CN104611513B - The Application way of vanadium in a kind of slag - Google Patents
The Application way of vanadium in a kind of slag Download PDFInfo
- Publication number
- CN104611513B CN104611513B CN201510054126.1A CN201510054126A CN104611513B CN 104611513 B CN104611513 B CN 104611513B CN 201510054126 A CN201510054126 A CN 201510054126A CN 104611513 B CN104611513 B CN 104611513B
- Authority
- CN
- China
- Prior art keywords
- steel
- slag
- vanadium
- reducing agent
- heating
- 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
Classifications
-
- 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
Landscapes
- Manufacture And Refinement Of Metals (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The present invention relates to the Application way of vanadium in a kind of slag, belong to metallurgical technology field. Specifically comprises the processes of: the slag of converter tapping enters refine LF furnace rear, adds Calx, fluorite, adds the vanadium oxide in reducing agent reducing slag; Utilizing LF stove electrode concurrent heating, adjusting argon flow amount after heating increases slag interface reaction, promotes reduction reaction simultaneously. The tapping quantity of slag is increased during this method converter tapping, utilize the oxide of vanadium in refine LF stove reduced steel slag, in slag, the oxide of vanadium is reduced to less than 0.03%, molten steel reclaims vanadium 0.008%��0.015%, rephosphorization��0.003%, utilizes vanadium that steel is carried out alloying, reaches the purpose of resource reutilization, disclosure satisfy that smelting process needs, achieve obvious effect.
Description
Technical field
The invention belongs to metallurgical technology field, particularly relate to the Application way of vanadium in a kind of slag.
Background technology
Chengde area vanadium titano-magnetite rich reserves, for world-class vanadium titano-magnetite base, current China and the in the world vanadium extraction of most countries many employings indirect method, namely after first molten iron being smelt in ore deposit, recycling converter oxidation blowing obtains the raw material as vanadium extraction of the slag containing vanadium, semi-steel after extraction of vanadium (i.e. molten iron after vanadium extraction) still contains higher residual vanadium, in addition the restriction of indivedual operation disposal abilities in vanadium-bearing hot metal technological process, part vanadium-bearing hot metal is directly blended into steelmaking converter without vanadium extraction, this process half steel or molten iron have the oxidation of considerable amount of residual vanadium and enters slag, make the V in slag2O5Content is higher, is generally 3��5%.
V-bearing steel slag is high alkalinity, low-grade furnace charge, is mainly composed of CaO40��60%, TFe11��12%, Si027��10%, MgO5��11%, V2O53��5%. V-bearing steel slag is the metallurgical secondary resource of value important, highly advantageous, can as extracting V2O5Important source material, but owing to its calcium, iron content are high, content of vanadium is low, vanadium existence is complicated, Dispersed precipitate in multi mineral mutually in so that vanadium therein is difficult to recycle, current vanadium in vanadium containing steel slag cannot realize resource reutilization, many air storages, and environment is adversely affected.
Summary of the invention
The technical problem to be solved is: V in slag2O5Recycling, mainly through in converter tapping process increase slag go out the quantity of slag, refine utilizes the V in aluminium powder, carborundum, ferrosilicon powder reduced steel slag2O5Enter molten steel, it is achieved vanadium resource recycles.
For solving above-mentioned technical problem, in a kind of slag of the present invention, the Application way of vanadium takes following processing step: the slag of converter tapping enters refine LF furnace rear, adds Calx, fluorite, adds the vanadium oxide in reducing agent reducing slag; Utilizing LF stove electrode concurrent heating, adjusting argon flow amount after heating increases slag interface reaction, promotes reduction reaction simultaneously.
Reducing agent of the present invention is any one or a few in ferrosilicon powder, carborundum, aluminium powder;Reducing agent addition is ferrosilicon powder 0.5-1.0kg/t steel, carborundum 0.5-1.0kg/t steel, aluminium powder 0.5-1.0kg/t steel.
During converter tapping of the present invention, thickness of steel slag is 200-500mm.
Entrance refine LF furnace rear of the present invention adds Calx 3-6kg/t steel, fluorite 1-2kg/t steel, makes CaO/SiO in slag2For 5-8, reducing agent addition 0.5-3.0kg/t steel.
