CN112174153B - Method for preparing A-type zeolite by using titanium-containing blast furnace slag - Google Patents
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- 239000002893 slag Substances 0.000 title claims abstract description 83
- 239000010936 titanium Substances 0.000 title claims abstract description 82
- 229910052719 titanium Inorganic materials 0.000 title claims abstract description 81
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 title claims abstract description 80
- 229910021536 Zeolite Inorganic materials 0.000 title claims abstract description 38
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 title claims abstract description 38
- 239000010457 zeolite Substances 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 17
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims abstract description 38
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 24
- 239000000203 mixture Substances 0.000 claims abstract description 22
- 239000002253 acid Substances 0.000 claims abstract description 17
- 238000006243 chemical reaction Methods 0.000 claims abstract description 17
- 238000001035 drying Methods 0.000 claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 13
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000000227 grinding Methods 0.000 claims abstract description 12
- 238000005406 washing Methods 0.000 claims abstract description 10
- 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 abstract description 7
- 239000008367 deionised water Substances 0.000 claims abstract description 7
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 7
- 229910052708 sodium Inorganic materials 0.000 claims abstract description 7
- 239000011734 sodium Substances 0.000 claims abstract description 7
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 6
- 238000010438 heat treatment Methods 0.000 claims abstract description 5
- 238000002156 mixing Methods 0.000 claims abstract description 5
- 238000001816 cooling Methods 0.000 claims abstract description 3
- 238000011282 treatment Methods 0.000 claims description 8
- 238000010306 acid treatment Methods 0.000 claims description 7
- JYIMWRSJCRRYNK-UHFFFAOYSA-N dialuminum;disodium;oxygen(2-);silicon(4+);hydrate Chemical compound O.[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[Na+].[Na+].[Al+3].[Al+3].[Si+4] JYIMWRSJCRRYNK-UHFFFAOYSA-N 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 238000003723 Smelting Methods 0.000 claims description 4
- 229910052720 vanadium Inorganic materials 0.000 claims description 4
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 claims description 4
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 3
- -1 polytetrafluoroethylene Polymers 0.000 claims description 2
- 238000004321 preservation Methods 0.000 claims description 2
- 230000035484 reaction time Effects 0.000 claims description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims 1
- 239000004810 polytetrafluoroethylene Substances 0.000 claims 1
- 239000002245 particle Substances 0.000 abstract description 6
- 239000000126 substance Substances 0.000 abstract description 6
- 238000002425 crystallisation Methods 0.000 abstract description 5
- 230000008025 crystallization Effects 0.000 abstract description 5
- 239000000463 material Substances 0.000 abstract description 5
- 238000003756 stirring Methods 0.000 abstract description 5
- 239000003513 alkali Substances 0.000 abstract description 2
- 238000001027 hydrothermal synthesis Methods 0.000 abstract description 2
- 230000004044 response Effects 0.000 abstract description 2
- 239000004065 semiconductor Substances 0.000 abstract description 2
- 238000002386 leaching Methods 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 4
- 238000000605 extraction Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 238000007873 sieving Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000004075 alteration Effects 0.000 description 2
- 239000004566 building material Substances 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000002910 solid waste Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 238000005660 chlorination reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 229910001678 gehlenite Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910001719 melilite Inorganic materials 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B33/00—Silicon; Compounds thereof
- C01B33/20—Silicates
- C01B33/26—Aluminium-containing silicates, i.e. silico-aluminates
- C01B33/28—Base exchange silicates, e.g. zeolites
- C01B33/2807—Zeolitic silicoaluminates with a tridimensional crystalline structure possessing molecular sieve properties; Isomorphous compounds wherein a part of the aluminium ore of the silicon present may be replaced by other elements such as gallium, germanium, phosphorus; Preparation of zeolitic molecular sieves from molecular sieves of another type or from preformed reacting mixtures
- C01B33/2815—Zeolitic silicoaluminates with a tridimensional crystalline structure possessing molecular sieve properties; Isomorphous compounds wherein a part of the aluminium ore of the silicon present may be replaced by other elements such as gallium, germanium, phosphorus; Preparation of zeolitic molecular sieves from molecular sieves of another type or from preformed reacting mixtures of type A (UNION CARBIDE trade name; corresponds to GRACE's types Z-12 or Z-12L)
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B39/00—Compounds having molecular sieve and base-exchange properties, e.g. crystalline zeolites; Their preparation; After-treatment, e.g. ion-exchange or dealumination
