Method for regenerating copper rod from waste copper wire and regenerated copper rod

Abstract

The invention discloses a method for regenerating a copper rod from a waste copper wire and the regenerated copper rod. The treatment process comprises the following steps that firstly, the surface of the waste copper wire is cleaned, and the waste copper wire is put into a crusher to be made into waste copper particles; 2, the waste copper particles are put into an ultrasonic cleaning machine, peripheral pollution impurities are removed, and preliminary separation is conducted according to the particle size; and 4, the treated waste copper particles, an oxidizing agent and a circulating agent are sequentially put into a high-frequency smelting furnace and heated to 950-1100 DEG C for primary hot pressing operation to form a copper blank, then the temperature is increased to 1100-1200 DEG C, secondary hot pressing forming is carried out, and then hot extrusion is carried out to form a copper rod, so that the problems that existing waste copper wires possibly contain various impurities, and the production cost is low can be solved. And if the impurities such as oil stains, oxides and other metals cannot be completely removed in the smelting process, the purity and the performance of the copper rod can be influenced.

Description

Technical Field

[0001] The invention belongs to the technical field of liquid experiments, and in particular relates to a method for regenerating copper rods from waste copper wires and the regenerated copper rods. Background Art

[0002] Scrap copper wire refers to copper products that have been discarded or have no further use value. These copper products mainly come from industries such as electricity, communications, machinery manufacturing, and automobile manufacturing, including copper cables, coils, and pipes. Scrap copper wire, as a type of scrap non-ferrous metal, has a high recycling value because of its high content of pure copper. The recycling and reuse of scrap copper wire is of great significance to environmental protection and resource conservation. By recycling scrap copper wire, the mining of primary copper resources can be reduced, thereby saving a lot of energy and raw materials, reducing the generation of solid waste, and reducing the pollution pressure on the environment.

[0003] Regenerating copper rod from scrap copper wire is a process involving the recovery and reuse of scrap copper. After a series of recovery, treatment and processing steps, scrap copper wire can be regenerated into copper rod for further use. Scrap copper wire may contain various impurities, such as oil, oxides, other metals, etc. If these impurities cannot be completely removed during the smelting process, they will affect the purity and performance of the copper rod. Summary of the invention

[0004] The object of the present invention is to provide a method for regenerating copper rods from scrap copper wires and the regenerated copper rods. The processing technology and the equipment thereof are intended to solve the technical problem that the existing scrap copper wires may contain various impurities, such as oil stains, oxides, other metals, etc. If these impurities cannot be completely removed during the smelting process, the purity and performance of the copper rods will be affected.

[0005] The invention also provides a recycled copper rod made by the method.

[0006] In order to solve the above technical problems, the present invention provides a method for regenerating copper rods from waste copper wire, the steps of which are as follows:

[0007] Step 1: First, use a water gun to clean the surface of the waste copper wire, then use a peeling machine to peel the waste copper wire, and then repeatedly clean the peeled waste copper wire, put it into a crusher and make waste copper particles;

[0008] Step 2: Put the waste copper particles into an ultrasonic cleaning machine and add alkaline cleaning agent and organic solvent to remove the impurities on the periphery of the waste copper particles, and then screen them through a vibrating screen, a drum screen and a centrifuge in sequence, and perform preliminary separation according to the particle size. The ratio of the waste copper particles, alkaline cleaning agent and organic solvent is 1:1.5:1.8;

[0009] Step 3: The waste copper particles are first fed into the sorting area of ​​the eddy current separator evenly and continuously through a vibrating feeding device. The separated waste copper particles are collected into a designated container and flux is added to treat the waste copper particles.

[0010] Step 4: The treated waste copper particles are put into a high-frequency melting furnace with an oxidant and a circulating agent, heated to 950°-1100° for preliminary hot pressing to form a copper billet. The initial hot pressing pressure is in the range of 1500-1600MP. The temperature is then raised to 1100°-1200°, and hot pressing is performed for the second time. Then, hot extrusion is performed to form a copper rod with a pressure in the range of 1600-1750MP.

[0011] Preferably, in step 1, the waste copper wire put into the peeling machine is cut into sections of 250±50 cm and put into the crusher, and the diameter of the waste copper particles is 1.5-2.5 mm.

