Method for producing electrode flat steel by continuously replacing large square billets with ladles

Abstract

The invention relates to a method for producing electrode flat steel by continuously changing ladles of blooms, which comprises the following steps of: adding a carburant into molten steel in the tapping process of a converter, and feeding an aluminum wire for treatment to obtain molten steel after tapping of the converter; the molten steel obtained after converter tapping is subjected to LF furnace refining, aluminum shots are added for treatment, and refined molten steel is obtained; the refined molten steel is subjected to RH vacuum treatment, aluminum shots and a deoxidizing agent are added for treatment, and the molten steel subjected to vacuum treatment is obtained; and the molten steel subjected to vacuum treatment is subjected to continuous casting forming treatment and rolled, and the electrode flat steel is obtained. According to the method, the HYT2 electrode flat steel is produced through square billet continuous casting, the casting blank cutting link can be omitted, the machining cost is reduced, the casting blank end face quality problem caused by cutting is avoided, and wide popularization value is achieved.

Description

Technical Field

[0001] The invention belongs to the field of metallurgical steelmaking technology, and relates to converter smelting, refining control, and continuous casting control methods, and more specifically, to a method for producing electrode flat steel by continuously changing packages of large square billets. Background Art

[0002] Due to its unique chemical composition requirements (Si content does not exceed 0.015%, Mn content does not exceed 0.03%), HYT2 electrode flat steel faces a series of challenges in the production process, especially in the continuous casting process. This extremely low content of alloying elements makes the melt fluidity of HYT2 steel poor, that is, the continuous casting castability is poor, which directly affects the stability and continuity of the continuous casting process. Although the billet continuous casting technology performs well in the production of certain steel products, it is difficult to ensure efficient and continuous operation in the production of HYT2 electrode flat steel. Due to the fluidity problem of the melt, production failures such as breakage and blockage are prone to occur during the continuous casting of billets, resulting in a significant reduction in the number of continuous casting furnaces, which seriously affects production efficiency and cost control.

[0003] In order to cope with this problem, the domestic market generally adopts the production strategy of large-section slab continuous casting. Although this method can solve the fluidity problem in the continuous casting process to a certain extent, the subsequent cutting process has become a new challenge. In order to obtain the required size of HYT2 electrode flat steel, these large-section slabs need to be cut by precision cutting machines. However, this process not only has large cutting losses, which increases the cost of raw materials, but also the quality of the cut end face is difficult to be effectively guaranteed. Large cutting losses mean more raw materials are wasted, and the instability of the quality of the cut end face may affect the overall performance and final application effect of the HYT2 electrode flat steel.

[0004] Therefore, how to improve the continuous casting castability, reduce cutting loss, and improve the quality of the cut end face while ensuring the special composition of HYT2 electrode flat steel has become a technical problem that needs to be solved urgently. Summary of the invention

[0005] The object of the present invention is to provide a method for producing electrode flat steel by continuously changing packages of large square blooms (casting machine cross-section 320mm*410mm, 360mm*450mm).

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions, which are specifically described as follows: According to aspects of the present invention, there is provided a method for producing electrode flat steel by continuous billet exchange of large square billets, comprising the following steps: 1) Adding a carburizer to the molten steel in the converter tapping process, and feeding an aluminum wire for treatment to obtain the molten steel after the converter tapping; 2) The molten steel after tapping the converter is subjected to LF furnace refining and aluminum shot treatment to obtain refined molten steel; 3) The refined molten steel is subjected to RH vacuum treatment, and aluminum shots and deoxidizer are added to obtain vacuum treated molten steel; 4) The vacuum treated molten steel is continuously cast and rolled to obtain electrode flat steel.

[0007] In one embodiment of the present invention, the electrode flat steel comprises HYT2 electrode flat steel.

[0008] In one embodiment of the present invention, in step 1), 0 kg<the added amount of the recarburizer≤50 kg.

[0009] In one embodiment of the present invention, in step 1), the oxygen activity of the small platform after the converter is controlled to be 400-500 ppm by feeding the aluminum wire with constant oxygen.

[0010] In one embodiment of the present invention, in step 2), aluminum shots are added to control the oxygen activity of the LF furnace outlet to be 350-400 ppm.

[0011] In one embodiment of the present invention, in step 3), aluminum shots are added according to the oxygen activity after vacuum carbon deoxidation (VCD).

