CN206721314U - The system for handling converter vanadium chromium slag - Google Patents
The system for handling converter vanadium chromium slag Download PDFInfo
- Publication number
- CN206721314U CN206721314U CN201720339427.3U CN201720339427U CN206721314U CN 206721314 U CN206721314 U CN 206721314U CN 201720339427 U CN201720339427 U CN 201720339427U CN 206721314 U CN206721314 U CN 206721314U
- Authority
- CN
- China
- Prior art keywords
- sodium
- entrance
- chromium slag
- water
- chromium
- 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.)
- Expired - Fee Related
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)
Abstract
The utility model discloses the system of processing converter vanadium chromium slag, including：Direct reduction unit；Separator；First sodium oxide baking device, it has except ferrovanadium chromium slag entrance, the first sodium salt entrance, the first air intake and the outlet of water-soluble sodium vanadate clinker；Water logging vanadium extraction device, it has water-soluble sodium vanadate clinker entrance, the first water inlet, acidity regulator entrance, ammonium salt entrance, vanadic anhydride outlet and the outlet of chromium slag；Second sodium oxide baking device, it has chromium slag entrance, the second sodium salt entrance, second air intake and the outlet of water-soluble sodium chromate chamotte；Flooding chromium device, it has water-soluble sodium chromate chamotte entrance, the second water inlet, sulfuric acid entrance and sodium dichromate outlet.The system can realize the comprehensive reutilization of iron, vanadium and chromium in converter vanadium chromium slag, obtain the iron product, vanadic anhydride and sodium dichromate product of high-quality, and technological process is short, be adapted to industrialization promotion.
Description
Technical field
Metal smelt field is the utility model is related to, specifically, the utility model is related to processing converter vanadium chromium slag is
System.
Background technology
China is a chromium depleted country, and 97% chrome ore all relies on import.It is worth noting that, the red lattice of Panzhihua
Chromium content is up to 9,000,000 tons in the high-chromic vanadium-titanium ferroferrite in area, and content of the chromium with vanadium in raw ore is suitable.The country is to this red
The processing method of lattice vanadium titano-magnetite is first passes around blast furnace process into containing vanadium and chromium molten iron, and then oxidation is blown out and turned in converter
Stove vanadium chromium slag (abbreviation vanadium chromium slag).Converter vanadium chromium slag is vanadium, chromium content is suitable or low vanadium Gao Ge chromium type high vanadium slag, its chromium content
About 5~13%, it is nearly 10 times of common vanadium slag, there is larger application value.Prior art is directly carried out to the vanadium chromium slag
High-temperature oxydation sodium roasting-Soaking treatment, the low high chromium solution of vanadium is obtained, wherein containing impurity such as more silicon, iron, aluminium, phosphorus, after
The purity of continuous precipitation products obtained therefrom is not high, and a small amount of vanadium contained in obtained high chromium solution is difficult to remove, using prior art
Qualified chromium product can not be obtained.
Therefore, the means of existing processing converter vanadium chromium slag still have much room for improvement.
Utility model content
The utility model is intended to one of technical problem at least solving in correlation technique to a certain extent.Therefore, this reality
It is to propose the system for handling converter vanadium chromium slag with a new purpose.It can be realized in converter vanadium chromium slag using the system
The comprehensive reutilization of iron, vanadium and chromium, iron product, vanadic anhydride and the sodium dichromate product of high-quality are obtained respectively,
And technological process is short, it is adapted to industrialization promotion.
In one side of the present utility model, the utility model proposes a kind of system for handling converter vanadium chromium slag.According to
Embodiment of the present utility model, the system include：There is converter vanadium chromium slag to enter for direct reduction unit, the direct reduction unit
Mouth, reduction coal entrance and reduced calcine outlet；Separator, the separator have reduced calcine entrance, iron outlet and removed
Ferrovanadium chromium slag exports, and the reduced calcine entrance is connected with reduced calcine outlet；First sodium oxide baking device, it is described
First sodium oxide baking device, which has, removes ferrovanadium chromium slag entrance, the first sodium salt entrance, the first air intake and water-soluble vanadic acid
Sodium clinker exports, described to be connected except ferrovanadium chromium slag entrance with described except ferrovanadium chromium slag exports；Water logging vanadium extraction device, the flooding
Vanadium device has water-soluble sodium vanadate clinker entrance, the first water inlet, acidity regulator entrance, ammonium salt entrance, vanadic anhydride
Outlet and the outlet of chromium slag, the water-soluble sodium vanadate clinker entrance are connected with the water-soluble sodium vanadate clinker outlet；Second oxygen
Change sodium roasting device, the second sodium oxide baking device has chromium slag entrance, the second sodium salt entrance, second air intake
Exported with water-soluble sodium chromate chamotte, the chromium slag entrance is connected with chromium slag outlet；Flooding chromium device, the flooding
Chromium device has water-soluble sodium chromate chamotte entrance, the second water inlet, sulfuric acid entrance and sodium dichromate outlet, the water soluble chromium
Sour sodium clinker entrance is connected with the water-soluble sodium chromate chamotte outlet.
Thus, according to the system of the processing converter vanadium chromium slag of the utility model embodiment by by converter vanadium chromium slag supply to
Direct-reduction processing is carried out in direct reduction unit, to be reduced iron and vanadium, chromium are not reduced, reduced calcine is obtained, enters
And reduced calcine is supplied into separator and carries out separating treatment, the iron in reduced calcine is separated, obtains iron and except ferrovanadium
Chromium slag；Further, the first sodium oxide molybdena is carried out after being mixed by the first sodium oxide baking device except ferrovanadium chromium slag with sodium salt
Change calcination process, obtain water-soluble sodium vanadate clinker, then water-soluble sodium vanadate clinker is supplied into water logging vanadium extraction device and carried out
Water logging vanadium extraction is handled, and obtains vanadic anhydride product and chromium slag；The second sodium oxide baking device is subsequently used by chromium slag and sodium
The second sodium oxide baking processing is carried out after salt mixing, to obtain water-soluble sodium chromate chamotte, and passes through flooding chromium device
Flooding chromium processing is carried out, obtains sodium dichromate product.Thus, the system of the processing converter vanadium chromium slag of the utility model embodiment
By by iron, vanadium, with chromium step-by-step reduction, first iron product, and further handle except ferrovanadium chromium slag, obtain vanadic anhydride production
Product and sodium dichromate product, so as to realize the comprehensive reutilization of iron, vanadium and chromium in vanadium chromium slag, and technological process is short, fits
Close industrialization promotion.
