Method for extracting titanium from non-carbonized high-titanium blast furnace slag

Abstract

The invention provides a method for extracting titanium from non-carbonized high-titanium blast furnace slag. The method comprises the following steps that S1, the liquid non-carbonized high-titanium blast furnace slag is placed in a vacuum furnace, nitrogen is introduced for a reaction, and a reaction mixture containing liquid Ca3N2 and semi-molten TiN and mixed gas containing NO and NO2 are obtained; s2, liquid Ca3N2 and semi-molten TiN in the reaction mixture are sequentially discharged out of a vacuum furnace, air quenching is conducted through high-speed airflow in the process of discharging the semi-molten TiN, and a TiN material is obtained; s3, the TiN material is transferred to a hot disintegration pool, after water is added for hot disintegration, a phosphoric acid solution is adopted for soaking, ammonium phosphate is subjected to solid-liquid separation after soaking, and solid titanium pyrophosphate is obtained; and S4, soaking the solid titanium pyrophosphate in a sodium hydroxide solution, performing solid-liquid separation after soaking, and calcining to obtain TiO2. The method disclosed by the invention is large in treatment capacity and can realize large-scale production.

Description

Technical Field

[0001] The invention relates to the technical field of waste resource utilization, in particular to a method for extracting titanium from non-carburized high-titanium blast furnace slag. Background Art

[0002] Blast furnace ironmaking is the process of reducing iron ore or iron oxide to obtain liquid pig iron and blast furnace slag. The blast furnace slag formed flows into the slag pot through different grooves. The Panxi area contains a large amount of vanadium-titanium magnetite. The blast furnace slag formed after blast furnace smelting has a high titanium content. The comparison between its basic composition and ordinary blast furnace slag is shown in Table 1.

[0003] Table 1 Comparison of components of high titanium blast furnace slag and ordinary blast furnace slag (mass content, %)

[0004] Blast furnace slag type CaO MgO <![CDATA[Al2O3]]> <![CDATA[SiO2]]> <![CDATA[Fe2O3]]> <![CDATA[TiO2]]> High Titanium Type 26-28 8-10 12-15 22-25 2-3 22-25 Common 35-38 8-10 12-15 32-35 2-3 1-2

[0005] As can be seen from Table 1, the main difference between the high-titanium blast furnace slag and the ordinary blast furnace slag in the Panzhihua area is that the mass content of SiO2 in the high-titanium blast furnace slag is 10-12% lower than that in the ordinary blast furnace slag, and the mass content of TiO2 is 20-23% higher than that in the ordinary blast furnace slag.

[0006] At present, the methods for extracting titanium from high-titanium blast furnace slag include high-temperature carbonization-low-temperature selective chlorination process, alloying extraction process, titanium selective precipitation separation technology, sulfuric acid method and hydrochloric acid impurity removal and enrichment method. The high-temperature carbonization-low-temperature selective chlorination process is to directly flow the liquid molten high-titanium blast furnace slag into a closed electric furnace, heat it to 1600-1800°C and mix it with carbon for carbonization. The carbonized liquid blast furnace slag is naturally cooled in the air, and then crushed and finely ground. The granular carbonized blast furnace slag is chlorinated with chlorine gas in a fluidized bed at 400-550°C to generate titanium tetrachloride vapor, which is separated by dust removal and condensation to obtain a crude titanium tetrachloride product and chlorinated slag. However, the power consumption cost of the carbonization process and the subsequent chlorination heat balance problem of the above method have not been well solved.

[0007] The alloying extraction process uses silicon thermal reduction to smelt silicon-titanium-ferroalloy from Panzhihua Iron and Steel blast furnace slag to produce silicon-titanium-ferroalloy containing 27.08% titanium, 31.05% silicon and 20.20% iron. The reduced residue can be used as an active mixed material for cement. However, due to the very limited market for titanium-silicon alloy applications, this process is difficult to achieve large-scale production.

[0008] The selective precipitation and separation technology of titanium in blast furnace slag is based on the principle that the titanium component in titanium-containing blast furnace slag can be selectively enriched into the perovskite phase by oxidation at high temperature. The selective precipitation and growth of the perovskite phase are promoted by adjusting the test parameters of the slag cooling rate. Finally, the selective separation of the perovskite phase in the modified titanium-containing blast furnace slag can be achieved through mineral separation treatment. This method has problems such as uneven grain size of the enriched phase perovskite and high difficulty in mineral separation. In addition, the subsequent processing cost of the titanium-rich material perovskite is still very high.

