CN106756117A - A kind of method that Rock coal containing alum and v-bearing steel slag combine vanadium enrichment - Google Patents
A kind of method that Rock coal containing alum and v-bearing steel slag combine vanadium enrichment Download PDFInfo
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- CN106756117A CN106756117A CN201611150370.9A CN201611150370A CN106756117A CN 106756117 A CN106756117 A CN 106756117A CN 201611150370 A CN201611150370 A CN 201611150370A CN 106756117 A CN106756117 A CN 106756117A
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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
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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
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/001—Dry 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
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/04—Working-up slag
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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 method that Rock coal containing alum and v-bearing steel slag combine vanadium enrichment, belong to vanadium recovery technology field.The present invention mixes Rock coal containing alum with v-bearing steel slag, makes CaO%/(SiO in mixture2%+Al2O3%) between 0.8~1.4,15~25 minutes are incubated after heating the mixture to 1450~1500 DEG C, then room temperature is cooled to after being cooled to 1200~1250 DEG C with 5~10 DEG C/min, rich vanadium is generated in temperature-fall period, vanadium solid solution phase (Fe predominantly high, Mg) O (V, Al, Fe)2O3, content of vanadium is with V in the ore deposit phase2O5Meter is not less than 20%, and enrichment of the bone coal with vanadium in slag in the phase does not contain p and ses in being more than 80%, and rich vanadium phase.The present invention is using low-grade containing vanadium mineral and the Combined Treatment of solid waste containing vanadium, using the complementary characteristic of two kinds of low-grade chemical compositions containing vanadium resource, while the vanadium in two spike-type cultivars is extracted, and gained richness vanadium phase vanadium grade is high, it is easily isolated, is adapted to the recovery of vanadium in low grade vanadium resource.
Description
Technical field
The invention belongs to vanadium recovery technology field, more specifically to a kind of Rock coal containing alum and v-bearing steel slag joint vanadium
The method of enrichment.
Background technology
Rock coal containing alum is a kind of important containing vanadium mineral, and china natural resources reserves enrich very much, in Sichuan, Shaanxi, Hunan, peace
The ground such as emblem, Hubei have widely distributed, and the total vanadium amount in Rock coal containing alum is up to 1.18 × 108T, accounts for China V2O5The 87% of gross reserves.Together
When, domestic and international some iron and steel enterprises such as hold steel, climb steel, and using low vanadium-containing molten iron direct steelmaking, vanadium enters slag in converting process
Phase, forms v-bearing steel slag.China has added up this slag of up to ten million tons, and also is increased with annual millions of tons speed.
Vanadium is a kind of important raw material of industry, is widely used in chemical industry, metallurgy, material and automobile and other industries, therefore recovery contains
Vanadium steel slag and Rock coal containing alum etc. just have preferable economic benefit containing the vanadium in vanadium resource.Additionally, the low vanadium resource of above two is all
Contain high-valence state vanadium：V4+And V5+, if do not dealt carefully with, can be leached by rainwater, heavy metal pollution is formed, so as to influence ecological ring
Border and human health.Therefore, the vanadium reclaimed in slag and bone coal also has important environment protection significance simultaneously.
At present, the recovery containing vanadium in vanadium resource typically need to first produce vanadic anhydride, then recycle vanadic anhydride system
Take other products.For industrial point of view, producing for vanadic anhydride there are certain requirements to raw material vanadium grade, with V2O5Meter content
12% should be not less than.And in v-bearing steel slag and Rock coal containing alum the grade of vanadium far below the numerical value, (v-bearing steel slag contains 1~5%
V2O5, Rock coal containing alum is containing 0.3~1.5%V2O5).Therefore, the grade of vanadium in the low vanadium resource of above two need to be just improved, product are improved
Position customary way is Mineral separation.During vanadium in Mineral separation requirement raw material concentrates on one or two mineral (namely containing navajoite
Phase), and the vanadium grade of phase containing vanadium is sufficiently high.However, the vanadium in above two resource is in Dispersed precipitate, the experimental results table
It is bright：Rock coal containing alum is not obvious with the ore dressing effect of vanadium in vanadium containing steel slag, so as to need that above two is contained into vanadium before ore dressing
During scattered vanadium focuses on one or two mineral in resource.
