A smelting method of high-titanium high-sulfur stainless steel

Abstract

The application discloses a smelting method of high-titanium high-sulfur stainless steel, which comprises the following steps: step a, adding scrap steel and / or the same steel return material into an electric furnace according to target component requirements for smelting, wherein the molten steel after smelting contains C: 1%-2%, Si: ≤0.70%, Mn: ≤0.7%, P: ≤0.035%, S: ≤0.050% and Cr: 17%-18%, and the smelting temperature is 1600-1650 DEG C, thereby obtaining A product; step b, tapping the A product into an AOD furnace, sequentially experiencing a pretreatment period, a decarburization period, a pre-reduction period and a reduction period, thereby obtaining B product; step c, transferring the B product to an LF furnace, electrically heating and slagging, then using lime to slag and adjust the slag, sampling and analyzing the molten steel components, and supplementing the components, thereby obtaining C product; and step d, casting the C product, and obtaining the finished product after cooling. The application has the advantages that the molten steel can be stably controlled under the conditions of high-alkalinity slag deoxidization and desulfurization, and the high-titanium high-sulfur components are improved, thereby improving the qualified rate of smelting.

Description

Technical Field

[0001] This invention belongs to the field of stainless steel smelting. Background Technology

[0002] Titanium-containing steel can significantly improve the resistance of stainless steel to intergranular corrosion, while sulfur-containing steel can enhance the machinability of stainless steel. In some applications, a particular steel grade is required to contain not only titanium to improve resistance to intergranular corrosion but also sulfur to improve machinability.

[0003] Based on the characteristics of Ti and S elements during the smelting process, the stability of Ti in molten steel is directly proportional to the slag basicity, while the stability of S in molten steel is inversely proportional to the slag basicity. Under current smelting processes, the composition control of Ti and S elements fluctuates greatly during smelting, especially in the smelting of high-titanium and high-sulfur stainless steel. Under the conditions of deoxidation and desulfurization of high-basicity slag, the qualified rate of molten steel composition is only about 50%. Summary of the Invention

[0004] The purpose of this invention is to provide a method for smelting high-titanium, high-sulfur stainless steel. This invention has the advantage of being able to stably control the high-titanium, high-sulfur composition of molten steel under conditions of deoxidation and desulfurization in high-basicity slag, thereby improving the smelting yield.

[0005] The technical solution of this invention: a method for smelting high-titanium, high-sulfur stainless steel, comprising the following steps:

[0006] Step a: According to the target composition requirements, add scrap steel and / or recycled material of this steel grade to the electric furnace for smelting. The molten steel after smelting has the following composition: C: 1%-2%, Si: ≤0.70%, Mn: ≤0.7%, P≤0.035%, S: ≤0.050%, Cr: 17%-18%. The smelting temperature is 1600-1650℃ to obtain product A.

[0007] Step b: Grade A steel is tapped and fed into the AOD furnace, and then goes through four stages in sequence: pretreatment period, decarburization period, pre-reduction period and reduction period to obtain Grade B.

[0008] Step c: Transfer product B to the LF furnace, heat it up with electricity to slag, so that the slag has a certain fluidity, then use lime to make slag and adjust the slag, then take a sample to analyze the composition of the molten steel, and add components according to the analysis results to obtain product C;

[0009] Step d: Casting under argon protection, and obtaining the finished product after cooling.

[0010] In the aforementioned smelting method for high-titanium and high-sulfur stainless steel, during the pretreatment period of step b, lime is added to the furnace according to the requirement that the binary basicity of the slag is greater than 1.5; a carbon raiser is added according to the requirement that the C content in the furnace is ≥1.5%; oxygen is blown throughout the pretreatment period to remove silicon, so that the Si content in the molten steel is ≤0.30%; after the oxygen blowing desiliconization is completed, the slag is removed.

[0011] In the aforementioned smelting method for high-titanium and high-sulfur stainless steel, during the pretreatment period, the amount of lime added is 16.5-16.8 kg per ton of molten steel, and the amount of carbon raiser added is 5.2-5.45 kg per ton of molten steel.

[0012] In the aforementioned smelting method for high-titanium and high-sulfur stainless steel, during the decarburization period of step b, the steel composition is sampled and analyzed. Based on the difference between the steel composition and the target composition, ferrochrome alloy is added. Lime is added to the furnace according to the requirements of steel carbon content, decarburization efficiency, and binary basicity greater than 1.8. During the entire decarburization period, oxygen and argon are used for blowing to ensure that the steel C: ≤0.01%.

