Method for reducing impurities and aluminum consumption in ferrovanadium alloy smelting

Abstract

The invention provides a method for reducing impurities and aluminum consumption in ferrovanadium smelting, which comprises the following steps: A) pouring particle steel subjected to coarse screening into water for physical separation to obtain a first screened material with the particle size of less than or equal to 2.5 mm, a second screened material with the particle size of more than 2.5 mm and less than or equal to 25 mm and a third screened material with the particle size of more than 25 mm; b) carrying out shaking table separation on the first screened material to obtain quality-improved particle steel powder and vanadium slag; the second screening material is sorted through a jigger, and quality-improved steel particles and vanadium slag are obtained; the third screened material is subjected to high-pressure water spraying cleaning, and quality-improved particle steel blocks and vanadium slag are obtained; and C) drying the quality-improved particle steel powder, the quality-improved particle steel particles and the quality-improved particle steel blocks, mixing the dried quality-improved particle steel powder, quality-improved particle steel particles and quality-improved particle steel blocks with ferrovanadium smelting raw materials in proportion, and smelting to obtain the ferrovanadium alloy. According to the method, on the premise that the yield is not affected, the problem that in the process of smelting ferrovanadium from particle steel, aluminum consumption is high is solved, and the problem that the vanadium content in the alloy fluctuates greatly is solved.

Description

Technical Field

[0001] The invention belongs to the field of vanadium metallurgy, and in particular relates to a method for reducing impurities and aluminum consumption in vanadium-ferroalloy smelting. Background Art

[0002] In the iron and steel metallurgical industry, steel particles separated from steel slag and vanadium slag during converter smelting are easy to melt, have good fluidity, and have a moderate particle size. They can replace scrap steel and be used as a key component of ferrous raw materials for vanadium-ferroalloys and iron-containing refining agents. Currently, vanadium-ferroalloys are mainly smelted using the electroaluminothermic method, and its main raw materials are vanadium oxide, iron raw materials, aluminum reducing agents, and lime. Existing ferrovanadium smelting technology often directly uses steel particles separated from vanadium slag or steel slag as iron raw materials. Although this practice can reduce the cost of iron raw materials, it often brings the risk of increased silicon and titanium impurity content in ferrovanadium alloys, large vanadium losses in the slag, large fluctuations in the main element composition, and increased aluminum consumption, affecting product quality, vanadium yield, and the cost of aluminum reducing agents. Excessive aluminum consumption is a pain point that affects the profits of vanadium-ferroalloy production companies. The existing methods to reduce aluminum consumption per ton of vanadium-ferroalloy smelting mainly focus on providing pre-reduction furnace charges, chemical treatment to reduce impurity oxides, and reducing splashing during the smelting process. These measures to control aluminum consumption from the source and process are numerous, but there are still common problems such as low yield, high silicon and titanium impurities, high aluminum consumption, and large fluctuations in the main element composition. Summary of the Invention

[0003] The purpose of the present invention is to provide a method for reducing impurities and aluminum consumption in vanadium-ferroalloy smelting. The method of the present invention can effectively solve the problems of high silicon and titanium impurities in the product and high aluminum consumption in the vanadium-ferroalloy smelting process using particle steel.

[0004] The present invention provides a method for reducing impurities and aluminum consumption in ferrovanadium smelting, comprising the following steps:

[0005] A) pouring the coarsely screened steel particles into water for physical separation to obtain a first screening material, a second screening material, and a third screening material;

[0006] The particle size of the first screened material is ≤2.5 mm, the particle size of the second screened material is >2.5 mm and ≤25 mm, and the particle size of the third screened material is >25 mm;

[0007] B) subjecting the first screened material to shaking table sorting at a bed inclination of 3° to 5° and a horizontal flushing water flow of 2 to 6 L / min to obtain upgraded particle steel powder and vanadium slag;

[0008] The second screened material is subjected to jig separation, with the jig having a maximum eccentric stroke of 10 to 30 mm and a stroke frequency of 300 to 500 times / min, to obtain quality-improved steel particles and vanadium slag;

[0009] The third screened material is cleaned by high-pressure water spraying at a jet pressure of 20 to 80 MPa to obtain upgraded particle steel blocks and vanadium slag;

[0010] C) drying the upgraded steel powder, upgraded steel pellets and upgraded steel blocks, and mixing them with ferrovanadium smelting raw materials according to a proportion, and smelting them to obtain ferrovanadium alloy.

