Ferro-molybdenum alloy product and preparation method thereof

Abstract

The invention discloses a ferro-molybdenum alloy product and a preparation method thereof, and belongs to the technical field of metallurgy, and the preparation method comprises the steps that molybdenum-containing waste residues and wastes are selected as preparation raw materials, and the minimum value of the molybdenum content in the molybdenum-containing waste residues and wastes is 4%; the preparation raw materials are placed in an electric arc furnace, then a reducing agent and an auxiliary are added for primary smelting, the smelting temperature is 2200-2700 DEG C, and ferromolybdenum alloy is obtained; and refining the ferro-molybdenum alloy by adopting a universal refining furnace to obtain a ferro-molybdenum alloy product. The technical effects that the ferro-molybdenum alloy product is obtained with the waste residues as the preparation raw materials, and the raw material source of the ferro-molybdenum alloy product is enriched are achieved.

Description

Technical Field

[0001] The present application relates to the field of metallurgical technology, and in particular to a molybdenum-iron alloy product and a preparation method thereof. Background Art

[0002] Ferro-molybdenum alloy products can be used as alloy additives for steelmaking, usually made by reducing molybdenite as raw material. Ferro-molybdenum alloy products are generally produced by the off-furnace method. Although the content of molybdenum in ore resources is rich, the source is single, and the labor cost of ore mining and the impact on the environment are extremely high. Summary of the invention

[0003] The main purpose of the present application is to provide a molybdenum-iron alloy product and a preparation method thereof, aiming to solve the technical problem of single raw material source and poor sustainable development in the preparation of molybdenum-iron alloy products.

[0004] To achieve the above object, the present application provides a method for preparing a molybdenum-iron alloy product, comprising:

[0005] Selecting molybdenum-containing waste slag as the preparation raw material, wherein the minimum molybdenum content in the molybdenum-containing waste slag is 4%;

[0006] Placing the prepared raw material in an electric arc furnace, adding a reducing agent and an auxiliary agent for preliminary smelting at a smelting temperature of 2200-2700° C., and obtaining a molybdenum-iron alloy;

[0007] The ferromolybdenum alloy is refined by a universal refining furnace to obtain a ferromolybdenum alloy product.

[0008] The present application uses molybdenum-containing waste slag as the raw material for preparing ferromolybdenum alloy products. The molybdenum content in the molybdenum-containing waste slag is much lower than that in molybdenite. By using the preparation method of the present application, a directly usable ferromolybdenum alloy product can be prepared from molybdenum-containing waste slag with a minimum molybdenum content of 4%. An electric arc furnace is used for preliminary smelting. At a temperature of 2200-2700°C, the state of the molybdenum-containing waste slag tends to be liquid, and can react with a reducing agent to reduce molybdenum oxide and iron oxide. At the same time, the auxiliary agent can prevent the local reaction from being too violent to obtain ferromolybdenum alloy. The ferromolybdenum alloy is further refined by a universal refining furnace to improve the purity of the ferromolybdenum alloy product and obtain a ferromolybdenum alloy product that can be directly used.

[0009] In some embodiments of the present application, the reducing agent includes at least one of carbon element, silicon element and active metal.

[0010] Carbon, silicon and active metals are all reducing. Carbon is converted into gaseous carbon oxides after redox reaction. Active metals are gaseous at smelting temperature and can form less residue in molybdenum-iron alloy. Silicon oxides produced by oxidation of silicon can also be removed during the refining process.

[0011] In some embodiments of the present application, the auxiliary agent includes at least one of a sodium source and a calcium source.

[0012] The sodium source and calcium source as additives can reduce the contact area between the reducing agent and the molten molybdenum-containing waste slag and waste materials, thereby preventing the local reaction from being too intense.

[0013] In some embodiments of the present application, the time for the preliminary smelting is 3-5 hours.

[0014] If the initial smelting time is too short, the reduction will not be sufficient, while if the smelting time is too long, the purity of the molybdenum-iron alloy product will not be improved much and energy consumption will increase.

[0015] In some embodiments of the present application, the refining time is 5-8 hours.

[0016] If the refining time is too short, it cannot effectively improve the purity; if the refining time is too long, the energy consumption will be too high.

[0017] In some embodiments of the present application, the refining temperature is 2500-3000°C.

[0018] If the refining temperature is too low, it will not be conducive to improving the purity of the molybdenum-iron alloy. If the refining temperature is too high, it will cause a large waste of energy.

