CN109988885A - Production method of low-carbon killed steel - Google Patents
Production method of low-carbon killed steel Download PDFInfo
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- CN109988885A CN109988885A CN201910397891.1A CN201910397891A CN109988885A CN 109988885 A CN109988885 A CN 109988885A CN 201910397891 A CN201910397891 A CN 201910397891A CN 109988885 A CN109988885 A CN 109988885A
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- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 145
- 229910000655 Killed steel Inorganic materials 0.000 title claims abstract description 44
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 30
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 118
- 239000010959 steel Substances 0.000 claims abstract description 118
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 105
- 239000002893 slag Substances 0.000 claims abstract description 69
- 238000000034 method Methods 0.000 claims abstract description 40
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims abstract description 24
- 235000011941 Tilia x europaea Nutrition 0.000 claims abstract description 24
- 239000004571 lime Substances 0.000 claims abstract description 24
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 20
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 20
- 238000010438 heat treatment Methods 0.000 claims abstract description 19
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 14
- 239000010703 silicon Substances 0.000 claims abstract description 14
- 239000000463 material Substances 0.000 claims abstract description 6
- 238000010891 electric arc Methods 0.000 claims abstract description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 17
- 229910001570 bauxite Inorganic materials 0.000 claims description 16
- 229910000519 Ferrosilicon Inorganic materials 0.000 claims description 13
- 229920001296 polysiloxane Polymers 0.000 claims description 10
- 238000005275 alloying Methods 0.000 claims description 9
- 238000009491 slugging Methods 0.000 claims description 4
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical group [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 claims description 3
- 238000005266 casting Methods 0.000 claims description 3
- 239000000571 coke Substances 0.000 claims description 3
- 238000006477 desulfuration reaction Methods 0.000 claims description 3
- 230000023556 desulfurization Effects 0.000 claims description 3
- 239000010436 fluorite Substances 0.000 claims description 3
- 239000003208 petroleum Substances 0.000 claims 1
- 238000009835 boiling Methods 0.000 abstract description 9
- 238000010079 rubber tapping Methods 0.000 abstract description 8
- 230000003749 cleanliness Effects 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 20
- 240000006909 Tilia x europaea Species 0.000 description 20
- 239000001301 oxygen Substances 0.000 description 11
- 229910052760 oxygen Inorganic materials 0.000 description 11
- 229910052786 argon Inorganic materials 0.000 description 10
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 9
- 238000007670 refining Methods 0.000 description 7
- 239000004411 aluminium Substances 0.000 description 6
- 238000002845 discoloration Methods 0.000 description 5
- 239000011521 glass Substances 0.000 description 5
- 238000009628 steelmaking Methods 0.000 description 5
- ULGYAEQHFNJYML-UHFFFAOYSA-N [AlH3].[Ca] Chemical compound [AlH3].[Ca] ULGYAEQHFNJYML-UHFFFAOYSA-N 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- OSMSIOKMMFKNIL-UHFFFAOYSA-N calcium;silicon Chemical compound [Ca]=[Si] OSMSIOKMMFKNIL-UHFFFAOYSA-N 0.000 description 2
- 238000006392 deoxygenation reaction Methods 0.000 description 2
- 238000003359 percent control normalization Methods 0.000 description 2
- 239000002006 petroleum coke Substances 0.000 description 2
- 239000005997 Calcium carbide Substances 0.000 description 1
- 206010054949 Metaplasia Diseases 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000015689 metaplastic ossification Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- CLZWAWBPWVRRGI-UHFFFAOYSA-N tert-butyl 2-[2-[2-[2-[bis[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]amino]-5-bromophenoxy]ethoxy]-4-methyl-n-[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]anilino]acetate Chemical compound CC1=CC=C(N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)C(OCCOC=2C(=CC=C(Br)C=2)N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)=C1 CLZWAWBPWVRRGI-UHFFFAOYSA-N 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/06—Deoxidising, e.g. killing
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The invention relates to a production method of low-carbon killed steel, wherein the mass percentage of the upper limit of the carbon content of the low-carbon killed steel is 0.10-0.25%, carbon is left in a converter for boiling tapping, and the mass percentage of the carbon content at the end point is controlled according to that C is more than or equal to 0.05% and less than or equal to-0.03% of the upper limit of the finished product carbon; after molten steel in a boiling state enters an LF furnace treatment position, firstly adding a first batch of slag material to dilute the oxidability of top slag in a molten steel tank, and then adding a carbon deoxidizer; heating the electrode, and deoxidizing the carbide slag at high temperature by using lime, a carbon deoxidizer and an electric arc. The advantages are that: the method is carried out in an LF furnace under normal pressure. The carbon deoxidizer is used to replace partial silicon and aluminum as deoxidizer, so that the cost is reduced. Compared with the silicon deoxidation process and the aluminum deoxidation process which are commonly used at present, the cost per ton of steel can be reduced by 10-20 yuan. Meanwhile, the carbon deoxidation does not leave deoxidation product residues in the molten steel, and is beneficial to improving the cleanliness of the molten steel.
