CN114318027A - Production process for producing copper bar by scrap copper - Google Patents
Production process for producing copper bar by scrap copper Download PDFInfo
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Abstract
The application relates to the field of copper bar production, and particularly discloses a production process for producing a copper bar by using scrap copper, which comprises the following steps: a. pre-treating; b. crushing; c. refining; d. slagging; e. adjusting the copper content; f. and (6) forming and drawing. This application adopts the specific edulcoration agent of supersound cooperation, the continuous vibration that produces through the supersound shakes the partial foreign particle on useless miscellaneous copper surface and falls, glass microballon hits useless miscellaneous copper under the vibration of supersound, make the greasy dirt top layer on useless miscellaneous copper surface broken, the surfactant infiltration greasy dirt of being convenient for and the surface of infiltrating useless miscellaneous copper, and glass microballon collision useless miscellaneous copper, convert some energy conversion brought by the supersound to internal energy and transmit to useless miscellaneous copper, help accelerating the melting of useless miscellaneous copper, reduce its fused manufacturing cost, need not to calcine useless miscellaneous copper, pollution to the environment has been reduced, certain environmental protection effect has, and the purity of the copper bar that makes is higher, be favorable to improving the utilization ratio of useless miscellaneous copper, and the industrial production is suitable.
Description
Technical Field
The application relates to the field of copper bar production, in particular to a production process for producing a copper bar by using scrap copper.
Background
The scrap copper is waste and leftover materials generated in the production and processing process of copper castings, has complex components, and contains a large amount of metal copper and a certain amount of impurities such as iron, sand, oil stains and the like.
The demand of China on nonferrous metals in the process of realizing industrialization is urgent, particularly the supply of copper is tense, and the shortage of copper resources is one of the main factors restricting the development of the copper processing industry in China, so that how to produce copper which can be used for industry by using scrap copper becomes an important way for making up the shortage of copper resources.
In the related technology, the scrap copper is treated by technical processes such as iron removal, calcination and the like and then is sold as a raw material, although the process is simple, certain pollution is caused to the environment, the resource utilization efficiency of the scrap copper is not high, the purity of the prepared raw material is low, and the requirement of most industrial production cannot be met, so that how to produce high-quality cast copper by using the scrap copper and reduce the environmental pollution become the technical subject of research of numerous copper industry manufacturers.
Disclosure of Invention
In order to solve the problems that the production process for producing copper raw materials by adopting scrap copper has large pollution and the purity of the prepared raw materials is low in the related technology, the application provides the production process for producing the copper rod by using the scrap copper.
The application provides a production technology for producing copper bars by scrap copper, which adopts the following technical scheme:
a production process for producing copper bars by scrap copper comprises the following steps:
a. pretreatment: weighing a proper amount of scrap copper, repeatedly adsorbing for 2-3 times by using a magnet, then placing the scrap copper in a container filled with an impurity removing agent, carrying out ultrasonic treatment for 20-30min, taking out the scrap copper, washing with water, and drying to obtain a scrap copper treatment product;
b. crushing: beating and crushing the scrap copper treatment product until the particle size of the particles is less than or equal to 30mm, and then taking out the deformed particles, plastic and other impurities to obtain scrap copper crushed materials;
c. refining: carrying out melting refining on scrap copper crushed aggregates to obtain scrap copper melt;
d. slagging: adding a slagging agent into the scrap copper melt for refining to generate slag, standing for 8-10min to enable the slag to float upwards, and fishing out the slag;
e. adjusting the copper content: d, detecting the components of the scrap copper melt processed in the step d, adjusting the components of the scrap copper melt according to the detection result, adding a proper amount of metal powder compatible with the scrap copper melt to enable the content of Cu in the scrap copper melt to be 58% -59%, and obtaining copper alloy melt;
f. forming and drawing: preserving the heat of the copper alloy molten liquid for a period of time, then placing the copper alloy molten liquid in a continuous casting crystallizer, cooling and cutting the copper alloy molten liquid into sections to form a copper alloy crude product, and then placing the copper alloy crude product in a wire drawing machine for wire drawing and forming to obtain a copper rod;
the impurity removing agent comprises, by weight, 5-8 parts of glass beads, 6-10 parts of a surfactant and 70-80 parts of water;
the slagging agent comprises 2-3 parts of lime and 4-6 parts of quartz.