[0009] TiO2 can be extracted from blast furnace slag by sulfuric acid method; however, the main disadvantage of this method is the high consumption of sulfuric acid and high production cost; at the same time, a large amount of waste acid and green vitriol in the acid leaching solution will cause serious secondary pollution, and there is currently no suitable treatment method. In addition, the use of hydrochloric acid to remove impurities and enrich TiO2 has not been industrialized due to the large consumption of hydrochloric acid and the serious corrosion of hydrochloric acid to the reaction vessel.

[0010] Since Panzhihua Iron and Steel produces 3.5 million tons of blast furnace slag every year, the above-mentioned titanium extraction method and the amount that can be processed still need to be verified; in view of this, the present invention is specially proposed. Summary of the invention

[0011] The object of the present invention is to provide a method for extracting titanium from carburized high-titanium blast furnace slag, which has a large processing capacity and can realize large-scale production.

[0012] The present invention provides a method for extracting titanium from non-carburized high-titanium blast furnace slag, comprising the following steps:

[0013] S1: placing liquid non-carburized high-titanium blast furnace slag in a vacuum furnace, introducing nitrogen gas for reaction, and obtaining a reaction mixture containing liquid Ca3N2 and semi-molten TiN and a mixed gas containing NO and NO2;

[0014] S2: Discharging the liquid Ca3N2 and semi-molten TiN in the reaction mixture out of the vacuum furnace in sequence, and using a high-speed airflow to quench the semi-molten TiN in the process of discharging the semi-molten TiN to obtain a TiN material;

[0015] S3: transferring the TiN material to a hot and stuffy tank, adding water to the hot and stuffy tank, and then soaking it in a phosphoric acid solution, and after soaking, separating the ammonium phosphate from the solid and liquid to obtain solid titanium pyrophosphate;

[0016] S4: Soaking solid titanium pyrophosphate in sodium hydroxide solution, separating the solid from the liquid and calcining to obtain TiO2.

[0017] The non-carburized high-titanium blast furnace slag of the present invention is a high-titanium blast furnace slag that has not been carburized, and the mass content of each component is as follows: TiO2 22-25%, CaO 26-28%, MgO 8-10%, Al2O312-15%, SiO2 22-25%, and Fe2O3 2-3%; wherein TiO2 mainly exists in the form of CaTiO3.

[0018] In step S1, the reaction temperature is 1400-1500° C., for example, 1450-1480° C.; the reaction time is 8-10 h, for example, 8-9 h; and the reaction equation is as follows:

[0019] 3CaTiO3+6N2=Ca3N2+3TiN+5NO+2NO2

[0020] CaTiO3 in the non-carburized high-titanium blast furnace slag reacts with N2 to form a mixture of Ca3N2 and TiN. The melting point of Ca3N2 is 1195°C, and it gradually exists in a liquid phase. The melting point of TiN is 2950°C, and it gradually presents a semi-molten state. TiN is mixed with more impurities, and the actual content of TiN is 30-50%. At the same time, the reaction generates a mixed gas of NO and NO2, and the mixed gas is collected after the reaction is completed.

[0021] 1. In step S2, the liquid Ca3N2 and semi-molten TiN in the reaction mixture are discharged from the vacuum furnace in turn through the slag trough. The liquid Ca3N2 has better fluidity, so it is discharged from the vacuum furnace first. At this time, the remaining material is semi-molten TiN. A wind quenching device for providing a high-speed airflow is set at the outlet of the slag trough. When the semi-molten TiN begins to be discharged, the high-speed airflow is used to rapidly cool the TiN. The temperature of the high-speed airflow is room temperature, the flow rate is 20,000-30,000 cubic meters / hour, and the wind pressure is 3-5 atmospheres. By adjusting the flow rate and temperature of the high-speed airflow, the temperature of the TiN after wind quenching is 300-400°C. The purpose of wind quenching the semi-molten TiN is to make most of the titanium enter the titanate mineral phase from the perovskite, that is, to promote the transformation of the mineral phase.

