CN108018465A - A kind of method that aluminothermic reduction ilmenite prepares Al-Ti-Fe alloys in ice crystal ground mass fused salt - Google Patents
A kind of method that aluminothermic reduction ilmenite prepares Al-Ti-Fe alloys in ice crystal ground mass fused salt Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C21/00—Alloys based on aluminium
- C22C21/003—Alloys based on aluminium containing at least 2.6% of one or more of the elements: tin, lead, antimony, bismuth, cadmium, and titanium
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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
- C22B34/10—Obtaining titanium, zirconium or hafnium
- C22B34/12—Obtaining titanium or titanium compounds from ores or scrap by metallurgical processing; preparation of titanium compounds from other titanium compounds see C01G23/00 - C01G23/08
- C22B34/1218—Obtaining titanium or titanium compounds from ores or scrap by metallurgical processing; preparation of titanium compounds from other titanium compounds see C01G23/00 - C01G23/08 obtaining titanium or titanium compounds from ores or scrap by dry processes
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- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B5/00—General methods of reducing to metals
- C22B5/02—Dry methods smelting of sulfides or formation of mattes
- C22B5/04—Dry methods smelting of sulfides or formation of mattes by aluminium, other metals or silicon
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- C25C3/00—Electrolytic production, recovery or refining of metals by electrolysis of melts
- C25C3/06—Electrolytic production, recovery or refining of metals by electrolysis of melts of aluminium
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Abstract
The invention belongs to metal smelt to extract field, the method that aluminothermic reduction ilmenite prepares Al Ti Fe alloys in more particularly to a kind of ice crystal ground mass fused salt.The present invention is using metallic aluminium as reducing agent, 0.5 6h of aluminothermic reduction is carried out to ilmenite in ice crystal ground mass fused-salt medium in 930 985 DEG C, then alloy and fused salt are separated, obtain the ice crystal ground mass fused salt of Al Ti Fe alloys and richness Al2O3, wherein Al Ti Fe alloys contain 59.44~83.55%Al by weight percentage, 12.42~36.62%Ti, 0.41~9.03%Fe, 0.87~2.68%Si.Solid ilmenite directly is reduced with molten aluminum compared with prior art, reaction temperature needed for the present invention substantially reduces, and reduces energy consumption, does not lose metallic aluminium, and the alloy product purity that reduction obtains is high.
Description
Technical field
The invention belongs to metal smelt to extract field, aluminothermic reduction ilmenite system in more particularly to a kind of ice crystal ground mass fused salt
The method of standby Al-Ti-Fe alloys.
Background technology
The titanium resource reserves very abundant of China, is distributed across national 20 provinces and regions.Wherein, the ratio shared by ilmenite is very
Greatly, rutile resource wretched insufficiency.In ferrotianium ore reserves, most of is rock ore deposit, and small part is placer.Titanium all over China
The percentage by weight of the primary chemical composition of iron ore is as shown in table 1.
The primary chemical composition of the ilmenite of table 1 all over China
At present, most ilmenites is used to prepare the rich-titanium materials such as synthetic rutile and high titanium slag, then uses
Kroll process carries out rich-titanium material the industrial production of titanium.However, the technological process length of Kroll process, operating process is complicated, chlorination
Process produces chlorine and chloride contamination environment, and can only batch production.At the same time, artificial golden red is prepared with ilmenite
The various methods of the rich-titanium material such as stone and high titanium slag are there is also many shortcomings, such as electric furnace smelting process production titanium slag and the pig iron disappear
Consumption is high, and selective chlorination prepares the serious corrosion of equipment of synthetic rutile and pollution environment, carbonizatin method high energy consumption and production capacity is low, acid
Leaching method prepares synthetic rutile, and there are the problems such as technological process complexity and equipment corrosion.In short, above method main purpose is
Recovery Pd, the titanium being not carried out in ilmenite, iron while, recycle, and to the separation of titanium, ferro element in ilmenite
Journey extends the production cycle and adds energy consumption.
Thus, research uses FFC methods or SOM methods both at home and abroad, i.e., directly using iron iron ore as cathode, in calcium chloride fused salt
Electrolysis, cathode obtain ferro-titanium.Fused salt electrolysis process substantially reduces technological process, and avoids the environmental pollution of traditional handicraft
Problem.But molten-salt electrolysis ilmenite fails to realize industrial production, because its current efficiency is relatively low, electrolytic production is impure, and
Ilmenite powder need to be broken to less than 50 μm by fused salt electrolysis process, and then iron iron ore electrode is made in sintering at 800-1000 DEG C of high temperature,
Which greatly enhances production cost and energy consumption.
