Ultrasonic vibration assisted large-width copper plate strip continuous extrusion short-process technology

Abstract

The invention relates to an ultrasonic vibration assisted large-width copper plate strip continuous extrusion short-process technology, and belongs to the technical field of metal processing. A copper raw material is subjected to mechanical cleaning and then ultrasonic cleaning, and the surface cleanliness of the raw material is guaranteed; the cleaned copper raw materials are fed into continuous extrusion equipment, and ultrasonic vibration is adopted for assisting continuous extrusion; after the extruded copper plate strip is cooled, spraying a suspension containing cerium (IV)-sodium dodecyl benzene sulfonate-pyrrolidone nano aluminum oxide additive on the surface of the copper plate strip, and drying; straightening by using a multi-roll straightening machine to obtain a large-width copper plate strip; the cerium (IV)-sodium dodecyl benzene sulfonate-pyrrolidone nanometer aluminum oxide auxiliary agent is prepared from nanometer aluminum oxide, DMF (Dimethyl Formamide), sodium dodecyl benzene sulfonate, N-vinyl pyrrolidone, ammonium persulfate and cerous sulfate (IV); the copper plate strip prepared by the invention has relatively high density, relatively high tensile strength and ductility, and the mechanical property of the copper plate strip is remarkably improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of metal processing, and particularly relates to an ultrasonic vibration assisted large-width copper plate strip continuous extrusion short process. BACKGROUND

[0002] In modern industry, copper plate strips are widely used in the fields of electronics, electric power, communication and building as an important metal material. With the rapid development of related industries, the demand for large-width and high-quality copper plate strips is increasing.

[0003] Chinese patent CN111519064B discloses a manufacturing method of ultra-thin electronic-grade copper plate strips based on the field of metal processing, which comprises the following steps: raw material preparation, melting, stirring, casting, rough rolling, annealing, pickling, finish rolling, and cutting of the copper plate strip product by using a slitting machine. The slitting machine comprises a feeding rack, two groups of unwinding devices symmetrically arranged on the feeding rack, a cutting device arranged on one side of the feeding rack, and a winding device arranged on one side of the cutting device.

[0004] Chinese patent CN108393369B discloses a copper plate strip processing technology for terminals, which is prepared by the following steps: S1, preparing raw material A and raw material B respectively; S2, melting; S3, adding a refining agent and maintaining the temperature at 1080 DEG C for 1-2 hours; S4, adding raw material B and maintaining the temperature at 1080 DEG C for 1-2 hours; S5, adding a lubricant for casting; S6, removing the surface oxide skin and slag of the cast product; S7, hot rolling to obtain a copper strip with a thickness of 4.0 mm; S8, rough rolling the copper strip with a thickness of 4.0 mm to obtain a copper strip with a thickness of 1.9 mm; and S9, finish rolling the copper strip with a thickness of 1.9 mm to obtain a finished copper plate strip.

[0005] Continuous extrusion process, as an efficient metal processing method, is gradually applied in the production of copper plate strips. However, the existing continuous extrusion process also has some problems in the production of large-width copper plate strips. On the one hand, with the increase of the width of the plate, the friction between the blank and the die increases, which leads to the increase of the extrusion force, and easily causes the aggravation of die wear, the shortening of service life, and the increase of the load and energy consumption of the equipment; on the other hand, the metal flow of the large-width blank is not uniform during the extrusion process, which easily causes the thickness deviation of the plate and the poor surface quality, and limits the further improvement of the product quality. SUMMARY

[0006] In order to solve the above problems, the present application provides an ultrasonic vibration assisted large-width copper plate strip continuous extrusion short process, and the operation steps are as follows:

[0007] S1 raw material pretreatment: the copper raw material with a purity of 99.95% is first cleaned mechanically to remove large surface particles, and then placed in an ultrasonic cleaning tank to thoroughly remove surface oil and small impurities, ensuring the cleanliness of the raw material surface;

[0008] S2 ultrasonic vibration assisted continuous extrusion: the cleaned copper raw material is sent to a continuous extrusion device for ultrasonic vibration assisted continuous extrusion;

[0009] S3 subsequent treatment: after the copper plate strip is cooled, 1-3 parts of a suspension containing 10-15 wt% of cerium(IV)-sodium dodecyl benzene sulfonate-pyrrolidone nano-alumina additives are sprayed on the surface of 70-100 parts of the copper plate strip, and then dried; and a multi-roll straightening machine is used for straightening to obtain a large-width copper plate strip.

