A sintering method of vanadium-titanium ore with high-aluminum iron ore

Abstract

The invention belongs to the field of metallurgy, and discloses a sintering method of vanadium-titanium ore with high-aluminum iron ore. The method comprises: blending iron ore to obtain a mixture; mixing and granulating the mixture, fuel and flux to obtain a sintering material; and sintering the sintering material to obtain a sintered ore. The invention adjusts the blending structure and proportion of the iron ore, controls the sintering parameters, and controls the Al2O3 content and TiO2 content of the sintered ore within a suitable range, without affecting the comprehensive sintering effect and smelting indicators, and can make full use of low-quality iron ore resources in nature, solve the problem of shortage of high-quality iron ore, and reduce smelting costs.

Description

Technical Field

[0001] The invention belongs to the field of metallurgy, and in particular relates to a sintering method of vanadium-titanium ore with high-aluminum iron ore. Background Art

[0002] With the excessive development and expansion of the steel industry, the natural high-quality iron ore resources with high iron grade and low impurity content are becoming less and less. Some low-quality ores with low grade or high impurity content are constantly mined and used. High-aluminum iron ore is a kind of low-quality ore. Its main characteristics are high Al2O3 content, increased sintering melting point during sintering, small amount of liquid phase, high liquid phase viscosity, poor fluidity, slow expansion speed, affecting the strength of sintered ore and low-temperature reduction powderization rate. Vanadium-titanium ore sintering has the characteristics of high TiO2 content and high Al2O3 content, which also affect the sintering melting point, sintered ore strength and metallurgical properties. How to use vanadium-titanium ore with high-aluminum iron ore without causing serious deterioration of sintered ore quality and comprehensive effect is a major problem of sintering. Low-quality iron ore such as high-aluminum iron ore has the advantage of low price. If it can be used well without affecting the comprehensive sintering effect, it can reduce the cost of raw materials and produce considerable economic benefits.

[0003] CN201911144878.1 (A method for producing sintered ore from high-aluminum iron ore powder) adopts a composite agglomeration method for sintering, preforming high-aluminum iron ore powder into small balls, and then mixing with other raw materials that have not been pre-granulated for sintering. This method will complicate the process, be difficult, have many accidents, high maintenance costs and manufacturing costs, and the effect of eliminating the influence of Al2O3 is not obvious. The composite agglomeration process is different from the conventional sintering process. It is a product that combines pelletizing and sintering processes, and it is difficult to promote and apply.

[0004] CN202310249656.6 (An additive for improving the sintering of high-proportion high-aluminum iron ore powder and its application) adds the additive MgF2 (similar to fluorite) to the sintering material. Although it may reduce the melting point of high-aluminum iron ore, due to the presence of F element and CaO, lanceolite (3CaO·2SiO2·CaF2) will inevitably be produced in the sintered ore, which will deteriorate the strength and metallurgical properties of the sintered ore. F2 also pollutes the environment. As a result, the overall effect of eliminating or reducing the influence of Al2O3 is not good.

[0005] CN201610821531.6 (A method for improving the efficiency of blast furnace smelting high-aluminum iron ore by using high-reactivity coke), this method aims at the problems of poor permeability, widened soft melting zone, and difficult slag-iron separation in blast furnace smelting of high-aluminum iron ore, by using high-reactivity coke to replace ordinary metallurgical coke to make coke diced and load it into the blast furnace. Due to the excellent reactivity of high-reactivity coke diced, the temperature of the heat reserve area can be reduced, the pre-reduction degree of iron-containing furnace charge can be increased, the FeO content in the primary slag phase containing Al2O3 can be reduced, the melting point of the primary slag phase containing Al2O3 can be increased, the melting zone can be narrowed, the soft melting zone can be moved downward, and the permeability of the material layer can be further improved on the basis of mixed ore and coke, so as to achieve the purpose of improving the efficiency of blast furnace smelting of high-aluminum iron ore. This method mainly improves the smelting process from the perspective of charging, and does not analyze and solve the above problems from the perspective of sintering process.

