CN107502760A - Improve the process of vanadium slag yield - Google Patents
Improve the process of vanadium slag yield Download PDFInfo
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- CN107502760A CN107502760A CN201710692947.7A CN201710692947A CN107502760A CN 107502760 A CN107502760 A CN 107502760A CN 201710692947 A CN201710692947 A CN 201710692947A CN 107502760 A CN107502760 A CN 107502760A
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- vanadium
- clinker
- calcification baking
- calcification
- tailings
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- 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
- C22B34/00—Obtaining refractory metals
- C22B34/20—Obtaining niobium, tantalum or vanadium
- C22B34/22—Obtaining vanadium
-
- 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
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/02—Roasting processes
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- 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
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/04—Extraction of metal compounds from ores or concentrates by wet processes by leaching
- C22B3/06—Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic acid solutions, e.g. with acids generated in situ; in inorganic salt solutions other than ammonium salt solutions
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- 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 process, especially discloses a kind of process for improving vanadium slag yield, belongs to vanadium smelting technology field.V leaching rate can be effectively improved during acidleach by providing one kind, reduce the process of the raising vanadium yield of roasting material sintering rate.Described process improves the vanadium yield of tailings using the circulation calcification baking clinker powder after grinding by secondary leaching vanadium extraction process.
Description
Technical field
The present invention relates to a kind of process, more particularly, to a kind of process for improving vanadium slag yield, belongs to vanadium slag
Smelting process technical field.
Background technology
Peng Yi etc. is in patent《A kind of clean preparation method of vanadium oxide》In disclose calcification baking, sulfuric acid melts leaching, ammonium salt
Precipitation, the cleaning procedure of calcining reduction production vanadium oxide.This production technology has in lab scale, pilot scale and in industrial performance test
Quite prominent advantage.But in the specific production practices of Xichang Gang Fan products company, more new problems are highlighted, especially
It is outstanding problem during calcification baking, the molten leaching of sulfuric acid.Rotary kiln used frequently sinters, and it is endless that clinker used leaches generation leaching
Entirely, leach precipitation phenomenon frequently to occur, cause vanadium yield relatively low, the solution that there is no at present.
The calcification baking that existing above-mentioned production technology uses for once be calcined, once leach production technology.Due to vanadium slag
Particularity, there is higher content of vanadium and impurity content, low melting point is produced in rotary kiln, is turned round when causing once to be calcined
Kiln frequently sinters, and produces rather unstable, precipitation or incomplete is leached after acidleach of the clinker produced, tailings in vanadium extraction is long-term
In high vanadium state, so as to cause calcification baking sulfuric acid leaching process yield relatively low.
The content of the invention
The technical problems to be solved by the invention are：V leaching rate can be effectively improved during acidleach by providing one kind, be dropped
The process of the raising vanadium slag yield of low roasting material sintering rate.
Technical scheme is used by solve above-mentioned technical problem：A kind of process for improving vanadium slag yield, it is special
Sign is：Described process is improved using the circulation calcification baking clinker powder after grinding by secondary leaching vanadium extraction process
The vanadium yield of tailings.
The beneficial effects of the invention are as follows：After the above-mentioned process of the application, due to the leaching raw material used every time
All it is the circulation calcification baking clinker powder that have passed through calcification baking more than twice and be ground into material end, is followed so as to reduce this
The hardness of ring calcification baking clinker powder, stability of the calcification baking clinker in leaching process is improved, is avoided the occurrence of because of calcification
It is calcined unstable caused leach pH of the clinker in leaching process and fluctuates larger situation, precipitation would not also occurs, rise pH
When, leaches incomplete, is lumpd when dropping pH in batch extractor, or even the malignant condition for the clear tank that stops production, and then can greatly improve vanadium
Yield is leached, reduces the labor intensity of worker.Meanwhile except what is used during calcification baking first is fresh raw materials for metallurgy
Outside, due to each time calcification baking use be all at least through a calcification baking or have passed through once leach vanadium extraction after
Tailings add the equal batch mixing of a part of fresh raw materials for metallurgy again, so as to which the hard of the clinker during calcification baking can also be reduced
Degree, the stability for avoiding being calcined the sintering temperature of main equipment such as rotary kiln caused by the appearance of bulky grain sphere are difficult to
The situation of control, reach the purpose for avoiding the occurrence of the serious image of sintering, ring formation in kiln, and then production can be made more smooth, drop
The low incidence for stopping the vicious circle situation such as kiln, cooling, heating, dnockout, hence it is evident that the labor intensity of worker.