[0010] Further, the cleaning solution in the S1 ultrasonic cleaning tank is a sodium bicarbonate solution containing 0.5-2 wt% of sodium dodecyl sulfate; and the mass percentage of the sodium bicarbonate solution is 2-5%.

[0011] Further, the ultrasonic frequency of the S1 ultrasonic cleaning tank is 25-30 kHz, the temperature is 35-40℃, and the cleaning time is 10-15 min.

[0012] Further, the frequency of the S2 ultrasonic vibration is 20-25 kHz, and the amplitude is 15-20 μm.

[0013] Further, the extrusion temperature of S2 is 600-620℃, and the extrusion speed is 1.5-2 m / min.

[0014] Further, the preparation method of the cerium(IV)-sodium dodecyl benzene sulfonate-pyrrolidone nano-alumina additive is as follows:

[0015] 10-15 parts of nano-alumina are added to 100-150 parts of DMF for ultrasonic dispersion for 30-60 min; 5-8 parts of sodium dodecyl benzene sulfonate are added, and the reaction is carried out at a temperature of 70-80℃ for 60-120 min; then 8-12 parts of N-vinyl pyrrolidone, 1-4 parts of ammonium persulfate, and 0.06-0.1 parts of cerium(IV) sulfate are added, and the polymerization reaction is carried out at a temperature of 80-90℃ for 4-6 h; after the reaction is completed, the DMF is distilled off to obtain the cerium(IV)-sodium dodecyl benzene sulfonate-pyrrolidone nano-alumina additive.

[0016] Reaction mechanism:

[0017] Sodium dodecylbenzenesulfonate modifies the surface of nano-alumina through adsorption, improving its dispersibility; N-vinylpyrrolidone undergoes polymerization to form a polymer coating layer, and cerium ions coordinate with related groups, further enhancing the stability and lubrication effect of the additive during processing.

[0018] Technical effects:

[0019] The present invention provides a short-process continuous extrusion process for wide copper strips assisted by ultrasonic vibration. Compared with the prior art, the present invention has the following significant advantages:

[0020] The addition of the cerium(IV)-dodecylbenzenesulfonate sodium-pyrrolidone nano-alumina additive prepared in this invention improves the density of the copper strip processed by ultrasonic vibration, and significantly enhances its mechanical properties such as tensile strength and elongation. Detailed Implementation

[0021] To further illustrate the technical means and effects adopted by the present invention to achieve the intended purpose, the following detailed description is provided in conjunction with embodiments and comparative examples:

[0022] 1. Density: Tested using the water displacement method.

[0023] 2. Tensile strength and elongation: tested using a universal testing machine.

[0024] Example 1

[0025] A short-process continuous extrusion technology for wide copper strips assisted by ultrasonic vibration, comprising the following steps:

[0026] S1 Raw Material Pretreatment: The copper raw material with a purity of 99.95% is first mechanically cleaned to remove larger particles of impurities from the surface. Then, the copper raw material is placed in an ultrasonic cleaning tank to thoroughly remove surface oil and tiny impurities, ensuring the cleanliness of the raw material surface.

[0027] S2 Ultrasonic Vibration Assisted Continuous Extrusion: The cleaned copper raw material is fed into a continuous extrusion equipment and ultrasonic vibration is used to assist continuous extrusion.

[0028] S3 Post-processing: After the extruded copper strip is cooled, a suspension of 1 kg containing 10 wt% cerium(IV)-dodecylbenzenesulfonate-pyrrolidone nano-alumina additive is sprayed onto the surface of 70 kg of copper strip and dried; then straightened with a multi-roll straightener to obtain a wide copper strip.

[0029] The cleaning solution in the S1 ultrasonic cleaning tank is a sodium bicarbonate solution containing 0.5 wt% sodium dodecyl sulfate; wherein the mass percentage of the sodium bicarbonate solution is 2%.

[0030] The ultrasonic cleaning tank described in S1 has an ultrasonic frequency of 25kHz, a temperature of 35℃, and a cleaning time of 10min.

