A method for controlling the yield of vanadium-aluminum alloy

Abstract

The present invention discloses a method for controlling the yield of vanadium-aluminum alloy, which specifically comprises the following steps: (1) using a copper crucible and a graphite furnace body as a thermite reaction vessel; (2) mixing flaky vanadium pentoxide, aluminum particles and a slag-forming agent uniformly and adding the mixture to the thermite reaction vessel; (3) placing the reaction vessel filled with the mixed raw materials in a cooling pool with circulating water and installing a furnace cover; (4) igniting a magnesium strip to initiate the thermite reaction; (5) removing the furnace cover and the furnace body 5 to 8 minutes after the thermite reaction ends; (6) stopping the cooling water supply when the alloy ingot cools to 950°C and installing a heat-insulating furnace cover on the copper crucible; (7) cooling the alloy ingot naturally for 24 to 48 hours, and finishing the alloy after cooling to obtain a vanadium-aluminum alloy product. The present invention can increase the yield of vanadium-aluminum alloy to more than 86%.

Description

Technical Field

[0001] The invention belongs to the technical field of metal materials, and in particular relates to a method for controlling the yield of vanadium-aluminum alloy. Background Art

[0002] Vanadium-aluminum master alloys are important additives for titanium alloy production. The aluminothermic reduction method offers high yields, simple equipment, low investment, and rapid returns. However, the current aluminothermic reduction method lacks control over the cooling process, resulting in defects such as porosity and oxide film formation in the resulting ingots, resulting in a low yield.

[0003] The main reasons for the porosity and oxide film of vanadium-aluminum alloy ingots are as follows: (1) In the early cooling stage (≥1900℃), the cooling rate is slow, and the alloy with low undercooling degree produces cavities by dendritic growth, forming porosity; (2) In the middle cooling stage (950~1900℃), high-pressure cavities are generated between the alloy and the alumina slag layer. The cavities not only increase the risk of cracking and oxidation of the alloy ingot, but also increase the porosity of the alloy ingot; (3) In the late cooling stage (≤950℃), the alloy ingot cools too fast, causing microcracks to form inside the alloy ingot, and the exposed vanadium-aluminum alloy matrix at the cracks is oxidized to produce an oxide film.

[0004] CN110144507A provides a method for controlling the generation of oxide film on vanadium-aluminum alloy, which uses resistance wire heating to reduce the cooling rate of the alloy ingot in the later cooling stage. This method can effectively reduce the generation of oxide film on vanadium-aluminum alloy, but the temperature control range is small, the control effect is limited, and the equipment structure is complex, the energy consumption is high, and the operation is difficult.

[0005] CN103484676A provides a treatment method for an intermediate alloy after a thermal reduction reaction, which uses a steel chisel to break the slag to remove the high-pressure cavity between the alloy ingot and the slag layer. This method is difficult to operate, has a high risk factor, and has the risk of causing the alloy ingot to break.

[0006] Therefore, how to provide a method for controlling the yield of vanadium-aluminum alloy with simple operation, controllable process, high efficiency and stability is a technical problem that needs to be solved urgently by those skilled in the art. Summary of the Invention

[0007] In view of this, an object of the present invention is to provide a method for controlling the yield of vanadium-aluminum alloy.

[0008] It should be noted that the technical solution adopted by the present invention is:

[0009] In the early stage of alloy cooling (≥1900℃), water cooling is used to cool the alloy to prevent the formation of dendrites and cavities during the cooling process of the alloy liquid, so as to achieve the purpose of controlling the loosening of vanadium-aluminum alloy;

[0010] In the middle stage of alloy cooling (950-1900℃), slag removal is used to avoid the formation of high-pressure cavities between the alloy and the slag layer, thereby reducing porosity and preventing the alloy ingot from cracking and oxidation under the action of high-pressure gas.

[0011] In the later stage of alloy cooling, the cooling rate of the alloy ingot is reduced by stopping the cooling water and installing a heat-insulating furnace cover, so as to prevent the cracking and oxidation of the alloy ingot caused by excessive cooling.