Optional, the direct reduction unit is rotary hearth furnace or gas-based shaft kiln.
Optional, the first sodium oxide baking device is rotary hearth furnace, rotary kiln or multihearth roaster, preferably rotary kiln
Or multihearth roaster.
Optional, the second sodium oxide baking device is rotary hearth furnace, rotary kiln or multihearth roaster.
Optional, the second sodium oxide baking device is rotary hearth furnace.
Additional aspect and advantage of the present utility model will be set forth in part in the description, partly by from following description
In become obvious, or by it is of the present utility model practice recognize.
Brief description of the drawings
Of the present utility model above-mentioned and/or additional aspect and advantage will in the description from combination accompanying drawings below to embodiment
Become obvious and be readily appreciated that, wherein：
Fig. 1 is the system structure diagram according to the processing converter vanadium chromium slag of the utility model one embodiment；
Fig. 2 is the side using the system processing converter vanadium chromium slag of the processing converter vanadium chromium slag of the utility model one embodiment
Method schematic flow sheet；
Fig. 3 is the system processing converter vanadium chromium slag using the processing converter vanadium chromium slag of the utility model further embodiment
Method flow schematic diagram.
Embodiment
Embodiment of the present utility model is described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning
Same or similar element is represented to same or similar label eventually or there is the element of same or like function.Below by ginseng
The embodiment for examining accompanying drawing description is exemplary, it is intended to for explaining the utility model, and it is not intended that to the utility model
Limitation.
In addition, term " first ", " second " are only used for describing purpose, and it is not intended that instruction or hint relative importance
Or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can be expressed or
Implicitly include at least one this feature.In description of the present utility model, " multiple " are meant that at least two, such as two
It is individual, three etc., unless otherwise specifically defined.
In the utility model, unless otherwise clearly defined and limited, the term such as " connected " should be interpreted broadly, example
Such as, can be fixedly connected or be detachably connected, or integrally；Can be mechanical connection or electrical connection；
Can be joined directly together, can also be indirectly connected by intermediary, can be two element internals connection or two elements
Interaction relationship, limited unless otherwise clear and definite.For the ordinary skill in the art, can be according to specific feelings
Condition understands concrete meaning of the above-mentioned term in the utility model.
Of the present utility model in a first aspect, the utility model proposes a kind of system for handling converter vanadium chromium slag.According to
Embodiment of the present utility model, with reference to figure 1, the system includes：Direct reduction unit 100, separator 200, the first sodium oxide molybdena
Change calciner 300, water logging vanadium extraction device 400, the second sodium oxide baking device 500 and flooding chromium device 600.Wherein,
Direct reduction unit 100 has converter vanadium chromium slag entrance 101, reduction coal entrance 102 and reduced calcine outlet 103；Separator
200 have reduced calcine entrance 201, iron outlet 202 and except ferrovanadium chromium slag outlet 203, reduced calcine entrance 201 and reduced calcine
Outlet 103 is connected；First sodium oxide baking device 300 has except ferrovanadium chromium slag entrance 301, the first sodium salt entrance 302, first
Air intake 303 and water-soluble sodium vanadate clinker outlet 304, except ferrovanadium chromium slag entrance 301 is with removing 203 phases of ferrovanadium chromium slag outlet
Even；Water logging vanadium extraction device 400 has water-soluble sodium vanadate clinker entrance 401, the first water inlet 402, acidity regulator entrance
403rd, ammonium salt entrance 404, vanadic anhydride outlet 405 and chromium slag outlet 406, water-soluble sodium vanadate clinker entrance 401 with it is water-soluble
Property sodium vanadate clinker outlet 304 be connected；Second sodium oxide baking device 500 has chromium slag entrance 501, the second sodium salt entrance
502nd, second air intake 503 and water-soluble sodium chromate chamotte outlet 504, chromium slag entrance 501 are connected with chromium slag outlet 406；Water
Extraction chromium device 600 has water-soluble sodium chromate chamotte entrance 601, the second water inlet 602, sulfuric acid entrance 603 and sodium dichromate
Outlet 604, water-soluble sodium chromate chamotte entrance 601 are connected with water-soluble sodium chromate chamotte outlet 504.
The system of the processing converter vanadium chromium slag according to the utility model embodiment is described in detail below with reference to Fig. 1：
According to embodiment of the present utility model, there is direct reduction unit 100 converter vanadium chromium slag entrance 101, reduction coal to enter
Mouth 102 and reduced calcine outlet 103, direct reduction unit 100 is suitable to converter vanadium chromium slag using reduction coal 1100~1280
Direct-reduction processing is carried out at DEG C, to be reduced iron and vanadium chromium is not reduced, obtains reduced calcine.Specifically, vanadium chromium slag
The mine tailing that to be red lattice vanadium titano-magnetite obtain after blast furnace process and converter oxidation blowing, its main thing mutually for FeO (Cr, V,
Ti)2O3And 2FeOSiO2, vanadium, chromium and part iron mainly in the form of vanadium iron and chromohercynite exist, some iron
Exist in the form of fayalite.
According to embodiment of the present utility model, Cr in converter vanadium chromium slag2O3Mass fraction is that 8~16%, Fe mass fractions are
20~35%, V2O5Mass fraction be 8~16%, there is larger recycling to be worth.According to the active degree of different metal
It is different, it is possible to achieve the step-by-step reduction of different metal.And by the way that converter vanadium chromium slag is carried out directly also at 1100~1280 DEG C
Original place is managed, and can make that iron is reduced and vanadium chromium is not reduced, and obtains reduced calcine, wherein, the reduction to iron compound is mainly wrapped
Include following reaction：
2FeO·SiO2+ 2C+CaO=2Fe+CaO+SiO2+2CO
2FeO·SiO2+ 2CO+CaO=2Fe+CaO+SiO2+2CO2
FeO·(Cr,V,Ti)2O3+ C=(Cr, V, Ti)2O3+Fe+CO
FeO·(Cr,V,Ti)2O3+ CO=(Cr, V, Ti)2O3+Fe+CO2
According to embodiment of the present utility model, direct-reduction processing can be carried out at 1100~1280 DEG C, thus, it is possible to
Further improve the rate of recovery of iron；Meanwhile inventor has found, if the temperature of direct-reduction processing is too high, it will make converter vanadium
Vanadium, chromium and iron in chromium slag are reduced simultaneously, cause vanadium, chromium can not be separated with iron；If the temperature for being reduced directly processing is too low,
The reduction reaction of iron can not be carried out or to enter line efficiency low.