For v-bearing steel slag, there is a kind of selective enrichment method at present, i.e., under oxidative conditions, by the most of vanadium in slag
+ 5 valencys are oxidized to, and create suitable physical and chemical condition, form it into the precipitation of vanadium calcium phosphate solid solution phase.Current vanadium oxidation is rich
Collection research has obtained initial success, and such as Chinese Patent Application No. 200510094963 discloses a kind of enrichment of vanadium in vanadium containing steel slag
Method, one or more following additives that this application case passes through the addition quantity of slag 5-16% in v-bearing steel slag：SiO2、Al2O3、
Mullite (3SiO2·2Al2O3), and aerial oxygen position or higher than aerial oxygen position under the conditions of melt processed, then cool down, insulation after
V-bearing steel slag is taken out and quenching in atmosphere, so that the vanadium more than 80% of Dispersed precipitate is transferred to a richness in v-bearing steel slag
Precipitation is enriched with and crystallized in cenotype containing vanadium obtains high-grade rich vanadium phase.This application case is under oxidative conditions by vanadium in slag
Major part is oxidized to pentavalent and forms rich vanadium phase-vanadium calcium phosphate solid solution phase with phosphorus pentoxide, calcium oxide.But due to using upper
State selective enrichment method acquisition rich vanadium phase physical property it is more close with other mineral in slag, so as to cause rich vanadium phase and its
Its ore deposit is mutually difficult to separate, and this is also into the bottleneck problem for hindering to recycle the vanadium in low-grade v-bearing steel slag.
For Rock coal containing alum, the vanadium in Rock coal containing alum is reclaimed using wet underwater welding generally in the prior art, specifically
Ground V is extracted by sodium roasting → leaching → precipitation → calcination operation2O5, but due to can be produced during sodium roasting
Substantial amounts of HCl, Cl2、SO2Deng gas, so that serious pollution can be caused to environment, and using existing method in Rock coal containing alum
Vanadium vanadium when being reclaimed recovery rate it is relatively low.Application case such as Patent No. 961184507 discloses a kind of from bone coal
The method that vanadium pentoxide is extracted in navajoite, its concrete technology operating procedure is：After ore after broken is through part decarburization, ratio
It is NaCl and CaCO within ore weight 8%3Simultaneously add ore in enter ball milling, balling-up operation, after balling-up
It is calcined at a temperature of 750-850 DEG C, the pellet after roasting leaches in being directly placed into the acid solution that PH is 1-3, what quiet leaching came
Solution adds flocculant to be purified, and is then extracted and is stripped, and the vanadium that back extraction is taken out heats 40-100 DEG C in weak base
Property under purified, heavy ammonium metavanadate, filtration washing are then carried out again and are dried and dry thermal cracking.This application case is to use sodium
Low Valent Vanadium is converted into what high price vanadium was extracted by the mode of roasting, so as to cause environmental pollution serious, and to the recovery rate of vanadium
It is relatively low.
In sum, the enriching and recovering containing vanadium in vanadium resource low-grade for v-bearing steel slag and Rock coal containing alum etc., at present also
There is no practicable method, it is necessary to continue to explore new direction.
The content of the invention
1. the invention technical problem to be solved
Low-grade Rock coal containing alum is carried out with the vanadium in v-bearing steel slag using prior art it is an object of the invention to overcome
Above shortcomings during recycling, and a kind of method that Rock coal containing alum and v-bearing steel slag combine vanadium enrichment is provided.The present invention
By the combination of Rock coal containing alum and v-bearing steel slag, richness can be carried out simultaneously to the vanadium in low-grade Rock coal containing alum and v-bearing steel slag
Collection, the grade of vanadium is higher in gained richness vanadium phase, and vanadium enrichment degree is high, the physical property difference of rich vanadium phase and other ore deposit phases in material compared with
Greatly, so as to be conducive to follow-up rich vanadium to be separated, and environmental pollution is small.
