CN104178639A - Method for extracting vanadium from chrome vanadium slag - Google Patents
Method for extracting vanadium from chrome vanadium slag Download PDFInfo
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- CN104178639A CN104178639A CN201410372810.XA CN201410372810A CN104178639A CN 104178639 A CN104178639 A CN 104178639A CN 201410372810 A CN201410372810 A CN 201410372810A CN 104178639 A CN104178639 A CN 104178639A
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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
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Abstract
The invention discloses a method for extracting vanadium from chrome vanadium slag. The method is characterized by comprising the steps that under the primary roasting condition, the chrome vanadium slag, sulfuric acid solutions and sodium sulfate are primarily roasted, and under the secondary roasting condition, products generated after primary roasting are secondarily roasted; products obtained after secondary roasting are leached; the primary roasting condition comprises the roasting temperature of 100 DEG C to 500 DEG C and the roasting time of 20 minutes to 120 minutes; the secondary roasting condition comprises the roasting temperature of 700 DEG C to 950 DEG C, and the roasting time of 60 minutes to 180 minutes. According to the method, the vanadium can be selectively extracted from the chrome vanadium slag, the operation is easy, few steps exist, and the method is particularly suitable for industrialization production. The leaching rate of the vanadium reaches more than 91 percent by weight.
Description
Technical field
The present invention relates to a kind of method of extracting vanadium from vanadium chromium slag.
Background technology
The method of extracting vanadium from vanadium chromium slag mainly contains sodium-salt calcination and sub-molten salt method, by vanadium and chromium are dissolved in solution simultaneously, then from solution, vanadium is separated with chromium.Yet the technology of isolating respectively vanadium and chromium simultaneously from same solution is comparatively difficult.
CN102329964B disclose a kind of from vanadium chromium reduced waste residue the processing method of Separation and Recovery vanadium and chromium, wherein, the method mainly comprises: (1) washes the water-soluble salt in vanadium chromium reduced waste residue with water, obtain respectively after filtering filter cake (I) and washings, after washings evaporative crystallization, separate out water-soluble salt crystal; (2) filter cake (I) is placed in to basic solution, and adds oxygenant to carry out the Oxidation Leaching of vanadium, the slurry obtaining after leaching obtains filter cake (II) and leach liquor after filtering; (3) filter cake (II) water step (2) being obtained washs, and obtains respectively after filtering containing vanadium washings and filter cake (III); (4) what step (3) is obtained carries out evaporation concentration containing vanadium washings, obtains concentrated solution; (5) concentrated solution that leach liquor step (2) being obtained and step (4) obtain merges, and crystallisation by cooling obtains sodium vanadate crystal; (6) filter cake of step (3) (III) is leached in sulphuric acid soln to extract chromium wherein, obtain liquid-solid mixed slurry; (7) in the slurry obtaining to step (6), add oxygenant be oxidized iron ion wherein and regulate pH value with precipitated impurities, carry out filtering separation, obtain respectively acid leaching solution and finishing slag; (8) acid leaching solution step (7) being obtained carries out evaporative crystallization, and precipitate is basic chromium sulfate.The sodium vanadate product purity that the method makes is more than 93%, Cr in basic chromium sulfate
2o
3content can reach 24%, Fe content and be less than 0.1%, meets in HG/T2678-2007 the requirement for basic chromium sulfate I series products.Yet, the object that the method is processed is vanadium chromium reduced waste residue, and in vanadium chromium reduced waste residue, vanadium exists with oxyhydroxide or the oxide form of tetravalence or three valence states, can under the condition in aforesaid method, be oxidized, yet aforesaid method step is various comparatively complicated, is unfavorable for suitability for industrialized production.
In sum, adopt existing method to extract vanadium from vanadium chromium slag, the defect that exists operational difficulty, step is various and is difficult to realize suitability for industrialized production.
Summary of the invention
The object of the invention is to overcome the existing defect that the operational difficulty, the step that exist in the method for vanadium are various and be difficult to realize suitability for industrialized production of extracting from vanadium chromium slag, provide a kind of simple to operate, step is few, be beneficial to the method for vanadium of extracting from vanadium chromium slag of suitability for industrialized production.
The present inventor finds through deep research, roasting is carried out in two steps, and roasting is carried out under specified conditions of the present invention, can come optionally from vanadium chromium slag, to extract vanadium by controlling roasting, thereby complete the present invention.