It is further that the granularity of the circulation calcification baking clinker powder after grinding is between -80~160 mesh, using portion
It is raw material to divide last time to leach tailings in vanadium extraction and the equal batch mixing of fresh raw materials for metallurgy, and forming circulation calcification by secondary calcification baking roasts
Overburnt material grinds acquisition again.
Such scheme it is preferable that, described fresh raw materials for metallurgy is the calcium that smart vanadium slag and lime stone press 0.3~0.8
Vanadium mixes raw material than what allotment obtained.
It is further that in secondary calcification baking uses the raw material, described last time leaches the weight of tailings in vanadium extraction
Not less than the 85% of batch roasting raw material gross weight.
Such scheme it is preferable that, first batch cycle calcification baking clinker powder be it is obtained in the steps below, will
Fresh raw materials for metallurgy obtains a calcification baking clinker by a calcification baking, grinding, then in a calcification baking clinker
In be proportionally added into that fresh raw materials for metallurgy carries out secondary calcification baking, grinding obtains described secondary cycle calcification baking chamotte powder
End.
It is further that, when carrying out a calcification baking and secondary calcification baking, sintering temperature is 850~870 DEG C,
Roasting time is 3~5h.
Be further, it is secondary leaching vanadium extraction when, the liquid-solid ratio L/S between leachate and solid matter more than 1.0, leaching
Go out pH between 0.5~2.3, extraction temperature is between 20-45 DEG C.
It is further that described circulation calcification baking clinker is the clinker or at least at least through calcification baking
Have passed through once leach vanadium extraction after tailings, then add in proportion fresh raw materials for metallurgy again calcification baking obtain have passed through N
The calcification baking clinker of secondary calcification baking；During each secondary calcification baking, baked calcification baking clinker or leach
Carrying the tailings of vanadium and the proportioning of the fresh raw materials for metallurgy newly added, i.e. recycle ratio is controlled in following ratios,
R1/ W is between 0.45~0.65, R2/ W is between 0.45~0.65, R2/R1Between 0.25~1.50,
Wherein R1For the content of the clinker in a batch,
R2For the content of the tailings in a batch,
W is total weight of the tailings and clinker in a batch.
Brief description of the drawings
Fig. 1 is that the present invention improves the process chart that the process of vanadium slag yield is related to.
Embodiment
In order to solve above-mentioned technical problem present in prior art, one kind provided by the invention can have during acidleach
Effect improves V leaching rate, reduces the process of the raising vanadium slag yield of roasting material sintering rate.Described process is used and ground
Circulation calcification baking clinker powder after mill improves the vanadium yield of tailings by secondary leaching vanadium extraction process.Using the upper of the application
After stating process, because the leaching raw material used every time is all that have passed through calcification baking more than twice and be ground into expect following for end
Ring calcification baking clinker powder, so as to reduce the hardness of the circulation calcification baking clinker powder, improve calcification baking clinker
Stability in leaching process, avoid the occurrence of and pH ripples are leached caused by unstable in leaching process of calcification baking clinker
Precipitation, would not also occur in dynamic larger situation, leach when rising pH not exclusively, lumpd when dropping pH in batch extractor, or even stop production clearly
The malignant condition of tank, and then the leaching yield of vanadium can be greatly improved, reduce the labor intensity of worker.Meanwhile except first
What is used during calcification baking is outside fresh raw materials for metallurgy, due to calcification baking each time use be all at least through
Calcification baking or the tailings that have passed through after once leaching vanadium extraction add the equal batch mixing of a part of fresh raw materials for metallurgy again, so as to
The hardness of the clinker during calcification baking can also be reduced, avoids being calcined main body caused by the appearance of bulky grain sphere
The unmanageable situation of the stability of the sintering temperature of equipment such as rotary kiln, reach and avoid the occurrence of sintering, the serious shape of ring formation in kiln
The purpose of elephant, and then production can be made more smooth, reduce the generation for stopping the vicious circle situation such as kiln, cooling, heating, dnockout
Rate, hence it is evident that the labor intensity of worker.
