CA2954871C - Method for converting and separating vanadium, titanium, and iron from vanadium-titanium-iron concentrate - Google Patents
Method for converting and separating vanadium, titanium, and iron from vanadium-titanium-iron concentrate Download PDFInfo
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- CA2954871C CA2954871C CA2954871A CA2954871A CA2954871C CA 2954871 C CA2954871 C CA 2954871C CA 2954871 A CA2954871 A CA 2954871A CA 2954871 A CA2954871 A CA 2954871A CA 2954871 C CA2954871 C CA 2954871C
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- 229910052720 vanadium Inorganic materials 0.000 title claims abstract description 122
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 title claims abstract description 122
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 97
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 title claims abstract description 83
- 239000010936 titanium Substances 0.000 title claims abstract description 83
- 229910052719 titanium Inorganic materials 0.000 title claims abstract description 83
- 238000000034 method Methods 0.000 title claims abstract description 54
- MRHSJWPXCLEHNI-UHFFFAOYSA-N [Ti].[V].[Fe] Chemical compound [Ti].[V].[Fe] MRHSJWPXCLEHNI-UHFFFAOYSA-N 0.000 title claims abstract description 53
- 239000012141 concentrate Substances 0.000 title claims abstract description 52
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 48
- 239000002893 slag Substances 0.000 claims abstract description 75
- 229910000805 Pig iron Inorganic materials 0.000 claims abstract description 41
- GFNGCDBZVSLSFT-UHFFFAOYSA-N titanium vanadium Chemical compound [Ti].[V] GFNGCDBZVSLSFT-UHFFFAOYSA-N 0.000 claims abstract description 28
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 9
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 6
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 28
- 239000000203 mixture Substances 0.000 claims description 25
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 22
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 13
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 11
- 235000017550 sodium carbonate Nutrition 0.000 claims description 11
- 238000001914 filtration Methods 0.000 claims description 10
- 238000002386 leaching Methods 0.000 claims description 10
- 239000007787 solid Substances 0.000 claims description 10
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 claims description 6
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 6
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 5
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 claims description 5
- 239000003830 anthracite Substances 0.000 claims description 5
- 239000000571 coke Substances 0.000 claims description 5
- 239000011734 sodium Substances 0.000 claims description 5
- 229910052708 sodium Inorganic materials 0.000 claims description 5
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims description 4
- 229910052938 sodium sulfate Inorganic materials 0.000 claims description 4
- 235000011152 sodium sulphate Nutrition 0.000 claims description 4
- 239000002802 bituminous coal Substances 0.000 claims description 3
- 229910021538 borax Inorganic materials 0.000 claims description 3
- 239000003077 lignite Substances 0.000 claims description 3
- 235000017557 sodium bicarbonate Nutrition 0.000 claims description 3
- 229910000030 sodium bicarbonate Inorganic materials 0.000 claims description 3
- 239000011780 sodium chloride Substances 0.000 claims description 3
- 235000002639 sodium chloride Nutrition 0.000 claims description 3
- 235000010339 sodium tetraborate Nutrition 0.000 claims description 3
- BSVBQGMMJUBVOD-UHFFFAOYSA-N trisodium borate Chemical compound [Na+].[Na+].[Na+].[O-]B([O-])[O-] BSVBQGMMJUBVOD-UHFFFAOYSA-N 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 2
- 235000011121 sodium hydroxide Nutrition 0.000 claims description 2
- 238000011084 recovery Methods 0.000 abstract description 31
- 230000008569 process Effects 0.000 abstract description 27
- 238000000926 separation method Methods 0.000 abstract description 18
- 238000006243 chemical reaction Methods 0.000 abstract description 11
- 238000003912 environmental pollution Methods 0.000 abstract description 5
- 230000009467 reduction Effects 0.000 abstract description 5
- 238000002844 melting Methods 0.000 abstract description 4
- 159000000000 sodium salts Chemical class 0.000 abstract description 4
- 238000003723 Smelting Methods 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000000227 grinding Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000008878 coupling Effects 0.000 abstract description 2
- 238000010168 coupling process Methods 0.000 abstract description 2
- 238000005859 coupling reaction Methods 0.000 abstract description 2
- 229910001608 iron mineral Inorganic materials 0.000 abstract description 2
- 230000008018 melting Effects 0.000 abstract description 2
- 239000000126 substance Substances 0.000 description 9
- PNXOJQQRXBVKEX-UHFFFAOYSA-N iron vanadium Chemical compound [V].[Fe] PNXOJQQRXBVKEX-UHFFFAOYSA-N 0.000 description 5
- 239000000284 extract Substances 0.000 description 3
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 235000010755 mineral Nutrition 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 101100438378 Neurospora crassa (strain ATCC 24698 / 74-OR23-1A / CBS 708.71 / DSM 1257 / FGSC 987) fac-1 gene Proteins 0.000 description 1
- 108091006629 SLC13A2 Proteins 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/20—Treatment or purification of solutions, e.g. obtained by leaching
- C22B3/22—Treatment or purification of solutions, e.g. obtained by leaching by physical processes, e.g. by filtration, by magnetic means, or by thermal decomposition
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/04—Extraction of metal compounds from ores or concentrates by wet processes by leaching
-
- 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
- C22B34/1204—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 preliminary treatment of ores or scrap to eliminate non- titanium constituents, e.g. iron, without attacking the titanium constituent
- C22B34/1209—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 preliminary treatment of ores or scrap to eliminate non- titanium constituents, e.g. iron, without attacking the titanium constituent by dry processes, e.g. with selective chlorination of iron or with formation of a titanium bearing slag
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B34/00—Obtaining refractory metals
- C22B34/20—Obtaining niobium, tantalum or vanadium
- C22B34/22—Obtaining vanadium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B5/00—General methods of reducing to metals
- C22B5/02—Dry methods smelting of sulfides or formation of mattes
- C22B5/08—Dry methods smelting of sulfides or formation of mattes by sulfides; Roasting reaction methods
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The present invention relates to a method for converting and separating vanadium, titanium, and iron from the vanadium-titanium-iron concentrate in one step, which includes the steps as below. (1) The vanadium-titanium-iron concentrate is mixed and roasted together with addition agent and reducing agent, and thereby vanadium- containing pig iron and vanadium enriched slag are obtained. (2) The vanadium titanium enriched slag is leached in water and filtered, and thereby vanadium-containing solution and titanium slag are obtained. The technical features of the present invention are as below. By the new process of sodium salt roasting and reduction coupling, a new system of low- temperature smelting multiphase reaction separation is constructed. The reduction of iron, sodiumizing of vanadium, and the melting separation process of the vanadium titanium enriched slag and the iron are achieved in one step. Three products, i.e., the vanadium- containing pig iron, the vanadium-containing solution, and the titanium slag are produced. Compared with the conventional "blast furnace-converter" or "direct reduction-melting separation/grinding beneficiation" processes, the present invention has the significant advantages of a short process, a low investment, a low production cost, a reduced environmental pollution, and a high comprehensive recovery rate. A new technology of efficient and comprehensive utilization of vanadium-titanium-iron mineral resources is provided, which has a wide application prospect.
