Treatment method of vanadium-iron alloy and vanadium-iron alloy

Abstract

The invention discloses a treatment method of a vanadium-iron alloy and the vanadium-iron alloy. The method comprises the following steps: naturally cooling the vanadium-iron alloy to obtain a vanadium-iron alloy cake; the ferrovanadium alloy cake is kept in a first cooling environment for a first time period to be cooled for the first time till the temperature is not larger than a first preset temperature; the ferrovanadium alloy cake cooled for the first time is kept in a second cooling environment different from the first cooling environment for a second time period to be cooled for the second time till the temperature is not larger than a second preset temperature; and carrying out subsequent operation on the vanadium-iron alloy cake subjected to secondary cooling to obtain the vanadium-iron alloy. According to the scheme provided by the invention, the problems of high safety risk, long cooling time, high ferrovanadium alloy hardness, long crushing time, high fine powder rate, high loss of crushing equipment, high failure rate, low production efficiency of a crushing system and the like existing in a primary water cooling mode in the prior art can be solved.

Description

Technical Field

[0001] This invention relates to the field of ferrovanadium alloys, and more specifically to a method for processing ferrovanadium alloys and ferrovanadium alloys themselves. Background Technology

[0002] Currently, the cooling of ferrovanadium alloy cakes is mostly done using a single-stage water cooling method. This method poses a significant safety risk due to the risk of explosion when the ferrovanadium alloy cake is submerged in water. Furthermore, since the ferrovanadium alloy cake has a 50-200mm thick layer of brittle material on all sides except the top surface which is free of slag, the high temperature (600-800℃ on the top surface) and the large temperature difference between the brittle material layer and the ferrovanadium alloy layer make rapid water cooling prone to explosions, long cooling times (the heat is mainly carried away by water evaporation in the later stages of water quenching), high hardness of the ferrovanadium alloy, long crushing time, high fine powder content during crushing, high wear and tear and high failure rate of crushing equipment, and low production efficiency of the crushing system. Additionally, the rapid cooling of the ferrovanadium alloy cake with large amounts of cooling water results in high brittleness of the ferrovanadium alloy, easy cracking during water quenching leading to surface oxidation and blackening of the surface color, and a high fine powder content. Summary of the Invention

[0003] In view of this, in order to overcome at least one aspect of the above-mentioned problems, embodiments of the present invention propose a method for processing ferrovanadium alloys, comprising the following steps: Vanadium-iron alloy cakes were obtained by natural cooling of vanadium-iron alloy. The vanadium-iron alloy cake is kept in the first cooling environment for a first time period to perform the first cooling until the temperature is not greater than the first preset temperature. The vanadium-iron alloy cake, after the first cooling, is kept in a second cooling environment, different from the first cooling environment, for a second time period to perform a second cooling, until the temperature is not greater than the second preset temperature. The vanadium-iron alloy cake after the second cooling is then subjected to further processing to obtain vanadium-iron alloy.

[0004] In some embodiments, obtaining ferrovanadium alloy cakes by natural cooling of the ferrovanadium alloy further includes: The vanadium-iron alloy and slag are poured into the ingot mold together and allowed to cool naturally for 12-28 hours before demolding. After demolding, allow natural cooling for 4-14 hours to separate slag and iron, and obtain the vanadium-iron alloy cake. The vanadium-iron alloy cake is allowed to cool naturally for 0.5-4 hours until the vanadium-iron alloy layer on the upper surface of the cake has solidified and is no longer liquid.

[0005] In some embodiments, the ferrovanadium alloy cake is kept in a first cooling environment for a first time period for a first cooling process until the temperature is not greater than a first preset temperature, further comprising: The vanadium-iron alloy cake is placed in the first water quenching tank and cooled for 10-60 minutes until the temperature of the vanadium-iron alloy cake does not exceed 400°C.