Description
Technical field
The invention belongs to mild steel production field more particularly to a kind of production methods of low-carbon killed steel.
Background technique
In conventional method for making steel, especially production low-carbon killed steel, deoxidation mainly rely on silicon, aluminium etc. and oxygen affinity and
The power member bigger than iron is usually completed.These elements are acted on the oxygen being dissolved in molten steel, generate the deoxidation products insoluble in molten steel,
Due to they emersion and reduce oxygen content.
Carbon deoxidization technique is mainly used under vacuum condition, using vacuum refining devices such as RH, VD, carbon and oxygen occurs anti-
It answers.Under vacuum conditions, carbon superfluous in molten steel can be acted on oxygen occurs reaction between carbon and oxygen, and the oxygen in molten steel is made to become CO row
It removes, at this moment carbon becomes deoxidier under vacuum conditions, its deoxidizing capacity enhances with the raising of vacuum degree.But use vacuum item
Part progress carbon deoxidation is at high cost, is usually used in ultra-low-carbon steel and has the steel grades such as the high-grade pipe line steel of particular/special requirement to gas content.
Under normal pressure, low-carbon killed steel is produced, it is general to be closed using the addition Si system alloy in converter tapping process or aluminium system
Golden deoxidation makes to enter refining treatment after molten steel is calm.Also have and a small amount of carburant progress just deoxidation be added in converter tapping process,
Then carry out silicon deoxidation or aluminium deoxidation and Alloying Treatment.But such method top slag bubble level is not easy to control, slag risk of overflowing
Greatly.And low-carbon killed steel is produced using silicon deoxidation or aluminium deoxidation at present, production cost is also higher.
Summary of the invention
In order to overcome the deficiencies of the prior art, the object of the present invention is to provide a kind of production methods of low-carbon killed steel, use
Carbon deoxidization technique under normal pressure produces the finished product carbon content upper limit in 0.10%~0.25% low-carbon killed steel, utilizes carbon deoxidation
The high temperature of agent, lime and electrode heating makes carbide slag deoxidation, improves heating efficiency, reduces the consumption of deoxidier, reduce alloy at
This, reduces Al2O3Generation, improve Cleanliness of Molten Steel.
To achieve the above object, the invention is realized by the following technical scheme:
A kind of production method of low-carbon killed steel, the mass percent of the carbon content upper limit of the low-carbon killed steel are
0.10%~0.25%, comprising the following steps:
1) it makes steel
A converter stays carbon boil to tap, and endpoint carbon content mass percent presses 0.05%≤C≤finished product carbon upper limit -0.03%
Control；
B molten steel tank emptying is controlled in 400mm-600mm；
2) it refines
After molten steel under a fluidized state handles position into LF furnace, first batch of slag charge is added first to dilute the oxygen for pushing up slag in ladle
Carbon deoxidier is added in the property changed later；
The heating of b electrode, makes carbide slag deoxidation using the high temperature of lime and carburant and electric arc, two is added in temperature-rise period
Slag charge is criticized, the control of the weight ratio of lime and slagging agent is in 4:1~5:1 in two batches of slag charges；Two batches of slag charge amount controls are at 0-6kg/ tons
Steel；
After c heating, deoxidier final deoxidizing is added, desulfurization, takes process sample, according to process sample alloying, eventually be tuned into point and on
Machine casting.