[0006] The document "Study on the Behavior of Al2O3 in Vanadium-Titanium Sintered Ore" (Iron and Steel, 2003, No. 1, pp. 1-4) uses the addition of chemically pure Al2O3 to control the Al2O3 content of the sintered ore within a certain range. When other conditions remain unchanged, as the Al2O3 content increases, the sintering rate, sintered ore strength, finished product rate, and utilization coefficient all decrease, and the mineral composition and metallurgical properties of the sintered ore deteriorate. Although the document discloses the influence of different Al2O3 contents on the quality and metallurgical properties of vanadium-titanium ore, it does not propose measures or methods to eliminate these influences, nor does it involve the ore blending and sintering parameter control method for high-aluminum iron ore with Al2O3 content of more than 5%.

[0007] Therefore, it is necessary to provide a sintering method for vanadium-titanium ore with high-aluminum iron ore. By optimizing the ore blending and controlling the sintering parameters, the Al2O3 content and TiO2 content can be controlled within an appropriate range without affecting the comprehensive sintering effect and smelting indicators. It can also make full use of natural low-quality iron ore resources, solve the problem of shortage of high-quality iron ore, and achieve economic smelting and sustainable development. Summary of the invention

[0008] In order to overcome the defects of the above-mentioned prior art, the purpose of the present invention is to provide a sintering method of vanadium-titanium ore with high-aluminum iron ore. By optimizing the ore blending and controlling the sintering parameters, the Al2O3 content and the TiO2 content are controlled within an appropriate range without affecting the comprehensive sintering effect and smelting indicators, and the low-quality iron ore resources in nature can be fully utilized to solve the problem of shortage of high-quality iron ore and achieve economic smelting and sustainable development.

[0009] To achieve the above object, the present invention provides the following technical solutions:

[0010] A sintering method of vanadium-titanium ore with high-aluminum iron ore comprises the following steps:

[0011] batching of iron ore, fuel and flux;

[0012] The iron ore, fuel and flux are mixed and granulated according to the ingredients to obtain a mixed material;

[0013] Sintering the mixed material to obtain sintered ore;

[0014] Among them, iron ore includes vanadium-titanium ore, high-aluminum iron ore and other iron ores, and other iron ores include metallurgical waste;

[0015] The mixed material contains 30-55wt% vanadium-titanium ore, 1-40wt% high-aluminum iron ore, 0-40wt% other iron ores, and the remainder is fuel and flux;

[0016] The TiO2 content in the vanadium-titanium ore is 10-13wt%, the Al2O3 content is 2-4wt%, the FeO content is 25-35wt%, and the content of the particle size <200 mesh in the vanadium-titanium ore is 60-80wt%;

[0017] The Al2O3 content in high-alumina iron ore is 5-9wt%;

[0018] The TiO2 content in other iron ores is less than 0.5wt% and the Al2O3 content is less than 3wt%;

[0019] The Al2O3 content in the sintered ore is 1-7wt%, and the TiO2 content is 5-10wt%.

[0020] Further, the sintering material is sintered to obtain sintered ore, comprising:

[0021] Taking the sintering parameters of the mixed material without high-aluminum iron ore as a benchmark, adjusting the sintering parameters of the mixed material with high-aluminum iron ore according to the benchmark;

[0022] Among them, the standards include: carbon content of the mixture is 2.5-4.0wt%, moisture content of the mixture is 6.8-7.8wt%, material layer thickness is 600-800mm, ignition temperature is 1000-1100℃, and negative pressure is 14-17.5kPa.

[0023] Further, the sintering parameters of the mixed material using high-aluminum iron ore are adjusted according to the benchmark, including:

[0024] Compared with the benchmark, the carbon content of the mixture increases by 0.05-0.35%, the moisture content of the mixture increases by 0.05-0.5%, the material layer thickness increases by 10-50mm, the ignition temperature increases by 10-50℃, and the negative pressure increases by 0.1-3kPa.

[0025] Furthermore, the Al2O3 content in the sintered ore is 3-4wt%, and the TiO2 content is 5-8wt%.

[0026] Further, the mixed material is sintered to obtain sintered ore, comprising:

[0027] Before sintering, the material is laid and ignited;

[0028] After sintering, the obtained hot sintered ore is crushed, cooled and screened to obtain sintered ore.

[0029] Technical effects and advantages of the present invention:

[0030] The present invention adjusts the iron ore blending structure and proportion, controls the sintering parameters, and controls the Al2O3 content and TiO2 content of the sintered ore within a suitable range without affecting the comprehensive sintering effect and smelting indicators, while making full use of low-quality iron ore resources in nature, solving the problem of shortage of high-quality iron ore, and reducing smelting costs.

