CN103981335B - A kind of vanadium-bearing hot metal vanadium extraction and dephosphorization agent - Google Patents
A kind of vanadium-bearing hot metal vanadium extraction and dephosphorization agent Download PDFInfo
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- CN103981335B CN103981335B CN201410238892.9A CN201410238892A CN103981335B CN 103981335 B CN103981335 B CN 103981335B CN 201410238892 A CN201410238892 A CN 201410238892A CN 103981335 B CN103981335 B CN 103981335B
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- 229910052720 vanadium Inorganic materials 0.000 title claims abstract description 169
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical group [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 title claims abstract description 168
- 238000000605 extraction Methods 0.000 title claims abstract description 121
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 28
- 239000002184 metal Substances 0.000 title claims abstract description 28
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 136
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims abstract description 34
- 239000002253 acid Substances 0.000 claims abstract description 32
- 239000000203 mixture Substances 0.000 claims abstract description 31
- 229910052742 iron Inorganic materials 0.000 claims abstract description 18
- 239000000126 substance Substances 0.000 claims abstract description 14
- 229910004298 SiO 2 Inorganic materials 0.000 claims abstract description 10
- 239000002994 raw material Substances 0.000 claims description 47
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 43
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 28
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 18
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 18
- 239000004571 lime Substances 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 16
- 239000000395 magnesium oxide Substances 0.000 claims description 14
- 239000000843 powder Substances 0.000 claims description 11
- 238000005245 sintering Methods 0.000 claims description 9
- 239000004927 clay Substances 0.000 claims description 4
- 229910000514 dolomite Inorganic materials 0.000 claims description 3
- 239000010459 dolomite Substances 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 239000008188 pellet Substances 0.000 claims description 3
- 239000010453 quartz Substances 0.000 claims description 3
- 239000011044 quartzite Substances 0.000 claims description 3
- 239000004576 sand Substances 0.000 claims description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 210000003462 vein Anatomy 0.000 claims description 3
- 239000002893 slag Substances 0.000 abstract description 18
- 229910000831 Steel Inorganic materials 0.000 abstract description 9
- 239000010959 steel Substances 0.000 abstract description 9
- 238000009628 steelmaking Methods 0.000 abstract description 7
- 239000000292 calcium oxide Substances 0.000 description 17
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 17
- 238000002360 preparation method Methods 0.000 description 14
- 230000000694 effects Effects 0.000 description 10
- 239000000463 material Substances 0.000 description 7
- 238000007664 blowing Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- WETINTNJFLGREW-UHFFFAOYSA-N calcium;iron;tetrahydrate Chemical compound O.O.O.O.[Ca].[Fe].[Fe] WETINTNJFLGREW-UHFFFAOYSA-N 0.000 description 4
- 239000011574 phosphorus Substances 0.000 description 4
- 229910052698 phosphorus Inorganic materials 0.000 description 4
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000006698 induction Effects 0.000 description 3
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 3
- 238000002386 leaching Methods 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 230000001590 oxidative effect Effects 0.000 description 3
- 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
- 238000003723 Smelting Methods 0.000 description 2
- GJPIVNTZJFSDCX-UHFFFAOYSA-N [V].[Ca] Chemical compound [V].[Ca] GJPIVNTZJFSDCX-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 241001062472 Stokellia anisodon Species 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- XHCLAFWTIXFWPH-UHFFFAOYSA-N [O-2].[O-2].[O-2].[O-2].[O-2].[V+5].[V+5] Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[V+5].[V+5] XHCLAFWTIXFWPH-UHFFFAOYSA-N 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000002308 calcification Effects 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 159000000007 calcium salts Chemical class 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 238000009851 ferrous metallurgy Methods 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000002905 metal composite material Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- HUAUNKAZQWMVFY-UHFFFAOYSA-M sodium;oxocalcium;hydroxide Chemical compound [OH-].[Na+].[Ca]=O HUAUNKAZQWMVFY-UHFFFAOYSA-M 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 150000003681 vanadium Chemical class 0.000 description 1