[0006] In some embodiments, the method for processing ferrovanadium alloys further includes: Before the first cooling, the water temperature in the first water quenching tank is controlled at 5-35℃. When the first cooling is finished, the water temperature in the first water quenching tank is controlled at no more than 60℃.

[0007] In some embodiments, the ferrovanadium alloy cake, after the first cooling, is kept in a second cooling environment different from the first cooling environment for a second time period for a second cooling period until the temperature is not higher than a second preset temperature, further including: After the first cooling, the vanadium-iron alloy cake is placed in a second water quenching tank for 1.5-4 hours of cooling until the temperature of the vanadium-iron alloy cake does not exceed 100°C.

[0008] In some embodiments, the method for processing ferrovanadium alloys further includes: Before the second cooling, the water temperature in the second water quenching tank is controlled at 5-35℃. When the second cooling is finished, the water temperature in the second water quenching tank is controlled at no more than 60℃.

[0009] In some embodiments, the ferrovanadium alloy cake is kept in a first cooling environment for a first time period for a first cooling process until the temperature is not greater than a first preset temperature, further comprising: The vanadium-iron alloy cake is sprayed with water at 5-30°C for 20-60 minutes to cool it until the temperature of the vanadium-iron alloy cake does not exceed 500°C.

[0010] In some embodiments, the ferrovanadium alloy cake, after the first cooling, is kept in a second cooling environment different from the first cooling environment for a second time period for a second cooling period until the temperature is not higher than a second preset temperature, further including: The vanadium-iron alloy cake, after being sprayed, is placed in a water quenching tank for 1.5-4 hours to cool until the temperature of the vanadium-iron alloy cake does not exceed 100°C.

[0011] In some embodiments, the method for processing ferrovanadium alloys further includes: Before the second cooling, the water temperature in the water quenching tank is controlled at 5-35℃, and at the end of the second cooling, the water temperature in the water quenching tank is controlled at no more than 60℃.

[0012] Based on the same inventive concept, according to another aspect of the present invention, embodiments of the present invention also provide a vanadium-iron alloy, which is prepared by the method described in any of the above embodiments.

[0013] The present invention has one of the following beneficial technical effects: The solution proposed in the present invention can solve the problems of high risk of explosion, long cooling time, high hardness of ferrovanadium alloy, long crushing time, high fine powder ratio, high wear and failure rate of crushing equipment, and low production efficiency of crushing system in the prior art using a single-stage water cooling method. At the same time, it solves the problems of high brittleness of ferrovanadium alloy and easy fracture caused by rapid cooling with a large amount of cooling water, resulting in surface oxidation, blackening of appearance color, and high fine powder ratio. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other embodiments can be obtained based on these drawings without creative effort.

[0015] Figure 1 A schematic flowchart illustrating a method for processing ferrovanadium alloys according to an embodiment of the present invention. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be further described in detail below with reference to specific examples and the accompanying drawings.

[0017] It should be noted that all uses of "first" and "second" in the embodiments of the present invention are for the purpose of distinguishing two entities or parameters with the same name but different names. It is clear that "first" and "second" are only for the convenience of expression and should not be construed as limiting the embodiments of the present invention. Subsequent embodiments will not explain this in detail.

[0018] According to one aspect of the present invention, embodiments of the present invention provide a method for processing ferrovanadium alloys, such as... Figure 1 As shown, it may include the following steps: S1. Obtain ferrovanadium alloy cake by natural cooling of ferrovanadium alloy. S2. The vanadium-iron alloy cake is kept in the first cooling environment for a first time period to perform the first cooling until the temperature is not greater than the first preset temperature. S3. The vanadium-iron alloy cake after the first cooling is kept in a second cooling environment different from the first cooling environment for a second time period for a second cooling period until the temperature is not greater than the second preset temperature. S4. The vanadium-iron alloy cake after the second cooling is subjected to subsequent operations to obtain vanadium-iron alloy.