2. technical scheme
To reach above-mentioned purpose, the technical scheme that the present invention is provided is：
The method that a kind of Rock coal containing alum of the invention and v-bearing steel slag combine vanadium enrichment, its step is as follows：
(1) material mixing：Rock coal containing alum and v-bearing steel slag are mixed to get compound in proportion；
(2) heating and cooling treatment：After the mixed material heating that will be obtained is incubated 15-25 minutes to 1450~1500 DEG C, with 5
The cooldown rate of~10 DEG C/min is cooled to 1200~1250 DEG C, then naturally cools to room temperature so that Rock coal containing alum with contain
Vanadium in vanadium steel slag enters same vanadium enrichment phase.
Further, CaO%/(SiO in the middle gained compound of the step (1)2%+Al2O3%)=0.8~1.4,
The mass percent sum of FeO and MgO is not less than 10%.
Further, described Rock coal containing alum includes the component of following mass percent：50~70%SiO2, 5~
20%Al2O3, 2~6%FeOt, 0.3~1.3%V2O5, 1~4%P2O5, 1~4%S and 10~20%C.
Further, described v-bearing steel slag includes the component of following mass percent：40~55%CaO, 10~
20%SiO2, 20-30%FeO, 1~5%V2O5, 1~4%P2O5With 3~12%MgO.
Further, the mixed material heating is stirred to being blown into nitrogen after 1450~1500 DEG C, so that bone coal
It is fully dissolved in slag.
Further, in the step (2) by mixed material heating and to be cooled to gained vanadium enrichment after room temperature be mutually rich vanadium
Solid solution phase-(Fe, Mg) O (V, Al, Fe)2O3。
Further, the content of vanadium in gained vanadium enrichment phase is with V2O5Meter is not less than 20%, and Rock coal containing alum and V-alloyed steel
The enrichment of vanadium in slag in the phase is more than 80%.
Further, gained vanadium enrichment mutually also includes MgO and Al2O3, and MgO and Al2O3Mass percent sum not
Higher than 35%.
Further, S and P is not contained in gained vanadium enrichment phase.
3. beneficial effect
The technical scheme provided using the present invention, compared with existing known technology, with following remarkable result：
(1) method that a kind of Rock coal containing alum of the invention and v-bearing steel slag combine vanadium enrichment, by by v-bearing steel slag with contain
Scherbinaite coal is combined carries out vanadium enrichment, and basicity and cooling system to compound control effectively, such that it is able to V-alloyed steel
Slag is enriched with simultaneously with the vanadium in Rock coal containing alum, and the enrichment of vanadium is higher, and environmental pollution is small in enrichment processing procedure, and institute
Obtain vanadium enrichment phase and differ larger with the physical property of other ore deposit phases, consequently facilitating the separation of follow-up vanadium enrichment phase.
(2) method that a kind of Rock coal containing alum of the invention and v-bearing steel slag combine vanadium enrichment, gained vanadium enrichment phase (Fe, Mg)
O·(V,Al,Fe)2O3Middle vanadium exists with trivalent form, it is not easy to form solid solution with the phosphorus pentoxide in slag such that it is able to
It is prevented effectively from phosphorus and dissolves in vanadium enrichment phase, have very important effect to follow-up solution vanadium-rich mineral vanadium extraction, it is ensured that reclaims vanadium resource
Performance.
(3) method that a kind of Rock coal containing alum of the invention and v-bearing steel slag combine vanadium enrichment, rich by vanadium under the reducing conditions
Collect rich vanadium solid solution phase-(Fe, Mg) O (V, Al, Fe)2O3In, this is mutually highly stable, is not easy to leach in natural water,
Remain in tailings pollution of the vanadium to environment so as to avoid.Additionally, the tailings after its rich vanadium is separated can be built as cement etc.
Material, so as to reduce the secondary pollution of waste residue.
Brief description of the drawings
Fig. 1 is that the mark scan Electronic Speculum of square iron stone phase in Rock coal containing alum of the present invention and v-bearing steel slag joint vanadium enrichment sample is shone
Piece；
Fig. 2 is the constituent analysis collection of illustrative plates of the square iron stone phase of Fig. 1 marks；
Fig. 3 is the stereoscan photograph of silicate phase in Rock coal containing alum of the present invention and v-bearing steel slag joint vanadium enrichment sample；
Fig. 4 is the constituent analysis collection of illustrative plates of the silicate phase of mark in Fig. 3；
Fig. 5 is that the mark scan Electronic Speculum of rich vanadium phase in Rock coal containing alum of the present invention and v-bearing steel slag joint vanadium enrichment sample is shone
Piece；
Fig. 6 is the constituent analysis collection of illustrative plates of the rich vanadium phase of mark in Fig. 5.