In above-mentioned embodiment, occur sintering, ring formation image in kiln to reduce to greatest extent during calcification baking,
Meanwhile and can improve Leaching Vanadium yield, after grinding circulation calcification baking clinker powder granularity between -80~160 mesh,
Used part last time to leach tailings in vanadium extraction with the equal batch mixing of fresh raw materials for metallurgy as raw material, and formed and circulate by secondary calcification baking
Calcification baking clinker grinds acquisition again；Now, described fresh raw materials for metallurgy is preferably smart vanadium slag and lime stone by 0.3~0.8
Calcium vanadium than mixed raw material that allotment obtains；And make in secondary calcification baking uses the raw material, the leaching of described last time carries
85% of the weight of vanadium tailing soil not less than batch roasting raw material gross weight.
At the same time, present invention also provides the forming steps of first batch cycle calcification baking clinker powder, i.e., first batch of time
Circulation calcification baking clinker powder is obtained in the steps below, and fresh raw materials for metallurgy is obtained by a calcification baking, grinding
A calcification baking clinker is obtained, then is proportionally added into fresh raw materials for metallurgy in a calcification baking clinker and carries out secondary calcification
Roasting, grinding obtain described secondary cycle calcification baking clinker powder；Now, a calcification baking is either carried out, still
Secondary calcification baking is carried out, its sintering temperature is 850~870 DEG C, and roasting time is 3~5h.
All it is with the leaching vanadium extraction of last time each time in the circulation calcification baking clinker provided according to upper theory, the application
Then tailings adds a part of fresh raw materials for metallurgy and is calcined to produce, then just occur once again as major ingredient
Calcification baking clinker, secondary calcification baking clinker, three times calcification baking clinker, it is ripe will to there is n times calcification baking by that analogy
Material, i.e., circulation calcification baking clinker described herein.Therefore, vanadium extraction yield is leached in order to both improve, meanwhile, roasting is improved again
Conversion ratio, circulation calcification baking clinker described herein be at least through calcification baking clinker or at least through
Once leach vanadium extraction after tailings, then add in proportion fresh raw materials for metallurgy again calcification baking obtain have passed through n times calcification
The calcification baking clinker of roasting；During each secondary calcification baking, baked calcification baking clinker or leach and carried vanadium
Tailings and the proportioning of fresh raw materials for metallurgy newly added, i.e. recycle ratio controlled in following ratios,
R1/ W is between 0.45~0.65, R2/ W is between 0.45~0.65, R2/R1Between 0.25~1.50,
Wherein R1For the content of the clinker in a batch,
R2For the content of the tailings in a batch,
W is total weight of the tailings and clinker in a batch.
Embodiment one
As shown in figure 1, the application using smart vanadium slag and lime stone as raw material, mixes with clinker, tailings carries out calcification baking sulphur
Ore Leaching, the qualified vanadium liquid of clean manufacturing of the continuous circulation technology of clinker, tailings is used to improve vanadium slag roasting conversion rate and yield
Method and step it is as follows：
1st, smart vanadium slag and lime stone are CaO/V according to dispensing calcium vanadium ratio2O5Mixed for 0.3~0.8 and be once calcined, roasted
It is 850~870 DEG C to burn temperature, and the characteristics of once roasting, temperature is difficult that control is arrived in the range of this, and fluctuation is very big, and heat release is rapid, roasting
The burning time is 3~5h, obtains a calcification baking clinker.At this moment clinker conversion ratio is generally very low, below 76%, in pole
Its unstable state；Using this conventional calcification baking extraction vanadium method, calcification baking clinker hardness of gained is larger, typically
It is spherical in bulky grain, also result in it and be calcined main equipment such as rotary kiln because sintering temperature control stability is poor, temperature control difficulty is big,
Sintering, ring formation are serious in kiln, have had a strong impact on the direct motion of production, stop kiln, cooling, heating, the vicious circle of dnockout are constantly showed,
Considerably increase the labor intensity of worker；Such spherical material is to follow-up auxiliary equipment such as disintegrating machine, water-cooling spiral, skin simultaneously
Band, bucket carry, the unobstructed of rod mill etc. causes devastating impact, usually make auxiliary equipment in paralyzed state.
Wherein, the requirement of the smart vanadium slag, the usually mesh of granularity -160, i.e. below 0.120mm ratios are 80% smart vanadium
Slag；The requirement of described lime stone, main component CaCO3, CaO content is about 50~55%.