[0019] The solution proposed in this invention can solve the problems of high risk of explosion, long cooling time, high hardness of ferrovanadium alloy, long crushing time, high fine powder ratio, high wear and failure rate of crushing equipment, and low production efficiency of crushing system in the existing technology using single-stage water cooling. At the same time, it solves the problems of high brittleness of ferrovanadium alloy caused by rapid cooling with a large amount of cooling water, resulting in surface oxidation, blackening of appearance color, and high fine powder ratio.

[0020] In some embodiments, obtaining ferrovanadium alloy cakes by natural cooling of the ferrovanadium alloy further includes: The vanadium-iron alloy and slag are poured into the ingot mold together and allowed to cool naturally for 12-28 hours before demolding. After demolding, allow natural cooling for 4-14 hours to separate slag and iron, and obtain the vanadium-iron alloy cake. The vanadium-iron alloy cake is allowed to cool naturally for 0.5-4 hours until the vanadium-iron alloy layer on the upper surface of the cake has solidified and is no longer liquid.

[0021] Specifically, in the initial stage of the ferrovanadium alloy cooling process, the ferrovanadium alloy and slag are first poured into an ingot mold together and allowed to cool naturally for 12-28 hours before being demolded. This step, through a relatively long period of natural cooling, allows the ferrovanadium alloy to cool slowly within the ingot mold, avoiding the drastic temperature changes that might result from direct water cooling. This reduces the risk of explosion due to excessive thermal stress from the outset and establishes a stable temperature base for subsequent processing.

[0022] After demolding, the ferrovanadium alloy is allowed to cool naturally for 4-14 hours, followed by slag-iron separation to obtain ferrovanadium alloy cakes. This natural cooling stage further lowers the temperature of the ferrovanadium alloy, making the slag-iron separation process smoother, reducing operational difficulties caused by excessively high temperatures, and also avoiding the problem of increased brittleness of the ferrovanadium alloy that may be caused by rapid cooling.

[0023] Next, the separated ferrovanadium alloy cake is allowed to cool naturally for 0.5-4 hours until the ferrovanadium alloy layer on the surface of the cake is completely solidified and no longer liquid. This step ensures the stability of the overall solidification state of the ferrovanadium alloy cake, preparing it for the subsequent two-stage water cooling process. This avoids uneven local stress caused by partially unsolidified parts during water cooling, thereby reducing problems such as oxidation of the ferrovanadium alloy surface, blackening of the appearance color, and high fine powder content. It also provides higher quality raw materials for subsequent finishing and crushing operations, helping to reduce the wear and failure rate of crushing equipment and improve the production efficiency of the crushing system.

[0024] In some embodiments, the ferrovanadium alloy cake is kept in a first cooling environment for a first time period for a first cooling process until the temperature is not greater than a first preset temperature, further comprising: The vanadium-iron alloy cake is placed in the first water quenching tank and cooled for 10-60 minutes until the temperature of the vanadium-iron alloy cake does not exceed 400°C.

[0025] In some embodiments, it also includes: Before the first cooling, the water temperature in the first water quenching tank is controlled at 5-35℃. When the first cooling is finished, the water temperature in the first water quenching tank is controlled at no more than 60℃.

[0026] Specifically, before the first cooling, the water temperature in the first water quenching tank needs to be pre-controlled between 5-35℃. This temperature range provides a suitable initial environment for the cooling process, ensuring cooling efficiency while avoiding problems such as cracking of the ferrovanadium alloy cake due to excessive stress caused by rapid cooling caused by excessively low water temperature.

[0027] Subsequently, the ferrovanadium alloy cake is placed in the first water quenching tank for 10-60 minutes of cooling treatment until its temperature drops to no more than 400°C. This cooling time and target temperature setting is based on a balance between cooling rate and the properties of the ferrovanadium alloy: a reasonable cooling time of 10-60 minutes can quickly reduce the temperature of the ferrovanadium alloy cake, allowing time for subsequent processing, without causing a significant increase in its brittleness due to excessively rapid cooling; while controlling the temperature below 400°C effectively lays the foundation for the second stage of cooling and reduces the difficulty of subsequent crushing.