- C01B39/02—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof; Direct preparation thereof; Preparation thereof starting from a reaction mixture containing a crystalline zeolite of another type, or from preformed reactants; After-treatment thereof
- C01B39/14—Type A
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2002/00—Crystal-structural characteristics
- C01P2002/70—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data
- C01P2002/72—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data by d-values or two theta-values, e.g. as X-ray diagram
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/60—Particles characterised by their size
- C01P2004/61—Micrometer sized, i.e. from 1-100 micrometer
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- Life Sciences & Earth Sciences (AREA)
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- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
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- Silicates, Zeolites, And Molecular Sieves (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention provides a method for preparing A-type zeolite by utilizing titanium-containing blast furnace slag. The method comprises the steps of drying titanium-containing blast furnace slag, adding hydrochloric acid into the ground titanium slag, stirring, washing with water, drying, obtaining acid-treated titanium slag, and grinding; adding sodium hydroxide into a nickel crucible, adding the obtained acid-treated titanium slag, mixing, putting into a tube furnace, heating, preserving heat, cooling to room temperature, grinding, adding deionized water and sodium metaaluminate into the obtained mixture, stirring, transferring into a high-pressure reaction kettle, and reacting at high temperature. Washing with water and drying to obtain zeolite. The titanium-containing blast furnace slag zeolite prepared by adopting the acid leaching-alkali melting-hydrothermal method has good crystallization, obvious characteristic peaks, and is typical A-type zeolite, and the main chemical components of the zeolite are uniformly distributed. Meanwhile, the particle size of the material is uniform, and the material shows the property of a wide forbidden band semiconductor material under the irradiation of full-band light, namely, the response degree to visible light is low.
Description
Technical Field
The invention belongs to the field of solid waste resource utilization of titanium-containing blast furnace slag, and relates to a method for preparing A-type zeolite by utilizing titanium-containing blast furnace slag.
Background
The titanium-containing blast furnace slag is waste solid generated by smelting vanadium titanomagnetite from blast furnace slag metallurgy, and aiming at the current production situation and existing problems of the titanium-containing blast furnace slag, new breakthrough should be sought, and the establishment of innocent treatment and comprehensive utilization of resources of the titanium-containing blast furnace slag is urgent. At present, the titanium-containing blast furnace slag still has the difficulty of recycling and comprehensively utilizing in the current steel industry, wherein the steel production capacity is excessive and the environmental protection requirement is high. As a production enterprise of the titanium-containing blast furnace slag, the resource can be fully utilized, and new vigor and benefit increase points can be brought to the enterprise.
The development of a new technology for comprehensively utilizing low titanium slag is urgent, a large number of researchers develop work on the technology, and the technology is divided into two utilization ideas: firstly, the titanium element in the slag is extracted, and secondly, the slag is integrally modified to prepare the high-performance slagA material. For the areas with high titanium content and low glassy components of the titanium-bearing slag, the titanium extraction process technology of high-temperature carbonization and low-temperature selective chlorination of high-titanium slag can be used, but 0.8 ton of titanium extraction tailings can be produced when one ton of high-titanium slag is consumed by the process. The utilization of the titanium extraction tailings is also a problem to be solved urgently in China. If a method for reasonably disposing the titanium extraction tailings is not found, the stockpiling becomes a stumbled stone for enterprises and national economic development. In addition, most of the research is focused on the production of building materials from the same as raw materials. Compared with the high titanium blast furnace slag, the titanium-containing blast furnace slag has less perovskite phase and better water activation, can be directly used as a cement blend for preparing cement, but is worth mentioning as TiO 2 When the content is more than 4%, the activity of the slag is reduced, thereby limiting the use of the slag as a direct raw material in the field of building materials. Therefore, the development and utilization of the titanium-containing blast furnace slag still have a plurality of problems in practical application, and a plurality of researchers in the field of the solid waste resource utilization of the titanium-containing blast furnace slag currently do a great deal of research work and development strategies to solve the problems.