According to a specific embodiment of the present utility model, direct-reduction processing can be coal-based direct reduction processing or gas
Base directly reducing processing.
According to a specific embodiment of the present utility model, direct-reduction handles the degree of metalization of obtained reduced calcine not
Less than 80%, thus, it is possible to significantly improve the rate of recovery of iron.
According to embodiment of the present utility model, the species of direct reduction unit 100 is not particularly restricted, art technology
Personnel can be selected according to being actually needed, and according to specific embodiment of the utility model, direct reduction unit 100 can be
Rotary hearth furnace or gas-based shaft kiln.
According to embodiment of the present utility model, separator 200 has reduced calcine entrance 201, iron outlet 202 and iron removaling
Vanadium chromium slag outlet 203, reduced calcine entrance 201 are connected with reduced calcine outlet 103, and separator 200 is suitable to reduced calcine
Separating treatment is carried out, to obtain iron and except ferrovanadium chromium slag.After testing, the mass fraction of iron is not small in isolated iron product
In 95%, the rate of recovery of iron is not less than 85%, and the mass fraction for removing iron in ferrovanadium chromium slag is not more than 8%.
According to embodiment of the present utility model, the species of separator is not particularly restricted, and those skilled in the art can
It is actually needed and is selected with basis, according to specific embodiment of the utility model, separator can be mill ore magnetic selection device
Or molten separating device.Specifically, when carrying out separating treatment to reduced calcine using mill ore magnetic selection device, iron powder can be directly obtained
Product and except ferrovanadium chromium slag；, can be Celsius 1500~1650 when carrying out separating treatment to reduced calcine using molten separating device
Reduced calcine is carried out in the lower non-reducing atmosphere of degree it is molten divide, obtain molten iron and high-temperature liquid state remove ferrovanadium chromium slag, and then by height
Warm liquid carries out Water Quenching except ferrovanadium chromium slag, you can obtains removing ferrovanadium chromium slag particulate, to carry out follow-up first oxidation sodium
Calcination process.
According to a specific embodiment of the present utility model, contain O in the preferred atmosphere of non-reducing atmosphere2Volumetric concentration
3~25%, it is possible thereby to ensure that metal preferably separates during molten point.
According to embodiment of the present utility model, the first sodium oxide baking device 300 have except ferrovanadium chromium slag entrance 301,
First sodium salt entrance 302, the first air intake 303 and water-soluble sodium vanadate clinker outlet 304, except ferrovanadium chromium slag entrance 301 with
Except ferrovanadium chromium slag outlet 203 is connected, the first sodium oxide baking device 300 will be suitable to after being mixed except ferrovanadium chromium slag with sodium salt in sky
Atmosphere encloses the first sodium oxide baking processing of middle progress, to obtain water-soluble sodium vanadate clinker.Specifically, the first oxidation sodium
Calcination process mainly includes following reaction：
Na2O+V2O3+O2=2NaVO3。
According to a specific embodiment of the present utility model, the processing of the first sodium oxide baking is preferably at 850~950 DEG C
Carry out, thus, it is possible to further improve the rate of recovery of vanadium.
According to embodiment of the present utility model, except the proportioning of ferrovanadium chromium slag and sodium salt is not particularly restricted, this area skill
Art personnel can be selected according to being actually needed, can except ferrovanadium chromium slag and sodium salt according to specific embodiment of the utility model
With according to 100:The mass ratio of (5~15) is mixed, thus, it is possible to the rate of recovery of vanadium further be improved, so as to further carry
The grade of vanadium in the vanadic anhydride product that height obtains.
According to embodiment of the present utility model, the species of the first sodium oxide baking device 300 is not particularly restricted, this
Art personnel can be selected according to being actually needed, according to specific embodiment of the utility model, the first oxidation sodium
Calciner 300 can be rotary hearth furnace, rotary kiln or multihearth roaster, preferably rotary kiln or multihearth roaster, thus, it is possible to enter
One step improves the rate of recovery of vanadium, so as to further improve the grade of vanadium in vanadic anhydride product.
According to embodiment of the present utility model, water logging vanadium extraction device 400 has water-soluble sodium vanadate clinker entrance 401, the
One water inlet 402, acidity regulator entrance 403, ammonium salt entrance 404, vanadic anhydride outlet 405 and chromium slag outlet 406, it is water-soluble
Property sodium vanadate clinker entrance 401 be connected with water-soluble sodium vanadate clinker outlet 304, water logging vanadium extraction device 400 is suitable for by water solubility
Sodium vanadate clinker carries out water logging vanadium extraction processing, to obtain vanadic anhydride and chromium slag.Specifically, water logging vanadium extraction processing is further
Including：
(1) water logging
According to embodiment of the present utility model, by carrying out water logging to water-soluble sodium vanadate clinker, water logging condition is：Leach
80~95 degrees Celsius of temperature, the solid mass ratio of liquid is (3~10):1, extraction time is 3~15min, and water logging terminates rear separation of solid and liquid
Infusion containing vanadium and chromium slag can be obtained.
(2) precipitation
Acid ammonium salt precipitation processing will be carried out again after vanadium infusion purification and impurity removal will be contained, and obtain poly ammonium vanadate precipitation.
Wherein, the key reaction occurred during above-mentioned precipitation is：
Acid adjustment degree：10VO3 -+6H+=H2V10O28 4-+2H2O
Ammonium salt precipitation：3H2V10O28 4-+10NH4 ++2H+=5 (NH4)2V6O16↓+4H2O
(3) calcine
The poly ammonium vanadate precipitation that precipitation handles to obtain is subjected to calcination processing, control calcining heat is under 550 degrees Celsius
React 2h and carry out deamination, to obtain vanadic anhydride product.
Wherein, the key reaction occurred in above-mentioned calcination process is：
(NH4)2V6O16=3V2O5+2NH3↑+H2O。
According to embodiment of the present utility model, the second sodium oxide baking device 500 has chromium slag entrance 501, the second sodium
Salt entrance 502, second air intake 503 and water-soluble sodium chromate chamotte outlet 504, chromium slag entrance 501 exports 406 phases with chromium slag
Even, the second sodium oxide baking device 500 is suitable at 1100~1200 DEG C in air atmosphere enter after chromium slag is mixed with sodium salt
The sodium oxide baking of row second processing, to obtain water-soluble sodium chromate chamotte.Specifically, the master in sodium oxide baking processing
React and be
4Na2O+2Cr2O3+3O2=4Na2CrO4
According to embodiment of the present utility model, the proportioning of chromium slag and sodium salt is not particularly restricted, those skilled in the art
It can be selected according to being actually needed, according to specific embodiment of the utility model, chromium slag and sodium salt can be according to 100:(10
~25) mass ratio is mixed.Thus, it is possible to the rate of recovery of chromium is significantly improved, so as to improve chromium in sodium dichromate product
Grade.