By adopting the technical scheme, the magnet is utilized to suck out magnetic substances such as iron and the like adsorbed on the surface of the scrap copper, then the ultrasonic wave is utilized and the impurity removing agent is used as a medium, and the continuous vibration generated by the ultrasonic wave is utilized to shake off some impurity particles such as dust and the like adhered on the surface of the scrap copper, and the condition that the impurity particles are adhered on the surface of the scrap copper again is reduced.
The surfactant is contacted with the oil stains on the surface of the scrap copper, so that the surface tension between the oil stains and the scrap copper is reduced, the wetting angle is reduced, the adhesive force between the oil stains and the scrap copper is further reduced, meanwhile, the surfactant permeates the oil stains, the cohesive force of the oil stains and the affinity between the oil stains and metal are reduced, the separation of the oil stains is accelerated, the treatment time of the impurity removing agent is shortened, and the reduction of the energy consumption of equipment is facilitated.
The glass beads continuously hit the scrap copper under the ultrasonic vibration, the surfaces of the glass beads are oleophilic, and when the scrap copper is hit, a part of oil stains on the surfaces of the scrap copper can be taken away, so that the surface layer of the oil stains on the surfaces of the scrap copper is crushed, a surfactant can conveniently permeate the oil stains and infiltrate the surfaces of the scrap copper, and the impurity removal effect of the impurity removal agent on the scrap copper is further improved; and the glass beads collide with the scrap copper, and part of energy brought by the ultrasonic is converted into internal energy to be transmitted to the scrap copper, so that the melting of the scrap copper is accelerated, the time for melting and refining the scrap copper is shortened, and the production cost for melting the scrap copper is reduced.
And then mixing lime, quartz stone and scrap copper melt for slagging to form slag containing iron, zinc and other impurities in the scrap copper, separating the slag from the scrap copper, and taking out the slag, thereby improving the purity of the prepared copper rod.
According to the method, the scrap copper is not required to be calcined, the pollution to the environment is reduced, a certain environment-friendly effect is achieved, the purity of the prepared copper rod is high, the utilization rate of the scrap copper is favorably improved, and the method is suitable for industrial production.
Preferably, the impurity removing agent also comprises 3-4 parts of sodium alginate by weight.
By adopting the technical scheme, the oil stain separated from the scrap copper is emulsified and dispersed in the impurity removing agent by the surfactant in the impurity removing agent, the sodium alginate is increased in viscosity when meeting water, is mixed with the emulsified oil stain and adheres to the oil stain and dust, so that the dispersion stability of the oil stain in the impurity removing agent can be improved, the secondary deposition of the oil stain or dust on the surface of the scrap copper is reduced, and the impurity removing effect of the impurity removing agent is further improved.
Preferably, the pH of the impurity removing agent is 5-6.
By adopting the technical scheme, the impurity removing agent is acidic, so that the combination of an oxide layer on the scrap copper and the scrap copper is weakened, the subsequent oxide layer is separated from the scrap copper under the impact of water, and under the ph value environment, the sodium alginate and the water are mixed to easily form gel, so that the viscosity of the impurity removing agent is improved, and oil stain and dust are adhered.
Preferably, the impurity removing agent also comprises 2-3 parts of alkanolamide by weight.
By adopting the technical scheme, after the oil stain on the surface of the scrap copper is removed, the alkanolamide is contacted with the scrap copper, and the arc pair electrons on the nitrogen atom on the alkanolamide and the scrap copper form a coordinate bond, so that the alkanolamide is adsorbed on the surface of the scrap copper, the contact of the scrap copper and a corrosion medium is blocked, the corrosion of the scrap copper is inhibited, and the integral performance of the prepared copper rod is improved.
Preferably, the impurity removing agent also comprises 2-3 parts of urea by weight.
By adopting the technical scheme, the urea is added to promote the solubility of the surfactant in water and promote the decomposition of the grease dropped from the surface of the scrap copper in water.
Preferably, in the step a, the ultrasound is performed at 60 to 70 ℃.
By adopting the technical scheme, the compatibility between the oil stain and the impurity removing agent can be improved at high temperature, the penetration of the surfactant to the oil stain is facilitated, and the dropping of the oil stain is accelerated.