2nd, a calcification baking clinker contains following two processing methods simultaneously：
(1) by a calcification baking clinker, i.e., by certain grinding, granularity is -80 mesh, i.e. below 0.180mm ratios
For more than 85% smart clinker, it is that L/S is more than 2.5 by certain liquid-solid ratio, once leaches pH 2.3~2.8, once leach
45~55 DEG C of temperature, -1 leaching tailings in vanadium extraction of 1 calcification baking is obtained, is simply named as 1-1 type tailings in vanadium extraction, it is this to carry
Vanadium tailing soil content of vanadium is generally very high, and full content of vanadium is TV more than 2.5%.This is more conventional calcification baking clinker sulfuric acid leaching
Go out method, vanadium yield is relatively low, typically below 65%.And in leaching process, clinker property it is unstable, cause leach pH ripples
It is dynamic larger, occur precipitation, rise pH, leach not exclusively, in drop pH, batch extractor caking, the vicious circle for the clear tank that stops production constantly show,
Considerably increase the labor intensity of worker.
(2) by a calcification baking clinker, i.e., by certain grinding, granularity is -80 mesh, i.e. below 0.180mm ratios
For more than 85% smart clinker, by Circle ratio once1/ W, with fresh feed be smart vanadium slag and lime stone compound according to
Dispensing calcium vanadium ratio (CaO/V2O5) 0.3~0.8 carry out mixing after baking.Sintering temperature is 850~870 DEG C, secondary calcification baking
The characteristics of, temperature is easily controlled in the range of this, and fluctuation is minimum, and heat is dilute by a calcification clinker institute as inert substance
Release, roasting time is 3~5h, obtains secondary calcification baking clinker.At this moment clinker conversion ratio improves a lot, 85% with
On, even up to when reach 92%, in the stable state risen；Use this using a clinker as inert substance, heat absorbing material
Matter, stablize sintering temperature in kiln, improve the calcification baking extraction vanadium method of roasting conversion rate, the secondary calcification baking clinker of gained is hard
Spend it is small, containing a small amount of loose spherolite, mostly powdery.It is calcined main equipment such as rotary kiln because sintering temperature control stability is good, returns
Rotary kiln is in relatively stable state, there is a small amount of ring formation, except it is a small amount of it is planned stop kiln, cooling, heating, dnockout in addition to, greatly
Alleviate the labor intensity of worker；Simultaneously such loose granular material to follow-up auxiliary equipment for example disintegrating machine, water-cooling spiral,
Belt, bucket carry, the load of rod mill etc. and good operation improve good condition.
Circle ratio therein1/ W, R1For the quality of the part clinker of a calcification clinker, W is total fresh material and portion
Sub-prime amount is R1Clinker add up to quality.
The Circle ratio1/ W is selected according to laboratory oven test and live oven test by table 1, Comprehensive Experiment
Room and situ industrial result of the test, select Circle ratio1/ W is advisable for 0.45~0.65, can keep roasting conversion rate 85%
More than.
After once roasting, after baking, gained clinker is clinker three times, so constantly moves in circles, obtains N
Secondary calcification clinker, make in balance of the roasting process constantly in circulation clinker and fresh material.
Here firing cycles compare R1/ W refers to n times calcification clinker (N=1,2,3 ...).
The recycle ratio of table 1 controls R1/ W scopes
3rd, n times calcification clinker will be obtained after n times circulate, by certain grinding, granularity is -80 mesh, i.e. 0.180mm
Following ratio is more than 85% smart clinker, is once leached according to a conventional method by (1) in step 2, obtains n times calcification
- 1 leaching tailings in vanadium extraction of roasting, is simply named as N-1 type tailings in vanadium extraction.This tailings in vanadium extraction content of vanadium is compared with 1-1 type vanadium extractions
The full content of vanadium of tailings is low, and general TV belongs to and more thoroughly leached between 1.5~2.0%, and in leaching process, by
It is relatively stable on pH is leached in the stability of n times calcification clinker, only slight precipitation and have on a small quantity 0.3~0.5% it is sour molten
Vanadium is not leached, is leached to bond in main equipment such as batch extractor and is gathered materials less, and clean-up intensity is small, planned clear tank cycle length.
4th, gained N-1 types tailings in vanadium extraction contains following two processing methods simultaneously：
(1) by gained N-1 type tailings in vanadium extraction, by water removal and certain grinding, granularity is -80 mesh, i.e. below 0.180mm
Ratio is more than 85%, according to secondary leaching method, has difference greatly with a leaching method, i.e., is by certain liquid-solid ratio L/S
More than 1.0, secondary leaching pH 0.5~2.3, secondary 30~45 DEG C of extraction temperature, obtain -2 leaching vanadium extractions of n times calcification baking
Tailings, abbreviation N-2 type tailings in vanadium extraction, this tailings in vanadium extraction content of vanadium is lower compared with a tailings in vanadium extraction vanadium, usually 1.2~
1.5%.