[0028] In addition, at the end of the first cooling process, the water temperature in the first water quenching tank must be controlled to no more than 60°C. This requirement ensures the stability of the cooling process, avoids affecting the cooling effect due to excessively high water temperature, reduces the wear and tear on the water quenching tank caused by long-term high-temperature operation, ensures the stable operation of the equipment, and thus works in conjunction with the entire cooling process to achieve the goals of reducing the difficulty of crushing ferrovanadium alloys, reducing the fine powder rate, and improving production efficiency.

[0029] In some embodiments, the ferrovanadium alloy cake, after the first cooling, is kept in a second cooling environment different from the first cooling environment for a second time period for a second cooling period until the temperature is not higher than a second preset temperature, further including: After the first cooling, the vanadium-iron alloy cake is placed in a second water quenching tank for 1.5-4 hours of cooling until the temperature of the vanadium-iron alloy cake does not exceed 100°C.

[0030] In some embodiments, it also includes: Before the second cooling, the water temperature in the second water quenching tank is controlled at 5-35℃. When the second cooling is finished, the water temperature in the second water quenching tank is controlled at no more than 60℃.

[0031] Specifically, before the second cooling process, the water temperature in the second water quenching tank needs to be pre-controlled between 5-35℃. This initial water temperature setting is consistent with that of the first water quenching tank, which ensures the stability of the cooling process and avoids adverse effects on the performance of the ferrovanadium alloy cake due to excessive water temperature fluctuations, thus providing a foundation for efficient cooling in the future.

[0032] Subsequently, the ferrovanadium alloy cake, after its first cooling (temperature reduced to no more than 400℃), is placed in a second water quenching tank for 1.5-4 hours of cooling treatment, until the temperature of the ferrovanadium alloy cake drops to no more than 100℃. Compared to the first cooling, the second stage of cooling takes longer (1.5-4 hours) because the ferrovanadium alloy cake needs to be further cooled from below 400℃ to below 100℃. The longer cooling time allows for a smoother cooling process, avoiding a sudden increase in the brittleness of the ferrovanadium alloy cake due to rapid cooling. At the same time, it ensures that the temperature can be stably controlled within the target range, creating favorable conditions for subsequent finishing and crushing operations. For example, a temperature below 100℃ can significantly reduce the difficulty of crushing, reduce the generation of fine powder, and avoid damage to the crushing equipment caused by high temperatures.

[0033] In addition, at the end of the second cooling, the water temperature in the second water quenching tank must be controlled at no more than 60°C. This control requirement not only ensures the stability of the cooling effect and prevents the final cooling efficiency from being affected by excessively high water temperature, but also extends the service life of the water quenching tank equipment and ensures the continuous and stable operation of the entire cooling system. This, in turn, works synergistically with the first cooling to achieve the goals of reducing safety risks, shortening cooling time, optimizing the performance of ferrovanadium alloys, and improving production efficiency.

[0034] In some embodiments, the ferrovanadium alloy cake is kept in a first cooling environment for a first time period for a first cooling process until the temperature is not greater than a first preset temperature, further comprising: The vanadium-iron alloy cake is sprayed with water at 5-30°C for 20-60 minutes to cool it until the temperature of the vanadium-iron alloy cake does not exceed 500°C.

[0035] Specifically, the first cooling can also be done by spraying. For example, water at a temperature of 5-30℃ can be sprayed onto the ferrovanadium alloy cake for 20-60 minutes until the temperature of the ferrovanadium alloy cake drops to no more than 500℃.