[0013] In the aforementioned smelting method for high-titanium and high-sulfur stainless steel, during the decarburization period, the amount of ferrochrome alloy added is 10-16 kg per ton of molten steel, and the amount of lime added is 700 ± 2 kg per ton of molten steel.

[0014] In the aforementioned smelting method for high-titanium and high-sulfur stainless steel, during the pre-reduction period of step b, ferrosilicon and pure aluminum are added, argon gas is blown throughout the process, and stirring is carried out for 4-6 minutes. After pre-reduction, the temperature of the molten steel is controlled at 1760℃-1780℃, and the slag basicity is greater than 1.8. After the chromium and manganese in the molten steel are fully reduced to the budget target, slag removal is carried out, and the amount of slag remaining in the furnace is less than 200Kg.

[0015] In the aforementioned smelting method for high-titanium and high-sulfur stainless steel, during the pre-reduction period, the addition amounts of ferrosilicon and pure aluminum are 23±0.5Kg and 5.8±0.5Kg per ton of molten steel, respectively.

[0016] In the aforementioned smelting method for high-titanium and high-sulfur stainless steel, during the reduction period of step b, lime, fluorite, and aluminum ingots are added. The amount of lime added is 12-15 kg / ton, the ratio of lime to fluorite is 10:7, and the amount of aluminum ingots added is 1.5 kg / ton. Argon gas is blown throughout the process, and the mixture is stirred for 4-6 minutes. After the molten steel is well deoxidized and the slag is yellowish-white or grayish-white, the slag is skimmed off to leave 200 kg-300 kg of slag in the furnace.

[0017] In the aforementioned smelting method for high-titanium and high-sulfur stainless steel, during the reduction period, the amounts of lime, fluorite, and aluminum ingots added are 14±0.5 kg, 10±0.5 kg, and 1.5±0.1 kg per ton of molten steel, respectively.

[0018] In the aforementioned smelting method for high-titanium and high-sulfur stainless steel, in step c, the titanium alloy and ferrous sulfate are pre-baked to ensure the surface is clean, free of oil and impurities. The titanium alloy and ferrous sulfate are then placed in a ladle, and product B is tapped into the ladle. During the tapping process, a weak argon blowing state is maintained to prevent oxidation of the molten steel. After the molten steel stabilizes in the ladle, lime is added to the ladle, and then the ladle is transferred to the LF furnace.

[0019] Compared with existing technologies, this invention achieves stable control of Ti and S element content during smelting by controlling slag basicity, slag quantity, temperature, process composition, and raw material management. This improves the steel composition qualification rate, achieving up to 95% qualification rate in multiple experiments. The core technologies are low-alkali pretreatment for desiliconization, high-alkali decarburization to preserve Ti, slag quantity control to reduce S loss, and Ti / S addition in the ladle to prevent burn-off. Therefore, this invention has the advantage of stably controlling high-titanium and high-sulfur components in molten steel under high-alkali slag deoxidation and desulfurization conditions, thereby improving the smelting qualification rate. Detailed Implementation

[0020] The present invention will be further described below with reference to embodiments, but these embodiments are not intended to limit the scope of the invention.

[0021] Example 1: A smelting method for high-titanium, high-sulfur stainless steel, specifically SUS430FTi. The customer's requirements for the finished steel composition are: C ≤ 0.02%, Si: 0.20%-0.50%, Mn: 0.40%-0.70%, P ≤ 0.035%, S: 0.16%-0.22%, Cr: 17.40%-18.50%, N: ≤ 0.018%, Ti: 0.30-0.40%. The method includes the following steps:

[0022] Step a: According to the target composition requirements, high-quality scrap steel and / or recycled material of this steel grade are added to the electric furnace for smelting. The resulting molten steel is sampled and analyzed: C: 1.45%, Si: 0.68%, Mn: 0.39%, P: 0.031%, S: 0.038%, Cr: 16.98%, temperature 1637℃. The molten steel is tapped into a ladle to obtain grade A.

[0023] Step b: Grade A steel is tapped and added to the AOD furnace, with a steel volume of 29.8 tons. It goes through four stages in sequence: pretreatment period, decarburization period, pre-reduction period and reduction period, to obtain Grade B steel.