The content of the invention
Prepared in view of the deficienciess of the prior art, the present invention provides aluminothermic reduction ilmenite in a kind of ice crystal ground mass fused salt
The method of Al-Ti-Fe alloys, it is therefore an objective to by being carried out at high temperature to the ilmenite containing oxides such as TiO2, Fe2O3, FeO
Aluminothermic reduction, the oxides such as TiO2, Fe2O3, FeO are reduced, and the ice crystal ground mass for obtaining Al-Ti-Fe alloys and richness Al2O3 melts
Salt, then, is added to industrial aluminum electrolysis bath by the ice crystal ground mass fused salt of rich Al2O3 and is electrolysed, prepare the higher gold of purity
Belong to aluminium.
Realize that the technical solution of above-mentioned purpose follows the steps below：
Using metallic aluminium as reducing agent, aluminothermic reduction is carried out to ilmenite in ice crystal ground mass fused-salt medium in 930-985 DEG C
0.5-6h, then alloy and fused salt are separated, obtain the ice crystal ground mass fused salt of Al-Ti-Fe alloys and richness Al2O3, wherein Al-
Ti-Fe alloy contains 59.44~83.55%Al, 12.42~36.62%Ti, 0.41~9.03%Fe, 0.87 by weight percentage
~2.68%Si.
Wherein, the dosage of the metal al reducing agent is 2 of theoretical reduction agent dosage molal quantity needed for reduced ilmenite
~5 times.
The addition of the ilmenite is the 2~6% of ilmenite and ice crystal ground mass fused salt gross mass.
The ice crystal ground mass molten salt composition contains 15~75%NaF, 10~50%AlF3,0~5% by weight percentage
CaF2,0~5%LiF, the molar ratio of 0~5%MgF2, wherein NaF and AlF3 are (2.0-2.8)：1.
The ice crystal ground mass fused salt of the rich Al2O3 is electrolysed in 930-985 DEG C, with Fe-Ni alloy/C or Fe-Ni-
Al2O3 cermets are anode, and molten aluminum is cathode, control electrolytic process cathode and anodic current density in 0.4~1.2A/
Cm2, metallic aluminium is obtained in cathode, obtains oxygen in anode, the wherein purity by weight of metallic aluminium is 95.07-~98.78%, miscellaneous
Matter is mainly 0.89~3.68%Fe and 0.23~2.53%Ti.
Compared with prior art, the features of the present invention and beneficial effect are：
The ice crystal ground mass fused-salt medium that the method for the present invention uses can dissolve what ilmenite and thermite reaction produced at the same time
Aluminium oxide, since the ice crystal ground mass fused salt and molten aluminum of dissolving ilmenite are there are larger density contrast, molten aluminum is below, fused salt
Above, the thermite reaction on the interface of molten aluminum and fused salt, generates Al-Ti-Fe alloys.The density ratio of Al-Ti-Fe alloys
Aluminium is big, therefore the Al-Ti-Fe alloys generated are spread to molten aluminum lower part, and the aluminium oxide generated is then gradually dissolved into ice crystal ground mass
In fused salt, this is conducive to the progress of molten aluminum-follow-up thermite reaction in ice crystal ground mass fused salt interface.The reactional equation being specifically related to
Formula is as follows：
[FeTiO3]+Al=Al3Ti+Fe+ [Al2O3]
Solubility of the metallic aluminium in 1005 DEG C of ice crystal ground mass fused salts is about 0.24%, forms chemical true solution, contains Al
(I) ion.Ilmenite (FeTiO3) is the compound of FeO and TiO2, the dissolving in ice crystal ground mass fused salts of the TiO2 at 1000 DEG C
Spend for 5.91%, FeO 6.0%, but FeO is easily oxidized to Fe2O3 under high temperature oxidation stability atmosphere, and Fe2O3 is in ice crystal
Solubility in base fused salt is only 0.18%.The present invention is to be melted using titanium oxide and iron oxide in ilmenite composition in ice crystal ground mass
Dissolubility difference in salt, the making choice property aluminothermic reduction in ice crystal ground mass fused-salt medium, can obtain the Al-Ti- of the low iron of rich titanium