Of the present invention should utilizing LF stove heated by electrodes concurrent heating, heating-up temperature is 1590-1620 DEG C, and heat time heating time is 10-15min.
Argon flow amount 1000-1500nL/min, time 3-5min is adjusted after heating of the present invention.
Slag amount 350mm of the present invention, adds Calx 4kg/t steel, fluorite 1.2kg/t steel, adds reducing agent 1.8kg/t steel, and reducing agent is ferrosilicon powder 0.5kg/t steel, carborundum 0.5kg/t steel, aluminium powder 0.8kg/t steel; CaO/SiO in slag2Being 5, electrode concurrent heating 12min, temperature is 1590 DEG C, argon flow amount 1200nL/min after heating, time 3min.
Slag amount 400mm of the present invention, adds Calx 4.5kg/t steel, fluorite 1.5kg/t steel, adds reducing agent 1.7kg/t steel, and reducing agent is carborundum 0.8kg/t steel, aluminium powder 0.9kg/t steel; CaO/SiO in slag2Being 6, electrode concurrent heating 13min, temperature is 1620 DEG C, argon flow amount 1300nL/min after heating, time 5min.
Slag amount 450mm of the present invention, adds Calx 5.0kg/t steel, fluorite 1.8kg/t steel, adds reducing agent 1.8kg/t steel, and reducing agent is carborundum 0.9kg/t steel, aluminium powder 0.9kg/t steel; CaO/SiO in slag2Being 8, electrode concurrent heating 13min, temperature is 1600 DEG C, argon flow amount 1200nL/min after heating, time 4min.
Theoretical basis of the present invention
Thermodynamics: standard Gibbs free energy that barium oxide reduced by C, Si, Al changes to utilize Basic thermodynamics data to derive.
V2O5(s)+C(s)=2VO2(s)+CO(g)��G0=-49070-213.42T(1)
VO2(s)+1/2C(s)=1/2V2O3(s)+1/2CO(g)��G0=47650.25-79.433T(2)
V2O3(s)+C(s)=2VO(s)+CO(g)��G0=239099.5-163.215T(3)
VO(s)+C(s)=V(s)+CO(g)��G0=310300-165.81T(4)
Owing to V and carbon have bigger affinity, the red-hot vanadium metal generated in reaction can react generation VC, V immediately with carbon2C. The standard Gibbs free energy change of this reaction is shown in for (5), (6) formula.
V(s)+C(s)=VC(s)��G0=-102100+9.58T(5)
2V(s)+C(s)=V2C(s)��G0=-146400+3.35T(6)
At relatively high temperatures, the standard Gibbs free energy change more than reacted be all negative, can occur in terms of thermodynamics, but react (5), (6) need to absorb substantial amounts of heat, therefore react and carry out under refine LF stove heating condition, be conducive to above-mentioned reaction to occur.
V2O5(s)+5/2Si(s)=2V(s)+5/2SiO2(s)��G0=-747710+47.855T(7)
VO2(s)+Si(s)=V(s)+SiO2(s)��G0=-198460+18.07T(8)
V2O3(s)+3/2Si(s)=2V(s)+3/2SiO2(s)��G0=-154240+22.545T(9)
VO(s)+1/2Si(s)=V(s)+1/2SiO2(s)��G0=-27680+6.65T(10)
V2O5(s)+10/3Al(s)=2V(s)+5/3Al5O3(s)��G0=-1280000+132.1T(11)
VO2(s)+4/3Al(s)=V(s)+2/3Al5O3(s)��G0=-410433+18.07T(12)
V2O3(s)+2Al(s)=2V(s)+Al5O3(s)��G0=-472200+75.67T(13)
3VO(s)+2Al(s)=3V(s)+Al5O3(s)��G0=-401000+149.78T(14)
Above-mentioned reaction normal gibbs free energy changeization is all negative, can occur in terms of thermodynamics. Experience according to metal-thermic smelting ferrovanadium alloy, after the reaction heat of above-mentioned reaction reaches certain value, reaction can spontaneous carry out, and exothermic heat of reaction can reach make load melting, reaction and can reach to make the degree of slag sluicing system. During with the oxide of Si reduction vanadium, due to shortage of heat, reaction carries out slowly and incomplete, it is necessary to external heat source, such as electric energy.During with the oxide of aluminium reducing vanadium, the heat release of self just can maintain the carrying out of reaction. And owing to thermit reaction caloric value is had a surplus, inert material also need to be added in furnace charge, to reduce furnace charge caloric value, it is ensured that reacting balance carries out. Thermit reaction carries out speed soon simultaneously, and the response time is short, it is difficult to control. In actual smelting, do just reduction with ferrosilicon, make reducing agent at end with aluminum.
