CN106282478A - A kind of production method of low-phosphorous half steel - Google Patents
A kind of production method of low-phosphorous half steel Download PDFInfo
- Publication number
- CN106282478A CN106282478A CN201610807151.7A CN201610807151A CN106282478A CN 106282478 A CN106282478 A CN 106282478A CN 201610807151 A CN201610807151 A CN 201610807151A CN 106282478 A CN106282478 A CN 106282478A
- Authority
- CN
- China
- Prior art keywords
- blowing
- steel
- half steel
- low
- production method
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 82
- 239000010959 steel Substances 0.000 title claims abstract description 82
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 26
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 102
- 229910052720 vanadium Inorganic materials 0.000 claims abstract description 70
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 claims abstract description 70
- 238000007664 blowing Methods 0.000 claims abstract description 53
- 229910052742 iron Inorganic materials 0.000 claims abstract description 47
- 239000002893 slag Substances 0.000 claims abstract description 42
- 238000009628 steelmaking Methods 0.000 claims abstract description 32
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 19
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 19
- 239000001301 oxygen Substances 0.000 claims abstract description 19
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 6
- 238000004886 process control Methods 0.000 claims abstract description 3
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 10
- 239000008188 pellet Substances 0.000 claims description 3
- 229910052681 coesite Inorganic materials 0.000 claims description 2
- 229910052906 cristobalite Inorganic materials 0.000 claims description 2
- 239000000377 silicon dioxide Substances 0.000 claims description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 2
- 238000005245 sintering Methods 0.000 claims description 2
- 229910052682 stishovite Inorganic materials 0.000 claims description 2
- 229910052905 tridymite Inorganic materials 0.000 claims description 2
- 238000000605 extraction Methods 0.000 abstract description 28
- 238000003723 Smelting Methods 0.000 abstract description 7
- 229910052751 metal Inorganic materials 0.000 abstract description 5
- 239000002184 metal Substances 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract description 4
- 238000007796 conventional method Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 28
- 229910052698 phosphorus Inorganic materials 0.000 description 19
- 239000011574 phosphorus Substances 0.000 description 19
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 18
- 230000008569 process Effects 0.000 description 10
- 239000003795 chemical substances by application Substances 0.000 description 5
- 150000001875 compounds Chemical class 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000002826 coolant Substances 0.000 description 3
- 230000004907 flux Effects 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 238000010079 rubber tapping Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 241000251468 Actinopterygii Species 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical group [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 239000011324 bead Substances 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 230000035800 maturation Effects 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 241001062472 Stokellia anisodon Species 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 229910001570 bauxite Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000009194 climbing Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 150000003388 sodium compounds Chemical class 0.000 description 1
- 159000000000 sodium salts Chemical class 0.000 description 1
- 238000003756 stirring Methods 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
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/30—Regulating or controlling the blowing
-
- 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
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/36—Processes yielding slags of special composition
-
- 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
-
- 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
- C21C7/064—Dephosphorising; Desulfurising
-
- 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
- C21C2007/0093—Duplex process; Two stage processes
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The invention belongs to field of iron and steel smelting, be specifically related to the production method of a kind of low-phosphorous half steel.It is an object of the invention to solve the problem that conventional method vanadium extraction from hot metal dephosphorization rate is relatively low, and reduce TFe content in vanadium slag, thus reduce steel technology and provide low-phosphorous half steel for steelmaking converter.The production method of a kind of low-phosphorous half steel of the present invention, comprises the following steps: after A, converter extracting vanadium have converted ferrum, and fall oxygen rifle blows, and whole-process control oxygen flow is 1.5～3.0Nm3/ t.min, bottom blowing nitrogen intensity is 0.2～0.4Nm3/t.min；B, blowing are initially added into steelmaking converter finishing slag, and before blowing, 2min presses control rifle position, more than benchmark rifle position 10～30mm；Iron scale or other high oxides-containing iron is added after blowing 1～2min；Press benchmark rifle position after blowing 2min to control；Before finishing blowing, 2min presses control rifle position, more than benchmark rifle position 30～50mm；Half steel and vanadium slag is gone out after C, finishing blowing.
Description
Technical field
The invention belongs to field of iron and steel smelting, be specifically related to the production method of a kind of low-phosphorous half steel.