Fe alloys, realize that ferrotianium separates to a certain degree.When therefore, in the very low electrolyte of aluminium content, ice crystal ground mass molten salt electrolyte
Main oxidation state ion in system is Ti (IV), and reduction-state ion is Al (I), both reaction tendencies are more than Fe (III) and Al
(I) reaction tendency.Therefore, by controlling al reducing agent dosage to realize that ferrotianium separates.The reaction being specifically related to is：
2Al (I) (complexing)+Ti (IV) (complexing)=Ti+2Al (III) (complexing)
Ti+3Al=Al3Ti
Al (I) (complexing)+Fe (II) (complexing)=Fe+Al (III) (complexing)
3Al (I) (complexing)+2Fe (III) (complexing)=2Fe+3Al (III) (complexing)
During the present invention contains the oxygen enrichment aluminium of MgO and CaO impurity using molten-salt electrolysis, in MgO and CaO and ice crystal
AlF3 hairs should generate Al2O3, MgF2 and CaF2, and MgF2 and CaF2 are the additives of aluminium electrolysis process, magnesium ion and calcium from
Son cannot be restored, and fine aluminium can be obtained in cathode.If thermite reaction is not thorough, i.e., contain in ice crystal ground mass fused salt
The ilmenite not being reduced, then the impurity such as iron, titanium are contained in the metallic aluminium that cathode obtains by molten-salt electrolysis.
To sum up, the present invention has the following advantages：Reduction process is liquid metal and solubilised state in ice crystal ground mass molten salt system
Complex ion react, reduction reaction rate is fast, metal and fused salt good separating effect after reaction, and control reducing agent dosage is also
, it can be achieved that ferrotianium separates during former ilmenite, the aluminium oxide that the fused salt after separation contains saturation can Direct Electrolysis to obtain purity higher
Metallic aluminium.Solid ilmenite directly is reduced with molten aluminum compared with prior art, required reaction temperature substantially reduces, and reduces energy
Consumption, does not lose metallic aluminium, and the alloy product purity that reduction obtains is high.
Brief description of the drawings
Fig. 1 is the technological process that aluminothermic reduction ilmenite prepares Al-Ti-Fe alloys in ice crystal ground mass fused salt of the invention
Figure.
Embodiment
Ilmenite component used is as follows by weight percentage in the embodiment of the present invention：41.70-51.76%TiO2,
24.4-40.95%FeO, 5.60-16.08%Fe2O3,0.10-1.50%CaO, 0.05-4.60%MgO, 0.67-9.99%
SiO2,0.23-3.18%Al2O3, surplus are impurity.
The purity by weight 99% of reducing agent aluminium block used in the embodiment of the present invention.
The ice crystal (Na3AlF6) selected in the embodiment of the present invention, AlF3, CaF2, LiF, and MgF2 are industry purchased in market
Product, purity by weight >=99%.
Fe-Ni base inert anodes in the embodiment of the present invention are disclosed in patent ZL03110863.6 and ZL03111484.9
Metal base aluminium electrolytic inert anode.
Embodiment 1
Using metallic aluminium as reducing agent, aluminothermic reduction 2h, titanium are carried out to ilmenite in ice crystal ground mass fused-salt medium in 930 DEG C
Iron ore component is according to mass percent：41.70%TiO2,30.24%FeO, 10.63%Fe2O3,1.50%CaO, 1.89%
MgO, 9.99%SiO2,3.18%Al2O3, surplus are impurity, after reaction separate alloy and fused salt, obtain Al-Ti-Fe
The ice crystal ground mass fused salt of alloy and richness Al2O3, Al-Ti-Fe alloys contain Al 83.55%, Ti 15.15% by mass percentage,
Fe 0.41%, Si 0.89%；
Wherein, the ice crystal ground mass fused salt of rich Al2O3 is electrolysed in 930 DEG C, using Fe-Ni alloy/C as anode, molten aluminum is
Cathode, control electrolytic process cathode and anodic current density in 0.4A/cm2, obtain metallic aluminium in cathode, Al in metallic aluminium
Quality purity is 95.07%, and containing Ti 1.93%, Fe 1.86%, oxygen is obtained in anode.
