Method for detecting content of aluminum and aluminum oxide in molten steel melting promoting agent

Abstract

According to the method for detecting the content of the aluminum and the aluminum oxide in the molten steel melting promoting agent, the content of the aluminum and the aluminum oxide in the molten steel melting promoting agent can be accurately and efficiently measured through standard inspection, so that the adding amount during steelmaking is effectively controlled, the production efficiency is improved, and the production cost is reduced. According to the detection method, separation and detection can be realized through step-by-step reaction according to the difference of chemical properties of metal aluminum and aluminum oxide. The method can accurately distinguish the component contents of metal aluminum and aluminum oxide, prevents the situation that element oxides with chemical components similar to those of aluminum oxide cannot be accurately separated, realizes respective detection of the contents of aluminum and aluminum oxide, can accurately control the addition amount of a subsequent molten steel accelerant, and improves the quality of molten steel. The quality influence and the quality loss on the whole furnace of molten steel are reduced.

Description

Technical Field

[0001] This invention relates to the field of steelmaking accelerator testing technology, and in particular to a method for detecting the content of aluminum and aluminum oxide in steelmaking accelerators. Background Technology

[0002] Steelmaking accelerators are mainly used to promote deoxidation, purify steel, and improve its fluidity. Their main components include calcium oxide, silicon dioxide, aluminum, and aluminum oxide. The content of aluminum and aluminum oxide directly affects the proportions of various materials used in the steelmaking process, thus influencing the company's profits and costs.

[0003] In routine inspections, conventional testing methods cannot distinguish the forms in which aluminum exists; they only measure the total aluminum content and cannot separately provide the content of metallic aluminum and aluminum oxide. When testing aluminum oxide content alone, it is impossible to accurately distinguish the proportion of similar elements contained within that content, often resulting in inaccurate test data. This leads to two problems: firstly, it makes it difficult to accurately confirm the settlement price during procurement; secondly, it makes it difficult to accurately control the amount of steel accelerator added.

[0004] If the specific content of metallic aluminum and aluminum oxide in the steelmaking accelerator cannot be accurately detected, the amount added during the steelmaking process may cause fluctuations in the quality of the entire furnace of molten steel, resulting in unnecessary quality losses. Summary of the Invention

[0005] In view of this, the present invention provides a method for detecting the content of aluminum and aluminum oxide in steelmaking accelerators. Through standardized testing, the content of aluminum and aluminum oxide in steelmaking accelerators can be accurately and efficiently determined, thereby effectively controlling the amount added during steelmaking, improving production efficiency and reducing production costs.

[0006] The method for detecting the content of aluminum and aluminum oxide in the steelmaking accelerator of the present invention includes the following steps:

[0007] (1) Crush the steelmaking accelerator sample to a particle size of less than 0.16 mm;

[0008] (2) Determination of metallic Al: Add the sample to ferric ammonium sulfate solution, heat to a gentle boil to completely dissolve the sample, cool to room temperature in the absence of air, then add phosphoric acid and sodium diphenylamine sulfonate solution, titrate with potassium dichromate standard solution until deep purple as the endpoint, record the volume of potassium dichromate standard solution consumed and calculate the aluminum content;

[0009] (3) Preparation of aluminum and titanium detection mother liquor: The sample is added to the mixed additive, wrapped with filter paper, and placed in a porcelain crucible containing graphite powder for high-temperature sintering. After sintering, the sample is taken out and cooled. Then, hydrochloric acid is placed on a low-temperature electric furnace. After white smoke is emitted, the sintered sample is placed in it, heated and dissolved, filtered, and diluted with water to obtain the mother liquor. The mother liquor is used as the analytical sample for the detection of aluminum oxide and titanium dioxide. The mixed additive is a mixture of potassium nitrate, boric acid, and anhydrous sodium carbonate in a mass ratio of 1-2:2-3:2-3.

[0010] (4) Determination of aluminum oxide: Take the mother liquor described in step (3), add EDTA and dilute with water, then add xylenol orange indicator to adjust the solution to yellow, add ammonia to adjust the solution to purple, add hydrochloric acid to adjust the solution to yellow, add acetic acid-sodium acetate buffer solution and heat to boiling, cool and add xylenol orange indicator, titrate with zinc chloride standard solution until the solution just turns wine red, then add 2g sodium fluoride, shake well and heat to boiling on an electric furnace, remove and cool to room temperature, titrate with zinc chloride standard solution until wine red as the endpoint, record the amount of zinc chloride standard solution used, and calculate the total amount of aluminum oxide using bauxite standard sample;

[0011] (5) Determination of titanium dioxide: Add ascorbic acid, diantipyrine methane and hydrochloric acid to the mother liquor, dilute with water and shake well, let stand for 40-50 minutes, and then use water as a reference to measure the extinction at 420 mm of a 721 colorimeter. Calculate the result using bauxite standard.

