A short process for manufacturing high-performance phosphor copper balls by using scrap copper

Abstract

The present application relates to a kind of short process technology for manufacturing high-performance phosphor copper ball by waste copper, belong to non-ferrous metal processing technical field.Waste copper is sorted, broken, soaked, paint removal, impurity removal and then added to medium-frequency induction melting furnace, and refining agent is added for refining;Phosphor copper alloy is slowly added to the copper liquid after refining;After adding phosphor copper alloy, the copper liquid is introduced into the upper continuous casting equipment, and the copper liquid is cooled and solidified in crystallizer, and phosphor copper ball blank is directly drawn;Phosphor copper ball blank is placed in annealing furnace, and annealing is carried out;Then it is cooled by polyetheramine-bisphenol A epoxy cooling liquid;Mechanical polishing, ultrasonic cleaning obtain high-performance phosphor copper ball;Polyetheramine-bisphenol A epoxy cooling liquid is prepared by polyetheramine, bisphenol A epoxy resin, ethylene glycol butyl ether, 2,5-dimercapto hydroquinone, dibutyl tin dilaurate, deionized water, triethylamine, graphene microsheet;Phosphor copper ball has high hardness and electrical conductivity, and is a kind of high-performance phosphor copper ball.

Description

Technical Field

[0001] This invention relates to the field of non-ferrous metal processing technology, and in particular to a short-process technology for manufacturing high-performance phosphor bronze balls using scrap copper. Background Technology

[0002] Phosphor bronze balls are widely used as a key raw material in many fields such as electronics, electrical engineering, and machinery manufacturing, particularly in electroplating and brazing processes. Traditional phosphor bronze ball production relies primarily on high-purity electrolytic copper as raw material. However, with the increasing scarcity and rising price of copper resources, this production method faces the serious challenge of high costs. At the same time, the lack of efficient recycling methods for large quantities of scrap copper not only results in significant resource waste but also poses a potential threat to the environment.

[0003] Chinese Patent CN112935718A discloses a method for processing phosphor bronze balls and its production equipment, including the following steps: Step 1, pre-forming of round copper rods: The user uses a continuous casting method to cast and shape the round copper rod raw material. The round copper rod raw material is pre-melted, and then the upper mold is attached to the surface of the lower mold. The upper mold and the lower mold are sealed and fixed with bolts. Then, the molten round copper rod raw material is injected into the mold cavity of the upper and lower molds. After a period of physical cooling, the round copper rod formed product is obtained.

[0004] Chinese Patent CN118417893A discloses a phosphor bronze ball production line, including a ball-forming production line, a material collection mechanism, a grinding mechanism, a cleaning mechanism, a drying mechanism, a weighing mechanism, a box-sealing and coding mechanism, and a stacking mechanism. The ball-forming production line consists of a ball-forming collection conveyor belt and several ball-forming units. Each ball-forming unit includes a feeding tray, a straightening machine, and a ball-forming machine. Phosphor bronze material is wound on the feeding tray. After being straightened by the straightening machine, the phosphor bronze material on the feeding tray enters the ball-forming machine for ball-forming. A first material collection trough is provided at the outlet of the ball-forming machine. The phosphor bronze balls formed by the ball-forming machine fall onto a first lifting conveyor via the first material collection trough. The phosphor bronze balls falling onto the first lifting conveyor are lifted by the first lifting conveyor onto the ball-forming collection conveyor belt.

[0005] Currently, some companies are attempting to use scrap copper to produce phosphor bronze balls, but existing processes generally suffer from lengthy and complex procedures. These typically involve multiple cumbersome steps, such as repeated smelting, refining, lengthy purification processes, and complex molding, which not only leads to low production efficiency but also consumes a large amount of energy, further increasing production costs. Summary of the Invention

[0006] To address the above problems, this invention provides a short-process technology for manufacturing high-performance phosphor bronze balls using scrap copper, the operation steps of which are as follows:

[0007] S1 Scrap Copper Pretreatment: The scrap copper is first manually sorted to remove large impurities; then it is fed into a crusher for crushing to a particle size of 5-10mm; next, it is soaked in a special degreasing agent for 15-30 minutes to ensure that the oil on the surface of the scrap copper is completely removed; for scrap copper with a paint layer on the surface, a paint remover is used for paint removal; then, magnetic impurities are removed by magnetic separation equipment; and finally, non-metallic impurities are removed by flotation.