Adopt and have the beneficial effects that produced by technique scheme: during this method converter tapping, increase the tapping quantity of slag, utilize the oxide of vanadium in refine LF stove reduced steel slag, in slag, the oxide of vanadium is reduced to less than 0.03%, molten steel reclaims vanadium 0.008%��0.015%, rephosphorization��0.003%, utilizes vanadium that steel is carried out alloying, reaches the purpose of resource reutilization, disclosure satisfy that smelting process needs, achieve obvious effect.
Detailed description of the invention
Below in conjunction with detailed description of the invention, the present invention is further detailed explanation.
Embodiment 1
Smelting SS400 converter tapping slag thickness 350mm, enter refine LF furnace rear, add Calx 4kg/t steel, fluorite 1.2kg/t steel, add reducing agent 1.8kg/t steel, reducing agent is ferrosilicon powder 0.5kg/t steel, carborundum 0.5kg/t steel, aluminium powder 0.8kg/t steel; CaO/SiO in slag2Being 5, reduce rephosphorization, utilize LF stove electrode concurrent heating 12min simultaneously, temperature is 1590 DEG C, adjusts argon flow amount 1200nL/min, time 3min after heating, increases slag interface reaction, promotes reduction reaction. Reaction detects the oxide of vanadium in slag after terminating be 0.029%, and molten steel vanadium is 0.010%, rephosphorization 0.002%.
Embodiment 2
Smelting SS400 converter tapping slag thickness 400mm, enter refine LF furnace rear, add Calx 4.5kg/t steel, fluorite 1.5kg/t steel, add reducing agent 1.7kg/t steel, reducing agent is carborundum 0.8kg/t steel, aluminium powder 0.9kg/t steel; CaO/SiO in slag2Being 6, reduce rephosphorization, utilize LF stove electrode concurrent heating 13min simultaneously, temperature is 1620 DEG C, adjusts argon flow amount 1300nL/min, time 5min after heating, increases slag interface reaction, promotes reduction reaction. Reaction detects the oxide of vanadium in slag after terminating be 0.027%, and molten steel vanadium is 0.012%, rephosphorization 0.003%.
Embodiment 3
Smelting SS400 converter tapping slag thickness 450mm, enter refine LF furnace rear, add Calx 5.0kg/t steel, fluorite 1.8kg/t steel, add reducing agent 1.8kg/t steel, reducing agent is carborundum 0.9kg/t steel, aluminium powder 0.9kg/t steel; CaO/SiO in slag2Being 8, reduce rephosphorization, utilize LF stove electrode concurrent heating 13min simultaneously, temperature is--1600 DEG C, after heating, adjust argon flow amount 1200nL/min, time 4min, increase slag interface reaction, promote reduction reaction. Reaction detects the oxide of vanadium in slag after terminating be 0.028%, and molten steel vanadium is 0.014%, rephosphorization 0.003%.
Embodiment 4
Smelt SS400 converter tapping slag thickness 200mm, enter refine LF furnace rear, add Calx 3.0kg/t steel, fluorite 1.0kg/t steel, add reducing agent ferrosilicon powder 1kg/t steel; CaO/SiO in slag2Being 7, reduce rephosphorization, utilize LF stove electrode concurrent heating 10min simultaneously, temperature is 1595 DEG C, adjusts argon flow amount 1000nL/min, time 3min after heating, increases slag interface reaction, promotes reduction reaction. Reaction detects the oxide of vanadium in slag after terminating be 0.026%, and molten steel vanadium is 0.013%, rephosphorization 0.003%.
Embodiment 5
Smelting SS400 converter tapping slag thickness 550mm, enter refine LF furnace rear, add Calx 6.0kg/t steel, fluorite 2.0kg/t steel, add reducing agent 3kg/t steel, reducing agent is ferrosilicon powder 1kg/t steel, carborundum 1kg/t steel, aluminium powder 1kg/t steel;CaO/SiO in slag2Being 8, reduce rephosphorization, utilize LF stove electrode concurrent heating 15min simultaneously, temperature is--1615 DEG C, after heating, adjust argon flow amount 1500nL/min, time 5min, increase slag interface reaction, promote reduction reaction. Reaction detects the oxide of vanadium in slag after terminating be 0.024%, and molten steel vanadium is 0.015%, rephosphorization 0.002%.
