Smelting method of high-vanadium molten iron

Abstract

The invention provides a smelting method of high-vanadium molten iron, and belongs to the technical field of metallurgy. The smelting method comprises the following steps: on the basis of blowing and smelting the high-vanadium molten iron in a blast furnace, spraying uniformly mixed powder of pulverized coal and a diluent into the blast furnace, and meanwhile, realizing stable and smooth operation of smelting the high-vanadium molten iron in the blast furnace by combining with the adjustment of an air supply system; the diluent comprises the following components in percentage by weight: 78%-92% of MnO2, 6%-12% of SiO2, 0.20%-0.50% of S, 30%-1.0% of Al2O3, 0.5%-3.0% of CaO and MgO, 0.1%-1.0% of K2O and Na2O, and the balance of impurities; the adjustment of the air supply system comprises the adjustment of air supply temperature, air blast kinetic energy and air blast humidity. On the basis that the operation mode of the blast furnace is not changed, the fluidity of the molten iron is enhanced by spraying the mixed powder of the pulverized coal and the diluent and adjusting the air supply system, accumulation in the furnace is reduced, and stable smelting of the high-vanadium molten iron is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of metallurgy, and in particular to a method for smelting high-vanadium molten iron. Background Art

[0002] High-vanadium hot metal mainly comes from the smelting of high-vanadium titanium magnetite. With the increasing demand for high-performance alloys and special steels in the iron-making industry, the demand for high-vanadium hot metal has also increased year by year. Due to the presence of vanadium, high-vanadium hot metal has good corrosion resistance and wear resistance during the smelting process, and is widely used in the manufacture of special steels and alloys. However, the increase in vanadium content significantly changes the flow characteristics of molten iron, resulting in an increase in its viscosity. High-viscosity molten iron is prone to accumulate in the hearth area during blast furnace smelting, resulting in poor fluidity, which causes accumulation and agglomeration in the furnace, affecting the stability of the furnace condition, increasing the energy consumption of the blast furnace, and reducing production efficiency, ultimately affecting product quality and cost control. Therefore, achieving stable and efficient smelting of high-vanadium hot metal has become one of the key difficulties in blast furnace smelting technology.

[0003] At present, existing technologies have explored the smelting methods of high-vanadium hot metal. For example, patent CN109943714B proposes a smelting process for vanadium-titanium magnetite, in which powdered vanadium-titanium magnetite is mixed with blue charcoal powder and a binder to form granules, and blue charcoal powder and oxygen-enriched air are sprayed into the smelting after pre-reduction. This method has achieved results in promoting the separation of slag and iron, but the operation is complicated and the cost is high in the smelting of high-vanadium hot metal. Another patent CN116200557B discloses a blast furnace smelting method for double-zero silicon high-vanadium hot metal, which uses low-silicon high-basicity vanadium-titanium sintered ore, low-silicon acidic oxidizing vanadium-titanium pellets and coke with high ash and sulfur content to smelt double-zero silicon high-vanadium hot metal that meets the requirements of steelmaking process. Although this method improves the cost-effectiveness of vanadium-titanium magnetite, it involves multiple parameters and control indicators, and the overall adaptability is poor, which limits the scope of application of this process. In summary, existing smelting technologies generally face the problems of complex operation, high energy consumption and insufficient adaptability, which to a certain extent limit the development of high-vanadium hot metal smelting and the smooth operation of its subsequent production processes. The above methods also fail to solve the problem of high-vanadium hot metal smelting due to the high viscosity of molten iron, which is easy to accumulate in the hearth area during blast furnace smelting, resulting in poor fluidity, thus causing accumulation and agglomeration in the furnace. Summary of the invention

[0004] In order to solve the problems of increased viscosity, poor fluidity, hearth accumulation and increased energy consumption during the smelting of high-vanadium hot metal, the present invention aims to provide a smelting method of high-vanadium hot metal. The present invention realizes stable smelting of high-vanadium hot metal by spraying a mixed powder of coal powder and a diluent, and combines the adjustment of the air supply system, thereby meeting the requirements for the smooth flow of high-vanadium hot metal.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] One of the technical solutions of the present invention is a method for smelting high-vanadium hot metal. On the basis of smelting high-vanadium hot metal by blast furnace injection, a mixed powder of coal powder and diluent is sprayed into the blast furnace, and at the same time, the air supply system is adjusted to achieve stable and smooth smelting of high-vanadium hot metal in the blast furnace.