[0008] S2 Smelting and Refining: 70-90 parts by weight of pretreated scrap copper are added to a medium-frequency induction smelting furnace and heated for smelting; during the smelting process, 0.5-2 parts by weight of refining agent are added to the furnace. The refining agent reacts chemically with the gas and impurities in the copper liquid to form slag that floats on the surface of the copper liquid, thereby achieving the purpose of removing impurities.

[0009] S3 Phosphorus Copper Alloy Addition: Slowly add 21-27 parts by weight of phosphorus copper alloy to 800-1000 parts by weight of refined copper liquid, stir for 15-30 minutes to ensure that the phosphorus copper alloy can be quickly and evenly dissolved in the copper liquid, so that the phosphorus element can be evenly distributed in the copper liquid.

[0010] S4 forming: The copper liquid with added phosphorus copper alloy is introduced into the upper continuous casting equipment, so that the copper liquid cools and solidifies in the crystallizer and is directly cast into phosphorus copper ball billets.

[0011] S5 post-processing: The phosphor bronze ball blank is placed in an annealing furnace for annealing; then cooled with polyetheramine-bisphenol A epoxy coolant; polished by mechanical polishing; and finally cleaned with ultrasonic cleaning equipment for 10-20 minutes to obtain high-performance phosphor bronze balls.

[0012] Preferably, the special degreasing agent is one of sodium hydroxide, sodium carbonate, sodium silicate, sodium phosphate, citric acid, and oxalic acid.

[0013] Preferably, the paint remover is one of nitric acid, sulfuric acid, or hydrochloric acid.

[0014] Preferably, the refining agent is borax and soda ash in a mass ratio of 2:1.

[0015] Preferably, the melting temperature of S2 is 1100-1300℃, and the refining time is 15-30 minutes.

[0016] Preferably, the phosphorus content in the phosphorus-copper alloy is 15 wt%.

[0017] Preferably, the casting speed of S4 is 3-5 m / min.

[0018] Preferably, the S5 annealing temperature is 400-600℃ and the time is 1-3 hours.

[0019] Preferably, the preparation method of the polyetheramine-bisphenol A epoxy coolant is as follows:

[0020] Mix 6-9 parts of polyetheramine, 4-6 parts of bisphenol A epoxy resin, 42-56 parts of ethylene glycol butyl ether, and 0.03-0.3 parts of 2,5-dimercaptohydroquinone. Add 0.2-0.5 parts of dibutyltin dilaurate and 130-170 parts of deionized water. React at 70-80℃ for 5-6 hours. After cooling to room temperature, add 1-4 parts of triethylamine and 0.8-1.2 parts of graphene microsheets. Disperse by ultrasonication for 25-60 minutes to obtain polyetheramine-bisphenol A epoxy cooling solution.

[0021] Reaction mechanism:

[0022] The amino group of polyetheramine and the epoxy group of bisphenol A epoxy resin undergo an addition reaction under the catalysis of dibutyltin dilaurate to generate a flexible polyether-epoxy copolymer.

[0023] Hydroquinone is grafted onto the copolymer chain via thiol groups. The phenolic hydroxyl groups reduce the oxidation intermediates on the copper surface, while the amine groups enhance the adsorption on the copper surface. The resulting composite film isolates oxygen and moisture, inhibiting oxidation.

[0024] Technical effects:

[0025] This invention provides a short-process technology for manufacturing high-performance phosphor bronze balls using scrap copper. Compared with existing technologies, this invention has the following significant advantages:

[0026] 1. The flexible segments of the copolymer reduce the thermal stress of the copper rod, and the compounded antioxidants help the copper rod resist oxidation in various environments, prevent the appearance of black spots, and ensure the mechanical properties of the copper rod.

[0027] 2. Graphene microsheets form a heat-conducting network, improving cooling efficiency, and the copper rod has a good surface condition, meeting the requirements of subsequent processing. Detailed Implementation

[0028] 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:

[0029] 1. Phosphorus content: Detected using photoelectric emission spectrometer.

[0030] 2. Hardness: Tested using a Vickers hardness tester.