- 229910001935 vanadium oxide Inorganic materials 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
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- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The invention discloses a kind of vanadium-bearing hot metal vanadium extraction and dephosphorization agent, 1) first prepare dephosphorizing agent and vanadium extraction agent respectively; The chemical composition of dephosphorizing agent and proportioning be, Fe
2o
345 ~ 55wt%, CaO35 ~ 47wt%, Al
2o
32 ~ 5wt%, SiO
2aMP.AMp.Amp lt; 4wt%; Dephosphorizing agent is at high temperature sintered and generates the calcareous dephosphorizing agent of ferrous acid; The chemical composition of vanadium extraction agent and proportioning be, Fe
2o
350 ~ 70wt%, Al
2o
35 ~ 10wt%, SiO
25 ~ 20wt%, MgO5 ~ 15wt%; 2) calcareous for ferrous acid dephosphorizing agent and vanadium extraction agent mixed according to the mass ratio of 1:0.5 ~ 3 and obtain vanadium extraction and dephosphorization agent.Vanadium extraction and dephosphorization agent of the present invention can obtain higher vanadium extraction rate and dephosphorization rate simultaneously, alleviates the dephosphorization load of semi-steel making process, obtains the qualified vanadium slag of composition and low-phosphorous half steel simultaneously.
Description
Technical field
The present invention relates to vanadium extraction from hot metal dephosphorizing technology, specifically refer to a kind of vanadium-bearing hot metal vanadium extraction and dephosphorization agent, belong to ferrous metallurgy auxiliary material technical field.
Background technology
Vanadium many employings blast furnace ironmaking in current China vanadium titano-magnetite-converter duplex process for extracting vanadium extracts, and namely first vanadium extraction in a converter, then pours into half steel in another converter and carry out semi-steel making.Produce the vanadium slag obtained, by subsequent oxidation sinter process, Low Valent Vanadium is converted into high price vanadium, then adopt the mode of wet-leaching to leach in solution by pentavalent vanadium, obtain vanadium product through purification precipitation process.But, the CaO that the vanadium slag that traditional vanadium slag sodium roasting-water logging processing requirement vanadium extraction by converter blowing process obtains contains can not more than 2.5%, cause existing vanadium extraction by converter blowing can not add lime slag making dephosphorization, make follow-up semi-steel dephosphorizing load large, produce Low-phosphorus Steel and ultra-low phosphoretic steel difficulty.This is because the heating elements such as vanadium extraction by converter blowing process Si, Mn are oxidized completely substantially, semi-steel making process lacks the slagging elements such as Si, Mn, and start blowing be namely oxidized C, FeO in slag
xcontent is lower, cause lime to melt and slagging comparatively slow, be difficult to the larger slag of formation high alkalinity, high oxidative, amount and reach the object of high efficiency dephosphorating.
Sodium vanadium-extracting roasting process can produce Cl
2, the dusty gas such as HCl, and the method is strict with the CaO content in vanadium slag.So calcification vanadium extraction, namely vanadium slag adds calcium salt roasting, then adopts the clean extraction vanadium method of acidleach or alkaline-leaching and vanadium extraction to come into one's own gradually, and reaches its maturity.For adding in vanadium extraction by converter blowing process the Dephosphorization that lime realizes vanadium extraction, subsequent technique basis laid by acquisition high calcium vanadium slag and low-phosphorous half steel.High calcium vanadium slag obtains containing vanadium solution through direct roasting-acid (alkali) leaching, and then obtains vanadium product.Low-phosphorous semi-steel making process dephosphorization load alleviates, and is convenient to smelt ultra-low phosphoretic steel.So exploitation vanadium extraction by converter blowing process vanadium extraction and dephosphorization agent, to alleviating semi-steel making load, to realize clean vanadium extraction technology extremely important.