[0011] Preferably, the temperature of the coarsely screened steel particles is 100-300°C.

[0012] Preferably, the particle size of the coarsely screened steel particles is less than 45 mm.

[0013] Preferably, the drying temperature of the upgraded particle steel powder, upgraded particle steel pellets and upgraded particle steel blocks in step C) is 100-700°C.

[0014] Preferably, the upgraded particle steel powder, upgraded particle steel grains and upgraded particle steel blocks are dried using the waste heat of the vanadium-ferrocorundum slag or alloy cake.

[0015] Preferably, the moisture content of the dried upgraded particle steel powder, upgraded particle steel pellets and upgraded particle steel blocks is less than 0.05 wt %.

[0016] Preferably, during the smelting process, the amount of silicon component added to the refining agent is 20-100 kg / t.

[0017] Preferably, during the smelting process, the aluminum consumption per ton of vanadium iron is 290-570 kg.

[0018] Preferably, the impurities in the vanadium-iron alloy are Si impurities and Ti impurities.

[0019] Preferably, in the vanadium-iron alloy, the Si content is 0.3% to 1.5%, and the Ti content is 0.01% to 0.15%.

[0020] The present invention provides a method for reducing impurities and aluminum consumption in ferrovanadium smelting, comprising the following steps: A) pouring coarsely screened granular steel into water for physical separation to obtain a first screened material, a second screened material, and a third screened material; the particle size of the first screened material is ≤2.5mm, the particle size of the second screened material is greater than 2.5mm and ≤25mm, and the particle size of the third screened material is greater than 25mm; B) subjecting the first screened material to separation on a shaking table, with a bed surface inclination of 3° to 5° and a horizontal flushing water volume of 2 to 6L / mi n, obtaining upgraded particle steel powder and vanadium slag; subjecting the second screened material to jig sorting, with the jig having a maximum eccentric stroke of 10 to 30 mm and a stroke rate of 300 to 500 times / min, to obtain upgraded particle steel pellets and vanadium slag; subjecting the third screened material to high-pressure water spray cleaning, with a jet pressure of 20 to 80 MPa, to obtain upgraded particle steel blocks and vanadium slag; C) drying the upgraded particle steel powder, upgraded particle steel pellets, and upgraded particle steel blocks, and then mixing them with ferrovanadium smelting raw materials according to a proportion, and smelting to obtain ferrovanadium alloy.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] (1) Due to frictional heat generation, the particle steel still has a surface temperature of 100-300°C after coming out of the ball mill. It is immediately cooled in water. According to the principle of thermal expansion and contraction, rapid cooling treatment can promote the stripping of the entrained vanadium slag. By utilizing the significant difference between the physical properties of vanadium slag (density and particle size) and the physical properties of the particle steel metal matrix (density and particle density), a technical solution for obtaining improved particle steel (powder, granules, blocks) by physical sorting is proposed. After physical sorting, improved particle steel (powder, granules, blocks) is obtained for use in ferrovanadium smelting, which is from the source. It avoids the occurrence of a large number of side reactions such as thermite reaction 3FeV2O4+8Al=3Fe+6V+4Al2O3, 4Al+3TiO2=2Al2O3+3Ti, 3SiO2+Al=2Al2O3+3Si, which are caused by the vanadium-ferroin spinel and silicon-titanium impurities in the vanadium slag. It reduces the silicon and titanium impurity loads entering the furnace. On the premise of ensuring that the yield is not affected, it effectively solves the problem of high aluminum consumption in the process of smelting vanadium-ferroin by directly using untreated particle steel.

[0023] (2) Under the premise of ensuring that the yield is not affected, the problem of large fluctuations in vanadium content in the alloy caused by the introduction of impurities such as silicon and titanium is solved, the stability of the narrow range fluctuation of the main element content is improved, and the large deviation (>0.5%) between the user-side detection and the warranty is avoided, thereby improving customer satisfaction;

[0024] (3) The refining process window for adjusting the amount of silicon component in the refining agent during the slag depletion period was expanded, the depletion effect of ferrovanadium slag was improved, the vanadium yield was increased by 0.68 to 1.04 percentage points, and the product quality stability and market competitiveness were improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0026] Figure 1 Schematic diagram of the separation of coarsely screened steel particles in the present invention. DETAILED DESCRIPTION