[0007] The diluent includes the following components in percentage by mass: MnO2 78% to 92%, SiO2 6% to 12%, S 0.20% to 0.50%, Al2O 30% to 1.0%, CaO and MgO 0.5% to 3.0%, K2O and Na2O 0.1% to 1.0%, and the remainder of impurities;

[0008] The adjustment of the air supply system includes the adjustment of the air supply temperature, the blast kinetic energy and the blast humidity.

[0009] The second technical solution of the present invention is a method for reducing the viscosity during the smelting of high-vanadium molten iron, which adopts the smelting method of high-vanadium molten iron mentioned above.

[0010] The present invention discloses the following technical effects:

[0011] The present invention sprays a mixed powder of coal powder and a diluent and adjusts the air supply system (air supply temperature, blast pressure, blast humidity) to enhance the fluidity of molten iron, reduce accumulation in the furnace, and achieve stable smelting of high-vanadium molten iron.

[0012] The method provided by the present invention can improve the stability of furnace conditions without changing the blast furnace operation mode, has low energy consumption and good economic benefits, and is suitable for wide industrial applications.

[0013] The invention simplifies the process operation, improves the smelting smoothness of high-vanadium molten iron, and has higher economic benefits and industrial application prospects. DETAILED DESCRIPTION

[0014] Various exemplary embodiments of the present invention will now be described in detail. This detailed description should not be considered as limiting the present invention, but should be understood as a more detailed description of certain aspects, features, and embodiments of the present invention.

[0015] It should be understood that the terms described in the present invention are only for describing a particular embodiment and are not intended to limit the present invention. In addition, for the numerical range in the present invention, it should be understood that each intermediate value between the upper and lower limits of the scope is also specifically disclosed. The intermediate value in any stated value or stated range, and each smaller range between any other stated value or intermediate value in the described range is also included in the present invention. The upper and lower limits of these smaller ranges can be independently included or excluded in the scope.

[0016] Unless otherwise indicated, all technical and scientific terms used herein have the same meanings as those generally understood by those skilled in the art. Although the present invention describes only preferred methods and materials, any methods and materials similar or equivalent to those described herein may also be used in the implementation or testing of the present invention. All documents mentioned in this specification are incorporated by reference to disclose and describe the methods and / or materials associated with the documents. In the event of a conflict with any incorporated document, the content of this specification shall prevail.

[0017] It will be apparent to those skilled in the art that various modifications and variations may be made to the specific embodiments of the present invention description without departing from the scope or spirit of the present invention. Other embodiments derived from the present invention description will be apparent to the skilled artisan. The present invention description and examples are exemplary only.

[0018] The words “include,” “including,” “have,” “contain,” etc. used in this document are open-ended terms, meaning including but not limited to.

[0019] In order to more efficiently smelt high-vanadium hot metal, the present invention realizes effective regulation of high-viscosity hot metal in the furnace, based on blast furnace injection regulation, by injecting a mixed powder of coal powder and diluent and combining with the optimization regulation of the air supply system, to achieve stable smelting of high-vanadium hot metal. The method should not only meet the requirements of stable and smooth flow of hot metal and high adaptability, but also have low energy consumption and good economic benefits.

[0020] The first aspect of the present invention provides a method for smelting high-vanadium hot metal. On the basis of smelting high-vanadium hot metal by blast furnace injection, a mixed powder of coal powder and diluent is sprayed into the blast furnace, and at the same time, the air supply system is adjusted to achieve stable and smooth smelting of high-vanadium hot metal in the blast furnace.

[0021] The diluent includes the following components in percentage by mass: MnO2 78% to 92%, SiO2 6% to 12%, S 0.20% to 0.50%, Al2O 30% to 1.0%, CaO and MgO 0.5% to 3.0%, K2O and Na2O 0.1% to 1.0%, and the remainder of impurities;

[0022] The adjustment of the air supply system includes the adjustment of the air supply temperature, the blast kinetic energy and the blast humidity.