[0024] Pretreatment period: Based on the requirement of a binary basicity of slag greater than 1.5, add 500 kg of lime to the furnace; add 160 kg of recarburizer according to the requirement of C: ≥1.5% in the furnace; during the pretreatment period, oxygen is blown throughout to remove silicon, so that Si: ≤0.30% in the molten steel, with a total oxygen consumption of 280 mg / L. 3C: 1.79%, Si: 0.13%, Mn: 0.35%, P: 0.031%, S: 0.033%, Cr: 16.85%. After oxygen blowing desiliconization, all slag was removed.

[0025] Decarburization period: Steel composition was sampled and analyzed. Based on the difference between the steel composition and the target composition, 380 kg of high-carbon ferrochrome alloy was added. 2100 kg of lime was added to the furnace according to the requirements of steel carbon content, decarburization efficiency, and binary basicity greater than 1.8. Throughout the decarburization period, oxygen and argon were used for blowing to ensure that the carbon content of the steel was ≤0.01%, with a total oxygen consumption of 1220 mg / L. 3 Argon consumption 1085m 3 Sampling analysis C: 0.008%.

[0026] Pre-reduction period: Add 690 kg of ferrosilicon and 180 kg of pure aluminum, purge with argon gas throughout, and stir for 5 minutes in a pure argon environment. After pre-reduction, the molten steel temperature is 1765℃, and the slag basicity is greater than 1.8. Sampling analysis: C: 0.009%, Si: 0.12%, P: 0.030%, S: 0.016%, Cr: 18.05%, N: 0.011%. Chromium and manganese in the molten steel are fully reduced to the expected target. Slag removal is performed, and the amount of slag remaining in the furnace is less than 200 kg.

[0027] Reduction period: Add 420 kg of lime (preferably high grade lime), 295 kg of fluorite and 45 kg of aluminum ingots. Purge with argon gas throughout the process and stir for 4 minutes in a pure argon environment. When the slag turns yellowish-white or grayish-white, it indicates that the molten steel has been well deoxidized. Then proceed with slag removal. The amount of slag remaining in the furnace is 200 kg.

[0028] Step c: Preheat the titanium alloy and ferrous sulfate to ensure a clean, oil-free, and impurity-free surface. Place 240 kg of titanium alloy and 270 kg of ferrous sulfate in a ladle, then tap grade B steel into the ladle. Maintain a weak argon blowing state during tapping to prevent oxidation of the molten steel. After the molten steel stabilizes in the ladle, add 150 kg of lime (preferably high-grade lime) to the ladle, then transfer the ladle to the LF furnace for refining. The LF furnace is energized and heated to slag, giving the slag a certain degree of fluidity. Then, use 100 kg of lime (preferably high-grade lime) to form and adjust the slag, sprinkling the lime onto the slag surface in small batches. Sampling and analyzing the molten steel composition: C: 0.014%, Si: 0.38%, Mn: 0.45%, P: 0.030%, S: 0.196%, Cr: 17.69%, N: 0.014%, Ti: 0.32%. Based on the analysis results, calculate and add 10 kg of titanium alloy to ensure the composition meets the finished product requirements. The temperature was measured at 1576℃, which meets the temperature requirement, thus obtaining grade C.

[0029] Step d: Product C is hoisted to the mold for argon-protected casting, and after cooling, the finished product is obtained.

[0030] The sample analysis results of the finished product are as follows: C: 0.016%, Si: 0.42%, Mn: 0.45%, P: 0.030%, S: 0.192%, Cr: 17.65%, N: 0.015%, Ti: 0.33%, and the composition is qualified.

[0031] Example 2: A method for smelting high-titanium, high-sulfur stainless steel, using the same steel grade as in Example 1, including the following steps:

[0032] Step a: According to the target composition requirements, high-quality scrap steel and / or recycled steel of this grade are added to the electric furnace for smelting. The resulting molten steel is sampled and analyzed: C: 1.51%, Si: 0.66%, Mn: 0.34%, P: 0.030%, S: 0.033%, Cr: 17.13%, temperature 1628℃. The molten steel is tapped into a ladle to obtain grade A.

[0033] Step b: Grade A steel is tapped and added to the AOD furnace. The steel volume is 30.1 tons. It goes through four stages in sequence: pretreatment period, decarburization period, pre-reduction period and reduction period to obtain Grade B.