Specific embodiment
Rock coal containing alum of the invention and v-bearing steel slag combine the method for vanadium enrichment, are by a certain percentage and to contain Rock coal containing alum
Vanadium steel slag mixes, and makes CaO%/(SiO in compound2%+Al2O3%) mass ratio is between 0.8~1.4, FeO+MgO mass hundred
Point be not less than 10% than content (rich vanadium solid solution needs at least one in both oxides and could be formed in the present invention,
Content is too low to be unfavorable for that rich vanadium is mutually formed), other constituent contents are not limited.By above-mentioned mixed material heating to 1450 DEG C~1500 DEG C,
Molten iron balance under the conditions of, be cooled to 1200~1250 DEG C with 5~10 DEG C/min, after naturally cool to room temperature.Rich vanadium is in drop
Generated during temperature, gained vanadium enrichment is mutually rich vanadium solid solution phase-(Fe, Mg) O (V, Al, Fe)2O3, it has the following properties that：
(1) content of vanadium is with V2O5Meter is not less than 20%；(2) enrichment of the vanadium in bone coal and slag in the phase is more than 80%；(3) it is rich
Vanadium phase MgO%+Al2O3The content of % is not higher than 35%, and does not contain p and ses, so as to reduce the treatment after rich vanadium is separated
Difficulty.
The present invention extracts the deficiency for existing for existing Rock coal containing alum and vanadium in vanadium containing steel slag enrichment, such as rich using selectivity
When diversity method is extracted to the vanadium in v-bearing steel slag, the physical property of gained richness vanadium phase and main body ore deposit phase silicate phase in slag compared with
It is close, rich vanadium is separated out so as to cause to be difficult to.And the vanadium in Rock coal containing alum is returned using existing wet underwater welding
In the time receiving, serious pollution can be caused to environment, and the recovery rate of vanadium is relatively low.Simultaneously because vanadium belongs to non-ferrous metal, extracting vanadium from stone coal
All gone in for the study by the scholar of nonferrous metallurgy industry all the time, and nonferrous metallurgy usage of trade wet underwater welding；V-bearing steel slag
It is the discarded object of iron and steel metallurgical industry, related research work is undertaken by the scholar of the industry, and iron and steel metallurgical industry tends to fire
Method is extracted, and is not intersected substantially each other.Therefore, all it is generally in the prior art that v-bearing steel slag and Rock coal containing alum is independent
Processed, the present invention innovatively proposes to carry out enrichment treatment to vanadium therein by the combination of Rock coal containing alum and v-bearing steel slag
Method, and Rock coal containing alum is controlled with the mixed proportion of v-bearing steel slag, it is ensured that the basicity of compound be 0.8~1.4 it
Between, FeO+MgO contents are not less than 10%, while the heating and cooling system to compound optimize design such that it is able to promote
Make vanadium enrichment phase (Fe, Mg) OV, Al, Fe in cooling procedure)2O3Formation, make the equal energy of vanadium in Rock coal containing alum and v-bearing steel slag
Effectively it is enriched in the phase.Gained vanadium enrichment phase (Fe, Mg) O (V, Al, Fe)2O3Physical property and other ore deposit phases in slag
Physical property difference is larger such that it is able to ensure that the enrichment of vanadium in efficiently separating for follow-up vanadium enrichment phase, and the phase is higher, rich
Environmental pollution is small in collection processing procedure.It is trivalent, it is not easy in slag because vanadium exists in vanadium trioxide form in the phase
Phosphorus pentoxide formed solid solution such that it is able to be prevented effectively from phosphorus and dissolve in vanadium enrichment phase, have to follow-up solution vanadium-rich mineral vanadium extraction
Very important effect, it is ensured that reclaim the performance of vanadium resource.