[0023] The diluent in the present invention is prepared by crushing and grinding pyrolusite to a particle size of 75% to 90% less than 0.074 mm and 50% to 80% less than 0.045 mm. The present invention selects pyrolusite with MnO2, SiO2 and S in the above content range as the diluent to improve the smelting efficiency. If MnO2, SiO2 and S are not within the above range, the following effects will occur:

[0024] SiO2 can stabilize the slag, ensuring that the reduction process of MnO2 is not negatively affected by changes in slag fluidity or viscosity, promoting the separation of slag and molten iron, and improving smelting efficiency. During the smelting process, S reacts with alkali metal oxides to form sulfides, which helps to remove excess sulfur in the molten iron and prevents excessive sulfur from remaining in the molten iron and affecting the quality of steel. SiO2 ensures the operational stability of the blast furnace by adjusting the physical properties of the slag, while S ensures the quality of the molten iron by adjusting the composition of the molten iron and assisting in desulfurization. If the content of each component in the diluent is not within the above range, for example, if the S content is too high, it will lead to excessive S in the blast furnace, damage the blast furnace equipment and increase the harmful elements in the flue gas. If it is too low, smooth desulfurization cannot be guaranteed.

[0025] In some embodiments of the present invention, the amount of the coal powder added is 2% to 5% of the total furnace material mass. The total furnace material in the present invention is the furnace material for blast furnace injection smelting high vanadium hot metal well known to those skilled in the art + the coal powder and diluent added in the present invention, that is, the total furnace material is vanadium titanium ore, coke, sintered ore, dolomite, coal powder, diluent and auxiliary agent (such as fluorite, magnesia material).

[0026] In some embodiments of the present invention, the amount of the diluent added is 2-4 times the vanadium content of the molten iron.

[0027] In the present invention, if too much diluent is added, the dilution effect is too strong, which affects the separation of slag and iron, resulting in excessive dilution of the vanadium concentration in the molten iron, affecting the control of the target vanadium content, thereby reducing the performance of the molten iron; it will also make the furnace condition unstable, resulting in uneven temperature distribution in the blast furnace, increased accumulation in the furnace area, and causing agglomeration problems.

[0028] If the coal powder is too low, insufficient CO gas is generated in the furnace, resulting in a decrease in the efficiency of the reduction reaction, which will increase the content of unreduced impurities in the molten iron. In addition, insufficient reduction will also lead to (1) more high-viscosity slag in the blast furnace, which will reduce the fluidity of the molten iron and cause accumulation or agglomeration problems in the furnace; (2) incomplete combustion in certain areas of the blast furnace, which will affect the uniform distribution of heat in the furnace and reduce the stability of the furnace condition.

[0029] If there is too much pulverized coal, oxygen consumption will increase, combustion efficiency will decrease, and heat in the furnace will be insufficient, making it difficult to maintain the temperature of molten iron within the range required for smelting. Excessive pulverized coal injection will also generate excessive CO gas, which will lead to an imbalance in the gas flow distribution in the blast furnace, reduce air permeability, and affect the smoothness of the furnace. In addition, due to the incomplete combustion of pulverized coal in the blast furnace, the utilization rate of pulverized coal will decrease, increasing the waste of raw materials and production costs.

[0030] In some embodiments of the present invention, the particle size of the diluent is less than 0.015 mm, accounting for 80 wt%-100 wt%.

[0031] In the present invention, if the particle size of the diluent is too large, the following effects will occur:

[0032] 1. Reduced distribution and mixing uniformity of diluent

[0033] The diluent with larger particle size is unevenly distributed during the coal powder mixing process, which will lead to unstable injection effect.

[0034] 2. Reduced reaction efficiency

[0035] Too large a particle size will reduce the specific surface area of ​​the diluent, and the reaction activity will decrease accordingly, and the contact and reaction rate between the diluent and the molten iron will slow down.

[0036] The reduction in reaction efficiency will affect the diluent's ability to improve the slag-iron interface performance, resulting in poor slag-iron separation effect.

[0037] 3. The effect of regulating the viscosity of molten iron decreases

[0038] Because the particle size is too large, the melting speed of the diluent is slowed down, which will result in the viscosity of the molten iron being unable to be effectively reduced in a short period of time, and the problem of poor fluidity will become more significant.

[0039] 4. The stability of the injection operation is affected

[0040] Diluents with larger particle sizes are prone to sedimentation or clogging in the spray pipe, increasing the maintenance cost of the spray system.