[0031] 3. Conductivity: Measured using an eddy current conductivity meter.

[0032] Example 1

[0033] A short-process technology for manufacturing high-performance phosphor bronze balls using scrap copper, comprising the following steps:

[0034] S1 Scrap Copper Pretreatment: The scrap copper is first manually sorted to remove large impurities; then it is fed into a crusher for crushing to a particle size of 10mm; next, it is soaked in a special degreasing agent for 15 minutes to ensure that the oil on the surface of the scrap copper is completely removed; for scrap copper with a paint layer on the surface, a paint remover is used for paint removal; then, magnetic impurities are removed by magnetic separation equipment; and finally, non-metallic impurities are removed by flotation.

[0035] S2 Smelting and Refining: 70kg of pre-treated scrap copper is added to a medium-frequency induction smelting furnace and heated for smelting; during the smelting process, 0.5kg of refining agent is added to the furnace. The refining agent reacts chemically with the gas and impurities in the copper liquid to form slag that floats on the surface of the copper liquid, thereby achieving the purpose of removing impurities.

[0036] S3 Phosphorus Copper Alloy Addition: Slowly add 21kg of phosphorus copper alloy to 800kg of refined copper liquid and stir for 15 minutes to ensure that the phosphorus copper alloy can dissolve quickly and evenly in the copper liquid, so that the phosphorus element can be evenly distributed in the copper liquid.

[0037] S4 forming: The copper liquid with added phosphorus copper alloy is introduced into the upper continuous casting equipment, so that the copper liquid cools and solidifies in the crystallizer and is directly cast into phosphorus copper ball billets.

[0038] S5 post-processing: The phosphor bronze ball blank is placed in an annealing furnace for annealing; then cooled with polyetheramine-bisphenol A epoxy coolant; polished by mechanical polishing; and finally cleaned with ultrasonic cleaning equipment for 10 minutes to obtain high-performance phosphor bronze balls.

[0039] The special degreasing agent mentioned is sodium hydroxide.

[0040] The paint remover mentioned is nitric acid.

[0041] The refining agent is borax and soda ash in a mass ratio of 2:1.

[0042] The S2 melting temperature is 1100℃ and the refining time is 15 minutes.

[0043] The phosphorus content in the aforementioned phosphorus-copper alloy is 15 wt%.

[0044] The casting speed of S4 is 3 m / min.

[0045] The S5 annealing temperature is 400℃ and the time is 1 hour.

[0046] The preparation method of the polyetheramine-bisphenol A epoxy coolant is as follows:

[0047] 6 kg of polyetheramine D230, 4 kg of bisphenol A epoxy resin E51, 42 kg of ethylene glycol butyl ether, and 0.03 kg of 2,5-dimercaptohydroquinone were mixed, and 0.2 kg of dibutyltin dilaurate and 130 kg of deionized water were added. The mixture was reacted at 70°C for 5 hours. After cooling to room temperature, 1 kg of triethylamine and 0.8 kg of graphene microsheets were added, and the mixture was ultrasonically dispersed for 25 minutes to obtain a polyetheramine-bisphenol A epoxy cooling solution.

[0048] Example 2

[0049] A short-process technology for manufacturing high-performance phosphor bronze balls using scrap copper, comprising the following steps:

[0050] S1 Scrap Copper Pretreatment: The scrap copper is first manually sorted to remove large impurities; then it is fed into a crusher for crushing to a particle size of 8mm; next, it is soaked in a special degreasing agent for 20 minutes to ensure that the oil on the surface of the scrap copper is completely removed; for scrap copper with a paint layer on the surface, a paint remover is used for paint removal; then, magnetic impurities are removed by magnetic separation equipment; and finally, non-metallic impurities are removed by flotation.

[0051] S2 Smelting and Refining: 75kg of pre-treated scrap copper is added to a medium-frequency induction smelting furnace and heated for smelting; during the smelting process, 1kg of refining agent is added to the furnace. The refining agent reacts chemically with the gas and impurities in the copper liquid to form slag that floats on the surface of the copper liquid, thereby achieving the purpose of removing impurities.

[0052] S3 Phosphorus Copper Alloy Addition: Slowly add 23kg of phosphorus copper alloy to 850kg of refined copper liquid and stir for 20 minutes to ensure that the phosphorus copper alloy can dissolve quickly and evenly in the copper liquid, so that the phosphorus element can be evenly distributed in the copper liquid.