At present in the published technology about vanadium-bearing hot metal vanadium extraction and dephosphorization, mostly be in vanadium-bearing hot metal, add lime oxygen blast carry out selective oxidation vanadium, phosphorus, or add vanadium extraction and dephosphorization agent lime, ferrous material and magnesian prepared in advance by a certain percentage and carry out vanadium extraction and dephosphorization.Its essence still adds lime in vanadium-bearing hot metal, and is mostly to add at the vanadium extraction initial stage.Publication number is that the Chinese patent of CN103194565A discloses a kind of method of vanadium-bearing hot metal being carried out simultaneously to vanadium extraction and dephosphorization, opens to blow in 1 ~ 2min to add in converter to control finishing slag basicity at the lime of 2 ~ 4 and the iron scale of 15 ~ 20kg/tFe at vanadium extraction and dephosphorization.Publication number is that the Chinese patent of CN101302578A discloses a kind of vanadium-bearing hot metal composite vanadium extraction and dephosphorization agent and preparation method thereof, lime, ferrous material, magnesia, siliceous material and solubility promoter are mixed with the CaO consisting of 0% ~ 30%, the TFe of 40% ~ 65%, the SiO of 3% ~ 15%
2, 0% ~ 15%MgO and 0% ~ 15%Al
2o
3composite vanadium extraction and dephosphorization agent.Specific implementation process carries out vanadium extraction and dephosphorization for directly adding this kind of composite vanadium extraction and dephosphorization agent in vanadium-bearing hot metal.And stone fusion point of ash is higher, the initial stage adds more causing of meeting slag difficulty, and temperature drop is serious, not only causes disadvantageous effect to vanadium-bearing hot metal dephosphorization, also can reduce vanadium extraction rate.
Summary of the invention
For prior art above shortcomings, the object of this invention is to provide a kind of vanadium-bearing hot metal vanadium extraction and dephosphorization agent, this vanadium extraction and dephosphorization agent can obtain higher vanadium extraction rate and dephosphorization rate simultaneously, achieves effective combination of vanadium extraction and dephosphorization, alleviates the dephosphorization load of steelmaking process.
Technical scheme of the present invention is achieved in that
A kind of vanadium-bearing hot metal vanadium extraction and dephosphorization agent, prepares by the following method,
1) dephosphorizing agent and vanadium extraction agent is first prepared respectively; The chemical composition of dephosphorizing agent and proportioning be, Fe
2o
345 ~ 55wt%, CaO35 ~ 47wt%, Al
2o
32 ~ 5wt%, SiO
2<4wt%; Dephosphorizing agent is at high temperature sintered and generates the calcareous dephosphorizing agent of ferrous acid; The chemical composition of vanadium extraction agent and proportioning be, Fe
2o
350 ~ 70wt%, Al
2o
35 ~ 10wt%, SiO
25 ~ 20wt%, MgO5 ~ 15wt%; Wherein, the sintering temperature that dephosphorizing agent sintering generates the calcareous dephosphorizing agent of ferrous acid is 1000 ~ 1200 DEG C, and sintering time is 0.5 ~ 2 hour.
2) calcareous for ferrous acid dephosphorizing agent and vanadium extraction agent mixed according to the mass ratio of 1:0.5 ~ 3 and obtain vanadium extraction and dephosphorization agent.
The raw material particle size forming dephosphorizing agent and vanadium extraction agent is 0.048 ~ 0.106mm, before the calcareous dephosphorizing agent of ferrous acid and vanadium extraction agent mix, is broken into the powder of 0.048 ~ 0.106mm after the calcareous dephosphorizing agent of ferrous acid need cool.