[0012] Preferably, in step 2, the internal heating temperature of the ultrasonic cleaning machine is 50°-60°, the alkaline cleaning agent is composed of potassium hydroxide cleaning agent and alkaline ion cleaning agent, 35-45% of potassium hydroxide cleaning agent and 65-75% of alkaline ion cleaning agent, the organic solvent is composed of alcohol solvent, ketone solvent and aromatic hydrocarbon solvent, 30-40% of alcohol solvent, 45-55% of ketone solvent and 10-15% of aromatic hydrocarbon solvent, and the overall cleaning time is controlled at 35-45 minutes.

[0013] Preferably, in step 2, the vibration screen speed is controlled between 1000-2000 rpm, the drum screen speed is controlled between 5-6 rpm, and the centrifuge speed is controlled between 2000-3000 rpm.

[0014] Preferably, the mesh size of the vibrating screen is 2mm-3mm, the mesh size of the drum screen is 1mm-1.5mm, and the mesh size of the centrifuge is 1.5mm-2mm.

[0015] Preferably, in step three, the speed of the eddy current separator is controlled at 3000r / min, the magnetic field strength is 600-750mT, the overall time is controlled at 2-3 minutes, and the waste copper particles after sorting are put into a flux, wrapped and sealed, and the flux is composed of sodium carbonate, cryolite and sodium fluoride, with 10%-35% sodium carbonate, 10%-40% cryolite and 15%-30% sodium fluoride.

[0016] Preferably, in step 4, the high-frequency melting furnace is raised to 1200° for preheating for 10 minutes, cooled to the lowest temperature, and put into the high-frequency melting furnace to evaporate water vapor on the waste copper particles using the residual temperature for 15±5 minutes. The extrusion ratio is 9:1. During heating, an oxidant and a flow agent are added. The initial speed is 0.5-1mm / s, and the extrusion speed is again 0.35-0.55mm / s for 20±5 minutes.

[0017] Preferably, the oxidant is composed of hydrogen peroxide, chlorine and potassium permanganate, and the flow agent is composed of carbonate, carboxymethyl cellulose and polydimethylsiloxane in one part, with hydrogen peroxide 30%-40%, chlorine 15%-25% and potassium permanganate 20%-45%.

[0018] A recycled copper rod is made according to the above method for recycling copper rods from waste copper wire.

[0019] Beneficial Effects

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention avoids impurity infiltration into the produced waste copper particles by cleaning the outside of the waste copper wire, removes impurities from the periphery of the waste copper particles by adding specific alkaline cleaning agents and organic solvents, uses a vibrating screen, a drum screen and a centrifuge to screen in sequence, performs preliminary separation according to the particle size, removes excess impurities, uses an eddy current separator to use a magnetic field to sort out waste copper particles that are not large enough and not heavy enough, and specifies the overall waste copper particle size and weight, adds flux, oxidant and circulation agent to put them into a high-frequency melting furnace, increases the overall hot melting effect, removes internal impurities, and then performs secondary hot pressing to improve the overall purity and performance. DETAILED DESCRIPTION

[0021] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the technical scheme in the specific implementation mode of the present invention is clearly and completely described below to further illustrate the present invention. Obviously, the specific implementation mode described is only a part of the implementation mode of the present invention, rather than all styles.

[0022] Example 1

[0023] This example provides a method for regenerating copper rods from waste copper wire, the method comprising the following steps:

[0024] Step 1: First, use a water gun to clean the surface of the waste copper wire, then use a peeling machine to peel the waste copper wire, and then repeat the peeling of the waste copper wire. Wash it again, put it into the crusher and make waste copper particles. Put the waste copper wire in the peeling machine into 300cm sections and put it into the crusher. The diameter of the waste copper particles is 1.5-2.5mm;

[0025] Step 2: Put the waste copper particles into an ultrasonic cleaning machine, add alkaline cleaning agent and organic solvent, remove the impurities on the periphery of the waste copper particles, and then screen them in turn through a vibrating screen, a drum screen and a centrifuge, and perform preliminary separation according to the particle size. The ratio of the waste copper particles, alkaline cleaning agent and organic solvent is 1:1.5:1.8, and the internal heating temperature of the ultrasonic cleaning machine is 50°-60°. The alkaline cleaning agent is composed of potassium hydroxide cleaning agent and alkaline ion cleaning agent, with potassium hydroxide cleaning agent 35-45% and alkaline ion cleaning agent 65-75%. The organic solvent is composed of alcohol solvent, ketone solvent and aromatic hydrocarbon solvent, with alcohol solvent 30-40%, ketone solvent 45-55% and aromatic hydrocarbon solvent 10-15%, and the overall cleaning time is controlled within 35-45 minutes;

