CN106282478B - 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
- CN106282478B CN106282478B CN201610807151.7A CN201610807151A CN106282478B CN 106282478 B CN106282478 B CN 106282478B CN 201610807151 A CN201610807151 A CN 201610807151A CN 106282478 B CN106282478 B CN 106282478B
- Authority
- CN
- China
- Prior art keywords
- blowing
- half steel
- 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.)
- Active
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 28
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 100
- 229910052720 vanadium Inorganic materials 0.000 claims abstract description 66
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 claims abstract description 66
- 238000007664 blowing Methods 0.000 claims abstract description 55
- 229910052742 iron Inorganic materials 0.000 claims abstract description 50
- 239000002893 slag Substances 0.000 claims abstract description 39
- 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
- 235000000396 iron Nutrition 0.000 claims abstract description 4
- 238000004886 process control Methods 0.000 claims abstract description 3
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 7
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 7
- 239000004571 lime Substances 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 4
- 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
- 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
- 238000005516 engineering process Methods 0.000 abstract description 5
- 229910052751 metal Inorganic materials 0.000 abstract description 5
- 239000002184 metal Substances 0.000 abstract description 5
- 238000007796 conventional method Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 29
- 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
- 239000002826 coolant Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000004907 flux Effects 0.000 description 3
- 238000010079 rubber tapping Methods 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
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 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
- 230000008859 change Effects 0.000 description 2
- 230000009194 climbing Effects 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000035800 maturation Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- 239000005864 Sulphur Substances 0.000 description 1
- 229910001570 bauxite Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 239000004615 ingredient 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
- 238000012797 qualification 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
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 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
Abstract
The invention belongs to field of iron and steel smelting, and in particular to a kind of production method of low-phosphorous half steel.It is an object of the invention to solve the problems, such as that conventional method vanadium extraction from hot metal dephosphorization rate is relatively low, and TFe contents in vanadium slag are reduced, to reduce steel technology and provide low-phosphorous half steel for steelmaking converter.A kind of production method of low-phosphorous half steel of the present invention, includes the following steps：A, after converter extracting vanadium has converted iron, drop oxygen rifle blows, and whole-process control oxygen flow is 1.5~3.0Nm3/ t.min, bottom blowing nitrogen intensity are 0.2~0.4Nm3/t.min；B, blowing is initially added into steelmaking converter finishing slag, and 2min controls rifle position by more than benchmark rifle position 10~30mm before blowing；Iron scale or other high oxides-containing irons is added after 1~2min of blowing；It is controlled by benchmark rifle position after blowing 2min；2min controls rifle position by more than benchmark rifle position 30~50mm before finishing blowing；C, go out half steel and vanadium slag after finishing blowing.
Description
Technical field
The invention belongs to field of iron and steel smelting, and in particular to a kind of production method of low-phosphorous half steel.
Background technology
Phosphorus is the harmful element in most steel grades.In recent years, with the rapid development of science and technology, cryogenic steel,
Marine steel, anti-hydrogen induced cracking steel and part slab steel, should have extremely low sulfur content, also require phosphorus content ＜ in steel
0.01% or 0.005%.1980, since the age, for the pre- dephosphorization problem of molten iron, various processing methods is developed, have most been represented
There are two types of property：One is dephosphorization is carried out in the ladle or fish torpedo ladle for containing molten iron, another kind is that molten iron is carried out in converter
Dephosphorizing pretreatment, both methods have obtained commercial Application.Ladle or fish torpedo ladle dephosphorization mainly have that temperature drop is larger, oxygen blast is mended
Especially severe, molten iron processing time are grown the problems such as influencing production direct motion again for splash when repaying temperature drop, and applicable cases are undesirable.And converter
Pre- dephosphorization realizes industrial-scale production in the iron and steel enterprise of Japan and South Korea, and Chinese Baosteel, Wuhan Iron and Steel Plant etc. are in production Low-phosphorus Steel
When, it is smelted using the duplex dephosphorized technique of twin furnace, molten steel [P] can be down to 0.003%~0.008% from 0.08%, excellent effect.