[0012] In order to achieve the above object, the present invention provides the following technical solutions:

[0013] A method for controlling the yield of vanadium-aluminum alloy, comprising the following steps:

[0014] (1) Using a copper crucible and a graphite furnace as the thermite reaction vessel;

[0015] (2) mixing flaky vanadium pentoxide, aluminum particles and a slag-forming agent uniformly and adding the mixture into an aluminothermic reaction vessel;

[0016] (3) placing the reaction vessel filled with the mixed raw materials in a cooling pool with circulating water and installing a furnace cover;

[0017] (4) Ignite the magnesium strip to initiate thermite reaction. After 5 to 8 minutes of thermite reaction, remove the furnace cover and furnace body.

[0018] (5) When the alloy ingot is cooled to 950°C, stop the cooling water and install a heat preservation furnace cover on the copper crucible;

[0019] (6) Cool naturally for 24 to 48 hours, and then refine the alloy to obtain the finished vanadium-aluminum alloy product.

[0020] Optionally, the reaction vessel in step (1) of the present invention is composed of a copper crucible, a graphite furnace body and a furnace cover, wherein the graphite furnace body is an inverted cone with a larger upper portion and a smaller lower portion. The beneficial effect is that the slag layer can be taken away as a whole when the furnace body is removed.

[0021] Specifically, the schematic diagram of the production device of the present invention is as follows Figure 2 When using, first place the copper crucible in the cooling water tank, connect the copper crucible and the graphite furnace cover with bolts, add the reaction materials, install the graphite furnace cover, start the circulating cooling water, and ignite the thermite reaction; after the thermite reaction is completed, remove the graphite furnace cover and furnace body, and the inverted cone furnace body can remove the slag.

[0022] Optionally, in step (2) of the present invention, flaky vanadium pentoxide, aluminum particles and a slag-forming agent are mixed, and the mass ratio of the aluminum particles to the flaky vanadium pentoxide is (0.91-0.96):1, and the mass ratio of the mixture of the aluminum particles and the flaky vanadium pentoxide to the slag-forming agent is 1:(0.02-0.08).

[0023] Optionally, in step (3) of the present invention, the reaction vessel filled with the mixed raw materials is placed in a cooling pool with circulating water and a furnace cover is installed. This has the beneficial effect of accelerating the cooling rate of the alloy and reducing the looseness of the alloy ingot.

[0024] Optionally, when the furnace cover is removed in step (4) of the present invention, the alumina slag layer produced by the thermite reaction is taken away as a whole, which has the beneficial effect of removing the high-pressure cavity between the alloy ingot and the slag layer.

[0025] Optionally, in step (5) of the present invention, the alloy ingot is cooled to below 950° C., the cooling water is stopped, and a heat-insulating furnace cover is installed on the copper crucible. This has the beneficial effect of reducing the risk of cracking of the alloy ingot due to excessive cooling speed.

[0026] like Figure 3 The figure shows a schematic diagram of the present invention with an insulation furnace cover. The insulation furnace cover is connected to the copper crucible by bolts, which can effectively reduce the heat loss of the alloy ingot and play a role in reducing the cooling rate.

[0027] Optionally, the average cooling rate in step (7) of the present invention is 20 to 40° C. / h.

[0028] The vanadium-aluminum alloy produced by the method of the present invention mainly comprises the following components: V: 57.5-60wt%, Al: balance, Fe: ≤0.2wt%, Si: ≤0.2wt%, C: ≤0.1wt%, O: ≤0.15wt%, and N: ≤0.1wt%.

[0029] Moreover, the output of alloy ingots produced in a single furnace by the method of the present invention is 50 to 150 kg, and the average yield of vanadium-aluminum alloy produced by the method of the present invention is ≥86%.

[0030] It can be seen from the above technical solution that, compared with the prior art, the method for controlling the yield of vanadium-aluminum alloy provided by the present invention has the following excellent effects:

[0031] The vanadium-aluminum alloy produced by the above method uses water cooling to control the loosening of dendrite growth during the cooling process of the alloy. The slag is removed by combining a specially shaped reactor to prevent the formation of cavities. Later, an insulating furnace cover is installed to prevent the alloy ingot from cracking and forming an oxide film due to excessive cooling. The above three methods can effectively reduce the looseness of the alloy ingot and prevent the formation of an oxide film on the alloy ingot, ultimately increasing the average product yield from 55.8% to 70.4% to more than 86%. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0033] Figure 1 It is a process flow chart of the present invention.

[0034] Figure 2 It is a schematic diagram of the production device of the present invention.

[0035] Figure 3 This is a schematic diagram of the present invention with a heat-insulating furnace cover installed.