[0031] The frequency of the S2 ultrasonic vibration is 20kHz and the amplitude is 15μm.

[0032] The S2 extrusion temperature is 600℃ and the extrusion speed is 1.5m / min.

[0033] The preparation method of the cerium(IV)-dodecylbenzenesulfonate-pyrrolidone nano-alumina additive is as follows:

[0034] 10 kg of nano-alumina was added to 100 kg of DMF and ultrasonically dispersed for 30 min; 5 kg of sodium dodecylbenzenesulfonate was added and reacted at 70 °C for 60 min; then 8 kg of N-vinylpyrrolidone, 1 kg of ammonium persulfate, and 0.06 kg of cerium(IV) sulfate were added, and the temperature was raised to 80 °C for polymerization reaction for 4 h. After the reaction was completed, DMF was removed by distillation to obtain cerium(IV)-sodium dodecylbenzenesulfonate-pyrrolidone nano-alumina additive.

[0035] Example 2

[0036] A short-process continuous extrusion technology for wide copper strips assisted by ultrasonic vibration, comprising the following steps:

[0037] S1 Raw Material Pretreatment: The copper raw material with a purity of 99.95% is first mechanically cleaned to remove larger particles of impurities from the surface. Then, the copper raw material is placed in an ultrasonic cleaning tank to thoroughly remove surface oil and tiny impurities, ensuring the cleanliness of the raw material surface.

[0038] S2 Ultrasonic Vibration Assisted Continuous Extrusion: The cleaned copper raw material is fed into a continuous extrusion equipment and ultrasonic vibration is used to assist continuous extrusion.

[0039] S3 Post-processing: After the extruded copper strip is cooled, a suspension of 2 kg containing 12 wt% cerium(IV)-dodecylbenzenesulfonate-pyrrolidone nano-alumina additive is sprayed onto the surface of 80 kg of copper strip and dried; then straightened with a multi-roll straightener to obtain a wide copper strip.

[0040] The cleaning solution in the S1 ultrasonic cleaning tank is a sodium bicarbonate solution containing 1 wt% sodium dodecyl sulfate; wherein the mass percentage of the sodium bicarbonate solution is 3%.

[0041] The ultrasonic cleaning tank described in S1 has an ultrasonic frequency of 25kHz, a temperature of 35℃, and a cleaning time of 10min.

[0042] The frequency of the S2 ultrasonic vibration is 20kHz and the amplitude is 15μm.

[0043] The S2 extrusion temperature is 610℃ and the extrusion speed is 1.6m / min.

[0044] The preparation method of the cerium(IV)-dodecylbenzenesulfonate-pyrrolidone nano-alumina additive is as follows:

[0045] 12 kg of nano-alumina was added to 110 kg of DMF and ultrasonically dispersed for 40 min; 6 kg of sodium dodecylbenzenesulfonate was added and reacted at 75 °C for 80 min; then 9 kg of N-vinylpyrrolidone, 2 kg of ammonium persulfate, and 0.07 kg of cerium(IV) sulfate were added, and the temperature was raised to 85 °C for polymerization reaction for 5 h. After the reaction was completed, DMF was removed by distillation to obtain cerium(IV)-sodium dodecylbenzenesulfonate-pyrrolidone nano-alumina additive.

[0046] Example 3

[0047] A short-process continuous extrusion technology for wide copper strips assisted by ultrasonic vibration, comprising the following steps:

[0048] S1 Raw Material Pretreatment: The copper raw material with a purity of 99.95% is first mechanically cleaned to remove larger particles of impurities from the surface. Then, the copper raw material is placed in an ultrasonic cleaning tank to thoroughly remove surface oil and tiny impurities, ensuring the cleanliness of the raw material surface.

[0049] S2 Ultrasonic Vibration Assisted Continuous Extrusion: The cleaned copper raw material is fed into a continuous extrusion equipment and ultrasonic vibration is used to assist continuous extrusion.

[0050] S3 Post-processing: After the extruded copper strip is cooled, a suspension of 2 kg containing 14 wt% cerium(IV)-dodecylbenzenesulfonate-pyrrolidone nano-alumina additive is sprayed onto the surface of 90 kg of copper strip and dried; then straightened with a multi-roll straightener to obtain a wide copper strip.