According to embodiment of the present utility model, the species of above-mentioned sodium salt is not particularly restricted, and those skilled in the art can
It is actually needed and is selected with basis, according to specific embodiment of the utility model, sodium salt can be included selected from sodium carbonate, chlorination
At least one of sodium and sodium sulphate.Thus, it is possible to the rate of recovery of chromium is further improved, so as to further improve sodium dichromate production
The grade of chromium in product.
According to embodiment of the present utility model, the species of the second sodium oxide baking device 500 is not particularly restricted, this
Art personnel can be selected according to being actually needed, according to specific embodiment of the utility model, the second oxidation sodium
Calciner 500 can be rotary hearth furnace, rotary kiln or multihearth roaster, preferably rotary hearth furnace, thus, it is possible to further improve chromium
The rate of recovery, so as to further improve the grade of chromium in sodium dichromate product.
According to embodiment of the present utility model, flooding chromium device 600 has water-soluble sodium chromate chamotte entrance 601, the
Two water inlets 602, sulfuric acid entrance 603 and sodium dichromate outlet 604, water-soluble sodium chromate chamotte entrance 601 and water-soluble chromic acid
Sodium clinker outlet 504 is connected, and flooding chromium device 600 is suitable to water-soluble sodium chromate chamotte carrying out flooding chromium processing, so as to
Obtain sodium dichromate.Specifically, flooding chromium processing further comprises：
(a) water logging
According to embodiment of the present utility model, water-soluble sodium chromate chamotte is subjected to water logging, so as to which chromium is transferred into aqueous phase
In, obtain chromium-containing solution.
(b) crystallize
According to embodiment of the present utility model, chromium-containing solution is neutralized successively, sulfuric acid acidifying, evaporation sulfuric acid sodium and
Crystallisation by cooling processing, to obtain sodium dichromate, net reaction is：
2Na2CrO4+H2SO4=Na2Cr2O7+Na2SO4+H2O
Thus, according to the system of the processing converter vanadium chromium slag of the utility model embodiment by by converter vanadium chromium slag supply to
Direct-reduction processing is carried out in direct reduction unit, to be reduced iron and vanadium, chromium are not reduced, reduced calcine is obtained, enters
And reduced calcine is supplied into separator and carries out separating treatment, the iron in reduced calcine is separated, obtains iron and except ferrovanadium
The mass fraction of iron is not less than 85% in chromium slag, wherein iron product；Further, will be removed by the first sodium oxide baking device
Ferrovanadium chromium slag carries out the first sodium oxide baking processing after being mixed with sodium salt, obtain water-soluble sodium vanadate clinker, then by water solubility
Sodium vanadate clinker, which is supplied into water logging vanadium extraction device, carries out water logging vanadium extraction processing, obtains vanadic anhydride product and chromium slag；Subsequently
The second sodium oxide baking processing is carried out after chromium slag is mixed with sodium salt using the second sodium oxide baking device, to obtain water
Dissolubility sodium chromate chamotte, and flooding chromium processing is carried out by flooding chromium device chromium is transferred to aqueous phase, chromium-containing solution is obtained,
And chromium-containing solution is neutralized successively, sulfuric acid acidifying, evaporation sulfuric acid sodium and crystallisation by cooling processing, obtain sodium dichromate production
Product.After testing, the rate of recovery of iron is more than 85%, and the rate of recovery of vanadium is more than 88%, and the rate of recovery of chromium is more than 86%.By
This, the system of the processing converter vanadium chromium slag of the utility model embodiment by by iron, vanadium and chromium step-by-step reduction, first iron production
Product, and further handle except ferrovanadium chromium slag, vanadic anhydride product and sodium dichromate product are obtained, so as to realize in vanadium chromium slag
The comprehensive reutilization of iron, vanadium and chromium, and technological process is short, is adapted to industrialization promotion.
In order to facilitate understanding, it is using the processing converter vanadium chromium slag of the utility model embodiment below with reference to Fig. 2~3 pair
The method of system processing converter vanadium chromium slag is described in detail.According to embodiment of the present utility model, this method includes：
S100：Direct-reduction is handled
In the step, converter vanadium chromium slag is carried out by direct-reduction processing at 1100~1280 DEG C using reduction coal, so as to
It is reduced iron and vanadium chromium is not reduced, obtains reduced calcine.Specifically, vanadium chromium slag is red lattice vanadium titano-magnetite through blast furnace process
With the mine tailing obtained after converter oxidation blowing, its main thing is mutually FeO (Cr, V, Ti)2O3And 2FeOSiO2, vanadium, chromium and portion
Iron is divided mainly to exist in the form of vanadium iron and chromohercynite, some iron exists in the form of fayalite.
According to embodiment of the present utility model, Cr in converter vanadium chromium slag2O3Mass fraction is that 8~16%, Fe mass fractions are
20~35%, V2O5Mass fraction be 8~16%, there is larger recycling to be worth.According to the active degree of different metal
It is different, it is possible to achieve the step-by-step reduction of different metal.And by the way that converter vanadium chromium slag is carried out directly also at 1100~1280 DEG C
Original place is managed, and can make that iron is reduced and vanadium chromium is not reduced, and obtains reduced calcine, wherein, the reduction to iron compound is mainly wrapped
Include following reaction：
2FeO·SiO2+ 2C+CaO=2Fe+CaO+SiO2+2CO
2FeO·SiO2+ 2CO+CaO=2Fe+CaO+SiO2+2CO2
FeO·(Cr,V,Ti)2O3+ C=(Cr, V, Ti)2O3+Fe+CO
FeO·(Cr,V,Ti)2O3+ CO=(Cr, V, Ti)2O3+Fe+CO2
According to embodiment of the present utility model, direct-reduction processing can be carried out at 1100~1280 DEG C, thus, it is possible to
Further improve the rate of recovery of iron；Meanwhile inventor has found, if the temperature of direct-reduction processing is too high, it will make converter vanadium
Vanadium, chromium and iron in chromium slag are reduced simultaneously, cause vanadium, chromium can not be separated with iron；If the temperature for being reduced directly processing is too low,
The reduction reaction of iron can not be carried out or to enter line efficiency low.