To achieve these goals, the invention provides a kind of method of extracting vanadium from vanadium chromium slag, wherein, the method comprises: under the first roasting condition, vanadium chromium slag and sulphuric acid soln and sodium sulfate are carried out to the first roasting, under the second roasting condition, the product after the first roasting is carried out to the second roasting; Then, the product after the second roasting is leached;
Wherein, the condition of described the first roasting comprises: the temperature of roasting is 100-500 ℃, and the time of roasting is 20-120min; The condition of described the second roasting comprises: the temperature of roasting is 700-950 ℃, and the time of roasting is 60-180min.
By adopting method of the present invention, can come optionally from vanadium chromium slag, to extract vanadium by controlling roasting, it is simple to operate, step is few, is particularly suitable for suitability for industrialized production.And, can make more than the leaching yield of vanadium reaches 91 % by weight.
Other features and advantages of the present invention partly in detail are described the embodiment subsequently.
Embodiment
Below the specific embodiment of the present invention is elaborated.Should be understood that, embodiment described herein only, for description and interpretation the present invention, is not limited to the present invention.
The invention provides a kind of method of extracting vanadium from vanadium chromium slag, wherein, the method comprises: under the first roasting condition, vanadium chromium slag and sulphuric acid soln and sodium sulfate are carried out to the first roasting, under the second roasting condition, the product after the first roasting is carried out to the second roasting; Then, the product after the second roasting is leached; Wherein, the condition of described the first roasting comprises: the temperature of roasting is 100-500 ℃, and the time of roasting is 20-120min; The condition of described the second roasting comprises: the temperature of roasting is 700-950 ℃, and the time of roasting is 60-180min.
The method according to this invention goes for extracting vanadium from the various vanadium chromium slag of this area, and for example described vanadium chromium slag can be the vanadium chromium slag containing the blowing of vanadium chromium hot melt.And method of the present invention is applicable to the processing to the vanadium chromium slag of any vanadium and chromium content, under preferable case, in the vanadium chromium slag that method of the present invention is specially adapted to process, the content of v element is 3-15 % by weight, and the content of chromium element is 1-30 % by weight.
According to the present invention, the method comprises: under the first roasting condition, described vanadium chromium slag and described sulphuric acid soln and sodium sulfate are carried out to the first roasting.Wherein, described sulphuric acid soln can by reacting with described vanadium chromium slag, make material shape become hole in the first roasting process, thereby promotes reacting of sodium sulfate and vanadium, and is conducive to the leaching of the product after the second roasting.
In the present invention, there is no particular limitation for the content of the sulfuric acid in described sulphuric acid soln, as long as can reach above-mentioned effect.In common situation, in described sulphuric acid soln, the content of sulfuric acid is more than 70 % by weight, and the content of the sulfuric acid in preferred described sulphuric acid soln is 70-98 % by weight.
In the present invention, preferably, described sulphuric acid soln is aqueous sulfuric acid.
According to the present invention, the consumption of described sulphuric acid soln and sodium sulfate can change in wider scope, and under preferable case, the described vanadium chromium slag of 100 weight parts of take is benchmark, the consumption of described sulphuric acid soln of sulphur acid meter of take is 1-20 weight part, and the consumption of described sodium sulfate is 10-100 weight part.More preferably, the described vanadium chromium slag of 100 weight parts of take is benchmark, and the consumption of described sulphuric acid soln of sulphur acid meter of take is 1-10 weight part, and the consumption of described sodium sulfate is 20-70 weight part.Still more preferably, the described vanadium chromium slag of 100 weight parts of take is benchmark, and the consumption of described sulfuric acid of sulphur acid meter of take is 2.5-8 weight part, and the consumption of described sodium sulfate is 25-50 weight part.At this, " with the consumption of the described sulphuric acid soln of sulphur acid meter " refers to the weight of the sulfuric acid in described sulphuric acid soln.