[0027] The present invention provides a method for reducing impurities and aluminum consumption in ferrovanadium smelting, comprising the following steps:

[0028] A) pouring the coarsely screened steel particles into water for physical separation to obtain a first screening material, a second screening material, and a third screening material;

[0029] The particle size of the first screened material is ≤2.5 mm, the particle size of the second screened material is >2.5 mm and ≤25 mm, and the particle size of the third screened material is >25 mm;

[0030] B) subjecting the first screened material to shaking table sorting at a bed inclination of 3° to 5° and a horizontal flushing water flow of 2 to 6 L / min to obtain upgraded particle steel powder and vanadium slag;

[0031] The second screened material is subjected to jig separation, with the jig having a maximum eccentric stroke of 10 to 30 mm and a stroke frequency of 300 to 500 times / min, to obtain quality-improved steel particles and vanadium slag;

[0032] The third screened material is cleaned by high-pressure water spraying at a jet pressure of 20 to 80 MPa to obtain upgraded particle steel blocks and vanadium slag;

[0033] C) drying the upgraded steel powder, upgraded steel pellets and upgraded steel blocks, and mixing them with ferrovanadium smelting raw materials according to a proportion, and smelting them to obtain ferrovanadium alloy.

[0034] In the present invention, the particle steel is a roughing particle steel, which is separated from steel slag or vanadium slag. Figure 1 As shown, the particle steel contains minerals such as pseudobrookite, spinel and silicate, and the particle size of the particle steel is preferably less than 45 mm.

[0035] The present invention pours the coarsely selected particle steel into water for physical separation, and screens to obtain a first screened material, a second screened material, and a third screened material;

[0036] The particle size of the first screening material is ≤2.5 mm, the particle size of the second screening material is >2.5 mm and ≤25 mm, and the particle size of the third screening material is >25 mm.

[0037] In the present invention, the first screened material is subjected to shaking table sorting to obtain upgraded particle steel powder and vanadium slag. The shaking table sorting preferably has a bed inclination angle of 3° to 5°, such as 3°, 4°, or 5°, preferably a range with any of the above values ​​as the upper or lower limit; the horizontal flushing water volume is preferably 2 to 6 L / min, more preferably 3 to 5 L / min, such as 2 L / min, 3 L / min, 4 L / min, 5 L / min, or 6 L / min, preferably a range with any of the above values ​​as the upper or lower limit.

[0038] In the present invention, the second screened material is subjected to jig separation to obtain upgraded steel particles and vanadium slag.

[0039] In the present invention, the eccentric maximum stroke of the jig is preferably 10-30 mm, more preferably 15-25 mm, such as 10 mm, 15 mm, 20 mm, 25 mm, 30 mm, preferably a range value with the above arbitrary values ​​as the upper or lower limit; the stroke frequency is preferably 300-500 times / min, more preferably 350-450 times / min, such as 300 times / min, 350 times / min, 400 times / min, 450 times / min, 500 times / min, preferably a range value with the above arbitrary values ​​as the upper or lower limit.

[0040] In the present invention, the third screened material is subjected to high-pressure water spray cleaning to obtain upgraded particle steel blocks and vanadium slag. During the high-pressure water spray cleaning, the jet pressure is preferably 20 to 80 MPa, more preferably 30 to 70 MPa, such as 20 MPa, 30 MPa, 40 MPa, 50 MPa, 60 MPa, 70 MPa, and 80 MPa, preferably within a range with any of the above values ​​as the upper or lower limit.

[0041] The wet upgraded steel powder, upgraded steel pellets and upgraded steel blocks are dried until the moisture content is less than 0.05 wt %.

[0042] In the present invention, the drying temperature is preferably 100-700°C, more preferably 200-500°C, and most preferably 300-400°C. The present invention preferably utilizes the waste heat of vanadium-ferrocorundum slag or alloy cake to dry the upgraded particle steel powder, upgraded particle steel grains and upgraded particle steel blocks to obtain dried upgraded particle steel powder, upgraded particle steel grains and upgraded particle steel blocks. The present invention then mixes them with vanadium-ferrometallurgical raw materials in different grades and performs subsequent smelting to obtain vanadium-titanium alloy.