According to a specific embodiment of the present utility model, direct-reduction processing can be coal-based direct reduction processing or gas
Base directly reducing processing.
According to a specific embodiment of the present utility model, direct-reduction handles the degree of metalization of obtained reduced calcine not
Less than 80%, thus, it is possible to significantly improve the rate of recovery of iron.
S200：Separating treatment
In the step, reduced calcine is subjected to separating treatment, to obtain iron and except ferrovanadium chromium slag.After testing, separate
To iron product in the mass fraction of iron be not less than 95%, the rate of recovery of iron is not less than 85%, and except the matter of iron in ferrovanadium chromium slag
Measure fraction and be not more than 8%.
According to embodiment of the present utility model, the condition of separating treatment is not particularly restricted, and those skilled in the art can
It is actually needed and is selected with basis, according to specific embodiment of the utility model, separating treatment can be that mill ore magnetic selection is handled
Or molten office reason.Specifically, when carrying out mill ore magnetic selection processing to reduced calcine using mill ore magnetic selection device, can directly obtain
Iron powder product and except ferrovanadium chromium slag；, can be 1500~1650 when carrying out molten office reason to reduced calcine using molten separating device
Molten point is carried out in non-reducing atmosphere under degree Celsius to reduced calcine, molten iron is obtained and high-temperature liquid state removes ferrovanadium chromium slag, and then
By high-temperature liquid state except ferrovanadium chromium slag carries out Water Quenching, you can obtain removing ferrovanadium chromium slag particulate, to carry out follow-up first oxidation
Sodium roasting processing.
According to a specific embodiment of the present utility model, contain O in the preferred atmosphere of non-reducing atmosphere2Volumetric concentration
3~25%, it is possible thereby to ensure that metal preferably separates during molten point.
S300：The processing of first sodium oxide baking
In the step, the first oxidation will be carried out after being mixed except ferrovanadium chromium slag with sodium salt in air atmosphere at 600~900 DEG C
Sodium roasting processing, to obtain water-soluble sodium vanadate clinker.Specifically, the processing of the first sodium oxide baking mainly includes as follows
Reaction：
Na2O+V2O3+O2=2NaVO3。
According to a specific embodiment of the present utility model, the processing of the first sodium oxide baking is preferably at 850~950 DEG C
Carry out, thus, it is possible to further improve the rate of recovery of vanadium.
According to embodiment of the present utility model, except the proportioning of ferrovanadium chromium slag and sodium salt is not particularly restricted, this area skill
Art personnel can be selected according to being actually needed, can except ferrovanadium chromium slag and sodium salt according to specific embodiment of the utility model
With according to 100:The mass ratio of (5~15) is mixed, thus, it is possible to the rate of recovery of vanadium further be improved, so as to further carry
The grade of vanadium in the vanadic anhydride product that height obtains.
S400：Water logging vanadium extraction is handled
In the step, water-soluble sodium vanadate clinker is subjected to water logging vanadium extraction processing, to obtain vanadic anhydride and chromium slag.
Specifically, water logging vanadium extraction processing further comprises：
S410：First water logging
According to embodiment of the present utility model, by carrying out water logging to water-soluble sodium vanadate clinker, water logging condition is：Leach
80~95 degrees Celsius of temperature, the solid mass ratio of liquid is (3~10):1, extraction time is 3~15min, and water logging terminates rear separation of solid and liquid
Infusion containing vanadium and chromium slag can be obtained.
S420：Precipitation
Acid ammonium salt precipitation processing will be carried out again after vanadium infusion purification and impurity removal will be contained, and obtain poly ammonium vanadate precipitation.
Wherein, the key reaction occurred during above-mentioned precipitation is：
Acid adjustment degree：10VO3 -+6H+=H2V10O28 4-+2H2O
Ammonium salt precipitation：3H2V10O28 4-+10NH4 ++2H+=5 (NH4)2V6O16↓+4H2O。
S430：Calcining
The poly ammonium vanadate precipitation that precipitation handles to obtain is subjected to calcination processing, control calcining heat is under 550 degrees Celsius
React 2h and carry out deamination, to obtain vanadic anhydride product.
Wherein, the key reaction occurred in above-mentioned calcination process is：
(NH4)2V6O16=3V2O5+2NH3↑+H2O
S500：The processing of second sodium oxide baking
In the step, the second oxidation sodium is carried out after chromium slag is mixed with sodium salt in air atmosphere at 1100~1200 DEG C
Calcination process, to obtain water-soluble sodium chromate chamotte.Specifically, sodium oxide baking processing in key reaction be
4Na2O+2Cr2O3+3O2=4Na2CrO4
According to embodiment of the present utility model, the proportioning of chromium slag and sodium salt is not particularly restricted, those skilled in the art
It can be selected according to being actually needed, according to specific embodiment of the utility model, chromium slag and sodium salt can be according to 100:(10
~25) mass ratio is mixed.Thus, it is possible to the rate of recovery of chromium is significantly improved, so as to improve chromium in sodium dichromate product
Grade.
According to embodiment of the present utility model, the species of above-mentioned sodium salt is not particularly restricted, and those skilled in the art can
It is actually needed and is selected with basis, according to specific embodiment of the utility model, sodium salt can be included selected from sodium carbonate, chlorination
At least one of sodium and sodium sulphate.Thus, it is possible to the rate of recovery of chromium is further improved, so as to further improve sodium dichromate production
The grade of chromium in product.
S600：The processing of flooding chromium
In the step, water-soluble sodium chromate chamotte is subjected to flooding chromium processing, to obtain sodium dichromate.Specifically,
The processing of flooding chromium further comprises：
S610：Second water logging
According to embodiment of the present utility model, water-soluble sodium chromate chamotte is subjected to water logging, so as to which chromium is transferred into aqueous phase
In, obtain chromium-containing solution.