[0031] Other features and advantages of the present invention will be described in the following description, and partly become obvious from the description, or be understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 The present invention is a flow chart of a sintering method of vanadium-titanium ore with high-aluminum iron ore. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not 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.

[0034] like Figure 1 As shown, the present invention provides a sintering method of vanadium-titanium ore with high-aluminum iron ore, comprising:

[0035] batching of iron ore, fuel and flux;

[0036] Mixing and granulating the iron ore, fuel and flux according to the ingredients to obtain a mixed material;

[0037] Sintering the mixed material to obtain sintered ore;

[0038] Wherein, the iron ore includes vanadium-titanium ore, high-aluminum iron ore and other iron ores, and other iron ores include metallurgical waste;

[0039] The mixed material contains 30-55wt% vanadium-titanium ore, 1-40wt% high-aluminum iron ore, 0-40wt% other iron ores, and the remainder is fuel and flux;

[0040] The TiO2 content in the vanadium-titanium ore is 10-13wt%, the Al2O3 content is 2-4wt%, the FeO content is 25-35wt%, and the content of the particle size <200 mesh in the vanadium-titanium ore is 60-80wt%;

[0041] The Al2O3 content in high-alumina iron ore is 5-9wt%;

[0042] The TiO2 content in other iron ores is less than 0.5wt% and the Al2O3 content is less than 3wt%;

[0043] The Al2O3 content in the sintered ore is 1-7wt%, and the TiO2 content is 5-10wt%.

[0044] In some embodiments of the present invention, sintering the mixed material to obtain sintered ore includes:

[0045] The sintering parameters of the mixture without high-aluminum iron ore are used as a benchmark, and the sintering parameters of the mixture with high-aluminum iron ore are adjusted according to the benchmark. Once the benchmark is determined, the sintering parameters of the mixture with high-aluminum iron ore can be immediately determined;

[0046] Among them, the standards include: carbon content of the mixture is 2.5-4.0wt%, moisture content of the mixture is 6.8-7.8wt%, material layer thickness is 600-800mm, ignition temperature is 1000-1100℃, and negative pressure is 14-17.5kPa.

[0047] In some embodiments of the present invention, adjusting the sintering parameters of the mixed material using high-aluminum iron ore according to the benchmark includes:

[0048] Compared with the benchmark, the carbon content of the mixture increases by 0.05-0.35%, the moisture content of the mixture increases by 0.05-0.5%, the thickness of the material layer increases by 10-50mm, the ignition temperature increases by 10-50℃, and the negative pressure increases by 0.1-3kPa. After using high-aluminum iron ore, by appropriately increasing the carbon content and the sintering temperature, the liquid phase volume can be increased, and by appropriately increasing the moisture content, the granulation can be strengthened, and by appropriately increasing the material layer, the high temperature holding time and the crystallization time can be extended. By appropriately increasing the ignition temperature, the defect of the high melting point of the high-aluminum iron ore can be eliminated and alleviated, and the negative pressure can be appropriately increased to cope with the problem of increased resistance after the material layer is increased.

[0049] In some embodiments of the present invention, the Al2O3 content in the sintered ore is 3-4wt%, and the TiO2 content is 5-8wt%.

[0050] In some embodiments of the present invention, sintering the mixed material to obtain sintered ore includes:

[0051] Before sintering, the material is laid and ignited;

[0052] After sintering, before and after sintering, the obtained hot sintered ore is crushed, cooled and screened to obtain sintered ore.

[0053] In order to better explain the present invention, the following comparative examples and embodiments are provided.

[0054] The chemical composition of the high-aluminum iron ore: TFe content 56.44wt%, FeO content 1.32wt%, SiO2 content 6.92wt%, CaO content 0.44wt%, MgO content 0.42wt%, Al2O3 content 6.62wt%, V2O5 content 0wt%, TiO2 content 0.22wt%, Ig (burn loss) 3.06wt%, particle size range 0-10mm, average particle size 4.68mm. The high-aluminum iron ore used in the embodiment of the present invention has an Al2O3 content of up to 6.62wt%, which is a typical high-aluminum hematite and a natural rich ore powder.