[0036] Figure 2 In the figure, there are a graphite furnace cover 1, a graphite furnace body 2, a copper crucible 3, and a cooling water tank 4.

[0037] Figure 3 In the furnace, there is a heat preservation furnace cover 1, a copper crucible 2, and a cooling water tank 3. DETAILED DESCRIPTION

[0038] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the embodiments of the present invention and the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0039] The embodiment of the present invention discloses a method for controlling the yield of vanadium-aluminum alloy.

[0040] For a better understanding of the present invention, the present invention is further specifically described below through the following examples, but it should not be understood as limiting the present invention. Some non-essential improvements and adjustments made by those skilled in the art based on the above invention content are also considered to fall within the scope of protection of the present invention.

[0041] The technical solution of the present invention will be further described below in conjunction with specific embodiments.

[0042] Example 1

[0043] This embodiment discloses a method for controlling the yield of vanadium-aluminum alloy, comprising the following steps:

[0044] (1) Using a copper crucible and a graphite furnace as the thermite reaction vessel;

[0045] (2) mixing flaky vanadium pentoxide, aluminum particles, and a slag-forming agent uniformly and adding the mixture to an aluminothermic reaction vessel, wherein the ratio of aluminum particles to flaky vanadium pentoxide is 0.93:1, and the ratio of slag-forming agent to the mixture of aluminum particles and flaky vanadium pentoxide is 0.06:1;

[0046] (3) placing the reaction vessel filled with the mixed raw materials in a cooling pool with circulating water and installing a furnace cover;

[0047] (4) Ignition of magnesium strips triggers thermite reaction;

[0048] (5) 5 minutes after the thermite reaction is completed, remove the furnace cover and furnace body;

[0049] (6) The alloy ingot is cooled to 950°C, the cooling water is stopped, and a heat preservation furnace cover is installed on the copper crucible;

[0050] (7) Cool naturally for 24 hours, and then refine the alloy to obtain the finished vanadium-aluminum alloy product.

[0051] The weight of alloy ingots in a single furnace of this embodiment is 52 kg. The main components of the vanadium-aluminum master alloy after finishing are: V: 58.56 wt%, Al: balance, Fe: 0.098 wt%, Si: 0.085 wt%, C: 0.01 wt%, O: 0.034 wt%, and N: 0.01 wt%.

[0052] The weight of the loose materials removed from the vanadium-aluminum alloy ingot produced in this embodiment is 1.6 kg, the weight of the alloy block with film after crushing is 4.3 kg, the weight of the finished product after finishing is 44.9 kg, and the yield rate is increased to 88.3%.

[0053] Example 2

[0054] This embodiment discloses a method for controlling the yield of vanadium-aluminum alloy, comprising the following steps:

[0055] (1) Using a copper crucible and a graphite furnace as the thermite reaction vessel;

[0056] (2) mixing flaky vanadium pentoxide, aluminum particles, and a slag-forming agent uniformly and adding the mixture to an aluminothermic reaction vessel, wherein the ratio of aluminum particles to flaky vanadium pentoxide is 0.93:1, and the ratio of slag-forming agent to the mixture of aluminum particles and flaky vanadium pentoxide is 0.06:1;

[0057] (3) placing the reaction vessel filled with the mixed raw materials in a cooling pool with circulating water and installing a furnace cover;

[0058] (4) Ignition of magnesium strips triggers thermite reaction;

[0059] (5) 6 minutes after the thermite reaction, remove the furnace cover and furnace body;

[0060] (6) The alloy ingot is cooled to 950°C, the cooling water is stopped, and a heat preservation furnace cover is installed on the copper crucible;

[0061] (7) Cool naturally for 36 hours, and then refine the alloy to obtain the finished vanadium-aluminum alloy product.

[0062] The weight of the alloy ingot in a single furnace of this embodiment is 98 kg. The main components of the vanadium-aluminum master alloy after finishing are: V: 58.64wt%, Al: balance, Fe: 0.102wt%, Si: 0.116wt%, C: 0.012wt%, O: 0.024wt%, and N: 0.012wt%.

[0063] The weight of the loose materials removed from the vanadium-aluminum alloy ingot produced in this embodiment was 2.8 kg, the weight of the alloy block with film after crushing was 7.9 kg, the weight of the finished product after finishing was 85.7 kg, and the yield rate increased to 87.4%.