S620：Crystallization
According to embodiment of the present utility model, chromium-containing solution is neutralized successively, sulfuric acid acidifying, evaporation sulfuric acid sodium and
Crystallisation by cooling processing, to obtain sodium dichromate, net reaction is：
2Na2CrO4+H2SO4=Na2Cr2O7+Na2SO4+H2O
Thus, according to the utility model embodiment processing converter vanadium chromium slag method by by converter vanadium chromium slag 1100
Direct-reduction processing is carried out at~1280 DEG C, to be reduced iron and vanadium, chromium are not reduced, obtains reduced calcine, and then will
Reduced calcine carries out separating treatment, and the iron in reduced calcine is separated, obtains iron and except ferrovanadium chromium slag, iron wherein in iron product
Mass fraction is not less than 85%；Further, is carried out at 600~900 DEG C after being mixed with sodium salt by the way that ferrovanadium chromium slag will be removed
The processing of one sodium oxide baking, water-soluble sodium vanadate clinker is obtained, then water-soluble sodium vanadate clinker is subjected to water logging, by what is obtained
After infusion purification and impurity removal, precipitation is carried out using acid ammonium salt and handles to obtain poly ammonium vanadate precipitation, then ammonium poly-vanadate is precipitated
Precipitation is calcined, to obtain vanadic anhydride product and chromium slag；1100~1200 after subsequently chromium slag is mixed with sodium salt
The second sodium oxide baking processing is carried out at DEG C, to obtain water-soluble sodium chromate chamotte, and is handled by flooding chromium by chromium
Be transferred to aqueous phase, obtain chromium-containing solution, and chromium-containing solution is neutralized successively, sulfuric acid acidifying, evaporation sulfuric acid sodium and cooling
Crystallization treatment, obtain sodium dichromate product.After testing, the rate of recovery of iron is more than 85%, and the rate of recovery of vanadium is more than 88%, chromium
The rate of recovery more than 86%.Thus, the method for the processing converter vanadium chromium slag of the utility model embodiment is by by iron, vanadium and chromium
Step-by-step reduction, iron product is obtained first, and further handled except ferrovanadium chromium slag, obtain vanadic anhydride product and sodium dichromate production
Product, so as to realize the comprehensive reutilization of iron, vanadium and chromium in vanadium chromium slag, and technological process is short, is adapted to industrialization promotion.
Below with reference to specific embodiment, the utility model is described, it is necessary to which explanation is, these embodiments are only
Descriptive, without limiting the utility model in any way.
Embodiment 1
By the country certain company converter vanadium chromium slag (Cr2O3Mass fraction is 8%, V2O5Mass fraction is 8%, Fe mass fractions
For 20%) 1100 DEG C of progress coal-based direct reduction processing in rotary hearth furnace, reduced calcine, ferrous metal rate 80% are obtained.Will be also
Original roasting progress mill ore magnetic selection, which handles to obtain, removes ferrovanadium chromium slag (Fe mass fractions 7.9%) and iron powder (Fe mass fractions 88%),
Iron powder can be as the quality raw materials of steel-making.Ferrovanadium chromium slag and sodium salt in mass ratio 100 will be removed:After 5 mixing 600 in rotary kiln
DEG C sodium oxide baking 1h obtains water-soluble sodium vanadate clinker, and the progress water logging vanadium extraction of water-soluble sodium vanadate clinker is handled to obtain five
V 2 O and chromium slag.By chromium slag and sodium salt in mass ratio 100:10 mixing after in rotary hearth furnace 1100 DEG C of sodium oxide baking 1h
Water-soluble sodium chromate chamotte is obtained, water-soluble sodium chromate chamotte progress flooding chromium is handled to obtain sodium dichromate.Whole technique
Iron recovery 87%, vanadium recovery 90%, chromium recovery ratio 88%.
Embodiment 2
By the country certain company converter vanadium chromium slag (Cr2O3Mass fraction is 10%, V2O5Mass fraction is 10%, Fe mass point
Number is 24%) 1150 DEG C of progress gas base directly reducing processing in gas-based shaft kiln, obtains reduced calcine, ferrous metal rate 83%.
Reduction roasting progress mill ore magnetic selection is handled to obtain and removes ferrovanadium chromium slag (Fe mass fractions 7.5%) and iron powder (Fe mass fractions
89%), iron powder can be as the quality raw materials of steel-making.Ferrovanadium chromium slag and sodium salt in mass ratio 100 will be removed:Turned round after 10 mixing
700 DEG C of sodium oxide baking 1.5h obtain water-soluble sodium vanadate clinker in kiln, and water-soluble sodium vanadate clinker is carried out into water logging vanadium extraction
Processing obtains vanadic anhydride and chromium slag.By chromium slag and sodium salt in mass ratio 100:1150 DEG C of oxidations in rotary hearth furnace after 15 mixing
Sodium roasting 1.5h obtains water-soluble sodium chromate chamotte, and water-soluble sodium chromate chamotte progress flooding chromium is handled to obtain dichromic acid
Sodium.Whole technique iron recovery 89%, vanadium recovery 92%, chromium recovery ratio 89%.
Embodiment 3
By the country certain company converter vanadium chromium slag (Cr2O3Mass fraction is 12%, V2O5Mass fraction is 12%, Fe mass point
Number is 30%) 1200 DEG C of progress coal-based direct reduction processing in rotary hearth furnace, obtains reduced calcine, ferrous metal rate 85%.Will
Reduction roasting progress mill ore magnetic selection, which handles to obtain, removes ferrovanadium chromium slag (Fe mass fractions 6.9%) and iron powder (Fe mass fractions
91%), iron powder can be as the quality raw materials of steel-making.Ferrovanadium chromium slag and sodium salt in mass ratio 100 will be removed:In multilayer after 12 mixing
800 DEG C of sodium oxide baking 2h obtain water-soluble sodium vanadate clinker in roaster, and water-soluble sodium vanadate clinker is carried out into flooding
Vanadium handles to obtain vanadic anhydride and chromium slag.By chromium slag and sodium salt in mass ratio 100:20 mixing after in rotary hearth furnace 1175 DEG C of oxygen
Change sodium roasting 2h and obtain water-soluble sodium chromate chamotte, water-soluble sodium chromate chamotte progress flooding chromium is handled to obtain dichromic acid
Sodium.Whole technique iron recovery 90%, vanadium recovery 94%, chromium recovery ratio 90%.
Embodiment 4
By the country certain company converter vanadium chromium slag (Cr2O3Mass fraction is 16%, V2O5Mass fraction is 16%, Fe mass point
Number is 35%) 1280 DEG C of progress gas base directly reducing processing in gas-based shaft kiln, obtains reduced calcine, ferrous metal rate 87%.
Reduction roasting progress mill ore magnetic selection is handled to obtain and removes ferrovanadium chromium slag (Fe mass fractions 6.5%) and iron powder (Fe mass fractions
93%), iron powder can be as the quality raw materials of steel-making.Ferrovanadium chromium slag and sodium salt in mass ratio 100 will be removed:In multilayer after 15 mixing
900 DEG C of sodium oxide baking 1.5h obtain water-soluble sodium vanadate clinker in roaster, and water-soluble sodium vanadate clinker is carried out into water logging
Vanadium extraction handles to obtain vanadic anhydride and chromium slag.By chromium slag and sodium salt in mass ratio 100:After 25 mixing 1200 DEG C in rotary hearth furnace
Sodium oxide baking 2h obtains water-soluble sodium chromate chamotte, and water-soluble sodium chromate chamotte progress flooding chromium is handled to obtain weight chromium
Sour sodium.Whole technique iron recovery 88%, vanadium recovery 95%, chromium recovery ratio 92%.
