Method for reducing oxygen content in tundish by gas purging

Abstract

This invention belongs to the field of steelmaking technology, specifically disclosing a method for reducing the oxygen content in a tundish by gas purging. The method includes the following steps: S1: Before molten steel is injected into the tundish, the volume Q of the tundish is obtained. R The process involves: S1: Determining the initial oxygen content C1 in the tundish atmosphere; S2: Setting the target oxygen content C2 in the tundish atmosphere; S3: Collecting multiple historical data points on the time required for the tundish oven to be raised before casting begins, calculating the average of these historical data points, and labeling it as the operation time t; S4: Selecting the purge gas and obtaining the oxygen content C0 in the purge gas; S5: Calculating the required purge gas flow rate Q to replace the tundish; S6: Setting the number of purge pipes n and the pipe diameter d. This invention provides a method for reducing the oxygen content in a tundish through gas purging, which is used to efficiently and rapidly reduce the oxygen content in the tundish to meet the needs of clean steel production.

Description

Technical Field

[0001] This invention belongs to the field of steelmaking technology, and in particular relates to a method for reducing the oxygen content in a tundish by gas purging. Background Technology

[0002] In modern steelmaking processes, molten steel, after being smelted in a converter or electric furnace, is stored in a ladle. After secondary refining, it is hoisted to a continuous casting platform, where it is poured into a tundish. From there, the molten steel flows into a crystallizer to solidify. Before casting begins, the tundish is filled with air. When the molten steel is poured into the tundish, it inevitably comes into contact with the air, causing oxidation. The oxidation products exist in the molten steel as harmful inclusions, reducing its cleanliness. In mild cases, this can clog the nozzle, affecting the pourability of the steel; in severe cases, large particles remaining in the finished product can cause cracking during use, compromising product quality. Simultaneously, nitrogen from the air in the tundish dissolves into the molten steel, leading to nitrogen enrichment and causing a series of problems such as abnormal steel composition or performance issues. Therefore, the oxygen content in the tundish atmosphere is a crucial indicator for clean steel production.

[0003] Regarding the control of oxygen content in the tundish atmosphere, some companies purge the tundish with inert argon gas before casting. This operation is rather crude, and related research is limited. Common problems include: 1) a lack of quantitative requirements for the purge gas flow rate during production; 2) neglecting the impact of purge pipeline layout and diameter on the purging effect; and 3) insufficient sealing of the tundish itself. Given these three issues, in actual production, the oxygen content in the tundish atmosphere remains high even after gas purging, failing to achieve the desired effect. Therefore, it is urgent to achieve a low-oxygen atmosphere in the tundish efficiently and quickly through scientific methods to meet the needs of clean steel production. Summary of the Invention

[0004] The purpose of this invention is to overcome the above-mentioned problems in the prior art and provide a method for reducing the oxygen content in the tundish by gas purging, which can efficiently and quickly reduce the oxygen content in the tundish to meet the needs of clean steel production.

[0005] To achieve the above-mentioned technical objectives and effects, the present invention is implemented through the following technical solution:

[0006] A method for reducing the oxygen content in an tundish by gas purging, the method comprising the following steps:

[0007] S1: Obtain the tundish cavity volume Q before the molten steel is poured into the tundish. R The initial oxygen content C1 in the atmosphere inside the intermediate ladle was measured.

[0008] S2: Set the target value C2 for the oxygen content of the atmosphere inside the tundish;

[0009] S3: Collect multiple historical data points on the time required for the intermediate bread oven to be raised to the point before pouring begins, calculate the average of the multiple historical data points, and label it as the operation time t;

[0010] S4: Select the purge gas and obtain the oxygen content C0 in the purge gas;

[0011] S5: Calculate the required purge gas flow rate Q in the displacement intermediate package;

[0012] S6: Set the number of purging pipes n and the diameter of the purging pipes d;

[0013] S7: Calculate the purge gas velocity v and purge pipeline pressure loss Δp when the oxygen content in the intermediate bath reaches the target value C2. Change the n and d values ​​to obtain multiple sets of data for the purge gas velocity v and purge pipeline pressure loss Δp.

