CN107447160A - Reduce the smelting process of the residual vanadium of ferrovanadium slag - Google Patents
Reduce the smelting process of the residual vanadium of ferrovanadium slag Download PDFInfo
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- CN107447160A CN107447160A CN201710610957.1A CN201710610957A CN107447160A CN 107447160 A CN107447160 A CN 107447160A CN 201710610957 A CN201710610957 A CN 201710610957A CN 107447160 A CN107447160 A CN 107447160A
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- refining
- vanadium
- slag
- smelting process
- residual
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C35/00—Master alloys for iron or steel
-
- 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
- C21C7/0006—Adding metallic additives
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B5/00—General methods of reducing to metals
- C22B5/02—Dry methods smelting of sulfides or formation of mattes
- C22B5/04—Dry methods smelting of sulfides or formation of mattes by aluminium, other metals or silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
- C22B9/05—Refining by treating with gases, e.g. gas flushing also refining by means of a material generating gas in situ
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The invention discloses a kind of smelting process, especially discloses a kind of smelting process for reducing the residual vanadium of ferrovanadium slag, belongs to vanadium titanium smelting process technical field.A kind of smelting process for the residual vanadium of reduction ferrovanadium slag that energy consumption is low, flow is short, yield of alloy is high is provided.Residual content of vanadium in double refining reduction clinker of the described smelting process by adding refinery after the slightly row's of refining lean slag, wherein, when slightly refining and refining, gas is respectively sprayed into again after corresponding raw materials for metallurgy adds completion and completely formation molten bath and smelts work in the last molten bath of the condition completion of stirring.
Description
Technical field
The present invention relates to a kind of smelting process, more particularly, to a kind of smelting process for reducing the residual vanadium of ferrovanadium slag,
Belong to vanadium titanium smelting process technical field.
Background technology
Vanadium iron is important steel-smelting alloy additive, generally use V2O5Electro silicothermic process smelting process is smelted, the smelting
The mature production technology of method, equipment is advanced, and product quality is stable, foreign countries use the vanadium recovery of electro silicothermic process be 95% with
On, the country uses V2O5The vanadium iron product quality and vanadium recovery of electro silicothermic process technique productions still have necessarily with Foreign Advanced Lerel
Gap.In addition, also many enterprises prepare vanadium iron using electro-aluminothermic process both at home and abroad, and it is smelted compared with electro silicothermic process
Time is short, and the working of a furnace is easily controlled, and labor strength is low, and product quality is stable, and environmental pollution is small, and integrated cost is low.Usually
By V2O3Or V2O5And the material such as abrasive grit, aluminium powder loads in electric furnace, electrified regulation, reaction is promoted to carry out.Smelted with electro-aluminothermic process high
Vanadium iron can make the rate of recovery of vanadium also can be to more than 95%, and in order to reach higher technical-economic index, each vanadium iron manufacturer makees again
Further technological improvement, for example the CASA factories of Luxembourg and climb steel North Sea special type ferroalloy Co., Ltd just in electro-aluminothermic process
On the basis of, add a set of blowing device.The residual vanadium in slag is set to be reduced to less than 1.2% from 2% by the equipment, so as to
Vanadium recovery is set to bring up to more than 97%.The technological process of electro-aluminothermic process smelting ferrovanadium is as follows, as shown in Figure 1.
In order to which barium oxide is fully reduced in actual production, excessive aluminium powder is typically all added, this will result in conjunction
Aluminium content is higher in gold；Slag melting is high, smelting temperature is higher, is unfavorable for smelting and is smoothed out；In slag the problems such as shim.Now
In order to which the aluminium in alloy smelting is removed, typically using V2O5As oxidant by alumina；Meanwhile in order to reduce the fusing point of slag and
Mobility, frequently with CaF2For slag adjusting agent.This method not only increases cost, causes in slag content of vanadium higher, it is necessary to by richness
Vanadium slag returns to be used in stove, adds smelting operation difficulty, and add CaF2Clinker can cause to corrode to furnace lining afterwards.Therefore,
A kind of cheap, easy to control, non-corrosive slag adjusting agent is needed to be improved existing process.