[0026] Step 3: The waste copper particles are first fed into the sorting area of ​​the eddy current separator evenly and continuously through the vibrating feeding device. The separated waste copper particles are collected in a designated container and flux is added to treat the waste copper particles. In step 2, the speed of the vibrating screen is controlled between 1000-2000 rpm, the speed of the drum screen is controlled between 5-6 rpm and the speed of the centrifuge is controlled between 2000-3000 rpm. The mesh size of the vibrating screen is 2mm-3 mm, the screen of the drum screen is selected at 1mm-1.5mm, the screen of the centrifuge is 1.5mm-2mm, the speed of the eddy current separator in step 3 is controlled at 3000r / min, the magnetic field strength is 600-750mT, the overall time is controlled at 2-3 minutes, and the waste copper particles after sorting are put into the flux and wrapped and sealed. The flux is composed of sodium carbonate, cryolite and sodium fluoride, with 10%-35% of sodium carbonate, 10%-40% of cryolite and 15%-30% of sodium fluoride;

[0027] Step 4: The treated waste copper particles are heated to 950°-1100° in turn for preliminary hot pressing operation to form copper billets. The initial hot pressing pressure is in the range of 1500-1600MP, and then the temperature is increased to 1100°-1200°, and hot pressing is performed for the second time. Then hot extrusion is performed into copper rods at a pressure of 1600-1750MP. The high-frequency melting furnace is increased to 1200° for preheating for 10 minutes, cooled to the lowest temperature, and put into the high-frequency melting furnace. The residual temperature is used to evaporate the water vapor on the waste copper particles for 20 minutes, and the extrusion ratio is 9:1. During heating, an oxidant and a circulating agent are added, the initial speed is 0.5-1mm / s, and the extrusion speed is again 0.35-0.55mm / s for 25 minutes. The oxidant is composed of hydrogen peroxide, chlorine and potassium permanganate.

[0028] Example 2

[0029] This example provides a method for regenerating copper rods from waste copper wire, the method comprising the following steps:

[0030] Step 1: First, use a water gun to clean the surface of the waste copper wire, then use a peeling machine to peel the waste copper wire, and then repeat the cleaning of the peeled waste copper wire, put it into the crusher and make waste copper particles. The waste copper wire put into the peeling machine is cut into 200cm sections and put into the crusher. The diameter of the waste copper particles is 1.5-2.5mm;

[0031] Step 2: Put the waste copper particles into an ultrasonic cleaning machine, add alkaline cleaning agent and organic solvent, remove the impurities on the periphery of the waste copper particles, and then screen them through a vibrating screen, a drum screen and a centrifuge in turn, and perform preliminary separation according to the particle size. The ratio of the waste copper particles, alkaline cleaning agent and organic solvent is 1:1.5:1.8. The internal heating temperature of the ultrasonic cleaning machine is 60°. The alkaline cleaning agent is composed of potassium hydroxide cleaning agent and alkaline ion cleaning agent, with potassium hydroxide cleaning agent 35-45% and alkaline ion cleaning agent 65-75%. The organic solvent is composed of alcohol solvent, ketone solvent and aromatic hydrocarbon solvent, with alcohol solvent 30-40%, ketone solvent 45-55% and aromatic hydrocarbon solvent 10-15%, and the overall cleaning time is controlled within 45 minutes;

[0032] Step 3: The waste copper particles are first fed into the sorting area of ​​the eddy current separator evenly and continuously through a vibrating feeding device, and the separated waste copper particles are collected in a designated container, and a flux is added to treat the waste copper particles. In step 2, the speed of the vibrating screen is controlled between 1500 rpm, the speed of the drum screen is controlled between 5-6 rpm, and the speed of the centrifuge is controlled between 2500 rpm. The mesh specifications of the vibrating screen are selected to be 2mm, the mesh of the drum screen is selected to be 1.5mm, and the mesh of the centrifuge is 1.5mm. In step 3, the speed of the eddy current separator is controlled at 3000r / min, the magnetic field strength is 600-750mT, and the overall time is controlled at 3 minutes. After sorting, the waste copper particles are put into a flux, wrapped and sealed, and the flux is composed of sodium carbonate, cryolite and sodium fluoride, with 10%-35% of sodium carbonate, 10%-40% of cryolite and 15%-30% of sodium fluoride;