[0019] In some embodiments of the present application, the content of molybdenum in the ferro-molybdenum alloy product is 50%-65%.

[0020] The molybdenum-iron alloy product prepared by the method of the embodiment of the present application has a molybdenum content that meets the content standards of common molybdenum-iron alloy product grades on the market and can be directly used as an alloy additive for steelmaking.

[0021] In some embodiments of the present application, the mass ratio between the molybdenum-containing waste slag and the reducing agent is 100:10-100:20.

[0022] If the amount of reducing agent added is too low, the reduction of molybdenum-containing waste slag and waste will not be sufficient. If the amount of reducing agent added is too high, more impurities may be formed and affect the purity of the molybdenum-iron alloy product.

[0023] In some embodiments of the present application, the mass ratio between the molybdenum-containing waste slag and the additive is 100:8-100:15.

[0024] If the amount of additive added is too low, it cannot effectively control the intensity of the reaction. If the amount of additive added is too high, the reaction rate will be excessively reduced and the reduction process will be slow.

[0025] In addition, to achieve the above-mentioned purpose, the present application also provides a ferro-molybdenum alloy product, which is prepared by the ferro-molybdenum alloy product preparation method as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present drawings or related technologies, the drawings required for use in the embodiments or related technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present drawings. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0027] Figure 1 This is a schematic flow chart of an embodiment of a method for preparing a molybdenum-iron alloy product of the present application.

[0028] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0029] It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0030] Hereinafter, the molybdenum-iron alloy product of the present application and the method for preparing the same are specifically disclosed in detail with appropriate reference to the accompanying drawings. However, there may be cases where unnecessary detailed descriptions are omitted. For example, there are cases where detailed descriptions of well-known matters and repeated descriptions of actually the same structures are omitted. This is to avoid the following description from becoming unnecessarily lengthy and to facilitate the understanding of those skilled in the art. In addition, the drawings and the following descriptions are provided for those skilled in the art to fully understand the present application and are not intended to limit the subject matter described in the claims.

[0031] "Scope" disclosed in the present application is limited in the form of lower limit and upper limit, and a given range is limited by selecting a lower limit and an upper limit, and the selected lower limit and upper limit define the boundary of a special range. The scope limited in this way can be including end values ​​or not including end values, and can be arbitrarily combined, that is, any lower limit can be combined with any upper limit to form a scope. For example, if the scope of 60-120 and 80-110 is listed for a specific parameter, it is understood that the scope of 60-110 and 80-120 is also expected. In addition, if the minimum range values ​​1 and 2 are listed, and if the maximum range values ​​3, 4 and 5 are listed, the following scope can be all expected: 1-3, 1-4, 1-5, 2-3, 2-4 and 2-5. In the present application, unless otherwise specified, the numerical range "ab" represents the abbreviation of any real number combination between a and b, wherein a and b are real numbers. For example, the numerical range "0-5" means that all real numbers between "0-5" are listed in this document, and "0-5" is just an abbreviation of these numerical combinations. In addition, when a parameter is expressed as an integer ≥ 2, it is equivalent to disclosing that the parameter is, for example, an integer of 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, etc.

[0032] Unless otherwise specified, all embodiments and optional embodiments of the present application can be combined with each other to form a new technical solution.

[0033] Unless otherwise specified, all technical features and optional technical features of this application can be combined with each other to form a new technical solution.

[0034] If there is no special explanation, all steps of the present application can be performed sequentially or randomly, preferably sequentially. For example, the method includes steps (a) and (b), which means that the method may include steps (a) and (b) performed sequentially, or may include steps (b) and (a) performed sequentially. For example, the method may further include step (c), which means that step (c) may be added to the method in any order. For example, the method may include steps (a), (b) and (c), or may include steps (a), (c) and (b), or may include steps (c), (a) and (b), etc.

[0035] If there is no special explanation, the "include" and "comprising" mentioned in this application are open-ended or closed-ended. For example, the "include" and "comprising" may mean that other components not listed may also be included or only the listed components may be included or only the listed components may be included.

[0036] If not specifically stated, in this application, the term "or" is inclusive. For example, the phrase "A or B" means "A, B, or both A and B". More specifically, any of the following conditions satisfies the condition "A or B": A is true (or exists) and B is false (or does not exist); A is false (or does not exist) and B is true (or exists); or both A and B are true (or exist).