Slagging agent described in step 2) is fluorite or bauxite or with bauxite slugging material as main component；Carbon is de-
Oxygen agent is coke carburant or petroleum coke carburant.
First batch of slag charge and its additional amount described in a are 4~5kg/ of lime tons of steel and 2~2.5kg/ tons of slagging agent in step 2)
Steel；Carbon deoxidier additional amount are as follows: molten steel amount × (carbon content -0.01% in the finished product carbon upper limit-molten steel)/carbon deoxidier carbon contains
Amount.
When deoxidier described in c is aluminum steel section in step 2), the low-carbon killed steel of production is carbon aluminium-killed steel；Added head
The quantity for criticizing aluminum steel section is 1.1~1.9kg/ tons of steel.
When deoxidier described in c is ferrosilicon in step 2), the low-carbon killed steel of production is low-carbon Si killed steel；Institute after heating
Add the quantity of first batch of ferrosilicon: molten steel amount × (silicone content in the finished silicon upper limit-molten steel)/ferrosilicon silicone content.
Compared with prior art, the beneficial effects of the present invention are:
1, it is carried out in the LF furnace of carbon deoxygenation mainly under normal pressure in a kind of production method of low-carbon killed steel.It utilizes
Carbon deoxidier replaces part silicon, aluminium as deoxidier, cheap, reduces costs.With currently used silicon deoxidization technique
It is compared with aluminium deoxidation technique, ton steel cost can reduce 10-20 member.Meanwhile carbon deoxidation remains in molten steel without deoxidation products, has
Conducive to raising Cleanliness of Molten Steel.
2, the present invention utilizes existing equipment, enters LF furnace using boiling molten steel, and under fluidized state into molten steel
Carbon deoxidier, lime and slagging agent is added, makes carbide slag deoxidation using the high temperature that carbon deoxidier, lime and electrode heat up.
3, the ratio for controlling LF furnace first batch of slag charge lime and slagging agent is conducive to the calcium carbide generated during carbon deoxygenation
Slag submerged arc works well, and can be improved electrode heating efficiency.Using electrode heating mode, LF furnace heating rate is by 3-5 DEG C/min
It is increased to 4-6 DEG C/min.
4, in LF process, carbon deoxidier is added into boiling molten steel, is easy to appear excessive slag.The present invention is used and is first added
Slag charge, to dilute the oxidisability for pushing up slag in ladle, to eliminate the excessive slag risk that carbon deoxidier is added；Make carbon deoxidization technique
It can satisfy normal production requirement.
5, the present invention can be improved the accuracy of LF furnace aluminum deoxidation agent for the first time, avoid due to aluminum deoxidation agent for the first time is inaccurate
The phenomenon that multiple aluminum deoxidation agent occurred.Quality to guarantee LF furnace after treatment molten steel is stable steady with the production of LF furnace
It is fixed.
6, the molten steel in LF furnace treatment process can be reduced using the present invention and returns silicon, it being capable of the steady production finished silicon upper limit
0.03% low Si killed steel.
7, LF furnace operation is affected by LF furnace superintendent experience and into the case where LF furnace molten steel, and the present invention makes the operation mould of LF furnace
Formula, the influence for reducing human factor and operating into the case where LF furnace molten steel to LF furnace, is advantageously implemented the intelligent metaplasia of LF furnace
It produces.
Specific embodiment
The present invention is described in detail below, it should be noted that implementation of the invention embodiment party not limited to the following
Formula.