Description
METHOD FOR CONVERTING AND SEPARATING VANADIUM, TITANIUM, AND IRON FROM VANADIUM-TITANIUM-IRON
CONCENTRATE
TECHNICAL FIELD
The present invention relates to the field of comprehensive utilization of metallurgical technology and mineral resources, in particular, to a method for converting and separating the vanadium, the titanium, and the iron from the vanadium-titanium-iron concentrate in one step.
BACKGROUND
Around the world, nowadays, the methods of utilizing the vanadium-titanium-iron concentrate are as below. (1) The process of blast furnace-converter can only extract the iron and a part of vanadium, while the titanium enters the blast furnace slag and cannot be effectively and economically recovered and utilized. A large amount of blast furnace titanium slag that is additionally produced causes a huge drain of titanium resources and serious environmental pollution. (2) In the process of rotary hearth furnace-electrical furnace, the vanadium-bearing titano-magnetite is firstly pre-reduced in a rotary hearth furnace, and then is melted and separated by the electrical furnace, such that hot metal and the titanium enriched slag are obtained. However, the location of vanadium is hard to control, and the utilization rate of the vanadium is not high. Also, the mineral phase of the melting-separated titanium slag is stable, and has a compact structure. There is no mature process to deal with melting-separated titanium slag at present. Only a small amount of melting-separated titanium slag is used as a raw material to produce titanium dioxide pigment in sulfate process. (3)The process of direct reduction and grinding beneficiation achieves the separation of iron and vanadium-titanium, and obtains iron powder and vanadium-titanium enriched slag. The vanadium-titanium enriched slag is further subjected to the process of sodium salt roasting. The vanadium is extracted by water leaching. The vanadium solution and the titanium enriched slag are obtained. (4) In the process which firstly extracts the vanadium, the vanadium-titanium-iron concentrate firstly is subjected to
CONCENTRATE
TECHNICAL FIELD
The present invention relates to the field of comprehensive utilization of metallurgical technology and mineral resources, in particular, to a method for converting and separating the vanadium, the titanium, and the iron from the vanadium-titanium-iron concentrate in one step.
BACKGROUND
Around the world, nowadays, the methods of utilizing the vanadium-titanium-iron concentrate are as below. (1) The process of blast furnace-converter can only extract the iron and a part of vanadium, while the titanium enters the blast furnace slag and cannot be effectively and economically recovered and utilized. A large amount of blast furnace titanium slag that is additionally produced causes a huge drain of titanium resources and serious environmental pollution. (2) In the process of rotary hearth furnace-electrical furnace, the vanadium-bearing titano-magnetite is firstly pre-reduced in a rotary hearth furnace, and then is melted and separated by the electrical furnace, such that hot metal and the titanium enriched slag are obtained. However, the location of vanadium is hard to control, and the utilization rate of the vanadium is not high. Also, the mineral phase of the melting-separated titanium slag is stable, and has a compact structure. There is no mature process to deal with melting-separated titanium slag at present. Only a small amount of melting-separated titanium slag is used as a raw material to produce titanium dioxide pigment in sulfate process. (3)The process of direct reduction and grinding beneficiation achieves the separation of iron and vanadium-titanium, and obtains iron powder and vanadium-titanium enriched slag. The vanadium-titanium enriched slag is further subjected to the process of sodium salt roasting. The vanadium is extracted by water leaching. The vanadium solution and the titanium enriched slag are obtained. (4) In the process which firstly extracts the vanadium, the vanadium-titanium-iron concentrate firstly is subjected to
2 the process of sodium salt roasting and water leaching extraction of vanadium.
Next, the iron making proccss with the blast furnace or the non-blast furnace is conducted. After the vanadium extraction, since the content of residual sodium is high, the smooth conduction of the process of iron making is negatively affected. Also, the obtained titanium slag still cannot be utilized as in above processes. Moreover, these processes require conducting two or three high-temperature steps to achieve the effective separation of the iron, the vanadium, and the titanium. There are defects of a long process, a high investment, a high cost, serious pollution, and a low comprehensive utilization degree. In view of the above, no matter what kind of usage is conducted, the recovering and utilization of the iron, the vanadium, and the titanium from the vanadium-bearing titano-magnetite cannot be achieved simultaneously, which causes a waste of resources. The present invention provides a new method for converting and separating the vanadium, the titanium, and the iron from the vanadium-titanium-iron concentrate in one step. An efficient and clean recovery of the vanadium, the titanium, and the iron is achieved. The method has the significant advantages of the short process, low investment, low production cost, reduced environmental pollution, the efficiency of comprehensive recovery, and has a wide application prospect.
SUMMARY
Regarding the defects of the existing processes that include two or three steps to make comprehensive utilization of the vanadium-tit9nium-iron concentrate, the present invention develops a method for converting and separating vanadium, titanium, and iron from vanadium-titanium-iron concentrate in one step. Meanwhile, the method has the significant advantages of reduced environmental pollution, high comprehensive recovery rate, and has a wide application prospect.
The method for converting and separating vanadium, titanium, and iron from the vanadium-titanium-iron concentrate in one step provided by the present invention includes the following steps.
(1)The vanadium-titanium-iron concentrate is mixed with an addition agent and a reducing agent. Roasting is conducted for 0.5-4 hours at the temperature of 1100-1400 C, so that the vanadium-containing pig iron and the vanadium titanium enriched slag are
Next, the iron making proccss with the blast furnace or the non-blast furnace is conducted. After the vanadium extraction, since the content of residual sodium is high, the smooth conduction of the process of iron making is negatively affected. Also, the obtained titanium slag still cannot be utilized as in above processes. Moreover, these processes require conducting two or three high-temperature steps to achieve the effective separation of the iron, the vanadium, and the titanium. There are defects of a long process, a high investment, a high cost, serious pollution, and a low comprehensive utilization degree. In view of the above, no matter what kind of usage is conducted, the recovering and utilization of the iron, the vanadium, and the titanium from the vanadium-bearing titano-magnetite cannot be achieved simultaneously, which causes a waste of resources. The present invention provides a new method for converting and separating the vanadium, the titanium, and the iron from the vanadium-titanium-iron concentrate in one step. An efficient and clean recovery of the vanadium, the titanium, and the iron is achieved. The method has the significant advantages of the short process, low investment, low production cost, reduced environmental pollution, the efficiency of comprehensive recovery, and has a wide application prospect.