The raw material forming dephosphorizing agent is lime, ferriferous raw material, siliceous raw material and fusing assistant powder; The raw material forming vanadium extraction agent is ferriferous raw material, siliceous raw material, magnesia raw material and fusing assistant powder; Ferriferous raw material is iron scale or cooled agglomerated pellet; Siliceous raw material is quartzite, quartzose sandstone or vein quartz; Magnesia raw material is magnesia or dolomite sand; Solubility promoter is bauxitic clay; Carry out taking of raw material in conjunction with the chemical composition of dephosphorizing agent and vanadium extraction agent and proportioning namely configurablely obtain dephosphorizing agent and vanadium extraction agent according to the chemical component situation of each raw material.
Compared to existing technology, the present invention has following beneficial effect:
Vanadium extraction and dephosphorization agent of the present invention can obtain higher vanadium extraction rate and dephosphorization rate simultaneously, alleviates the dephosphorization load of semi-steel making process, obtains the qualified vanadium slag of composition and low-phosphorous half steel simultaneously.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail.
The preparation of the fragmentation that the preparation of vanadium-bearing hot metal vanadium extraction and dephosphorization agent of the present invention relates to raw material and oven dry, dephosphorizing agent and vanadium extraction agent, dephosphorizing agent prepares the calcareous dephosphorizing agent of ferrous acid, the calcareous dephosphorizing agent of ferrous acid mixes with vanadium extraction agent.Respectively each link is described in detail by preparation order below.
1, raw material choose and broken.Because the chemical composition of dephosphorizing agent in the present invention and proportioning are, Fe
2o
345 ~ 55wt%, CaO35 ~ 47wt%, Al
2o
32 ~ 5wt%, SiO
2<4wt%; The chemical composition of vanadium extraction agent and proportioning be, Fe
2o
350 ~ 70wt%, Al
2o
35 ~ 10wt%, SiO
25 ~ 20wt%, MgO5 ~ 15wt%; Certainly this wherein all comprises appropriate impurity, wherein Al
2o
3be fusing assistant.So the raw material forming dephosphorizing agent of the present invention is lime, ferriferous raw material, siliceous raw material and fusing assistant powder; The raw material forming vanadium extraction agent is ferriferous raw material, siliceous raw material, magnesia raw material and fusing assistant powder.During concrete selection, ferriferous raw material is iron scale or cooled agglomerated pellet; Siliceous raw material is quartzite, quartzose sandstone or vein quartz; Magnesia raw material is magnesia or dolomite sand; Solubility promoter is bauxitic clay.Above-mentioned raw materials needs to be crushed to 0.048 ~ 0.106mm and dries with for subsequent use.
2, carry out taking of raw material according to the chemical component situation of each raw material in conjunction with the chemical composition of dephosphorizing agent and vanadium extraction agent and proportioning, then configuration can obtain dephosphorizing agent and vanadium extraction agent.
3, dephosphorizing agent is at high temperature sintered the calcareous dephosphorizing agent of generation ferrous acid; Sintering temperature is 1000 ~ 1200 DEG C, and sintering time is 0.5 ~ 2 hour.
Calcium ferrite is a kind of Iron-containing silicate, mainly contains dicalcium ferrite 2CaO ﹒ Fe
2o
3(C
2f), calcium ferrite CaO ﹒ Fe
2o
3(CF), calcium diferrite CaO ﹒ 2Fe
2o
3(CF
2).The reaction formula of the generation of calcium ferrite is as follows:
CaO+Fe
2O
3＝2CaO·Fe
2O
3(1)
CaO+Fe
2O
3＝CaO·Fe
2O
3(2)
CaO·Fe
2O
3+Fe
2O
3＝CaO·2Fe
2O
3(3)
First reaction generates CaO ﹒ Fe
2o
3, then CaO and CaO ﹒ Fe
2o
3reaction generates 2CaO ﹒ Fe
2o
3, CaO ﹒ Fe
2o
3with Fe
2o
3generate CaO ﹒ 2Fe
2o
3.