Inventor has found in experimentation, because the vanadium in v-bearing steel slag exists with the various valence states of+3 ,+4 and+5 valencys, because
This is unfavorable for the enrichment treatment of vanadium, and phosphorus in slag inevitably enters rich vanadium phase, V together with vanadium2O5With P2O5It is difficult to
Separate, so as to influence the normal of subsequent recovery vanadium resource to use.Therefore, during a difficult point of the invention is that and how to avoid slag
The influence of phosphorus.The present invention carries out Combined Treatment by by Rock coal containing alum and v-bearing steel slag, on the one hand can neutralize respective soda acid
Degree (v-bearing steel slag is high alkalinity slag, and Rock coal containing alum is acid mineral), and to the basicity CaO%/(SiO of compound2%+
Al2O3%) and the content sum of FeO+MgO optimizes control such that it is able to be rich vanadium phase (Fe, Mg) O (V, Al, Fe)2O3
Formation suitable condition is provided.Vanadium in another aspect Rock coal containing alum is basic to be present in alumino-silicate with+trivalent, by containing
CaO and silicate reaction in vanadium steel slag, destroy its crystal structure, are discharged such that it is able to general+trivalent vanadium；In v-bearing steel slag
Vanadium with multivalent state exist, because part iron oxide in slag can be reduced to form metallic state by the presence of carbon in Rock coal containing alum
Iron, while certain reducing atmosphere is created, so as to for the price unification of vanadium in slag provides condition, make two kinds containing vanadium resource
In vanadium exist with trivalent form, and then the phosphorus in slag can be prevented effectively from enter rich vanadium phase together.Additionally, in Rock coal containing alum
The presence of carbon can also provide heat for compound high-temperature process, reduce energy resource consumption, be easy to industrial operation, promote rich vanadium solid solution
The formation of body phase.V-bearing steel slag and Rock coal containing alum are carried out Combined Treatment by the present invention, because both are low-grade containing vanadium resource
Studying point has complementarity, and the tailings after rich vanadium is separated can be as construction material, so as to reduce environmental pollution.
To further appreciate that present disclosure, with reference to specific embodiment, the invention will be further described.
Embodiment 1
A kind of Rock coal containing alum and v-bearing steel slag of the present embodiment combine the method for vanadium enrichment, and its step is as follows：
(1) material mixing：Rock coal containing alum and v-bearing steel slag are mixed to get compound in proportion, make CaO% in compound/
(SiO2%+Al2O3The mass percent sum of %)=0.8, FeO and MgO is not less than 10%.Above-mentioned Rock coal containing alum includes as follows
The component of mass percent：63.4%SiO2, 7.4%Al2O3, 6.6%CaO, 2.8%Fe2O3, 2.2%K2O, 0.9%V2O5(contain
Vanadium in scherbinaite coal exists with trivalent form, and this area is generally being converted into V2O5Content afterwards is measured), 1.0%P2O5、
1.3%S, 10.7%C and a small amount of other compositions 1.3%.V-bearing steel slag includes the component of following mass percent：40.5%
CaO, 10.5%SiO2, 25.3%Fe2O3, 2.6%V2O5, 3.2%P2O5, 10.5%MgO and on a small quantity other compositions 2.9%.
(2) heating and cooling treatment：The mixed material heating that will be obtained to 1450 DEG C be incubated 25 minutes, while be blown into nitrogen entering
Row stirring, so that bone coal is fully dissolved in slag.Then compound is made to be cooled to 1250 DEG C with the cooldown rate of 5 DEG C/min, so
After naturally cool to room temperature so that the vanadium in Rock coal containing alum and v-bearing steel slag enters same vanadium enrichment phase.Institute in the present embodiment
It is mutually rich vanadium solid solution phase-(Fe, Mg) O (V, Al, Fe) to obtain vanadium enrichment2O3, the content of vanadium in gained vanadium enrichment phase is with V2O5Meter
It is not less than 20%, enrichment of the vanadium in Rock coal containing alum and v-bearing steel slag in the phase is more than 80%.The vanadium enrichment is mutually also wrapped
Include MgO and Al2O3, and MgO and Al2O3Mass percent sum be not higher than 35%, gained vanadium enrichment does not contain p and ses mutually.