The dosage of the metal al reducing agent is 2 times of theoretical reduction agent dosage molal quantity needed for former ilmenite.
The addition of the ilmenite is the 2% of ilmenite and ice crystal ground mass fused salt gross mass.
The molar ratio of NaF and AlF3 is 2.0 in the ice crystal ground mass fused salt：1.
Embodiment 2
Using metallic aluminium as reducing agent, aluminothermic reduction 2h, titanium are carried out to ilmenite in ice crystal ground mass fused-salt medium in 955 DEG C
Iron ore component is according to mass percent：48.68%TiO2,36.78%FeO, 10.97%Fe2O3,0.05%CaO, 1.18%
MgO, 0.67%SiO2,0.60%Al2O3, surplus are impurity, after reaction separate alloy and fused salt, obtain Al-Ti-Fe
The ice crystal ground mass fused salt of alloy and richness Al2O3, Al-Ti-Fe alloys contain Al 79.25%, Ti 18.78% by mass percentage,
Fe 1.05%, Si 0.92%；
Wherein, the ice crystal ground mass fused salt of rich Al2O3 is electrolysed in 955 DEG C, using Fe-Ni-Al2O3 cermets as sun
Pole, molten aluminum are cathode, control electrolytic process cathode and anodic current density in 0.6A/cm2, obtain metallic aluminium in cathode, gold
The quality purity for belonging to Al in aluminium is 95.78%, and containing Ti 2.11%, Fe 1.07%, oxygen is obtained in anode.
The dosage of the metal al reducing agent is 3 times of theoretical reduction agent dosage molal quantity needed for former ilmenite.
The addition of the ilmenite is the 3% of ilmenite and ice crystal ground mass fused salt gross mass.
The molar ratio of NaF and AlF3 is 2.2 in ice crystal ground mass fused salt in described：1.
Embodiment 3
Using metallic aluminium as reducing agent, aluminothermic reduction 2h, titanium are carried out to ilmenite in ice crystal ground mass fused-salt medium in 965 DEG C
Iron ore component is according to mass percent：49.85%TiO2,35.50%FeO, 9.58%Fe2O3,0.24%CaO, 1.99%
MgO, 0.86%SiO2,0.23%Al2O3, surplus are impurity, after reaction separate alloy and fused salt, obtain Al-Ti-Fe
The ice crystal ground mass fused salt of alloy and richness Al2O3, Al-Ti-Fe alloys contain Al 81.05%, Ti 16.20% by mass percentage,
Fe 1.88%, Si 0.87%；
Wherein, the ice crystal ground mass fused salt of rich Al2O3 is electrolysed in 965 DEG C, using Fe-Ni alloy/C as anode, molten aluminum is
Cathode, control electrolytic process cathode and anodic current density in 0.8A/cm2, obtain metallic aluminium in cathode, Al in metallic aluminium
Quality purity is 96.78%, and containing Ti 1.21%, Fe 1.95%, oxygen is obtained in anode.
The dosage of the metal al reducing agent is 4 times of theoretical reduction agent dosage molal quantity needed for former ilmenite.
The addition of the ilmenite is the 4% of ilmenite and ice crystal ground mass fused salt gross mass.
The molar ratio of NaF and AlF3 is 2.4 in the ice crystal ground mass fused salt：1.
Embodiment 4
Using metallic aluminium as reducing agent, aluminothermic reduction 2h, titanium are carried out to ilmenite in ice crystal ground mass fused-salt medium in 975 DEG C
Iron ore component is according to mass percent：51.76%TiO2,24.40%FeO, 16.08%Fe2O3,0.34%CaO, 0.05%
MgO, 0.82%SiO2,0.79%Al2O3, surplus are impurity, after reaction separate alloy and fused salt, obtain Al-Ti-Fe
The ice crystal ground mass fused salt of alloy and richness Al2O3, Al-Ti-Fe alloys contain Al 76.64%, Ti 15.65% by mass percentage,
Fe 6.17%, Si 1.54%；
Wherein, the ice crystal ground mass fused salt of rich Al2O3 is electrolysed in 975 DEG C, using Fe-Ni-Al2O3 cermets as sun
Pole, molten aluminum are cathode, control electrolytic process cathode and anodic current density in 1.0A/cm2, obtain metallic aluminium in cathode, gold
The quality purity for belonging to Al in aluminium is 96.28%, and containing Ti 2.53%, Fe 1.07%, oxygen is obtained in anode.