[0012] In one embodiment of the present invention, in step 3), aluminum shots are added to control the outbound oxygen activity to be 10-15 ppm.

[0013] In one embodiment of the present invention, in step 3), the oxygen activity of the medium package is ≤30 ppm after adding the deoxidizer.

[0014] In one embodiment of the present invention, in step 3), the deoxidizer is a special deoxidizer for HYT2 electrode flat steel.

[0015] In one embodiment of the present invention, in step 4), a special invasive nozzle for HYT2 electrode flat steel is used for casting.

[0016] By adopting the above technical solution, the present invention has the following advantages compared with the prior art: Compared with the slab process, the square billet continuous casting adopted in the present invention to produce HYT2 electrode flat steel can omit the billet cutting step, reduce processing costs, avoid the billet end surface quality problems caused by cutting, and has a wide promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present invention will be more obvious and easily understood in the description of the embodiments in conjunction with the accompanying drawings, in which: Figure 1The present invention shows a schematic flow chart of a method for producing electrode flat steel by continuously changing packages of large square billets. DETAILED DESCRIPTION

[0018] It should be understood that the embodiments of the present invention shown in the exemplary embodiments are only illustrative. Although only a few embodiments are described in detail in the present invention, it is easy for those skilled in the art to appreciate that multiple modifications are feasible without actually departing from the teaching of the subject matter of the present invention. Accordingly, all such modifications should be included within the scope of the present invention. Without departing from the gist of the present invention, other replacements, modifications, changes and deletions may be made to the design, operating conditions and parameters of the following exemplary embodiments.

[0019] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the embodiments of the present invention are further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0020] like Figure 1 As shown, the present invention provides a method for producing electrode flat steel by continuous billet replacement, comprising the following steps: S101: adding a carburizer to the molten steel in the converter tapping process, and feeding an aluminum wire for treatment to obtain molten steel after converter tapping; S102: refining the molten steel after the converter is tapped by the LF furnace, and adding aluminum shots to obtain refined molten steel; S103: performing RH vacuum treatment on the refined molten steel, and adding aluminum shots and a deoxidizer to obtain vacuum-treated molten steel; S104: The vacuum treated molten steel is continuously cast and rolled to obtain electrode flat steel.

[0021] Through the above technical scheme of the present invention, compared with the slab process, the square billet continuous casting is used to produce HYT2 electrode flat steel, which can omit the billet cutting step, reduce processing costs, avoid the billet end surface quality problems caused by cutting, and has a wide promotion value.

[0022] In the method for producing electrode flat steel by continuous billet replacement of large square blooms provided by the present invention, the electrode flat steel includes HYT2 electrode flat steel.

[0023] In the method for producing electrode flat steel by continuous billet replacement provided by the present invention, in step S101, 0kg<the amount of carburizer added≤50kg.

[0024] In the method for producing electrode flat steel by continuous billet replacement provided by the present invention, in step S101, the oxygen activity of the small platform is controlled to be 400-500 ppm by feeding aluminum wire.

[0025] In the method for producing electrode flat steel by continuous billet replacement provided by the present invention, in step S102, aluminum shots are added to control the oxygen activity at the outlet to be 350-400 ppm.

[0026] In the method for producing electrode flat steel by continuous billet changing provided by the present invention, in step S103, aluminum shots are added according to the oxygen activity after vacuum carbon deoxidation (VCD).

[0027] In the method for producing electrode flat steel by continuous billet replacement provided by the present invention, in step S103, aluminum shots are added to control the oxygen activity at the outlet to be 10-15 ppm.

[0028] In the method for producing electrode flat steel by continuous bag changing of large square blooms provided by the present invention, in step S103, the oxygen activity of the middle bag after adding a deoxidizer is ≤30ppm.

[0029] In the method for producing electrode flat steel by continuous billet replacement provided by the present invention, in step S103, the deoxidizer is a special deoxidizer for HYT2 electrode flat steel.

[0030] In the method for producing electrode flat steel by continuous billet replacement provided by the present invention, in step S104, a HYT2 electrode flat steel special invasive nozzle is used for casting.

[0031] The above technical solution of the present invention is described in detail below through specific embodiments.