According to the present invention, described vanadium chromium slag and described sulphuric acid soln and sodium sulfate are carried out to the first roasting and the second roasting successively, wherein, the condition of described the first roasting comprises: the temperature of roasting is 100-500 ℃, the time of roasting is 20-120min; The condition of described the second roasting comprises: the temperature of roasting is 700-950 ℃, and the time of roasting is 60-180min.In the present invention, the temperature of the first roasting is low compared with the temperature of the second roasting, in the first roasting, mainly described vanadium chromium slag is carried out to pre-treatment, makes to form in vanadium chromium slag hole and be tentatively oxidized, can be at higher temperature in the second roasting the abundant vanadium in vanadium oxide chromium slag; And, if the temperature of the first roasting is less than 100 ℃, in the second roasting that makes the water of vanadium chromium slag combination in the pre-treatment of the first roasting not have complete drying will cause carrying out, may there is the problem of materials from bonding under comparatively high temps; If the temperature of the first roasting is greater than 500 ℃, the pretreating effect of vanadium chromium slag is poor.If the temperature of the second roasting is less than 700 ℃, will makes vanadium in vanadium chromium slag to be oxidized fully, thereby cause vanadium extraction weak effect; If the temperature of the second roasting is greater than 950 ℃, will makes at high temperature melting of vanadium in vanadium chromium slag and form the difficult compound leaching, as vanadium bronze etc.
Under preferable case, the condition of described the first roasting comprises: the temperature of roasting is 200-300 ℃, and the time of roasting is 30-60min; The condition of described the second roasting comprises: the temperature of roasting is 700-800 ℃, and the time of roasting is 90-120min.
According to the present invention, after the first roasting finishes, can directly under the second maturing temperature, carry out the second roasting, or material after the first roasting is risen to the second maturing temperature from the first maturing temperature, then carry out the second roasting at the temperature of the second roasting.When material after the first roasting is risen to the second maturing temperature from the first maturing temperature, while carrying out the second roasting again at the temperature of the second roasting, this temperature-rise period is on not impact of actual effect of the present invention, can select any heat-up rate and heating mode to heat up, for example, in 40-100min, from the first maturing temperature, rise to the second maturing temperature.
According to the present invention, the product after described the second roasting is leached, thus the leach liquor of acquisition vanadium.
According to the present invention, described leaching can comprise water logging, alkali soak with acidleach in one or more.Under preferable case, described leaching comprises to be carried out the product after the second roasting after water logging or alkali soaks, then carries out acidleach, from water logging or alkali, soaks and leach liquor, extracts vanadium, and filter residue is being carried out to acidleach.Particularly preferably, described leaching comprises to be carried out the product after the second roasting after water logging, then carries out acidleach.By the product after the second roasting being carried out after water logging or alkali soaks, then the leaching method that carries out acidleach, particularly the product after the second roasting is carried out after water logging, then carry out the leaching method of acidleach, can obtain higher V leaching rate.
Wherein, under preferable case, the condition of described water logging comprises: temperature is 50-100 ℃, and the time is 10-120min.More preferably, the condition of described water logging comprises: temperature is 70-85 ℃, and the time is 30-60min.The water that described water logging is adopted is not particularly limited, as long as can be with the leaching yield Leaching Vanadium of higher vanadium, such as being one or more in deionized water, distilled water, tap water and industrial reuse water etc.The present invention is not particularly limited the weight ratio of material and water in described water logging, the ratio that can adopt this area routine to use when carrying out water logging.But for the consideration that improves V leaching rate and saving water resource, preferably, the weight ratio of the product after water and described the second roasting is 1-5:1, more preferably 1-2:1.
Wherein, under preferable case, the condition that described alkali soaks comprises: pH is more than 11, and temperature is 50-100 ℃, and the time is 10-120min.More preferably, the condition that described alkali soaks comprises: pH is more than 12, and temperature is 70-85 ℃, and the time is 30-60min.The present invention soaks used alkaline solution to described alkali and there is no restriction especially, can select according to concrete roasting material, and preferably, the concentration that described alkali soaks used alkaline solution is 0.1-0.5mol/L.In addition, the present invention does not limit especially to the kind of described alkaline solution, such as thinking one or more in sodium hydroxide solution, potassium hydroxide solution, lithium hydroxide solution etc.The weight ratio that the present invention soaks middle material and water to described alkali is not particularly limited, and can adopt this area routine by the ratio of carrying out using when alkali soaks.But for the consideration that improves V leaching rate and saving water resource, preferably, the weight ratio of the product after alkaline solution and described the second roasting is 1-4:1, more preferably 1-2:1.