SUMMARY
Regarding the defects of the existing processes that include two or three steps to make comprehensive utilization of the vanadium-tit9nium-iron concentrate, the present invention develops a method for converting and separating vanadium, titanium, and iron from vanadium-titanium-iron concentrate in one step. Meanwhile, the method has the significant advantages of reduced environmental pollution, high comprehensive recovery rate, and has a wide application prospect.
The method for converting and separating vanadium, titanium, and iron from the vanadium-titanium-iron concentrate in one step provided by the present invention includes the following steps.
(1)The vanadium-titanium-iron concentrate is mixed with an addition agent and a reducing agent. Roasting is conducted for 0.5-4 hours at the temperature of 1100-1400 C, so that the vanadium-containing pig iron and the vanadium titanium enriched slag are
3 achieved, wherein the ratio by weight is vanadium-titanium-iron concentrate:
addition agent: reducing agent-- 100: (40-80): (20-50).
(2) The vanadium titanium enriched slag obtained in the step (1) is leached in water and filtered, and thereby the vanadium-containing solution and the titanium slag are obtained.
The method according to claim 1 is characterized in that the vanadium-titanium-iron concentrate in the step (1) can be any type of vanadium-titanium-iron concentrate known in the art. The major compositions include the iron with a total mass fraction of 30%-60%, V205 with a mass fraction of 0.15%-5.0%, and TiO2 with a mass fraction of 5%-35%.
= In the method according to the present invention, the addition agent of step (1) is one item or a mixture of more than one items selected from a group consisting of sodium carbonate, sodium hydroxide, sodium sulfate, sodium chloride, sodium borate, and sodium bicarbonate.
In the method according to the present invention, the reducing agent of the step (1) is one item or a mixture of more than one items selected from a group consisting of anthracite, bituminous coal, brown coal, and coke.
In the method according to the present invention, the vanadium-containing pig iron in the step (1) has an iron mass fraction of 90%-99%, and a vanadium mass fraction of 0.05%4%.
The method according to the present invention, preferably, the leaching liquid-solid mass ratio in the step (2) is 1:1-5:1, and the leaching temperature is 30-100 C, and the leaching time is 0.5-4 hours.
The technical processes in the prior art need to conduct two or even three high-temperature steps to achieve the separation of vanadium, titanium, and iron.
Specifically, the process of blast furnace-converter can only extract the iron and a part of vanadium, while the titanium enters the blast furnace slag and cannot be effectively and economically recovered. In the process of the direct reduction-electric furnace, the whereabouts of vanadium is hard to control, and the titanium slag is hard to be utilized.
There are problems of long process and low recovery rate of the valuable components.
The technical features of the present invention are as below. By the new process of sodium salt roasting and reduction coupling, a new system of low-temperature smelting multiphase reaction separation is constructed. The reduction of iron, the sodiumizing of
addition agent: reducing agent-- 100: (40-80): (20-50).
(2) The vanadium titanium enriched slag obtained in the step (1) is leached in water and filtered, and thereby the vanadium-containing solution and the titanium slag are obtained.
The method according to claim 1 is characterized in that the vanadium-titanium-iron concentrate in the step (1) can be any type of vanadium-titanium-iron concentrate known in the art. The major compositions include the iron with a total mass fraction of 30%-60%, V205 with a mass fraction of 0.15%-5.0%, and TiO2 with a mass fraction of 5%-35%.
= In the method according to the present invention, the addition agent of step (1) is one item or a mixture of more than one items selected from a group consisting of sodium carbonate, sodium hydroxide, sodium sulfate, sodium chloride, sodium borate, and sodium bicarbonate.
In the method according to the present invention, the reducing agent of the step (1) is one item or a mixture of more than one items selected from a group consisting of anthracite, bituminous coal, brown coal, and coke.
In the method according to the present invention, the vanadium-containing pig iron in the step (1) has an iron mass fraction of 90%-99%, and a vanadium mass fraction of 0.05%4%.
The method according to the present invention, preferably, the leaching liquid-solid mass ratio in the step (2) is 1:1-5:1, and the leaching temperature is 30-100 C, and the leaching time is 0.5-4 hours.
The technical processes in the prior art need to conduct two or even three high-temperature steps to achieve the separation of vanadium, titanium, and iron.
Specifically, the process of blast furnace-converter can only extract the iron and a part of vanadium, while the titanium enters the blast furnace slag and cannot be effectively and economically recovered. In the process of the direct reduction-electric furnace, the whereabouts of vanadium is hard to control, and the titanium slag is hard to be utilized.
There are problems of long process and low recovery rate of the valuable components.
The technical features of the present invention are as below. By the new process of sodium salt roasting and reduction coupling, a new system of low-temperature smelting multiphase reaction separation is constructed. The reduction of iron, the sodiumizing of
4 vanadium, and the melting separation process of the vanadium titanium enriched slag and the iron is achieved in one step. Three products, i.e., vanadium-containing pig iron, vanadium-containing solution, and titanium slag are produced. A new, efficient, and economical process of comprehensive utilization of vanadium-titanium-iron concentrate is created.
Compared with the traditional "blast furnace-converter" or "direct reduction-melting separation/grinding beneficiation" processes, the present invention has the significant advantages of a short process, a low investment, a low production cost, little environmental pollution, and a high comprehensive recovery rate. A new technology of efficient and comprehensive utilization of vanadium-titanium-iron mineral resources is provided, which has a wide application prospect.
According to an aspect of the invention, there is provided a method for converting and separating vanadium, titanium, and iron from vanadium-titanium-iron concentrate, comprising:
(1) Mixing the vanadium-titanium-iron concentrate with an addition agent containing sodium element and a reducing agent, conducting roasting, so that vanadium-contained containing pig iron and vanadium titanium enriched slag are obtained, wherein a ratio by weight is vanadium-titanium-iron concentrate: addition agent containing sodium element: reducing agent = 100:
(40-80): (20-50); (2) Leaching the vanadium titanium enriched slag obtained in the step (1) in water, conducting filtering, such that a vanadium-containing solution and a titanium slag are obtained.