[0053] S4 forming: The copper liquid with added phosphorus copper alloy is introduced into the upper continuous casting equipment, so that the copper liquid cools and solidifies in the crystallizer and is directly cast into phosphorus copper ball billets.

[0054] S5 post-processing: The phosphor bronze ball blank is placed in an annealing furnace for annealing; then cooled with polyetheramine-bisphenol A epoxy coolant; polished by mechanical polishing; and finally cleaned with ultrasonic cleaning equipment for 15 minutes to obtain high-performance phosphor bronze balls.

[0055] The special degreasing agent mentioned is sodium carbonate.

[0056] The paint remover mentioned is sulfuric acid.

[0057] The refining agent is borax and soda ash in a mass ratio of 2:1.

[0058] The S2 melting temperature is 1150℃ and the refining time is 20 minutes.

[0059] The phosphorus content in the aforementioned phosphorus-copper alloy is 15 wt%.

[0060] The casting speed of S4 is 4 m / min.

[0061] The S5 annealing temperature is 450℃ and the time is 2 hours.

[0062] The preparation method of the polyetheramine-bisphenol A epoxy coolant is as follows:

[0063] 7 kg of polyetheramine D230, 5 kg of bisphenol A epoxy resin E51, 45 kg of ethylene glycol butyl ether, and 0.1 kg of 2,5-dimercaptohydroquinone were mixed, and 0.3 kg of dibutyltin dilaurate and 140 kg of deionized water were added. The mixture was reacted at 75°C for 5.5 hours. After cooling to room temperature, 2 kg of triethylamine and 0.9 kg of graphene microsheets were added, and the mixture was ultrasonically dispersed for 35 minutes to obtain a polyetheramine-bisphenol A epoxy cooling solution.

[0064] Example 3

[0065] A short-process technology for manufacturing high-performance phosphor bronze balls using scrap copper, comprising the following steps:

[0066] S1 Scrap Copper Pretreatment: The scrap copper is first manually sorted to remove large impurities; then it is fed into a crusher for crushing to a particle size of 6mm; next, it is soaked in a special degreasing agent for 25 minutes to ensure that the oil on the surface of the scrap copper is completely removed; for scrap copper with a paint layer on the surface, a paint remover is used for paint removal; then, magnetic impurities are removed by magnetic separation equipment; and finally, non-metallic impurities are removed by flotation.

[0067] S2 Smelting and Refining: 85kg of pretreated scrap copper is added to a medium-frequency induction smelting furnace and heated for smelting; during the smelting process, 1.5kg of refining agent is added to the furnace. The refining agent reacts chemically with the gas and impurities in the copper liquid to form slag that floats on the surface of the copper liquid, thereby achieving the purpose of removing impurities.

[0068] S3 Phosphorus Copper Alloy Addition: Slowly add 26kg of phosphorus copper alloy to 950kg of refined copper liquid and stir for 25 minutes to ensure that the phosphorus copper alloy can dissolve quickly and evenly in the copper liquid, so that the phosphorus element can be evenly distributed in the copper liquid.

[0069] S4 forming: The copper liquid with added phosphorus copper alloy is introduced into the upper continuous casting equipment, so that the copper liquid cools and solidifies in the crystallizer and is directly cast into phosphorus copper ball billets.

[0070] S5 post-processing: The phosphor bronze ball blank is placed in an annealing furnace for annealing; then cooled with polyetheramine-bisphenol A epoxy coolant; polished by mechanical polishing; and finally cleaned with ultrasonic cleaning equipment for 15 minutes to obtain high-performance phosphor bronze balls.

[0071] The special degreasing agent mentioned is sodium silicate.

[0072] The paint remover mentioned is sulfuric acid.

[0073] The refining agent is borax and soda ash in a mass ratio of 2:1.

[0074] The S2 melting temperature is 1250℃, and the refining time is 25 minutes.

[0075] The phosphorus content in the aforementioned phosphorus-copper alloy is 15 wt%.

[0076] The casting speed of S4 is 4 m / min.

[0077] The S5 annealing temperature is 550℃ and the time is 2 hours.