Disclosure of Invention
The invention aims to provide a method for preparing A-type zeolite by utilizing titanium-containing blast furnace slag, which is characterized by comprising the following steps of:
s1: grinding titanium-containing blast furnace slag, adding hydrochloric acid for treatment, washing and drying to obtain acid-treated titanium slag;
s2: mixing sodium hydroxide and the acid-treated titanium slag obtained in the step S1 in a reactor, heating for reaction, cooling to room temperature and grinding to obtain a mixture;
s3: adding deionized water and sodium metaaluminate into the mixture obtained in the step S2, mixing, transferring into a reaction kettle, and reacting at a high temperature; after the reaction is completed, the product is washed and dried to obtain the type A zeolite.
In the step S1, the titanium-containing blast furnace slag is blast furnace slag generated in the process of smelting vanadium titano-magnetite in a blast furnace.
In the step S1, hydrochloric acid with the concentration of 2-5 mol/L is adopted, and the solid-liquid ratio of the titanium blast furnace slag to the hydrochloric acid is 1:8-1:16.
Further, in step S2, the reactor is a nickel crucible;
in the step S2, the weight ratio of the sodium hydroxide to the acid treatment titanium slag is (3-4) to 2.
Further, in step S2, heating is performed by using a tube furnace; in the reaction process, the temperature is raised to 590-610 ℃, the temperature raising rate is 2-5 ℃/min, and the heat preservation time is 2-3 h.
Further, in step S3, the ratio of the weight (g) of the mixture to the volume (mL) of deionized water and the weight (g) of sodium metaaluminate is: (5-6) to (28-37) to (1.2-1.6).
In step S3, the reaction kettle is a high-pressure reaction kettle, and the reaction time is 7-8 h at the temperature of 95-105 ℃.
Compared with the prior art, the invention has at least the following advantages:
1. the invention opens up a new research direction for comprehensive and effective utilization of the titanium-containing blast furnace slag.
2. The titanium-containing blast furnace slag generated by smelting vanadium titano-magnetite in the blast furnace is effectively utilized, the problems of land occupation and environmental pollution caused by the titanium-containing blast furnace slag are avoided, and the economic benefit can be created.
3. The titanium-containing blast furnace slag zeolite prepared by adopting an acid leaching-alkali melting-hydrothermal method has good crystallization, various characteristic peaks are obvious, and the titanium-containing blast furnace slag zeolite is typical A-type zeolite.
4. The zeolite obtained by the invention has uniform distribution of main chemical components, contains Al, si, na, O and other elements, and does not detect effective Ti element components.
5. The zeolite obtained by the invention has uniform particle size and particle size of about 1-2 mu m. It shows the property of wide band gap semiconductor material under the irradiation of full wave band light, namely has low response degree to visible light.
Drawings
FIG. 1 shows XRD results of titanium-containing blast furnace slag and zeolite prepared according to the present invention.
Detailed Description
The present invention is further described below with reference to examples, but it should not be construed that the scope of the above subject matter of the present invention is limited to the following examples. Various substitutions and alterations are made according to the ordinary skill and familiar means of the art without departing from the technical spirit of the invention, and all such substitutions and alterations are intended to be included in the scope of the invention.
Example 1: a method for preparing A-type zeolite by using titanium-containing blast furnace slag adopts hydrochloric acid leaching treatment, and the concentration of hydrochloric acid is 5mol/L, so that the A-type zeolite is prepared.