[0055] The chemical composition of vanadium-titanium ore: TFe content 53.5wt%, FeO3 content 1.21wt%, SiO2 content 3.54wt%, CaO content 1.21wt%, MgO content 2.87wt%, Al2O3 content 3.88wt%, V2O5 content 0.582wt%, TiO2 content 12.55wt%, Ig (burn loss) -1.0wt%, particle size: 200 mesh content 60-80wt%, the vanadium-titanium ore used in the embodiment of the present invention has a TiO2 content of up to 12.55wt%, and an Al2O3 content of up to 3.88wt%, and is a high-titanium vanadium-titanium magnetite concentrate.

[0056] The chemical composition of the returned ore: TFe content 49.80wt%, FeO content 8.2wt%, SiO2 content 5.58wt%, CaO content 11.07wt%, MgO content 2.58wt%, Al2O3 content 3.43wt%, V2O5 content 0.33wt%, TiO2 content 6.07wt%.

[0057] Iron ore includes: vanadium-titanium ore + high-aluminum iron ore + other iron ores (including metallurgical waste).

[0058] Fuels include: coke powder, anthracite, or coke powder + anthracite.

[0059] The flux includes: limestone, quicklime, activated ash, or limestone + quicklime, or limestone + quicklime + activated ash, or limestone + activated ash.

[0060] Comparative Example

[0061] S1: According to the total mass of iron ore, fuel and flux, vanadium-titanium ore 45.31wt% + high-aluminum iron ore 0wt% + other ores (A ore 1.56wt% + B ore 36.46wt%) + (limestone 4.17wt% + quicklime 5.21wt% + active ash 2.08wt%) + (coke powder 3.65wt% + anthracite 1.56wt%),

[0062] Then, return ore (45% of the total mass of iron ore, fuel and flux) is added for batching.

[0063] S2: Quicklime (CaO content 85wt%) and active ash (CaO content 92wt%) are digested with water in a specific dissolver to generate Ca(OH)2, which are then discharged into a primary mixer and a secondary mixer in sequence together with the ingredients. Appropriate amount of water is added to the primary mixer and the secondary mixer as needed for mixing and granulation.

[0064] S3: Set sintering parameters

[0065] Carbon preparation: The total mass of iron ore, fuel, flux and return ore contains 3.43wt% fixed carbon, moisture: 7.30wt% of the total mass of iron ore, fuel, flux and return ore, material layer: 730mm, ignition temperature: 1010℃, negative pressure: 15.5KPa.

[0066] S4: The sintered material obtained after batching and mixing is subjected to processes such as distribution, ignition, and (exhaust) sintering on a sintering device (sintering machine) to obtain hot sintered ore, which is then thermally crushed and cooled on a cooling device (exhaust or blast cooler). The sintered ore is screened multiple times and transported to a blast furnace for smelting, and is screened under the trench once more before entering the furnace.

[0067] Example 1

[0068] S1: According to the total mass of iron ore, fuel and flux, vanadium-titanium ore 44.54wt% + high-aluminum iron ore 7.28wt% + other ores (B ore 31.43wt%) + (limestone 4.16wt% + quicklime 5.20wt% + active ash 2.08wt%) + (coke powder 3.75wt% + anthracite 1.56wt%),

[0069] Then, return ore (45% of the total mass of iron ore, fuel and flux) is added for batching.

[0070] S2: Add water to quicklime (CaO content 85wt%) and active ash (CaO content 92wt%) in a specific mixer to digest and generate Ca(OH)2, which are then discharged into a primary mixer and a secondary mixer in sequence together with the ingredients. Add appropriate amount of water to the primary mixer and the secondary mixer as needed, mix and granulate to obtain sintering material.

[0071] S3: Set sintering parameters

[0072] Carbon preparation: The total mass of iron ore, fuel, flux and return ore contains 3.51wt% fixed carbon; Water: 7.35wt% of the total mass of iron ore, fuel, flux and return ore; Material layer: 740mm; Ignition temperature: 1020℃; Negative pressure: 15.8KPa.

[0073] S4: The sintered material obtained after batching and mixing is subjected to processes such as distribution, ignition, and (exhaust) sintering on a sintering device (sintering machine) to obtain hot sintered ore, which is then thermally crushed and cooled on a cooling device (exhaust or blast cooler). The sintered ore is screened multiple times and transported to a blast furnace for smelting, and is screened under the trench once more before entering the furnace.