[0078] The preparation method of the polyetheramine-bisphenol A epoxy coolant is as follows:

[0079] 8 kg of polyetheramine D230, 5 kg of bisphenol A epoxy resin E51, 53 kg of ethylene glycol butyl ether, and 0.2 kg of 2,5-dimercaptohydroquinone were mixed, and 0.4 kg of dibutyltin dilaurate and 160 kg of deionized water were added. The mixture was reacted at 75°C for 5.5 hours. After cooling to room temperature, 3 kg of triethylamine and 1.1 kg of graphene microsheets were added, and the mixture was ultrasonically dispersed for 55 minutes to obtain a polyetheramine-bisphenol A epoxy cooling solution.

[0080] Example 4

[0081] A short-process technology for manufacturing high-performance phosphor bronze balls using scrap copper, comprising the following steps:

[0082] S1 Scrap Copper Pretreatment: The scrap copper is first manually sorted to remove large impurities; then it is fed into a crusher for crushing to a particle size of 5mm; next, it is soaked in a special degreasing agent for 30 minutes to ensure that the oil on the surface of the scrap copper is completely removed; for scrap copper with a paint layer on the surface, a paint remover is used for paint removal; then, magnetic impurities are removed by magnetic separation equipment; finally, non-metallic impurities are removed by flotation.

[0083] S2 Smelting and Refining: 90kg of pre-treated scrap copper is added to a medium-frequency induction smelting furnace and heated for smelting; during the smelting process, 2kg of refining agent is added to the furnace. The refining agent reacts chemically with the gas and impurities in the copper liquid to form slag that floats on the surface of the copper liquid, thereby achieving the purpose of removing impurities.

[0084] S3 Phosphorus Copper Alloy Addition: Slowly add 27kg of phosphorus copper alloy to 1000kg of refined copper liquid and stir for 30 minutes to ensure that the phosphorus copper alloy can dissolve quickly and evenly in the copper liquid, so that the phosphorus element can be evenly distributed in the copper liquid.

[0085] S4 forming: The copper liquid with added phosphorus copper alloy is introduced into the upper continuous casting equipment, so that the copper liquid cools and solidifies in the crystallizer and is directly cast into phosphorus copper ball billets.

[0086] S5 post-processing: The phosphor bronze ball blank is placed in an annealing furnace for annealing; then cooled with polyetheramine-bisphenol A epoxy coolant; polished by mechanical polishing; and finally cleaned with ultrasonic cleaning equipment for 20 minutes to obtain high-performance phosphor bronze balls.

[0087] The special degreasing agent mentioned is oxalic acid.

[0088] The paint remover mentioned is hydrochloric acid.

[0089] The refining agent is borax and soda ash in a mass ratio of 2:1.

[0090] The S2 melting temperature is 1300℃ and the refining time is 30 minutes.

[0091] The phosphorus content in the aforementioned phosphorus-copper alloy is 15 wt%.

[0092] The casting speed of S4 is 5 m / min.

[0093] The S5 annealing temperature is 600℃ and the time is 3 hours.

[0094] The preparation method of the polyetheramine-bisphenol A epoxy coolant is as follows:

[0095] 9 kg of polyetheramine D230, 6 kg of bisphenol A epoxy resin E51, 56 kg of ethylene glycol butyl ether, and 0.3 kg of 2,5-dimercaptohydroquinone were mixed, and 0.5 kg of dibutyltin dilaurate and 170 kg of deionized water were added. The mixture was reacted at 80°C for 6 hours. After cooling to room temperature, 4 kg of triethylamine and 1.2 kg of graphene microsheets were added, and the mixture was ultrasonically dispersed for 60 minutes to obtain a polyetheramine-bisphenol A epoxy cooling solution.

[0096] Comparative Example 1

[0097] A short-process technology for manufacturing high-performance phosphor bronze balls using scrap copper, comprising the following steps:

[0098] S1 Scrap Copper Pretreatment: The scrap copper is first manually sorted to remove large impurities; then it is fed into a crusher for crushing to a particle size of 10mm; next, it is soaked in a special degreasing agent for 15 minutes to ensure that the oil on the surface of the scrap copper is completely removed; for scrap copper with a paint layer on the surface, a paint remover is used for paint removal; then, magnetic impurities are removed by magnetic separation equipment; and finally, non-metallic impurities are removed by flotation.