The preparation process comprises the following steps:
drying the titanium-containing blast furnace slag, grinding and sieving with a 200-mesh sieve; 10g of ground titanium slag is taken, 120mL of hydrochloric acid with the concentration of 5mol/L is added, stirring is carried out for 4 hours, washing and drying are carried out, thus obtaining acid-treated titanium slag, grinding is carried out, a 200-mesh sieve is carried out, and main components before and after acid leaching are shown in table 1. Then, 4.006g of sodium hydroxide is weighed into a 50mL nickel crucible respectively, 2g of acid treatment titanium slag is added, the mixture is mixed and put into a tube furnace, the temperature is raised to 600 ℃ (the temperature raising rate is 5 ℃/min), the heat is preserved for 2 hours, the mixture is cooled to room temperature, and the mixture is ground and screened by a 200-mesh sieve. 36mL of deionized water and 1.604g of sodium metaaluminate were then added to the resulting mixture, stirred for 3 hours, transferred into a high-pressure reaction vessel, and reacted at 100℃for 8 hours. Washing with water and drying to obtain zeolite.
The titanium-containing blast furnace slag zeolite has good crystallization and obvious characteristic peaks, is typical A-type zeolite, and has the particle size of about 1-2 mu m.
TABLE 1 acid leaching titanium slag chemical composition table (wt%)
Example 2: a method for preparing A-type zeolite by using titanium-containing blast furnace slag adopts hydrochloric acid leaching treatment, and the concentration of hydrochloric acid is 4mol/L, so that the A-type zeolite is prepared.
The preparation process comprises the following steps:
drying the titanium-containing blast furnace slag, grinding and sieving with a 200-mesh sieve; 10g of ground titanium slag is taken, 120mL of hydrochloric acid with the concentration of 1mol/L is added, stirring is carried out for 4 hours, washing and drying are carried out, thus obtaining acid-treated titanium slag, grinding is carried out, a 200-mesh sieve is carried out, and main components before and after acid leaching are shown in table 1. Then, 4.045g of sodium hydroxide is weighed into a 50mL nickel crucible respectively, 2g of acid treatment titanium slag is added, the mixture is mixed and put into a tube furnace, the temperature is raised to 600 ℃ (the temperature raising rate is 5 ℃/min), the heat is preserved for 2 hours, the mixture is cooled to room temperature, and the mixture is ground and screened by a 200-mesh sieve. 36.7mL of deionized water and 1.620g of sodium metaaluminate were then added to the resulting mixture, stirred for 3 hours, transferred into a high-pressure reaction vessel, and reacted at 100℃for 8 hours. Washing with water and drying to obtain zeolite.
The titanium-containing blast furnace slag zeolite has good crystallization and obvious characteristic peaks, is typical A-type zeolite, and has the particle size of about 1-2 mu m.
Example 3: a method for preparing A-type zeolite by using titanium-containing blast furnace slag adopts hydrochloric acid leaching treatment, and the concentration of hydrochloric acid is 2mol/L, so that the A-type zeolite is prepared.
The preparation process comprises the following steps:
drying the titanium-containing blast furnace slag, grinding and sieving with a 200-mesh sieve; 10g of ground titanium slag is taken, 120mL of hydrochloric acid with the concentration of 2mol/L is added, stirring is carried out for 4 hours, washing and drying are carried out, thus obtaining acid-treated titanium slag, grinding is carried out, a 200-mesh sieve is carried out, and main components before and after acid leaching are shown in table 1. Then, 3.089g of sodium hydroxide is weighed into a 50mL nickel crucible respectively, 2g of acid treatment titanium slag is added, the mixture is mixed and put into a tube furnace, the temperature is raised to 600 ℃ (the temperature raising rate is 5 ℃/min), the heat is preserved for 2 hours, the mixture is cooled to room temperature, and the mixture is ground and screened by a 200-mesh sieve. Then, 27.8mL of deionized water and 1.237g of sodium metaaluminate were added to the obtained mixture, and stirred for 3 hours, transferred into a high-pressure reaction vessel, and reacted at 100℃for 8 hours. Washing with water and drying to obtain zeolite.
The titanium-containing blast furnace slag zeolite has good crystallization and obvious characteristic peaks, is typical A-type zeolite, and has the particle size of about 1-2 mu m.
The invention adopts hydrochloric acid with different concentrations to carry out acid leaching treatment on titanium slag so as to remove CaO, mgO and Fe 2 O 3 The contents of chemical components in the titanium slag before and after the treatment of hydrochloric acid with different concentrations by combining with XRF are measured, and the results are shown in Table 2.