Wherein, under preferable case, the condition of described acidleach comprises: pH is below 2, and temperature is 40-80 ℃, and the time is 10-120min.More preferably, the condition of described acidleach comprises: pH is below 1.5, and temperature is 50-55 ℃, and the time is 30-60min.To the concentration of acid solution that described acidleach is used, there is no particular limitation in the present invention, can select according to concrete roasting material, and preferably, the concentration of acid solution that described acidleach is used is 2-30 % by weight, more preferably 5-10 % by weight.In addition, the acid that the present invention adopts described acidleach does not limit especially, for example, can be preferably mineral acid for organic acid, mineral acid, such as one or more in hydrochloric acid, sulfuric acid, nitric acid etc.In the present invention, preferably the product after the second roasting carries out after water logging or alkali soaks, then carries out acidleach (filter residue being about to after water logging or alkali soak carries out acidleach again).For vanadium is leached out better, thereby obtain higher V leaching rate, preferably, the weight ratio of the filter residue after the acid solution that described acidleach adopts and water logging or alkali soak is 1-5:1, is preferably 1.5-3:1.
Although method of the present invention is the method for vanadium of extracting from vanadium chromium slag, and the product after the second roasting is carried out to the leach liquor that described leaching obtains vanadium afterwards, has realized the object of vanadium extraction.But, one skilled in the art will appreciate that in the filter residue after leaching residual most chromium, if necessary, also can from the filter residue this leaching, extract chromium.That is to say, in fact, method of the present invention has also realized carries out separated object by the vanadium in vanadium chromium slag with chromium.
Adopt the method for the present invention can be so that described vanadium chromium slag optionally extracts vanadium, the vanadium chromium slag being about to after roasting leaches, and can optionally only vanadium be leached in leach liquor, wherein, more than V leaching rate can reach 91 % by weight, its separation method is simple, is easy to suitability for industrialized production.
Below will describe the present invention by embodiment.
In following examples and comparative example,
Vanadium chromium slag is the slag charge through containing obtaining after the blowing of vanadium chromium hot melt;
V leaching rate refers to content * 100 % by weight of the vanadium in content/vanadium chromium slag of vanadium in the leach liquor of gained vanadium;
Chromium leaching yield refers to content * 100 % by weight of the chromium in content/vanadium chromium slag of chromium in the leach liquor of gained chromium.
Embodiment 1
The present embodiment is for illustrating the method from vanadium chromium slag Separation and Recovery vanadium and chromium of the present invention.
By 200g vanadium chromium slag, (content of v element is 5.95 % by weight, the content of chromium element is 6.05 % by weight), aqueous sulfuric acid and the 50g sodium sulfate of 98 % by weight of 6g mixes, and at 200 ℃ roasting 30min, then in 50min, be warming up to 800 ℃, and at 800 ℃ roasting 90min; By the water logging 30min (liquid-solid ratio is 2:1) at 70 ℃ of the material after roasting, and filter, the filtrate of acquisition is the leach liquor of vanadium, and wherein, V leaching rate is 74 % by weight, and the leaching yield of chromium is 1.5 % by weight; By gained filter residue (229g), at 50 ℃, in the aqueous sulfuric acid of 5 % by weight, (weight ratio of aqueous sulfuric acid and filter residue is 2:1) carries out acidleach 30min, the filtrate that filtration obtains is the leach liquor of vanadium, wherein, V leaching rate is 22%, and the leaching yield of chromium is 0%.Wherein, total leaching yield of the vanadium of water logging and acidleach is 96%, and total leaching yield of chromium is 1.5%.
Embodiment 2
The present embodiment is for illustrating the method from vanadium chromium slag Separation and Recovery vanadium and chromium of the present invention.
The aqueous sulfuric acid of 70 % by weight of 200g vanadium chromium slag (content of v element is 8 % by weight, and the content of chromium element is 2 % by weight), 8.6g and 140g sodium sulfate are mixed, and at 500 ℃ roasting 30min, then direct roasting 180min at 700 ℃; By the water logging 120min (liquid-solid ratio is 4:1) at 90 ℃ of the material after roasting, and filter, the filtrate of acquisition is the leach liquor of vanadium, and wherein, V leaching rate is 73%, and the leaching yield of chromium is 0.5%; By gained filter residue (225g), at 70 ℃, in the aqueous sulfuric acid of 2 % by weight, (weight ratio of aqueous sulfuric acid and filter residue is 4:1) carries out acidleach 60min, the filtrate that filtration obtains is the leach liquor of vanadium, wherein, V leaching rate is 20%, and the leaching yield of chromium is 0.3%.Wherein, total leaching yield of the vanadium of water logging and acidleach is 93%, and total leaching yield of chromium is 0.8%.
Embodiment 3
The present embodiment is for illustrating the method from vanadium chromium slag Separation and Recovery vanadium and chromium of the present invention.