Pan Gangdeng enterprises use v-bearing titanomagnetite smelting, molten iron after desulfurization process, sulphur can be down to 0.005% hereinafter, but
Phosphorus is but without the measure that is effectively treated, and dephosphorization treatment pressure is big when converter smelting.Contain v element due to climbing steel water, in steel making working procedure
It needs to carry out vanadium extraction by converter blowing processing to molten iron before, vanadium extraction by converter blowing is a kind of maturation process, and vanadium slag uses converter producing completely.Vanadium extraction-
Steelmaking process has similitude in equipment, technique with domestic and international used duplex converter dephosphorization process for making, therefore, using vanadium extraction
Converter carries out vanadium-bearing hot metal, and vanadium extraction and dephosphorization is entirely possible in equipment, technology simultaneously.The implementation of Dephosphorization vanadium extraction technology can be
Steel making working procedure mitigates dephosphorization burden, is changed to steelmaking process significant.Currently, climbing the calcium method process for extracting vanadium of steel independent research
Through maturation, its main feature is 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 the converter dephosphorization vanadium extraction coolant includes the following steps：By sodium salt particle, iron scale particle, bauxite
Fine powder and water mixing, form mixture；Mixture is pressed into bead by ball press；Bead is toasted to remove moisture removal, is obtained
Cooled agglomerated pellet finished product.Advantages of the present invention includes：Vanadium extraction and dephosphorization can be realized during vanadium extraction by converter blowing simultaneously；Operation letter
It is single；Influence to existing process for extracting vanadium and half steel quality is smaller；Dephosphorization is efficient, can guarantee the production efficiency of converter extracting vanadium.This
Outside, the part dephosphorization task of steelmaking converter can be moved forward to converter extracting vanadium by the present invention, realize half steel low cost pneumatic steelmaking, just
In obtaining the molten steel of ingredient, temperature qualification.CN101215619 discloses the " method of vanadium extraction and dephosphorization and utilization from vanadium-bearing hot metal
The method of the process for making of this method ", the vanadium extraction and dephosphorization from vanadium-bearing hot metal includes：Oxygen supply blowing is being carried out to vanadium-bearing hot metal
During, vanadium extraction and dephosphorization agent and coolant are added into the molten iron, the vanadium extraction and dephosphorization agent is Na2CO3, obtained after blowing
Vanadium slag and low-phosphorous half steel.This method can while extracting vanadium dephosphorization, to not only can guarantee effective extraction of vanadium, Er Qieneng
Enough effectively remove the phosphorus in molten iron.Two methods are can be seen that from above-mentioned patent and are using the compound of sodium as Dephosphorising agent, though this
It can so play certain dephosphorization effect, but dephosphorization effect unobvious, and sodium compound is added in converter and invades furnace lining
It loses larger, influences life of converter.The present invention fully phases out the compound of sodium as Dephosphorising agent, avoids the too fast erosion of furnace lining, together
When can reduce TFe contents in vanadium slag, be conducive to the steel technology of dephosphorization vanadium extracting process.
Invention content
The present invention provides a kind of production methods of low-phosphorous half steel.This method can obtain the lower half steel of phosphorus content, and
TFe contents in vanadium slag obtained by production process reduce production pressure for follow-up steel-making vanadium extraction and dephosphorization.
A kind of production method of low-phosphorous half steel of the present invention, includes the following steps：
A, after converter extracting vanadium has converted iron, drop oxygen rifle blows, and whole-process control oxygen flow is 1.5~3.0Nm3/
T.min, bottom blowing nitrogen intensity are 0.2~0.4Nm3/t.min；
B, blowing is initially added into steelmaking converter finishing slag, and 2min controls rifle position by more than benchmark rifle position 10~30mm before blowing；
Iron scale or other high oxides-containing irons is added after 1~2min of blowing；After blowing 2min rifle position is controlled by benchmark rifle position；Blowing
2min controls rifle position by more than benchmark rifle position 30~50mm before terminating；
C, go out half steel and vanadium slag after finishing blowing；
Wherein, in step B, the steelmaking converter finishing slag addition is 5~10kg/tFe；The iron scale is other high
Oxides-containing iron addition is 15~25kg/tFe.