[0032] The embodiment of the present invention discloses a process control technology for producing HYT2 electrode flat steel by continuous package change of large square billets, and the specific method steps are as follows: (1) Adding 0-50 kg of carburizer to the molten steel in the converter tapping process, and feeding aluminum wire to control the oxygen activity of the small platform at 400-500 ppm, to obtain molten steel after converter tapping; (2) The molten steel after the converter is refining in the LF furnace, and aluminum shots are added in the LF process to control the oxygen activity at the outlet to 350-400ppm to obtain refined molten steel; (3) The refined molten steel is subjected to RH vacuum treatment. In the RH process, aluminum shots are added according to the oxygen activity after vacuum carbon deoxidation (VCD), and the oxygen activity at the outlet is controlled at 10-15ppm. HYT2 special deoxidizer is added to slow down the oxygen return of the ladle slag to the molten steel during the casting process. The oxygen activity of the middle ladle is ≤30ppm, and the molten steel after vacuum treatment is obtained; (4) The molten steel after vacuum treatment is continuously cast and rolled, the slag line adjustment of the intrusive nozzle during the casting process is optimized, and the HYT2 special intrusive nozzle is used for casting to obtain HYT2 electrode flat steel.

[0033] Example 1 A method for producing electrode flat steel by continuously changing large square billets, the specific process is as follows: 50kg of recarburizer is added to the molten steel in the process of converter tapping, the oxygen is determined on the small platform and aluminum wire is fed to control the oxygen activity of the small platform at 400ppm to obtain the molten steel after converter tapping; the molten steel after converter tapping is subjected to LF furnace refining, and aluminum shots are added in the LF process to control the oxygen activity of the outlet to 350ppm to obtain the refined molten steel; the refined molten steel is subjected to RH vacuum treatment, and aluminum shots are added in the RH process according to the oxygen activity after vacuum carbon deoxidation (VCD) to control the oxygen activity of the outlet to 10ppm, and 60kg of HYT2 special deoxidizer is added to slow down the oxygen return of the large ladle slag to the molten steel during the casting process, and the oxygen activity of the middle ladle is 30ppm to obtain the vacuum-treated molten steel; the vacuum-treated molten steel is subjected to continuous casting, forming and rolling, the slag line adjustment of the intrusive nozzle during the casting process is optimized, and the HYT2 special intrusive nozzle is used for casting to obtain the HYT2 electrode flat steel.

[0034] Example 2 A method for producing electrode flat steel by continuously changing large square billets, the specific process is as follows: 10kg of recarburizer was added to the molten steel in the converter tapping process, the oxygen was determined on the small platform and aluminum wire was fed to control the oxygen activity of the small platform at 450ppm to obtain the molten steel after converter tapping; the molten steel after converter tapping was subjected to LF furnace refining, and aluminum shots were added in the LF process to control the oxygen activity of the outlet to 360ppm to obtain the refined molten steel; the refined molten steel was subjected to RH vacuum treatment, and aluminum shots were added in the RH process according to the oxygen activity after vacuum carbon deoxidation (VCD) to control the oxygen activity of the outlet to 12ppm, and 60kg of HYT2 special deoxidizer was added to slow down the oxygen return of the large ladle slag to the molten steel during the casting process, and the oxygen activity of the middle ladle was 20ppm to obtain the vacuum-treated molten steel; the vacuum-treated molten steel was subjected to continuous casting, molding and rolling, the slag line adjustment of the intrusive nozzle during the casting process was optimized, and the HYT2 special intrusive nozzle was used for casting to obtain the HYT2 electrode flat steel.

[0035] Example 3 A method for producing electrode flat steel by continuously changing large square billets, the specific process is as follows: 50kg of recarburizer was added to the molten steel in the converter tapping process, the oxygen was determined on the small platform and aluminum wire was fed to control the oxygen activity of the small platform at 500ppm to obtain the molten steel after converter tapping; the molten steel after converter tapping was subjected to LF furnace refining, and aluminum shots were added in the LF process to control the oxygen activity of the outlet to 400ppm to obtain the refined molten steel; the refined molten steel was subjected to RH vacuum treatment, and aluminum shots were added in the RH process according to the oxygen activity after vacuum carbon deoxidation (VCD) to control the oxygen activity of the outlet to 15ppm, and 60kg of HYT2 special deoxidizer was added to slow down the oxygen return of the large ladle slag to the molten steel during the casting process, and the oxygen activity of the middle ladle was 10ppm to obtain the vacuum-treated molten steel; the vacuum-treated molten steel was subjected to continuous casting, molding and rolling, the slag line adjustment of the intrusive nozzle during the casting process was optimized, and the HYT2 special intrusive nozzle was used for casting to obtain the HYT2 electrode flat steel.

