Method for accurately controlling acid-soluble aluminum of oriented silicon steel

Abstract

The invention discloses a method for accurately controlling acid-soluble aluminum of oriented silicon steel. The method comprises the following steps: converter smelting: smelting according to a conventional converter smelting process; deoxidizing and alloying; feeding wires behind the converter; and RH refining furnace vacuum treatment: the molten steel is hoisted to an RH refining station for vacuum treatment. According to the invention, a method of feeding aluminum wires by using a wire feeder at the back of a converter is adopted, and temperature and component changes of molten steel are monitored in real time in the process. And the wire feeding speed is adjusted according to the monitoring result, so that various production conditions can be better adapted, the content of the acid melting aluminum is accurately controlled, the precision and stability of component control are improved, and the component fluctuation is reduced. Moreover, the method and the system are simple and convenient to operate, can easily achieve automatic control, and can practically and effectively improve the production efficiency and the product quality.

Description

Technical Field

[0001] The invention belongs to the technical field of steelmaking, and in particular relates to a method for accurately controlling acid-dissolved aluminum in oriented silicon steel. Background Art

[0002] Oriented silicon steel is an extremely low carbon silicon-iron alloy material with high magnetic permeability, low coercivity, and high resistivity. It is mainly used for high-frequency transformers, high-power magnetic amplifiers, pulse generators, general yoke coils, inductors, storage and memory elements, switches and control elements, magnetic shielding, and transformers working under vibration and radiation conditions. Compared with other materials such as ferrites and amorphous materials, it has high saturation magnetic induction and high magnetic permeability, which can make the iron core very small and has the characteristics of a wide range of applications.

[0003] In the prior art, the acid-melted aluminum content is usually adjusted by adding aluminum blocks or aluminum iron during the converter steelmaking process, but this method has the problems of low composition control accuracy and large fluctuations, and it is difficult to meet the requirements of oriented silicon steel for narrow composition control of acid-melted aluminum. The present invention can well solve the above problems. Summary of the invention

[0004] In order to solve the above technical problems, the object of the present invention is to provide a method for accurately controlling acid-dissolved aluminum in oriented silicon steel.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] The present invention provides a method for accurately controlling acid-dissolved aluminum in oriented silicon steel, comprising the following steps:

[0007] Converter smelting: According to the conventional converter smelting process, the desulfurized molten iron is added to the converter, and active lime, light-burned dolomite, and iron ball slag-making materials are added to it during the converter smelting process. The top and bottom combined blowing mode is adopted in the blowing process, and nitrogen is used as the bottom blowing gas throughout the whole process;

[0008] Deoxidation alloying: When the oxygen content at the converter end point is ≤800ppm, 200kg of aluminum-iron alloy is added during the steel-making process for pre-deoxidation, and then ferrosilicon alloy is added; when the oxygen content at the converter end point is >800ppm, 250kg of aluminum-iron alloy is added during the steel-making process for pre-deoxidation, and then ferrosilicon alloy is added;

[0009] Wire feeding after the converter: After adding ferrosilicon alloy, aluminum wire is fed into the converter using an advanced wire feeder. During the wire feeding process, argon is turned on for strong stirring, and the argon flow rate must be strictly controlled to ensure that the aluminum wire can completely enter the molten steel and achieve uniform mixing. The target aluminum content is precisely controlled according to the internal control upper limit + 0.003% to ensure that the amount of aluminum added meets the performance requirements of the product.

[0010] RH refining furnace vacuum treatment: The molten steel is hoisted to the RH refining station for vacuum treatment. During the treatment, the vacuum pump is first turned on to evacuate the furnace to reduce the pressure in the furnace. According to the initial composition and temperature of the molten steel, the amount of nitrogen blown in is controlled to fully stir the molten steel. When the vacuum degree reaches the set value, it is maintained for a period of time to promote the uniformity of the composition and temperature in the molten steel. During the vacuum treatment, according to the analysis results of the molten steel composition, aluminum particles are added to accurately adjust the acid-soluble aluminum content to the target value. After the treatment is completed, the vacuum is broken to restore the pressure in the furnace, and the molten steel is sampled and tested to ensure that the acid-soluble aluminum content meets the requirements.