[0099] S2 Smelting and Refining: 70kg of pre-treated scrap copper is added to a medium-frequency induction smelting furnace and heated for smelting; during the smelting process, 0.5kg of refining agent is added to the furnace. The refining agent reacts chemically with the gas and impurities in the copper liquid to form slag that floats on the surface of the copper liquid, thereby achieving the purpose of removing impurities.

[0100] S3 Phosphorus Copper Alloy Addition: Slowly add 21kg of phosphorus copper alloy to 800kg of refined copper liquid and stir for 15 minutes to ensure that the phosphorus copper alloy can dissolve quickly and evenly in the copper liquid, so that the phosphorus element can be evenly distributed in the copper liquid.

[0101] S4 forming: The copper liquid with added phosphorus copper alloy is introduced into the upper continuous casting equipment, so that the copper liquid cools and solidifies in the crystallizer and is directly cast into phosphorus copper ball billets.

[0102] S5 post-processing: The phosphor bronze ball blank is placed in an annealing furnace for annealing; then cooled with polyetheramine-bisphenol A epoxy coolant; polished by mechanical polishing; and finally cleaned with ultrasonic cleaning equipment for 10 minutes to obtain high-performance phosphor bronze balls.

[0103] The special degreasing agent mentioned is sodium hydroxide.

[0104] The paint remover mentioned is nitric acid.

[0105] The refining agent is borax and soda ash in a mass ratio of 2:1.

[0106] The S2 melting temperature is 1100℃ and the refining time is 15 minutes.

[0107] The phosphorus content in the aforementioned phosphorus-copper alloy is 15 wt%.

[0108] The casting speed of S4 is 3 m / min.

[0109] The S5 annealing temperature is 400℃ and the time is 1 hour.

[0110] The preparation method of the polyetheramine-bisphenol A epoxy coolant is as follows:

[0111] 6 kg of polyetheramine D230 and 4 kg of bisphenol A epoxy resin E51 were mixed, and 0.2 kg of dibutyltin dilaurate and 130 kg of deionized water were added. The mixture was reacted at 70°C for 5 hours. After cooling to room temperature, 1 kg of triethylamine and 0.8 kg of graphene microsheets were added, and the mixture was ultrasonically dispersed for 25 minutes to obtain polyetheramine-bisphenol A epoxy cooling solution.

[0112] Comparative Example 2

[0113] A short-process technology for manufacturing high-performance phosphor bronze balls using scrap copper, comprising the following steps:

[0114] S1 Scrap Copper Pretreatment: The scrap copper is first manually sorted to remove large impurities; then it is fed into a crusher for crushing to a particle size of 10mm; next, it is soaked in a special degreasing agent for 15 minutes to ensure that the oil on the surface of the scrap copper is completely removed; for scrap copper with a paint layer on the surface, a paint remover is used for paint removal; then, magnetic impurities are removed by magnetic separation equipment; and finally, non-metallic impurities are removed by flotation.

[0115] S2 Smelting and Refining: 70kg of pre-treated scrap copper is added to a medium-frequency induction smelting furnace and heated for smelting; during the smelting process, 0.5kg of refining agent is added to the furnace. The refining agent reacts chemically with the gas and impurities in the copper liquid to form slag that floats on the surface of the copper liquid, thereby achieving the purpose of removing impurities.

[0116] S3 Phosphorus Copper Alloy Addition: Slowly add 21kg of phosphorus copper alloy to 800kg of refined copper liquid and stir for 15 minutes to ensure that the phosphorus copper alloy can dissolve quickly and evenly in the copper liquid, so that the phosphorus element can be evenly distributed in the copper liquid.

[0117] S4 forming: The copper liquid with added phosphorus copper alloy is introduced into the upper continuous casting equipment, so that the copper liquid cools and solidifies in the crystallizer and is directly cast into phosphorus copper ball billets.

[0118] S5 post-processing: The phosphor bronze ball blank is placed in an annealing furnace for annealing; then cooled with polyetheramine-bisphenol A epoxy coolant; polished by mechanical polishing; and finally cleaned with ultrasonic cleaning equipment for 10 minutes to obtain high-performance phosphor bronze balls.

