CN114045404A - Titanium concentrate hydrogen reduction method - Google Patents
Titanium concentrate hydrogen reduction method Download PDFInfo
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- CN114045404A CN114045404A CN202111355528.7A CN202111355528A CN114045404A CN 114045404 A CN114045404 A CN 114045404A CN 202111355528 A CN202111355528 A CN 202111355528A CN 114045404 A CN114045404 A CN 114045404A
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- 239000010936 titanium Substances 0.000 title claims abstract description 83
- 229910052719 titanium Inorganic materials 0.000 title claims abstract description 83
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 title claims abstract description 81
- 239000012141 concentrate Substances 0.000 title claims abstract description 77
- 230000009467 reduction Effects 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 27
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 24
- 239000001257 hydrogen Substances 0.000 title claims abstract description 24
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 24
- 238000006722 reduction reaction Methods 0.000 claims abstract description 44
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 40
- 238000006243 chemical reaction Methods 0.000 claims abstract description 38
- 150000002506 iron compounds Chemical class 0.000 claims abstract description 29
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 22
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims abstract description 22
- 229910052742 iron Inorganic materials 0.000 claims abstract description 14
- 239000002893 slag Substances 0.000 claims abstract description 12
- 238000007599 discharging Methods 0.000 claims abstract description 10
- 230000035484 reaction time Effects 0.000 claims abstract description 10
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 8
- 229960005191 ferric oxide Drugs 0.000 claims abstract description 6
- 235000013980 iron oxide Nutrition 0.000 claims abstract description 6
- 239000004408 titanium dioxide Substances 0.000 claims abstract description 6
- 229910052751 metal Inorganic materials 0.000 claims abstract description 3
- 239000002184 metal Substances 0.000 claims abstract description 3
- 239000007789 gas Substances 0.000 claims description 24
- 238000009826 distribution Methods 0.000 claims description 20
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 17
- 239000000203 mixture Substances 0.000 claims description 12
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 9
- 229910052681 coesite Inorganic materials 0.000 claims description 9
- 229910052593 corundum Inorganic materials 0.000 claims description 9
- 229910052906 cristobalite Inorganic materials 0.000 claims description 9
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 9
- 239000000377 silicon dioxide Substances 0.000 claims description 9
- 229910052682 stishovite Inorganic materials 0.000 claims description 9
- 239000000126 substance Substances 0.000 claims description 9
- 229910052905 tridymite Inorganic materials 0.000 claims description 9
- 229910001845 yogo sapphire Inorganic materials 0.000 claims description 9
- 239000002245 particle Substances 0.000 claims description 6
- 239000012535 impurity Substances 0.000 claims description 5
- 230000008569 process Effects 0.000 claims description 5
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims description 5
- 239000007787 solid Substances 0.000 abstract description 6
- 239000000571 coke Substances 0.000 abstract description 5
- 238000011946 reduction process Methods 0.000 abstract description 3
- 235000010215 titanium dioxide Nutrition 0.000 description 5
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 229910052720 vanadium Inorganic materials 0.000 description 3
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 3
- 238000003723 Smelting Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- JCDAAXRCMMPNBO-UHFFFAOYSA-N iron(3+);oxygen(2-);titanium(4+) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[Ti+4].[Ti+4].[Fe+3].[Fe+3] JCDAAXRCMMPNBO-UHFFFAOYSA-N 0.000 description 2
- 238000005272 metallurgy Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000007858 starting material Substances 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009194 climbing Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- YDZQQRWRVYGNER-UHFFFAOYSA-N iron;titanium;trihydrate Chemical compound O.O.O.[Ti].[Fe] YDZQQRWRVYGNER-UHFFFAOYSA-N 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
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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
-
- 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
- C22B5/12—Dry methods smelting of sulfides or formation of mattes by gases
- C22B5/14—Dry methods smelting of sulfides or formation of mattes by gases fluidised material
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The present disclosure provides a method for hydrogen reduction of titanium concentrate, comprising the steps of: step one, titanium concentrate is placed in a fluidized bed, and H is introduced2As a reducing agent to carry out reduction reaction, wherein the reaction temperature is controlled to be 800-1100 ℃, the reaction time is 20-90 min, and H2The dosage of the iron compound in the titanium concentrate is 105 to 140 percent of the chemical reaction equivalent required by the metal iron after the complete reaction of the iron compound in the titanium concentrate; and step two, after the reduction reaction is finished, discharging a reduction product from a slag discharge port at the lower part of the fluidized bed. The method takes hydrogen as a reducing agent, and carries out high-efficiency gas-solid reaction in a fluidized bed to reduce iron compounds of the titanium concentrate into metallic iron and titanium dioxide, so that the consumption of coke in the one-step reduction process of the electric furnace can be reduced.