[0011] Furthermore, in the converter smelting step, during endpoint control, the oxygen is 737 ppm, the temperature is 1632° C., and the steel tapping process adopts a slide plate slag blocking process.

[0012] Furthermore, after wire feeding is completed, sampling is carried out so as to detect and analyze the aluminum content in the molten steel in a timely manner, providing accurate data support for subsequent process adjustments.

[0013] Furthermore, during the steel-making process, 200 kg of aluminum-iron alloy was added for pre-deoxidation, and then 11 tons of ferrosilicon alloy was added in batches. The molten steel was then transported to the wire feeder behind the furnace for temperature measurement and oxygen determination. The temperature was 1613°C and the oxygen was 10.3 ppm.

[0014] Furthermore, a wire feeder is used to feed 150 meters of aluminum wire behind the converter. During the wire feeding process, argon gas is turned on for 150 meters. 3 / h for strong stirring to ensure that the aluminum wire can completely enter the molten steel and achieve uniform mixing.

[0015] Furthermore, the initial temperature of the molten steel was 1603°C, and the nitrogen injection rate was controlled to be 180m 3 / h, fully stir the molten steel. When the vacuum reaches 0.1mbar, maintain it for 10min to promote uniform composition and temperature in the molten steel. During the treatment process, according to the result of acid-soluble aluminum in the molten steel after wire feeding, which is 0.0285%, aluminum particles are added to accurately adjust the acid-soluble aluminum content to 0.031%. After the treatment, the molten steel is transported to the casting machine for pouring;

[0016] Through the above control, the acid-soluble aluminum content of the end-point component of oriented silicon steel is 0.0290%, which meets the requirements of the steel grade.

[0017] Further, it specifically includes:

[0018] Converter smelting: According to the conventional converter smelting process, the desulfurized molten iron is added to the converter and high-quality self-produced scrap steel is added, with a total loading amount of 305 tons; during the converter smelting process, active lime, light-burned dolomite, iron balls and other slag-making materials are added, and nitrogen is blown at the bottom during the blowing process; the oxygen content at the carbon drawing end point is 754ppm, the carbon drawing temperature is 1637℃, and a slide plate is used to block the slag during the steelmaking process;

[0019] Deoxidation and alloying: Since the oxygen content at the converter end point is ≤800ppm, 200kg of micro-carbon aluminum-iron alloy is added for pre-deoxidation during the steelmaking process, and then 11 tons of ferrosilicon alloy is added in batches. After that, the molten steel is transported to the wire feeder behind the furnace for temperature measurement and oxygen determination. The temperature is 1616℃ and the oxygen content is 9.6ppm.

[0020] Wire feeding after the converter: 148 meters of aluminum wire is fed into the converter using a wire feeder. During the wire feeding process, 151 meters of argon gas is turned on. 3 / h to carry out strong stirring to ensure that the aluminum wire can completely enter the molten steel and achieve uniform mixing; the target aluminum content is controlled according to the internal control of 0.035% to ensure that the addition of aluminum element meets the performance requirements of the product. After the wire feeding is completed, sampling is carried out;

[0021] RH refining furnace vacuum treatment: The molten steel is hoisted to the RH refining station for vacuum treatment. During the treatment, the vacuum pump is first turned on to evacuate the furnace to reduce the pressure in the furnace. The initial temperature of the molten steel is 1606℃, and the nitrogen blowing amount is controlled to 180m 3 / h, fully stir the molten steel; when the vacuum degree reaches 0.1mba, maintain it for 10min to promote the uniformity of the composition and temperature in the molten steel. During the treatment process, according to the acid-soluble aluminum content of 0.0274% in the molten steel after wire feeding, aluminum particles are added to accurately adjust the acid-soluble aluminum content to 0.0310%; after the treatment, the molten steel is transported to the casting machine for pouring;

[0022] Through the above control, the acid-soluble aluminum content of the end-point component of oriented silicon steel is 0.0287%, which meets the requirements of the steel grade.