Embodiment 5
By the country certain company converter vanadium chromium slag (Cr2O3Mass fraction is 8%, V2O5Mass fraction is 8%, Fe mass fractions
For 20%) 1100 DEG C of progress coal-based direct reduction processing in rotary hearth furnace, reduced calcine, ferrous metal rate 80% are obtained.Will be also
Original roasting combustion gas it is molten divide in stove carry out molten office under 1500 DEG C of non-reducing atmospheres and manage to obtain high-temperature liquid state to remove ferrovanadium chromium slag (Fe matter
Measure fraction 5.9%) and molten iron (Fe mass fractions 95.5%), molten iron can be as the quality raw materials made steel.High-temperature liquid state is removed
Ferrovanadium chromium slag carries out Water Quenching, obtains granularity and removes ferrovanadium chromium slag particulate less than 3mm.It will be pressed except ferrovanadium chromium slag particulate with sodium salt
Mass ratio 100:600 DEG C of sodium oxide baking 1h obtain water-soluble sodium vanadate clinker in rotary kiln after 5 mixing, by water-soluble vanadium
Sour sodium clinker carries out water logging vanadium extraction and handles to obtain poly ammonium vanadate and chromium slag.By chromium slag and sodium salt in mass ratio 100:After 10 mixing
1100 DEG C of sodium oxide baking 1h obtain water-soluble sodium chromate chamotte in rotary hearth furnace, and water-soluble sodium chromate chamotte is carried out into water logging
Chromium is carried to handle to obtain sodium dichromate.Whole technique iron recovery 87%, vanadium recovery 90%, chromium recovery ratio 88%.
Embodiment 6
By the country certain company converter vanadium chromium slag (Cr2O3Mass fraction is 10%, V2O5Mass fraction is 10%, Fe mass point
Number is 24%) 1150 DEG C of progress gas base directly reducing processing in gas-based shaft kiln, obtains reduced calcine, ferrous metal rate 83%.
By reduction roasting combustion gas it is molten divide in stove carry out molten office under 1550 DEG C of non-reducing atmospheres and manage to obtain high-temperature liquid state to remove ferrovanadium chromium slag
(Fe mass fractions 5.7%) and molten iron (Fe mass fractions 96%), molten iron can be as the quality raw materials of steel-making.By high-temperature liquid state
Except ferrovanadium chromium slag carries out Water Quenching, obtain granularity and remove ferrovanadium chromium slag particulate less than 3mm.Ferrovanadium chromium slag will be removed and press matter with sodium salt
Measure ratio 100:700 DEG C of sodium oxide baking 1.5h obtain water-soluble sodium vanadate clinker in rotary kiln after 10 mixing, by water solubility
Sodium vanadate clinker carries out water logging vanadium extraction and handles to obtain poly ammonium vanadate and chromium slag.By chromium slag and sodium salt in mass ratio 100:15 mixing
1150 DEG C of sodium oxide baking 1.5h obtain water-soluble sodium chromate chamotte in rotary hearth furnace afterwards, and water-soluble sodium chromate chamotte is carried out
Flooding chromium handles to obtain sodium dichromate.Whole technique iron recovery 89%, vanadium recovery 92%, chromium recovery ratio 89%.
Embodiment 7
By the country certain company converter vanadium chromium slag (Cr2O3Mass fraction is 12%, V2O5Mass fraction is 12%, Fe mass point
Number is 30%) 1200 DEG C of progress coal-based direct reduction processing in rotary hearth furnace, obtains reduced calcine, ferrous metal rate 85%.Will
Reduction roasting combustion gas it is molten divide in stove carry out molten office under 1600 DEG C of non-reducing atmospheres and manage to obtain high-temperature liquid state to remove ferrovanadium chromium slag (Fe
Mass fraction 5.3%) and molten iron (Fe mass fractions 96.8%), molten iron can be as the quality raw materials of steel-making.By high-temperature liquid state
Except ferrovanadium chromium slag carries out Water Quenching, obtain granularity and remove ferrovanadium chromium slag particulate less than 3mm.Ferrovanadium chromium slag particulate and sodium salt will be removed
In mass ratio 100:800 DEG C of sodium oxide baking 2h obtain water-soluble sodium vanadate clinker in multihearth roaster after 12 mixing, will
Water-soluble sodium vanadate clinker carries out water logging vanadium extraction and handles to obtain poly ammonium vanadate and chromium slag.By chromium slag and sodium salt in mass ratio 100:
1175 DEG C of sodium oxide baking 2h obtain water-soluble sodium chromate chamotte in rotary hearth furnace after 20 mixing, by water-soluble sodium chromate chamotte
Flooding chromium is carried out to handle to obtain sodium dichromate.Whole technique iron recovery 90%, vanadium recovery 94%, chromium recovery ratio 90%.
Embodiment 8
By the country certain company converter vanadium chromium slag (Cr2O3Mass fraction is 16%, V2O5Mass fraction is 16%, Fe mass point
Number is 35%) 1280 DEG C of progress gas base directly reducing processing in gas-based shaft kiln, obtains reduced calcine, ferrous metal rate 87%.
By reduction roasting combustion gas it is molten divide in stove carry out molten office under 1650 DEG C of non-reducing atmospheres and manage to obtain high-temperature liquid state to remove ferrovanadium chromium slag
(Fe mass fractions 4.9%) and molten iron (Fe mass fractions 97.5%), molten iron can be as the quality raw materials of steel-making.By high-temperature liquid
State carries out Water Quenching except ferrovanadium chromium slag, obtains granularity and removes ferrovanadium chromium slag particulate less than 3mm.Ferrovanadium chromium slag particulate and sodium will be removed
Salt in mass ratio 100:To obtain water-soluble sodium vanadate ripe by 900 DEG C of sodium oxide baking 1.5h in multihearth roaster after 15 mixing
Material, the progress water logging vanadium extraction of water-soluble sodium vanadate clinker is handled to obtain poly ammonium vanadate and chromium slag.Chromium slag and sodium salt are pressed into quality
Than 100:1200 DEG C of sodium oxide baking 2h obtain water-soluble sodium chromate chamotte in rotary hearth furnace after 25 mixing, by water-soluble chromic acid
Sodium clinker carries out flooding chromium and handles to obtain sodium dichromate.Whole technique iron recovery 88%, vanadium recovery 95%, chromium recovery ratio
92%.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or the spy for combining the embodiment or example description
Point is contained at least one embodiment or example of the present utility model.In this manual, to the schematic table of above-mentioned term
State and be necessarily directed to identical embodiment or example.Moreover, specific features, structure, material or the feature of description can be with
Combined in an appropriate manner in any one or more embodiments or example.In addition, in the case of not conflicting, this area
Technical staff the different embodiments or example and the feature of different embodiments or example described in this specification can be entered
Row combines and combination.