Patent " method disclosed in the method CN102115821B " of smelting ferrovanadium：By 10wt%~35wt% lime,
15wt %~35wt% aluminium and the V2O3 of surplus and/or V2O5 are made into compound；Electric furnace is added mixture into, is pressed simultaneously
As requested adds the iron of scheduled volume；Material in energization smelting electrical furnace, to reduce V2O3 and/or V2O5 by aluminium, treat clinker
In full content of vanadium when being less than 0.2wt%, go out 80wt%~95wt% clinker；Again will be by lime 15wt%~35wt%, iron oxygen
Compound 0wt %~30wt% and surplus are that the refinery of V2O5 compositions is added in electric furnace according to 10~80kg/t vanadium iron, carry out essence
Refining, treats the aluminium content in vanadium iron liquid and content of vanadium meets the vanadium iron product to be produced to aluminium content and content of vanadium
It is required that when, go out aluminium alloy and refining slag；Casting, obtains vanadium iron product.
" the method CN102206754A " of production vanadium iron is characterized in that to be comprised the following steps patent：A, dispensing：Vanadium will be contained
Raw material, iron oxide red, aluminium powder, CaO are uniformly mixed so as to obtain mixed material；Wherein, described is in ammonium poly-vanadate, ammonium metavanadate containing vanadium raw materials
It is at least one；Counted containing vanadium raw materials using vanadium, iron oxide red is using the weight proportion that iron is counted as 1: 0.16~0.26；It is 1.05 with aluminium coefficient
~1.15, described aluminium coefficient of matching somebody with somebody is the fine aluminium weight ratio that the fine aluminium weight being actually added into adds with theoretical calculation needs；Match somebody with somebody
CaO coefficients are 0.35~0.47, and described CaO coefficients of matching somebody with somebody are the fine aluminium that the CaO weight being actually added into need to add with theoretical calculation
Weight ratio；B, pelletizing：Gained mixed material pelletizing, pelletizing are dried；C, stove smelting is entered：Dried pelletizing enters stove and smelted to mixed
It is complete to close material reaction；D, come out of the stove, obtain vanadium iron.
" the method CN102206754B " of production vanadium iron is characterized in that to be comprised the following steps patent：A, dispensing：Vanadium will be contained
Raw material, iron oxide red, aluminium powder, CaO are uniformly mixed so as to obtain mixed material；Wherein, described is in ammonium poly-vanadate, ammonium metavanadate containing vanadium raw materials
It is at least one；Counted containing vanadium raw materials using vanadium, iron oxide red is using the weight proportion that iron is counted as 1:0.16~0.26；With aluminium coefficient be 1.05~
1.15, described aluminium coefficient of matching somebody with somebody is the fine aluminium weight ratio that the fine aluminium weight being actually added into adds with theoretical calculation needs；With CaO
Coefficient is 0.35~0.47, and described CaO coefficients of matching somebody with somebody are the fine aluminium weight that the CaO weight being actually added into need to add with theoretical calculation
The ratio between；Wherein, the granularity containing vanadium raw materials is 0.040~0.300mm, the granularity of the iron oxide red for 0.090~
0.250mm, the granularity of the aluminium powder is 0.063~0.250mm, and the granularity of the CaO is 0.09~10.00mm；Described is more
The V2O5 contents of ammonium vanadate are 80.00~91.00wt%, iron oxide red its Fe2O3 contents >=97.0wt%, aluminium powder in terms of Fe2O3
Al content >=99.0wt%；Described CaO is the quick lime or white lime that CaO content is 66.45~90.00wt%；B, pelletizing：
Gained mixed material pelletizing, pelletizing are dried；C, stove smelting is entered：Dried pelletizing enters stove and smelted to mixed material reaction completely；
D, come out of the stove, obtain vanadium iron.
" the smelting process CN 101724752B " steps of middle vanadium iron are as follows for patent：A, bed material and major ingredient are prepared；B, smelt just
Phase, it is firstly added bed material and is smelted；C, after bed material reacting balance, major ingredient is added；D, refine.Wherein, bed material be aluminium,
V2O5, iron, lime；Major ingredient is V2O3, aluminium, V2O5, iron, lime, fluorite.The inventive method both takes full advantage of reaction heat, and simple
Technical process is changed, has reduced the viscosity of clinker, vanadium iron smelting recovery is steadily improved up to more than 96%.