Background technology
Phosphorus is the harmful element in most steel grade.In recent years, along with scientific and technical develops rapidly, cryogenic steel,
Marine steel, anti-hydrogen induced cracking steel and part slab steel, should have extremely low sulfur content, also require that phosphorus content ＜ in steel
0.01% or 0.005%.1980, since the age, for molten iron pre-dephosphorization problem, develop various processing method, most represented
Property have two kinds: a kind of is to carry out dephosphorization in containing the ladle of molten iron or fish torpedo ladle, and another kind is to carry out molten iron in converter
Dephosphorizing pretreatment, both approaches has all obtained commercial Application.Ladle or fish torpedo ladle dephosphorization mainly have that temperature drop is relatively big, oxygen blast is mended
Splash especially severe again when repaying temperature drop, the impact of ferrum treatment time of water length produces the problems such as direct motion, and applicable cases is undesirable.And converter
Pre-dephosphorization realizes industrial-scale production in the iron and steel enterprise of Japan and Korea S, and China Baosteel, Wuhan Iron and Steel Plant etc. are producing Low-phosphorus Steel
Time, use the duplex dephosphorized technique of twin furnace to smelt, molten steel [P] can be down to 0.003%～0.008%, excellent effect from 0.08%.
Pan Gangdeng enterprise uses v-bearing titanomagnetite smelting, and molten iron is after desulfurization processes, and sulfur can be down to less than 0.005%, but
Phosphorus is but without effective treatment measures, and during converter smelting, dephosphorization treatment pressure is big.V element is contained, at steel making working procedure owing to climbing steel water
Needing molten iron is carried out vanadium extraction by converter blowing process, vanadium extraction by converter blowing is a kind of maturation process, and vanadium slag uses converter producing completely before.Vanadium extraction-
Steelmaking process has similarity with domestic and international used duplex converter dephosphorization process for making in equipment, technique, therefore, uses vanadium extraction
It is entirely possible in equipment, technology that converter carries out vanadium-bearing hot metal vanadium extraction and dephosphorization simultaneously.The enforcement of Dephosphorization vanadium extraction technology, can be
Steel making working procedure alleviates dephosphorization burden, changes significant to steelmaking process.At present, the calcium method process for extracting vanadium of steel independent research is climbed
Through maturation, being characterized in that vanadium slag CaO content is looser than the requirement of former wet method vanadium extraction, this carries out converter Dephosphorization for the present invention and carries
Vanadium research creates condition.
CN102796840A discloses " converter dephosphorization vanadium extraction coolant and production method, converter dephosphorization extraction vanadium method ",
The production method of described converter dephosphorization vanadium extraction coolant comprises the following steps: by sodium salt granule, iron scale granule, bauxite
Fine powder and water mixing, form compound；Through ball press, compound is pressed into bead；Baking bead, to remove moisture removal, obtains
Cooled agglomerated pellet finished product.The invention have the advantages that and can realize vanadium extraction and dephosphorization during vanadium extraction by converter blowing simultaneously；Operation letter
Single；Impact on existing process for extracting vanadium and half steel quality is less；Dephosphorization efficiency is high, can guarantee that the production efficiency of converter extracting vanadium.This
Outward, the part dephosphorization task of steelmaking converter can be moved forward to converter extracting vanadium by the present invention, it is achieved half steel low cost pneumatic steelmaking, just
In the molten steel obtaining composition, temperature is qualified.CN101215619 discloses the " method of vanadium extraction and dephosphorization and utilization from vanadium-bearing hot metal
The process for making of the method ", described from vanadium-bearing hot metal the method for vanadium extraction and dephosphorization include: vanadium-bearing hot metal is being carried out oxygen supply blowing
During, in described molten iron, adding vanadium extraction and dephosphorization agent and coolant, described vanadium extraction and dephosphorization agent is Na2CO3, obtain after blowing
Vanadium slag and low-phosphorous half steel.The method can extract dephosphorization while vanadium, thus can not only ensure effective extraction of vanadium, Er Qieneng
Phosphorus in enough effectively removal molten iron.From above-mentioned patent it can be seen that two kinds of methods are all with the compound of sodium as Dephosphorising agent, though this
So can play certain dephosphorization effect, but dephosphorization effect is inconspicuous, and sodium compound joins, and converter is interior invades furnace lining
Erosion is relatively big, affects life of converter.The present invention fully phases out the compound of sodium as Dephosphorising agent, it is to avoid the too fast erosion of furnace lining, with
Time can reduce TFe content in vanadium slag, the beneficially steel technology of dephosphorization vanadium extracting process.