[0041] Diluent particles that are too large will rebound or burn incompletely during the injection process, reducing the injection efficiency.

[0042] In some embodiments of the present invention, the mass fraction of the coal powder with a particle size of less than 80 meshes does not exceed 3%, and the mass fraction of the coal powder with a particle size of more than 200 meshes does not exceed 80%.

[0043] In some embodiments of the present invention, the air supply temperature is 1200°C to 1300°C.

[0044] In some embodiments of the present invention, the blast kinetic energy is increased by 300 to 1000 kg / m·s relative to the basic parameter of the blast kinetic energy. The basic parameters of the blast kinetic energy of different blast furnace sizes are different. In the present invention, relative to the basic parameter of the blast kinetic energy of 14000 kg / m·s, the blast kinetic energy of the present invention is 14300 to 15000 kg / m·s (i.e., relative to the basic parameter of the blast kinetic energy, it is increased by 300 to 1000 kg / m·s).

[0045] In some embodiments of the present invention, the blast humidity is 2.20% to 3.4%.

[0046] Conventional air supply temperature is usually 1050℃~1250℃, conventional blast kinetic energy is generally 14000~15500kg / m·s, and conventional blast humidity is usually 1.0%~2.0%. The present invention is adjusted on the basis of the conventional air supply system, and combines the spraying of coal powder and diluent mixed powder into the blast furnace to achieve stable and smooth smelting of high-vanadium molten iron in the blast furnace. If (1) the air supply temperature is too low: insufficient heat supply in the furnace leads to lower molten iron temperature, poor fluidity, aggravated accumulation problem in the furnace area, incomplete combustion of coal powder, increased residual carbon, affecting gas fluidity and air permeability of the blast furnace; temperature is too high: too high air supply temperature increases fuel consumption and reduces the economy of blast furnace operation. Too high temperature will cause the reaction in the furnace to be too fast, resulting in insufficient separation of slag and iron, affecting the quality of molten iron. (2) The kinetic energy of the blast is too low: the blast velocity is reduced, the gas is unevenly distributed in the blast furnace, the air permeability is poor, resulting in local high temperature or insufficient cooling; the amount of CO gas generated is insufficient, resulting in reduced reduction reaction efficiency and increased impurity content in the molten iron; the kinetic energy of the blast is too high: excessive blast kinetic energy will cause disordered gas distribution in the blast furnace, causing gas short circuit in the furnace area; excessive gas kinetic energy will destroy the material column structure and affect the smooth operation of the furnace. (3) The blast humidity is too low: too low humidity will reduce the heat transfer capacity of the gas, resulting in insufficient slag and iron separation, affecting the quality of the molten iron; humidity is too high: too high humidity will increase the water vapor content in the furnace, intensify the endothermic reaction, and cause insufficient heat. The molten iron temperature is insufficient, the viscosity increases, and the fluidity deteriorates, affecting the slag and iron separation.

[0047] In some embodiments of the present invention, when the mixed powder of pulverized coal and diluent is sprayed into the blast furnace, the horizontal angle of the coal injection gun is 7.5° to 8.5°.

[0048] In the present invention, the impact of too small horizontal angle of the coal injection gun is: (1) Too small horizontal angle will shorten the injection distance of the injected coal powder and diluent, making it difficult to reach the deep area inside the blast furnace. (2) The injected material will be deposited near the furnace wall too early, affecting the injection effect and increasing the risk of blockage. (3) The coal powder and diluent cannot be evenly distributed in the blast furnace, resulting in insufficient local combustion, unburned carbon residue, and reduced combustion efficiency. Incompletely burned coal powder will accumulate in the furnace, affecting the fluidity of molten iron and the separation of slag and iron.

[0049] Impact of too large horizontal angle: (1) Too large horizontal angle will cause the injected material to be overly dispersed and unable to be concentrated in the center of the blast furnace. (2) Too large an injection angle of coal will interfere with the normal flow distribution of gas in the blast furnace, causing unstable airflow and even affecting the air permeability of the blast furnace. (3) The impact of airflow will cause particle deposition or local overcooling, reducing the efficiency of the blast furnace.

[0050] In some embodiments of the present invention, the vanadium content of the high-vanadium molten iron is 0.40wt% to 0.60wt%.