Claims (8)
1. the Application way of vanadium in a slag, it is characterised in that the slag of converter tapping enters refine LF furnace rear, adds Calx, fluorite, adds the vanadium oxide in reducing agent reducing slag; Utilizing LF stove electrode concurrent heating, adjusting argon flow amount after heating increases slag interface reaction, promotes reduction reaction simultaneously; During converter tapping, thickness of steel slag is 200-500mm.
2. the Application way of vanadium in a kind of slag according to claim 1, it is characterised in that described reducing agent is any one or a few in ferrosilicon powder, carborundum, aluminium powder; Reducing agent addition is ferrosilicon powder 0.5-1.0kg/t steel, carborundum 0.5-1.0kg/t steel, aluminium powder 0.5-1.0kg/t steel.
3. the Application way of vanadium in a kind of slag according to claim 1, it is characterised in that described entrance refine LF furnace rear adds Calx 3-6kg/t steel, fluorite 1-2kg/t steel, makes CaO/SiO in slag2For 5-8, reducing agent addition 0.5-3.0kg/t steel.
4. the Application way of vanadium in a kind of slag according to claim 1, it is characterised in that described should utilize LF stove heated by electrodes concurrent heating, heating-up temperature is 1590-1620 DEG C, and heat time heating time is 10-15min.
5. the Application way of vanadium in a kind of slag according to claim 1, it is characterised in that adjust argon flow amount 1000-1500NL/min, time 3-5min after described heating.
6. the Application way of vanadium in a kind of slag according to claim 1-5 any one, it is characterized in that, described slag amount 350mm, add Calx 4kg/t steel, fluorite 1.2kg/t steel, adds reducing agent 1.8kg/t steel, and reducing agent is ferrosilicon powder 0.5kg/t steel, carborundum 0.5kg/t steel, aluminium powder 0.8kg/t steel; CaO/SiO in slag2Being 5, electrode concurrent heating 12min, temperature is 1590 DEG C, argon flow amount 1200NL/min after heating, time 3min.
7. the Application way of vanadium in a kind of slag according to claim 1-5 any one, it is characterised in that described slag amount 400mm, add Calx 4.5kg/t steel, fluorite 1.5kg/t steel, add reducing agent 1.7kg/t steel, reducing agent is carborundum 0.8kg/t steel, aluminium powder 0.9kg/t steel; CaO/SiO in slag2Being 6, electrode concurrent heating 13min, temperature is 1620 DEG C, argon flow amount 1300NL/min after heating, time 5min.
8. the Application way of vanadium in a kind of slag according to claim 1-5 any one, it is characterised in that described slag amount 450mm, add Calx 5.0kg/t steel, fluorite 1.8kg/t steel, add reducing agent 1.8kg/t steel, reducing agent is carborundum 0.9kg/t steel, aluminium powder 0.9kg/t steel; CaO/SiO in slag2Being 8, electrode concurrent heating 13min, temperature is 1600 DEG C, argon flow amount 1200NL/min after heating, time 4min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510054126.1A CN104611513B (en) | 2015-02-03 | 2015-02-03 | The Application way of vanadium in a kind of slag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510054126.1A CN104611513B (en) | 2015-02-03 | 2015-02-03 | The Application way of vanadium in a kind of slag |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104611513A CN104611513A (en) | 2015-05-13 |
| CN104611513B true CN104611513B (en) | 2016-06-08 |
Family
ID=53146160
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510054126.1A Active CN104611513B (en) | 2015-02-03 | 2015-02-03 | The Application way of vanadium in a kind of slag |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104611513B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106811576B (en) * | 2015-12-02 | 2019-01-04 | 鞍钢股份有限公司 | A kind of hot circulation utilization method of vessel slag |
| CN109457117A (en) * | 2018-11-16 | 2019-03-12 | 河北工程大学 | A kind of method of valuable constituent element comprehensive reutilization in steel slag |
| CN109295316A (en) * | 2018-12-05 | 2019-02-01 | 盐边县向阳钒业有限公司 | The recovery process of vanadium in vanadium containing steel slag |