The specific advantages of the present invention are as below.
(1) The present invention provides a new method for converting and separating vanadium, titanium, and iron from vanadium-titanium-iron concentrate in one step, avoiding problems of repeated high-temperature roasting, a high cost, and a serious pollution in the traditional smelting process of the vanadium-bearing titano-magnetite.
(2) The present invention provides a new method for converting and separating vanadium, titanium, and iron from the vanadium-titanium-iron concentrate in one step.
The recovery rates of the iron, the vanadium, and the titanium are high. The iron is produced as vanadium-containing pig iron which has a high additional value, and the obtained titanium slag has good acid soluble ability.
4a BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 is the process flow chart of the method for converting and separating vanadium, titanium, and iron from vanadium-titanium-iron concentrate in one step of the present invention.
DETAILED DESCRIPTION
Further description of the present invention in conjunction with specific embodiments will be described as below.
Embodiment 1 100 parts of 1 # vanadium-titanium-iron concentrate, 40 parts of sodium carbonate, and parts of anthracite are well mixed. Then, the mixture is kept for 3 hours in a muffle furnace at temperature of 1200 C. Vanadium-containing pig iron and vanadium titanium enriched slag are obtained. The vanadium titanium enriched slag is crushed and finely grounded, and is leached for 2 hours under the condition of 30 C and a liquid-solid mass ratio of 2:1. Filtering is conducted, after which the vanadium-containing solution and the titanium enriched slag are obtained. The chemical compositions of the vanadium-titanium-iron concentrate are shown in table 1. The separating results of the vanadium-containing pig iron, the vanadium-containing solution, and the titanium enriched slag are shown in table 2. The iron grade of the obtained vanadium-containing pig iron is 97.62%, and the recovery rate is up to 99.40%. The concentration of the vanadium-containing solution V205 is 3.2 g/L, and the recovery rate of vanadium is 70.46%. The TiO2 grade of the titanium enriched slag is 35.67%, and the recovery rate of titanium is 99.77%.
The conversion and separation of iron, vanadium, and titanium from vanadium-titanium-iron concentrate are well achieved.
Embodiment 2 100 parts of 2 # vanadium-titanium-iron concentrate, 60 parts of sodium bicarbonate and 30 parts of coke are well mixed. Then, the mixture is kept for 4 hours in a muffle furnace at temperature of 1100 C. The vanadium-containing pig iron and vanadium titanium enriched slag are obtained. The vanadium titanium enriched slag is crushed and finely grounded, and is leached for 2 hours under the condition of 30 C and a liquid-solid mass ratio of 1:1. Filtering is conducted, after which the vanadium-containing solution and the titanium enriched slag are obtained. The chemical compositions of vanadium-titanium-iron concentrate are shown in table 1. The separating results of the vanadium-containing pig iron, the vanadium-containing solution, and the titanium enriched slag are shown in table 2. The iron grade of the obtained vanadium-containing pig iron is 95.38%, and the recovery rate is up to 98.71%. The concentration of the vanadium-containing solution V205 is 5.2 g/L, and the recovery rate of vanadium is 90.50%. The TiO2 grade of the titanium enriched slag is 42.67%, and the recovery rate of titanium is 99.54%.
The conversion and separation of iron, vanadium, and titanium from vanadium-titanium-iron concentrate are well achieved.
Embodiment 3 100 parts of 3 # vanadium-titanium-iron concentrate, 70 parts of sodium sulfate, and 40 parts of bituminous coal are well mixed. Then, the mixture is kept for half an hour in a muffle furnace at temperature of 1300 C. Vanadium-containing pig iron and vanadium titanium enriched slag are obtained. The vanadium titanium enriched slag is crushed and finely grounded, and is leached for half an hour under the condition of 100 C
and a liquid-solid mass ratio of 4:1. Filtering is conducted, after which the vanadium-containing solution and the titanium enriched slag are obtained. The chemical compositions of vanadium-titanium-iron concentrate are shown in table 1. The separating results of the vanadium-containing pig iron, the vanadium-containing solution, and the titanium enriched slag are shown in table 2. The iron grade of the obtained vanadium-containing pig iron is 96.54%, and the recovery rate is up to 99.10%. The concentration of the vanadium-containing solution V205 is 4.5 g/L, and the recovery rate of vanadium is 88.56%. The TiO2 grade of the titanium enriched material is 39.52%, and the recovery rate of titanium is 99.61%. The conversion and separation of iron, vanadium, and titanium from vanadium-titanium-iron concentrate are well achieved.
Embodiment 4 100 parts of 4 # vanadium-titanium-iron concentrate, 80 parts of mixture of sodium carbonate and sodium sulfate (mol(Na2CO3/NaC1)=1:1), and 40 parts of brown coal are well mixed. Then, the mixture is kept for 2 hours in a muffle furnace at temperature of 1400 C. Vanadium-containing pig iron and vanadium titanium enriched slag are obtained.
The vanadium titanium enriched slag is crushed and finely grounded, and is leached for 1 hour under the condition of 90 C and a liquid-solid mass ratio of 3:1.
Filtering is conducted, after which the vanadium-containing solution and the titanium enriched slag are obtained. The chemical compositions of vanadium-titanium-iron concentrate are shown in table 1. The separating results of the vanadium-containing pig iron, the vanadium-containing solution, and the titanium enriched slag are shown in table 2. The iron grade of the obtained vanadium-containing pig iron is 97.38%, and the recovery rate is up to 99.85%. The concentration of the vanadium-containing solution V205 is 2.8 g/L, and the recovery rate of vanadium is 80.30%. The TiO2 grade of the titanium enriched slag is 46.69%, and the recovery rate of titanium is 99.74%. The conversion and separation of iron, vanadium, and titanium from vanadium-titanium-iron concentrate are well achieved.
Embodiment 5 100 parts of 5 # vanadium-titanium-iron concentrate, 50 parts of sodium hydroxide, and 30 parts of anthracite are well mixed. Then, the mixture is kept for 1 hour in a muffle furnace at temperature of 1250 C. The vanadium-containing pig iron and the vanadium titanium enriched slag are obtained. The vanadium titanium enriched slag is crushed and finely grounded, and is leached for 3 hours under the condition of 70 C and a liquid-solid mass ratio of 5:1. Filtering is conducted, after which the vanadium-containing solution and the titanium enriched slag are obtained. The chemical composition of vanadium-titanium-iron concentrate are shown in table 1. The separating result of the vanadium-containing pig iron, the vanadium-containing solution, and the titanium enriched slag are shown in table 2. The iron grade of the obtained vanadium-containing pig iron is 97.02%, and the recovery rate is up to 98.60%. The concentration of the vanadium-containing solution V205 is 4.1 g/L, and the recovery rate of vanadium is 86.22%. The TiO2 grade of the titanium enriched material is 48.12%, and the recovery rate of titanium is 99.73%. The conversion and separation of iron, vanadium, and titanium from vanadium-titanium-iron concentrate are well achieved.