Summary of the invention
The invention provides the production method of a kind of low-phosphorous half steel.The method can obtain the half steel that phosphorus content is relatively low, and
TFe content in production process gained vanadium slag, reduces production pressure for follow-up steel-making vanadium extraction and dephosphorization.
The production method of a kind of low-phosphorous half steel of the present invention, comprises the following steps:
After A, converter extracting vanadium have converted ferrum, fall oxygen rifle blows, and whole-process control oxygen flow is 1.5～3.0Nm3/
T.min, bottom blowing nitrogen intensity is 0.2～0.4Nm3/t.min；
B, blowing are initially added into steelmaking converter finishing slag, and before blowing, 2min presses control rifle position, more than benchmark rifle position 10～30mm；
Iron scale or other high oxides-containing iron is added after blowing 1～2min；Press benchmark rifle position after blowing 2min and control rifle position；Blowing
Before terminating, 2min presses control rifle position, more than benchmark rifle position 30～50mm；
Half steel and vanadium slag is gone out after C, finishing blowing；
Wherein, in step B, described steelmaking converter finishing slag addition is 5～10kg/tFe；Described iron scale or other height
Oxides-containing iron addition is 15～25kg/tFe.
Preferably, in production method step C of above-mentioned low-phosphorous half steel, described in add Calx 1～2kg/t steel when going out half steel,
Iron scale 1～1.5kg/t steel, steelmaking converter finishing slag 0.5～1.0kg/t steel carries out mixed rushing dephosphorization.
Preferably, in production method step C of above-mentioned low-phosphorous half steel, described in go out half steel to when 1/4 add Calx, ferrum oxide
Skin, steelmaking converter finishing slag.
Concrete, in production method step B of above-mentioned low-phosphorous half steel, described steelmaking converter finishing slag is that pneumatic steelmaking terminates
The slag of rear generation, is mainly composed of CaO 25～45%, SiO212～16%, MgO 8～12%, TFe 18～22%.
Preferably, in production method step B of above-mentioned low-phosphorous half steel, other high oxides-containing iron described is grade ＞ 55%
Any one in iron mine, pellet or sintering deposit.
Preferably, in production method step B of above-mentioned low-phosphorous half steel, blowing total time is 5～7min.
Preferably, in production method step C of above-mentioned low-phosphorous half steel, after described finishing blowing half steel temperature be 1380～
1400℃。
The pass key control operation of the present invention is: starting just to add steelmaking converter vanadium extraction finishing slag in blowing can preferably be formed
Dephosphorized slag；Coordinating three sections of blowing modes, first paragraph adds steelmaking converter finishing slag and realizes main dephosphorization simultaneously；Second stage adds oxygen
Change iron sheet, strengthen bottom blowing stirring simultaneously, oxygen lance position is lower, realize molten bath strong mixing, is more beneficial for dephosphorization and vanadium extraction；3rd rank
Duan Jixu vanadium extraction and dephosphorization.Follow-up go out half steel time feed further dephosphorization.The inventive method is provided with suitable technique and parameter, both
Can realize the extraction of vanadium, also can realize the partial removal of phosphorus, after can alleviating, operation carries out converter ultra-low phosphoretic steel smelting process
Pressure.
Present invention utilizes vanadium extraction steel mill converter extracting vanadium and become the feature of duplex with steelmaking converter, in converter extracting vanadium simultaneously
Carry out the operation of dephosphorization and vanadium extraction, to alleviate dephosphorization task during steelmaking converter smelting molten steel, few for low phosphorus steel by smelting and realization
Slag steel-making creates conditions.The inventive method have selected suitable Dephosphorising agent, have adjusted process conditions, it is achieved that dephosphorization and vanadium extraction are double
Weight purpose, can obtain phosphorus content half steel below 0.02%, can produce the phosphorus content molten steel less than 0.006%；Drop simultaneously
TFe content in low vanadium slag.The unsaturated slag of phosphate capacity abundant dephosphorization in stove can be recycled, to reducing iron and steel stock simultaneously
Consume and serve good effect.
Detailed description of the invention
In the inventive method, described benchmark rifle position refers to that oxygen gun sprayer is away from molten iron level 10mm.