N-2 types tailings in vanadium extraction is constantly moved in circles leaching, obtains N-N type tailings in vanadium extraction, usual content of vanadium 1.0~
1.3%.
(2) by gained N-N type tailings in vanadium extraction, it is -80 mesh that need to equally pass through water removal and certain grinding, granularity, i.e.,
Below 0.180mm ratios are more than 85%, according to the method for (2) in step 2, according to certain Circle ratio2/ W, warp and dispensing
Calcium vanadium ratio (CaO/V2O5) 0.3~0.8 carry out mixing after baking.Sintering temperature and on the time and in recycle ratio with reference to 2 in
(2) method, effect are slightly poorer than clinker circulation roasting, but remain to as inert substance, and absorb heat substance migration, dilution and balance one
Heat caused by secondary fresh material, due to containing CaSO in its tailings4, it is low compared with CaO activity in clinker.What is used in production is excellent
First power is less than clinker.
Specifically, R is worked as2When/W is 1.0, i other words the complete after baking of tailings, roasting conversion rate 16.20%, explanation
The vanadium for also having 16.20% in tailings can be acid-soluble vanadium by roasting conversion rate.
(3) by gained N-N type tailings in vanadium extraction, water removal and certain grinding need to be passed through, granularity is -80 mesh, i.e. 0.180mm with
Lower ratio is more than 85%, the method with n times clinker according to (2) in step 2, according to certain Circle ratio2/R1, in roasting temperature
Degree and the time is upper and recycle ratio on can refer in 2 the method for (2), effect ratio between clinker and tailings alone cycle, but still
Inert substance can be used as, absorb heat substance migration, heat caused by fresh material of dilution and balance, due to containing in its tailings
CaSO4, CaO has larger activity in clinker.The priority used in production is between clinker and tailings.
Tailings and clinker Circle ratio2/R1Selected by table 2.Select Circle ratio2/R1It is advisable for 0.25~1.50.
Specifically, R is worked as2/R1For 0 when, i.e., be not incorporated tailings, a clinker conversion ratio is 82.38%.
The Circle ratio of table 22/R1Control range
| Circle ratio2/R1 | 0 | 0.25 | 0.67 | 1.00 | 1.50 | 4.0 |
| Laboratory roasting conversion rate/% | 82.38 | 89.20 | 89.55 | 88.07 | 88.65 | 86.53 |
Conventionally once it is calcined with tailings by clinker and is once leached, carries out n times roasting according to the new method,
N times leach, and not only roasting conversion rate can bring up to more than 85% from more than 76%, leach tailings in vanadium extraction and dropped from more than 2.5%
It is low to less than 1.3%, calcification baking sulfuric acid leaching vanadium yield brings up to 75%~85% from less than 65%.
Claims (8)
- A kind of 1. process for improving vanadium slag yield, it is characterised in that：Described process is using the circulation calcium after grinding Salt roasting clinker powder improves the vanadium yield of tailings by secondary leaching vanadium extraction process.
- 2. the process according to claim 1 for improving vanadium slag yield, it is characterised in that：Circulation calcification roasting after grinding The granularity of overburnt material powder leached the equal of tailings in vanadium extraction and fresh raw materials for metallurgy between -80~160 mesh, using part last time Batch mixing is raw material, and form circulation calcification baking clinker by secondary calcification baking grinds acquisition again.
- 3. the process according to claim 2 for improving vanadium slag yield, it is characterised in that：Described fresh raw materials for metallurgy For smart vanadium slag and lime stone raw material is mixed by 0.3~0.8 calcium vanadium than what allotment obtained.
- 4. the process according to claim 2 for improving vanadium slag yield, it is characterised in that：Used in secondary calcification baking In the raw material, described last time leaches 85% of weight not less than batch roasting raw material gross weight of tailings in vanadium extraction.
- 5. the process of the raising vanadium slag yield according to claim 1,2,3 or 4, it is characterised in that：First batch cycle Calcification baking clinker powder is obtained in the steps below, and fresh raw materials for metallurgy is obtained into one by a calcification baking, grinding Secondary calcification baking clinker, then be proportionally added into fresh raw materials for metallurgy in a calcification baking clinker and carry out secondary calcification roasting Burn, grinding obtains described secondary cycle calcification baking clinker powder.