[0022] In step S3, when water is pumped and hot-stuffed, the amount of water pumped per ton of TiN material is 0.1-0.15 tons, and the time of each pumping is 20-30 minutes. After each pumping, it is left to stand for 1 hour, and the water pumping is circulated for 3-5 times until the temperature of the TiN material drops to 50-100° C., for example, 50-80° C. The hot-stuffing process is essentially a phase transformation process of the Ti-containing material, so that TiN enters the titanate ore phase. The purpose of the phase transformation by hot-stuffing is to facilitate the later dissolution of TiN in the phosphoric acid solution. In addition, hot-stuffing can also promote the separation of slag and iron.

[0023] The mass content of phosphoric acid solution is 25-30%; the immersion time of phosphoric acid solution is 10-12 hours; during the immersion process, the material can be turned over every 2-3 hours. During the immersion process of phosphoric acid solution, the following chemical reactions occur:

[0024] 6TiN+14H3PO4=6TiP2O7+2(NH4)3PO4+6H2O+3H2

[0025] TiN reacts with H3PO4 to generate titanium pyrophosphate (TiP2O7) and ammonium phosphate; the titanium pyrophosphate generated by the reaction is insoluble in water, while the ammonium phosphate is soluble in water to form an ammonium phosphate solution, and the titanium pyrophosphate and the ammonium phosphate are separated by solid-liquid separation.

[0026] In step S4, the mass content of the sodium hydroxide solution is 30-50%; the immersion temperature of the sodium hydroxide solution is 60-80°C, for example, 60-70°C, and the immersion time is 2-3h. During the immersion process of the sodium hydroxide solution, the following chemical reactions occur:

[0027] TiP2O7+6NaOH=Ti(OH)4+2Na3PO4+H2O

[0028] The Ti(OH)4 generated by the reaction is insoluble in water, while Na3PO4 is soluble in water to form a solution. The Na3PO4 is separated by solid-liquid separation, and the remaining solid material Ti(OH)4 is calcined at high temperature.

[0029] The calcination temperature is 600-700°C, for example 600-650°C, and the calcination time is 8-10h. During the calcination process, the following chemical reactions occur:

[0030] Ti(OH)4=TiO2+2H2O

[0031] After calcination, TiO2 can be obtained by solid-liquid separation.

[0032] The present invention provides a new method for extracting titanium from non-carburized high-titanium blast furnace slag. The method has a large processing capacity of 1,000 to 1,200 tons, can realize large-scale production, and is particularly suitable for blast furnace slag with an annual output of 3.5 million tons. In addition, the method of the present invention has a high titanium recovery rate of 60 to 70%. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0034] Figure 1 The present invention is a process flow chart of the method for extracting titanium from non-carburized high-titanium blast furnace slag. DETAILED DESCRIPTION

[0035] It should be noted that the following detailed descriptions are illustrative and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0036] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form also includes the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this description, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0037] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] Example 1

[0039] Combination Figure 1 As shown, the method for extracting titanium from carburized high-titanium blast furnace slag in this embodiment comprises the following steps:

[0040] S1: Reaction

[0041] The mass contents of the components in the non-carburized high-titanium blast furnace slag are as follows: TiO2 22-25%, CaO26-28%, MgO8-10%, Al2O3 12-15%, SiO2 22-25%, Fe2O3 2-3%, and TiO2 mainly exists in the form of CaTiO3.

[0042] Liquid non-carburized high-titanium blast furnace slag is placed in a vacuum furnace, and N2 is introduced to react at a constant temperature of 1465°C for 8h 40min. CaTiO3 in the non-carburized high-titanium blast furnace slag reacts with N2 to produce Ca3N2, TiN, NO, and NO2, thereby obtaining a reaction mixture containing liquid Ca3N2 and semi-molten TiN and a mixed gas containing NO and NO2.

[0043] S2: Wind Quenching

[0044] After the reaction is completed, the furnace is taken out and the liquid Ca3N2 is first discharged through the slag trough; after the liquid Ca3N2 is discharged, the high-speed airflow valve at the outlet of the slag trough is opened, and the semi-molten TiN is rapidly cooled by the high-speed airflow. The temperature of the high-speed airflow is room temperature, the flow rate is 25,000 cubic meters / hour, and the wind pressure is 4 atmospheres. The temperature of the TiN after rapid cooling is maintained at about 360°C to obtain TiN material.