[0034] Pretreatment period: Based on the requirement of a binary basicity of slag greater than 1.5, add 500 kg of lime to the furnace; add 150 kg of carburizing agent according to the requirement of C ≥ 1.5% in the furnace; during the pretreatment period, oxygen is blown throughout for desiliconization, so that Si in the molten steel is ≤ 0.30%, with a total oxygen consumption of 290 m3. C: 1.72%, Si: 0.11%, Mn: 0.29%, P: 0.030%, S: 0.032%, Cr: 17.03%. After oxygen blowing for desiliconization, remove all slag.

[0035] Decarburization period: Steel composition was sampled and analyzed. Based on the difference between the steel composition and the target composition, 320 kg of high-carbon ferrochrome alloy was added. 2100 kg of lime was added to the furnace according to the requirements of steel carbon content, decarburization efficiency, and binary basicity greater than 1.8. Throughout the decarburization period, oxygen and argon were used for blowing to ensure that the carbon content of the steel was ≤0.01%, with a total oxygen consumption of 1290 mg / L. 3 Argon consumption 1120m 3 Sampling analysis C: 0.007%.

[0036] Pre-reduction period: 670 kg of ferrosilicon and 160 kg of pure aluminum were added, and argon gas was purged throughout the process. The mixture was stirred for 5 minutes in a pure argon environment. After pre-reduction, the temperature of the molten steel was 1771℃, and the slag basicity was greater than 1.8. Sampling analysis: C: 0.008%, Si: 0.15%, P: 0.030%, S: 0.013%, Cr: 18.12%, N: 0.012%. Chromium and manganese in the molten steel were fully reduced to the expected target. Slag removal was performed, and the amount of slag remaining in the furnace was less than 200 kg.

[0037] Reduction period: Add 430 kg of lime (preferably high grade lime), 300 kg of fluorite and 45 kg of aluminum ingots. Purge with argon gas throughout the process and stir for 4 minutes in a pure argon environment. When the slag is yellowish-white or grayish-white, it indicates that the molten steel has been well deoxidized. Then perform slag removal treatment, leaving 200 kg of slag in the furnace.

[0038] Step c: Preheat the titanium alloy and ferrous sulfate to ensure a clean, oil-free, and impurity-free surface. Place 245 kg of titanium alloy and 280 kg of ferrous sulfate in a ladle, then tap grade B steel into the ladle. Maintain a weak argon blowing state during tapping to prevent oxidation of the molten steel. After the molten steel stabilizes in the ladle, add 150 kg of lime (preferably high-grade lime) to the ladle, then transfer the ladle to the LF furnace for refining. The LF furnace is energized and heated to slag, giving the slag a certain degree of fluidity. Then, use 110 kg of lime (preferably high-grade lime) to form and adjust the slag, sprinkling the lime onto the slag surface in small batches. Sampling and analyzing the molten steel composition: C: 0.015%, Si: 0.41%, Mn: 0.45%, P: 0.030%, S: 0.203%, Cr: 17.72%, N: 0.013%, Ti: 0.33%. Based on the analysis results, calculate and add 8 kg of titanium alloy to ensure the composition meets the finished product requirements. The temperature was measured at 1581℃, which meets the temperature requirement, thus obtaining grade C.

[0039] Step d: Product C is hoisted to the mold for argon-protected casting, and after cooling, the finished product is obtained.

[0040] The sample analysis results of the finished product are as follows: C: 0.017%, Si: 0.44%, Mn: 0.45%, P: 0.030%, S: 0.198%, Cr: 17.70%, N: 0.014%, Ti: 0.32%, and the composition is qualified.

[0041] Comparative Example: The steel grade of Example 1 is smelted using an existing process, including the following steps:

[0042] Step a: According to the target composition requirements, high-quality scrap steel and / or recycled steel of this grade are added to the electric furnace for smelting. The resulting molten steel is sampled and analyzed: C: 1.42%, Si: 0.65%, Mn: 0.38%, P: 0.030%, S: 0.036%, Cr: 16.86%, temperature 1625℃. The molten steel is tapped into a ladle to obtain grade A.

[0043] Step b: Grade A steel is tapped and added to the AOD furnace, with a steel volume of 29.6 tons. It goes through four stages in sequence: pretreatment period, decarburization period, pre-reduction period and reduction period, to obtain Grade B steel.