[0014] S8: Based on the multiple sets of purge gas flow velocity v and purge pipeline pressure loss Δp calculated in step S7, select the n value and d value when both purge gas flow velocity v and purge pipeline pressure loss Δp are at their lowest. These values ​​are the required number of purge pipelines and the diameter of the purge pipelines, and are marked as the optimal number of pipelines and the optimal pipe diameter, respectively.

[0015] S9: Based on the analysis results of step S8, when the intermediate batch oven is lifted, the purge pipe is activated to fill the intermediate batch with purge gas. The number of purge pipes is the optimal number of pipes, and the pipe diameter of the purge pipe is the optimal pipe diameter.

[0016] S10: After the time for filling the tundish with purging gas reaches the operating time t, the gas purging work is completed. The oxygen content of the atmosphere in the tundish is detected to be no greater than the target value C2 of the oxygen content of the atmosphere in the tundish. Then, the molten steel is prepared to be poured into the tundish.

[0017] Furthermore, in step S3, the specific process for calculating the time required from lifting the tundish oven to pouring the molten steel is as follows: starting from when the tundish oven finishes baking the tundish and lifts the tundish oven, the timing ends when the ladle begins pouring molten steel into the tundish. The timing result is then recorded as the time required from lifting the tundish oven to pouring the molten steel.

[0018] Furthermore, the purging gas is an inert gas.

[0019] Furthermore, the purging gas is argon.

[0020] Furthermore, in step S5, the calculation formula for the required purge gas flow rate within the tundish is as follows:

[0021]

[0022] Where Q is the required purge gas flow rate in the tundish, in m³ / s. 3 / min;

[0023] t is the operation time from when the intermediate bread oven is lifted to when pouring begins, in minutes;

[0024] Q R The intermediate containment volume is expressed in meters (m). 3 ;

[0025] C1 is the initial oxygen content of the atmosphere inside the tundish;

[0026] C2 is the target value for the oxygen content of the atmosphere inside the tundish;

[0027] C0 represents the oxygen content in the purging gas.

[0028] Furthermore, the number of purging pipes, n, is a positive integer not greater than 10, preferably 4.

[0029] Furthermore, the diameter d of the purging pipe ranges from [0.02, 0.05].

[0030] Furthermore, in step S7, the formula for calculating the purge gas flow rate v is as follows:

[0031]

[0032] Furthermore, in step S7, the formula for calculating the pressure loss Δp in the purging pipeline is as follows:

[0033]

[0034] Where λ is the drag coefficient;

[0035] l is the length of the purging pipe;

[0036] ρ is the density of the purging gas, in kg / m³. 3 ;

[0037] The formula for calculating λ is as follows:

[0038]

[0039] In the formula for calculating λ, Re is the Reynolds number, and the formula for calculating Re is as follows:

[0040]

[0041] In the formula for Re, γ is the kinematic viscosity of the gas, with units of m. 2 / s;

[0042] In the above calculation formulas, d refers to the diameter of the purging pipeline, in meters (m).

[0043] v represents the purge gas velocity, in m / s.

[0044] Compared with the prior art, the beneficial effects of the present invention are:

[0045] 1. This invention provides a method for reducing the oxygen content in a tundish by gas purging, which is used to efficiently and quickly reduce the oxygen content in the tundish to meet the needs of clean steel production.

[0046] 2. This invention, through theoretical calculations, quantitatively provides the purge gas flow rate required to reduce the oxygen content in the tundish atmosphere. It also clarifies the purge gas flow rate and pressure loss within the pipes for different numbers and diameters of purge pipes, providing scientific guidance for on-site production, thereby meeting the needs of clean steel production and improving product quality.

[0047] 3. In this invention, multiple sets of blowing pipes are set up, each with a different number of pipes and a different pipe diameter. The flow rate of the purging gas and the pressure loss of the purging pipes under different numbers and diameters are calculated. Through comparative analysis of multiple sets of data, the optimal number of pipes and pipe diameter are selected when both the purging gas flow rate v and the pressure loss Δp are minimized. This optimal number of pipes and pipe diameter are then applied to actual production. Under these optimal pipe numbers and diameters, purging gas is introduced into the tundish, ensuring that the oxygen content in the atmosphere inside the tundish does not exceed the target value C2 after the purging time, thus allowing subsequent molten steel pouring operations. This invention uses scientific calculation methods to calculate the optimal pipe data and optimal pipe diameter, providing a basis for configuring the number and diameter of pipes in actual production.