[0043] In the present invention, the ferrovanadium alloy is preferably a FeV50 or FeV80 grade ferrovanadium alloy product. The raw materials and proportions of the FeV50 or FeV80 grade ferrovanadium alloy product are well known to those skilled in the art and will not be described in detail herein. The smelting process can also adopt a commonly used smelting process in the art and will not be described in detail herein.

[0044] The present invention expands the refining process window for adjusting the amount of silicon component in the refining agent during the slag depletion period by screening and processing the particle steel. In the smelting process of the present invention, the amount of silicon component added to the refining agent is preferably 20 to 100 kg / t, such as 20 kg / t, 30 kg / t, 40 kg / t, 50 kg / t, 60 kg / t, 70 kg / t, 80 kg / t, 90 kg / t, and 100 kg / t, preferably a range value with any of the above values ​​as the upper or lower limit.

[0045] In the present invention, the aluminum consumption per ton of vanadium-iron during the smelting process is 290-570 kg, more preferably 300-550 kg. The mass content of Si impurities in the ferrovanadium alloy is 0.3%-1.5%, more preferably 0.3%-1.2%, and the mass content of Ti impurities is 0.01%-0.15%, more preferably 0.01%-0.1%.

[0046] This invention, based on the concept of source control and taking into account the actual side reactions of aluminothermic reduction, focuses on reducing impurities such as Ti and Si in the raw materials. By utilizing the inherent waste heat and easy separation characteristics of roughing steel particles, physical beneficiation technology is used to separate and reduce impurities in the steel particles. Considering the significant difference in particle size and density between non-calcium-containing minerals in vanadium slag and steel particles, physical separation can be used to fully reduce the amount of impurity oxides in the steel particles, and the waste heat of the slag is used to dry the clean steel particles. This impurity removal operation is simple and low-cost, expanding the operating window for the application of alloying and depletion technology during the refining period and possessing high practical value.

[0047] To further illustrate the present invention, a method for reducing impurities and aluminum consumption in vanadium-ferroalloy smelting provided by the present invention is described in detail below with reference to examples, but it should not be understood as limiting the scope of protection of the present invention.

[0048] Example 1

[0049] (1) Physically sorting the coarse particle steel containing minerals such as ironbrook tantalum, spinel and silicate at 100°C. Screening to obtain the first screening material, the second screening material and the third screening material. The particle size of the first screening material is less than or equal to 2.5mm, the particle size of the second screening material is greater than 2.5mm and less than or equal to 25mm, and the particle size of the third screening material is greater than 25mm. The particle size of the steel particles before screening is less than 45mm; the first screening material is sorted on a shaking table, the bed inclination is controlled at 3°, and the horizontal flushing water volume is 2L / min to obtain quality-improved particle steel powder and vanadium slag; the second screening material is sorted on a jig, the maximum eccentric stroke of the jig is 10mm, and the flushing frequency is 300 times / min to obtain quality-improved particle steel particles and vanadium slag; the third screening material is sprayed with high-pressure water, and the jet pressure is 20MPa to obtain quality-improved particle steel blocks and vanadium slag;

[0050] (2) drying the wet upgraded steel powder, upgraded steel pellets, and upgraded steel blocks using waste heat from vanadium-ferrocorundum slag or alloy cakes until the moisture content is less than 0.05%;

[0051] (3) The dried upgraded particle steel (powder, granules, blocks) is mixed with the raw materials required for ferrovanadium smelting according to the ratio for producing FeV80 grade products, and ferrovanadium smelting is carried out. According to the element balance calculation, the silicon component in the refining agent can be added at 100 kg / t.

[0052] Example 2

[0053] (1) Physically sorting the 300°C steel particles containing minerals such as ironbrook tantalum, spinel and silicate. Screening to obtain the first screening material, the second screening material and the third screening material, the particle size of the first screening material is less than or equal to 2.5mm, the particle size of the second screening material is greater than 2.5mm and less than or equal to 25mm, the particle size of the third screening material is greater than 25mm, and the particle size of the steel particles before entering the screening is less than 45mm; the first screening material is sorted on a shaking table, the bed inclination is controlled at 5°, and the horizontal flushing water volume is 6L / min, to obtain quality-improved particle steel powder and vanadium slag; the second screening material is sorted on a jig, the maximum eccentric stroke of the jig is 30mm, and the flushing frequency is 500 times / min, to obtain quality-improved particle steel particles and vanadium slag; the third screening material is cleaned by high-pressure water spraying, with a jet pressure of 80MPa, to obtain quality-improved particle steel blocks and vanadium slag;