A kind of production method of low-carbon killed steel, the mass percent of the carbon content upper limit of the low-carbon killed steel are
0.10%~0.25%, comprising the following steps:
1) it makes steel
A converter stays carbon boil to tap, and endpoint carbon content mass percent presses 0.05%≤C≤finished product carbon upper limit -0.03%
Control；
B molten steel tank emptying is controlled in 300mm-600mm；
2) it refines
After molten steel under a fluidized state handles position into LF furnace, first batch of slag charge is added first to dilute the oxygen for pushing up slag in ladle
Carbon deoxidier is added in the property changed later；
B electrode heats up 5~10 minutes, makes carbide slag deoxidation using the high temperature of lime and carbon deoxidier and electric arc, is rising
Two batches of slag charges are added during temperature, the control of the weight ratio of lime and slagging agent is in 4:1~5:1 in two batches of slag charges；Two batches of slag charge amounts
Control is in 0-6kg/ tons of steel；
After c heating, deoxidier final deoxidizing is added, desulfurization, takes process sample, according to process sample alloying, eventually be tuned into point and on
Machine casting.
Slagging agent described in step 2) is fluorite or bauxite or with bauxite slugging material as main component；Carbon is de-
Oxygen agent is coke carburant or petroleum coke carburant.
First batch of slag charge and its additional amount described in a are 4~5kg/ of lime tons of steel and 2~2.5kg/ tons of slagging agent in step 2)
Steel；Carbon deoxidier additional amount are as follows: molten steel amount × (carbon content -0.01% in the finished product carbon upper limit-molten steel)/carbon deoxidier carbon contains
Amount.
When deoxidier described in c is aluminum steel section in step 2), the low-carbon killed steel of production is carbon aluminium-killed steel；Added head
The quantity for criticizing aluminum steel section is 1.1~1.9kg/ tons of steel, and limit for height removes the limit value, the low capping value of the finished product carbon upper limit on finished product carbon.
When deoxidier described in c is ferrosilicon in step 2), the low-carbon killed steel of production is low-carbon Si killed steel；Institute after heating
Add the quantity of first batch of ferrosilicon: molten steel amount × (silicone content in the finished silicon upper limit-molten steel)/ferrosilicon silicone content.
Embodiment one
A kind of production method of low-carbon killed steel, the mass percent of the carbon content upper limit of the low-carbon killed steel are
0.10%, comprising the following steps:
1, steel making working procedure
1) endpoint carbon content of converter is 0.05%；
2) boiling tapping, big tank headroom are 400mm.
2, refining procedure
1) it after molten steel handles position into LF furnace, is added slag charge (4kg/ tons of steel limes, the bauxite of 2kg/ tons of steel), it is complete to slag charge
Carbon deoxidier is added after running down, carbon deoxidier additional amount is molten steel amount × (carbon content-in the finished product carbon upper limit-molten steel
0.01%)/carbon deoxidier carbon content；.
2) electrode heats up 9 minutes, Argon amount: 200L/min.
3) in temperature-rise period, remaining slag charge is added, in remaining slag charge lime and bauxite be respectively 2kg/ tons of steel and
0.5kg/ tons of steel；
4) additional amount of first batch of aluminum steel section is 1.8kg/ tons of steel after heating up.
5) viscous in time to take slag specimen, when slag specimen discoloration and it is in light green color or transparent glass slag, process sample can be taken, according to process
Sample is tuned into point eventually.
6) the aluminium calcium line of 2m/ tons of steel, net Argon 3 minutes upper machines are fed after molten steel alloying.
Embodiment two
A kind of production method of low-carbon killed steel, the mass percent of the carbon content upper limit of the low-carbon killed steel are
0.15%, comprising the following steps:
1, steel making working procedure
1) endpoint carbon content of converter is 0.06%；
2) boiling tapping, big tank headroom are 500mm.