By 200g vanadium chromium slag, (content of v element is 5.95 % by weight, the content of chromium element is 6.05 % by weight), aqueous sulfuric acid and the 60g sodium sulfate of 80 % by weight of 16g mixes, and at 100 ℃ roasting 30min, then in 60min, be warming up to 950 ℃, and at 950 ℃ roasting 60min; By the water logging 80min (liquid-solid ratio is 1:1) at 50 ℃ of the material after roasting, and filter, the filtrate of acquisition is the leach liquor of vanadium, and wherein, V leaching rate is 71%, and the leaching yield of chromium is 1.6%; By gained filter residue (231g), at 40 ℃, in the aqueous sulfuric acid of 20 % by weight, (weight ratio of aqueous sulfuric acid and filter residue is 1:1) carries out acidleach 20min, the filtrate that filtration obtains is the leach liquor of vanadium, wherein, V leaching rate is 24%, and the leaching yield of chromium is 0.2%.Wherein, total leaching yield of the vanadium of water logging and acidleach is 95%, and total leaching yield of chromium is 1.8%.
Embodiment 4
The present embodiment is for illustrating the method from vanadium chromium slag Separation and Recovery vanadium and chromium of the present invention.
By 200g vanadium chromium slag, (content of v element is 7.5 % by weight, the content of chromium element is 1.75 % by weight), aqueous sulfuric acid and the 100g sodium sulfate of 85 % by weight of 9.4g mixes, and at 300 ℃ roasting 30min, then direct roasting 120min at 850 ℃; By the water logging 40min (liquid-solid ratio is 1.5:1) at 85 ℃ of the material after roasting, and filter, the filtrate of acquisition is the leach liquor of vanadium, and wherein, V leaching rate is 72%, and the leaching yield of chromium is 0.8%; By gained filter residue (230g), at 50 ℃, in the aqueous hydrochloric acid of 8 % by weight, (weight ratio of aqueous hydrochloric acid and filter residue is 2.5:1) carries out acidleach 100min, the filtrate that filtration obtains is the leach liquor of vanadium, wherein, V leaching rate is 19%, and the leaching yield of chromium is 0.35%.Wherein, total leaching yield of the vanadium of water logging and acidleach is 91%, and total leaching yield of chromium is 1.15%.
Embodiment 5
The present embodiment is for illustrating the method from vanadium chromium slag Separation and Recovery vanadium and chromium of the present invention.
According to the method for embodiment 1, difference is, by the material after roasting at 80 ℃, in the aqueous sodium hydroxide solution of 0.2mol/L, carry out alkali and soak 50min (liquid-solid ratio is 2:1), and filter, the filtrate obtaining is the leach liquor of vanadium, wherein, V leaching rate is 70%, and the leaching yield of chromium is 1.6%; Filter residue is carried out to same acidleach, filter the leach liquor that the filtrate obtaining is vanadium, wherein, V leaching rate is 22.5%, and the leaching yield of chromium is 0%.Wherein, it is 92.5% that alkali soaks with total leaching yield of the vanadium of acidleach, and total leaching yield of chromium is 1.6%.
Embodiment 6
The present embodiment is for illustrating the method from vanadium chromium slag Separation and Recovery vanadium and chromium of the present invention.
According to the method for embodiment 1, difference is directly the material after roasting to be carried out to acidleach, the liquid-solid ratio of the aqueous sulfuric acid that the material after its roasting and acidleach adopt is 4:1, filters the leach liquor that the filtrate obtaining is vanadium, wherein, V leaching rate is 85%, and the leaching yield of chromium is 1.5%.
Comparative example 1
According to the method for embodiment 1, difference is, first roasting at 80 ℃, then roasting at 800 ℃.The filtrate obtaining after water logging is the leach liquor of vanadium, and wherein, V leaching rate is 60%, and the leaching yield of chromium is 1.2%; The filtrate obtaining after acidleach is the leach liquor of vanadium, and wherein, V leaching rate is 15%, and the leaching yield of chromium is 0%.Wherein, total leaching yield of the vanadium of water logging and acidleach is 75%, and total leaching yield of chromium is 1.2%.
Comparative example 2
According to the method for embodiment 1, difference is, first roasting at 600 ℃, then roasting at 800 ℃.The filtrate obtaining after water logging is the leach liquor of vanadium, and wherein, V leaching rate is 65%, and the leaching yield of chromium is 1.5%; The filtrate obtaining after acidleach is the leach liquor of vanadium, and wherein, V leaching rate is 18%, and the leaching yield of chromium is 0%.Wherein, total leaching yield of the vanadium of water logging and acidleach is 83%, and total leaching yield of chromium is 1.5%.