[0119] The special degreasing agent mentioned is sodium hydroxide.

[0120] The paint remover mentioned is nitric acid.

[0121] The refining agent is borax and soda ash in a mass ratio of 2:1.

[0122] The S2 melting temperature is 1100℃ and the refining time is 15 minutes.

[0123] The phosphorus content in the aforementioned phosphorus-copper alloy is 15 wt%.

[0124] The casting speed of S4 is 3 m / min.

[0125] The S5 annealing temperature is 400℃ and the time is 1 hour.

[0126] The preparation method of the polyetheramine-bisphenol A epoxy coolant is as follows:

[0127] 6 kg of polyetheramine D230, 4 kg of bisphenol A epoxy resin E51, and 0.03 kg of 2,5-dimercaptohydroquinone were mixed, and 0.2 kg of dibutyltin dilaurate and 130 kg of deionized water were added. The mixture was reacted at 70°C for 5 hours. After cooling to room temperature, 1 kg of triethylamine and 0.8 kg of graphene microsheets were added, and the mixture was ultrasonically dispersed for 25 minutes to obtain a polyetheramine-bisphenol A epoxy cooling solution.

[0128] Comparative Example 3

[0129] A short-process technology for manufacturing high-performance phosphor bronze balls using scrap copper, comprising the following steps:

[0130] S1 Scrap Copper Pretreatment: The scrap copper is first manually sorted to remove large impurities; then it is fed into a crusher for crushing to a particle size of 10mm; next, it is soaked in a special degreasing agent for 15 minutes to ensure that the oil on the surface of the scrap copper is completely removed; for scrap copper with a paint layer on the surface, a paint remover is used for paint removal; then, magnetic impurities are removed by magnetic separation equipment; and finally, non-metallic impurities are removed by flotation.

[0131] S2 Smelting and Refining: 70kg of pre-treated scrap copper is added to a medium-frequency induction smelting furnace and heated for smelting; during the smelting process, 0.5kg of refining agent is added to the furnace. The refining agent reacts chemically with the gas and impurities in the copper liquid to form slag that floats on the surface of the copper liquid, thereby achieving the purpose of removing impurities.

[0132] S3 Phosphorus Copper Alloy Addition: Slowly add 21kg of phosphorus copper alloy to 800kg of refined copper liquid and stir for 15 minutes to ensure that the phosphorus copper alloy can dissolve quickly and evenly in the copper liquid, so that the phosphorus element can be evenly distributed in the copper liquid.

[0133] S4 forming: The copper liquid with added phosphorus copper alloy is introduced into the upper continuous casting equipment, so that the copper liquid cools and solidifies in the crystallizer and is directly cast into phosphorus copper ball billets.

[0134] S5 post-processing: The phosphor bronze ball blank is placed in an annealing furnace for annealing; then cooled with polyetheramine-bisphenol A epoxy coolant; polished by mechanical polishing; and finally cleaned with ultrasonic cleaning equipment for 10 minutes to obtain high-performance phosphor bronze balls.

[0135] The special degreasing agent mentioned is sodium hydroxide.

[0136] The paint remover mentioned is nitric acid.

[0137] The refining agent is borax and soda ash in a mass ratio of 2:1.

[0138] The S2 melting temperature is 1100℃ and the refining time is 15 minutes.

[0139] The phosphorus content in the aforementioned phosphorus-copper alloy is 15 wt%.

[0140] The casting speed of S4 is 3 m / min.

[0141] The S5 annealing temperature is 400℃ and the time is 1 hour.

[0142] The preparation method of the polyetheramine-bisphenol A epoxy coolant is as follows:

[0143] 6 kg of polyetheramine D230, 4 kg of bisphenol A epoxy resin E51, and 42 kg of ethylene glycol butyl ether were mixed, and 0.2 kg of dibutyltin dilaurate and 130 kg of deionized water were added. The mixture was reacted at 70°C for 5 hours. After cooling to room temperature, 1 kg of triethylamine and 0.8 kg of graphene microsheets were added, and the mixture was ultrasonically dispersed for 25 minutes to obtain polyetheramine-bisphenol A epoxy cooling solution.