[0037] The present invention provides a method for preparing a molybdenum-iron alloy product. Figure 1 In this embodiment, the preparation method of the ferromolybdenum alloy product includes:

[0038] Step S10, selecting molybdenum-containing waste slag and waste materials as preparation raw materials, wherein the minimum molybdenum content in the molybdenum-containing waste slag and waste materials is 4%;

[0039] Step S20, placing the prepared raw material in an electric arc furnace, adding a reducing agent and an auxiliary agent for preliminary smelting at a smelting temperature of 2200-2700° C., and obtaining a molybdenum-iron alloy;

[0040] Step S30, refining the ferromolybdenum alloy by a universal refining furnace to obtain a ferromolybdenum alloy product.

[0041] The embodiment of the present application uses molybdenum-containing waste slag as the raw material for preparing ferromolybdenum alloy products. The molybdenum content in the molybdenum-containing waste slag is much lower than that in molybdenite. By using the preparation method of the present application, a directly usable ferromolybdenum alloy product can be prepared from molybdenum-containing waste slag with a minimum molybdenum content of 4%. It is understandable that the molybdenum-containing waste slag can be the scraps produced during the ferromolybdenum smelting process.

[0042] The electric arc furnace is used for preliminary smelting. At a temperature of 2200-2700°C, the molybdenum-containing waste slag and waste tend to be in a liquid state and can react with a reducing agent to reduce molybdenum oxide and iron oxide. At the same time, the additive can prevent the local reaction from being too intense to obtain molybdenum-iron alloy. The electric arc furnace can be a DC electric arc furnace, and the smelting temperature can be 2200°C, 2300°C, 2400°C, 2500°C, 2550°C, 2600°C, 2700°C, etc.

[0043] After the preliminary smelting, the ferromolybdenum alloy is further refined by a universal refining furnace, which can improve the purity of the ferromolybdenum alloy product and obtain a ferromolybdenum alloy product that can be directly used. The universal refining furnace is a new type of energy-saving and environmentally friendly smelting equipment, which has a stable voltage and can save electricity. It can be understood that the ferromolybdenum alloy in this embodiment refers to the product of preliminary smelting, and the ferromolybdenum alloy product refers to the refined product. Refining can improve the purity of the ferromolybdenum alloy, so that the ferromolybdenum content in the ferromolybdenum alloy product is greater than that of the ferromolybdenum alloy.

[0044] In some feasible embodiments, the reducing agent includes at least one of carbon, silicon and active metal. Carbon, silicon and active metal are all reducible, and carbon is converted into gaseous carbon oxides after the reduction reaction occurs. Active metals are gaseous at smelting temperature, and less residue can be formed in molybdenum-iron alloys. The product after the oxidation of silicon can also be removed during the refining process. It is understood that the active metal may include at least one of sodium, sodium alloy, calcium and calcium alloy. Sodium, sodium alloy, calcium and calcium alloy have low boiling points and high activity, and can fully reduce molybdenum oxides and iron oxides.

[0045] In some feasible embodiments, the auxiliary agent includes at least one of a sodium source and a calcium source. The sodium source and calcium source as auxiliary agents can reduce the contact area between the reducing agent and the molten molybdenum-containing waste slag and waste material to prevent the local reaction from being too intense. Specifically, the sodium source can include at least one of sodium hydroxide and sodium carbonate. The calcium source can include at least one of calcium hydroxide, calcium oxide and calcium carbonate.

[0046] In some feasible implementations, the initial smelting time is 3-5 hours, for example, 3 hours, 3.5 hours, 4 hours, 4.5 hours, 5 hours, etc. If the initial smelting time is too short, the reduction is not sufficient, while if the smelting time is too long, the purity of the molybdenum-iron alloy product is not improved much, and energy consumption will be increased.

[0047] In some feasible implementations, the refining time is 5-8 hours, for example, 5 hours, 5.5 hours, 6 hours, 6.5 hours, 7 hours, 7.5 hours, 8 hours, etc. If the refining time is too short, it cannot effectively improve the purity, and if the refining time is too long, the energy consumption is too large. It is understandable that the refining time can be adjusted according to the initial smelting time, so that the refining time is longer than the initial smelting time, so as to improve the purity of the ferroniobium alloy product.

[0048] In some feasible embodiments, the refining temperature is 2500-3000°C, for example, 2500°C, 2600°C, 2700°C, 2800°C, 2900°C, 3000°C, etc. If the refining temperature is too low, it is not conducive to improving the purity of the molybdenum-iron alloy, and if the refining temperature is too high, a large amount of energy is wasted. It is understandable that the refining temperature tends to be set higher than the temperature of the initial smelting to achieve a better refining effect.