[0036] Example 4 A method for producing electrode flat steel by continuously changing large square billets, the specific process is as follows: 40kg of recarburizer was added to the molten steel in the converter tapping process, the oxygen was determined on the small platform and aluminum wire was fed to control the oxygen activity of the small platform at 455ppm to obtain the molten steel after converter tapping; the molten steel after converter tapping was subjected to LF furnace refining, and aluminum shots were added in the LF process to control the oxygen activity of the outlet to 368ppm to obtain the refined molten steel; the refined molten steel was subjected to RH vacuum treatment, and aluminum shots were added in the RH process according to the oxygen activity after vacuum carbon deoxidation (VCD) to control the oxygen activity of the outlet to 12ppm, and 60kg of HYT2 special deoxidizer was added to slow down the oxygen return of the large ladle slag to the molten steel during the casting process, and the oxygen activity of the middle ladle was 20ppm to obtain the vacuum-treated molten steel; the vacuum-treated molten steel was subjected to continuous casting, molding and rolling, the slag line adjustment of the intrusive nozzle during the casting process was optimized, and the HYT2 special intrusive nozzle was used for casting to obtain the HYT2 electrode flat steel.

[0037] Example 5 A method for producing electrode flat steel by continuously changing large square billets, the specific process is as follows: 30kg of recarburizer was added to the molten steel in the converter tapping process, the oxygen was determined on the small platform and aluminum wire was fed to control the oxygen activity of the small platform at 450ppm to obtain the molten steel after converter tapping; the molten steel after converter tapping was subjected to LF furnace refining, and aluminum shots were added in the LF process to control the oxygen activity of the outlet to 380ppm to obtain the refined molten steel; the refined molten steel was subjected to RH vacuum treatment, and aluminum shots were added in the RH process according to the oxygen activity after vacuum carbon deoxidation (VCD) to control the oxygen activity of the outlet to 13ppm, and 60kg of HYT2 special deoxidizer was added to slow down the oxygen return of the large ladle slag to the molten steel during the casting process, and the oxygen activity of the middle ladle was 15ppm to obtain the vacuum-treated molten steel; the vacuum-treated molten steel was subjected to continuous casting, molding and rolling, the slag line adjustment of the intrusive nozzle during the casting process was optimized, and the HYT2 special intrusive nozzle was used for casting to obtain the HYT2 electrode flat steel.

[0038] Example 6 A method for producing electrode flat steel by continuously changing large square billets, the specific process is as follows: 25kg of recarburizer was added to the molten steel in the converter tapping process, the oxygen was determined on the small platform and aluminum wire was fed to control the oxygen activity of the small platform at 440ppm to obtain the molten steel after converter tapping; the molten steel after converter tapping was subjected to LF furnace refining, and aluminum shots were added in the LF process to control the oxygen activity of the outlet to 355ppm to obtain the refined molten steel; the refined molten steel was subjected to RH vacuum treatment, and aluminum shots were added in the RH process according to the oxygen activity after vacuum carbon deoxidation (VCD) to control the oxygen activity of the outlet to 12ppm, and 60kg of HYT2 special deoxidizer was added to slow down the oxygen return of the large ladle slag to the molten steel during the casting process, and the oxygen activity of the middle ladle was 21ppm to obtain the vacuum-treated molten steel; the vacuum-treated molten steel was subjected to continuous casting, molding and rolling, the slag line adjustment of the intrusive nozzle during the casting process was optimized, and the HYT2 special intrusive nozzle was used for casting to obtain the HYT2 electrode flat steel.

[0039] Example 7 A method for producing electrode flat steel by continuously changing large square billets, the specific process is as follows: 20kg of recarburizer was added to the molten steel in the process of converter tapping, and the oxygen was determined on the small platform and aluminum wire was fed to control the oxygen activity of the small platform at 455ppm to obtain the molten steel after converter tapping; the molten steel after converter tapping was subjected to LF furnace refining, and aluminum shots were added in the LF process to control the oxygen activity of the outlet to 365ppm to obtain the refined molten steel; the refined molten steel was subjected to RH vacuum treatment, and aluminum shots were added in the RH process according to the oxygen activity after vacuum carbon deoxidation (VCD) to control the oxygen activity of the outlet to 13ppm, and 60kg of HYT2 special deoxidizer was added to slow down the oxygen return of the large ladle slag to the molten steel during the casting process, and the oxygen activity of the middle ladle was 20ppm to obtain the vacuum-treated molten steel; the vacuum-treated molten steel was subjected to continuous casting, molding and rolling, the slag line adjustment of the intrusive nozzle during the casting process was optimized, and the HYT2 special intrusive nozzle was used for casting to obtain the HYT2 electrode flat steel.