[0033] Step 4: Put the treated waste copper particles into the high-frequency melting furnace in turn, select the oxidant, heat to 950°-1100° for preliminary hot pressing operation to form copper billets, the initial hot pressing pressure is in the range of 1500-1600MP, then the temperature is increased to 1100°-1200°, hot pressing is performed for the second time, and then hot extrusion is performed to form copper rods, the pressure is in the range of 1600-1750MP, the high-frequency melting furnace is increased to 1200° for preheating for 10 minutes, and the temperature is reduced. The temperature is reduced to the lowest temperature, and then put into a high-frequency melting furnace. The residual temperature is used to evaporate the water vapor on the waste copper particles. The time is 105 minutes, and the extrusion ratio is 9:1. During heating, an oxidant and a flow agent are added. The initial speed is 0.5-1mm / s, and the extrusion speed is again 0.35-0.55mm / s. The time is 15 minutes. The oxidant is composed of hydrogen oxide, chlorine and potassium permanganate, with hydrogen oxide 30%-40%, chlorine 15%-25% and potassium permanganate 20%-45%.

[0034] Example 3

[0035] This example provides a method for regenerating copper rods from waste copper wire, the method comprising the following steps:

[0036] Step 1: First, use a water gun to clean the surface of the waste copper wire, then use a peeling machine to peel the waste copper wire, and then repeat the cleaning of the peeled waste copper wire, put it into the crusher and make waste copper particles. The waste copper wire put into the peeling machine is cut into 200cm sections and put into the crusher. The diameter of the waste copper particles is 1.5-2.5mm;

[0037] Step 2: Put the waste copper particles into an ultrasonic cleaning machine, add alkaline cleaning agent and organic solvent, remove the impurities on the periphery of the waste copper particles, and then screen them in turn through a vibrating screen, a drum screen and a centrifuge, and perform preliminary separation according to the particle size. The ratio of the waste copper particles, alkaline cleaning agent and organic solvent is 1:1.5:1.8. The internal heating temperature of the ultrasonic cleaning machine is 50°. The alkaline cleaning agent is composed of potassium hydroxide cleaning agent and alkaline ion cleaning agent, with potassium hydroxide cleaning agent 35-45% and alkaline ion cleaning agent 65-75%. The organic solvent is composed of alcohol solvent, ketone solvent and aromatic hydrocarbon solvent, with alcohol solvent 30-40%, ketone solvent 45-55% and aromatic hydrocarbon solvent 10-15%, and the overall cleaning time is controlled within 35 minutes;

[0038] Step 3: The waste copper particles are first fed into the sorting area of ​​the eddy current separator evenly and continuously through a vibrating feeding device, and the separated waste copper particles are collected in a designated container, and a flux is added to treat the waste copper particles. In step 2, the speed of the vibrating screen is controlled between 2000 rpm, the speed of the drum screen is controlled between 5-6 rpm, and the speed of the centrifuge is controlled between 3000 rpm. The mesh specifications of the vibrating screen are selected to be 3mm, the mesh of the drum screen is selected to be 1.5mm, and the mesh of the centrifuge is 2mm. In step 3, the speed of the eddy current separator is controlled at 3000r / min, the magnetic field strength is 700-750mT, and the overall time is controlled at 3 minutes. After sorting, the waste copper particles are put into a flux, wrapped and sealed. The flux is composed of sodium carbonate, cryolite and sodium fluoride, with 10%-35% of sodium carbonate, 10%-40% of cryolite and 15%-30% of sodium fluoride;

[0039] Step 4: Put the treated waste copper particles, oxidant and circulating agent into the high-frequency melting furnace in turn, heat to 950°-1100° for preliminary hot pressing operation to form copper billets, the initial hot pressing pressure is in the range of 1500-1600MP, then the temperature is increased to 1100°-1200°, hot pressing is performed for the second time, and hot extrusion is performed into copper rods, the pressure is in the range of 1600-1750MP, the high-frequency melting furnace is increased to 1200° for preheating for 10 minutes, cooled to the lowest temperature, and put into the high-frequency melting furnace. The residual temperature is used to evaporate the water vapor on the waste copper particles for 15±5 minutes, and the extrusion ratio is 9:1. During heating, an oxidant and a flow agent are added, and the initial speed is 0.5-0.8 mm / s. The re-extrusion speed is 0.35-0.45 mm / s for 20 minutes. The oxidant is composed of hydrogen oxide, chlorine and potassium permanganate, and the flow agent is composed of carbonate, carboxymethyl cellulose and polydimethylsiloxane in one part, with hydrogen oxide 30%-40%, chlorine 15%-25% and potassium permanganate 20%-45%.