Specific method is to be detected to the ore deposit phase composition in cold conditions slag：It is sampled in various location, in scanning electricity
Detected (as shown in Fig. 1, Fig. 3, Fig. 5), using the mineral facies in scanning electron microscope analysis slag specimen, and by sweep attachment power spectrum under mirror
Analyze the chemical composition (analysis result is respectively as shown in Fig. 2, Fig. 4 and Fig. 6) of each phase.Wherein table 1 show each ore deposit in cold conditions slag
The specific chemical composition of thing phase, can be seen that with reference to accompanying drawing and table 1：Square iron stone is mutually free of vanadium in the present embodiment, and vanadium is mainly enriched with
In vanadium solid solution phase high-(Fe, Mg) O (V, Al, Fe)2O3, this mutually contains part magnesium and aluminium, and content of vanadium reaches more than 18%, and
(Fe,Mg)O·(V,Al,Fe)2O3In it is not phosphorous, phosphorus is enriched in silicic acid calcium phase.
The present embodiment Rock coal containing alum of table 1 combines the chemical composition of each mineral facies in vanadium enrichment cold conditions sample with v-bearing steel slag
Embodiment 2
A kind of Rock coal containing alum and v-bearing steel slag of the present embodiment combine the method for vanadium enrichment, and its step is as follows：
(1) material mixing：Rock coal containing alum and v-bearing steel slag are mixed to get compound in proportion, make CaO% in compound/
(SiO2%+Al2O3The mass percent sum of %)=1.4, FeO and MgO is not less than 10%.Above-mentioned Rock coal containing alum includes as follows
The component of mass percent：51.8%SiO2, 13.6%Al2O3, 5.8%FeOt, 1.1%V2O5, 1.3%P2O5, 4.3%S,
1.2%MgO, 3.4%K2O, 17.5%C and a small amount of other compositions.V-bearing steel slag includes the component of following mass percent：
45.0%CaO, 14.7%SiO2, 26.6%FeO, 3.3%V2O5, 2.0%P2O5, 3.7%MgO, 1.7%Al2O3And it is a small amount of
Other compositions 3.2%.
(2) heating and cooling treatment：The mixed material heating that will be obtained to 1500 DEG C be incubated 15 minutes, while be blown into nitrogen entering
Row stirring, so that bone coal is fully dissolved in slag.Then compound is made to be cooled to 1200 DEG C with the cooldown rate of 10 DEG C/min, so
After naturally cool to room temperature so that the vanadium in Rock coal containing alum and v-bearing steel slag enters same vanadium enrichment phase.Institute in the present embodiment
It is mutually rich vanadium solid solution phase-(Fe, Mg) O (V, Al, Fe) to obtain vanadium enrichment2O3, the content of vanadium in gained vanadium enrichment phase is with V2O5Meter
It is not less than 20%, enrichment of the vanadium in Rock coal containing alum and v-bearing steel slag in the phase is more than 80%.The vanadium enrichment is mutually also wrapped
Include MgO and Al2O3, and MgO and Al2O3Mass percent sum be not higher than 35%, gained vanadium enrichment does not contain p and ses mutually.
Testing result is closer to embodiment 1 to be detected to the ore deposit phase composition in the present embodiment gained cold conditions slag.
Embodiment 3
A kind of Rock coal containing alum and v-bearing steel slag of the present embodiment combine the method for vanadium enrichment, and its step is as follows：
(1) material mixing：Rock coal containing alum and v-bearing steel slag are mixed to get compound in proportion, make CaO% in compound/
(SiO2%+Al2O3The mass percent sum of %)=1.0, FeO and MgO is not less than 10%.Above-mentioned Rock coal containing alum includes as follows
The component of mass percent：63.2%SiO2, 10.1%Al2O3, 3.9%Fe2O3, 3.0%K2O, 1.6%MgO, 1.3%V2O5、
1.9%P2O5, 2.2%S, 12.2%C and a small amount of other compositions 0.7%.V-bearing steel slag includes the group of following mass percent
Point：46.1%CaO, 12.6%SiO2, 24.4%Fe2O3, 1.6%V2O5, 2.4%P2O5, 7.5%MgO and it is a small amount of other into
Divide 3.9%.