[0045] S3: Heat with water, soak in phosphoric acid solution

[0046] The TiN material obtained in step S2 is transferred to a hot-stifling pool for water-pumping and hot-stifling. During water-pumping and hot-stifling, 0.1 ton of water is pumped per ton of TiN material each time, and the pumping time is 30 minutes. After each pumping, it is left to stand for 1 hour, and the water pumping cycle is repeated 3-5 times until the temperature of the TiN material drops to about 70°C. Subsequently, the material is soaked in a phosphoric acid solution with a mass content of 25% for 11 hours and 20 minutes, and the material is turned over every 2 hours.

[0047] During the soaking process, TiN and H3PO4 react to generate TiP2O7, (NH4)3PO4, H2O and H2. The generated TiP2O7 is a solid material that is insoluble in water. (NH4)3PO4 dissolves in water to form an ammonium phosphate solution. H2O exists in the aqueous solution, and H2 is discharged in the form of gas. The separation is carried out by solid-liquid separation. TiP2O7 exists in the solid material and is separated from the (NH4)3PO4 liquid to obtain solid titanium pyrophosphate.

[0048] S4: Sodium hydroxide solution soaking and calcination

[0049] The solid titanium pyrophosphate obtained in step S3 is soaked in a sodium hydroxide solution with a mass content of 40%. The soaking temperature is controlled at 65° C. The soaking time is 2 h 20 min. The material is turned over once every 20 min during the soaking process.

[0050] During the soaking process, TiP2O7 and NaOH react to generate Ti(OH)4, Na3PO4 and H2O. The generated Ti(OH)4 is a solid material that is insoluble in water, while Na3PO4 is dissolved in water to form a solution. The Na3PO4 is separated by solid-liquid separation to obtain solid Ti(OH)4.

[0051] Solid Ti(OH)4 was calcined at high temperature, the calcination temperature was controlled at 650℃, the calcination time was controlled at 8h 45min, and the material was turned over every 2h during the calcination process. During the calcination process, Ti(OH)4 decomposed into TiO2 and H2O, and the water was separated by solid-liquid separation. The solid material was TiO2, and the titanium recovery rate was 69.80%.

[0052] Example 2

[0053] The method for extracting titanium from carburized high-titanium blast furnace slag in this embodiment comprises the following steps:

[0054] S1: Reaction

[0055] The mass contents of the components in the non-carburized high-titanium blast furnace slag are as follows: TiO2 22-25%, CaO26-28%, MgO8-10%, Al2O3 12-15%, SiO2 22-25%, Fe2O3 2-3%, and TiO2 mainly exists in the form of CaTiO3.

[0056] Liquid non-carburized high-titanium blast furnace slag is placed in a vacuum furnace, and N2 is introduced to react at a constant temperature of 1400°C for 10 hours. CaTiO3 in the non-carburized high-titanium blast furnace slag reacts with N2 to produce Ca3N2, TiN, NO, and NO2, thereby obtaining a reaction mixture containing liquid Ca3N2 and semi-molten TiN and a mixed gas containing NO and NO2.

[0057] S2: Wind Quenching

[0058] After the reaction is completed, the furnace is taken out and the liquid Ca3N2 is first discharged through the slag trough; after the liquid Ca3N2 is discharged, the high-speed airflow valve at the outlet of the slag trough is opened, and the semi-molten TiN is rapidly cooled by the high-speed airflow. The temperature of the high-speed airflow is room temperature, the flow rate is 20,000 cubic meters / hour, and the wind pressure is 3 atmospheres. The temperature of the TiN after rapid cooling is maintained at about 300°C to obtain TiN material.

[0059] S3: Heat with water, soak in phosphoric acid solution

[0060] The TiN material obtained in step S2 is transferred to a hot-stifling pool for water-pumping and hot-stifling. During water-pumping and hot-stifling, 0.15 tons of water are pumped per ton of TiN material each time, and the pumping time is 20 minutes each time. After each pumping, the material is left to stand for 1 hour, and the water pumping cycle is repeated 3-5 times until the temperature of the TiN material drops to about 50°C. Subsequently, the material is soaked in a phosphoric acid solution with a mass content of 30% for 10 hours, and the material is turned over every 2 hours.