In the inventive method, not making specified otherwise, ratio, content etc. all represent percentage by weight.
In order to be more fully understood that the present invention, further illustrate the present invention below in conjunction with embodiment.
Embodiment 1
After 200t converter extracting vanadium has converted ferrum, molten iron thermometric is 1305 DEG C, and thermometric completes to drop oxygen rifle afterwards and blows, omnidistance
Oxygen flux control is at 1.5Nm3/ t.min, bottom blowing nitrogen intensity presses 0.3Nm3/ t.min controls；Add steel-making when blowing starts to turn
Stove vanadium extraction finishing slag 10kg/tFe slag making；Before blowing, the above 30mm in benchmark rifle position control is pressed in 2min rifle position；Oxygen is added after blowing 2min
Changing iron sheet, the amount of iron scale is controlled by 25kg/tFe, simultaneously by rifle potential drop to benchmark rifle position；2min oxygen before finishing blowing
Rifle rifle position controls to the above 40mm in benchmark rifle position；Half steel and vanadium slag is gone out after finishing blowing.
In molten iron, content of vanadium is 0.330%, and phosphorus content is 0.070%, and after finishing blowing, in half steel, content of vanadium is
0.043%, phosphorus content is 0.021%, half steel temperature 1380 DEG C, vanadium slag TFe 15.32%.
Tapping is carried out to addition Calx 2kg/t steel, iron scale 1.5kg/t steel, steelmaking converter finishing slag 1kg/t steel when 1/4
Mixing and rush dephosphorization, de-rear phosphorus content is 0.014%.
Embodiment 2
After 120t converter extracting vanadium has converted ferrum, molten iron thermometric is 1280 DEG C, and thermometric completes to drop oxygen rifle afterwards and blows, omnidistance
Oxygen flux control is at 3.0Nm3/ t.min, bottom blowing nitrogen intensity presses 0.2Nm3/ t.min controls；Add steel-making when starting to blow to turn
Stove vanadium extraction finishing slag 5kg/tFe carries out slag making, and before blowing, the above 20mm in benchmark rifle position control is pressed in 2min rifle position；Add after blowing 2min
Iron scale, the amount of iron scale is controlled by 20kg/tFe, is controlled by benchmark rifle position simultaneously；2min before finishing blowing
Control of lance position is to the above 50mm in benchmark rifle position；Half steel and vanadium slag is gone out after finishing blowing.
In molten iron, content of vanadium is 0.302%, and phosphorus content is 0.081%, and after finishing blowing, half steel content of vanadium is 0.032%,
Phosphorus content is 0.027%, half steel temperature 1395 DEG C, vanadium slag TFe 14.51%.
Tapping mixes to addition Calx 1kg/t steel, iron scale 1kg/t steel, steelmaking converter finishing slag 1kg/t steel when 1/4
Rushing dephosphorization, de-rear phosphorus content is 0.019%.
Embodiment 3
After 200t converter extracting vanadium has converted ferrum, molten iron thermometric is 1250 DEG C, and thermometric completes to drop oxygen rifle afterwards and blows, omnidistance
Oxygen flux control is at 2Nm3/ t.min, bottom blowing nitrogen intensity presses 0.4Nm3/ t.min controls；Steelmaking converter is added when starting to blow
Vanadium extraction finishing slag 8kg/tFe, before blowing, 2min rifle position is controlled by the above 10mm in benchmark rifle position；Oxidation is added after blowing 1.5min
Iron sheet, the amount of iron scale is controlled by 15kg/tFe；It is controlled by benchmark rifle position after blowing 2min；Before finishing blowing
2min control of lance position is to the above 30mm in benchmark rifle position；Half steel and vanadium slag is gone out after finishing blowing.
In molten iron, content of vanadium is 0.386%, and phosphorus content is 0.061%, and after finishing blowing, half steel content of vanadium is 0.046%,
Phosphorus content is 0.030%, half steel temperature 1352 DEG C, vanadium slag TFe 14.17%.
Tapping is entered to addition Calx 1.5kg/t steel, iron scale 1.2kg/t steel, steelmaking converter finishing slag 1kg/t steel when 1/4
Row is mixed rushes dephosphorization, and de-rear phosphorus content is 0.021%.