TABLE 2 content of chemical components in titanium slag (wt%)
As can be seen from the table, the hydrochloric acid of different concentrations has a great influence on the chemical composition of the titanium slag component after the acid treatment, and when the hydrochloric acid concentration is increased from 2M to 5M, the amphoteric oxide Al in the titanium slag 2 O 3 The basic oxides CaO, mgO and the like show the trend of decreasing before increasing, and simultaneously with the increase of the acid concentration, the SiO 2 The relative content of (2) tends to increase and decrease. Notably, when the concentration was increased to 4M, siO in the titanium slag 2 Up to 94.91%. Therefore, 4M acid treatment of titanium slag is the best silicon source for zeolite synthesis.
As shown in fig. 1, the XRD diffraction results of the titanium-containing blast furnace slag show that the main phases thereof are gehlenite, perovskite, melilite, etc., while the XRD diffraction results of the titanium-containing blast furnace slag zeolite show that the main components thereof are type a zeolite whose characteristic peaks at 6.28 ° (111), 10.095 ° (220), 11.844 ° (311), 15.580 ° (331), 18.681 ° (511), etc., correspond to PDF card numbers according to the type a zeolite as follows: 47-0736, and the peaks in the graph are obviously narrow and sharp, and have larger intensity, which indicates that the zeolite prepared from the titanium-containing blast furnace slag has better crystallinity, the main phase composition is A-type zeolite, and the synthesized A-type zeolite has good crystallinity and no hetero-crystalline phase.
Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the technical solution of the present invention, which is intended to be covered by the scope of the claims of the present invention.
Claims (6)
1. A method for preparing A-type zeolite by using titanium-containing blast furnace slag, which is characterized by comprising the following steps:
s1: grinding titanium-containing blast furnace slag, adding hydrochloric acid for treatment, washing and drying to obtain acid-treated titanium slag; the titanium blast furnace slag is blast furnace slag generated in the process of smelting vanadium titano-magnetite in a blast furnace;
s2: mixing sodium hydroxide and the acid-treated titanium slag obtained in the step S1 in a reactor, heating for reaction, cooling to room temperature and grinding to obtain a mixture;
s3: adding deionized water and sodium metaaluminate into the mixture obtained in the step S2, mixing, transferring into a high-pressure reaction kettle, and reacting at a high temperature; after the reaction is completed, the product is washed and dried to obtain the type A zeolite.
2. The method for preparing type a zeolite from titanium-containing blast furnace slag according to claim 1, wherein: in the step S1, hydrochloric acid with the concentration of 2-5 mol/L is adopted.
3. The method for preparing type a zeolite from titanium-containing blast furnace slag according to claim 1, wherein: in step S2, the reactor is a nickel crucible.
4. A process for preparing zeolite a from titanium-containing blast furnace slag according to claim 1 or 3, wherein: in the step S2, the weight ratio of the sodium hydroxide to the acid treatment titanium slag is (3-4) to 2.
5. A process for preparing zeolite a from titanium-containing blast furnace slag according to claim 1 or 3, wherein: in the step S2, heating by adopting a tube furnace; in the reaction process, the temperature is raised to 590-610 ℃, the temperature raising rate is 2-5 ℃/min, and the heat preservation time is 2-3 h.
6. The method for preparing type a zeolite from titanium-containing blast furnace slag according to claim 1, wherein: in the step S3, the reaction kettle is a polytetrafluoroethylene reaction kettle, and the reaction time is 7-8 h at the temperature of 95-105 ℃ during the reaction.
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Inventor after: Yang Chen Inventor after: Yang Jian Inventor after: Duan Xu Inventor after: Liu Runxue Inventor after: Hu Guang Inventor after: Jiao Qingrui Inventor after: Zhao Mingxue Inventor after: Liu Qingcai Inventor before: Duan Xu Inventor before: Yang Jian Inventor before: Hu Guang Inventor before: Yang Chen Inventor before: Jiao Qingrui Inventor before: Zhao Mingxue Inventor before: Liu Qingcai |