Description
Technical Field
The disclosure belongs to the technical field of metallurgy, and particularly relates to a method for hydrogen reduction of titanium concentrate.
Background
At present, ilmenite, vanadium titano-magnetite and rutile are mainly used in industryThe stone ore is used as raw material to prepare titanium products. The Panzhihua area contains abundant titanium resources, which account for more than 90% of the total amount of titanium resources in China, and most of the Panzhihua area is vanadium titano-magnetite. Based on the occurrence state of valuable elements of vanadium titano-magnetite, the main process of steel climbing always adopts the first iron selection to obtain iron ore concentrate for years, and the iron ore concentrate is subjected to the process of 'blast furnace-converter' for steelmaking; the iron tailings are further selected to obtain titanium concentrate, and the titanium concentrate is added with a certain proportion of coke and then smelted by an electric furnace to obtain high-grade titanium raw material, namely high-titanium slag, and the high-titanium slag can be used as a raw material of titanium white chloride. The electric furnace smelting of titanium concentrate is the mainstream process at present, but the method has high energy consumption, coke is used as a reducing agent, and CO is used as2The discharge amount is large.
Therefore, the development of an economic and environment-friendly titanium concentrate reduction method is an urgent problem to be solved in the technical field of metallurgy.
BRIEF SUMMARY OF THE PRESENT DISCLOSURE
In order to solve the technical problem, the method for reducing the titanium concentrate by using hydrogen is used as a reducing agent, efficient gas-solid reaction is carried out in a fluidized bed, iron compounds of the titanium concentrate are reduced into metallic iron and titanium dioxide, and the consumption of coke in the one-step reduction process of an electric furnace can be reduced.
According to the present disclosure, there is provided a method for hydrogen reduction of titanium concentrate, comprising the steps of:
step one, titanium concentrate is placed in a fluidized bed, and H is introduced2As a reducing agent to carry out reduction reaction, wherein the reaction temperature is controlled to be 800-1100 ℃, the reaction time is 20-90 min, and H2The dosage of the iron compound in the titanium concentrate is 105 to 140 percent of the chemical reaction equivalent required by the metal iron after the complete reaction of the iron compound in the titanium concentrate;
and step two, after the reduction reaction is finished, discharging a reduction product from a slag discharge port at the lower part of the fluidized bed.
According to one embodiment of the disclosure, the main chemical components and weight percentages of the components of the titanium concentrate are as follows: TiO 22 40％～55％，FeO 32％～38％，Fe2O3 3％～8％，SiO2 1％～4％，CaO 0％～2％，MgO 2％～6％，Al2O30 to 2 percent of the total weight of the composition, and the balance of inevitable impurities.
According to one embodiment of the disclosure, the main chemical components and weight percentages of the components of the titanium concentrate are as follows: TiO 22 47.1％，FeO 34.5％，Fe2O3 5.6％，SiO2 3.4％，CaO 1.6％，MgO 5.0％，Al2O31.2 percent, and the balance of inevitable impurities.