[0064] Example 3

[0065] This embodiment discloses a method for controlling the yield of vanadium-aluminum alloy, comprising the following steps:

[0066] (1) Using a copper crucible and a graphite furnace as the thermite reaction vessel;

[0067] (2) mixing flaky vanadium pentoxide, aluminum particles, and a slag-forming agent uniformly and adding the mixture to an aluminothermic reaction vessel, wherein the ratio of aluminum particles to flaky vanadium pentoxide is 0.93:1, and the ratio of slag-forming agent to the mixture of aluminum particles and flaky vanadium pentoxide is 0.06:1;

[0068] (3) placing the reaction vessel filled with the mixed raw materials in a cooling pool with circulating water and installing a furnace cover;

[0069] (4) Ignition of magnesium strips triggers thermite reaction;

[0070] (5) 8 minutes after the thermite reaction is completed, remove the furnace cover and furnace body;

[0071] (6) The alloy ingot is cooled to 950°C, the cooling water is stopped, and a heat preservation furnace cover is installed on the copper crucible;

[0072] (7) Cool naturally for 48 hours, and then refine the alloy to obtain the finished vanadium-aluminum alloy product.

[0073] The weight of the alloy ingot in a single furnace of this embodiment is 149 kg. The main components of the vanadium-aluminum master alloy after finishing are: V: 58.68 wt%, Al: balance, Fe: 0.111 wt%, Si: 0.109 wt%, C: 0.014 wt%, O: 0.036 wt%, and N: 0.019 wt%.

[0074] The weight of the loose material removed from the vanadium-aluminum alloy ingot produced in this embodiment is 4.2 kg, the weight of the alloy block with film after crushing is 11.2 kg, and the weight of the finished product after finishing is 130.0 kg, and the output rate is increased to 87.2%.

[0075] Example 4

[0076] This embodiment discloses a method for controlling the yield of vanadium-aluminum alloy, comprising the following steps:

[0077] (1) Using a copper crucible and a graphite furnace as the thermite reaction vessel;

[0078] (2) mixing flaky vanadium pentoxide, aluminum particles, and a slag-forming agent uniformly and adding the mixture to an aluminothermic reaction vessel, wherein the ratio of aluminum particles to flaky vanadium pentoxide is 0.93:1, and the ratio of slag-forming agent to the mixture of aluminum particles and flaky vanadium pentoxide is 0.02:1;

[0079] (3) placing the reaction vessel filled with the mixed raw materials in a cooling pool with circulating water and installing a furnace cover;

[0080] (4) Ignition of magnesium strips triggers thermite reaction;

[0081] (5) 5 minutes after the thermite reaction is completed, remove the furnace cover and furnace body;

[0082] (6) The alloy ingot is cooled to 950°C, the cooling water is stopped, and a heat preservation furnace cover is installed on the copper crucible;

[0083] (7) Cool naturally for 24 hours, and then refine the alloy to obtain the finished vanadium-aluminum alloy product.

[0084] The weight of the alloy ingot in a single furnace of this embodiment is 51 kg. The main components of the vanadium-aluminum master alloy after finishing are: V: 58.59 wt%, Al: balance, Fe: 0.112 wt%, Si: 0.122 wt%, C: 0.011 wt%, O: 0.058 wt%, and N: 0.025 wt%.

[0085] The weight of the loose materials removed from the vanadium-aluminum alloy ingot produced in this embodiment was 1.3 kg, the weight of the alloy block with film after crushing was 3.9 kg, the weight of the finished product after finishing was 44.0 kg, and the output rate increased to 86.2%.

[0086] Example 5

[0087] This embodiment discloses a method for controlling the yield of vanadium-aluminum alloy, comprising the following steps:

[0088] (1) Using a copper crucible and a graphite furnace as the thermite reaction vessel;

[0089] (2) mixing flaky vanadium pentoxide, aluminum particles, and a slag-forming agent uniformly and adding the mixture to an aluminothermic reaction vessel, wherein the ratio of aluminum particles to flaky vanadium pentoxide is 0.93:1, and the ratio of slag-forming agent to the mixture of aluminum particles and flaky vanadium pentoxide is 0.08:1;

[0090] (3) placing the reaction vessel filled with the mixed raw materials in a cooling pool with circulating water and installing a furnace cover;

[0091] (4) Ignition of magnesium strips triggers thermite reaction;

[0092] (5) 5 minutes after the thermite reaction is completed, remove the furnace cover and furnace body;

[0093] (6) The alloy ingot is cooled to 950°C, the cooling water is stopped, and a heat preservation furnace cover is installed on the copper crucible;

[0094] (7) Cool naturally for 24 hours, and then refine the alloy to obtain the finished vanadium-aluminum alloy product.