The dosage of the metal al reducing agent is 5 times of theoretical reduction agent dosage molal quantity needed for former ilmenite.
The addition of the ilmenite is the 4% of ilmenite and ice crystal ground mass fused salt gross mass.
The molar ratio of NaF and AlF3 is 2.6 in the ice crystal ground mass fused salt：1.
Embodiment 5
Using metallic aluminium as reducing agent, aluminothermic reduction 0.5h is carried out to ilmenite in ice crystal ground mass fused-salt medium in 985 DEG C,
Ilmenite component is according to mass percent：48.68%TiO2,36.78%FeO, 10.97%Fe2O3,0.05%CaO,
1.18%MgO, 0.67%SiO2,0.60%Al2O3, surplus are impurity, after reaction separate alloy and fused salt, obtain
The ice crystal ground mass fused salt of Al-Ti-Fe alloys and richness Al2O3, Al-Ti-Fe alloys contain Al 71.10%, Ti by mass percentage
12.42%, Fe 9.03%, Si 1.45%；
Wherein, the ice crystal ground mass fused salt of rich Al2O3 is electrolysed in 985 DEG C, using Fe-Ni alloy/C as anode, molten aluminum is
Cathode, control electrolytic process cathode and anodic current density in 1.2A/cm2, obtain metallic aluminium in cathode, Al in metallic aluminium
Quality purity is 96.12%, and containing Ti 1.35%, Fe 2.47%, oxygen is obtained in anode.
The dosage of the metal al reducing agent is 3 times of theoretical reduction agent dosage molal quantity needed for former ilmenite.
The addition of the ilmenite is the 3% of ilmenite and ice crystal ground mass fused salt gross mass.
The molar ratio of NaF and AlF3 is 2.8 in the ice crystal ground mass fused salt：1.
Embodiment 6
Using metallic aluminium as reducing agent, aluminothermic reduction 1h, titanium are carried out to ilmenite in ice crystal ground mass fused-salt medium in 930 DEG C
Iron ore component is 47.00%TiO2,40.95%FeO, 5.60%Fe2O3,0.81%CaO, 1.54% according to mass percent
MgO, 1.67%SiO2,1.23%Al2O3, surplus are impurity, after reaction separate alloy and fused salt, obtain Al-Ti-Fe
The ice crystal ground mass fused salt of alloy and richness Al2O3, Al-Ti-Fe alloys contain Al 78.11%, Ti 15.48% by mass percentage,
Fe 5.03%, Si 1.38%；
Wherein, the ice crystal ground mass fused salt of rich Al2O3 is electrolysed in 930 DEG C, using Fe-Ni-Al2O3 cermets as sun
Pole, molten aluminum are cathode, control electrolytic process cathode and anodic current density in 0.4A/cm2, obtain metallic aluminium in cathode, gold
The quality purity for belonging to Al in aluminium is 96.28%, and containing Ti 1.11%, Fe 2.56%, oxygen is obtained in anode.
The dosage of the metal al reducing agent is 3 times of theoretical reduction agent dosage molal quantity needed for former ilmenite.
The addition of the ilmenite is the 1% of ilmenite and ice crystal ground mass fused salt gross mass.
The molar ratio of NaF and AlF3 is 2.0 in the ice crystal ground mass fused salt：1.
Embodiment 7
Using metallic aluminium as reducing agent, aluminothermic reduction 3h, titanium are carried out to ilmenite in ice crystal ground mass fused-salt medium in 955 DEG C
Iron ore component is 47.74%TiO2,33.93%FeO, 7.66%Fe2O3,1.16%CaO, 4.60% according to mass percent
MgO, 2.64%SiO2,1.20%Al2O3, surplus are impurity, after reaction separate alloy and fused salt, obtain Al-Ti-Fe
The ice crystal ground mass fused salt of alloy and richness Al2O3, Al-Ti-Fe alloys contain Al 60.12%, Ti 34.05% by mass percentage,
Fe 3.15%, Si 2.68%；
Wherein, the ice crystal ground mass fused salt of rich Al2O3 is electrolysed in 955 DEG C, using Fe-Ni-Al2O3 cermets as sun
Pole, molten aluminum are cathode, control electrolytic process cathode and anodic current density in 0.6A/cm2, obtain metallic aluminium in cathode, gold
The quality purity for belonging to Al in aluminium is Al 95.12%, and containing Ti 0.91%, Fe 3.68%, oxygen is obtained in anode.