2, refining procedure
1) it after molten steel handles position into LF furnace, is added slag charge (4.5kg/ tons of steel limes, the bauxite of 2.3kg/ tons of steel), to slag
Carbon deoxidier is added in material after being completely melt, carbon deoxidier additional amount is molten steel amount × (carbon contains in the finished product carbon upper limit-molten steel
Amount -0.01%)/carbon deoxidier carbon content；.
2) electrode heats up 8 minutes, Argon amount: 260L/min.
3) in temperature-rise period, remaining slag charge is added, in remaining slag charge lime and bauxite be respectively 1.5kg/ tons of steel and
0.3kg/ tons of steel；
4) additional amount of first batch of aluminum steel section is 1.5kg/ tons of steel after heating up.
5) viscous in time to take slag specimen, when slag specimen discoloration and it is in light green color or transparent glass slag, process sample can be taken, according to process
Sample is tuned into point eventually.
6) the aluminium calcium line of 2.5m/ tons of steel, net Argon 3 minutes upper machines are fed after molten steel alloying.
Embodiment three
A kind of production method of low-carbon killed steel, the mass percent of the carbon content upper limit of the low-carbon killed steel are
0.24%, comprising the following steps:
1, steel making working procedure
1) endpoint carbon content of converter is 0.09%；
2) boiling tapping, big tank headroom are 600mm.
2, refining procedure
1) it after molten steel handles position into LF furnace, is added slag charge (5kg/ tons of steel limes, the bauxite of 2.5kg/ tons of steel), to slag charge
Carbon deoxidier is added after being completely melt, carbon deoxidier additional amount is molten steel amount × (carbon content-in the finished product carbon upper limit-molten steel
0.01%)/carbon deoxidier carbon content；.
2) electrode heats up 10 minutes, Argon amount: 300L/min.
3) in temperature-rise period, remaining slag charge is added, in remaining slag charge lime and bauxite be respectively 3kg/ tons of steel and
0.7kg/ tons of steel；
4) additional amount of first batch of aluminum steel section is 1.2kg/ tons of steel after heating up.
5) viscous in time to take slag specimen, when slag specimen discoloration and it is in light green color or transparent glass slag, process sample can be taken, according to process
Sample is tuned into point eventually.
6) the aluminium calcium line of 3m/ tons of steel, net Argon 3 minutes upper machines are fed after molten steel alloying.
Example IV
A kind of production method of low-carbon killed steel, the mass percent of the carbon content upper limit of the low-carbon killed steel are
0.12%, comprising the following steps:
1, steel making working procedure
1) endpoint carbon content of converter is 0.06%；
2) boiling tapping, big tank headroom are 500mm.
2, refining procedure
1) it after molten steel handles position into LF furnace, is added slag charge (4kg/ tons of steel limes, the bauxite of 2kg/ tons of steel), it is complete to slag charge
Carbon deoxidier is added after running down, carbon deoxidier additional amount is molten steel amount × (carbon content-in the finished product carbon upper limit-molten steel
0.01%)/carbon deoxidier carbon content；.
2) electrode heats up 9 minutes, Argon amount: 230L/min.
3) in temperature-rise period, remaining slag charge is added, in remaining slag charge lime and bauxite be respectively 2kg/ tons of steel and
0.4kg/ tons of steel；
4) ferrosilicon additional amount is molten steel amount × (silicone content in the finished silicon upper limit-molten steel)/ferrosilicon silicone content after heating up.
5) viscous in time to take slag specimen, when slag specimen discoloration and it is in light green color or transparent glass slag, process sample can be taken, according to process
Sample is tuned into point eventually.
6) silicon-calcium wire of 2m/ tons of steel, net Argon 3 minutes upper machines are fed after molten steel alloying.
Embodiment five
A kind of production method of low-carbon killed steel, the mass percent of the carbon content upper limit of the low-carbon killed steel are
0.20%, comprising the following steps:
1, steel making working procedure
1) endpoint carbon content of converter is 0.12%；
2) boiling tapping, big tank headroom are 400mm.