Claims (7)
1. the production method of a low-phosphorous half steel, it is characterised in that: comprise the following steps:
After A, converter extracting vanadium have converted ferrum, fall oxygen rifle blows, and whole-process control oxygen flow is 1.5～3.0Nm3/ t.min, bottom blowing
Nitrogen intensity is 0.2～0.4Nm3/t.min；
B, blowing are initially added into steelmaking converter finishing slag, and before blowing, 2min presses control rifle position, more than benchmark rifle position 10～30mm；Blowing 1
～after 2min, add iron scale or other high oxides-containing iron；Press benchmark rifle position after blowing 2min and control rifle position；Finishing blowing
Front 2min presses more than benchmark rifle position 30～50mm and controls rifle position；
Half steel and vanadium slag is gone out after C, finishing blowing；
Wherein, in step B, described steelmaking converter finishing slag addition is 5～10kg/tFe；Described iron scale or other high iron content
Oxide addition is 15～25kg/tFe.
The production method of low-phosphorous half steel the most according to claim 1, it is characterised in that: in step C, described in add when going out half steel
Entering Calx 1～2kg/t steel, iron scale 1～1.5kg/t steel, steelmaking converter finishing slag 0.5～1.0kg/t steel carries out mixed rushing dephosphorization.
The production method of low-phosphorous half steel the most according to claim 1, it is characterised in that: in step C, described in go out half steel to 1/
Calx, iron scale, steelmaking converter finishing slag is added when 4.
4. according to the production method of the low-phosphorous half steel described in any one of claims 1 to 3, it is characterised in that: in step B, described
Steelmaking converter finishing slag be the slag produced after pneumatic steelmaking terminates, be mainly composed of CaO 25～45%, SiO212～
16%, MgO 8～12%, TFe 18～22%.
The production method of low-phosphorous half steel the most according to claim 1, it is characterised in that: in step B, other high iron content described
Oxide is any one in grade ＞ 55% iron mine, pellet or sintering deposit.
The production method of low-phosphorous half steel the most according to claim 1, it is characterised in that: in step B, blowing total time is 5
～7min.
The production method of low-phosphorous half steel the most according to claim 1, it is characterised in that: in step C, after described finishing blowing
Half steel temperature is 1380～1400 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610807151.7A CN106282478B (en) | 2016-09-07 | 2016-09-07 | A kind of production method of low-phosphorous half steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610807151.7A CN106282478B (en) | 2016-09-07 | 2016-09-07 | A kind of production method of low-phosphorous half steel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106282478A true CN106282478A (en) | 2017-01-04 |
| CN106282478B CN106282478B (en) | 2018-09-04 |
Family
ID=57709726
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610807151.7A Active CN106282478B (en) | 2016-09-07 | 2016-09-07 | A kind of production method of low-phosphorous half steel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106282478B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1524969A (en) * | 2003-02-28 | 2004-09-01 | 宝山钢铁股份有限公司 | Melted iron dephosphorization agent using vessel slag as raw material |
| CN103194565A (en) * | 2013-04-28 | 2013-07-10 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for synchronously dephosphorization and vanadium extraction of vanadium-containing molten iron |
| CN104774994A (en) * | 2015-03-31 | 2015-07-15 | 河北钢铁股份有限公司承德分公司 | Vanadium pentoxide extraction and synchronous dephosphorization method for vanadium-containing molten iron |
| CN105349728A (en) * | 2015-11-26 | 2016-02-24 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for simultaneously conducting dephosphorization and vanadium extraction on vanadium-contained molten iron through converter |
-
2016
- 2016-09-07 CN CN201610807151.7A patent/CN106282478B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1524969A (en) * | 2003-02-28 | 2004-09-01 | 宝山钢铁股份有限公司 | Melted iron dephosphorization agent using vessel slag as raw material |
| CN103194565A (en) * | 2013-04-28 | 2013-07-10 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for synchronously dephosphorization and vanadium extraction of vanadium-containing molten iron |
| CN104774994A (en) * | 2015-03-31 | 2015-07-15 | 河北钢铁股份有限公司承德分公司 | Vanadium pentoxide extraction and synchronous dephosphorization method for vanadium-containing molten iron |