[0048] 4. In this invention, before molten steel is poured into the tundish from the ladle, purge gas is introduced into the tundish. The air in the tundish is mixed with the purge gas and then discharged, thereby reducing the oxygen content in the tundish to the target value within a certain period of time. Attached Figure Description

[0049] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0050] Figure 1 This is a flowchart of the method for reducing the oxygen content in the intermediate drum by gas purging provided by the present invention. Detailed Implementation

[0051] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0052] like Figure 1 As shown, a method for reducing the oxygen content in an tundish by gas purging includes the following steps:

[0053] S1: Obtain the intermediate bounding product Q R The initial oxygen content C1 in the atmosphere inside the intermediate ladle was measured.

[0054] Before molten steel is poured into the tundish from the ladle, obtain the tundish cavity volume Q. R The initial oxygen content C1 in the atmosphere inside the intermediate ladle was measured.

[0055] S2: Set the target value C2 for the oxygen content of the atmosphere inside the tundish;

[0056] S3: Collect multiple historical data points on the time required for the intermediate bread oven to be raised to the point before pouring begins, calculate the average of the multiple historical data points, and label it as the operation time t;

[0057] In step S3, the specific process for calculating the time required from lifting the tundish oven to pouring the molten steel is as follows: the timing starts when the tundish oven is lifted after the tundish oven finishes baking the tundish, and ends when the ladle begins pouring molten steel into the tundish. The timing result is calculated and marked as the time required from lifting the tundish oven to pouring the molten steel.

[0058] S4: Select the purge gas and obtain the oxygen content C0 in the purge gas;

[0059] In step S4, the selected purging gas is an inert gas, preferably argon;

[0060] S5: Calculate the required purge gas flow rate Q in the displacement intermediate package;

[0061] In step S5, the calculation formula for the required purge gas flow rate in the tundish is as follows:

[0062]

[0063] Where Q is the required purge gas flow rate in the tundish, in m³ / s. 3 / min;

[0064] t is the operation time from when the intermediate bread oven is lifted to when pouring begins, in minutes;

[0065] Q R The intermediate containment volume is expressed in meters (m). 3 ;

[0066] C1 is the initial oxygen content of the atmosphere inside the tundish;

[0067] C2 is the target value for the oxygen content of the atmosphere inside the tundish;

[0068] C0 represents the oxygen content in the purging gas;

[0069] Among them, the initial oxygen content C1 in the atmosphere inside the tundish, the target value of the oxygen content C2 in the atmosphere inside the tundish, and the oxygen content C0 in the purge gas are all volume fractions.

[0070] S6: Set the number of purging pipes n and the diameter of the purging pipes d;

[0071] In step S6, the number of purge pipes n is a positive integer not greater than 10, that is, the number of purge pipes set is not greater than 10, preferably 4.

[0072] The range of the diameter d of the purging pipeline is [0.02, 0.05], that is, the range of the set purging pipeline diameter is 0.02-0.05m;

[0073] S7: Calculate the purge gas velocity v and purge pipeline pressure loss Δp when the oxygen content in the intermediate bath reaches the target value C2. Change the n and d values ​​to obtain multiple sets of data for the purge gas velocity v and purge pipeline pressure loss Δp.

[0074] In step S7, the formula for calculating the purge gas flow rate v is as follows:

[0075]

[0076] In step S7, the formula for calculating the pressure loss Δp in the purging pipeline is as follows:

[0077]

[0078] In the formula for calculating Δp, λ is the drag coefficient;

[0079] l is the length of the purging pipe;

[0080] ρ is the density of the purging gas, in kg / m³. 3 ;

[0081] The formula for calculating λ is as follows:

[0082]

[0083] In the formula for calculating λ, Re is the Reynolds number, and the formula for calculating Re is as follows:

[0084]

[0085] In the formula for Re, γ is the kinematic viscosity of the gas, with units of m. 2 / s;

[0086] In the above calculation formulas, d refers to the diameter of the purging pipeline, in meters (m).