[0040] Example 8 A method for producing electrode flat steel by continuously changing large square billets, the specific process is as follows: 40kg of recarburizer was added to the molten steel in the process of converter tapping, and the oxygen was determined on the small platform and aluminum wire was fed to control the oxygen activity of the small platform at 465ppm to obtain the molten steel after converter tapping; the molten steel after converter tapping was subjected to LF furnace refining, and aluminum shots were added in the LF process to control the oxygen activity of the outlet to 360ppm to obtain the refined molten steel; the refined molten steel was subjected to RH vacuum treatment, and aluminum shots were added in the RH process according to the oxygen activity after vacuum carbon deoxidation (VCD) to control the oxygen activity of the outlet to 15ppm, and 60kg of HYT2 special deoxidizer was added to slow down the oxygen return of the large ladle slag to the molten steel during the casting process, and the oxygen activity of the middle ladle was 24ppm to obtain the vacuum-treated molten steel; the vacuum-treated molten steel was subjected to continuous casting, forming and rolling, the slag line adjustment of the intrusive nozzle during the casting process was optimized, and the HYT2 special intrusive nozzle was used for casting to obtain the HYT2 electrode flat steel.

[0041] Example 9 A method for producing electrode flat steel by continuously changing large square billets, the specific process is as follows: 15kg of recarburizer was added to the molten steel in the converter tapping process, the oxygen was determined on the small platform and aluminum wire was fed to control the oxygen activity of the small platform at 435ppm to obtain the molten steel after converter tapping; the molten steel after converter tapping was subjected to LF furnace refining, and aluminum shots were added in the LF process to control the oxygen activity of the outlet to 355ppm to obtain the refined molten steel; the refined molten steel was subjected to RH vacuum treatment, and aluminum shots were added in the RH process according to the oxygen activity after vacuum carbon deoxidation (VCD) to control the oxygen activity of the outlet to 14ppm, and 60kg of HYT2 special deoxidizer was added to slow down the oxygen return of the large ladle slag to the molten steel during the casting process, and the oxygen activity of the middle ladle was 22ppm to obtain the vacuum-treated molten steel; the vacuum-treated molten steel was subjected to continuous casting, molding and rolling, the slag line adjustment of the intrusive nozzle during the casting process was optimized, and the HYT2 special intrusive nozzle was used for casting to obtain the HYT2 electrode flat steel.

[0042] Example 10 A method for producing electrode flat steel by continuously changing large square billets, the specific process is as follows: 10kg of recarburizer was added to the molten steel in the converter tapping process, the oxygen was determined on the small platform and aluminum wire was fed to control the oxygen activity of the small platform at 480ppm to obtain the molten steel after converter tapping; the molten steel after converter tapping was subjected to LF furnace refining, and aluminum shots were added in the LF process to control the oxygen activity of the outlet to 357ppm to obtain the refined molten steel; the refined molten steel was subjected to RH vacuum treatment, and aluminum shots were added in the RH process according to the oxygen activity after vacuum carbon deoxidation (VCD) to control the oxygen activity of the outlet to 14ppm, and 60kg of HYT2 special deoxidizer was added to slow down the oxygen return of the large ladle slag to the molten steel during the casting process, and the oxygen activity of the middle ladle was 18ppm to obtain the vacuum-treated molten steel; the vacuum-treated molten steel was subjected to continuous casting, molding and rolling, the slag line adjustment of the intrusive nozzle during the casting process was optimized, and the HYT2 special intrusive nozzle was used for casting to obtain the HYT2 electrode flat steel.

[0043] The above-mentioned Examples 1-10 were repeated, and more than 70 furnaces of HYT2 were continuously produced. The oxygen activity of the small platform was stably controlled at 400-500ppm, with an average of 453ppm; the oxygen activity of the LF outlet was stably controlled at 350-400ppm, with an average of 365ppm; the oxygen activity of the RH outlet was stably controlled at 10-15ppm, with an average of 13ppm; the oxygen activity of the middle package was ≤30ppm, with an average of 20ppm.