[0012] Preferably, the method for determining metallic Al in step (2) is as follows:

[0013] Weigh 0.1g of the sample into a 300ml conical flask, add 100ml of ferric ammonium sulfate solution, stopper the flask with a 3-5cm glass tube, place it on a low-temperature hot plate and keep it gently boiling for 30 minutes to completely dissolve the sample. Then seal the flask with a rubber stopper and cool it to room temperature under running water in an air-free environment. Add 10ml of phosphoric acid and 6 drops of sodium diphenylamine sulfonate solution, and titrate with potassium dichromate standard solution until the endpoint is deep purple. Record the volume V of potassium dichromate standard solution consumed.

[0014] The method for calculating the Al content is as follows: (1)

[0015] Al% = 2 0.0333 V 26.98 / 0.1 1000 100% (1).

[0016] Preferably, the preparation method of the ferric ammonium sulfate solution in step (2) is as follows: ferric ammonium sulfate, water and sulfuric acid solution are mixed in a mass-volume ratio of 70g:300ml:70ml, and then diluted with water to a concentration of ferric ammonium sulfate of 7% to obtain the ferric ammonium sulfate solution; the volume ratio of H2SO4 to water in the sulfuric acid solution is 1:1.

[0017] Preferably, the mass concentration of the sodium diphenylamine sulfonate solution in step (2) is 0.2%; and the concentration of the potassium dichromate standard solution is 0.03333 mol / L.

[0018] Preferably, the preparation method of the aluminum-titanium detection mother liquor in step (3) is as follows:

[0019] According to the ratio of 0.2g of sample, 2-3g of mixed additive, and 4-5g of graphite powder, the sample is added to a Φ12.5 medium-speed qualitative filter paper containing the mixed additive, shaken thoroughly, tightened, and placed in a porcelain crucible containing graphite powder. It is then sintered in a high-temperature furnace at 900℃ for 10 minutes. After sintering, the sample is removed and cooled. Then, 100ml of hydrochloric acid is placed in a 200ml beaker and placed on a low-temperature electric furnace at 450℃. After white smoke is emitted, the sintered sample is placed in the beaker and heated for 4-5 minutes until the sample is completely dissolved. After cooling to room temperature, the sample is filtered through a funnel with degreased cotton into a 200ml volumetric flask. The beaker and degreased cotton are washed with water, and the solution is diluted with water to the mark and shaken well to obtain the mother liquor. This mother liquor is used for the detection of aluminum oxide and titanium dioxide.

[0020] More preferably, the mixed solvent in step (3) is a mixture of NaCO3, H2BO4 and KNO3 in a mass ratio of 3:2:1.

[0021] More preferably, the concentration of hydrochloric acid in step (3) is 1:5.

[0022] Preferably, the method for determining aluminum oxide in step (4) is as follows:

[0023] Take 25 ml of the test sample into a 300 ml Erlenmeyer flask, add 20 ml of EDTA, add 50 ml of water, add 3 drops of xylenol orange indicator to adjust to yellow, then adjust the solution to purple with ammonia, then add hydrochloric acid to adjust to yellow, add 12 ml of acetate-sodium acetate buffer solution, heat to boiling and maintain for 5 minutes, remove and cool, add 3 drops of xylenol orange indicator, titrate with zinc chloride standard solution until the solution just turns wine red, add 2 g of sodium fluoride, shake well and heat to boiling on a 2000W electric furnace for 5 minutes, remove and cool to room temperature, titrate with zinc chloride standard solution until wine red as the endpoint, record this number, and calculate the total amount of aluminum oxide using bauxite standard sample;

[0024] The test sample is a bauxite standard sample or an analytical sample.

[0025] The method for calculating the total amount of Al2O3 is as shown in equation (2):

[0026] Total amount of Al2O3% = (AL2O) 3标样含量 +TiO 2标样含量 (×0.638) ÷ standard titration number × sample titration number (2);

[0027] In equation (2), AL2O 3标样含量 ----Al2O3 content in bauxite standard samples

[0028] TiO 2标样含量------ TiO2 content in bauxite standard samples

[0029] 0.638 --- is the conversion factor from TiO2 to Al2O3.