The dosage of the metal al reducing agent is 3 times of theoretical reduction agent dosage molal quantity needed for former ilmenite.
The addition of the middle ilmenite is the 2% of ilmenite and ice crystal ground mass fused salt gross mass.
The molar ratio of NaF and AlF3 is 2.2 in ice crystal ground mass fused salt in described：1.
Embodiment 8
Using metallic aluminium as reducing agent, aluminothermic reduction 6h, titanium are carried out to ilmenite in ice crystal ground mass fused-salt medium in 965 DEG C
Iron ore component is 48.67%TiO2,35.76%FeO, 10.63%Fe2O3,0.79%CaO, 0.20% according to mass percent
MgO, 0.70%SiO2,1.05%Al2O3, surplus are impurity, after reaction separate alloy and fused salt, obtain Al-Ti-Fe
The ice crystal ground mass fused salt of alloy and richness Al2O3, Al-Ti-Fe alloys contain Al 59.44%, Ti 36.62% by mass percentage,
Fe 2.62%, Si 1.32%；
Wherein, the ice crystal ground mass fused salt of rich Al2O3 is electrolysed in 965 DEG C, using Fe-Ni-Al2O3 cermets as sun
Pole, molten aluminum are cathode, control electrolytic process cathode and anodic current density in 0.8A/cm2, obtain metallic aluminium in cathode, gold
The quality purity for belonging to Al in aluminium is Al 98.78%, and containing Ti 0.23%, Fe 0.89%, oxygen is obtained in anode.
The dosage of the metal al reducing agent is 4 times of theoretical reduction agent dosage molal quantity needed for former ilmenite.
The addition of the ilmenite is the 4% of ilmenite and ice crystal ground mass fused salt gross mass.
The molar ratio of NaF and AlF3 is 2.4 in the ice crystal ground mass fused salt：1.
Embodiment 9
Using metallic aluminium as reducing agent, aluminothermic reduction 5h, titanium are carried out to ilmenite in ice crystal ground mass fused-salt medium in 975 DEG C
Iron ore component is 61.65%TiO2,5.78%FeO, 29.30%Fe2O3,0.10%CaO, 0.12% according to mass percent
MgO, 0.77%SiO2,1.15%Al2O3, surplus are impurity, after reaction separate alloy and fused salt, obtain Al-Ti-Fe
The ice crystal ground mass fused salt of alloy and richness Al2O3, Al-Ti-Fe alloys contain Al 70.44%, Ti 23.22% by mass percentage,
Fe 4.58%, Si 1.76%；
Wherein, the ice crystal ground mass fused salt of rich Al2O3 is electrolysed in 975 DEG C, using Fe-Ni-Al2O3 cermets as sun
Pole, molten aluminum are cathode, control electrolytic process cathode and anodic current density in 1.0A/cm2, obtain metallic aluminium in cathode, gold
The quality purity for belonging to Al in aluminium is Al 98.23%, and containing Ti 0.56%, Fe 1.13%, oxygen is obtained in anode.
The dosage of the metal al reducing agent is 4 times of theoretical reduction agent dosage molal quantity needed for former ilmenite.
The addition of the ilmenite is the 5% of ilmenite and ice crystal ground mass fused salt gross mass.
The molar ratio of NaF and AlF3 is 2.6 in the ice crystal ground mass fused salt：1.
Embodiment 10
Using metallic aluminium as reducing agent, aluminothermic reduction 4h, titanium are carried out to ilmenite in ice crystal ground mass fused-salt medium in 985 DEG C
Iron ore component is 50.44%TiO2,37.39%FeO, 9.06%Fe2O3,0.10%CaO, 0.10% according to mass percent
MgO, 0.79%SiO2,0.75%Al2O3, surplus are impurity, after reaction separate alloy and fused salt, obtain Al-Ti-Fe
The ice crystal ground mass fused salt of alloy and richness Al2O3, Al-Ti-Fe alloys contain Al 77.29%, Ti 13.74% by mass percentage,
Fe 7.61%, Si 1.36%；
Wherein, the ice crystal ground mass fused salt of rich Al2O3 is electrolysed in 985 DEG C, using Fe-Ni-Al2O3 cermets as sun
Pole, molten aluminum are cathode, control electrolytic process cathode and anodic current density in 1.2A/cm2, obtain metallic aluminium in cathode, gold
The quality purity for belonging to Al in aluminium is Al 97.68%, contains 1.42%, Fe 2.11%, oxygen is obtained in anode.