(2) heating and cooling treatment：The mixed material heating that will be obtained to 1450~1500 DEG C be incubated 20 minutes, while being blown into
Nitrogen is stirred, so that bone coal is fully dissolved in slag.Then compound is made to be cooled to 1230 with the cooldown rate of 7 DEG C/min
DEG C, room temperature is then naturally cooled to, so that Rock coal containing alum enters same vanadium enrichment phase with the vanadium in v-bearing steel slag.The present embodiment
Middle gained vanadium enrichment is mutually rich vanadium solid solution phase-(Fe, Mg) O (V, Al, Fe)2O3, content of vanadium in gained vanadium enrichment phase with
V2O5Meter is not less than 20%, and enrichment of the vanadium in Rock coal containing alum and v-bearing steel slag in the phase is more than 80%.The vanadium enrichment phase
Also include MgO and Al2O3, and MgO and Al2O3Mass percent sum be not higher than 35%, gained vanadium enrichment do not contain mutually phosphorus and
Sulphur.Testing result is closer to embodiment 1 to be detected to the ore deposit phase composition in the present embodiment gained cold conditions slag.
According to embodiment 1-3, the method for combining vanadium enrichment using Rock coal containing alum of the invention and v-bearing steel slag, vanadium is nearly all
It is enriched in vanadium solid solution phase high-(Fe, Mg) O (V, Al, Fe)2O3, the phase vanadium grade is high and does not contain phosphorus, is a kind of high-quality
Vanadium enrichment phase.
Claims (9)
1. a kind of method that Rock coal containing alum and v-bearing steel slag combine vanadium enrichment, it is characterised in that its step is as follows：
(1) material mixing：Rock coal containing alum and v-bearing steel slag are mixed to get compound in proportion；
(2) heating and cooling treatment：After the mixed material heating that will be obtained is incubated 15-25 minutes to 1450~1500 DEG C, with 5~10
DEG C/cooldown rate of min is cooled to 1200~1250 DEG C, room temperature is then naturally cooled to, so that Rock coal containing alum and V-alloyed steel
Vanadium in slag enters same vanadium enrichment phase.
2. the method that a kind of Rock coal containing alum according to claim 1 and v-bearing steel slag combine vanadium enrichment, it is characterised in that：Institute
State CaO%/(SiO in the middle gained compound of step (1)2%+Al2O3The mass percent of %)=0.8~1.4, FeO and MgO it
Be not less than 10%.
3. the method that a kind of Rock coal containing alum according to claim 2 and v-bearing steel slag combine vanadium enrichment, it is characterised in that：Institute
The Rock coal containing alum stated includes the component of following mass percent：50~70%SiO2, 5~20%Al2O3, 2~6%FeOt、0.3
~1.3%V2O5, 1~4%P2O5, 1~4%S and 10~20%C.
4. the method that a kind of Rock coal containing alum according to claim 2 and v-bearing steel slag combine vanadium enrichment, it is characterised in that：Institute
The v-bearing steel slag stated includes the component of following mass percent：40-55%CaO, 10~20%SiO2, 20-30%FeO, 1~
5%V2O5, 1~4%P2O5With 3~12%MgO.
5. the method that a kind of Rock coal containing alum and v-bearing steel slag according to any one of claim 1-4 combines vanadium enrichment, its
It is characterised by：The mixed material heating is stirred to being blown into nitrogen after 1450~1500 DEG C, so that bone coal is fully dissolved in steel
Slag.
6. the method that a kind of Rock coal containing alum and v-bearing steel slag according to any one of claim 1-4 combines vanadium enrichment, its
It is characterised by：In the step (2) by mixed material heating and be cooled to after room temperature gained vanadium enrichment mutually for rich vanadium solid solution phase-
(Fe,Mg)O·(V,Al,Fe)2O3。
7. the method that a kind of Rock coal containing alum according to claim 6 and v-bearing steel slag combine vanadium enrichment, it is characterised in that：Institute
The content of vanadium in vanadium enrichment phase is obtained with V2O5Meter is not less than 20%, and the richness of vanadium in Rock coal containing alum and v-bearing steel slag in the phase
Intensity is more than 80%.
8. the method that a kind of Rock coal containing alum according to claim 7 and v-bearing steel slag combine vanadium enrichment, it is characterised in that：Institute
Obtaining vanadium enrichment mutually also includes MgO and Al2O3, and MgO and Al2O3Mass percent sum be not higher than 35%.
9. the method that a kind of Rock coal containing alum according to claim 8 and v-bearing steel slag combine vanadium enrichment, it is characterised in that：Institute
Do not contain S and P in vanadium enrichment phase.
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