[0051] The cleaning solution in the S1 ultrasonic cleaning tank is a sodium bicarbonate solution containing 1.5 wt% sodium dodecyl sulfate; wherein the mass percentage of the sodium bicarbonate solution is 4%.

[0052] The S1 ultrasonic cleaning tank has an ultrasonic frequency of 30kHz, a temperature of 40℃, and a cleaning time of 15min.

[0053] The frequency of the S2 ultrasonic vibration is 25kHz and the amplitude is 20μm.

[0054] The S2 extrusion temperature is 610℃ and the extrusion speed is 1.8m / min.

[0055] The preparation method of the cerium(IV)-dodecylbenzenesulfonate-pyrrolidone nano-alumina additive is as follows:

[0056] 14 kg of nano-alumina was added to 140 kg of DMF and ultrasonically dispersed for 50 min; 7 kg of sodium dodecylbenzenesulfonate was added and reacted at 75 °C for 100 min; then 11 kg of N-vinylpyrrolidone, 3 kg of ammonium persulfate, and 0.09 kg of cerium(IV) sulfate were added, and the temperature was raised to 85 °C for polymerization reaction for 5 h. After the reaction was completed, DMF was removed by distillation to obtain cerium(IV)-sodium dodecylbenzenesulfonate-pyrrolidone nano-alumina additive.

[0057] Example 4

[0058] A short-process continuous extrusion technology for wide copper strips assisted by ultrasonic vibration, comprising the following steps:

[0059] S1 Raw Material Pretreatment: The copper raw material with a purity of 99.95% is first mechanically cleaned to remove larger particles of impurities from the surface. Then, the copper raw material is placed in an ultrasonic cleaning tank to thoroughly remove surface oil and tiny impurities, ensuring the cleanliness of the raw material surface.

[0060] S2 Ultrasonic Vibration Assisted Continuous Extrusion: The cleaned copper raw material is fed into a continuous extrusion equipment and ultrasonic vibration is used to assist continuous extrusion.

[0061] S3 Post-processing: After the extruded copper strip is cooled, a suspension of 3 kg containing 15 wt% cerium(IV)-dodecylbenzenesulfonate-pyrrolidone nano-alumina additive is sprayed onto the surface of 100 kg of copper strip and dried; then straightened with a multi-roll straightener to obtain a wide copper strip.

[0062] The cleaning solution in the S1 ultrasonic cleaning tank is a sodium bicarbonate solution containing 2 wt% sodium dodecyl sulfate; wherein the mass percentage of the sodium bicarbonate solution is 5%.

[0063] The S1 ultrasonic cleaning tank has an ultrasonic frequency of 30kHz, a temperature of 40℃, and a cleaning time of 15min.

[0064] The frequency of the S2 ultrasonic vibration is 25kHz and the amplitude is 20μm.

[0065] The S2 extrusion temperature is 620℃ and the extrusion speed is 2m / min.

[0066] The preparation method of the cerium(IV)-dodecylbenzenesulfonate-pyrrolidone nano-alumina additive is as follows:

[0067] 15 kg of nano-alumina was added to 150 kg of DMF and ultrasonically dispersed for 60 min; 8 kg of sodium dodecylbenzenesulfonate was added and reacted at 80 °C for 120 min; then 12 kg of N-vinylpyrrolidone, 4 kg of ammonium persulfate, and 0.1 kg of cerium(IV) sulfate were added, and the temperature was raised to 90 °C for polymerization reaction for 6 h. After the reaction was completed, DMF was removed by distillation to obtain cerium(IV)-sodium dodecylbenzenesulfonate-pyrrolidone nano-alumina additive.

[0068] Comparative Example 1

[0069] A short-process continuous extrusion technology for wide copper strips assisted by ultrasonic vibration, comprising the following steps:

[0070] S1 Raw Material Pretreatment: The copper raw material with a purity of 99.95% is first mechanically cleaned to remove larger particles of impurities from the surface. Then, the copper raw material is placed in an ultrasonic cleaning tank to thoroughly remove surface oil and tiny impurities, ensuring the cleanliness of the raw material surface.

[0071] S2 Ultrasonic Vibration Assisted Continuous Extrusion: The cleaned copper raw material is fed into a continuous extrusion equipment and ultrasonic vibration is used to assist continuous extrusion.