[0087] v represents the purge gas velocity, in m / s.

[0088] S8: Based on the multiple sets of purge gas flow velocity v and purge pipeline pressure loss Δp calculated in step S7, select the n value and d value when both purge gas flow velocity v and purge pipeline pressure loss Δp are at their lowest. These values ​​are the required number of purge pipelines and the diameter of the purge pipelines, and are marked as the optimal number of pipelines and the optimal pipe diameter, respectively.

[0089] S9: Based on the analysis results of step S8, when the intermediate batch oven is lifted, the purge pipe is activated to fill the intermediate batch with purge gas. The number of purge pipes is the optimal number of pipes, and the pipe diameter of the purge pipe is the optimal pipe diameter.

[0090] S10: After the time for filling the tundish with purging gas reaches the operating time t, the gas purging work is completed. The oxygen content of the atmosphere in the tundish is detected to be no greater than the target value C2 of the oxygen content of the atmosphere in the tundish. Then, the molten steel is prepared to be poured into the tundish.

[0091] The following are specific examples.

[0092] Example

[0093] This embodiment provides a method for reducing the oxygen content in an intermediate drum by gas purging, the method comprising the following steps:

[0094] S1: Obtain the tundish cavity volume Q before the molten steel is poured into the tundish. R The initial oxygen content C1 in the atmosphere inside the intermediate ladle was measured.

[0095] Among them, the measured intermediate containment volume Q R 10m 3 ;

[0096] The initial oxygen content C1 in the atmosphere inside the tundish is 21%;

[0097] S2: Set the target value C2 for the oxygen content of the atmosphere in the tundish to 1%;

[0098] S3: Collect multiple historical data on the time required for the intermediate bread oven to be lifted up before pouring begins, calculate the average of the multiple historical data, and mark it as the operation time t, where the operation time t is 4 minutes;

[0099] In step S3, the specific process for calculating the time required from lifting the tundish oven to pouring the molten steel is as follows: the timing starts when the tundish oven is lifted after the tundish oven finishes baking the tundish, and ends when the ladle begins pouring molten steel into the tundish. The timing result is calculated and marked as the time required from lifting the tundish oven to pouring the molten steel.

[0100] S4: Select the purge gas and obtain the oxygen content C0 in the purge gas. The selected purge gas is argon, and the oxygen content C0 in the purge gas is 0.

[0101] S5: Calculate the required purge gas flow rate Q in the displacement intermediate package;

[0102] In step S5, the calculation formula for the required purge gas flow rate in the tundish is as follows:

[0103]

[0104] Where Q is the required purge gas flow rate in the tundish, in m³ / s. 3 / min;

[0105] t is the operation time from when the intermediate bread oven is lifted to when pouring begins, in minutes;

[0106] Q R The intermediate containment volume is expressed in meters (m). 3 ;

[0107] C1 is the initial oxygen content of the atmosphere inside the tundish;

[0108] C2 is the target value for the oxygen content of the atmosphere inside the tundish;

[0109] C0 represents the oxygen content in the purging gas;

[0110] Substituting the data obtained in steps S1-S4 into this calculation formula, the required purge gas flow rate Q in the displacement intermediate package is found to be 7.5 m³ / s. 3 / min;

[0111] S6: Set the number of purging pipes n and the diameter of the purging pipes d;

[0112] In step S6, the number of purge pipes n is a positive integer not greater than 10, that is, the set number of purge pipes is not greater than 10.

[0113] The range of the diameter d of the purging pipeline is [0.02, 0.05], that is, the range of the set purging pipeline diameter is 0.02-0.05m;

[0114] Based on the actual production conditions and the layout of the purging pipeline, four purging pipelines are sufficient to cover the entire intermediate tundish cover. Adding more purging pipelines would affect the site layout, make construction more difficult, increase economic costs, and have little impact on improving the actual purging gas effect.

[0115] The diameter d of the purging pipeline is set because if the diameter is too small, the pressure loss will be large and the flow velocity will be very high. According to Bernoulli's equation, the pressure is low where the velocity is high, which will cause air near the pipeline to be drawn into the tundish, increasing the oxygen atmosphere in the tundish. If the diameter is too large, the gas flow velocity will be very low, and it will be difficult to achieve the purpose of purging. Therefore, the diameter range is set to 0.02-0.05m.