[0054] (2) drying the wet upgraded steel powder, upgraded steel pellets, and upgraded steel blocks using waste heat from vanadium-ferrocorundum slag or alloy cakes until the moisture content is less than 0.05%;

[0055] (3) The dried upgraded particle steel (powder, granules, blocks) is mixed with the raw materials required for ferrovanadium smelting according to the ratio for producing FeV80 grade products, and ferrovanadium smelting is carried out. According to the element balance calculation, the silicon component in the refining agent can be added at 80 kg / t.

[0056] Example 3

[0057] (1) Physically sorting the 200°C steel particles containing minerals such as ironbrook tantalum, spinel and silicate. Screening to obtain the first screening material, the second screening material and the third screening material, the particle size of the first screening material is less than or equal to 2.5mm, the particle size of the second screening material is greater than 2.5mm and less than or equal to 25mm, the particle size of the third screening material is greater than 25mm, and the particle size of the steel particles before entering the screening is less than 45mm; the first screening material is sorted on a shaking table, the bed inclination is controlled at 4°, and the horizontal flushing water volume is 4L / min, to obtain quality-improved particle steel powder and vanadium slag; the second screening material is sorted on a jig, the maximum eccentric stroke of the jig is 20mm, and the flushing frequency is 400 times / min, to obtain quality-improved particle steel particles and vanadium slag; the third screening material is sprayed with high-pressure water, and the jet pressure is 50MPa to obtain quality-improved particle steel blocks and vanadium slag;

[0058] (2) drying the wet upgraded steel powder, upgraded steel pellets, and upgraded steel blocks using waste heat from vanadium-ferrocorundum slag or alloy cakes until the moisture content is less than 0.05%;

[0059] (3) The dried upgraded particle steel (powder, granules, blocks) is mixed with the raw materials required for ferrovanadium smelting according to the ratio for producing FeV80 grade products, and then smelted. According to the element balance calculation, the silicon component in the refining agent can be added at 60 kg / t.

[0060] Example 4

[0061] (1) Physically sorting the 100°C steel particles containing minerals such as ironbrook tantalum, spinel and silicate. Screening to obtain the first screening material, the second screening material and the third screening material, the particle size of the first screening material is less than or equal to 2.5mm, the particle size of the second screening material is greater than 2.5mm and less than or equal to 25mm, the particle size of the third screening material is greater than 25mm, and the particle size of the steel particles before entering the screening is less than 45mm; the first screening material is sorted on a shaking table, the bed inclination angle is controlled to 3°, the horizontal flushing water volume is 2L / min, and the quality-improved particle steel powder and vanadium slag are obtained; the second screening material is sorted on a jig, the maximum eccentric stroke of the jig is 30mm, the flushing frequency is 500 times / min, and the quality-improved particle steel particles and vanadium slag are obtained; the third screening material is sprayed with high-pressure water, the jet pressure is 20MPa, and the quality-improved particle steel blocks and vanadium slag are obtained;

[0062] (2) drying the wet upgraded steel powder, upgraded steel pellets, and upgraded steel blocks using waste heat from vanadium-ferrocorundum slag or alloy cakes until the moisture content is less than 0.05%;

[0063] (3) The dried upgraded particle steel (powder, granules, blocks) is mixed with the raw materials required for ferrovanadium smelting according to the ratio for producing FeV50 grade products, and ferrovanadium smelting is carried out. According to the element balance calculation, the silicon component in the refining agent can be added at 60 kg / t.

[0064] Comparative Example 1

[0065] Untreated steel particles (from the same batch as in Example 1) were mixed with the raw materials required for ferrovanadium smelting according to the ratio for producing FeV80 grade products, and ferrovanadium smelting was carried out. According to element balance calculation, only 10 kg / t of silicon component could be added to the refining agent.

[0066] Comparative Example 2

[0067] Untreated steel particles (from the same batch as in Example 2) were mixed with the raw materials required for ferrovanadium smelting according to the ratio for producing FeV80 grade products, and ferrovanadium smelting was carried out. According to element balance calculations, only 15 kg / t of silicon component could be added to the refining agent.