2, refining procedure
1) it after molten steel handles position into LF furnace, is added slag charge (4.3kg/ tons of steel limes, the bauxite of 2.2kg/ tons of steel), to slag
Carbon deoxidier is added in material after being completely melt, carbon deoxidier additional amount is molten steel amount × (carbon contains in the finished product carbon upper limit-molten steel
Amount -0.01%)/carbon deoxidier carbon content；.
2) electrode heats up 8 minutes, Argon amount: 270L/min.
3) in temperature-rise period, remaining slag charge is added, in remaining slag charge lime and bauxite be respectively 2.5kg/ tons of steel and
0.5kg/ tons of steel；
4) ferrosilicon additional amount is molten steel amount × (silicone content in the finished silicon upper limit-molten steel)/ferrosilicon silicone content after heating up.
5) viscous in time to take slag specimen, when slag specimen discoloration and it is in light green color or transparent glass slag, process sample can be taken, according to process
Sample is tuned into point eventually.
6) silicon-calcium wire of 1.5m/ tons of steel, net Argon 3 minutes upper machines are fed after molten steel alloying.
Claims (5)
1. a kind of production method of low-carbon killed steel, which is characterized in that the quality hundred of the carbon content upper limit of the low-carbon killed steel
Divide than being 0.10%~0.25%, comprising the following steps:
1) it makes steel
A converter stays carbon boil to tap, and endpoint carbon content mass percent is controlled by 0.05%≤C≤finished product carbon upper limit -0.03%；
B molten steel tank emptying is controlled in 400mm-600mm；
2) it refines
After molten steel under a fluidized state handles position into LF furnace, first batch of slag charge is added first to dilute the oxidisability for pushing up slag in ladle,
Carbon deoxidier is added later；
The heating of b electrode, makes carbide slag deoxidation using the high temperature of lime and carburant and electric arc, and two batches of slags are added in temperature-rise period
Expect, the control of the weight ratio of lime and slagging agent is in 4:1~5:1 in two batches of slag charges；Two batches of slag charge amount controls are in 0-6kg/ tons of steel；
After c heating, deoxidier final deoxidizing is added, desulfurization, takes process sample, according to process sample alloying, is tuned into point eventually and upper machine pours
Casting.
2. a kind of production method of low-carbon killed steel according to claim 1, which is characterized in that slugging described in step 2)
Agent is fluorite or bauxite or with bauxite slugging material as main component；Carbon deoxidier is coke carburant or petroleum
Burnt carburant.
3. a kind of production method of low-carbon killed steel according to claim 1, which is characterized in that in step 2) described in a
First batch of slag charge and its additional amount are 2~2.5kg/ tons of steel of 4~5kg/ of lime tons of steel and slagging agent；Carbon deoxidier additional amount are as follows:
Molten steel amount × (carbon content -0.01% in the finished product carbon upper limit-molten steel)/carbon deoxidier carbon content.
4. a kind of production method of low-carbon killed steel according to claim 1, which is characterized in that in step 2) described in c
When deoxidier is aluminum steel section, the low-carbon killed steel of production is carbon aluminium-killed steel；The quantity of added first batch of aluminum steel section be 1.1~
1.9kg/ tons of steel.
5. a kind of production method of low-carbon killed steel according to claim 1, which is characterized in that in step 2) described in c
When deoxidier is ferrosilicon, the low-carbon killed steel of production is low-carbon Si killed steel；The quantity of added first batch of ferrosilicon after heating: molten steel amount
× (silicone content in the finished silicon upper limit-molten steel)/ferrosilicon silicone content.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113088628A (en) * | 2021-03-31 | 2021-07-09 | 山东钢铁股份有限公司 | LF refining method of low-carbon steel |
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| JPH0356614A (en) * | 1989-07-26 | 1991-03-12 | Kawasaki Steel Corp | Production of low-oxygen dead-soft carbon steel |
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