[0030] Standard titration number --- the volume of zinc chloride consumed by the bauxite standard sample

[0031] Sample titration number --- the volume of zinc chloride consumed by the sample being analyzed.

[0032] More preferably, in step (4), the concentration of EDTA is 15 g / L; the volume ratio of ammonia to water in the ammonia solution is 1:1; the mass concentration of xylenol orange indicator is 0.2%; the concentration of hydrochloric acid is 37-38%; the mass-volume ratio of acetic acid, sodium acetate, and water in the acetic acid-sodium acetate buffer solution is 2 mL:60 g:1000 mL; and the concentration of zinc chloride standard solution is 0.0403 mol / L.

[0033] Preferably, the method for determining titanium dioxide in step (5) is as follows:

[0034] Take 5 ml of the test sample into a 50 ml volumetric flask, add 5 ml of 1% ascorbic acid solution, 6 ml of diantipyrine methane, and 12 ml of hydrochloric acid, shake well, dilute with water to the mark, shake well, and let stand for 40 minutes. Using water as a reference, measure the extinction at 420 mm using a 721 colorimeter, and record it as the sample extinction value. Calculate the result using bauxite standard samples. The test sample is a bauxite standard sample or analytical sample.

[0035] The calculation method for the TiO2 content is as shown in equation (3), and the calculation method for the Al2O3 content is as shown in equation (4):

[0036] TiO2% = Standard sample content ÷ Standard sample extinction value × Sample extinction value (3)

[0037] Al2O3 = Total Al2O3% - TiO2% 0.638-Al% 1.889 (4);

[0038] Wherein: Standard sample content ---- TiO2 content in bauxite standard samples

[0039] Extinction value of standard sample ----- Extinction value of TiO2 in bauxite standard sample

[0040] Extinction value of sample ---- Extinction value of TiO2 in the sample being analyzed.

[0041] Compared with the prior art, the present invention has the following beneficial effects:

[0042] This invention provides a method for detecting the content of aluminum and aluminum oxide in steelmaking accelerators. Through standardized testing, the content of aluminum and aluminum oxide in steelmaking accelerators can be accurately and efficiently determined, thereby effectively controlling the amount added during steelmaking, improving production efficiency, and reducing production costs. The detection method of this invention utilizes the differences in the chemical properties of metallic aluminum and aluminum oxide to achieve separation and detection through stepwise reactions. It can accurately distinguish the content of metallic aluminum and aluminum oxide, preventing the inaccurate separation of oxides with similar chemical compositions to aluminum oxide. This allows for separate detection of aluminum and aluminum oxide content, enabling accurate control of the subsequent addition of steelmaking accelerators, reducing the impact on the overall quality of the molten steel and minimizing quality loss. Attached Figure Description

[0043] Figure 1 This is a schematic diagram of the detection process of the steelmaking accelerator in this invention;

[0044] Figure 2 This is a schematic diagram of the preparation process of the mother liquor used for detecting aluminum oxide in this invention;

[0045] Figure 3 This is a schematic diagram of the detection process for detecting aluminum oxide in this invention. Detailed Implementation

[0046] The present invention will be further described below with reference to the embodiments.

[0047] Example 1

[0048] The method for detecting the content of aluminum and aluminum oxide in steelmaking accelerators includes the following steps:

[0049] (1) Crush the steelmaking accelerator sample to a particle size of less than 0.16 mm;

[0050] (2) Weigh 0.1g of the sample into a 300ml conical flask, add 100ml of ferric ammonium sulfate solution, stopper with a 3-5cm glass tube, place on a low-temperature hot plate and keep boiling gently for 30 minutes to completely dissolve the sample, then seal with a rubber stopper, cool to room temperature with running water in an air-free state, add 10ml of phosphoric acid and 6 drops of sodium diphenylamine sulfonate solution, titrate with potassium dichromate standard solution until deep purple as the endpoint, and record the volume V of potassium dichromate standard solution consumed;

[0051] The method for preparing the ferric ammonium sulfate solution is as follows: Weigh 70g of ferric ammonium sulfate and place it in a 500ml beaker, add 300ml of water and 70ml of sulfuric acid (1:1), dissolve, transfer to a 1000ml volumetric flask, dilute with water to the mark, and shake well to obtain the ferric ammonium sulfate solution.

[0052] The sodium diphenylamine sulfonate solution has a mass concentration of 0.2%; the potassium dichromate standard solution has a concentration of 0.3333 mol / L.