[0049] In some feasible implementations, the molybdenum content of the ferro-molybdenum alloy product is 50%-65%, for example, 50%, 55%, 60%, 65%, etc. It is understandable that the ferro-molybdenum alloy product prepared by the method of the embodiment of the present application, wherein the molybdenum content of the ferro-molybdenum alloy product meets the content standards of the common ferro-molybdenum alloy grades on the market, can be directly used as an alloy additive for steelmaking.

[0050] In some feasible embodiments, the mass ratio between the molybdenum-containing waste slag and the reducing agent is 100:10-100:20, for example, 100:10, 100:12, 100:15, 100:18, 100:20, etc. If the amount of reducing agent added is too low, the reduction of the molybdenum-containing waste slag is not sufficient, and if the amount of reducing agent added is too high, more impurities may be formed and the purity of the molybdenum-iron alloy product may be affected.

[0051] In some feasible embodiments, the mass ratio of the molybdenum-containing waste slag and the additive is 100:8-100:15, for example, 100:8, 100:10, 100:11, 100:13, 100:15, etc. If the amount of additive added is too low, it cannot effectively control the severity of the reaction. If the amount of additive added is too high, the reaction rate is excessively reduced and the reduction process is slow.

[0052] The embodiment of the present application also provides a ferro-molybdenum alloy product, which is prepared by the preparation method of the ferro-molybdenum alloy product described in the above embodiment. The present application uses molybdenum-containing waste slag as the raw material for the preparation of the ferro-molybdenum alloy product. The molybdenum content in the molybdenum-containing waste slag is much lower than that of molybdenite. By using the preparation method of the present application, a directly usable ferro-molybdenum alloy product can be prepared from molybdenum-containing waste slag with a minimum molybdenum content of 4%. An electric arc furnace is used for preliminary smelting. At a temperature of 2200-2700°C, the molybdenum-containing waste slag can react with a reducing agent to reduce molybdenum oxide and iron oxide. At the same time, the auxiliary agent can prevent the local reaction from being too violent to obtain a ferro-molybdenum alloy. The ferro-molybdenum alloy is further refined by a universal refining furnace to improve the purity of the ferro-molybdenum alloy product to obtain a ferro-molybdenum alloy product that can be directly used.

[0053] The present application is described below with reference to specific embodiments and comparative examples.

[0054] Example 1

[0055] (1) selecting molybdenum-containing waste slag and waste material as the preparation raw material, wherein the molybdenum content in the molybdenum-containing waste slag and waste material is 4%;

[0056] (2) placing the prepared raw materials in an electric arc furnace, adding a reducing agent and an auxiliary agent for preliminary smelting at a smelting temperature of 2500° C. for 4 hours to obtain a molybdenum-iron alloy;

[0057] (3) The ferro-molybdenum alloy is refined by a universal refining furnace at a refining temperature of 2800° C. for 6 h to obtain a ferro-molybdenum alloy product.

[0058] The reducing agent is single carbon, the auxiliary agent is sodium carbonate, 100 parts by mass of molybdenum-containing waste slag and waste, 15 parts by mass of the reducing agent, and 12 parts by mass of the auxiliary agent.

[0059] Example 2

[0060] (1) selecting molybdenum-containing waste slag and waste material as the preparation raw material, wherein the molybdenum content in the molybdenum-containing waste slag and waste material is 4%;

[0061] (2) placing the prepared raw materials in an electric arc furnace, adding a reducing agent and an auxiliary agent for preliminary smelting at a smelting temperature of 2200° C. for a smelting time of 4 h to obtain a molybdenum-iron alloy;

[0062] (3) Refining the ferro-molybdenum alloy in a universal refining furnace at a refining temperature of 2500° C. for 6 h to obtain a ferro-molybdenum alloy product.

[0063] The reducing agent is single carbon, the auxiliary agent is sodium carbonate, 100 parts by mass of molybdenum-containing waste slag and waste, 15 parts by mass of the reducing agent, and 12 parts by mass of the auxiliary agent.

[0064] Example 3

[0065] (1) selecting molybdenum-containing waste slag and waste material as the preparation raw material, wherein the molybdenum content in the molybdenum-containing waste slag and waste material is 4%;

[0066] (2) placing the prepared raw materials in an electric arc furnace, adding a reducing agent and an auxiliary agent for preliminary smelting at a smelting temperature of 2700° C. for a smelting time of 4 h to obtain a molybdenum-iron alloy;

[0067] (3) Refining the ferro-molybdenum alloy in a universal refining furnace at a refining temperature of 3000° C. for 6 h to obtain a ferro-molybdenum alloy product.