[0051] A second aspect of the present invention provides a method for reducing viscosity during the smelting of high-vanadium molten iron, using the above-mentioned smelting method of high-vanadium molten iron.

[0052] The technical solutions described in the present invention, unless otherwise specified, are all conventional solutions in the art, and the reagents or raw materials used, unless otherwise specified, are purchased from commercial channels or have been disclosed.

[0053] In order to better understand the present invention, the content of the present invention is further explained below in conjunction with the embodiments, but the content of the present invention is not limited to the following embodiments.

[0054] In the embodiment, the diluent is prepared by crushing and grinding pyrolusite to a particle size of 75% to 90% less than 0.074 mm and a particle size of 50% to 80% less than 0.045 mm.

[0055] In the embodiment, the total materials fed into the furnace are vanadium-titanium ore, coke, sintered ore, dolomite, coal powder, diluent and auxiliary agent fluorite.

[0056] In the embodiment, the basic parameter of the blast kinetic energy is 14000 kg / m·s.

[0057] Example 1

[0058] The present invention provides a method for smelting high-vanadium molten iron, comprising the following steps:

[0059] In the process of blast furnace smelting high-vanadium molten iron, a uniform powder mixed with coal powder and a diluent is sprayed through a coal injection gun, wherein the diluent includes the following components in percentage by mass: MnO2 80.43%, SiO2 7.89%, S 0.24%, Al2O3 0.34%, CaO+MgO 2.23%, K2O+Na2O 0.40%, and the rest are impurities. The portion with a particle size less than 0.015 mm accounts for 96.16%, the amount of diluent added is twice the vanadium content of the molten iron, the amount of coal powder added is 2.5% of the total mass of the material entering the furnace, the mass fraction of coal powder with a particle size of less than 80 mesh accounts for 1.25%, and the mass fraction of coal powder with a particle size greater than 200 mesh accounts for 90.30%. In order to meet the needs of high-vanadium hot metal smelting, the injection system of the blast furnace was adjusted, the air supply temperature was set to 1260°C, the blast kinetic energy was 14950kg / m·s, the blast humidity was controlled at 2.85%, and the horizontal angle of the coal injection gun was set to 7.5°. Under these conditions, the vanadium content of the high-vanadium hot metal in this embodiment reached 0.43%.

[0060] Through the optimization of the above process parameters, the viscosity of high vanadium molten iron at 1450℃ is 5.29mPa·s.

[0061] Example 2

[0062] The present invention provides a method for smelting high-vanadium molten iron, comprising the following steps:

[0063] In the process of blast furnace smelting high-vanadium molten iron, a uniform powder mixed with coal powder and a diluent is sprayed through a coal injection gun, wherein the diluent includes the following components in percentage by mass: MnO2 84.23%, SiO2 8.29%, S 0.22%, Al2O3 0.44%, CaO+MgO 2.51%, K2O+Na2O 0.38%, and the rest are impurities. The portion with a particle size less than 0.015 mm accounts for 93.11%, the amount of diluent added is twice the vanadium content of the molten iron, the amount of coal powder added is 2.5% of the total mass of the material entering the furnace, the mass fraction of coal powder with a particle size of less than 80 mesh accounts for 2.00%, and the mass fraction of coal powder with a particle size greater than 200 mesh accounts for 92.53%. In order to meet the needs of high-vanadium hot metal smelting, the injection system of the blast furnace was adjusted, the air supply temperature was set to 1250°C, the blast kinetic energy was 14750kg / m·s, the blast humidity was controlled at 2.80%, and the horizontal angle of the coal injection gun was set to 8.0°. Under these conditions, the vanadium content of the high-vanadium hot metal in this embodiment reached 0.46%.

[0064] Through the optimization of the above process parameters, the viscosity of high vanadium molten iron at 1450℃ is 5.64mPa·s.