[0023] Further, it specifically includes:

[0024] Converter smelting: According to the conventional converter smelting process, the desulfurized molten iron is added to the converter and high-quality self-produced scrap steel is added, with a total loading amount of 302 tons; during the converter smelting process, active lime, light-burned dolomite, iron balls and other slag-making materials are added, and nitrogen is blown at the bottom during the blowing process; the oxygen content at the carbon drawing end point is 823ppm, the carbon drawing temperature is 1640℃, and a slide plate is used to block the slag during the steelmaking process;

[0025] Deoxidation and alloying: Since the oxygen content at the converter end point is >800ppm, 250kg of micro-carbon aluminum-iron alloy is added for pre-deoxidation during the steelmaking process, and then 11 tons of ferrosilicon alloy is added in batches. After that, the molten steel is transported to the wire feeder behind the furnace for temperature measurement and oxygen determination. The temperature is 1620℃ and the oxygen content is 11.2ppm.

[0026] Wire feeding after the converter: 153 meters of aluminum wire is fed into the converter using a wire feeder. During the wire feeding process, argon gas is turned on for 150m 3 / h to carry out strong stirring to ensure that the aluminum wire can completely enter the molten steel and achieve uniform mixing; the target aluminum content is controlled according to the internal control of 0.035% to ensure that the addition of aluminum element meets the performance requirements of the product. After the wire feeding is completed, sampling is carried out;

[0027] RH refining furnace vacuum treatment: The molten steel is hoisted to the RH refining station for vacuum treatment. During the treatment, the vacuum pump is first turned on to evacuate the furnace to reduce the pressure in the furnace. The initial temperature of the molten steel is 1610℃, and the nitrogen blowing amount is controlled to 180m 3 / h, fully stir the molten steel; when the vacuum degree reaches 0.1mbar, maintain it for 10min to promote the uniformity of the composition and temperature in the molten steel. During the treatment process, according to the acid-soluble aluminum content of the molten steel after wire feeding of 0.0281%, aluminum particles are added to accurately adjust the acid-soluble aluminum content to 0.0310%; after the treatment, the molten steel is transported to the casting machine for pouring;

[0028] Through the above control, the acid-soluble aluminum content of the end-point component of oriented silicon steel is 0.0285%, which meets the requirements of the steel grade.

[0029] Compared with the prior art, the beneficial technical effects of the present invention are:

[0030] The present invention adopts a method of feeding aluminum wire using a wire feeder after the converter furnace, and monitors the temperature and composition changes of molten steel in real time during the process. The wire feeding speed is adjusted according to the monitoring results, so that it can better adapt to various production conditions, thereby achieving accurate control of the acid-melted aluminum content, improving the accuracy and stability of composition control, and reducing composition fluctuations. Moreover, this method and system are simple to operate, easy to achieve automatic control, and can effectively improve production efficiency and product quality. DETAILED DESCRIPTION

[0031] The present invention is further described below by way of examples.

[0032] Example 1

[0033] A method for accurately controlling acid-dissolved aluminum in oriented silicon steel comprises the following steps:

[0034] Converter smelting: According to the conventional converter smelting process, the desulfurized molten iron is added to the converter and self-produced high-quality scrap steel is added, with a total loading of 303 tons. During the converter smelting process, active lime, light-burned dolomite, iron balls and other slag-making materials are added. The blowing process adopts the top and bottom combined blowing mode, and nitrogen is used for the bottom blowing gas throughout the process. At the end point control, the oxygen is 737ppm, the temperature is 1632℃, and the sliding plate slag blocking process is adopted in the steel tapping process.