" a kind of method CN103045929A " of electro-aluminothermic process production vanadium iron is characterized in that, methods described includes patent：
A) compounding includes the metallurgical raw material of barium oxide, aluminum shot, iron filings and lime；B) reducing and smelting is carried out in smelting furnace and also
Original is slagged tap at the end of smelting；C) iron-based oxide is added into vanadium iron liquid so that the Al content in vanadium iron liquid to be reduced to
No more than 0.5%.
" a kind of method CN103045929B " of electro-aluminothermic process production vanadium iron is characterized in that, methods described includes patent：
A) compounding includes the metallurgical raw material of barium oxide, aluminum shot, iron filings and lime；B) reducing and smelting is carried out in smelting furnace and also
Original is slagged tap at the end of smelting；C) refining stage, including go out vanadium iron liquid to ladle, going out vanadium iron liquid to ladle
During iron-based oxide is added in ladle so that the Al content in vanadium iron liquid is reduced to no more than 0.5%；In step
It is rapid b) in, the Al content in vanadium iron liquid is controlled 1.5%~6.0%, when V content in metallurgical slag is not more than 1%
Slag tap.
" a kind of smelting process CN103757171B " of high vanadium ferroalloy is characterized in that, methods described includes following step to patent
Suddenly：A, it is cold conditions richness containing vanadium slag and lime addition electric arc furnaces is rebasing, add and be made up of vanadic anhydride, aluminum shot, lime, steel cuttings
A phase compound smelted, with will a upper stove the hot slag of richness containing vanadium return electric arc furnaces in, the vanadium in metallurgical slag contains
Amount is slagged tap when being less than 0.5%, wherein, the hot slag of richness containing vanadium being back in electric arc furnaces realizes the purpose of striking igniting；
B, add the second stage of compound being made up of vanadium trioxide, aluminum shot, lime, steel cuttings to be smelted, the content of vanadium in metallurgical slag
Slagged tap during less than 0.5 %, and aluminium or almag progress reduction treatment are added before slagging tap；C, add by vanadic anhydride
The refining compound formed with lime or by iron scale with lime is smelted, and the temperature for controlling vanadium iron liquid in stove is 1900 DEG C
More than, and the content of vanadium in vanadium iron liquid be 78~82% and aluminium content be less than 1.5% when go out vanadium iron liquid and containing vanadium
Rich slag, vanadium iron liquid is poured into preheating up in more than 500 DEG C of ingot mould, cooling, the demoulding, obtains content of vanadium after crushing and exist
More than 80% high vanadium ferroalloy.
Existing patented technology does not solve above-mentioned technical problem present in prior art above.
The content of the invention
The technical problems to be solved by the invention are：The reduction vanadium that a kind of energy consumption is low, flow is short, yield of alloy is high is provided
The smelting process of the residual vanadium of iron smelted furnace cinder.
Technical scheme is used by solve above-mentioned technical problem：A kind of smelter for reducing the residual vanadium of ferrovanadium slag
Skill, described smelting process reduce the residual content of vanadium in clinker by the double refining of addition refinery after the slightly row's of refining lean slag,
Wherein, in thick refining and refining, respectively sprayed again after corresponding raw materials for metallurgy adds completion and forms molten bath completely
Enter gas and last molten bath smelting work is completed in the condition of stirring.
The beneficial effects of the invention are as follows：The secondary fine that the process of the application passes through addition refinery after the slightly row's of refining lean slag
Refining reduces the residual content of vanadium in clinker, and when in thick refining and refining, respectively adds and completes and complete in corresponding raw materials for metallurgy
Holotype smelts work into spraying into condition of the gas in stirring behind molten bath again and complete last molten bath.So, by then passing through circulation
Mode add refinery into the smelting furnace after thick refining discharge lean slag and smelted again, complete lot until smelting
Raw materials for metallurgy, so as to which so as to smelted repeatedly to it before tailings discharge, low residual content of vanadium in tailings is discharged with realization,
After being significantly reduced due to the residual content of vanadium in discharge tailings, the high recovery rate of alloy is conversely achieved that.Simultaneously as thick
Injection stirring has been carried out when refining and refining, being sufficiently mixed and reacting for raw materials for metallurgy in molten bath can also be improved, reduced not anti-
The presence of residual vanadium is answered, and reduces the reaction time, and then the further recovery rate for improving alloy, reduce energy consumption.Furthermore due to
Only smelted in whole smelting process including the molten bath under jet stirring condition in dispensing, the starting the arc, melt tank reaction and course of reaction
Several programs, so can also ensure that smelting program is brief.