[0036] During this process, a water temperature setting of 5-30℃ ensures sufficient cooling efficiency while preventing the ferrovanadium alloy cake from cracking due to excessive stress caused by drastic temperature differences caused by excessively low water temperatures. A cooling time of 20-60 minutes provides a reasonable period for the temperature to drop to the target range, allowing for a smooth reduction in the temperature of the ferrovanadium alloy cake. Setting the cooling target to no more than 500℃ provides a suitable temperature foundation for subsequent cooling processes while avoiding adverse effects of excessively high temperatures on subsequent steps. Furthermore, the spraying method ensures that the cooling water acts more evenly on the surface of the ferrovanadium alloy cake, improving cooling uniformity and reducing fluctuations in ferrovanadium alloy properties caused by localized temperature differences. This, combined with the overall cooling process, helps improve the brittleness of the ferrovanadium alloy and reduce surface oxidation, creating favorable conditions for subsequent finishing and crushing operations.

[0037] In some embodiments, the ferrovanadium alloy cake, after the first cooling, is kept in a second cooling environment different from the first cooling environment for a second time period for a second cooling period until the temperature is not higher than a second preset temperature, further including: The vanadium-iron alloy cake, after being sprayed, is placed in a water quenching tank for 1.5-4 hours to cool until the temperature of the vanadium-iron alloy cake does not exceed 100°C.

[0038] In some embodiments, it also includes: Before the second cooling, the water temperature in the water quenching tank is controlled at 5-35℃, and at the end of the second cooling, the water temperature in the water quenching tank is controlled at no more than 60℃.

[0039] Specifically, in the second cooling stage, for the ferrovanadium alloy cake after the first spray cooling, the specific operation is as follows: First, before the second cooling, the water temperature in the quenching tank must be pre-controlled between 5-35℃. This initial water temperature setting provides a stable low-temperature environment for the cooling process, ensuring the cooling effect, and also avoids excessive internal stress caused by a sudden drop in temperature in the vanadium-iron alloy cake due to excessively low water temperature, thereby reducing the occurrence of problems such as cracking and surface oxidation of the vanadium-iron alloy cake.

[0040] Subsequently, the ferrovanadium alloy cake, after its first spray cooling, is placed in the water quenching tank for 1.5-4 hours of cooling treatment, until its temperature drops to no more than 100°C. Compared to the first spray cooling, the second stage uses water immersion in the quenching tank, and the cooling time is longer (1.5-4 hours). This is because the ferrovanadium alloy cake needs to be further and steadily reduced from its initial temperature (no more than 500°C) to below 100°C. The longer cooling time allows for a more gradual cooling process, avoiding increased brittleness of the ferrovanadium alloy due to excessively rapid cooling. It also ensures a uniform temperature drop across the entire ferrovanadium alloy cake, providing suitable conditions for subsequent finishing and crushing operations—a temperature below 100°C significantly reduces crushing difficulty, decreases the fine powder content, and lowers the wear and failure rate of the crushing equipment.

[0041] Furthermore, at the end of the second cooling process, the water temperature in the quenching tank must be controlled to no more than 60°C. This requirement ensures the effectiveness of the cooling process, prevents excessively high water temperatures from affecting the final cooling effect, and avoids excessive wear and tear on the quenching tank due to prolonged exposure to high temperatures. This ensures stable equipment operation and, in turn, works synergistically with the first spray cooling to optimize the cooling effect of the ferrovanadium alloy, thereby improving the efficiency and quality of subsequent processing.

[0042] Example 1 (First cooling method: natural cooling + first water quenching tank + second water quenching tank) Natural cooling: Vanadium-iron alloy and slag are poured into ingot molds, and the molds are removed after 12 hours of natural cooling. After removal, the slag and iron are separated by natural cooling for 4 hours, and then the molds are naturally cooled for another 0.5 hours until there is no liquid on the surface.

[0043] First cooling: Place in the first water quenching tank with a water temperature of 5℃ and cool for 10 minutes until the temperature reaches 380℃. At the end, the water temperature rises to 50℃.

[0044] Second cooling: Transfer to a second water quenching tank with a water temperature of 5°C, cool for 1.5 hours until the temperature reaches 80°C, and at the end, the water temperature rises to 50°C.