Embodiment 6 100 parts of 6 # vanadium-titanium-iron concentrate, 70 parts of a mixture of sodium carbonate and sodium chloride (mol(Na2CO3/1\faC1)=1:1), and 30 parts of coke are well mixed. Then, the mixture is kept for 2 hours in a muffle furnace at temperature of 1300 C.
The vanadium-containing pig iron and the vanadium titanium enriched slag are obtained.
The vanadium titanium enriched slag is crushed and finely grounded, and is leached for 1 hour under the condition of 90 C and a liquid-solid mass ratio of 4:1.
Filtering is conducted, after which the vanadium-containing solution and the titanium enriched slag are obtained. The chemical composition of vanadium-titanium-iron concentrate are shown in table 1. The separating results of the vanadium-containing pig iron, the vanadium-containing solution, and the titanium enriched slag are shown in table 2. The iron grade of the obtained vanadium-containing pig iron is 98.12%, and the recovery rate is up to 99.85%. The concentration of the vanadium-containing solution V205 is 4.7 g/L, and the recovery rate of vanadium is 83.40%. The TiO2 grade of the titanium enriched slag is 40.67%, and the recovery rate of titanium is 99.01%. The conversion and separation of iron, vanadium and titanium from vanadium-titanium-iron concentrate are well achieved.
Embodiment 7 100 parts of 7 # vanadium-titanium-iron concentrate, 65 parts of a mixture of sodium carbonate and sodium borate (mol(Na2CO3/ Na2B407)=7:3), and 20 parts of coke are well mixed. Then, the mixture is kept for 3 hours in a muffle furnace at temperature of 1150 C.
The vanadium-containing pig iron and the vanadium titanium enriched slag are obtained.
The vanadium titanium enriched slag is crushed and finely grounded, and is leached for 4 hour under the condition of 100 C and a liquid-solid mass ratio of 3:L
Filtering is conducted, after which the vanadium-containing solution and the titanium enriched slag are obtained. The chemical composition of vanadium-titanium-iron concentrate are shown in table 1. The separating results of the vanadium-containing pig iron, the vanadium-containing solution, and the titanium enriched slag are shown in table 2. The iron grade of the obtained vanadium-containing pig iron is 91.28%, and - the recovery rate is up to 92.68%. The concentration of the vanadium-containing solution V205 is 8.5 g/L, and the recovery rate of vanadium is 89.45%. The TiO2 grade of the titanium enriched slag is 39.85%, and the recovery rate of titanium is 99.47%. The conversion and separation of iron, vanadium and titanium from vanadium-titanium-iron concentrate are well achieved.
Embodiment 8 100 parts of 8 # vanadium-titanium-iron concentrate, 50 parts of a mixture of sodium carbonate and sodium hydroxide (mol(Na2CO3/Na0H)=1:1), and 40 parts of anthracite are well mixed. Then, the mixture is kept for 1.5 hours in a muffle furnace at temperature of 1250 C. The vanadium-containing pig iron and the vanadium titanium enriched slag are obtained. The vanadium titanium enriched slag is crushed and finely grounded, and is leached for 4 hour under the condition of 90 C and a liquid-solid mass ratio of 2.5:1.
Filtering is conducted, after which the vanadium-containing solution and the titanium enriched slag are obtained. The chemical composition of vanadium-titanium-iron concentrate are shown in table 1. The separating results of the vanadium-containing pig iron, the vanadium-containing solution, and the titanium enriched slag are shown in table 2. The iron grade of the obtained vanadium-containing pig iron is 97.65%, and the recovery rate is up to 98.15%. The concentration of the vanadium-containing solution V205 is 11.8 g/L, and the recovery rate of vanadium is 89.58%. The TiO2 grade of the titanium enriched slag is 38.74%, and the recovery rate of titanium is 99.65%.
The conversion and separation of iron, vanadium and titanium from vanadium-titanium-iron concentrate are well achieved.
Table 1 Analysis of eight vanadium-titanium-iron concentrates in the embodiments /%
Ore sample TFe TiO2 V205 SiO2 A1203 CaO MgO
number 1 50.28 13.12 0.53 3.07 6.17 1.04 3.77 2 37.45 28.85 1.23 12.37 2.62 6.75 0.99 3 45.38 18.58 1.52 8.66 2.56 3.27 0.88 4 55.33 8.65 0.35 4.60 4.52 2.01 0.60 30.06 32.47 1.03 14.37 3.02 6.95 ' 1.29 6 59.58 6.23 1.86 2.13 2.65 1.01 0.57 7 48.18 25.22 3.89 7.56 1.89 2.01 2.11 8 50.15 18.18 4.90 3.58 3.68 1.09 0.85 Table 2 Reaction and separation results of the "one-step method"
of eight vanadium-titanium-iron concentrates in the embodiments Grade/% Recover"
Ore sample Product name number TFe TiO2 V205 Fe TiO2 V205 Vanadium-containing 97.62 0.20 0.21 99.40 0.23 19.35 Pig iron Vanadium-containing _ _ 3.2g/L - - 70.46 1 solution Titanium enriched 0.66 35.67 0.16 0.60 99.77 10.19 slag Vanadium-containing 95.38 0.32 0.24 98.71 0.46 5.42 Pig iron Vanadium-containing - - 5.2g/L - 90.50 2 solution Titanium enriched 0.81 42.67 0.25 1.29 99.54 4.08 slag Vanadium-containing 96.54 0.26 0.30 99.10 0.39 7.05 Pig iron Vanadium-containing 3 4.5g/L - 88.56 solution Titanium enriched 0.52 39.52 0.22 0.90 99.61 4.39 slag Vanadium-containing 97.38 0.25 0.52 99.85 0.26 15.82 Pig iron Vanadium-containing - - 2.8g/L - - 80.30 4 solution Titanium enriched 0.51 46.69 0.17 0.29 99.74 3.68 slag 1 Vanadium-containing 97.02 0.30 0.38 98.60 0.27 10.05 Pig iron
Compared with the traditional "blast furnace-converter" or "direct reduction-melting separation/grinding beneficiation" processes, the present invention has the significant advantages of a short process, a low investment, a low production cost, little environmental pollution, and a high comprehensive recovery rate. A new technology of efficient and comprehensive utilization of vanadium-titanium-iron mineral resources is provided, which has a wide application prospect.