[0044] The above method was used to produce more than 70 batches of HYT2 billets in continuous package change. The casting process was stable and no abnormal phenomena such as nozzle blockage occurred.

[0045] In summary, through the above-mentioned technical scheme of the present invention, compared with the slab process, the square billet continuous casting is used to produce HYT2 electrode flat steel, which can omit the billet cutting step, reduce processing costs, and avoid the billet end face quality problems caused by cutting, and has a wide promotion value.

[0046] It should be particularly pointed out that the various components or steps in the above-mentioned embodiments can be cross-linked, replaced, added, or deleted with each other. Therefore, the combinations formed by these reasonable arrangements and combinations should also fall within the scope of protection of the present invention, and the scope of protection of the present invention should not be limited to the embodiments.

[0047] The above are exemplary embodiments disclosed in the present invention. The order disclosed in the above embodiments of the present invention is for description only and does not represent the advantages and disadvantages of the embodiments. However, it should be noted that the discussion of any of the above embodiments is only exemplary and is not intended to imply that the scope disclosed in the embodiments of the present invention (including the claims) is limited to these examples. Various changes and modifications may be made without departing from the scope defined in the claims. The functions, steps and / or actions of the method claims according to the disclosed embodiments described herein do not need to be performed in any particular order. In addition, although the elements disclosed in the embodiments of the present invention may be described or required in individual form, they may also be understood as multiple unless explicitly limited to the singular.

[0048] A person skilled in the art should understand that the discussion of any of the above embodiments is only exemplary and is not intended to imply that the scope of the disclosure of the embodiments of the present invention (including the claims) is limited to these examples; under the concept of the embodiments of the present invention, the technical features in the above embodiments or different embodiments can also be combined, and there are many other changes in different aspects of the embodiments of the present invention as described above, which are not provided in detail for the sake of simplicity. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present invention should be included in the protection scope of the embodiments of the present invention.

Claims

1. A method for producing electrode flat steel by continuous bloom bag changing, characterized in that: The following steps are involved: 1) Adding a carburizer to the molten steel in the converter tapping process, and feeding an aluminum wire for treatment to obtain the molten steel after the converter tapping; 2) The molten steel after tapping the converter is subjected to LF furnace refining and aluminum shot treatment to obtain refined molten steel; 3) The refined molten steel is subjected to RH vacuum treatment, and aluminum shots and deoxidizer are added to obtain vacuum treated molten steel; 4) The vacuum treated molten steel is continuously cast and rolled to obtain electrode flat steel.

2. The method for producing electrode flat steel by continuous bloom bag changing according to claim 1, characterized in that: The electrode flat steel comprises HYT2 electrode flat steel.

3. The method for producing electrode flat steel by continuous bloom bag changing according to claim 1, characterized in that: In step 1), 0 kg<the added amount of the recarburizer≤50 kg.

4. The method for producing electrode flat steel by continuous bloom bag changing according to claim 1, characterized in that: In step 1), the oxygen activity of the small platform after the converter is controlled at 400-500ppm by feeding the aluminum wire with constant oxygen.

5. The method for producing electrode flat steel by continuous bloom bag changing according to claim 1, characterized in that: In step 2), aluminum pellets are added to control the oxygen activity at the exit of the LF furnace to 350-400ppm.

6. The method for producing electrode flat steel by continuous bloom bag changing according to claim 1, characterized in that: In step 3), aluminum shots are added according to the oxygen activity after vacuum carbon deoxidation (VCD).

7. The method for producing electrode flat steel by continuous bloom bag changing according to claim 1, characterized in that: In step 3), aluminum shots are added to control the outbound oxygen activity at 10-15 ppm.

8. The method for producing electrode flat steel by continuous bloom bag changing according to claim 1, characterized in that: In step 3), after adding the deoxidizer, the oxygen activity of the middle package is ≤30ppm.

9. The method for producing electrode flat steel by continuous bloom bag changing according to claim 2, characterized in that: In step 3), the deoxidizer is a special deoxidizer for HYT2 electrode flat steel.

10. The method for producing electrode flat steel by continuous bloom bag changing according to claim 2, characterized in that: In step 4), the HYT2 electrode flat steel special invasive nozzle is used for casting.

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