According to one embodiment of the disclosure, the weight distribution of the different particle sizes of the titanium concentrate is: the granularity is less than 0.044mm and less than 15%, the granularity is 25-30% from 0.044mm to 0.074mm, the granularity is 35-45% from 0.074mm to 0.15mm, the granularity is 20-25% from 0.15mm to 0.25mm, and the granularity is less than 5% from more than 0.25 mm.
According to one embodiment of the present disclosure, H2And N2Mixing, introducing into fluidized bed, and reducing reaction, wherein H2And N2The flow ratio is 2: 1-1: 2.
According to one embodiment of the present disclosure, a gas distribution plate is disposed below the fluidized bed, and the velocity of the fluidizing gas passing through the gas distribution plate is 0.1m/s to 0.4 m/s.
According to one embodiment of the disclosure, the titanium concentrate is fed into the fluidized bed via a screw feeder.
According to one embodiment of the present disclosure, the reduction product is metallic iron and titanium dioxide.
By adopting the technical scheme, the hydrogen is used as the reducing agent, the high-efficiency gas-solid reaction is carried out in the fluidized bed, the iron compounds such as iron titanate and the like in the titanium concentrate are reduced into metallic iron and titanium dioxide, the consumption of coke in the one-step reduction process of the electric furnace can be reduced, and CO is reduced in the titanium concentrate smelting process in industrial production2The emission and the improvement of the energy utilization efficiency have important significance.
Drawings
Fig. 1 is a flow diagram of a method of hydrogen reduction of titanium concentrate according to the present disclosure.
Detailed Description
In order to make the objects, technical solutions and advantages of the present disclosure more apparent, the present disclosure is further described in detail below with reference to the embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the disclosure and are not intended to limit the disclosure.
Fig. 1 shows a flow diagram of a method of hydrogen reduction of titanium concentrate according to the present disclosure. The method can be used for titanium concentrates with chemical components and weight percentages of the components as follows: TiO 22 40％～55％，FeO 32％～38％，Fe2O3 3％～8％，SiO2 1％～4％，CaO 0％～2％，MgO 2％～6％，Al2O30 to 2 percent of the total weight of the composition, and the balance of inevitable impurities. Wherein the titanium concentrate particle size preferably satisfies the following weight distribution: the granularity is less than 0.044mm and less than 15%, the granularity is 25-30% from 0.044mm to 0.074mm, the granularity is 35-45% from 0.074mm to 0.15mm, the granularity is 20-25% from 0.15mm to 0.25mm, and the granularity is less than 5% from more than 0.25 mm. Specifically, the method for hydrogen reduction of titanium concentrate according to the present disclosure generally comprises the steps of:
step one, titanium concentrate is placed in a fluidized bed, and H is introduced2As a reducing agent to carry out reduction reaction, wherein the reaction temperature is controlled to be 800-1100 ℃, the reaction time is 20-90 min, and H2The dosage of the iron compound in the titanium concentrate is 105 to 140 percent of the chemical reaction equivalent required by the complete reaction of the iron compound in the titanium concentrate into metallic iron. Wherein the titanium concentrate may be fed into the fluidized bed via a screw feeder.
And step two, after the reduction reaction is finished, discharging a reduction product from a slag discharge port at the lower part of the fluidized bed.
Wherein the fluidized bed is configured to maintain solid particles in a suspended state by passing gas through the particulate solid layer and to perform a sufficient gas-solid reduction reaction to reduce iron compounds such as iron titanate in the titanium concentrate to metallic iron and titanium dioxide. During the reduction reaction, H2Can be reacted with N2And introducing the mixture into a fluidized bed for reduction reaction after mixing at a flow ratio of 2: 1-1: 2. The fluidized bed can be provided with a gas distribution plate, and gas is provided through a plurality of uniformly distributed small holes arranged on the gas distribution plate. The fluidizing gas velocity after passing through the gas distribution plate is preferably 0.1m/s to 0.4 m/s.