4, the calcareous dephosphorizing agent of ferrous acid cools after sintering and is broken into the powder of 0.048 ~ 0.106mm.
5, calcareous for ferrous acid dephosphorizing agent powder and vanadium extraction agent powder are mixed according to the mass ratio of 1:0.5 ~ 3, the particle utilizing ball press etc. to be made into 5 ~ 50mm is vanadium extraction and dephosphorization agent finished product.
After obtaining vanadium extraction and dephosphorization agent finished product, according to producing actual needs, appropriate vanadium extraction and dephosphorization agent can be added at vanadium extracting process, to obtain the qualified vanadium slag of composition and low-phosphorous half steel.
Below provide the actual vanadium extraction of vanadium extraction and dephosphorization agent and dephosphorization effect that three groups of embodiments obtain with comparative illustration different components and preparation process.The raw material of three groups of embodiment employings is identical, and raw material actual constituent is as shown in table 1:
The each material composition of table 1 vanadium extraction and dephosphorization agent is formed, Wt%
| Raw material | CaO | MgO | SiO 2 | Al 2O 3 | Fe 2O 3 | FeO |
| Lime | >91.30 | <0.70 | <2.80 | / | / | / |
| Siliceous raw material | / | / | >60.00 | 21.25～22.10 | 1.40～1.57 | / |
| Magnesia raw material | 21.17～57.03 | 40.10～76.29 | <2.60 | <3.17 | 0.74～2.03 | / |
| Bauxitic clay | / | 0.11～0.30 | 7.60～40.50 | 54.10～86.20 | 1.46～1.92 | / |
| Ferriferous raw material | <0.5 | 0.6～0.9 | 2～8 | / | 36～57 | 37～58 |
Example 1
According to the preparation method of above-mentioned vanadium extraction and dephosphorization agent, prepare 9 groups of calcareous dephosphorizing agents of ferrous acid.The significant parameter of its composition and preparation is as shown in table 2.Prepare the vanadium extraction agent that 3 groups of components are different simultaneously, as shown in table 3.Calcareous for the ferrous acid obtained dephosphorizing agent is become 11 groups of vanadium extraction and dephosphorization agents with vanadium extraction agent according to the proportions of 1:0.5.
In the induction furnace that 10kg vanadium-bearing hot metal (V0.3wt%, P0.08wt%) is housed, add the ratio of 40kg vanadium extraction and dephosphorization agent in molten iron per ton, in vanadium-bearing hot metal, add the vanadium extraction and dephosphorization agent of the difference composition of above-mentioned preparation.The vanadium extraction and dephosphorization effect of vanadium extraction and dephosphorization agent to vanadium-bearing hot metal is as shown in table 4.
The calcareous dephosphorizing agent of table 2 ferrous acid forms and prepares significant parameter
The composition of table 3 vanadium extraction agent, Wt%
| Numbering | Fe 2O 3 | Al 2O 3 | SiO 2 | MgO | Impurity |
| G1 | 50 | 10 | 20 | 15 | 5 |
| G2 | 60 | 8 | 15 | 10 | 7 |
| G3 | 70 | 5 | 10 | 5 | 10 |
The composition of table 4 vanadium extraction and dephosphorization agent and the effect of vanadium extraction and dephosphorization thereof
Example 2
According to the preparation method of above-mentioned vanadium extraction and dephosphorization agent, the roasting time of calcareous for ferrous acid dephosphorizing agent is increased to 1 hour by the basis of example 1, prepares 9 groups of calcareous dephosphorizing agents of ferrous acid.The significant parameter of its composition and preparation is as shown in table 5.The composition of vanadium extraction agent is as shown in table 3.Calcareous for the ferrous acid obtained dephosphorizing agent and vanadium extraction agent are obtained 11 groups of vanadium extraction and dephosphorization agents according to the proportions of 1:1.