[0044] Pretreatment period: Based on the requirement of a binary basicity of slag greater than 1.3, add 300 kg of lime to the furnace; add 150 kg of recarburizing agent according to the requirement of C ≥ 1.5% in the furnace; during the pretreatment period, oxygen is blown throughout to remove silicon, so that Si in the molten steel is ≤ 0.30%, with a total oxygen consumption of 270 mg / L.3 C: 1.73%, Si: 0.15%, Mn: 0.36%, P: 0.030%, S: 0.033%, Cr: 16.75%. After oxygen blowing desiliconization, all slag was removed.

[0045] Decarburization period: Steel composition was sampled and analyzed. Based on the difference between the steel composition and the target composition, 430 kg of high-carbon ferrochrome alloy was added. 1800 kg of lime was added to the furnace according to the requirements of steel carbon content, decarburization efficiency, and binary basicity greater than 1.5. Throughout the decarburization period, oxygen and argon were used for blowing to ensure that the carbon content of the steel was ≤0.01%, with a total oxygen consumption of 1183 m³. 3 Argon consumption 1046m 3 Sampling analysis C: 0.007%.

[0046] Pre-reduction period: Add 630 kg of ferrosilicon and 150 kg of pure aluminum, purge with argon gas throughout, and stir for 5 minutes in a pure argon environment. After pre-reduction, the molten steel temperature is 1734℃, and the slag basicity is greater than 1.5. Sampling analysis: C: 0.008%, Si: 0.09%, P: 0.030%, S: 0.017%, Cr: 18.02%, N: 0.013%. Chromium and manganese in the molten steel are reduced to the expected target. Slag removal is performed, and the amount of slag remaining in the furnace is less than 300 kg.

[0047] Reduction period: Add 430 kg of lime (preferably high grade lime), 270 kg of fluorite and 45 kg of aluminum ingots, purge with argon gas throughout, stir for 4 minutes in a pure argon environment, the slag is light green or white, no slag removal is performed, the amount of slag in the furnace is 1000 kg-1100 kg.

[0048] Step c: Preheat the titanium alloy and ferrite to ensure a clean, oil-free, and impurity-free surface. Place 280 kg of titanium alloy and 310 kg of ferrite in a ladle, then tap grade B steel into the ladle. Maintain a weak argon blowing state during tapping to prevent oxidation of the molten steel. After the molten steel stabilizes in the ladle, transfer the ladle to the LF furnace for refining. Power the LF furnace to raise the temperature and slag, giving the slag a certain degree of fluidity. Then, use 100 kg of lime (preferably high-grade lime) to form and adjust the slag. Sprinkle the lime onto the slag surface in small batches. Take samples to analyze the molten steel composition: C: 0.014%, Si: 0.39%, Mn: 0.45%, P: 0.030%, S: 0.135%, Cr: 17.69%, N: 0.014%, Ti: 0.27%. Based on the analysis results, calculate and add 30 kg of titanium alloy and 100 kg of ferrite, then power the furnace to raise the temperature. Temperature measured at 1554℃, sample analysis showed C: 0.018%, Si: 0.48%, Mn: 0.45%, P: 0.030%, S: 0.165%, Cr: 17.68%, N: 0.014%, Ti: 0.31%, yielding grade C;

[0049] Step d: Product C is hoisted to the mold for argon-protected casting, and after cooling, the finished product is obtained.

[0050] Finished product sampling analysis results: C: 0.021%, Si: 0.50%, Mn: 0.44%, P: 0.030%, S: 0.154%, Cr: 17.65%, N: 0.015%, Ti: 0.29%. The C, S, and Ti components do not meet the customer's component requirements, and the composition of this furnace is unqualified.

[0051] The main differences between Examples 1 and 2 and the comparative example are: different basicities were used during the pre-reduction period; a high-basicity slag system commonly used in stainless steel smelting was used for desulfurization and deoxidation during the reduction period, and slag removal was not performed during the reduction period; and a commonly used smelting temperature for stainless steel was used. In the comparative example, since the stability of Ti in molten steel is directly proportional to the slag basicity, while the stability of S in molten steel is inversely proportional to the slag basicity, unreasonable basicity, slag quantity, and temperature led to large fluctuations in Ti and S composition, ultimately resulting in unqualified composition control in this furnace.