[0116] Select n, which means the number of purging pipes is 2, 3, and 4 respectively; select d, which means the pipe diameters of the purging pipes are 0.02m, 0.03m, 0.04m, and 0.05m respectively.

[0117] S7: Calculate the purge gas velocity v and purge pipeline pressure loss Δp when the oxygen content in the intermediate bath reaches the target value C2. Change the n and d values ​​to obtain multiple sets of data for the purge gas velocity v and purge pipeline pressure loss Δp.

[0118] In step S7, the formula for calculating the purge gas flow rate v is as follows:

[0119]

[0120] In step S7, the formula for calculating the pressure loss Δp in the purging pipeline is as follows:

[0121]

[0122] In the formula for calculating Δp, λ is the drag coefficient;

[0123] l represents the length of the purging pipe. Based on the site layout, the length l of the purging pipe is 4m.

[0124] ρ is the density of the purging gas, i.e., the density of argon, which is 1.784 kg / m³. 3 The unit is kg / m 3 ;

[0125] The formula for calculating λ is as follows:

[0126]

[0127] In the formula for calculating λ, Re is the Reynolds number, and the formula for calculating Re is as follows:

[0128]

[0129] In the formula for Re, γ is the kinematic viscosity of the gas, with units of m. 2 / s;

[0130] In the above calculation formulas, d refers to the diameter of the purging pipeline, in meters (m).

[0131] v represents the purge gas velocity, in m / s.

[0132] Based on the actual production conditions and the layout of the purging pipeline, n is selected, that is, the number of purging pipelines is 2, 3, and 4 respectively; d is selected, that is, the diameter of the purging pipelines is 0.02m, 0.03m, 0.04m, and 0.05m respectively.

[0133] Substituting the values ​​of n and d into the above calculation formula, multiple sets of data on the purge gas velocity v and the pressure loss Δp in the purge pipeline were obtained. Detailed data are shown in Table 1. That is, the required purge gas flow rate Q in the tundish is 7.5 m³ / s. 3 Gas flow rate and pressure loss under different numbers of blowing pipes and different pipe diameters at / min.

[0134] Table 1

[0135]

[0136] S8: Based on the multiple sets of purge gas flow velocity v and purge pipeline pressure loss Δp data in Table 1, select the n and d values ​​when both purge gas flow velocity v and purge pipeline pressure loss Δp are at their lowest. These values ​​represent the required number of purge pipelines and the required pipe diameter, and are marked as the optimal number of pipelines and the optimal pipe diameter, respectively.

[0137] According to the data in Table 1, when the number of air blowing pipes is 4 and the pipe diameter is 0.05m, the gas velocity is 15.9m / s and the pipe pressure loss is 393MPa. Under these conditions, the gas velocity and pipe pressure loss are the lowest, that is, the optimal number of pipes is 4 and the optimal pipe diameter is 0.05m.

[0138] S9: Based on the analysis results of step S8, when the intermediate batch oven is lifted, the purge pipe is activated to fill the intermediate batch with purge gas. The number of purge pipes is the optimal number of pipes, and the pipe diameter of the purge pipe is the optimal pipe diameter.

[0139] S10: After the purging gas in the tundish has been charged for 4 minutes, the gas purging is completed. The oxygen content in the atmosphere of the tundish is detected to be 0.98%, which is less than the target value C2, i.e., 1%, of the oxygen content in the atmosphere of the tundish. Then, it is ready to pour the molten steel into the tundish.

[0140] This invention provides a method for reducing the oxygen content in a tundish through gas purging. This method is used to efficiently and rapidly reduce the oxygen content in the tundish to meet the needs of clean steel production. Through theoretical calculations, the required flow rate of purging gas for reducing the oxygen content in the tundish atmosphere is quantitatively given. At the same time, the flow rate of purging gas and the pressure loss in the pipes are clarified under different numbers of purging pipes and different pipe diameters. This provides scientific guidance for on-site production, thereby meeting the needs of clean steel production and improving product quality.