[0072] S3 Post-processing: After the extruded copper strip is cooled, it is straightened by a multi-roll straightener to obtain a wide copper strip.

[0073] The cleaning solution in the S1 ultrasonic cleaning tank is a sodium bicarbonate solution containing 0.5 wt% sodium dodecyl sulfate; wherein the mass percentage of the sodium bicarbonate solution is 2%.

[0074] The ultrasonic cleaning tank described in S1 has an ultrasonic frequency of 25kHz, a temperature of 35℃, and a cleaning time of 10min.

[0075] The frequency of the S2 ultrasonic vibration is 20kHz and the amplitude is 15μm.

[0076] The S2 extrusion temperature is 600℃ and the extrusion speed is 1.5m / min.

[0077] Comparative Example 2

[0078] A short-process continuous extrusion technology for wide copper strips assisted by ultrasonic vibration, comprising the following steps:

[0079] S1 Raw Material Pretreatment: The copper raw material with a purity of 99.95% is first mechanically cleaned to remove larger particles of impurities from the surface. Then, the copper raw material is placed in an ultrasonic cleaning tank to thoroughly remove surface oil and tiny impurities, ensuring the cleanliness of the raw material surface.

[0080] S2 Ultrasonic Vibration Assisted Continuous Extrusion: The cleaned copper raw material is fed into a continuous extrusion equipment and ultrasonic vibration is used to assist continuous extrusion.

[0081] S3 Post-processing: After the extruded copper strip is cooled, a suspension containing 1 kg of 10 wt% additives is sprayed onto the surface of 70 kg of copper strip and dried; then it is straightened with a multi-roll straightener to obtain a wide copper strip.

[0082] The cleaning solution in the S1 ultrasonic cleaning tank is a sodium bicarbonate solution containing 0.5 wt% sodium dodecyl sulfate; wherein the mass percentage of the sodium bicarbonate solution is 2%.

[0083] The ultrasonic cleaning tank described in S1 has an ultrasonic frequency of 25kHz, a temperature of 35℃, and a cleaning time of 10min.

[0084] The frequency of the S2 ultrasonic vibration is 20kHz and the amplitude is 15μm.

[0085] The S2 extrusion temperature is 600℃ and the extrusion speed is 1.5m / min.

[0086] The preparation method of the aforementioned auxiliary agent is as follows:

[0087] 10 kg of nano-alumina was added to 100 kg of DMF and ultrasonically dispersed for 30 min. Then, 8 kg of N-vinylpyrrolidone, 1 kg of ammonium persulfate, and 0.06 kg of cerium sulfate (IV) were added, and the mixture was heated to 80 °C for 4 h to carry out a polymerization reaction. After the reaction was completed, DMF was removed by distillation to obtain the additive.

[0088] Comparative Example 3

[0089] A short-process continuous extrusion technology for wide copper strips assisted by ultrasonic vibration, comprising the following steps:

[0090] S1 Raw Material Pretreatment: The copper raw material with a purity of 99.95% is first mechanically cleaned to remove larger particles of impurities from the surface. Then, the copper raw material is placed in an ultrasonic cleaning tank to thoroughly remove surface oil and tiny impurities, ensuring the cleanliness of the raw material surface.

[0091] S2 Ultrasonic Vibration Assisted Continuous Extrusion: The cleaned copper raw material is fed into a continuous extrusion equipment and ultrasonic vibration is used to assist continuous extrusion.

[0092] S3 Post-processing: After the extruded copper strip is cooled, a suspension containing 1 kg of 10 wt% additives is sprayed onto the surface of 70 kg of copper strip and dried; then it is straightened with a multi-roll straightener to obtain a wide copper strip.

[0093] The cleaning solution in the S1 ultrasonic cleaning tank is a sodium bicarbonate solution containing 0.5 wt% sodium dodecyl sulfate; wherein the mass percentage of the sodium bicarbonate solution is 2%.

[0094] The ultrasonic cleaning tank described in S1 has an ultrasonic frequency of 25kHz, a temperature of 35℃, and a cleaning time of 10min.

[0095] The frequency of the S2 ultrasonic vibration is 20kHz and the amplitude is 15μm.

[0096] The S2 extrusion temperature is 600℃ and the extrusion speed is 1.5m / min.