Preferably, in the production method step C of above-mentioned low-phosphorous half steel, it is described go out half steel when be added lime 1~2kg/t steel,
Iron scale 1~1.5kg/t steel, steelmaking converter 0.5~1.0kg/t of finishing slag steel, which mix, rushes dephosphorization.
Preferably, in the production method step C of above-mentioned low-phosphorous half steel, it is described go out half steel to when 1/4 be added lime, iron oxide
Skin, steelmaking converter finishing slag.
Specifically, in the production method step B of above-mentioned low-phosphorous half steel, the steelmaking converter finishing slag terminates for pneumatic steelmaking
The clinker generated afterwards, main component are CaO 25~45%, SiO212~16%, MgO 8~12%, TFe 18~22%.
Preferably, in the production method step B of above-mentioned low-phosphorous half steel, other high oxides-containing irons are grade ＞ 55%
Any one in iron ore, pellet or sinter.
Preferably, in the production method step B of above-mentioned low-phosphorous half steel, blowing total time is 5~7min.
Preferably, in the production method step C of above-mentioned low-phosphorous half steel, after the finishing blowing half steel temperature be 1380~
1400℃。
The crucial control of the present invention, which operates, is：Start just addition steelmaking converter vanadium extraction finishing slag in blowing can preferably be formed
Dephosphorized slag；Three sections of blowing modes of cooperation simultaneously, first segment are added steelmaking converter finishing slag and realize main dephosphorization；Oxygen is added in second stage
Change iron sheet and meanwhile enhance bottom blowing stirring, oxygen lance position it is lower, realize molten bath strong mixing, be more advantageous to dephosphorization and vanadium extraction；Third rank
Duan Jixu vanadium extraction and dephosphorizations.Further feed dephosphorization when subsequently going out half steel.The method of the present invention is provided with suitable technique and parameter, both
The extraction of vanadium may be implemented, can also realize the partial removal of phosphorus, process carries out converter ultra-low phosphoretic steel smelting process after can alleviating
Pressure.
The characteristics of present invention utilizes vanadium extraction steel mill converter extracting vanadiums and steelmaking converter into duplex, in converter extracting vanadium simultaneously
The operation for carrying out dephosphorization and vanadium extraction is that low phosphorus steel by smelting and realization are few to mitigate dephosphorization task when steelmaking converter smelting molten steel
Slag steel-making creates conditions.The method of the present invention has selected suitable Dephosphorising agent, has adjusted process conditions, realizes dephosphorization and vanadium extraction is double
Weight purpose can obtain phosphorus content in 0.02% half steel below, can produce the molten steel that phosphorus content is less than 0.006%；It drops simultaneously
TFe contents in low vanadium slag.The unsaturated clinker of phosphate capacity abundant dephosphorization in stove can be recycled simultaneously, to reducing iron and steel stock
Consumption plays the role of good.
Specific implementation mode
In the method for the present invention, the benchmark rifle position refer to oxygen lance nozzle from molten iron level 10mm at.
In the method for the present invention, without specific instruction, ratio, content etc. indicate weight percent.
For a better understanding of the present invention, it is further illustrated the present invention with reference to embodiment.
Embodiment 1
After 200t converter extracting vanadiums have converted iron, molten iron thermometric is 1305 DEG C, and drop oxygen rifle blows after thermometric is completed, whole
Oxygen flux control is in 1.5Nm3/ t.min, bottom blowing nitrogen intensity press 0.3Nm3/ t.min is controlled；Steel-making is added when blowing starts to turn
Stove vanadium extraction finishing slag 10kg/tFe slag making；2min rifle positions are by the above 30mm controls of benchmark rifle position before blowing；Oxygen is added after blowing 2min
Change iron sheet, the amount of iron scale is controlled by 25kg/tFe, while rifle position is dropped to benchmark rifle position；2min oxygen before finishing blowing
Rifle rifle position is controlled to the above 40mm of benchmark rifle position；Go out half steel and vanadium slag after finishing blowing.
Content of vanadium is 0.330% in molten iron, phosphorus content 0.070%, and after finishing blowing, content of vanadium is in half steel
0.043%, phosphorus content 0.021%, 1380 DEG C of half steel temperature, vanadium slag TFe 15.32%.