The following are specific examples of the method of hydrogen reduction of titanium concentrate according to the present disclosure.
Example 1
In this example, the following titanium concentrate was used for hydrogen reduction in a fluidized bed, using the following chemical composition and weight ratio of each component:
| composition (I) | Weight ratio of |
| TiO2 | 47.1％ |
| FeO | 34.5％ |
| Fe2O3 | 5.6％ |
| SiO2 | 3.4％ |
| CaO | 1.6％ |
| MgO | 5.0％ |
| Al2O3 | 1.2％ |
Wherein, the granularity of the titanium concentrate preferably satisfies the following distribution:
| particle size | Weight ratio of |
| Less than 0.044mm | 10％ |
| 0.044～0.074mm | 27％ |
| 0.074mm～0.15mm | 41％ |
| 0.15mm～0.25mm | 21％ |
| Greater than 0.25mm | 1％ |
Feeding the titanium concentrate into a fluidized bed by a screw feeder, H2The dosage of the iron compound in the titanium concentrate is 105 percent of the chemical reaction equivalent required by the complete reaction of the iron compound in the titanium concentrate into metallic iron, and H is adjusted2And N2The flow ratio is 1:1, the speed of the fluidized gas in the fluidized bed is ensured to be 0.1m/s, and the two gases are uniformly mixed and then are sent into the reactor through a distribution plate; controlling the reaction temperature in the fluidized bed reactor to be 800 ℃, the reaction time to be 90min, obtaining a reduced product after the reaction is finished, controlling the reduction rate of the iron compound to be 81%, and discharging the reduced product from a slag discharge port at the lower part of the fluidized bed.
Example 2
Using the titanium concentrate of example 1 as the starting material, the titanium concentrate was fed into the fluidized bed by means of a screw feeder, H2The dosage of the titanium concentrate is iron in the titanium concentrateThe compound is completely reacted to 120% of the chemical reaction equivalent required by the metallic iron, and H is adjusted2And N2The flow ratio is 1:1, the speed of the fluidized gas in the fluidized bed is ensured to be 0.2m/s, and the two gases are uniformly mixed and then are sent into the reactor through a distribution plate; controlling the reaction temperature in the fluidized bed reactor to be 900 ℃, the reaction time to be 60min, obtaining a reduced product after the reaction is finished, controlling the reduction rate of the iron compound to be 83%, and discharging the reduced product from a slag discharge port at the lower part of the fluidized bed.
Example 3
Using the titanium concentrate of example 1 as the starting material, the titanium concentrate was fed into the fluidized bed by means of a screw feeder, H2The dosage of the iron compound in the titanium concentrate is 140 percent of the chemical reaction equivalent required by the complete reaction of the iron compound in the titanium concentrate into metallic iron, and H is adjusted2And N2The flow ratio is 1:1, the fluidizing gas speed in the fluidized bed is ensured to be 0.4m/s, and the two gases are uniformly mixed and then are sent into the reactor through a distribution plate; controlling the reaction temperature in the fluidized bed reactor to be 1100 ℃, controlling the reaction time to be 20min, obtaining a reduced product after the reaction is finished, controlling the reduction rate of the iron compound to be 82%, and discharging the reduced product from a slag discharge port at the lower part of the fluidized bed.
Example 4
In this example, the following titanium concentrate was used for hydrogen reduction in a fluidized bed, using the following chemical composition and weight ratio of each component:
| composition (I) | Weight ratio of |
| TiO2 | 40％ |
| FeO | 38％ |
| Fe2O3 | 8％ |
| SiO2 | 4％ |
| CaO | 2％ |
| MgO | 6％ |
| Al2O3 | 1％ |
Wherein, the granularity of the titanium concentrate preferably satisfies the following distribution:
feeding the titanium concentrate into a fluidized bed by a screw feeder, H2The dosage of the iron compound in the titanium concentrate is 105 percent of the chemical reaction equivalent required by the complete reaction of the iron compound in the titanium concentrate into metallic iron, and H is adjusted2And N2The flow ratio is 2:1, the speed of the fluidized gas in the fluidized bed is ensured to be 0.1m/s, and the two gases are uniformly mixed and then are sent into the reactor through a distribution plate; controlling the reaction temperature in the fluidized bed reactor to be 800 ℃, the reaction time to be 90min, obtaining a reduced product after the reaction is finished, controlling the reduction rate of the iron compound to be 84%, and discharging the iron compound from a slag discharge port at the lower part of the fluidized bed.