In the induction furnace that 10kg vanadium-bearing hot metal (V0.28wt%, P0.09wt%) is housed, add the ratio of 50kg vanadium extraction and dephosphorization agent in molten iron per ton, in vanadium-bearing hot metal, add the vanadium extraction and dephosphorization agent of the difference composition of above-mentioned preparation.The composition of vanadium extraction and dephosphorization agent and as shown in table 6 to the vanadium extraction and dephosphorization effect of vanadium-bearing hot metal.
The calcareous dephosphorizing agent of table 5 ferrous acid forms and prepares significant parameter
The composition of table 6 vanadium extraction and dephosphorization agent and the effect of vanadium extraction and dephosphorization thereof
Example 3
According to the preparation method of above-mentioned vanadium extraction and dephosphorization agent, the roasting time of calcareous for ferrous acid dephosphorizing agent is increased to 2 hours by the basis of example 1, prepares 9 groups of calcareous dephosphorizing agents of ferrous acid.The significant parameter of its composition and preparation is as shown in table 7.The composition of vanadium extraction agent is as shown in table 3.Calcareous for the ferrous acid obtained dephosphorizing agent and vanadium extraction agent are carried out mixed preparing according to the ratio of 1:2 and obtains 11 groups of vanadium extraction and dephosphorization agents.
In the induction furnace that 10kg vanadium-bearing hot metal (V0.33wt%, P0.10wt%) is housed, add the ratio of 50kg vanadium extraction and dephosphorization agent in molten iron per ton, in vanadium-bearing hot metal, add the vanadium extraction and dephosphorization agent of the difference composition of above-mentioned preparation.The composition of vanadium extraction and dephosphorization agent and as shown in table 8 to the vanadium extraction and dephosphorization effect of vanadium-bearing hot metal.
The calcareous dephosphorizing agent of table 7 ferrous acid forms and prepares significant parameter
The composition of table 8 vanadium extraction and dephosphorization agent and the effect of vanadium extraction and dephosphorization thereof
By the comparison of vanadium extraction and dephosphorization net effect, can find out, in example 1 and example 2, these six groups of vanadium extraction and dephosphorization agents of C1+G3, C2+G3, C3+G3 are schemes of comparative optimization.
The common conditions of vanadium extraction and dephosphorization is high oxidative and low temperature, and dephosphorization also needs higher basicity in addition.There is at present the technology of vanadium extraction and dephosphorization in disclosed patent, but be mostly to add lime in vanadium-bearing hot metal and selective oxidation vanadium, phosphorus are carried out in oxygen blast; Or add the vanadium extraction and dephosphorization agent that lime, ferrous material and magnesian are prepared by a certain percentage.Both essence is all add lime dephosphorization in molten iron, and is mostly to add at initial smelting period.And lime fusing point is very high, in stove, molten iron temperature is not enough to make a large amount of lime rapid meltings, and causing slag is slow, and the mobility of slag entirety is bad, so Threshing injury is comparatively slow, vanadium extraction speed is also slow.When stove sodalime melts slagging completely, due to the oxidative heat generation of the elements such as Si, Mn, the C in molten iron, the temperature in stove is higher, leaves the sands are running out (because temperature is in continuous rising) of dephosphorization and vanadium extraction for, causes vanadium extraction and dephosphorization rate not high.
And the vanadium extraction and dephosphorization agent used in the present invention vanadium extraction and dephosphorization agent that to be ferrous acid calcareous, calcium ferrite is the material that ferric oxide and calcium oxide generate in certain temperature, and its fusing point is far below lime.So the calcareous vanadium extraction and dephosphorization agent of this ferrous acid has, fusing point is low, the fireballing advantage of slagging.The calcareous vanadium extraction and dephosphorization agent of ferrous acid adds rapid slagging after in vanadium-bearing hot metal, utilizes cold condition optionally vanadium oxide, the phosphorus of initial smelting period.Effectively solve the proceduring slag speed of vanadium extraction and dephosphorization slow, the problem that vanadium extraction and dephosphorization deficiency of time, effect are bad.