Tapping is carried out to lime 2kg/t steel, iron scale 1.5kg/t steel, steelmaking converter finishing slag 1kg/t steel are added when 1/4
Mixed to rush dephosphorization, phosphorus content is 0.014% after taking off.
Embodiment 2
After 120t converter extracting vanadiums have converted iron, molten iron thermometric is 1280 DEG C, and drop oxygen rifle blows after thermometric is completed, whole
Oxygen flux control is in 3.0Nm3/ t.min, bottom blowing nitrogen intensity press 0.2Nm3/ t.min is controlled；Start that steel-making turn is added when blowing
Stove vanadium extraction finishing slag 5kg/tFe carries out slag making, and 2min rifle positions are by the above 20mm controls of benchmark rifle position before blowing；It is added after blowing 2min
The amount of iron scale, iron scale is controlled by 20kg/tFe, while being controlled by benchmark rifle position；2min before finishing blowing
Control of lance position is to the above 50mm of benchmark rifle position；Go out half steel and vanadium slag after finishing blowing.
Content of vanadium is 0.302% in molten iron, phosphorus content 0.081%, and after finishing blowing, half steel content of vanadium is 0.032%,
Phosphorus content is 0.027%, 1395 DEG C of half steel temperature, vanadium slag TFe 14.51%.
Tapping to addition lime 1kg/t steel, iron scale 1kg/t steel, steelmaking converter finishing slag 1kg/t steel when 1/4 is mixed
Dephosphorization is rushed, phosphorus content is 0.019% after taking off.
Embodiment 3
After 200t converter extracting vanadiums have converted iron, molten iron thermometric is 1250 DEG C, and drop oxygen rifle blows after thermometric is completed, whole
Oxygen flux control is in 2Nm3/ t.min, bottom blowing nitrogen intensity press 0.4Nm3/ t.min is controlled；Start that steelmaking converter is added when blowing
Vanadium extraction finishing slag 8kg/tFe, 2min rifle positions are controlled by the above 10mm of benchmark rifle position before blowing；Oxidation is added after blowing 1.5min
The amount of iron sheet, 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 of benchmark rifle position；Go out half steel and vanadium slag after finishing blowing.
Content of vanadium is 0.386% in molten iron, phosphorus content 0.061%, and after finishing blowing, half steel content of vanadium is 0.046%,
Phosphorus content is 0.030%, 1352 DEG C of half steel temperature, vanadium slag TFe 14.17%.
Tapping to be added when 1/4 lime 1.5kg/t steel, iron scale 1.2kg/t steel, steelmaking converter finishing slag 1kg/t steel into
Row is mixed to rush dephosphorization, and phosphorus content is 0.021% after taking off.
Claims (7)
1. a kind of production method of low-phosphorous half steel, it is characterised in that：Include the following steps：
A, after converter extracting vanadium has converted iron, drop 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 is initially added into steelmaking converter finishing slag, and 2min controls rifle position by more than benchmark rifle position 10~30mm before blowing；Blowing 1
Iron scale or other high oxides-containing irons are added after~2min；After blowing 2min rifle position is controlled by benchmark rifle position；Finishing blowing
Preceding 2min controls rifle position by more than benchmark rifle position 30~50mm；
C, go out half steel and vanadium slag after finishing blowing；
Wherein, in step B, the steelmaking converter finishing slag addition is 5~10kg/tFe；The iron scale or other high iron content
Oxide addition is 15~25kg/tFe.
2. the production method of low-phosphorous half steel according to claim 1, it is characterised in that：In step C, it is described go out half steel when add
Enter lime 1~2kg/t steel, iron scale 1~1.5kg/t steel, steelmaking converter 0.5~1.0kg/t of finishing slag steel, which mix, rushes dephosphorization.
3. the production method of low-phosphorous half steel according to claim 1, it is characterised in that：In step C, it is described go out half steel to 1/
Lime, iron scale, steelmaking converter finishing slag are added when 4.