It is further that described refinery is by V2O5, lime, iron sheet, ferrovanadium fine powder and fluorite mix.
It is further that the raw materials for metallurgy of thick refining row lean slag is lime, aluminium powder, V2O3And the ratio of abrasive grit coordinates.
It is further, in refining process, when a length of 1~3min of jet stirring.
Such scheme it is preferable that, during thick refining row lean slag, when a length of 3~5min of jet stirring.
It is further that the stirring gas that jet sprays into when stirring is argon gas and/or nitrogen, and the air pressure of ejiction opening is 0.3
~0.7MPa, ejection intensity are 0.1~0.3Nm3/(t.min)。
It is further that, in thick refining, thick four batches of raw material point of refining add, and after each batch is completely melting down again
Add the raw materials for metallurgy of next batch；In refining, refinery feedstock disposably all adds.
Brief description of the drawings
Fig. 1 is the process chart for the electro-aluminothermic process smelting ferrovanadium being related in background of invention.
Embodiment
In order to solve above-mentioned technical problem present in prior art, a kind of energy consumption provided by the invention is low, flow is short, closes
The smelting process of the high residual vanadium of reduction ferrovanadium slag of golden recovery rate.Described smelting process after the slightly row's of refining lean slag by adding
The double refining of refinery reduces the residual content of vanadium in clinker, wherein, in thick refining and refining, respectively in corresponding raw materials for metallurgy
Gas is sprayed into after addition completion and completely formation are molten again and smelts work in the last molten bath of the condition completion of stirring.The work of the application
Process, which passes through, to be added the double refining of refinery and reduces residual content of vanadium in clinker after the slightly row's of refining lean slag, and in thick refining and
During refining, gas is respectively sprayed into again after corresponding raw materials for metallurgy addition completion and completely formation are molten and is completed most in the condition of stirring
Molten bath afterwards smelts work.So, added and refined into the smelting furnace after thick refining discharge lean slag from the mode for then passing through circulation
Material is smelted again, and lot time raw materials for metallurgy is completed until smelting, so as to so as to be carried out instead to it before tailings discharge
It is multiple to smelt, to realize the low residual content of vanadium being discharged in tailings, after being significantly reduced due to the residual content of vanadium in discharge tailings, conversely
It is achieved that the high recovery rate of alloy.Simultaneously as having carried out injection stirring when in thick refining and refining, can also improve molten
Raw materials for metallurgy is sufficiently mixed and reacted in pond, reduces the presence of the residual vanadium of unreacted, and reduces the reaction time, and then further
Raising alloy recovery rate, reduce energy consumption.Furthermore due in whole smelting process only include dispensing, the starting the arc, melt tank reaction with
And the molten bath in course of reaction under jet stirring condition smelts several programs, so can also ensure that smelting program is brief.
In above-mentioned embodiment, for the present situation of existing raw materials for metallurgy, refinery described herein is by V2O5, lime, iron
Skin, ferrovanadium fine powder and fluorite mix；The raw materials for metallurgy of thick refining row lean slag is lime, aluminium powder, V2O3And the ratio of abrasive grit
Example coordinates.Accordingly, for different raw materials for metallurgy, in refining process, when a length of 1~3min of jet stirring；Slightly refining
During arranging lean slag, when a length of 3~5min of jet stirring.Because jet stirring duration is different, now, refining and the spray slightly refined
Gas agitating parameter can be selected as identical parameter, that is, the stirring gas sprayed into can be argon gas and/or nitrogen, ejiction opening
Air pressure is 0.3~0.7MPa, and it is also 0.1~0.3Nm accordingly to spray intensity3/(t.min)。
Certainly, the difference of raw material is refined according to refinery feedstock and slightly, in order to improve the recovery rate of alloy vanadium to greatest extent,
During thick refining, thick four batches of raw material point of refining add, and add the smelting of next batch again after each batch is completely melting down
Raw material；In refining, refinery feedstock disposably all adds.
In summary, using the smelting process of the present invention, blown due to being employed during electro-aluminothermic process smelting ferrovanadium
The new technology that gas is stirred.The invention can smelt vanadium iron in rear cycle time, vanadium yield>98%, than being produced in existing vanadium iron
3~5 percentage points of 93%~95% vanadium high income of method, so as to reduce vanadium iron smelting cost, increase the performance of enterprises and resource
Utilization rate.