| CN105349728A (en) * | 2015-11-26 | 2016-02-24 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for simultaneously conducting dephosphorization and vanadium extraction on vanadium-contained molten iron through converter |
Non-Patent Citations (1)
| Title |
|---|
| 冯捷等: "《转炉炼钢生产》", 31 May 2006, 冶金工业出版社 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106282478B (en) | 2018-09-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103194565B (en) | Method for synchronously dephosphorization and vanadium extraction of vanadium-containing molten iron | |
| CN105349728B (en) | A kind of method of vanadium-bearing hot metal converter Dephosphorization vanadium extraction | |
| CN100451134C (en) | Double-slag converter process for producing high carbon low-phosphorus molten steel | |
| CN102329921B (en) | Semi-steel making method | |
| CN102212643B (en) | Converter less-slag smelting process | |
| CN103060512B (en) | Dephosphorizing and steelmaking method of medium-high-phosphorous semisteel by top-blown converter | |
| CN108148942B (en) | A kind of converter slag stays slag gasification dephosphorization method and recycles smelting process | |
| CN105525055B (en) | A kind of control method of converter less-slag melting carbon period splash | |
| CN103773919B (en) | Method for smelting middle-high phosphorus molten iron in converter | |
| CN100453657C (en) | Mono-slag converter process for producing high carbon low-phosphorus molten steel | |
| CN102660658A (en) | Method for curing converter slag | |
| CN105112595A (en) | Smelting method capable of realizing phosphorus content of less than 70ppm in high-carbon converter tapping | |
| CN103789483B (en) | Method for smelting low-phosphorus steel by using semi-steel | |
| CN103290163B (en) | Semisteel steelmaking method | |
| CN103205536B (en) | semi-steel dephosphorizing agent and semi-steel dephosphorizing method | |
| CN104004882A (en) | Method of semisteel silicon increasing processing and method of semisteel converter steelmaking | |
| CN104060020B (en) | A kind of dephosphorization method for making steel improving converter terminal molten steel Fe content | |
| CN104531940A (en) | Converter final slag thickening method | |
| CN106244898B (en) | A kind of production method of Low-phosphorus Steel | |
| CN104109727A (en) | Method for smelting low-phosphorous steel by using semisteel through converter | |
| CN106244763A (en) | A kind of vanadium-bearing hot metal is the method for Simultaneous Oxidation separation of phosphorus vanadium in converter | |
| CN104263875A (en) | Dephosphorizing method for producing alloy weld line steel from high-phosphorus molten iron by top-blown converter | |
| CN106222357A (en) | A kind of method of the low-phosphorous half steel of vanadium-bearing hot metal converter producing | |
| CN103966388A (en) | Semi-steel converter steelmaking method with shortened pure oxygen blowing time | |
| CN103773918B (en) | A kind ofly reduce the method that sulphur is returned in semi-steel making converter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20180720 Address after: 610306 Chengdu City, Chengdu, Sichuan, China (Sichuan) free trade test zone, Chengdu City, Qingbaijiang District, xiangdao Boulevard, Chengxiang Town, No. 1509 (room 13, A District, railway port mansion), room 1319 Applicant after: CHENGDU ADVANCED METAL MATERIAL INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE Co.,Ltd. Address before: 617000 Taoyuan street, East District, Panzhihua, Sichuan Province, No. 90 Applicant before: PANGANG GROUP PANZHIHUA IRON & STEEL RESEARCH INSTITUTE Co.,Ltd. |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 610306 Chengdu City, Chengdu, Sichuan, China (Sichuan) free trade test zone, Chengdu City, Qingbaijiang District, xiangdao Boulevard, Chengxiang Town, No. 1509 (room 13, A District, railway port mansion), room 1319 Patentee after: Chengdu advanced metal material industry technology Research Institute Co.,Ltd. Address before: 610306 Chengdu City, Chengdu, Sichuan, China (Sichuan) free trade test zone, Chengdu City, Qingbaijiang District, xiangdao Boulevard, Chengxiang Town, No. 1509 (room 13, A District, railway port mansion), room 1319 Patentee before: CHENGDU ADVANCED METAL MATERIAL INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE Co.,Ltd. |
|
| EE01 | Entry into force of recordation of patent licensing contract | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20170104 Assignee: XICHANG STEEL VANADIUM CO.,LTD., PANGANG Group Assignor: Chengdu advanced metal material industry technology Research Institute Co.,Ltd. Contract record no.: X2024980001866 Denomination of invention: A production method of low phosphorus semi steel Granted publication date: 20180904 License type: Common License Record date: 20240204 |