[0053] The method for calculating the Al content is as follows: (1)

[0054] Al% = 2 0.0333 V 26.98 / 0.1 1000 100% (1);

[0055] (3) Preparation of mother liquor for aluminum and titanium detection: Weigh 0.2g of sample and add it to filter paper containing 2g of mixed solvent. Shake well, tighten the filter paper, place it in a porcelain crucible containing 5g of graphite powder, and sinter in a high-temperature furnace at 900℃ for 10 minutes. After sintering, take out the sample and cool it. Then put 100ml of hydrochloric acid into a 200ml beaker and place it on a low-temperature electric furnace at 450℃. After white smoke appears, put the sintered sample in and heat it for 5 minutes until the sample is completely dissolved. Remove it and cool it to room temperature. Filter it into a 200ml volumetric flask using a funnel with degreased cotton. Wash the beaker and degreased cotton with water, dilute with water to the mark and shake well to obtain the mother liquor. This mother liquor is used for the detection of aluminum oxide and titanium dioxide.

[0056] The mixed solvent is composed of NaCO3, H2BO4, and KNO3 in a mass ratio of 3:2:1; the concentration of the hydrochloric acid is 38%.

[0057] (4) Determination of aluminum oxide: Take 25 ml of the test sample into a 300 ml Erlenmeyer flask, add 20 ml of EDTA, add 50 ml of water, add 3 drops of xylenol orange indicator to adjust to yellow, then adjust the solution to purple with ammonia, then add hydrochloric acid to adjust to yellow, add 12 ml of acetate-sodium acetate buffer solution, heat to boiling and keep for 5 minutes, remove and cool, add 3 drops of xylenol orange indicator, titrate with zinc chloride standard solution until the solution just turns wine red, add 2 g of sodium fluoride, shake well and heat to boiling on a 2000W electric furnace for 5 minutes, remove and cool to room temperature, titrate with zinc chloride standard solution until wine red as the endpoint, record this number, and calculate the total amount of aluminum oxide using bauxite standard sample;

[0058] The test sample is a bauxite standard sample or an analytical sample; the concentration of the bauxite standard sample is 52%; the analytical sample is the mother liquor obtained in step (3).

[0059] The method for calculating the total amount of Al2O3 is as shown in equation (2):

[0060] Total amount of Al2O3% = (AL2O) 3标样含量 +TiO 2标样含量 (×0.638) ÷ standard titration number × sample titration number (2);

[0061] AL2O 3标样含量 ----Al2O3 content in bauxite standard samples

[0062] TiO 2标样含量------ TiO2 content in bauxite standard samples

[0063] 0.638 --- is the conversion factor from TiO2 to Al2O3.

[0064] Standard titration number --- the volume of zinc chloride consumed by the bauxite standard sample

[0065] Sample titration number --- the volume of zinc chloride consumed by the analyzed sample

[0066] The concentration of EDTA is 15 g / L; the mass concentration of xylenol orange indicator is 0.2%; the volume ratio of ammonia to water in the ammonia solution is 1:1; the concentration of hydrochloric acid is 38%; the mass-volume ratio of acetic acid, sodium acetate, and water in the acetate-sodium acetate buffer solution is 2 mL:60 g:1000 mL; and the concentration of zinc chloride standard solution is 0.0403 mol / L.

[0067] (5) Determination of titanium dioxide: Take 5 ml of the mother liquor from step (3) into a 50 ml volumetric flask, add 5 ml of ascorbic acid solution with a mass concentration of 1%, 6 ml of diantipyrine methane, and 12 ml of hydrochloric acid, shake well, dilute with water to the mark, shake well, and let stand for 40 minutes. Using water as a reference, measure the extinction at 420 mm of a 721 colorimeter and record it as the extinction value of the sample. Calculate the result using bauxite standard.

[0068] The calculation method for the TiO2 content is as shown in equation (3), and the calculation method for the Al2O3 content is as shown in equation (4):

[0069] TiO2% = Standard sample content ÷ Standard sample extinction value × Sample extinction value (3)

[0070] Al2O3 = Total Al2O3% - TiO2% 0.638-Al% 1.889 (4)

[0071] Wherein: Standard sample content ---- TiO2 content in bauxite standard samples

[0072] Extinction value of standard sample ----- Extinction value of TiO2 in bauxite standard sample

[0073] Extinction value of sample ---- Extinction value of TiO2 in the sample being analyzed.