[0045] Two cooling cycles take only 1 hour and 60 minutes. The ferrovanadium alloy has moderate hardness and is easy to break. During the crushing process, the ferrovanadium crushing time is only 1.5 hours per furnace, and the failure rate of the iron crusher and crusher equipment is greatly reduced. The fine powder rate of the ferrovanadium crushing process is 10%. The ferrovanadium has normal brittleness and good crushing condition. Surface oxidation, color spots, and blackening are greatly reduced.

[0046] Example 2 (First cooling method: natural cooling + first water quenching tank + second water quenching tank) Natural cooling: Vanadium-iron alloy and slag are poured into ingot molds and naturally cooled for 20 hours before being removed from the molds. After removal from the molds, the slag and iron are separated by natural cooling for 9 hours, and then naturally cooled for another 2 hours until there is no liquid on the surface.

[0047] First cooling: Place in the first water quenching tank at 20°C and cool for 35 minutes until the temperature reaches 390°C. At the end, the water temperature rises to 55°C.

[0048] Second cooling: Transfer to a second water quenching tank with a water temperature of 20°C, cool for 2.5 hours until the temperature reaches 90°C, and at the end the water temperature rises to 55°C.

[0049] Two cooling cycles take only 4 hours and 5 minutes. The ferrovanadium alloy has moderate hardness and is easy to break. During the crushing process, the ferrovanadium crushing time is only 1.8 hours per furnace, and the failure rate of the iron smashing machine and crusher equipment is greatly reduced. The fine powder rate of the ferrovanadium crushing process is 12%. The ferrovanadium has normal brittleness and good crushing condition. Surface oxidation, color spots, and blackening are greatly reduced.

[0050] Example 3 (First cooling method: natural cooling + first water quenching tank + second water quenching tank) Natural cooling: Vanadium-iron alloy and slag are poured into ingot molds and naturally cooled for 28 hours before being removed from the molds. After removal from the molds, the slag and iron are separated by natural cooling for 14 hours, and then naturally cooled for another 4 hours until there is no liquid on the surface.

[0051] First cooling: Place in the first water quenching tank at 35°C and cool for 60 minutes until the temperature reaches 400°C. At the end, the water temperature rises to 60°C.

[0052] Second cooling: Transfer to a second water quenching tank at 35°C and cool for 4 hours until the temperature reaches 100°C. At the end, the water temperature rises to 60°C.

[0053] Two cooling cycles only require 5 hours. The ferrovanadium alloy has moderate hardness and is easy to break. During the crushing process, the ferrovanadium crushing time is only 1.7 hours per furnace, and the failure rate of the iron smashing machine and crusher equipment is greatly reduced. The fine powder rate of the ferrovanadium crushing process is 14%. The ferrovanadium has normal brittleness and good crushing condition. Surface oxidation, color spots, and blackening are greatly reduced.

[0054] Example 4 (Second cooling method: natural cooling + spray cooling + water quenching tank) Natural cooling: Vanadium-iron alloy and slag are poured into ingot molds, and the molds are removed after 12 hours of natural cooling. After removal, the slag and iron are separated by natural cooling for 4 hours, and then the molds are naturally cooled for another 0.5 hours until there is no liquid on the surface.

[0055] First cooling: Spray with 5℃ water for 20 minutes until the temperature is ≤500℃.

[0056] Second cooling: Place in a water quenching tank at 5°C and cool for 1.5 hours until the temperature is ≤100°C. At the end, the water temperature is ≤60°C.

[0057] Two cooling cycles take only 1 hour and 50 minutes. The ferrovanadium alloy has moderate hardness and is easy to break. During the crushing process, the ferrovanadium crushing time is only 1.9 hours per furnace, and the failure rate of the iron smashing machine and crusher equipment is greatly reduced. The fine powder rate of the ferrovanadium crushing process is 15%. The ferrovanadium has normal brittleness and good crushing condition. Surface oxidation, color spots, and blackening are greatly reduced.