According to an aspect of the invention, there is provided a method for converting and separating vanadium, titanium, and iron from vanadium-titanium-iron concentrate, comprising:
(1) Mixing the vanadium-titanium-iron concentrate with an addition agent containing sodium element and a reducing agent, conducting roasting, so that vanadium-contained containing pig iron and vanadium titanium enriched slag are obtained, wherein a ratio by weight is vanadium-titanium-iron concentrate: addition agent containing sodium element: reducing agent = 100:
(40-80): (20-50); (2) Leaching the vanadium titanium enriched slag obtained in the step (1) in water, conducting filtering, such that a vanadium-containing solution and a titanium slag are obtained.
The specific advantages of the present invention are as below.
(1) The present invention provides a new method for converting and separating vanadium, titanium, and iron from vanadium-titanium-iron concentrate in one step, avoiding problems of repeated high-temperature roasting, a high cost, and a serious pollution in the traditional smelting process of the vanadium-bearing titano-magnetite.
(2) The present invention provides a new method for converting and separating vanadium, titanium, and iron from the vanadium-titanium-iron concentrate in one step.
The recovery rates of the iron, the vanadium, and the titanium are high. The iron is produced as vanadium-containing pig iron which has a high additional value, and the obtained titanium slag has good acid soluble ability.
4a BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 is the process flow chart of the method for converting and separating vanadium, titanium, and iron from vanadium-titanium-iron concentrate in one step of the present invention.
DETAILED DESCRIPTION
Further description of the present invention in conjunction with specific embodiments will be described as below.
Embodiment 1 100 parts of 1 # vanadium-titanium-iron concentrate, 40 parts of sodium carbonate, and parts of anthracite are well mixed. Then, the mixture is kept for 3 hours in a muffle furnace at temperature of 1200 C. Vanadium-containing pig iron and vanadium titanium enriched slag are obtained. The vanadium titanium enriched slag is crushed and finely grounded, and is leached for 2 hours under the condition of 30 C and a liquid-solid mass ratio of 2:1. Filtering is conducted, after which the vanadium-containing solution and the titanium enriched slag are obtained. The chemical compositions of the vanadium-titanium-iron concentrate are shown in table 1. The separating results of the vanadium-containing pig iron, the vanadium-containing solution, and the titanium enriched slag are shown in table 2. The iron grade of the obtained vanadium-containing pig iron is 97.62%, and the recovery rate is up to 99.40%. The concentration of the vanadium-containing solution V205 is 3.2 g/L, and the recovery rate of vanadium is 70.46%. The TiO2 grade of the titanium enriched slag is 35.67%, and the recovery rate of titanium is 99.77%.
The conversion and separation of iron, vanadium, and titanium from vanadium-titanium-iron concentrate are well achieved.
Embodiment 2 100 parts of 2 # vanadium-titanium-iron concentrate, 60 parts of sodium bicarbonate and 30 parts of coke are well mixed. Then, the mixture is kept for 4 hours in a muffle furnace at temperature of 1100 C. The vanadium-containing pig iron and vanadium titanium enriched slag are obtained. The vanadium titanium enriched slag is crushed and finely grounded, and is leached for 2 hours under the condition of 30 C and a liquid-solid mass ratio of 1:1. Filtering is conducted, after which the vanadium-containing solution and the titanium enriched slag are obtained. The chemical compositions of vanadium-titanium-iron concentrate are shown in table 1. The separating results of the vanadium-containing pig iron, the vanadium-containing solution, and the titanium enriched slag are shown in table 2. The iron grade of the obtained vanadium-containing pig iron is 95.38%, and the recovery rate is up to 98.71%. The concentration of the vanadium-containing solution V205 is 5.2 g/L, and the recovery rate of vanadium is 90.50%. The TiO2 grade of the titanium enriched slag is 42.67%, and the recovery rate of titanium is 99.54%.
The conversion and separation of iron, vanadium, and titanium from vanadium-titanium-iron concentrate are well achieved.
Embodiment 3 100 parts of 3 # vanadium-titanium-iron concentrate, 70 parts of sodium sulfate, and 40 parts of bituminous coal are well mixed. Then, the mixture is kept for half an hour in a muffle furnace at temperature of 1300 C. Vanadium-containing pig iron and vanadium titanium enriched slag are obtained. The vanadium titanium enriched slag is crushed and finely grounded, and is leached for half an hour under the condition of 100 C
and a liquid-solid mass ratio of 4:1. Filtering is conducted, after which the vanadium-containing solution and the titanium enriched slag are obtained. The chemical compositions of vanadium-titanium-iron concentrate are shown in table 1. The separating results of the vanadium-containing pig iron, the vanadium-containing solution, and the titanium enriched slag are shown in table 2. The iron grade of the obtained vanadium-containing pig iron is 96.54%, and the recovery rate is up to 99.10%. The concentration of the vanadium-containing solution V205 is 4.5 g/L, and the recovery rate of vanadium is 88.56%. The TiO2 grade of the titanium enriched material is 39.52%, and the recovery rate of titanium is 99.61%. The conversion and separation of iron, vanadium, and titanium from vanadium-titanium-iron concentrate are well achieved.
Embodiment 4 100 parts of 4 # vanadium-titanium-iron concentrate, 80 parts of mixture of sodium carbonate and sodium sulfate (mol(Na2CO3/NaC1)=1:1), and 40 parts of brown coal are well mixed. Then, the mixture is kept for 2 hours in a muffle furnace at temperature of 1400 C. Vanadium-containing pig iron and vanadium titanium enriched slag are obtained.
The vanadium titanium enriched slag is crushed and finely grounded, and is leached for 1 hour under the condition of 90 C and a liquid-solid mass ratio of 3:1.
Filtering is conducted, after which the vanadium-containing solution and the titanium enriched slag are obtained. The chemical compositions of vanadium-titanium-iron concentrate are shown in table 1. The separating results of the vanadium-containing pig iron, the vanadium-containing solution, and the titanium enriched slag are shown in table 2. The iron grade of the obtained vanadium-containing pig iron is 97.38%, and the recovery rate is up to 99.85%. The concentration of the vanadium-containing solution V205 is 2.8 g/L, and the recovery rate of vanadium is 80.30%. The TiO2 grade of the titanium enriched slag is 46.69%, and the recovery rate of titanium is 99.74%. The conversion and separation of iron, vanadium, and titanium from vanadium-titanium-iron concentrate are well achieved.