4. according to the production method of the low-phosphorous half steel of claims 1 to 3 any one of them, it is characterised in that：It is described in step B
Steelmaking converter finishing slag be the clinker that generates after pneumatic steelmaking, main component is CaO 25~45%, SiO212~
16%, MgO 8~12%, TFe 18~22%.
5. the production method of low-phosphorous half steel according to claim 1, it is characterised in that：In step B, other high iron content
Oxide is any one in 55% iron ores of grade ＞, pellet or sinter.
6. the production method of low-phosphorous half steel according to claim 1, it is characterised in that：In step B, blowing total time is 5
~7min.
7. the production method of low-phosphorous half steel according to claim 1, it is characterised in that：In step C, after the 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 CN106282478A (en) | 2017-01-04 |
| CN106282478B true 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) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1229506C (en) * | 2003-02-28 | 2005-11-30 | 宝山钢铁股份有限公司 | Melted iron dephosphorization agent using vessel slag as raw material |
| CN103194565B (en) * | 2013-04-28 | 2014-12-31 | 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 |
| CN104774994B (en) * | 2015-03-31 | 2017-09-15 | 河北钢铁股份有限公司承德分公司 | A kind of method that vanadium-bearing hot metal extracts the synchronous dephosphorization of vanadic anhydride |
| CN105349728B (en) * | 2015-11-26 | 2017-12-12 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of method of vanadium-bearing hot metal converter Dephosphorization vanadium extraction |
-
2016
- 2016-09-07 CN CN201610807151.7A patent/CN106282478B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN106282478A (en) | 2017-01-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| RU2571969C2 (en) | Method of simultaneous dephosphorisation and extraction of vanadium from vanadium-bearing melted cast 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 | |
| CN102212643B (en) | Converter less-slag smelting process | |
| CN104250672B (en) | A kind of method of combined blown converter high efficiency dephosphorating | |
| CN108085602B (en) | A kind of rolling processing method of abrasion-proof steel ball steel and the steel ball | |
| CN103789483B (en) | Method for smelting low-phosphorus steel by using semi-steel | |
| CN105525055A (en) | Method for controlling splashing in less slag smelting decarbonization period of converter | |
| CN102329921A (en) | Semi-steel making method | |
| CN103074545B (en) | High-strength low temperature hot rolling resistant channel steel for forklift gantry and preparation method for channel steel | |
| CN105506226B (en) | A kind of method that hot metal desiliconization, pre- decarburization and pre- dephosphorization are carried out in hot-metal bottle | |
| CN103205536B (en) | semi-steel dephosphorizing agent and semi-steel dephosphorizing method | |
| CN110117689A (en) | A method of based on high-silicon molten iron converter double slag process low phosphorus steel by smelting | |
| CN106676233A (en) | Pre-fused compound dephosphorizer, preparation method of pre-fused compound dephosphorizer and method for smelting ultralow phosphorous steel | |
| CN106148631A (en) | A kind of method of converter smelting low-sulfur ultralow nitrogen molten steel | |
| CN104060020B (en) | A kind of dephosphorization method for making steel improving converter terminal molten steel Fe content | |
| CN107365886B (en) | A kind of method of converter high temperature dephosphorization | |
| CN104531940A (en) | Converter final slag thickening method | |
| CN106244763B (en) | A kind of method of vanadium-bearing hot metal Simultaneous Oxidation separation of phosphorus vanadium in converter | |
| CN106244898B (en) | A kind of production method of Low-phosphorus Steel | |
| CN106222357B (en) | A kind of method of the low-phosphorous half steel of vanadium-bearing hot metal converter producing | |
| CN105296703B (en) | Top and bottom combined blown converter phosphor-containing steel smelting process | |
| CN103205522B (en) | Method for smelting plain carbon steel from semi-steel | |
| CN106244760B (en) | A kind of method of vanadium-bearing hot metal dephosphorization in converter extracting vanadium | |
| CN104109727A (en) | Method for smelting low-phosphorous steel by using semisteel through 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 |
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. |
|
| TA01 | Transfer of patent application right | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| 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. |
|
| CP01 | Change in the name or title of a patent holder | ||
| 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 |
|
| EE01 | Entry into force of recordation of patent licensing contract |