Example 5
In this example, the following titanium concentrate was used for hydrogen reduction in a fluidized bed, using the following chemical composition and weight ratio of each component:
| composition (I) | Weight ratio of |
| TiO2 | 55％ |
| FeO | 32％ |
| Fe2O3 | 3％ |
| SiO2 | 4％ |
| CaO | 0.1％ |
| MgO | 3.8％ |
| Al2O3 | 2％ |
Wherein, the granularity of the titanium concentrate preferably satisfies the following distribution:
feeding the titanium concentrate into a fluidized bed by a screw feeder, H2The dosage of the iron compound in the titanium concentrate is 120 percent of the chemical reaction equivalent required by the complete reaction of the iron compound in the titanium concentrate into metallic iron, and H is adjusted2And N2The flow ratio is 1:2, the speed of the fluidized gas in the fluidized bed is ensured to be 0.2m/s, and the two gases are uniformly mixed and then are sent into the reactor through a distribution plate; controlling the reaction temperature in the fluidized bed reactor to be 900 ℃, the reaction time to be 60min, obtaining a reduced product after the reaction is finished, controlling the reduction rate of the iron compound to be 79%, and discharging the reduced product from a slag discharge port at the lower part of the fluidized bed.
Example 6
In this example, the following titanium concentrate was used for hydrogen reduction in a fluidized bed, using the following chemical composition and weight ratio of each component:
| composition (I) | Weight ratio of |
| TiO2 | 51.4％ |
| FeO | 35.1％ |
| Fe2O3 | 6.6％ |
| SiO2 | 1％ |
| CaO | 1.8％ |
| MgO | 2％ |
| Al2O3 | 2％ |
Wherein, the granularity of the titanium concentrate preferably satisfies the following distribution:
| particle size | Weight ratio of |
| Less than 0.044mm | 1％ |
| 0.044～0.074mm | 28％ |
| 0.074mm～0.15mm | 45％ |
| 0.15mm～0.25mm | 23％ |
| Greater than 0.25mm | 3％ |
Feeding the titanium concentrate into a fluidized bed by a screw feeder, H2The dosage of the iron compound in the titanium concentrate is required for completely reacting into metallic iron140% of chemical reaction equivalent, adjusting H2And N2The flow ratio is 1:2, the speed of the fluidized gas in the fluidized bed is ensured to be 0.3m/s, and the two gases are uniformly mixed and then are sent into the reactor through a distribution plate; controlling the reaction temperature in the fluidized bed reactor to be 1100 ℃, controlling the reaction time to be 20min, obtaining a reduced product after the reaction is finished, controlling the reduction rate of the iron compound to be 74%, and discharging the iron compound from a slag discharge port at the lower part of the fluidized bed.
The above examples merely represent embodiments of the present disclosure, which are described in more detail and detail, but are not to be construed as limiting the scope of the present disclosure. It should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the concept of the present disclosure, and these changes and modifications are all within the scope of the present disclosure. Therefore, the protection scope of the present disclosure should be subject to the appended claims.
Claims (8)
1. A method for hydrogen reduction of titanium concentrate, comprising the steps of:
step one, titanium concentrate is placed in a fluidized bed, and H is introduced2As a reducing agent to carry out reduction reaction, wherein the reaction temperature is controlled to be 800-1100 ℃, the reaction time is 20-90 min, and H2The dosage of the iron compound in the titanium concentrate is 105 to 140 percent of the chemical reaction equivalent required by the metal iron after the complete reaction of the iron compound in the titanium concentrate;
and step two, after the reduction reaction is finished, discharging a reduction product from a slag discharge port at the lower part of the fluidized bed.