[0074] Example 2

[0075] S1: According to the total mass of iron ore, fuel and flux, vanadium-titanium ore 45.32wt% + high-aluminum iron ore 15.70wt% + other ores (B ore 22.14wt%) + (limestone 4.6wt% + quicklime 5.20wt% + active ash 2.08wt%) + (coke powder 3.79wt% + anthracite 1.61wt%),

[0076] Then, return ore (45% of the total mass of iron ore, fuel and flux) is added for batching.

[0077] S2: Add water to quicklime (CaO content 85wt%) and active ash (CaO content 92wt%) in a specific mixer to digest and generate Ca(OH)2, which is then discharged into the primary mixer and the secondary mixer in sequence together with the ingredients. Add appropriate amount of water to the primary mixer and the secondary mixer as needed for mixing and granulation.

[0078] S3: Set sintering parameters

[0079] Carbon preparation: The total mass of iron ore, fuel, flux and return ore contains 3.59wt% fixed carbon; Water: 7.40wt% of the total mass of iron ore, fuel, flux and return ore; Material layer: 750mm; Ignition temperature: 1030℃; Negative pressure: 16.0KPa.

[0080] S4: The sintered material obtained after batching and mixing is subjected to processes such as distribution, ignition, and (exhaust) sintering on a sintering device (sintering machine) to obtain hot sintered ore, which is then thermally crushed and cooled on a cooling device (exhaust or blast cooler). The sintered ore is screened multiple times and transported to a blast furnace for smelting, and is screened under the trench once more before entering the furnace.

[0081] Example 3

[0082] S1: According to the total mass of iron ore, fuel and flux, vanadium-titanium ore 48.37wt% + high-aluminum iron ore 34.67wt% + other ores 0wt% + (limestone 4.15wt% + quicklime 5.19wt% + active ash 2.08wt%) + (coke powder 3.84wt% + anthracite 1.71wt%),

[0083] Then, return ore (45% of the total mass of iron ore, fuel and flux) is added for batching.

[0084] S2: Add water to quicklime (CaO content 85wt%) and active ash (CaO content 92wt%) in a specific mixer to digest and generate Ca(OH)2, which is then discharged into the primary mixer and the secondary mixer in sequence together with the ingredients. Add appropriate amount of water to the primary mixer and the secondary mixer as needed for mixing and granulation.

[0085] S3: Set sintering parameters

[0086] Carbon blending: The total mass of iron ore, fuel, flux and return ore contains 3.71wt% fixed carbon; Water: 7.46wt% of the total mass of iron ore, fuel, flux and return ore; Material layer: 760mm; Ignition temperature: 1045℃; Negative pressure: 16.3KPa.

[0087] S4: The sintered material obtained after batching and mixing is subjected to processes such as distribution, ignition, and (exhaust) sintering on a sintering device (sintering machine) to obtain hot sintered ore, which is then thermally crushed and cooled on a cooling device (exhaust or blast cooler). The sintered ore is screened multiple times and transported to a blast furnace for smelting, and is screened under the trench once more before entering the furnace.

[0088] Since each group of embodiments has multiple technical indicators, it is not possible to conclude that the ore blending and sintering effect of this group is the best based on a certain indicator. A comprehensive evaluation must be conducted. The comprehensive index method commonly used at home and abroad is adopted. The comprehensive index I = w1p1+w2p2+…+w n p n, where w is the weight, p is the individual index, and the weight is determined by expert experience. The individual index p of high-quality indicators (the higher the index, the better, such as drum index) is calculated by the quotient of the measured value X and the standard value M, that is, p = X / M; the individual index p of low-quality indicators (the lower the index, the better, such as solid fuel consumption) is calculated by the quotient of the standard value M and the measured value X, that is, p = M / X. The standard value is the optimal value of the indicator. The indicators currently under investigation are utilization coefficient, drum index, yield rate, and solid fuel consumption. The weight distribution is 25:25:25:25. The comprehensive index I is calculated. The higher the I value, the better the effect. According to the comprehensive evaluation method, the weight does not affect the ranking of the comprehensive effect.