[0035] Deoxidation and alloying: Since the oxygen content at the converter end point is ≤800ppm, 200kg of aluminum-iron alloy is added for pre-deoxidation during the steelmaking process, and then 11 tons of ferrosilicon alloy is added in batches. The molten steel is then transported to the wire feeder behind the furnace for temperature measurement and oxygen determination. The temperature is 1613℃ and the oxygen is 10.3ppm.

[0036] Wire feeding after the converter: 150 meters of aluminum wire is fed into the converter using a wire feeder. During the wire feeding process, argon gas is turned on for 150m 3 / h for strong stirring to ensure that the aluminum wire can completely enter the molten steel and achieve uniform mixing. The target aluminum content is precisely controlled within 0.035% to ensure that the amount of aluminum added meets the performance requirements of the product. After the wire feeding is completed, sampling is carried out.

[0037] RH refining furnace vacuum treatment: The molten steel is hoisted to the RH refining station for vacuum treatment. During the treatment, the vacuum pump is first turned on to evacuate the furnace to reduce the pressure. The initial temperature of the molten steel is 1603℃, and the nitrogen injection volume is controlled to be 180m 3 / h, fully stir the molten steel. When the vacuum reaches 0.1mba, keep it for 10min to promote the uniformity of the composition and temperature in the molten steel. During the treatment process, according to the result of acid-soluble aluminum in the molten steel after wire feeding, which is 0.0285%, aluminum particles are added to accurately adjust the acid-soluble aluminum content to 0.031%. After the treatment, the molten steel is transported to the casting machine for pouring.

[0038] Through the above control, the acid-soluble aluminum content of the end-point component of oriented silicon steel is 0.0290%, which meets the requirements of the steel grade.

[0039] Example 2

[0040] A method for accurately controlling acid-dissolved aluminum in oriented silicon steel comprises the following steps:

[0041] Converter smelting: According to the conventional converter smelting process, the desulfurized molten iron is added to the converter and high-quality self-produced scrap steel is added, with a total loading of 305 tons. During the converter smelting process, active lime, light-burned dolomite, iron balls and other slag-making materials are added, and nitrogen is blown at the bottom during the blowing process. The oxygen content at the carbon pulling end point is 754ppm, the carbon pulling temperature is 1637℃, and the slide plate is used to block the slag during the steel tapping process.

[0042] Deoxidation and alloying: Since the oxygen content at the converter end point is ≤800ppm, 200kg of micro-carbon aluminum-iron alloy is added for pre-deoxidation during the steelmaking process, and then 11 tons of ferrosilicon alloy is added in batches. The molten steel is then transported to the wire feeder behind the furnace for temperature measurement and oxygen determination. The temperature is 1616℃ and the oxygen content is 9.6ppm.

[0043] Wire feeding after the converter: 148 meters of aluminum wire is fed into the converter using a wire feeder. During the wire feeding process, argon gas is turned on at 151m 3 / h for strong stirring to ensure that the aluminum wire can completely enter the molten steel and achieve uniform mixing. The target aluminum content is controlled according to the internal control of 0.035% to ensure that the addition of aluminum element meets the performance requirements of the product. After the wire feeding is completed, sampling is carried out.

[0044] RH refining furnace vacuum treatment: The molten steel is hoisted to the RH refining station for vacuum treatment. During the treatment, the vacuum pump is first turned on to evacuate the furnace to reduce the pressure in the furnace. The initial temperature of the molten steel is 1606℃, and the nitrogen injection volume is controlled to be 180m 3 / h, fully stir the molten steel. When the vacuum reaches 0.1mba, keep it for 10min to promote the uniformity of the composition and temperature in the molten steel. During the treatment process, according to the acid-soluble aluminum content of 0.0274% in the molten steel after wire feeding, aluminum particles are added to accurately adjust the acid-soluble aluminum content to 0.0310%. After the treatment, the molten steel is transported to the casting machine for pouring.