More than describe the preferred embodiment of the present invention in detail; but the present invention is not limited to the detail in above-mentioned embodiment, within the scope of technical conceive of the present invention; can carry out multiple simple variant to technical scheme of the present invention, these simple variant all belong to protection scope of the present invention.
It should be noted that in addition, each the concrete technical characterictic described in above-mentioned embodiment, in reconcilable situation, can combine by any suitable mode,
For fear of unnecessary repetition, the present invention is to the explanation no longer separately of various possible array modes.
In addition, between various embodiment of the present invention, also can carry out arbitrary combination, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (10)
1. from vanadium chromium slag, extract a method for vanadium, it is characterized in that, the method comprises: under the first roasting condition, vanadium chromium slag and sulphuric acid soln and sodium sulfate are carried out to the first roasting, under the second roasting condition, the product after the first roasting is carried out to the second roasting; Then, the product after the second roasting is leached;
Wherein, the condition of described the first roasting comprises: the temperature of roasting is 100-500 ℃, and the time of roasting is 20-120min; The condition of described the second roasting comprises: the temperature of roasting is 700-950 ℃, and the time of roasting is 60-180min.
2. method according to claim 1, wherein, the condition of described the first roasting comprises: the temperature of roasting is 200-300 ℃, the time of roasting is 30-60min; The condition of described the second roasting comprises: the temperature of roasting is 700-800 ℃, and the time of roasting is 90-120min.
3. method according to claim 1, wherein, the described vanadium chromium slag of 100 weight parts of take is benchmark, and the consumption of described sulphuric acid soln of sulphur acid meter of take is 1-20 weight part, and the consumption of described sodium sulfate is 10-100 weight part.
4. method according to claim 3, wherein, the described vanadium chromium slag of 100 weight parts of take is benchmark, and the consumption of described sulphuric acid soln of sulphur acid meter of take is 1-10 weight part, and the consumption of described sodium sulfate is 20-70 weight part.
5. according to the method described in any one in claim 1-4, wherein, the content of the sulfuric acid in described sulphuric acid soln is more than 70 % by weight.
6. method according to claim 1, wherein, described leaching comprises to be carried out the product after the second roasting after water logging or alkali soaks, then carries out acidleach.
7. method according to claim 6, wherein, the condition of described water logging comprises: temperature is 50-100 ℃, the time is 10-120min.
8. method according to claim 6, wherein, the condition that described alkali soaks comprises: pH is more than 11, and temperature is 50-100 ℃, and the time is 10-120min.
9. method according to claim 6, wherein, the condition of described acidleach comprises: pH is below 2, and temperature is 40-80 ℃, and the time is 10-120min.
10. according to the method described in any one in claim 1-9, wherein, in described vanadium chromium slag, the content of v element is 3-15 % by weight, and the content of chromium element is 1-30 % by weight.
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Cited By (4)
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| CN104762484A (en) * | 2015-04-03 | 2015-07-08 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for extracting vanadium and chromium from slag containing vanadium and chromium |
| CN106544516A (en) * | 2016-11-25 | 2017-03-29 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of method of Leaching of Vanadium from Vanadium slag |
| CN106544514A (en) * | 2016-11-25 | 2017-03-29 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of method of Leaching of Vanadium from Vanadium slag |
| CN106676255A (en) * | 2016-11-25 | 2017-05-17 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for extracting vanadium from vanadium slag |
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| CN102477491A (en) * | 2010-11-30 | 2012-05-30 | 攀钢集团钢铁钒钛股份有限公司 | Method for extracting vanadium from vanadium slag |
| CN102851507A (en) * | 2012-08-21 | 2013-01-02 | 攀钢集团研究院有限公司 | Vanadium slag sodium modification roasting method |
| CN102912144A (en) * | 2012-09-12 | 2013-02-06 | 北京矿冶研究总院 | Method for leaching vanadium pentoxide from vanadium-containing soot |
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| CN104762484A (en) * | 2015-04-03 | 2015-07-08 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for extracting vanadium and chromium from slag containing vanadium and chromium |
| CN106544516A (en) * | 2016-11-25 | 2017-03-29 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of method of Leaching of Vanadium from Vanadium slag |
| CN106544514A (en) * | 2016-11-25 | 2017-03-29 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of method of Leaching of Vanadium from Vanadium slag |
| CN106676255A (en) * | 2016-11-25 | 2017-05-17 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for extracting vanadium from vanadium slag |
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