Embodiment 5 100 parts of 5 # vanadium-titanium-iron concentrate, 50 parts of sodium hydroxide, and 30 parts of anthracite are well mixed. Then, the mixture is kept for 1 hour in a muffle furnace at temperature of 1250 C. The vanadium-containing pig iron and the vanadium titanium enriched slag are obtained. The vanadium titanium enriched slag is crushed and finely grounded, and is leached for 3 hours under the condition of 70 C and a liquid-solid mass ratio of 5:1. Filtering is conducted, after which the vanadium-containing solution and the titanium enriched slag are obtained. The chemical composition of vanadium-titanium-iron concentrate are shown in table 1. The separating result of the vanadium-containing pig iron, the vanadium-containing solution, and the titanium enriched slag are shown in table 2. The iron grade of the obtained vanadium-containing pig iron is 97.02%, and the recovery rate is up to 98.60%. The concentration of the vanadium-containing solution V205 is 4.1 g/L, and the recovery rate of vanadium is 86.22%. The TiO2 grade of the titanium enriched material is 48.12%, and the recovery rate of titanium is 99.73%. The conversion and separation of iron, vanadium, and titanium from vanadium-titanium-iron concentrate are well achieved.
Embodiment 6 100 parts of 6 # vanadium-titanium-iron concentrate, 70 parts of a mixture of sodium carbonate and sodium chloride (mol(Na2CO3/1\faC1)=1:1), and 30 parts of coke are well mixed. Then, the mixture is kept for 2 hours in a muffle furnace at temperature of 1300 C.
The vanadium-containing pig iron and the vanadium titanium enriched slag are obtained.
The vanadium titanium enriched slag is crushed and finely grounded, and is leached for 1 hour under the condition of 90 C and a liquid-solid mass ratio of 4:1.
Filtering is conducted, after which the vanadium-containing solution and the titanium enriched slag are obtained. The chemical composition of vanadium-titanium-iron concentrate are shown in table 1. The separating results of the vanadium-containing pig iron, the vanadium-containing solution, and the titanium enriched slag are shown in table 2. The iron grade of the obtained vanadium-containing pig iron is 98.12%, and the recovery rate is up to 99.85%. The concentration of the vanadium-containing solution V205 is 4.7 g/L, and the recovery rate of vanadium is 83.40%. The TiO2 grade of the titanium enriched slag is 40.67%, and the recovery rate of titanium is 99.01%. The conversion and separation of iron, vanadium and titanium from vanadium-titanium-iron concentrate are well achieved.
Embodiment 7 100 parts of 7 # vanadium-titanium-iron concentrate, 65 parts of a mixture of sodium carbonate and sodium borate (mol(Na2CO3/ Na2B407)=7:3), and 20 parts of coke are well mixed. Then, the mixture is kept for 3 hours in a muffle furnace at temperature of 1150 C.
The vanadium-containing pig iron and the vanadium titanium enriched slag are obtained.
The vanadium titanium enriched slag is crushed and finely grounded, and is leached for 4 hour under the condition of 100 C and a liquid-solid mass ratio of 3:L
Filtering is conducted, after which the vanadium-containing solution and the titanium enriched slag are obtained. The chemical composition of vanadium-titanium-iron concentrate are shown in table 1. The separating results of the vanadium-containing pig iron, the vanadium-containing solution, and the titanium enriched slag are shown in table 2. The iron grade of the obtained vanadium-containing pig iron is 91.28%, and - the recovery rate is up to 92.68%. The concentration of the vanadium-containing solution V205 is 8.5 g/L, and the recovery rate of vanadium is 89.45%. The TiO2 grade of the titanium enriched slag is 39.85%, and the recovery rate of titanium is 99.47%. The conversion and separation of iron, vanadium and titanium from vanadium-titanium-iron concentrate are well achieved.
Embodiment 8 100 parts of 8 # vanadium-titanium-iron concentrate, 50 parts of a mixture of sodium carbonate and sodium hydroxide (mol(Na2CO3/Na0H)=1:1), and 40 parts of anthracite are well mixed. Then, the mixture is kept for 1.5 hours in a muffle furnace at temperature of 1250 C. The vanadium-containing pig iron and the vanadium titanium enriched slag are obtained. The vanadium titanium enriched slag is crushed and finely grounded, and is leached for 4 hour under the condition of 90 C and a liquid-solid mass ratio of 2.5:1.
Filtering is conducted, after which the vanadium-containing solution and the titanium enriched slag are obtained. The chemical composition of vanadium-titanium-iron concentrate are shown in table 1. The separating results of the vanadium-containing pig iron, the vanadium-containing solution, and the titanium enriched slag are shown in table 2. The iron grade of the obtained vanadium-containing pig iron is 97.65%, and the recovery rate is up to 98.15%. The concentration of the vanadium-containing solution V205 is 11.8 g/L, and the recovery rate of vanadium is 89.58%. The TiO2 grade of the titanium enriched slag is 38.74%, and the recovery rate of titanium is 99.65%.
The conversion and separation of iron, vanadium and titanium from vanadium-titanium-iron concentrate are well achieved.