[0144] Table 1: Test Results of Examples and Comparative Examples

[0145]

[0146]

[0147] Based on the data analysis of the above embodiments and comparative examples, the phosphor bronze ball of the present invention has high hardness and electrical conductivity, and is a high-performance phosphor bronze ball.

[0148] 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 for manufacturing high performance phosphorous copper balls from scrap copper, characterized by: The operation steps are: S1 waste copper pretreatment: the waste copper is first manually sorted to remove large impurities; then the waste copper is sent into a crusher for crushing treatment to a particle size of 5-10 mm; then the waste copper is soaked with an oil removal agent for 15-30 minutes to ensure that the oil stains on the surface of the waste copper are completely removed; for the waste copper with a paint layer on the surface, a paint removal agent is used for paint removal treatment; then magnetic impurities are removed by a magnetic separation device; non-metallic impurities are removed by a flotation process; S2 smelting and refining: 70-90 parts by mass of the pretreated waste copper is added into a medium-frequency induction smelting furnace for smelting by heating; during the smelting process, 0.5-2 parts by mass of a refining agent is added into the furnace, and the refining agent reacts with the gas and impurities in the copper liquid to form a molten slag floating on the surface of the copper liquid, so as to remove the impurities; S3 phosphor copper alloy addition: 21-27 parts by mass of the phosphor copper alloy is slowly added into 800-1000 parts by mass of the refined copper liquid, and stirred for 15-30 minutes to ensure that the phosphor copper alloy can be quickly and uniformly dissolved in the copper liquid, so that the phosphorus element is uniformly distributed in the copper liquid; S4 forming: the copper liquid after the addition of the phosphor copper alloy is introduced into an up-drawing continuous casting device, so that the copper liquid is cooled and solidified in a crystallizer to directly draw and cast a phosphor copper ball blank; S5 post-treatment: the phosphor copper ball blank is placed into an annealing furnace for annealing, and then cooled by a polyetheramine-bisphenol A epoxy cooling liquid; The polishing is performed by a mechanical polishing method; finally, the high-performance phosphor copper ball is obtained by cleaning for 10-20 minutes by using an ultrasonic cleaning device. The preparation method of the polyetheramine-bisphenol A epoxy cooling liquid is as follows: 6-9 parts of polyetheramine, 4-6 parts of bisphenol A epoxy resin, 42-56 parts of ethylene glycol butyl ether, 0.03-0.3 parts of 2,5-dimercaptotoluene, 0.2-0.5 parts of dibutyl tin dilaurate, 130-170 parts of deionized water are mixed, and reacted at 70-80℃ for 5-6 hours; after the temperature is lowered to room temperature, 1-4 parts of triethylamine and 0.8-1.2 parts of graphene microsheet are added, and ultrasonic dispersion is performed for 25-60 minutes to obtain the polyetheramine-bisphenol A epoxy cooling liquid.

2. A short process for manufacturing high performance phosphorous copper balls from scrap copper as claimed in claim 1 wherein: The oil removal agent is one of sodium hydroxide, sodium carbonate, sodium silicate, sodium phosphate, citric acid and oxalic acid.

3. A short process for manufacturing high performance phosphorous copper balls from scrap copper as claimed in claim 1 wherein the said process comprises of the following steps: The paint removal agent is one of nitric acid, sulfuric acid and hydrochloric acid.

4. A short process for manufacturing high performance phosphorous copper balls from scrap copper as claimed in claim 1 wherein the said process comprises of the following steps: The refining agent is borax and soda ash, and the mass ratio is 2:

1.

5. The short-process technology for manufacturing high-performance phosphor bronze balls using scrap copper according to claim 1, characterized in that: The smelting temperature of S2 is 1100-1300℃, and the refining time is 15-30 minutes.

6. A short process for manufacturing high performance phosphorous copper balls from scrap copper as claimed in claim 1 wherein the said process comprises of the following steps: The content of phosphorus in the phosphor copper alloy is 15wt%.

7. The short-process technology for manufacturing high-performance phosphor bronze balls using scrap copper according to claim 1, characterized in that: The drawing speed of S4 is 3-5 m / min.

8. The short-process technology for manufacturing high-performance phosphor bronze balls using scrap copper according to claim 1, characterized in that: The annealing temperature of S5 is 400-600℃, and the time is 1-3 hours.

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