[0068] The reducing agent is single carbon, the auxiliary agent is sodium carbonate, 100 parts by mass of molybdenum-containing waste slag and waste, 15 parts by mass of the reducing agent, and 12 parts by mass of the auxiliary agent.

[0069] Example 4

[0070] (1) selecting molybdenum-containing waste slag and waste material as the preparation raw material, wherein the molybdenum content in the molybdenum-containing waste slag and waste material is 4%;

[0071] (2) placing the prepared raw materials in an electric arc furnace, adding a reducing agent and an auxiliary agent for preliminary smelting at a smelting temperature of 2500° C. for 5 h to obtain a molybdenum-iron alloy;

[0072] (3) The ferro-molybdenum alloy is refined by a universal refining furnace at a refining temperature of 2800° C. for 8 h to obtain a ferro-molybdenum alloy product.

[0073] The reducing agent is single carbon, the auxiliary agent is sodium carbonate, 100 parts by mass of molybdenum-containing waste slag and waste, 15 parts by mass of the reducing agent, and 12 parts by mass of the auxiliary agent.

[0074] Example 5

[0075] (1) selecting molybdenum-containing waste slag and waste material as the preparation raw material, wherein the molybdenum content in the molybdenum-containing waste slag and waste material is 4%;

[0076] (2) placing the prepared raw materials in an electric arc furnace, adding a reducing agent and an auxiliary agent for preliminary smelting at a smelting temperature of 2500° C. for 3 h to obtain a molybdenum-iron alloy;

[0077] (3) Refining the ferro-molybdenum alloy in a universal refining furnace at a refining temperature of 2800° C. for 5 h to obtain a ferro-molybdenum alloy product.

[0078] The reducing agent is single carbon, the auxiliary agent is sodium carbonate, 100 parts by mass of molybdenum-containing waste slag and waste, 15 parts by mass of the reducing agent, and 12 parts by mass of the auxiliary agent.

[0079] Example 6

[0080] (1) selecting molybdenum-containing waste slag and waste material as the preparation raw material, wherein the molybdenum content in the molybdenum-containing waste slag and waste material is 5%;

[0081] (2) placing the prepared raw materials in an electric arc furnace, adding a reducing agent and an auxiliary agent for preliminary smelting at a smelting temperature of 2500° C. for 4 hours to obtain a molybdenum-iron alloy;

[0082] (3) The ferro-molybdenum alloy is refined by a universal refining furnace at a refining temperature of 2800° C. for 6 h to obtain a ferro-molybdenum alloy product.

[0083] The reducing agent is single carbon, the auxiliary agent is sodium carbonate, 100 parts by mass of molybdenum-containing waste slag and waste, 15 parts by mass of the reducing agent, and 12 parts by mass of the auxiliary agent.

[0084] Example 7

[0085] (1) selecting molybdenum-containing waste slag and waste as the preparation raw material, wherein the molybdenum content in the molybdenum-containing waste slag and waste is 8%;

[0086] (2) placing the prepared raw materials in an electric arc furnace, adding a reducing agent and an auxiliary agent for preliminary smelting at a smelting temperature of 2500° C. for 4 hours to obtain a molybdenum-iron alloy;

[0087] (3) The ferro-molybdenum alloy is refined by a universal refining furnace at a refining temperature of 2800° C. for 6 h to obtain a ferro-molybdenum alloy product.

[0088] The reducing agent is single carbon, the auxiliary agent is sodium carbonate, 100 parts by mass of molybdenum-containing waste slag and waste, 15 parts by mass of the reducing agent, and 12 parts by mass of the auxiliary agent.

[0089] Example 8

[0090] (1) selecting molybdenum-containing waste slag and waste material as the preparation raw material, wherein the molybdenum content in the molybdenum-containing waste slag and waste material is 4%;

[0091] (2) placing the prepared raw materials in an electric arc furnace, adding a reducing agent and an auxiliary agent for preliminary smelting at a smelting temperature of 2500° C. for 4 hours to obtain a molybdenum-iron alloy;

[0092] (3) The ferro-molybdenum alloy is refined by a universal refining furnace at a refining temperature of 2800° C. for 6 h to obtain a ferro-molybdenum alloy product.

[0093] The reducing agent is single carbon, the auxiliary agent is sodium carbonate, 100 parts by mass of molybdenum-containing waste slag and waste, 10 parts by mass of the reducing agent, and 12 parts by mass of the auxiliary agent.