[0095] The weight of the alloy ingot in a single furnace of this embodiment is 48 kg. The main components of the vanadium-aluminum master alloy after finishing are: V: 58.46 wt%, Al: balance, Fe: 0.085 wt%, Si: 0.118 wt%, C: 0.017 wt%, O: 0.027 wt%, and N: 0.01 wt%.

[0096] The weight of the loose materials removed from the vanadium-aluminum alloy ingot produced in this embodiment is 1.5 kg, the weight of the alloy block with film after crushing is 4.9 kg, the weight of the finished product after finishing is 41.7 kg, and the output rate is increased to 86.8%.

[0097] Example 6

[0098] This embodiment discloses a method for controlling the yield of vanadium-aluminum alloy, comprising the following steps:

[0099] (1) Using a copper crucible and a graphite furnace as the thermite reaction vessel;

[0100] (2) mixing flaky vanadium pentoxide, aluminum particles, and a slag-forming agent uniformly and adding the mixture to an aluminothermic reaction vessel, wherein the ratio of aluminum particles to flaky vanadium pentoxide is 0.91:1, and the ratio of slag-forming agent to the mixture of aluminum particles and flaky vanadium pentoxide is 0.06:1;

[0101] (3) placing the reaction vessel filled with the mixed raw materials in a cooling pool with circulating water and installing a furnace cover;

[0102] (4) Ignition of magnesium strips triggers thermite reaction;

[0103] (5) 5 minutes after the thermite reaction is completed, remove the furnace cover and furnace body;

[0104] (6) The alloy ingot is cooled to 950°C, the cooling water is stopped, and a heat preservation furnace cover is installed on the copper crucible;

[0105] (7) Cool naturally for 24 hours, and then refine the alloy to obtain the finished vanadium-aluminum alloy product.

[0106] The weight of the alloy ingot in a single furnace of this embodiment is 49 kg. The main components of the vanadium-aluminum master alloy after finishing are: V: 58.09 wt%, Al: balance, Fe: 0.121 wt%, Si: 0.098 wt%, C: 0.014 wt%, O: 0.031 wt%, and N: 0.01 wt%.

[0107] The weight of the loose materials removed from the vanadium-aluminum alloy ingot produced in this embodiment is 1.2 kg, the weight of the alloy block with film after crushing is 3.6 kg, the weight of the finished product after finishing is 43.2 kg, and the output rate is increased to 88.1%.

[0108] Example 7

[0109] This embodiment discloses a method for controlling the yield of vanadium-aluminum alloy, comprising the following steps:

[0110] (1) Using a copper crucible and a graphite furnace as the thermite reaction vessel;

[0111] (2) mixing flaky vanadium pentoxide, aluminum particles, and a slag-forming agent uniformly and adding the mixture to an aluminothermic reaction vessel, wherein the ratio of aluminum particles to flaky vanadium pentoxide is 0.96:1, and the ratio of slag-forming agent to the mixture of aluminum particles and flaky vanadium pentoxide is 0.06:1;

[0112] (3) placing the reaction vessel filled with the mixed raw materials in a cooling pool with circulating water and installing a furnace cover;

[0113] (4) Ignition of magnesium strips triggers thermite reaction;

[0114] (5) 5 minutes after the thermite reaction is completed, remove the furnace cover and furnace body;

[0115] (6) The alloy ingot is cooled to 950°C, the cooling water is stopped, and a heat preservation furnace cover is installed on the copper crucible;

[0116] (7) Cool naturally for 24 hours, and then refine the alloy to obtain the finished vanadium-aluminum alloy product.

[0117] The weight of the alloy ingot in a single furnace of this embodiment is 51 kg. The main components of the vanadium-aluminum master alloy after finishing are: V: 58.82 wt%, Al: balance, Fe: 0.091 wt%, Si: 0.105 wt%, C: 0.021 wt%, O: 0.027 wt%, and N: 0.01 wt%.