[0097] The preparation method of the aforementioned auxiliary agent is as follows:

[0098] 10 kg of nano-alumina was added to 100 kg of DMF and ultrasonically dispersed for 30 min; 5 kg of sodium dodecylbenzenesulfonate was added and reacted at 70 °C for 60 min; then 8 kg of N-vinylpyrrolidone and 1 kg of ammonium persulfate were added, and the temperature was raised to 80 °C for polymerization reaction for 4 h. After the reaction was completed, DMF was removed by distillation to obtain the additive.

[0099] Table 1: Test Results of Examples and Comparative Examples

[0100] Density (%) Tensile strength (MPa) Elongation (%) Example 1 99.93 292.1 40.2 Example 2 99.95 294.3 40.4 Example 3 99.98 297.8 40.8 Example 4 99.99 300.5 41.1 Comparative Example 1 96.25 217.6 30.6 Comparative Example 2 98.34 260.9 35.5 Comparative Example 3 99.12 266.4 36.7

[0101] Based on the data analysis of the above embodiments and comparative examples, the copper strip prepared by the present invention has high density, high tensile strength and elongation, and its mechanical properties have been significantly improved.

[0102] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A short-process continuous extrusion technology for wide copper strips assisted by ultrasonic vibration, characterized in that: The operating steps are as follows: S1 Raw Material Pretreatment: The copper raw material with a purity of 99.95% is first mechanically cleaned to remove larger particles of impurities from the surface. Then, the copper raw material is placed in an ultrasonic cleaning tank to thoroughly remove surface oil and tiny impurities, ensuring the cleanliness of the raw material surface. S2 Ultrasonic Vibration Assisted Continuous Extrusion: The cleaned copper raw material is fed into a continuous extrusion equipment and ultrasonic vibration is used to assist continuous extrusion. S3 Post-processing: After the extruded copper strip is cooled, a suspension containing 1-3 parts of cerium(IV)-dodecylbenzenesulfonate-pyrrolidone nano alumina additive is sprayed onto the surface of 70-100 parts of copper strip and dried. Then, a multi-roll straightener is used to straighten the copper strip to obtain a wide strip. The cerium(IV)-dodecylbenzenesulfonate-pyrrolidone nano-alumina additive is prepared by reacting nano-alumina, sodium dodecylbenzenesulfonate, N-vinylpyrrolidone, ammonium persulfate, and cerium(IV) sulfate.

2. The ultrasonic vibration-assisted continuous extrusion short-process technology for wide copper strips according to claim 1, characterized in that: The cleaning solution in the S1 ultrasonic cleaning tank is a sodium bicarbonate solution containing 0.5-2 wt% sodium dodecyl sulfate; wherein the mass percentage of the sodium bicarbonate solution is 2-5%.

3. The ultrasonic vibration-assisted continuous extrusion short-process technology for wide copper strips according to claim 1, characterized in that: The ultrasonic cleaning tank described in S1 has an ultrasonic frequency of 25-30kHz, a temperature of 35-40℃, and a cleaning time of 10-15min.

4. The ultrasonic vibration-assisted continuous extrusion short-process technology for wide copper strips according to claim 1, characterized in that: The frequency of the S2 ultrasonic vibration is 20-25kHz, and the amplitude is 15-20μm.

5. The ultrasonic vibration-assisted continuous extrusion short-process technology for wide copper strips according to claim 1, characterized in that: The S2 extrusion temperature is 600-620℃, and the extrusion speed is 1.5-2m / min.

6. The ultrasonic vibration-assisted continuous extrusion short-process technology for wide copper strips according to claim 1, characterized in that: The preparation method of the cerium(IV)-dodecylbenzenesulfonate-pyrrolidone nano-alumina additive is as follows: Add 10-15 parts of nano-alumina to 100-150 parts of DMF and ultrasonically disperse for 30-60 minutes; Add 5-8 parts of sodium dodecylbenzenesulfonate and react at 70-80℃ for 60-120 min; then add 8-12 parts of N-vinylpyrrolidone, 1-4 parts of ammonium persulfate, and 0.06-0.1 parts of cerium(IV) sulfate, and heat to 80-90℃ for polymerization reaction for 4-6 h. After the reaction is completed, remove DMF by distillation to obtain cerium(IV)-sodium dodecylbenzenesulfonate-pyrrolidone nano alumina additive.