Claims

1. A method for smelting high-titanium, high-sulfur stainless steel, characterized in that: Includes the following steps, Step a: According to the target composition requirements, add scrap steel and / or recycled material of this steel grade to the electric furnace for smelting. The molten steel after smelting has the following composition: C: 1%-2%, Si: ≤0.70%, Mn: ≤0.7%, P≤0.035%, S: ≤0.050%, Cr: 17%-18%. The smelting temperature is 1600-1650℃ to obtain product A. Step b: Grade A steel is tapped and fed into the AOD furnace, and then goes through four stages in sequence: pretreatment period, decarburization period, pre-reduction period and reduction period to obtain Grade B. Step c: Transfer product B to the LF furnace, heat it up with electricity to slag, so that the slag has a certain fluidity, then use lime to make slag and adjust the slag, then take a sample to analyze the composition of the molten steel, and add components according to the analysis results to obtain product C; Step d: Casting under argon protection, and obtaining the finished product after cooling.

2. The smelting method for high-titanium, high-sulfur stainless steel according to claim 1, characterized in that: In step b, during the pretreatment period, lime is added to the furnace according to the requirement that the binary basicity of the slag is greater than 1.5; a carbon raiser is added according to the requirement that the C content in the furnace is ≥1.5%; oxygen is blown throughout the pretreatment period to remove silicon, so that the Si content in the molten steel is ≤0.30%; after the oxygen blowing desiliconization is completed, the slag is removed.

3. The smelting method for high-titanium, high-sulfur stainless steel according to claim 2, characterized in that: During the pretreatment period, the amount of lime added is 16.5-16.8 kg per ton of molten steel, and the amount of carburizing agent added is 5.2-5.45 kg per ton of molten steel.

4. The smelting method for high-titanium, high-sulfur stainless steel according to claim 1, characterized in that: In step b, during the decarburization period, samples of molten steel are taken for analysis. Based on the difference between the molten steel composition and the target composition, ferrochrome alloy is added. Lime is added to the furnace according to the requirements of molten steel carbon content, decarburization efficiency, and binary basicity greater than 1.

8. During the entire decarburization period, oxygen and argon are used for blowing to ensure that the molten steel C: ≤0.01%.

5. The smelting method for high-titanium, high-sulfur stainless steel according to claim 4, characterized in that: During the decarburization period, the amount of ferrochrome alloy added is 10-16 kg per ton of molten steel, and the amount of lime added is 700 ± 2 kg per ton of molten steel.

6. The smelting method for high-titanium, high-sulfur stainless steel according to claim 1, characterized in that: In the pre-reduction period of step b, ferrosilicon and pure aluminum are added, argon gas is blown throughout the process, and stirring is carried out for 4-6 minutes. After pre-reduction, the temperature of molten steel is controlled at 1760℃-1780℃, and the slag basicity is greater than 1.

8. After the chromium and manganese in the molten steel are fully reduced to the budget target, slag removal is carried out, and the amount of slag remaining in the furnace is less than 200Kg.

7. The smelting method for high-titanium, high-sulfur stainless steel according to claim 6, characterized in that: During the pre-reduction period, the addition amounts of ferrosilicon and pure aluminum were 23±0.5 kg and 5.8±0.5 kg per ton of molten steel, respectively.

8. The smelting method for high-titanium, high-sulfur stainless steel according to claim 1, characterized in that: During the reduction period of step b, lime, fluorite, and aluminum ingots are added. The amount of lime added is 12-15 kg / ton, and the ratio of lime to fluorite is 10:

7. The amount of aluminum ingots added is 1.5 kg / ton. Argon gas is blown throughout the process, and the mixture is stirred for 4-6 minutes. When the molten steel is well deoxidized and the slag is yellowish-white or grayish-white, the slag is skimmed off to leave 200-300 kg of slag in the furnace.

9. The smelting method for high-titanium, high-sulfur stainless steel according to claim 8, characterized in that: During the reduction period, the amounts of lime, fluorite, and aluminum ingots added were 14±0.5 kg, 10±0.5 kg, and 1.5±0.1 kg per ton of molten steel, respectively.

10. The smelting method for high-titanium, high-sulfur stainless steel according to claim 1, characterized in that: In step c, the titanium alloy and ferrous sulfate are pre-baked to ensure their surfaces are clean, free of oil and impurities. The titanium alloy and ferrous sulfate are then placed in the ladle, and product B is tapped into the ladle. During the tapping process, a weak argon blowing state is maintained to prevent oxidation of the molten steel. After the molten steel stabilizes in the ladle, lime is added to the ladle, and then the ladle is transferred to the LF furnace.