Although embodiment of the present utility model has been shown and described above, it is to be understood that above-described embodiment is
Exemplary, it is impossible to it is interpreted as to limitation of the present utility model, one of ordinary skill in the art is in the scope of the utility model
It is interior above-described embodiment to be changed, changed, replaced and modification.
Claims (5)
- A kind of 1. system for handling converter vanadium chromium slag, it is characterised in that including：Direct reduction unit, the direct reduction unit have converter vanadium chromium slag entrance, reduction coal entrance and reduced calcine outlet；Separator, the separator have reduced calcine entrance, iron outlet and except ferrovanadium chromium slag export, the reduced calcine Entrance is connected with reduced calcine outlet；First sodium oxide baking device, the first sodium oxide baking device have except ferrovanadium chromium slag entrance, the first sodium salt Entrance, the first air intake and the outlet of water-soluble sodium vanadate clinker, it is described to remove ferrovanadium chromium slag entrance with described except ferrovanadium chromium slag goes out Mouth is connected；Water logging vanadium extraction device, the water logging vanadium extraction device have water-soluble sodium vanadate clinker entrance, the first water inlet, acidity adjustment Agent entrance, ammonium salt entrance, vanadic anhydride outlet and the outlet of chromium slag, the water-soluble sodium vanadate clinker entrance and the water solubility The outlet of sodium vanadate clinker is connected；Second sodium oxide baking device, the second sodium oxide baking device have chromium slag entrance, the second sodium salt entrance, Two air intakes and the outlet of water-soluble sodium chromate chamotte, the chromium slag entrance are connected with chromium slag outlet；Flooding chromium device, the flooding chromium device have water-soluble sodium chromate chamotte entrance, the second water inlet, sulfuric acid entrance Exported with sodium dichromate, the water-soluble sodium chromate chamotte entrance is connected with the water-soluble sodium chromate chamotte outlet.
- 2. according to the system of the processing converter vanadium chromium slag described in claim 1, it is characterised in that the direct reduction unit is Rotary hearth furnace or gas-based shaft kiln.
- 3. according to the system for handling converter vanadium chromium slag described in claim 1, it is characterised in that the first oxidation sodium roasting Burning device is rotary hearth furnace, rotary kiln or multihearth roaster.
- 4. according to the system for handling converter vanadium chromium slag described in claim 1, it is characterised in that the second oxidation sodium roasting Burning device is rotary hearth furnace, rotary kiln or multihearth roaster.
- 5. according to the system for handling converter vanadium chromium slag described in claim 4, it is characterised in that the second oxidation sodium roasting Burning device is rotary hearth furnace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720339427.3U CN206721314U (en) | 2017-03-31 | 2017-03-31 | The system for handling converter vanadium chromium slag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720339427.3U CN206721314U (en) | 2017-03-31 | 2017-03-31 | The system for handling converter vanadium chromium slag |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206721314U true CN206721314U (en) | 2017-12-08 |
Family
ID=60503948
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720339427.3U Expired - Fee Related CN206721314U (en) | 2017-03-31 | 2017-03-31 | The system for handling converter vanadium chromium slag |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206721314U (en) |
-
2017
- 2017-03-31 CN CN201720339427.3U patent/CN206721314U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102703688B (en) | The method of vanadium is reclaimed in vanadium titano-magnetite | |
| CN104109758A (en) | Clean process method for extracting vanadium, chromium and iron from vanadium slag step by step | |
| CN106086469A (en) | A kind of method and system utilizing lateritic nickel ore to extract nickel oxide | |
| CN105969978B (en) | The system and method for preparing ferrochrome | |
| CN109055724A (en) | The method of vanadium and chromium is extracted from chrome alum mine/slag | |
| CN106756120A (en) | Process the method and system of vanadium-bearing slag of high calcium and high phosphor | |
| CN106978544A (en) | The system and method for handling converter vanadium chromium slag | |
| CN106834724A (en) | Process the method and system of vanadium chromium slag | |
| CN206721314U (en) | The system for handling converter vanadium chromium slag | |
| CN206721316U (en) | The system for handling converter vanadium chromium slag | |
| CN106978543A (en) | The system and method for handling converter vanadium chromium slag | |
| CN106978540A (en) | Handle the method and system of vanadium-bearing slag of high calcium and high phosphor | |
| CN206721334U (en) | The system of vanadium-bearing slag of high calcium and high phosphor dephosphorization vanadium extraction | |
| CN206721333U (en) | The system of vanadium-bearing slag of high calcium and high phosphor dephosphorization vanadium extraction | |
| CN109576507A (en) | A kind of continuous technique for separating antimony gold in antimony gold concentrate | |
| CN106978542A (en) | The system and method for handling converter vanadium chromium slag | |
| CN206721315U (en) | The system for handling vanadium chromium slag | |
| CN106834727A (en) | The system and method for processing converter vanadium chromium slag | |
| CN205990444U (en) | Vanadium slag is carried out with the system of integrated treatment | |
| CN206721320U (en) | The system for handling vanadium chromium slag | |
| CN206721325U (en) | The system for handling converter vanadium chromium slag | |
| CN206721308U (en) | The system for handling vanadium-bearing slag of high calcium and high phosphor | |
| CN106756071A (en) | The system and method for processing converter vanadium chromium slag | |
| CN206721332U (en) | The system of vanadium-bearing slag of high calcium and high phosphor dephosphorization vanadium extraction | |
| CN106978541A (en) | The system and method for handling converter vanadium chromium slag |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PP01 | Preservation of patent right | ||
| PP01 | Preservation of patent right |
Effective date of registration: 20190102 Granted publication date: 20171208 |
|
| PD01 | Discharge of preservation of patent | ||
| PD01 | Discharge of preservation of patent |
Date of cancellation: 20220102 Granted publication date: 20171208 |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171208 Termination date: 20190331 |