[0074] The contents of aluminum and aluminum oxide in different steelmaking accelerators were detected using the above method, and the results are shown in Table 1:

[0075] Table 1

[0076]

[0077] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A method for detecting the content of aluminum and aluminum oxide in a steelmaking accelerator, characterized in that, Includes the following steps: (1) Crush the steelmaking accelerator sample to a particle size of less than 0.16 mm; (2) Determination of metallic Al: Add the sample to ferric ammonium sulfate solution, heat to a gentle boil to completely dissolve the sample, cool to room temperature in the absence of air, then add phosphoric acid and sodium diphenylamine sulfonate solution, titrate with potassium dichromate standard solution until deep purple as the endpoint, record the volume of potassium dichromate standard solution consumed and calculate the aluminum content; (3) Preparation of aluminum and titanium detection mother liquor: The sample is added to the mixed additives, wrapped with filter paper, and placed in a porcelain crucible containing graphite powder for high-temperature sintering. After sintering, the sample is taken out and cooled. Then, hydrochloric acid is placed on a low-temperature electric furnace. After white smoke is emitted, the sintered sample is placed in it, heated and dissolved, filtered, and diluted with water to obtain the mother liquor. The mother liquor is used as the analytical sample for the detection of aluminum oxide and titanium dioxide. The mixed additives are a mixture of potassium nitrate, boric acid, and anhydrous sodium carbonate in a mass ratio of 1-2:2-3:2-3. (4) Determination of aluminum oxide: Take the mother liquor described in step (3), add EDTA and dilute with water, then add xylenol orange indicator to adjust the solution to yellow, add ammonia to adjust the solution to purple, add hydrochloric acid to adjust the solution to yellow, add acetic acid-sodium acetate buffer solution and heat to boiling, cool and add xylenol orange indicator, titrate with zinc chloride standard solution until the solution just turns wine red, then add 2g sodium fluoride, shake well and heat to boiling on an electric furnace, remove and cool to room temperature, titrate with zinc chloride standard solution until wine red as the endpoint, record the amount of zinc chloride standard solution used, and calculate the total amount of aluminum oxide using bauxite standard sample; (5) Determination of titanium dioxide: Add ascorbic acid, diantipyrine methane and hydrochloric acid to the mother liquor, dilute with water and shake well, let stand for 40-50 minutes, and then use water as a reference to measure the extinction at 420 mm of a 721 colorimeter. Calculate the result using bauxite standard.

2. The method for detecting the content of aluminum and aluminum oxide in the steelmaking accelerator according to claim 1, characterized in that, The method for determining metallic Al in step (2) is as follows: Weigh 0.1g of the sample into a 300ml conical flask, add 100ml of ferric ammonium sulfate solution, stopper the flask with a 3-5cm glass tube, place it on a low-temperature hot plate and keep it gently boiling for 30 minutes to completely dissolve the sample. Then seal the flask with a rubber stopper and cool it to room temperature under running water in an air-free environment. Add 10ml of phosphoric acid and 6 drops of sodium diphenylamine sulfonate solution, and titrate with potassium dichromate standard solution until the endpoint is deep purple. Record the volume V of potassium dichromate standard solution consumed. The method for calculating the Al content is as follows: (1) Al% =2 0.0333 V 26.98 / 0.1 1000 100% (1).

3. The method for detecting the content of aluminum and aluminum oxide in the steelmaking accelerator according to claim 2, characterized in that, The preparation method of the ferric ammonium sulfate solution in step (2) is as follows: ferric ammonium sulfate, water and sulfuric acid solution are mixed in a mass-volume ratio of 70g:300ml:70ml, and then water is added to dilute the ferric ammonium sulfate solution to a concentration of 7% to obtain the ferric ammonium sulfate solution; the volume ratio of H2SO4 to water in the sulfuric acid solution is 1:

1.

4. The method for detecting the content of aluminum and aluminum oxide in the steelmaking accelerator according to claim 2, characterized in that, The mass concentration of the sodium diphenylamine sulfonate solution in step (2) is 0.2%; the concentration of the potassium dichromate standard solution is 0.03333 mol / L.