[0065] Example 3

[0066] The present invention provides a method for smelting high-vanadium molten iron, comprising the following steps:

[0067] In the process of blast furnace smelting high-vanadium molten iron, a uniform powder mixed with coal powder and a diluent is sprayed through a coal injection gun, wherein the diluent includes the following components in percentage by mass: MnO2 89.44%, SiO2 6.45%, S 0.22%, Al2O3 0.17%, CaO+MgO 2.93%, K2O+Na2O 0.44%, and the rest are impurities. The part with a particle size less than 0.015 mm accounts for 94.41%, the amount of diluent added is 3 times the vanadium content of the molten iron, the amount of coal powder added is 4.0% of the total mass of the material entering the furnace, the mass fraction of coal powder with a particle size of less than 80 mesh accounts for 2.00%, and the mass fraction of coal powder with a particle size greater than 200 mesh accounts for 90.11%. In order to meet the needs of high-vanadium hot metal smelting, the injection system of the blast furnace was adjusted, the air supply temperature was set to 1280°C, the blast kinetic energy was 14970kg / m·s, the blast humidity was controlled at 3.10%, and the horizontal angle of the oxygen-coal gun was set to 7.5°. Under these conditions, the vanadium content of the high-vanadium hot metal in this embodiment reached 0.41%.

[0068] Through the optimization of the above process parameters, the viscosity of high vanadium molten iron at 1450℃ is 4.98mPa·s.

[0069] Comparative Example 1

[0070] The only difference from Example 3 is that the addition of the diluent is omitted, and the remaining steps and parameters are the same as those of Example 3.

[0071] At 1450°C, the viscosity of the high-vanadium molten iron in this comparative example is 5.41 mPa·s.

[0072] Comparative Example 2

[0073] The only difference from Example 3 is that the diluent includes the following components in percentage by mass: MnO2 75.64%, SiO2 8.45%, S 0.45%, Al2O3 2.58%, CaO+MgO 4.88%, K2O+Na2O 0.43%, and the rest are impurities. The remaining steps and parameters are the same as those in Example 3.

[0074] At 1450°C, the viscosity of the high-vanadium molten iron in this comparative example is 5.101 mPa·s.

[0075] Comparative Example 3

[0076] The only difference from Example 3 is that the air supply temperature is 1250° C., the blast kinetic energy is 15100 kg / m·s, and the blast humidity is 2.85%. The remaining steps and parameters are the same as those in Example 3.

[0077] At 1450°C, the viscosity of the high-vanadium molten iron in this comparative example is 5.044 mPa·s.

[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 principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A method for smelting high-vanadium molten iron, characterized in that: On the basis of blast furnace injection smelting high vanadium hot metal, the mixed powder of coal powder and diluent is sprayed into the blast furnace, and the adjustment of the air supply system is combined to achieve the stable and smooth smelting of high vanadium hot metal in the blast furnace; The diluent includes the following components in percentage by mass: MnO2 78% to 92%, SiO2 6% to 12%, S 0.20% to 0.50%, Al2O 30% to 1.0%, CaO and MgO 0.5% to 3.0%, K2O and Na2O 0.1% to 1.0%, and the remainder of impurities; The adjustment of the air supply system includes the adjustment of the air supply temperature, the blast kinetic energy and the blast humidity.

2. The smelting method of high vanadium hot metal according to claim 1, characterized in that: The added amount of the coal powder is 2% to 5% of the total mass of the materials entering the furnace.

3. The smelting method of high vanadium hot metal according to claim 1, characterized in that: The amount of the diluent added is 2-4 times the vanadium content of the molten iron.

4. The smelting method of high vanadium hot metal according to claim 1, characterized in that: The particle size of the diluent is less than 0.015 mm, accounting for 80wt%-100wt%.

5. The smelting method of high vanadium hot metal according to claim 1, characterized in that: The air supply temperature is 1200°C to 1300°C.

6. The smelting method of high vanadium hot metal according to claim 1, characterized in that: The blast kinetic energy is increased by 300 to 1000 kg / m·s relative to the basic parameter of blast kinetic energy.

7. The smelting method of high vanadium hot metal according to claim 1, characterized in that: The blast humidity is 2.20% to 3.4%.

8. The smelting method of high vanadium hot metal according to claim 1, characterized in that: When spraying the mixed powder of coal powder and diluent into the blast furnace, the horizontal angle of the coal injection gun is 7.5°~8.5°.

9. The smelting method of high vanadium hot metal according to claim 1, characterized in that: The vanadium content in the high-vanadium iron water is 0.40wt% to 0.60wt%.

10. A method for reducing the viscosity of high-vanadium hot metal during smelting, characterized in that: A smelting method for high-vanadium molten iron according to any one of claims 1 to 9.