[0058] Example 5 (Second cooling method: natural cooling + spray cooling + water quenching tank) Cooling method: Natural cooling: Vanadium-iron alloy and slag are poured into ingot molds and naturally cooled for 20 hours before being removed from the molds. After removal from the molds, the slag and iron are separated by natural cooling for 9 hours, and then naturally cooled for another 2 hours until there is no liquid on the surface.

[0059] First cooling: Spray with 17℃ water for 40 minutes until the temperature is ≤500℃.

[0060] Second cooling: Place in a water quenching tank at 20°C and cool for 2.5 hours until the temperature is ≤100°C. At the end, the water temperature is ≤60°C.

[0061] Two cooling cycles take only 3 hours and 10 minutes. The ferrovanadium alloy has moderate hardness and is easy to break. During the crushing process, the ferrovanadium crushing time is only 2 hours per furnace, and the failure rate of the iron crusher and crusher equipment is greatly reduced. The fine powder rate of the ferrovanadium crushing process is 16%. The ferrovanadium has normal brittleness and good crushing condition. Surface oxidation, color spots, and blackening are greatly reduced.

[0062] Example 6 (Second cooling method: natural cooling + spray cooling + water quenching tank) Natural cooling: Vanadium-iron alloy and slag are poured into ingot molds and naturally cooled for 28 hours before being removed from the molds. After removal from the molds, the slag and iron are separated by natural cooling for 14 hours, and then naturally cooled for another 4 hours until there is no liquid on the surface.

[0063] First cooling: Spray with 30℃ water for 60 minutes until the temperature is ≤500℃.

[0064] Second cooling: Place in a water quenching tank at 35°C and cool for 4 hours until the temperature is ≤100°C (the water temperature at the end is ≤60°C).

[0065] Two cooling cycles only require 5 hours. The ferrovanadium alloy has moderate hardness and is easy to break. During the crushing process, the ferrovanadium crushing time is only 1.6 hours per furnace, and the failure rate of the iron crusher and crusher equipment is greatly reduced. The fine powder rate of the ferrovanadium crushing process is 13%. The ferrovanadium has normal brittleness and good crushing condition. Surface oxidation, color spots, and blackening are greatly reduced.

[0066] Comparative Example After smelting ferrovanadium alloy, the ferrovanadium cake is directly cooled by a single-stage water cooling method without natural cooling pretreatment. It is directly immersed in a large amount of cooling water for rapid cooling. The cooling process relies on water evaporation to remove heat, without segmented temperature control or water temperature control measures.

[0067] The complete cooling time is greater than 5 hours, and the resulting ferrovanadium is hard and difficult to break, resulting in a high failure rate of the iron crusher and crusher equipment; the ferrovanadium crushing time is 3 hours per furnace; the fine powder rate of the ferrovanadium crushing process is 20%; ferrovanadium is brittle and easily breaks; the surface is severely oxidized, with obvious colored spots and blackening; and it is prone to explosion due to the large temperature difference when it is submerged in water, posing a high safety risk.

[0068] Based on the same inventive concept, according to another aspect of the present invention, embodiments of the present invention also provide a vanadium-iron alloy, which is prepared by the method described in any of the above embodiments.

[0069] The above are exemplary embodiments disclosed in this invention. However, it should be noted that various changes and modifications can be made without departing from the scope of the embodiments of this invention as defined by the claims. The functions, steps, and / or actions of the methods according to the disclosed embodiments described herein do not need to be performed in any particular order. Furthermore, although the elements disclosed in the embodiments of this invention may be described or claimed individually, they may be understood as multiple unless explicitly limited to a singular number.

[0070] It should be understood that, as used herein, the singular form “a” is intended to include the plural form as well, unless the context clearly supports an exception. It should also be understood that, as used herein, “and / or” refers to any and all possible combinations of one or more of the associated listed items.