5. The method for detecting the content of aluminum and aluminum oxide in the steelmaking accelerator according to claim 1, characterized in that, The preparation method of the aluminum-titanium detection mother liquor in step (3) is as follows: According to the ratio of 0.2g of sample, 2-3g of mixed additive, and 4-5g of graphite powder, the sample is added to a Φ12.5 medium-speed qualitative filter paper containing the mixed additive, shaken thoroughly, tightened, and placed in a porcelain crucible containing graphite powder. It is then sintered in a high-temperature furnace at 900℃ for 10 minutes. After sintering, the sample is removed and cooled. Then, 100ml of hydrochloric acid is placed in a 200ml beaker and placed on a low-temperature electric furnace at 450℃. After white smoke is emitted, the sintered sample is placed in the beaker and heated for 4-5 minutes until the sample is completely dissolved. After cooling to room temperature, the sample is filtered through a funnel with degreased cotton into a 200ml volumetric flask. The beaker and degreased cotton are washed with water, and the solution is diluted with water to the mark and shaken well to obtain the mother liquor. This mother liquor is used for the detection of aluminum oxide and titanium dioxide.

6. The method for detecting the content of aluminum and aluminum oxide in the steelmaking accelerator according to claim 5, characterized in that, The mixed solvent in step (3) is a mixture of NaCO3, H2BO4 and KNO3 in a mass ratio of 3:2:

1.

7. The method for detecting the content of aluminum and aluminum oxide in the steelmaking accelerator according to claim 5, characterized in that, The concentration of hydrochloric acid in step (3) is 37-38%.

8. The method for detecting the content of aluminum and aluminum oxide in the steelmaking accelerator according to claim 1, characterized in that, The method for determining aluminum oxide in step (4) is as follows: Take 25 ml of the test sample into a 300 ml Erlenmeyer flask, add 20 ml of EDTA, add 50 ml of water, add 3 drops of xylenol orange indicator to adjust to yellow, then adjust the solution to purple with ammonia, then add hydrochloric acid to adjust to yellow, add 12 ml of acetate-sodium acetate buffer solution, heat to boiling and maintain for 5 minutes, remove and cool, add 3 drops of xylenol orange indicator, titrate with zinc chloride standard solution until the solution just turns wine red, add 2 g of sodium fluoride, shake well and heat to boiling on a 2000W electric furnace for 5 minutes, remove and cool to room temperature, titrate with zinc chloride standard solution until wine red as the endpoint, record this number, and calculate the total amount of aluminum oxide using bauxite standard sample; The test sample is a bauxite standard sample or an analytical sample. The method for calculating the total amount of Al2O3 is as shown in equation (2): Total amount of Al2O3% = (AL2O) 3标样含量 +TiO 2标样含量 (×0.638) ÷ standard titration number × sample titration number (2); In equation (2), AL2O 3标样含量 ----Al2O3 content in bauxite standard samples TiO 2标样含量------ TiO2 content in bauxite standard samples 0.638 --- is the conversion factor from TiO2 to Al2O3. Standard titration number --- the volume of zinc chloride consumed by the bauxite standard sample Sample titration number --- the volume of zinc chloride consumed by the sample being analyzed.

9. The method for detecting the content of aluminum and aluminum oxide in the steelmaking accelerator according to claim 8, characterized in that, In step (4), the concentration of EDTA is 15 g / L; the volume ratio of ammonia to water in the ammonia solution is 1:1; the mass concentration of xylenol orange indicator is 0.2%; the concentration of hydrochloric acid is 37-38%; the mass-volume ratio of acetic acid, sodium acetate, and water in the acetate-sodium acetate buffer solution is 2 mL:60 g:1000 mL; and the concentration of zinc chloride standard solution is 0.0403 mol / L.

10. The method for detecting the content of aluminum and aluminum oxide in the steelmaking accelerator according to claim 1, characterized in that, The method for determining titanium dioxide in step (5) is as follows: Take 5 ml of the test sample into a 50 ml volumetric flask, add 5 ml of 1% ascorbic acid solution, 6 ml of diantipyrine methane, and 12 ml of hydrochloric acid, shake well, dilute with water to the mark, shake well, and let stand for 40 minutes. Using water as a reference, measure the extinction at 420 mm using a 721 colorimeter, and record it as the sample extinction value. Calculate the result using bauxite standard samples. The test sample is a bauxite standard sample or analytical sample. The calculation method for the TiO2 content is as shown in equation (3), and the calculation method for the Al2O3 content is as shown in equation (4): TiO2% = Standard sample content ÷ Standard sample extinction value × Sample extinction value (3) Al2O3 content Al2O3% - TiO2% 0.638 - Al% 1.889 (4); Wherein: Standard sample content ---- TiO2 content in bauxite standard samples Extinction value of standard sample ----- Extinction value of TiO2 in bauxite standard sample Extinction value of sample ---- Extinction value of TiO2 in the sample being analyzed.

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