[0045] Through the above control, the acid-soluble aluminum content of the end-point component of oriented silicon steel is 0.0287%, which meets the requirements of the steel grade.

[0046] Example 3

[0047] A method for accurately controlling acid-dissolved aluminum in oriented silicon steel comprises the following steps:

[0048] Converter smelting: According to the conventional converter smelting process, the desulfurized molten iron is added to the converter and high-quality self-produced scrap steel is added, with a total loading of 302 tons. During the converter smelting process, active lime, light-burned dolomite, iron balls and other slag-making materials are added, and nitrogen is blown at the bottom during the blowing process. The oxygen content at the carbon pulling end point is 823ppm, the carbon pulling temperature is 1640℃, and the slide plate is used to block the slag during the steel tapping process.

[0049] Deoxidation and alloying: Since the oxygen content at the converter end point is >800ppm, 250kg of micro-carbon aluminum-iron alloy is added for pre-deoxidation during the steelmaking process, and then 11 tons of ferrosilicon alloy is added in batches. The molten steel is then transported to the wire feeder behind the furnace for temperature measurement and oxygen determination. The temperature is 1620℃ and the oxygen content is 11.2ppm.

[0050] Wire feeding after the converter: A wire feeder is used to feed 153 meters of aluminum wire after the converter. During the wire feeding process, argon gas is turned on for 150m3 / h for strong stirring to ensure that the aluminum wire can completely enter the molten steel and achieve uniform mixing. The target aluminum content is controlled according to the internal control of 0.035% to ensure that the addition of aluminum element meets the performance requirements of the product. After the wire feeding is completed, sampling is carried out.

[0051] RH refining furnace vacuum treatment: The molten steel is hoisted to the RH refining station for vacuum treatment. During the treatment, the vacuum pump is first turned on to evacuate the furnace to reduce the pressure in the furnace. The initial temperature of the molten steel is 1610℃, and the nitrogen injection volume is controlled to be 180m 3 / h, fully stir the molten steel. When the vacuum reaches 0.1mba, keep it for 10min to promote the uniformity of the composition and temperature in the molten steel. During the treatment process, according to the acid-soluble aluminum content of 0.0281% in the molten steel after wire feeding, aluminum particles are added to accurately adjust the acid-soluble aluminum content to 0.0310%. After the treatment, the molten steel is transported to the casting machine for pouring.

[0052] Through the above control, the acid-soluble aluminum content of the end-point component of oriented silicon steel is 0.0285%, which meets the requirements of the steel grade.

[0053] The present invention adopts a method of feeding aluminum wire using a wire feeder after the converter furnace, and monitors the temperature and composition changes of molten steel in real time during the process. The wire feeding speed is adjusted according to the monitoring results, so that it can better adapt to various production conditions, thereby achieving accurate control of the acid-melted aluminum content, improving the accuracy and stability of composition control, and reducing composition fluctuations. Moreover, this method and system are simple to operate, easy to achieve automatic control, and can effectively improve production efficiency and product quality.