[0071] The embodiment numbers disclosed in the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0072] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the invention (including the claims) is limited to these examples. Within the framework of the invention, technical features of the above embodiments or different embodiments can be combined, and many other variations of different aspects of the invention exist, which are not provided in the details for the sake of brevity. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the invention should be included within the protection scope of the invention.

Claims

1. A method for processing ferrovanadium alloy, characterized in that, include: Vanadium-iron alloy cakes were obtained by natural cooling of vanadium-iron alloy. The vanadium-iron alloy cake is kept in the first cooling environment for a first time period to perform the first cooling until the temperature is not greater than the first preset temperature. The vanadium-iron alloy cake, after the first cooling, is kept in a second cooling environment, different from the first cooling environment, for a second time period to perform a second cooling, until the temperature is not greater than the second preset temperature. The vanadium-iron alloy cake after the second cooling is then subjected to further processing to obtain vanadium-iron alloy.

2. The method as described in claim 1, characterized in that, The ferrovanadium alloy cake is obtained by natural cooling of the ferrovanadium alloy, and further includes: The vanadium-iron alloy and slag are poured into the ingot mold together and allowed to cool naturally for 12-28 hours before demolding. After demolding, allow natural cooling for 4-14 hours to separate slag and iron, and obtain the vanadium-iron alloy cake. The vanadium-iron alloy cake is allowed to cool naturally for 0.5-4 hours until the vanadium-iron alloy layer on the upper surface of the cake has solidified and is no longer liquid.

3. The method as described in claim 1, characterized in that, The vanadium-iron alloy cake is held in a first cooling environment for a first time period for initial cooling until the temperature is not higher than a first preset temperature, further including: The vanadium-iron alloy cake is placed in the first water quenching tank and cooled for 10-60 minutes until the temperature of the vanadium-iron alloy cake does not exceed 400°C.

4. The method as described in claim 3, characterized in that, Also includes: Before the first cooling, the water temperature in the first water quenching tank is controlled at 5-35℃. When the first cooling is finished, the water temperature in the first water quenching tank is controlled at no more than 60℃.

5. The method as described in claim 3, characterized in that, The vanadium-iron alloy cake, after its first cooling, is kept in a second cooling environment, different from the first cooling environment, for a second time period for a second cooling process, until the temperature does not exceed a second preset temperature. This further includes: After the first cooling, the vanadium-iron alloy cake is placed in a second water quenching tank for 1.5-4 hours of cooling until the temperature of the vanadium-iron alloy cake does not exceed 100°C.

6. The method as described in claim 5, characterized in that, Also includes: Before the second cooling, the water temperature in the second water quenching tank is controlled at 5-35℃. When the second cooling is finished, the water temperature in the second water quenching tank is controlled at no more than 60℃.

7. The method as described in claim 1, characterized in that, The vanadium-iron alloy cake is held in a first cooling environment for a first time period for initial cooling until the temperature is not higher than a first preset temperature, further including: The vanadium-iron alloy cake is sprayed with water at 5-30°C for 20-60 minutes to cool it until the temperature of the vanadium-iron alloy cake does not exceed 500°C.

8. The method as described in claim 7, characterized in that, The vanadium-iron alloy cake, after its first cooling, is kept in a second cooling environment, different from the first cooling environment, for a second time period for a second cooling process, until the temperature does not exceed a second preset temperature. This further includes: The vanadium-iron alloy cake, after being sprayed, is placed in a water quenching tank for 1.5-4 hours to cool until the temperature of the vanadium-iron alloy cake does not exceed 100°C.

9. The method as described in claim 8, characterized in that, Also includes: Before the second cooling, the water temperature in the water quenching tank is controlled at 5-35℃, and at the end of the second cooling, the water temperature in the water quenching tank is controlled at no more than 60℃.

10. A vanadium-iron alloy, characterized in that, The vanadium-iron alloy is prepared using the method described in any one of claims 1-9.

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