Table 1 Analysis of eight vanadium-titanium-iron concentrates in the embodiments /%
Ore sample TFe TiO2 V205 SiO2 A1203 CaO MgO
number 1 50.28 13.12 0.53 3.07 6.17 1.04 3.77 2 37.45 28.85 1.23 12.37 2.62 6.75 0.99 3 45.38 18.58 1.52 8.66 2.56 3.27 0.88 4 55.33 8.65 0.35 4.60 4.52 2.01 0.60 30.06 32.47 1.03 14.37 3.02 6.95 ' 1.29 6 59.58 6.23 1.86 2.13 2.65 1.01 0.57 7 48.18 25.22 3.89 7.56 1.89 2.01 2.11 8 50.15 18.18 4.90 3.58 3.68 1.09 0.85 Table 2 Reaction and separation results of the "one-step method"
of eight vanadium-titanium-iron concentrates in the embodiments Grade/% Recover"
Ore sample Product name number TFe TiO2 V205 Fe TiO2 V205 Vanadium-containing 97.62 0.20 0.21 99.40 0.23 19.35 Pig iron Vanadium-containing _ _ 3.2g/L - - 70.46 1 solution Titanium enriched 0.66 35.67 0.16 0.60 99.77 10.19 slag Vanadium-containing 95.38 0.32 0.24 98.71 0.46 5.42 Pig iron Vanadium-containing - - 5.2g/L - 90.50 2 solution Titanium enriched 0.81 42.67 0.25 1.29 99.54 4.08 slag Vanadium-containing 96.54 0.26 0.30 99.10 0.39 7.05 Pig iron Vanadium-containing 3 4.5g/L - 88.56 solution Titanium enriched 0.52 39.52 0.22 0.90 99.61 4.39 slag Vanadium-containing 97.38 0.25 0.52 99.85 0.26 15.82 Pig iron Vanadium-containing - - 2.8g/L - - 80.30 4 solution Titanium enriched 0.51 46.69 0.17 0.29 99.74 3.68 slag 1 Vanadium-containing 97.02 0.30 0.38 98.60 0.27 10.05 Pig iron
5 Vanadium-containing 4.1g/L - 86.22 solution Titanium enriched 0.32 48.12 0.17 1.40 99.73 3.73 slag Vanadium-containing 98.12 0.10 0.20 99.85 0.09 10.05 Pig iron Vanadium-containing - 4.7g/L - 83.40
6 solution Titanium enriched 0.26 40.67 0.08 0.15 99.01 6.55 slag Vanadium-containing 91.28 0.15 0.10 92.68 0.13 2.81 Pig iron ; 7 Vanadium-containing 8.5 89.45 solution g,/L
Titanium enriched 5.68 39.85 0.38 7.32 99.87 7.74 slag Vanadium-containing 97.65 0.10 0.75 98.15 035 5.84 Pig iron 8 Vanadium-containing 11.8 89.58 solution Titanium enriched 0.45 38.74 0.28 1.85 99.65 4.58 slag Moreover, the present invention may also have a variety of embodiments.
Artisans who are familiar with the art can make various corresponding modifications and variations based on the disclosure of the present invention without departing from the spirit and substance of the present invention. However, the corresponding modifications and variations should belong to the protective scope of the claims of the invention.
Titanium enriched 5.68 39.85 0.38 7.32 99.87 7.74 slag Vanadium-containing 97.65 0.10 0.75 98.15 035 5.84 Pig iron 8 Vanadium-containing 11.8 89.58 solution Titanium enriched 0.45 38.74 0.28 1.85 99.65 4.58 slag Moreover, the present invention may also have a variety of embodiments.
Artisans who are familiar with the art can make various corresponding modifications and variations based on the disclosure of the present invention without departing from the spirit and substance of the present invention. However, the corresponding modifications and variations should belong to the protective scope of the claims of the invention.
Claims (7)
1. A method for converting and separating vanadium, titanium, and iron from vanadium-titanium-iron concentrate, comprising:
(1) Mixing the vanadium-titanium-iron concentrate with an addition agent containing sodium element and a reducing agent, conducting roasting, so that vanadium-containing pig iron and vanadium titanium enriched slag are obtained, wherein a ratio by weight is vanadium-titanium-iron concentrate: addition agent containing sodium element: reducing agent = 100:
(40-80): (20-50);
(2) Leaching the vanadium titanium enriched slag obtained in the step (1) in water, conducting filtering, such that a vanadium-containing solution and a titanium slag are obtained.
(1) Mixing the vanadium-titanium-iron concentrate with an addition agent containing sodium element and a reducing agent, conducting roasting, so that vanadium-containing pig iron and vanadium titanium enriched slag are obtained, wherein a ratio by weight is vanadium-titanium-iron concentrate: addition agent containing sodium element: reducing agent = 100:
(40-80): (20-50);
(2) Leaching the vanadium titanium enriched slag obtained in the step (1) in water, conducting filtering, such that a vanadium-containing solution and a titanium slag are obtained.
2.The method of claim 1,wherein a roasting temperature in the step (1) is 1100-1400°C
and a roasting time is 0.5-4h.
and a roasting time is 0.5-4h.
3. The method of claim 1, wherein the vanadium-titanium-iron concentrate in the step (1) comprises iron with a total mass fraction of 30%-60%, V205 with a mass fraction of 0.15% -5.0%, and TiO2 with a mass fraction of 5%-35%.
4. The method of claim 1, wherein the addition agent in the step (1) is one item or a mixture of more than one items selected from a group consisting of sodium carbonate, sodium hydroxide, sodium sulfate, sodium chloride, sodium borate, and sodium bicarbonate.
5. The method of claim 1, wherein the reducing agent in the step (1) is one item or a mixture of more than one items selected from a group consisting of anthracite, bituminous coal, brown coal, and coke.
6. The method of claim 1, wherein the vanadium-containing pig iron in the step (1) has an iron mass fraction of 90%-99%, and a vanadium mass fraction of 0.05%4%.
7. The method of claim 1, wherein a leaching liquid-solid ratio in the step (2) is 1:1-5:1, a leaching temperature is 30-100 °C, and a leaching time is 0.5-4 hours.
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| CN109321759B (en) * | 2018-11-14 | 2020-04-10 | 西南科技大学 | Method for extracting titanium, iron, aluminum and magnesium components in high-titanium slag by virtue of sectional roasting |
| CN109943719B (en) * | 2019-04-19 | 2021-03-23 | 冉显俊 | Method for simultaneously preparing titanium slag and vanadium-containing pig iron by taking vanadium-titanium magnetite as raw material |
| CN112024121B (en) * | 2020-08-31 | 2023-05-23 | 重庆优钛实业有限公司 | Vanadium titano-magnetite separation and extraction method |
| CN113430317A (en) * | 2021-07-06 | 2021-09-24 | 谢应凯 | Method for preparing pig iron, vanadium slag and titanium slag by using submerged arc furnace and smelting furnace |
| CN113737026A (en) * | 2021-08-04 | 2021-12-03 | 云南国钛金属股份有限公司 | Method for cleanly extracting vanadium from titanium tetrachloride refined vanadium slag |
| CN113774237A (en) * | 2021-09-15 | 2021-12-10 | 中冶赛迪工程技术股份有限公司 | Method for preparing vanadium-rich liquid by using vanadium-rich slag |
| CN114317990B (en) * | 2021-12-30 | 2023-04-25 | 中国科学院过程工程研究所 | Method for extracting vanadium from vanadium-containing steel slag through sodium-treatment oxidation water quenching |
-
2017
- 2017-01-12 CA CA2954871A patent/CA2954871C/en active Active
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| Publication number | Publication date |
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| CA2954871A1 (en) | 2018-07-12 |
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