[0141] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0142] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A method for reducing the oxygen content in an intermediate drum by gas purging, characterized in that, The method includes the following steps: S1: Obtain the tundish cavity volume Q before the molten steel is poured into the tundish. R The initial oxygen content C1 of the atmosphere inside the intermediate ladle was measured. S2: Set the target value C2 for the oxygen content of the atmosphere inside the tundish; S3: Collect multiple historical data points on the time required for the intermediate bread oven to be raised to the point before pouring begins, calculate the average of the multiple historical data points, and label it as the operation time t; S4: Select the purge gas and obtain the oxygen content C0 in the purge gas; S5: Calculate the required purge gas flow rate Q in the displacement intermediate package; S6: Set the number of purging pipes n and the diameter of the purging pipes d; S7: Calculate the purge gas velocity v and purge pipeline pressure loss ∆p when the oxygen content in the intermediate bath reaches the target value C2. Change the n and d values ​​to obtain multiple sets of data for the purge gas velocity v and purge pipeline pressure loss ∆p. S8: Based on the multiple sets of purge gas flow velocity v and purge pipeline pressure loss ∆p calculated in step S7, select the n value and d value when both purge gas flow velocity v and purge pipeline pressure loss ∆p are at their lowest. These values ​​are the required number of purge pipelines and the diameter of the purge pipelines, and are marked as the optimal number of pipelines and the optimal pipe diameter, respectively. S9: Based on the analysis results of step S8, when the intermediate batch oven is lifted, the purge pipe is activated to fill the intermediate batch with purge gas. The number of purge pipes is the optimal number of pipes, and the pipe diameter of the purge pipe is the optimal pipe diameter. S10: After the time for filling the tundish with purging gas reaches the operating time t, the gas purging work is completed. The oxygen content of the atmosphere in the tundish is detected to be no greater than the target value C2 of the oxygen content of the atmosphere in the tundish. Then, the molten steel is prepared to be poured into the tundish. In step S5, the calculation formula for the required purge gas flow rate in the tundish is as follows: ； Where Q is the required purge gas flow rate in the tundish, in m³ / s. 3 / min; t is the operation time from when the intermediate bread oven is lifted to when pouring begins, in minutes; Q R The intermediate containment volume is expressed in meters (m). 3 ; C1 is the initial oxygen content of the atmosphere inside the tundish; C2 is the target value for the oxygen content of the atmosphere inside the tundish; C0 represents the oxygen content in the purging gas; In step S7, the formula for calculating the pressure loss ∆p in the purging pipeline is as follows: ； Where λ is the drag coefficient; l is the length of the purging pipe; The density of the purging gas is expressed in kg / m³. 3 ; The formula for calculating λ is as follows: ； In the formula for calculating λ, Re is the Reynolds number, and the formula for calculating Re is as follows: ； In the formula for Re, γ is the kinematic viscosity of the gas, with units of m. 2 / s; In the above calculation formulas, d refers to the diameter of the purging pipeline, in meters (m). v represents the purge gas velocity, in m / s.

2. The method for reducing oxygen content in an intermediate drum by gas purging according to claim 1, characterized in that, In step S3, the specific process for calculating the time required from lifting the tundish oven to pouring the molten steel is as follows: the timing starts when the tundish oven is lifted after the tundish oven has finished baking the tundish, and ends when the ladle begins pouring molten steel into the tundish. The timing result is recorded as the time required from lifting the tundish oven to pouring the molten steel.

3. The method for reducing oxygen content in an intermediate drum by gas purging according to claim 1, characterized in that, The purging gas is an inert gas.

4. The method for reducing oxygen content in an intermediate drum by gas purging according to claim 1, characterized in that, The purging gas is argon.

5. The method for reducing oxygen content in an intermediate drum by gas purging according to claim 1, characterized in that, The number of purging pipes, n, is a positive integer not greater than 10.

6. The method for reducing oxygen content in an intermediate drum by gas purging according to claim 1, characterized in that, The diameter d of the purging pipeline ranges from [0.02, 0.05].

7. The method for reducing oxygen content in an intermediate drum by gas purging according to claim 1, characterized in that, In step S7, the formula for calculating the purge gas flow rate v is as follows: 。

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