[0040] The above describes the main technical features and basic principles of the present invention and the related advantages. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the concept or basic features of the present invention. Therefore, no matter from which point of view, the above specific embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the attached claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention.

[0041] In addition, it should be understood that although the present specification is described according to various implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each implementation method may also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A method for regenerating copper rods from waste copper wires, characterized in that: The steps are as follows: Step 1: First, use a water gun to clean the surface of the waste copper wire, then use a peeling machine to peel the waste copper wire, and then repeatedly clean the peeled waste copper wire, put it into a crusher and make waste copper particles; Step 2: Put the waste copper particles into an ultrasonic cleaning machine and add alkaline cleaning agent and organic solvent to remove the impurities on the periphery of the waste copper particles, and then screen them through a vibrating screen, a drum screen and a centrifuge in sequence, and perform preliminary separation according to the particle size. The ratio of the waste copper particles, alkaline cleaning agent and organic solvent is 1:1.5:1.8; Step 3: The waste copper particles are first fed into the sorting area of ​​the eddy current separator evenly and continuously through a vibrating feeding device. The separated waste copper particles are collected into a designated container and flux is added to treat the waste copper particles. Step 4: The treated waste copper particles are put into a high-frequency melting furnace with an oxidant and a circulating agent, heated to 950°-1100° for preliminary hot pressing to form a copper billet. The initial hot pressing pressure is in the range of 1500-1600MP. The temperature is then raised to 1100°-1200°, and hot pressing is performed for the second time. Then, hot extrusion is performed to form a copper rod with a pressure in the range of 1600-1750MP.

2. The method for regenerating copper rod from waste copper wire according to claim 1, characterized in that: In step 1, the waste copper wire put into the peeling machine is cut into sections of 250±50cm and put into the crusher. The diameter of the waste copper particles is 1.5-2.5mm.

3. The method for regenerating copper rod from waste copper wire according to claim 1, characterized in that: In step 2, the internal heating temperature of the ultrasonic cleaning machine is 50°-60°, the alkaline cleaning agent is composed of potassium hydroxide cleaning agent and alkaline ion cleaning agent, with 35-45% potassium hydroxide cleaning agent and 65-75% alkaline ion cleaning agent, and the organic solvent is composed of alcohol solvent, ketone solvent and aromatic hydrocarbon solvent, with 30-40% alcohol solvent, 45-55% ketone solvent and 10-15% aromatic hydrocarbon solvent, and the overall cleaning time is controlled at 35-45 minutes.

4. The method for regenerating copper rod from waste copper wire according to claim 1, characterized in that: In step 2, the vibration screen speed is controlled between 1000-2000 rpm, the drum screen speed is controlled between 5-6 rpm, and the centrifuge speed is controlled between 2000-3000 rpm.

5. The method for regenerating copper rod from waste copper wire according to claim 4, characterized in that: The mesh specifications of the vibrating screen are 2mm-3mm, the mesh specifications of the drum screen are 1mm-1.5mm, and the mesh specifications of the centrifuge are 1.5mm-2mm.

6. The method for regenerating copper rod from waste copper wire according to claim 1, characterized in that: In step three, the speed of the eddy current separator is controlled at 3000r / min, the magnetic field strength is 600-750mT, and the overall time is controlled at 2-3 minutes. After sorting, the waste copper particles are put into the flux and wrapped and sealed. The flux is composed of sodium carbonate, cryolite and sodium fluoride, with 10%-35% sodium carbonate, 10%-40% cryolite and 15%-30% sodium fluoride.

7. The method for regenerating copper rod from waste copper wire according to claim 1, characterized in that: In step 4, the high-frequency melting furnace is raised to 1200° for preheating for 10 minutes, cooled to the lowest temperature, put into the high-frequency melting furnace, and the residual temperature is used to evaporate the water vapor on the waste copper particles. The temperature is heated to 950°-1100° for 15±5 minutes, and the extrusion ratio is 9:

1. During heating, an oxidant and a flow agent are added. The initial speed is 0.5-1mm / s, and the extrusion speed is again 0.35-0.55mm / s for 20±5 minutes.

8. The method for regenerating copper rod from waste copper wire according to claim 7, characterized in that: The oxidant is composed of hydrogen peroxide, chlorine and potassium permanganate, and the flow agent is composed of carbonate, carboxymethyl cellulose and polydimethylsiloxane in one part, with hydrogen peroxide 30%-40%, chlorine 15%-25% and potassium permanganate 20%-45%.

9. A recycled copper rod made according to the method for recycling copper rod from waste copper wire according to any one of claims 1 to 8.