[0094] Example 9

[0095] (1) selecting molybdenum-containing waste slag and waste material as the preparation raw material, wherein the molybdenum content in the molybdenum-containing waste slag and waste material is 4%;

[0096] (2) placing the prepared raw materials in an electric arc furnace, adding a reducing agent and an auxiliary agent for preliminary smelting at a smelting temperature of 2500° C. for 4 hours to obtain a molybdenum-iron alloy;

[0097] (3) The ferro-molybdenum alloy is refined by a universal refining furnace at a refining temperature of 2800° C. for 6 h to obtain a ferro-molybdenum alloy product.

[0098] The reducing agent is single carbon, the auxiliary agent is sodium carbonate, 100 parts by mass of molybdenum-containing waste slag and waste, 20 parts by mass of the reducing agent, and 12 parts by mass of the auxiliary agent.

[0099] Example 10

[0100] (1) selecting molybdenum-containing waste slag and waste as the preparation raw material, wherein the molybdenum content in the molybdenum-containing waste slag and waste is 8%;

[0101] (2) placing the prepared raw materials in an electric arc furnace, adding a reducing agent and an auxiliary agent for preliminary smelting at a smelting temperature of 2600° C. for a smelting time of 4 h to obtain a molybdenum-iron alloy;

[0102] (3) The ferro-molybdenum alloy is refined by a universal refining furnace at a refining temperature of 2900° C. for 6 h to obtain a ferro-molybdenum alloy product.

[0103] The reducing agent is single carbon, the auxiliary agent is sodium carbonate, 100 parts by mass of molybdenum-containing waste slag and waste, 18 parts by mass of the reducing agent, and 12 parts by mass of the auxiliary agent.

[0104] The purity and yield of the ferromolybdenum alloys prepared in Examples 1 to 10 were tested. The test results are shown in Table 1 below.

[0105] Table 1

[0106] purity / % Yield / % Example 1 59.6 95.4 Example 2 55.2 94.7 Example 3 62.1 96.2 Example 4 61.4 97.3 Example 5 57.6 95.1 Example 6 60.9 93.8 Example 7 61.8 96.8 Example 8 59.5 95.9 Example 9 59.0 96.6 Example 10 63.7 98.1

[0107] It can be seen from Table 1 that the preparation method of the molybdenum-iron alloy product in the embodiment of the present application can obtain a product with a purity that meets the requirements of the molybdenum-iron alloy grade.

[0108] The serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0109] The above are only preferred embodiments of the present application, and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A method for preparing a ferromolybdenum alloy product, characterized in that: The preparation method of the ferromolybdenum alloy product comprises the following steps: Selecting molybdenum-containing waste slag as the preparation raw material, wherein the minimum molybdenum content in the molybdenum-containing waste slag is 4%; Placing the prepared raw material in an electric arc furnace, adding a reducing agent and an auxiliary agent for preliminary smelting at a smelting temperature of 2200-2700° C., and obtaining a molybdenum-iron alloy; The ferromolybdenum alloy is refined by a universal refining furnace to obtain a ferromolybdenum alloy product.

2. The method for preparing a ferromolybdenum alloy product according to claim 1, wherein: The reducing agent includes at least one of carbon element, silicon element and active metal.

3. The method for preparing a ferromolybdenum alloy product according to claim 1, wherein: The auxiliary agent includes at least one of a sodium source and a calcium source.

4. The method for preparing a ferromolybdenum alloy product according to claim 1, wherein: The time for the preliminary smelting is 3-5h.

5. The method for preparing a ferromolybdenum alloy product according to claim 1, characterized in that: The refining time is 5-8h.

6. The method for preparing a ferromolybdenum alloy product according to claim 1, characterized in that: The refining temperature is 2500-3000°C.

7. The method for preparing a ferromolybdenum alloy product according to claim 1, characterized in that: The content of molybdenum element in the ferromolybdenum alloy product is 50%-65%.

8. The method for preparing a ferromolybdenum alloy product according to claim 1, characterized in that: The mass ratio between the molybdenum-containing waste slag and the reducing agent is 100:10-100:

20.

9. The method for preparing a ferromolybdenum alloy product according to claim 1, characterized in that: The mass ratio between the molybdenum-containing waste slag and the additive is 100:8-100:

15.

10. A molybdenum-iron alloy product, characterized in that: The ferromolybdenum alloy product is prepared by the method for preparing a ferromolybdenum alloy product according to any one of claims 1 to 9.

Images