Claims (7)
- A kind of 1. smelting process for reducing the residual vanadium of ferrovanadium slag, it is characterised in that：Described smelting process passes through the slightly row of refining The residual content of vanadium added after lean slag in the double refining reduction clinker of refinery,Wherein, in thick refining and refining, gas is respectively sprayed into again after corresponding raw materials for metallurgy adds completion and forms molten bath completely Body completes last molten bath in the condition of stirring and smelts work.
- 2. the smelting process according to claim 1 for reducing the residual vanadium of ferrovanadium slag, it is characterised in that：Described refining Material is by V2O5, lime, iron sheet, ferrovanadium fine powder and fluorite mix.
- 3. the smelting process according to claim 2 for reducing the residual vanadium of ferrovanadium slag, it is characterised in that：Thick refining row lean slag Raw materials for metallurgy is lime, aluminium powder, V2O3And the ratio of abrasive grit coordinates.
- 4. the smelting process of the residual vanadium of reduction ferrovanadium slag according to claim 1,2 or 3, it is characterised in that：In essence During refining, when a length of 1~3min of jet stirring.
- 5. the smelting process according to claim 4 for reducing the residual vanadium of ferrovanadium slag, it is characterised in that：It is poor in thick refining row During slag, when a length of 3~5min of jet stirring.
- 6. the smelting process according to claim 5 for reducing the residual vanadium of ferrovanadium slag, it is characterised in that：When jet stirs The stirring gas of penetrating is argon gas and/or nitrogen, and the air pressure of ejiction opening is 0.3~0.7MPa, spray intensity be 0.1~ 0.3Nm3/(t.min)。
- 7. the smelting process according to claim 1 for reducing the residual vanadium of ferrovanadium slag, it is characterised in that：In thick refining, Four batches of thick refining raw material point add, and add the raw materials for metallurgy of next batch again after each batch is completely melting down； During refining, refinery feedstock disposably all adds.
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| CN201710610957.1A CN107447160A (en) | 2017-07-25 | 2017-07-25 | Reduce the smelting process of the residual vanadium of ferrovanadium slag |
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| CN201710610957.1A CN107447160A (en) | 2017-07-25 | 2017-07-25 | Reduce the smelting process of the residual vanadium of ferrovanadium slag |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109825704A (en) * | 2019-04-12 | 2019-05-31 | 攀钢集团攀枝花钢铁研究院有限公司 | The smelting process of vanadium iron |
| CN111057843A (en) * | 2019-12-31 | 2020-04-24 | 攀枝花市恒豪铸造有限公司 | Method for producing vanadium-containing pig iron by using vanadium-containing steel slag |
| CN112981141A (en) * | 2021-02-08 | 2021-06-18 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for preparing ferrovanadium alloy from titanium tetrachloride refining tailings |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103173676A (en) * | 2013-03-13 | 2013-06-26 | 北京科技大学 | Method for generating nitrogenous ferrovanadium alloy through utilizing ferrovanadium electric-arc furnace |
-
2017
- 2017-07-25 CN CN201710610957.1A patent/CN107447160A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103173676A (en) * | 2013-03-13 | 2013-06-26 | 北京科技大学 | Method for generating nitrogenous ferrovanadium alloy through utilizing ferrovanadium electric-arc furnace |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109825704A (en) * | 2019-04-12 | 2019-05-31 | 攀钢集团攀枝花钢铁研究院有限公司 | The smelting process of vanadium iron |
| CN109825704B (en) * | 2019-04-12 | 2020-07-21 | 攀钢集团攀枝花钢铁研究院有限公司 | Smelting method of ferrovanadium alloy |
| CN111057843A (en) * | 2019-12-31 | 2020-04-24 | 攀枝花市恒豪铸造有限公司 | Method for producing vanadium-containing pig iron by using vanadium-containing steel slag |
| CN111057843B (en) * | 2019-12-31 | 2021-04-27 | 攀枝花市恒豪铸造有限公司 | Method for producing vanadium-containing pig iron by using vanadium-containing steel slag |
| CN112981141A (en) * | 2021-02-08 | 2021-06-18 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for preparing ferrovanadium alloy from titanium tetrachloride refining tailings |
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Application publication date: 20171208 |