plate, prevents diffusing nitrogen pick-up, drives buggy ladle and carry out determining oxygen thermometric to argon station after tapping；
(4) rh refine: complete after molten steel determines oxygen thermometric, ladle to be hung to rh stove refining treatment, temperature >=1650 DEG C, calm time
>=20min, after component content reaches requirement, upper continuous casting, then directly fill rolling described non-orientation silicon steel.
3. a kind of use hot metal containing V-Ti smelts the method for non-orientation silicon steel it is characterised in that carrying through converter using vanadium-bearing hot metal
Vanadium, desulfurization, pneumatic steelmaking, rh refine, sheet billet continuous casting operation obtain described non-orientation silicon steel, and specific embodiment is as follows:
(1) vanadium extraction by converter blowing: from the vanadium-bearing hot metal of sulfur content≤0.030wt%, vanadium extraction adds low-sulfur coolant it is ensured that half steel temperature
Degree is at 1330～1350 DEG C；Add 1～1.5 ton of calcium-based desulfurizing agent before going out half steel, obtain v≤0.060wt% in half ladle
Half steel containing vanadium；
(2) desulfurization: described half steel containing vanadium carries out desulfurization process, the injection time is 6-20min, granule magnesium amount 50-200kg, desulfurization
After end, obtain making steel half steel sulfur content s≤0.0030%；
(3) pneumatic steelmaking: described steel-making half steel is blended into steelmaking converter and is blown, bottom-blowing of converter whole process Argon in converting process,
And ensure bottom blowing intensity >=0.03nm3/mint；Tapping process carries out deoxidation alloying operation according to terminal oxygen content, in tapping
During be uniformly added into deoxidizer, alloy successively it is ensured that material fully melts and molten steel composition is uniform；Converter tapping implements gear
Slag is tapped, and slag retaining cone is used cooperatively with slide plate pushing off the slag, controls slag retaining cone to add opportunity, in slag retaining cone pushing off the slag success, closes and slides
Plate, prevents diffusing nitrogen pick-up, drives buggy ladle and carry out determining oxygen thermometric to argon station after tapping；Converter terminal s≤0.003wt%, p:
0.015～0.030wt%, c:0.03～0.05wt%；
(4) rh refine: complete after molten steel determines oxygen thermometric, ladle to be hung to rh stove refining treatment, temperature >=1650 DEG C, calm time
>=20min, after component content reaches requirement, upper continuous casting, then directly fill rolling described non-orientation silicon steel.
4. the method that a kind of use hot metal containing V-Ti according to Claims 2 or 3 smelts non-orientation silicon steel, its feature exists
In described non-orientation silicon steel percentage composition is as follows: c≤0.006%, si:0.70～0.90%, mn:0.15～0.25%, p≤
0.040%, s≤0.008%, v≤0.006%, cr≤0.10%, cu≤0.20%, ni≤0.15%, ti≤0.003%, b≤
0.0005%, nb≤0.005%, n≤0.0040%, balance of ferrum and inevitable impurity component.
5. a kind of use hot metal containing V-Ti according to claim 4 smelts the method for non-orientation silicon steel it is characterised in that institute
State in step (1), when converter goes out carburetting half steel, add concurrent heating agent 200～400kg/ stove in half steel it is ensured that half steel is being smelted
During heat；Concurrent heating agent is one or more of ferrosilicon, silicomangan.
6. the method that a kind of use hot metal containing V-Ti according to claim 4 any one smelts non-orientation silicon steel, it is special
Levy and be, in described step (3), obtain the molten steel of argon station oxygen 600-800ppm.
7. the method that a kind of use hot metal containing V-Ti according to claim 4 any one smelts non-orientation silicon steel, it is special
Levy and be, in described step (3), deoxidizer is aluminum, and addition is 0.13-0.26kg/t steel；Alloy uses low-carbon ferromanganese, uses
Measure as 1.98-2.78kg/ ton steel.
8. the method that a kind of use hot metal containing V-Ti according to claim 4 any one smelts non-orientation silicon steel, it is special
Levy and be, in described step (3), be uniformly added into granule ash 300-500kg/ stove in tapping process.
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| CN109022664B (en) * | 2018-08-08 | 2020-09-08 | 河钢股份有限公司承德分公司 | Method for smelting Ti-IF steel by using vanadium-titanium-containing molten iron |
| CN109797264A (en) * | 2019-01-14 | 2019-05-24 | 包头钢铁（集团）有限责任公司 | A kind of control method and silicon steel production method of silicon steel Ti content |
| CN110819755A (en) * | 2019-12-25 | 2020-02-21 | 承德建龙特殊钢有限公司 | Method for desulfurization during vanadium extraction and tapping of converter |
| CN111560557A (en) * | 2020-05-29 | 2020-08-21 | 鞍钢股份有限公司 | Process for controlling titanium and reducing titanium of non-oriented silicon steel |
| CN112593048A (en) * | 2020-12-09 | 2021-04-02 | 攀钢集团西昌钢钒有限公司 | Semisteel desulfurization method |
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Address after: 067102 A block 520, Luanhe town finance square, Shuangluan District, Chengde, Hebei Patentee after: CHENGDE BRANCH OF HBIS Group Address before: 067102 Luanhe town finance square, Shuangluan District, Chengde, Hebei, Hebei iron and steel Limited by Share Ltd Chengde branch Patentee before: HEBEI IRON AND STEEL Co.,Ltd. CHENGDE BRANCH |
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