[0061] During the soaking process, TiN and H3PO4 react to generate TiP2O7, (NH4)3PO4, H2O and H2. The generated TiP2O7 is a solid material that is insoluble in water. (NH4)3PO4 dissolves in water to form an ammonium phosphate solution. H2O exists in the aqueous solution, and H2 is discharged in the form of gas. The separation is carried out by solid-liquid separation. TiP2O7 exists in the solid material and is separated from the (NH4)3PO4 liquid to obtain solid titanium pyrophosphate.

[0062] S4: Sodium hydroxide solution soaking and calcination

[0063] The solid titanium pyrophosphate obtained in step S3 is soaked in a sodium hydroxide solution with a mass content of 30%. The soaking temperature is controlled at 80° C., the soaking time is 3 hours, and the material is turned over once every 20 minutes during the soaking process.

[0064] During the soaking process, TiP2O7 and NaOH react to generate Ti(OH)4, Na3PO4 and H2O. The generated Ti(OH)4 is a solid material that is insoluble in water, while Na3PO4 is dissolved in water to form a solution. The Na3PO4 is separated by solid-liquid separation to obtain solid Ti(OH)4.

[0065] Solid Ti(OH)4 was calcined at high temperature, the calcination temperature was controlled at 600℃, the calcination time was controlled at 10h, and the material was turned over every 2h during the calcination process. During the calcination process, Ti(OH)4 decomposed into TiO2 and H2O, and the water was separated by solid-liquid separation. The solid material was TiO2, and the titanium recovery rate was 67.95%.

[0066] Example 3

[0067] The method for extracting titanium from carburized high-titanium blast furnace slag in this embodiment comprises the following steps:

[0068] S1: Reaction

[0069] The mass contents of the components in the non-carburized high-titanium blast furnace slag are as follows: TiO2 22-25%, CaO26-28%, MgO8-10%, Al2O3 12-15%, SiO2 22-25%, Fe2O3 2-3%, and TiO2 mainly exists in the form of CaTiO3.

[0070] Liquid non-carburized high-titanium blast furnace slag is placed in a vacuum furnace, and N2 is introduced to react at a constant temperature of 1500°C for 8 hours. CaTiO3 in the non-carburized high-titanium blast furnace slag reacts with N2 to produce Ca3N2, TiN, NO, and NO2, thereby obtaining a reaction mixture containing liquid Ca3N2 and semi-molten TiN and a mixed gas containing NO and NO2.

[0071] S2: Wind Quenching

[0072] After the reaction is completed, the furnace is taken out and the liquid Ca3N2 is first discharged through the slag trough; after the liquid Ca3N2 is discharged, the high-speed airflow valve at the outlet of the slag trough is opened, and the semi-molten TiN is rapidly cooled by the high-speed airflow. The temperature of the high-speed airflow is room temperature, the flow rate is 30,000 cubic meters / hour, and the wind pressure is 5 atmospheres. The temperature of the TiN after rapid cooling is maintained at about 400°C to obtain TiN material.

[0073] S3: Heat with water, soak in phosphoric acid solution

[0074] The TiN material obtained in step S2 is transferred to a hot-stifling pool for water-pumping and hot-stifling. During water-pumping and hot-stifling, 0.15 tons of water are pumped per ton of TiN material each time, and the pumping time is 25 minutes each time. After each pumping, the material is left to stand for 1 hour, and the water pumping cycle is repeated 3-5 times until the temperature of the TiN material drops to about 80°C. Subsequently, the material is soaked in a phosphoric acid solution with a mass content of 25% for 12 hours, and the material is turned over every 2 hours.

[0075] During the soaking process, TiN and H3PO4 react to generate TiP2O7, (NH4)3PO4, H2O and H2. The generated TiP2O7 is a solid material that is insoluble in water. (NH4)3PO4 dissolves in water to form an ammonium phosphate solution. H2O exists in the aqueous solution, and H2 is discharged in the form of gas. The separation is carried out by solid-liquid separation. TiP2O7 exists in the solid material and is separated from the (NH4)3PO4 liquid to obtain solid titanium pyrophosphate.

[0076] S4: Sodium hydroxide solution soaking and calcination

[0077] The solid titanium pyrophosphate obtained in step S3 is soaked in a sodium hydroxide solution with a mass content of 50%. The soaking temperature is controlled at 60° C., the soaking time is 2 h, and the material is turned over once every 20 min during the soaking process.