[0089] Table 1

[0090]

[0091] Table 2

[0092] Example TFe FeO CaO <![CDATA[SiO2]]> Ro MgO <![CDATA[Al2O3]]> <![CDATA[V2O5]]> <![CDATA[TiO2]]> Comparative Example 50.36 8.22 11.27 5.10 2.21 2.49 3.56 0.31 6.02 Example 1 50.37 8.15 11.37 5.12 2.22 2.33 3.59 0.30 5.96 Example 2 50.31 8.16 11.29 5.11 2.21 2.35 3.58 0.31 6.06 Example 3 50.29 8.29 11.23 5.06 2.22 2.33 3.61 0.31 6.12

[0093] The comprehensive evaluation indexes of the comparative examples and the embodiments are shown in Table 1, and the mass percentages of the sintered ore components are shown in Table 2.

[0094] As shown in Table 1 and Table 2, the comprehensive index of the comparative example is 99.22, and the comprehensive indexes of the embodiments are 99.29, 99.21 and 99.25 respectively. The Al2O3 content in the sintered ore of the comparative example is 3.56wt%, and the TiO2 content is 6.02wt%. The Al2O3 content in the sintered ore of the embodiment is 3.59wt%, 3.58wt%, and 3.61wt%, respectively, and the TiO2 content is 5.96wt%, 6.06wt%, and 6.12wt%, respectively. The Al2O3 content of the high-aluminum iron ore in the embodiment is as high as 6.62wt%. After optimizing the ore matching and controlling the sintering parameters, the main technical indicators of sintering and the composition of the sintered ore are basically consistent with the comparative example, and no degradation or deterioration occurs, so that the blast furnace charge structure and slag composition can be kept stable, and the blast furnace is not affected. As a kind of low-quality ore, high-aluminum iron ore has the advantages of low price, high cost performance and good economy compared with A ore and B ore. It can reduce the raw material cost of steel mills and generate significant economic benefits.

[0095] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A sintering method of vanadium-titanium ore with high-aluminum iron ore, characterized in that: The following steps are involved: batching of iron ore, fuel and flux; The iron ore, fuel and flux are mixed and granulated according to the ingredients to obtain a mixed material; Sintering the mixture to obtain sintered ore, comprising: taking the sintering parameters of the mixture without high-aluminum iron ore as a benchmark, adjusting the sintering parameters of the mixture using high-aluminum iron ore according to the benchmark, and compared with the benchmark, the carbon content of the mixture is increased by 0.05-0.35%, the moisture content of the mixture is increased by 0.05-0.5%, the thickness of the material layer is increased by 10-50 mm, the ignition temperature is increased by 10-50° C., and the negative pressure is increased by 0.1-3 kPa; Wherein, the iron ore includes vanadium-titanium ore, high-aluminum iron ore and other iron ores, and the other iron ores include metallurgical waste; The mixture contains 30-55wt% vanadium-titanium ore, 1-40wt% high-aluminum iron ore, 0-40wt% other iron ore, and the remainder is fuel and flux; The vanadium-titanium ore has a TiO2 content of 10-13wt%, an Al2O3 content of 2-4wt%, and a FeO content of 25-35wt%, and a particle size content of <200 mesh in the vanadium-titanium ore of 60-80wt%; The Al2O3 content in the high-aluminum iron ore is 5-9wt%; The other iron ores have a TiO2 content of less than 0.5wt% and an Al2O3 content of less than 3wt%; The Al2O3 content in the sintered ore is 1-7wt%, and the TiO2 content is 5-10wt%.

2. The sintering method of vanadium-titanium ore with high-aluminum iron ore according to claim 1, characterized in that: The standards include: a carbon content standard of the mixture of 2.5-4.0wt%, a moisture content standard of the mixture of 6.8-7.8wt%, a material layer thickness standard of 600-800mm, an ignition temperature standard of 1000-1100°C, and a negative pressure standard of 14-17.5kPa.

3. The sintering method of vanadium-titanium ore with high-aluminum iron ore according to claim 1, characterized in that: The Al2O3 content in the sintered ore is 3-4wt%, and the TiO2 content is 5-8wt%.

4. The sintering method of vanadium-titanium ore with high-aluminum iron ore according to claim 1, characterized in that: The method of sintering the mixed material to obtain sintered ore comprises: Before sintering, the material is laid and ignited; After sintering, the obtained hot sintered ore is crushed, cooled and screened to obtain sintered ore.

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