[0068] Comparative Example 3

[0069] Untreated steel particles (from the same batch as in Example 3) were mixed with the raw materials required for ferrovanadium smelting according to the ratio for producing FeV80 grade products, and ferrovanadium smelting was carried out. According to element balance calculations, only 5 kg / t of silicon component could be added to the refining agent.

[0070] Comparative Example 4

[0071] Untreated steel particles (from the same batch as in Example 4) were mixed with the raw materials required for ferrovanadium smelting according to the ratio for producing FeV50 grade products, and ferrovanadium smelting was carried out. According to the element balance calculation, 15 kg / t of silicon component was added to the refining agent.

[0072] Comparative Example 5

[0073] The particle steel from the same batch as Example 4 was conventionally washed with water and then magnetically separated. The obtained dry particle steel was mixed with the raw materials required for ferrovanadium smelting according to the ratio for producing FeV50 grade products, and ferrovanadium smelting was carried out. According to the element balance calculation, 25 kg / t of silicon component was added to the refining agent.

[0074] The method of reducing aluminum consumption per ton of vanadium iron smelting according to the present invention ensures significant improvements in product quality, aluminum consumption and vanadium yield, and can effectively remove the vanadium slag carried therein. The effects are shown in Table 1.

[0075] Table 1 Test results

[0076]

[0077]

[0078] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A method for reducing impurities and aluminum consumption in ferrovanadium smelting, comprising the following steps: A) pouring the coarsely screened steel particles into water for physical separation to obtain a first screening material, a second screening material, and a third screening material; The particle size of the first screened material is ≤2.5 mm, the particle size of the second screened material is >2.5 mm and ≤25 mm, and the particle size of the third screened material is >25 mm; B) subjecting the first screened material to shaking table sorting at a bed inclination of 3° to 5° and a horizontal flushing water flow of 2 to 6 L / min to obtain upgraded particle steel powder and vanadium slag; The second screened material is subjected to jig separation, with the jig having a maximum eccentric stroke of 10 to 30 mm and a stroke frequency of 300 to 500 times / min, to obtain quality-improved steel particles and vanadium slag; The third screened material is cleaned by high-pressure water spraying at a jet pressure of 20 to 80 MPa to obtain upgraded particle steel blocks and vanadium slag; C) drying the upgraded steel powder, upgraded steel pellets and upgraded steel blocks, and mixing them with ferrovanadium smelting raw materials according to a proportion, and smelting them to obtain ferrovanadium alloy.

2. The method for reducing impurities and aluminum consumption in ferrovanadium smelting according to claim 1, characterized in that: The temperature of the coarsely screened steel particles is 100-300°C.

3. The method for reducing impurities and aluminum consumption in ferrovanadium smelting according to claim 1, characterized in that: The particle size of the coarsely screened steel particles is less than 45 mm.

4. The method for reducing impurities and aluminum consumption in ferrovanadium smelting according to claim 1, characterized in that: The drying temperature of the upgraded particle steel powder, upgraded particle steel grains and upgraded particle steel blocks in step C) is 100-700°C.

5. The method for reducing impurities and aluminum consumption in ferrovanadium smelting according to claim 1, characterized in that: The upgraded particle steel powder, upgraded particle steel grains and upgraded particle steel blocks are dried by utilizing the waste heat of the vanadium-ferrocorundum slag or alloy cake.

6. The method for reducing impurities and aluminum consumption in ferrovanadium smelting according to claim 1, characterized in that: The moisture content of the dried upgraded particle steel powder, upgraded particle steel pellets and upgraded particle steel blocks is less than 0.05 wt %.

7. The method for reducing impurities and aluminum consumption in ferrovanadium smelting according to claim 1, characterized in that: During the smelting process, the amount of silicon component added to the refining agent is 20-100 kg / t.

8. The method for reducing impurities and aluminum consumption in ferrovanadium smelting according to claim 1, characterized in that: During the smelting process, the aluminum consumption per ton of vanadium iron is 290 to 570 kg.

9. The method for reducing impurities and aluminum consumption in ferrovanadium smelting according to claim 1, characterized in that: The impurities in the vanadium-iron alloy are Si impurities and Ti impurities.

10. The method for reducing impurities and aluminum consumption in ferrovanadium smelting according to claim 1, characterized in that: In the vanadium-iron alloy, the Si content is 0.3% to 1.5%, and the Ti content is 0.01% to 0.15%.

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