[0054] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A method for accurately controlling acid-dissolved aluminum in oriented silicon steel, characterized in that: The following steps are involved: Converter smelting: According to the conventional converter smelting process, the desulfurized molten iron is added to the converter, and active lime, light-burned dolomite, and iron ball slag-making materials are added to it during the converter smelting process. The top and bottom combined blowing mode is adopted in the blowing process, and nitrogen is used as the bottom blowing gas throughout the whole process; Deoxidation alloying: When the oxygen content at the converter end point is ≤800ppm, 200kg of aluminum-iron alloy is added during the steel-making process for pre-deoxidation, and then ferrosilicon alloy is added; when the oxygen content at the converter end point is >800ppm, 250kg of aluminum-iron alloy is added during the steel-making process for pre-deoxidation, and then ferrosilicon alloy is added; Wire feeding after the converter: After adding ferrosilicon alloy, aluminum wire is fed into the converter using an advanced wire feeder. During the wire feeding process, argon is turned on for strong stirring, and the argon flow rate must be strictly controlled to ensure that the aluminum wire can completely enter the molten steel and achieve uniform mixing. The target aluminum content is precisely controlled according to the internal control upper limit + 0.003% to ensure that the amount of aluminum added meets the performance requirements of the product. RH refining furnace vacuum treatment: The molten steel is hoisted to the RH refining station for vacuum treatment. During the treatment, the vacuum pump is first turned on to evacuate the furnace to reduce the pressure in the furnace. According to the initial composition and temperature of the molten steel, the amount of nitrogen blown in is controlled to fully stir the molten steel. When the vacuum degree reaches the set value, it is maintained for a period of time to promote the uniformity of the composition and temperature in the molten steel. During the vacuum treatment, according to the analysis results of the molten steel composition, aluminum particles are added to accurately adjust the acid-soluble aluminum content to the target value. After the treatment is completed, the vacuum is broken to restore the pressure in the furnace, and the molten steel is sampled and tested to ensure that the acid-soluble aluminum content meets the requirements.

2. The method for accurately controlling acid-dissolved aluminum in oriented silicon steel according to claim 1, characterized in that: In the converter smelting step, during endpoint control, the oxygen is 737 ppm, the temperature is 1632° C., and the steel tapping process adopts a slide plate slag blocking process.

3. The method for accurately controlling acid-dissolved aluminum in oriented silicon steel according to claim 1, characterized in that: After wire feeding is completed, sampling is carried out to detect and analyze the aluminum content in the molten steel in a timely manner, providing accurate data support for subsequent process adjustments.

4. The method for accurately controlling acid-dissolved aluminum in oriented silicon steel according to claim 2, characterized in that: During the steel-making process, 200 kg of aluminum-iron alloy was added for pre-deoxidation, and then 11 tons of ferrosilicon alloy was added in batches. The molten steel was then transported to the wire feeder behind the furnace for temperature measurement and oxygen determination. The temperature was 1613°C and the oxygen was 10.3 ppm.

5. The method for accurately controlling acid-dissolved aluminum in oriented silicon steel according to claim 3, characterized in that: A wire feeder is used to feed 150 meters of aluminum wire behind the converter. During the wire feeding process, argon gas is turned on for 150m 3 / h for strong stirring to ensure that the aluminum wire can completely enter the molten steel and achieve uniform mixing.

6. The method for accurately controlling acid-dissolved aluminum in oriented silicon steel according to claim 4, characterized in that: The initial temperature of the molten steel was 1603°C, and the nitrogen injection rate was controlled to be 180m 3 / h, fully stir the molten steel. When the vacuum reaches 0.1mbar, maintain it for 10min to promote uniform composition and temperature in the molten steel. During the treatment process, according to the result of acid-soluble aluminum in the molten steel after wire feeding, which is 0.0285%, aluminum particles are added to accurately adjust the acid-soluble aluminum content to 0.031%. After the treatment, the molten steel is transported to the casting machine for pouring; Through the above control, the acid-soluble aluminum content of the end-point component of oriented silicon steel is 0.0290%, which meets the requirements of the steel grade.