The above embodiment of the present invention is only for example of the present invention is described, and is not the restriction to embodiments of the present invention.For those of ordinary skill in the field, other multi-form change and variations can also be made on the basis of the above description.Here cannot give exhaustive to all embodiments.Every belong to technical scheme of the present invention the apparent change of amplifying out or variation be still in the row of protection scope of the present invention.
Claims (3)
1. a vanadium-bearing hot metal vanadium extraction and dephosphorization agent, is characterized in that: prepare by the following method,
1) dephosphorizing agent and vanadium extraction agent is first prepared respectively; The chemical composition of dephosphorizing agent and proportioning be, Fe
2o
345 ~ 55wt%, CaO35 ~ 47wt%, Al
2o
32 ~ 5wt%, SiO
2<4wt%; At high temperature sintered by dephosphorizing agent and generate the calcareous dephosphorizing agent of ferrous acid, the sintering temperature that dephosphorizing agent sintering generates the calcareous dephosphorizing agent of ferrous acid is 1000 ~ 1200 DEG C, and sintering time is 0.5 ~ 2 hour; The chemical composition of vanadium extraction agent and proportioning be, Fe
2o
350 ~ 70wt%, Al
2o
35 ~ 10wt%, SiO
25 ~ 20wt%, MgO5 ~ 15wt%;
2) calcareous for ferrous acid dephosphorizing agent and vanadium extraction agent mixed according to the mass ratio of 1:0.5 ~ 3 and obtain vanadium extraction and dephosphorization agent.
2. vanadium-bearing hot metal vanadium extraction and dephosphorization agent according to claim 1, it is characterized in that: the raw material particle size forming dephosphorizing agent and vanadium extraction agent is 0.048 ~ 0.106mm, before the calcareous dephosphorizing agent of ferrous acid and vanadium extraction agent mix, after the calcareous dephosphorizing agent of ferrous acid need cool, be broken into the powder of 0.048 ~ 0.106mm.
3. vanadium-bearing hot metal vanadium extraction and dephosphorization agent according to claim 2, is characterized in that: the raw material forming dephosphorizing agent is lime, ferriferous raw material, siliceous raw material and fusing assistant powder; The raw material forming vanadium extraction agent is ferriferous raw material, siliceous raw material, magnesia raw material and fusing assistant powder; Ferriferous raw material is iron scale or cooled agglomerated pellet; Siliceous raw material is quartzite, quartzose sandstone or vein quartz; Magnesia raw material is magnesia or dolomite sand; Solubility promoter is bauxitic clay; Carry out taking of raw material in conjunction with the chemical composition of dephosphorizing agent and vanadium extraction agent and proportioning namely configurablely obtain dephosphorizing agent and vanadium extraction agent according to the chemical component situation of each raw material.
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| CN104878222A (en) * | 2015-06-09 | 2015-09-02 | 钢铁研究总院 | Hot-metal-ladle vanadium extraction method |
| JP6481774B2 (en) * | 2016-01-05 | 2019-03-13 | 新日鐵住金株式会社 | Molten iron dephosphorizing agent, refining agent and dephosphorizing method |
| CN113122672A (en) * | 2021-04-20 | 2021-07-16 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for dephosphorizing semisteel steelmaking converter after furnace |
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| CN101302578A (en) * | 2008-06-27 | 2008-11-12 | 攀钢集团攀枝花钢铁研究院有限公司 | Composite vanadium extraction and dephosphorization agent for vanadium-containing molten iron and preparation thereof |
| CN102453788A (en) * | 2010-10-21 | 2012-05-16 | 金素玉 | Preparation method of converter steelmaking dephosphorizing agent |
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| CN102453788A (en) * | 2010-10-21 | 2012-05-16 | 金素玉 | Preparation method of converter steelmaking dephosphorizing agent |
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