| CN111057877A (en) * | 2019-12-31 | 2020-04-24 | 永平县勇泰工业废渣有限公司 | Ingredient for refining vanadium from low-grade vanadium waste residue |
| CN112063803A (en) * | 2020-08-05 | 2020-12-11 | 新兴铸管股份有限公司 | Method for reducing vanadium element in slag of refining furnace |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1026501C (en) * | 1991-10-17 | 1994-11-09 | 承德钢铁厂 | Directly alloying process in vanadium slag furnace |
| JP2002235123A (en) * | 2001-02-02 | 2002-08-23 | Nippon Cms Kk | Method for recovering valuable metal from used catalyst |
| CN100469932C (en) * | 2007-06-05 | 2009-03-18 | 钢铁研究总院 | V2O5 direct alloying steelmaking technology |
| CN101798618B (en) * | 2010-03-26 | 2012-03-21 | 河北钢铁股份有限公司承德分公司 | Method for performing vanadium increase and refining in vanadium alloying by utilizing vanadium slag |
| CN103131852B (en) * | 2013-03-06 | 2014-07-02 | 河北钢铁股份有限公司承德分公司 | Method for utilizing sludge containing vanadium and chromium |
-
2015
- 2015-02-03 CN CN201510054126.1A patent/CN104611513B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN104611513A (en) | 2015-05-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104611513B (en) | The Application way of vanadium in a kind of slag | |
| CN101665871B (en) | Method for producing titanium carbide slag | |
| CN103484590B (en) | A kind of v-bearing steel slag smelts the method for the rich vanadium pig iron | |
| RU2739040C1 (en) | Method of producing ferrotungsten based on reduction of self-propagating gradient of aluminothermy and slag refining | |
| CN105624438B (en) | A kind of method using poor manganese slag refining ferromanganese alloy | |
| WO2018228139A1 (en) | Method for preparing ferrovanadium alloy based on aluminum thermal self-propagation gradient reduction and slag washing and refining | |
| CN106086608B (en) | A kind of method that low-carbon manganese-silicon is produced using carbon manganese slag | |
| CN104862441A (en) | Method for separating and recovering iron, vanadium and titanium in vanadium-titanium magnetite | |
| CN103352101A (en) | Low-cost smelting technology of converter | |
| CN105132611B (en) | Method for producing ultra-low phosphorous steel through single slag of converter | |
| CN103695672B (en) | Medium-frequency induction furnace produces the method for ferrochrome | |
| CN102936635B (en) | Method for extracting iron and titanium from ilmenite-containing concentrate | |
| CN104762488B (en) | A kind of method of direct vanadium alloying in esr process | |
| CN104004882A (en) | Method of semisteel silicon increasing processing and method of semisteel converter steelmaking | |
| CN109182886A (en) | Reduce the method that content of vanadium is remained in ferrovanadium slag | |
| CN106591566B (en) | A kind of method that tungsten associated minerals smelt W metallurgy | |
| CN108264224A (en) | A kind of smelting process that slag is smelted into mineral wool material in convertor steelmaking process | |
| CN105063266B (en) | A kind of converter steel making method | |
| CN103088186A (en) | Slag-making method for rapid dephosphorization of semisteel | |
| CN103627846A (en) | Method for performing direct alloying to molybdenum oxide for steelmaking | |
| CN103643056A (en) | Smelting method of low-carbon ferromanganese | |
| CN103468862B (en) | Efficient full-iron steelmaking method allowing molten iron to be added into pig iron in electric-arc furnace | |
| CN103045790B (en) | Containing nickel steel production technology | |
| CN104878199B (en) | A kind of method that microwave is introduced desiliconization method smelting low carbon ferromanganese | |
| CN103643094A (en) | Smelting method of high-carbon ferromanganese |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 067102 A block 520, Luanhe town finance square, Shuangluan District, Chengde, Hebei Patentee after: River steel Limited by Share Ltd Chengde branch Address before: 067102 Luanhe town finance square, Shuangluan District, Chengde, Hebei, Hebei iron and steel Limited by Share Ltd Chengde branch Patentee before: Chengde Branch Co., Ltd. of Hebei Iron & Steel Group |