[0078] During the soaking process, TiP2O7 and NaOH react to generate Ti(OH)4, Na3PO4 and H2O. The generated Ti(OH)4 is a solid material that is insoluble in water, while Na3PO4 is dissolved in water to form a solution. The Na3PO4 is separated by solid-liquid separation to obtain solid Ti(OH)4.

[0079] Solid Ti(OH)4 was calcined at high temperature, the calcination temperature was controlled at 700℃, the calcination time was controlled at 8h, and the material was turned over every 2h during the calcination process. During the calcination process, Ti(OH)4 decomposed into TiO2 and H2O, and the water was separated by solid-liquid separation. The solid material was TiO2, and the titanium recovery rate was 66.12%.

[0080] Comparative Example 1

[0081] The process is the same as that of Example 1 except that in step S2, the semi-molten TiN is not quenched by wind, but is directly discharged and naturally cooled to about 360°C.

[0082] The results show that the titanium recovery rate of this comparative example method is 21.68%.

[0083] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for extracting titanium from non-carburized high-titanium blast furnace slag, characterized in that: The steps include: S1: placing liquid non-carburized high-titanium blast furnace slag in a vacuum furnace, introducing nitrogen gas for reaction, and obtaining a reaction mixture containing liquid Ca3N2 and semi-molten TiN and a mixed gas containing NO and NO2; S2: Discharging the liquid Ca3N2 and semi-molten TiN in the reaction mixture out of the vacuum furnace in sequence, and using a high-speed airflow to quench the semi-molten TiN in the process of discharging the semi-molten TiN to obtain a TiN material; S3: transferring the TiN material to a hot and stuffy tank, adding water to the hot and stuffy tank, and then soaking it in a phosphoric acid solution, and after soaking, separating the ammonium phosphate from the solid and liquid to obtain solid titanium pyrophosphate; S4: Soaking solid titanium pyrophosphate in sodium hydroxide solution, separating the solid from the liquid and calcining to obtain TiO2.

2. The method for extracting titanium from non-carburized high-titanium blast furnace slag according to claim 1, characterized in that: In step S1, the mass contents of the components in the carbide-free high-titanium blast furnace slag are as follows: TiO2 22-25%, CaO 26-28%, MgO 8-10%, Al2O3 12-15%, SiO2 22-25%, Fe2O3 2-3%, and TiO2 mainly exists in the form of CaTiO3.

3. The method for extracting titanium from non-carburized high-titanium blast furnace slag according to claim 1, characterized in that: In step S1, the reaction temperature is 1400-1500° C. and the reaction time is 8-10 h.

4. The method for extracting titanium from non-carburized high-titanium blast furnace slag according to claim 1, characterized in that: In step S2, the temperature of the high-speed airflow is room temperature, the flow rate is 20,000-30,000 cubic meters per hour, and the wind pressure is 3-5 atmospheres.

5. The method for extracting titanium from non-carburized high-titanium blast furnace slag according to claim 1, characterized in that: In step S2, the temperature of TiN after wind quenching is controlled to be 300-400°C.

6. The method for extracting titanium from non-carburized high-titanium blast furnace slag according to claim 1, characterized in that: In step S3, when pumping water and heating, the amount of water pumped per ton of TiN material is 0.1-0.15 tons, and the pumping time is 20-30 minutes. After each pumping, it is left to stand for 1 hour, and the pumping cycle is 3-5 times.

7. The method for extracting titanium from non-carburized high-titanium blast furnace slag according to claim 1, characterized in that: In step S3, water is added to heat the TiN material until the temperature drops to 50-100°C.

8. The method for extracting titanium from non-carburized high-titanium blast furnace slag according to claim 1, characterized in that: In step S3, the mass content of the phosphoric acid solution is 25-30%; and the immersion time of the phosphoric acid solution is 10-12 hours.

9. The method for extracting titanium from non-carburized high-titanium blast furnace slag according to claim 1, characterized in that: In step S4, the mass content of the sodium hydroxide solution is 30-50%; the immersion temperature of the sodium hydroxide solution is 60-80° C., and the immersion time is 2-3 hours.

10. The method for extracting titanium from non-carburized high-titanium blast furnace slag according to claim 1, characterized in that: In step S4, the calcination temperature is 600-700° C. and the calcination time is 8-10 hours.

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