The dosage of the metal al reducing agent is 4 times of theoretical reduction agent dosage molal quantity needed for former ilmenite.
The addition of the ilmenite is the 6% of ilmenite and ice crystal ground mass fused salt gross mass.
The molar ratio of NaF and AlF3 is 2.8 in the ice crystal ground mass fused salt：1.
Claims (5)
1. a kind of method that aluminothermic reduction ilmenite prepares Al-Ti-Fe alloys in ice crystal ground mass fused salt, it is characterised in that according to
Lower step carries out：
Using metallic aluminium as reducing agent, aluminothermic reduction 0.5- is carried out to ilmenite in ice crystal ground mass fused-salt medium in 930-985 DEG C
6h, then alloy and fused salt are separated, obtain the ice crystal ground mass fused salt of Al-Ti-Fe alloys and richness Al2O3, wherein Al-Ti-Fe
Alloy contain by weight percentage 59.44~83.55%Al, 12.42~36.62%Ti, 0.41~9.03%Fe, 0.87~
2.68%Si.
2. aluminothermic reduction ilmenite prepares the side of Al-Ti-Fe alloys in a kind of ice crystal ground mass fused salt according to claim 1
Method, it is characterised in that the dosage of the metal al reducing agent is 2 of theoretical reduction agent dosage molal quantity needed for reduced ilmenite
~5 times.
3. aluminothermic reduction ilmenite prepares the side of Al-Ti-Fe alloys in a kind of ice crystal ground mass fused salt according to claim 1
Method, it is characterised in that the addition of the ilmenite is the 2~6% of ilmenite and ice crystal ground mass fused salt gross mass.
4. aluminothermic reduction ilmenite prepares the side of Al-Ti-Fe alloys in a kind of ice crystal ground mass fused salt according to claim 1
Method, it is characterised in that the ice crystal ground mass molten salt composition contain by weight percentage 15~75%NaF, 10~50%AlF3,0~
5%CaF2,0~5%LiF, the molar ratio of 0~5%MgF2, wherein NaF and AlF3 are (2.0-2.8)：1.
5. aluminothermic reduction ilmenite prepares the side of Al-Ti-Fe alloys in a kind of ice crystal ground mass fused salt according to claim 1
Method, it is characterised in that the ice crystal ground mass fused salt of the rich Al2O3 is electrolysed in 930-985 DEG C, with Fe-Ni alloy/C or Fe-
Ni-Al2O3 cermets are anode, and molten aluminum is cathode, control electrolytic process cathode and anodic current density 0.4~
1.2A/cm2, metallic aluminium is obtained in cathode, and oxygen is obtained in anode, wherein the purity by weight of metallic aluminium for 95.07~
98.78%, impurity is mainly 0.89~3.68%Fe and 0.23~2.53%Ti.
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| CN110551907A (en) * | 2019-10-12 | 2019-12-10 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for preparing vanadium-titanium alloy by using refined tailings |
| CN111285385A (en) * | 2020-02-18 | 2020-06-16 | 大同碳谷科技孵化器有限公司 | Method for extracting aluminum oxide and silicon dioxide from coal gangue ash |
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| CN104561550A (en) * | 2014-12-25 | 2015-04-29 | 东北大学 | Method for preparing Al-Ti-Fe alloy through thermal reduction of ilmenite in cryolite-based molten salt |
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| CN104561550A (en) * | 2014-12-25 | 2015-04-29 | 东北大学 | Method for preparing Al-Ti-Fe alloy through thermal reduction of ilmenite in cryolite-based molten salt |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110551907A (en) * | 2019-10-12 | 2019-12-10 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for preparing vanadium-titanium alloy by using refined tailings |
| CN111285385A (en) * | 2020-02-18 | 2020-06-16 | 大同碳谷科技孵化器有限公司 | Method for extracting aluminum oxide and silicon dioxide from coal gangue ash |
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