2. The method for hydrogen reduction of titanium concentrate according to claim 1, wherein the titanium concentrate comprises the following main chemical components in percentage by weight: TiO 22 40％～55％，FeO 32％～38％，Fe2O3 3％～8％，SiO21％～4％，CaO 0％～2％，MgO 2％～6％，Al2O30 to 2 percent of the total weight of the composition, and the balance of inevitable impurities.
3. The method of claim 2 for hydrogen reduction of titanium concentrateThe method is characterized in that the titanium concentrate comprises the following main chemical components in percentage by weight: TiO 22 47.1％，FeO 34.5％，Fe2O35.6％，SiO2 3.4％，CaO 1.6％，MgO 5.0％，Al2O31.2 percent, and the balance of inevitable impurities.
4. The method of hydrogen reduction of titanium concentrate according to claim 1, wherein the weight distribution of the different particle sizes of the titanium concentrate is: the granularity is less than 0.044mm and less than 15%, the granularity is 25-30% from 0.044mm to 0.074mm, the granularity is 35-45% from 0.074mm to 0.15mm, the granularity is 20-25% from 0.15mm to 0.25mm, and the granularity is less than 5% from more than 0.25 mm.
5. The method of hydrogen reduction of titanium concentrate according to claim 1, wherein the H is2And N2Mixing and introducing into the fluidized bed for reduction reaction, wherein H2And N2The flow ratio is 2: 1-1: 2.
6. The method for reducing the hydrogen content in the titanium concentrate according to claim 1, wherein a gas distribution plate is arranged below the fluidized bed, and the fluidizing gas velocity after passing through the gas distribution plate is 0.1-0.4 m/s.
7. The method of hydrogen reduction of titanium concentrate according to claim 1, wherein the titanium concentrate is fed into the fluidized bed via a screw feeder.
8. The process for the hydrogen reduction of titanium concentrate according to claim 1, wherein the reduction products are metallic iron and titanium dioxide.
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| CN101412536A (en) * | 2008-11-18 | 2009-04-22 | 攀钢集团研究院有限公司 | Preparation of synthetic rutile |
| CN102179292A (en) * | 2011-04-15 | 2011-09-14 | 中国地质科学院矿产综合利用研究所 | Method for separating and extracting iron, vanadium and titanium from vanadium-titanium magnetite |
| CN103031432A (en) * | 2011-09-30 | 2013-04-10 | 中国科学院过程工程研究所 | System for fluidized oxidizing/reducing roasting modification of titaniferous iron concentrate and roasting process |
| CN109110807A (en) * | 2018-10-23 | 2019-01-01 | 宜宾学院 | A kind of method of coproduction synthetic rutile and sulfuric acid method titanium pigment |
| CN110306036A (en) * | 2019-07-16 | 2019-10-08 | 东北大学 | Reduction on Fluidized Bed-electric arc melting-rotary kiln sodium processing vanadium titano-magnetite method |
| CN110317917A (en) * | 2019-07-16 | 2019-10-11 | 东北大学 | Reduction on Fluidized Bed-electric arc melting-converter sodium processing vanadium titano-magnetite method |
| CN112410539A (en) * | 2020-10-30 | 2021-02-26 | 河南佰利联新材料有限公司 | Method for sorting titanium middlings containing weak magnetic gangue minerals |
| CN112553457A (en) * | 2020-10-30 | 2021-03-26 | 河南佰利联新材料有限公司 | Method for preparing titanium-rich material from titanium middling |
| CN113088683A (en) * | 2021-04-21 | 2021-07-09 | 重庆大学 | Method for preparing low-temperature titanium chloride slag by using low-grade titanium concentrate |
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