- 6. the process according to claim 5 for improving vanadium slag yield, it is characterised in that：Carrying out a calcification baking During with secondary calcification baking, sintering temperature is 850~870 DEG C, and roasting time is 3~5h.
- 7. the process of the raising vanadium slag yield according to claim 1,2,3 or 4, it is characterised in that：Secondary leaching carries During vanadium, the liquid-solid ratio L/S between leachate and solid matter leaches pH between 0.5~2.3, extraction temperature exists more than 1.0 Between 20-45 DEG C.
- 8. the process according to claim 1 for improving vanadium slag yield, it is characterised in that：Described circulation calcification baking Clinker is at least through the clinker of calcification baking or at least through once leaching the tailings after vanadium extraction, then is added in proportion Add the fresh raw materials for metallurgy calcification baking clinker that have passed through n times calcification baking that calcification baking obtains again；Roasted in each secondary calcification During burning, baked calcification baking clinker or leach and proposed the tailings of vanadium and matching somebody with somebody for the fresh raw materials for metallurgy newly added Than, i.e., recycle ratio is controlled in following ratios,R1/ W is between 0.45~0.65, R2/ W is between 0.45~0.65, R2/R1Between 0.25~1.50,Wherein R1For the content of the clinker in a batch,R2For the content of the tailings in a batch,W is total weight of the tailings and clinker in a batch.
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| CN109338095A (en) * | 2018-10-31 | 2019-02-15 | 攀钢集团钒钛资源股份有限公司 | V2O5/TiO2Change the calcification baking technique of vanadium slag |
| CN109355515A (en) * | 2018-11-30 | 2019-02-19 | 攀钢集团研究院有限公司 | The extraction vanadium method of calcification tailings in vanadium extraction |
| CN109355514A (en) * | 2018-11-30 | 2019-02-19 | 攀钢集团研究院有限公司 | Vanadium slag low calcium roasting-counter current acid leaching vanadium extraction method |
| CN111394576A (en) * | 2020-03-30 | 2020-07-10 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for deep leaching of acid leaching vanadium tailings and solution circulation |
| CN111500850A (en) * | 2020-04-21 | 2020-08-07 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for controlling powder adhesion in roasting process of sodium-modified pellets |
| CN111719051A (en) * | 2020-06-29 | 2020-09-29 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for extracting vanadium from vanadium slag by low-calcium roasting and acid leaching |
| CN112111661A (en) * | 2020-09-24 | 2020-12-22 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for extracting vanadium by calcium-manganese composite roasting of vanadium slag |
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| CN109355515A (en) * | 2018-11-30 | 2019-02-19 | 攀钢集团研究院有限公司 | The extraction vanadium method of calcification tailings in vanadium extraction |
| CN109355514A (en) * | 2018-11-30 | 2019-02-19 | 攀钢集团研究院有限公司 | Vanadium slag low calcium roasting-counter current acid leaching vanadium extraction method |
| CN109355514B (en) * | 2018-11-30 | 2020-08-18 | 攀钢集团研究院有限公司 | Method for extracting vanadium from vanadium slag by low-calcium roasting-countercurrent acid leaching |
| CN109355515B (en) * | 2018-11-30 | 2021-03-16 | 攀钢集团研究院有限公司 | Method for extracting vanadium by calcified vanadium extraction tailings |
| CN111394576A (en) * | 2020-03-30 | 2020-07-10 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for deep leaching of acid leaching vanadium tailings and solution circulation |
| CN111500850A (en) * | 2020-04-21 | 2020-08-07 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for controlling powder adhesion in roasting process of sodium-modified pellets |
| CN111719051A (en) * | 2020-06-29 | 2020-09-29 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for extracting vanadium from vanadium slag by low-calcium roasting and acid leaching |
| CN112111661A (en) * | 2020-09-24 | 2020-12-22 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for extracting vanadium by calcium-manganese composite roasting of vanadium slag |
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Effective date of registration: 20180125 Address after: 617000 Panzhihua City, Sichuan Province, panping Pangang Group, the East District of Sichuan Province, vanadium and titanium group Applicant after: PANGANG GROUP STEEL VANADIUM & TITANIUM CO., LTD. Address before: 617067 Panzhihua East District of Sichuan Province, Wapu green Panzhihua Iron and Steel Group vanadium Co., Ltd. Applicant before: Pangang Group Vanadium Industry Co Ltd |
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Application publication date: 20171222 |