7. The method for accurately controlling acid-dissolved aluminum in oriented silicon steel according to claim 1, characterized in that: Specifically include: Converter smelting: According to the conventional converter smelting process, the desulfurized molten iron is added into the converter and high-quality self-produced scrap steel is added, with a total loading amount of 305 tons; During the converter smelting process, active lime, light-burned dolomite, iron balls and other slag-forming materials are added to the converter, and nitrogen is blown at the bottom during the blowing process. The oxygen content at the carbon drawing end point is 754ppm, the carbon drawing temperature is 1637℃, and a slide plate is used to block the slag during the steel tapping process. Deoxidation and alloying: Since the oxygen content at the converter end point is ≤800ppm, 200kg of micro-carbon aluminum-iron alloy is added for pre-deoxidation during the steelmaking process, and then 11 tons of ferrosilicon alloy is added in batches. After that, the molten steel is transported to the wire feeder behind the furnace for temperature measurement and oxygen determination. The temperature is 1616℃ and the oxygen content is 9.6ppm. Wire feeding after the converter: 148 meters of aluminum wire is fed into the converter using a wire feeder. During the wire feeding process, 151 meters of argon gas is turned on. 3 / h to carry out strong stirring to ensure that the aluminum wire can completely enter the molten steel and achieve uniform mixing; the target aluminum content is controlled according to the internal control of 0.035% to ensure that the addition of aluminum element meets the performance requirements of the product. After the wire feeding is completed, sampling is carried out; RH refining furnace vacuum treatment: The molten steel is hoisted to the RH refining station for vacuum treatment. During the treatment, the vacuum pump is first turned on to evacuate the furnace to reduce the pressure in the furnace. The initial temperature of the molten steel is 1606℃, and the nitrogen blowing amount is controlled to 180m 3 / h, fully stir the molten steel; when the vacuum degree reaches 0.1mba, maintain it for 10min to promote the uniformity of the composition and temperature in the molten steel. During the treatment process, according to the acid-soluble aluminum content of 0.0274% in the molten steel after wire feeding, aluminum particles are added to accurately adjust the acid-soluble aluminum content to 0.0310%; after the treatment, the molten steel is transported to the casting machine for pouring; Through the above control, the acid-soluble aluminum content of the end-point component of oriented silicon steel is 0.0287%, which meets the requirements of the steel grade.

8. The method for accurately controlling acid-dissolved aluminum in oriented silicon steel according to claim 1, characterized in that: Specifically include: Converter smelting: According to the conventional converter smelting process, the desulfurized molten iron is added into the converter and high-quality self-produced scrap steel is added, with a total loading amount of 302 tons; During the converter smelting process, active lime, light-burned dolomite, iron balls and other slag-forming materials are added to it, and nitrogen is blown at the bottom during the blowing process; the oxygen content at the carbon drawing end point is 823ppm, the carbon drawing temperature is 1640℃, and a slide plate is used to block the slag during the steel tapping process; Deoxidation and alloying: Since the oxygen content at the converter end point is >800ppm, 250kg of micro-carbon aluminum-iron alloy is added for pre-deoxidation during the steelmaking process, and then 11 tons of ferrosilicon alloy is added in batches. After that, the molten steel is transported to the wire feeder behind the furnace for temperature measurement and oxygen determination. The temperature is 1620℃ and the oxygen content is 11.2ppm. Wire feeding after the converter: 153 meters of aluminum wire is fed into the converter using a wire feeder. During the wire feeding process, argon gas is turned on for 150m 3 / h to carry out strong stirring to ensure that the aluminum wire can completely enter the molten steel and achieve uniform mixing; the target aluminum content is controlled according to the internal control of 0.035% to ensure that the addition of aluminum element meets the performance requirements of the product. After the wire feeding is completed, sampling is carried out; RH refining furnace vacuum treatment: The molten steel is hoisted to the RH refining station for vacuum treatment. During the treatment, the vacuum pump is first turned on to evacuate the furnace to reduce the pressure in the furnace. The initial temperature of the molten steel is 1610℃, and the nitrogen blowing amount is controlled to 180m 3 / h, fully stir the molten steel; when the vacuum degree reaches 0.1mbar, maintain it for 10min to promote the uniformity of the composition and temperature in the molten steel. During the treatment process, according to the acid-soluble aluminum content of the molten steel after wire feeding of 0.0281%, aluminum particles are added to accurately adjust the acid-soluble aluminum content to 0.0310%; after the treatment, the molten steel is transported to the casting machine for pouring; Through the above control, the acid-soluble aluminum content of the end-point component of oriented silicon steel is 0.0285%, which meets the requirements of the steel grade.