[0118] The weight of the loose materials removed from the vanadium-aluminum alloy ingot produced in this embodiment is 1.1 kg, the weight of the alloy block with film after crushing is 5.8 kg, the weight of the finished product after finishing is 44.6 kg, and the output rate is increased to 87.5%.

[0119] In summary, by comparing Examples 1 to 3, it can be seen that for different ingot weights, this method can increase the alloy yield to more than 87.2%. As the ingot weight increases, the heat dissipation of the alloy slows down, and the alloy ingot is less likely to crack during the later cooling process, which can effectively improve the alloy yield.

[0120] Comparison of Examples 1, 4, and 5 shows that for alloys with different slag-forming agent addition amounts, this method can increase the alloy yield to over 86.2%. The slag-forming agent can reduce the slag-liquid viscosity, promote the separation of the alloy and the slag, reduce alloy slag inclusions, and increase the alloy yield.

[0121] By comparing Examples 1, 6, and 7, it can be seen that for alloys with different raw material ratios, this method can increase the alloy yield to above 87.5%. Among them, a low vanadium content not only reduces the viscosity of the alloy, but also reduces the amount of slag inclusions in the alloy. On the other hand, a high vanadium content increases the alloy hardness and is less likely to crack in the later stage. Adjusting the appropriate vanadium content can effectively improve the alloy yield.

[0122] The above examples show that the method of the present invention can effectively improve the yield of alloys with different ingot weights, slagging agent addition amounts and raw material ratios.

[0123] Furthermore, the method of the present invention can effectively control the generation of porosity and oxide film in vanadium-aluminum alloy ingots, and the yield of vanadium-aluminum alloy is increased to more than 86%.

[0124] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for controlling the yield of vanadium aluminum alloy, characterized in that: The specific steps are as follows: (1) Using a copper crucible and a graphite furnace as the thermite reaction vessel; The reaction vessel is composed of a copper crucible, a graphite furnace body and a furnace cover, wherein the graphite furnace body is in an inverted cone shape with a larger upper portion and a smaller lower portion; (2) mixing flaky vanadium pentoxide, aluminum particles and a slag-forming agent uniformly and adding the mixture into an aluminothermic reaction vessel; (3) placing the reaction vessel filled with the mixed raw materials in a cooling pool with circulating water and installing a furnace cover; (4) Ignite the magnesium rod to initiate the thermite reaction. After 5-8 minutes after the thermite reaction ends, remove the furnace cover and graphite furnace body. When removing the graphite furnace body, take away the slag layer as a whole. (5) When the alloy ingot is cooled to 950°C, stop the cooling water and install a heat preservation furnace cover on the copper crucible; (6) cooling naturally for 24 to 48 hours, and finishing the alloy after cooling to obtain a vanadium aluminum alloy product; In the step, at the initial stage of alloy cooling, the temperature is ≥1900°C, and the alloy is cooled by water to prevent the formation of dendrites and cavities during the cooling process of the alloy liquid, thereby achieving the purpose of controlling the loosening of the vanadium-aluminum alloy; In the middle stage of alloy cooling, the temperature is 950~1900℃, and slag removal is used to avoid the formation of high-pressure cavities between the alloy and the slag layer, thereby reducing porosity and preventing the alloy ingot from cracking and oxidation under the action of high-pressure gas. In the later stage of alloy cooling, the cooling rate of the alloy ingot is reduced by stopping the cooling water and installing a heat-insulating furnace cover, so as to prevent the cracking and oxidation of the alloy ingot caused by excessive cooling.

2. The method for controlling the yield of vanadium aluminum alloy according to claim 1, characterized in that: In step (2), the mass ratio of the aluminum particles to the flaky vanadium pentoxide is 0.91-0.96:1, and the mass ratio of the mixture of the aluminum particles and the flaky vanadium pentoxide to the slag-forming agent is 1:0.02-0.

08.

3. The method for controlling the yield of vanadium aluminum alloy according to claim 1, characterized in that: The average cooling rate in step (6) is 20-40°C / h.

4. A method for controlling the yield of vanadium aluminum alloy according to any one of claims 1 to 3, characterized in that: The vanadium-aluminum alloy produced by the method mainly comprises the following components: V 57.5-60 wt%, Al balance, Fe≤0.2 wt%, Si≤0.2 wt%, C≤0.1 wt%, O≤0.15 wt%, and N≤0.1 wt%.

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