Preferably, in the step c, the melting temperature is 1200-1300 ℃, and the melting time is 5-6 h.
By adopting the technical scheme, at the temperature, low-boiling-point impurities such as zinc, lead, antimony and the like in the scrap copper can volatilize first, so that the purity of the prepared copper bar can be improved.
Preferably, in the step d, refining is carried out at 1000-1100 ℃ for 15-20 min.
Preferably, in the step f, the temperature for heat preservation is 1100-1200 ℃, and the time is 5-7 h.
By adopting the technical scheme, the heat preservation is carried out in the molten state, so that the uniform distribution of components in the copper alloy molten liquid is facilitated, and simultaneously, part of non-metallic impurities and air mixed in the copper alloy molten liquid can be removed, thereby increasing the mechanical property of the prepared copper rod.
In summary, the present application has the following beneficial effects:
1. this application adopts the specific edulcoration agent of supersound cooperation, the continuous vibration that produces through the supersound shakes the partial foreign particles on miscellaneous copper scrap surface and falls, miscellaneous agent surfactant infiltration greasy dirt in the edulcoration, accelerate the greasy dirt to break away from, be favorable to reducing the equipment energy consumption, glass bead hits miscellaneous copper scrap under the vibration of supersound, make the greasy dirt top layer on miscellaneous copper scrap surface broken, be convenient for surfactant infiltration greasy dirt and soak miscellaneous copper scrap's surface, and glass bead collision miscellaneous copper scrap, convert some energy brought by the supersound into internal energy and transmit to miscellaneous copper scrap, help accelerating miscellaneous copper scrap's melting, reduce its fused manufacturing cost, need not to calcine miscellaneous copper scrap, pollution to the environment has been reduced, certain environmental protection effect has, and the purity of the copper bar that makes is higher, be favorable to improving miscellaneous copper scrap's utilization ratio, be fit for the industrial production.
2. The preferred sodium alginate that adopts among this application, sodium alginate meets water viscidity and increases, can improve the dispersion stability of greasy dirt in the edulcoration agent, has reduced greasy dirt or dust deposit once more on useless miscellaneous copper surface, has further improved the edulcoration effect of edulcoration agent.
3. According to the method, the alkanolamide is preferably adopted, and the alkanolamide and the scrap copper are easy to form a coordinate bond, so that the alkanolamide is adsorbed on the surface of the scrap copper, the contact between the scrap copper and a corrosive medium is blocked, the corrosion of the scrap copper is inhibited, and the integral performance of the prepared copper rod is improved.
Detailed Description
The present application will be described in further detail with reference to examples.
The glass beads are purchased from processing factories of Hualong mineral products in Lingshou county, and the mesh number is 300 meshes; the surfactant is sodium dodecyl benzene sulfonate; the lime is purchased from Hangzhou New materials, Inc., and has the execution quality standard of HG/T4210-2009, and the mesh number is 300 meshes; the quartz stone is purchased from Changxing Longfeng powder materials GmbH, and the mesh number is 200 meshes; sodium alginate was purchased from Guangzhou city Lele Biotech limited; alkanolamides are available from Cincisco, Inc., Jiangyin; silica was purchased from Fucai mineral products, Inc. in the county of east China sea, and had a mesh size of 300.
The raw materials used in the following embodiments may be those conventionally commercially available unless otherwise specified.
Examples
Example 1
The application discloses a production process for producing copper bars by scrap copper, which comprises the following steps:
a. pretreatment: weighing a proper amount of scrap copper, repeatedly adsorbing for 2 times by using a magnet, then placing the scrap copper into a container filled with an impurity removing agent, performing ultrasonic treatment for 30min at 60 ℃, taking out the scrap copper, washing for 2 times by using water, and drying at 40 ℃ to obtain a scrap copper treatment product;
b. crushing: beating and crushing the scrap copper treatment product by using a forging hammer until the particle size of the particles is less than or equal to 30mm, and then taking out the deformed particles, plastic and other impurities to obtain scrap copper crushed materials;
c. refining: carrying out melt refining on scrap copper crushed aggregates for 6h at 1200 ℃ to obtain scrap copper melt;
d. slagging: adding a slagging agent into the scrap copper melt, refining at 1000 ℃ for 20min to generate slag, standing for 10min to enable the slag to float upwards, and fishing out the slag;
e. adjusting the copper content: d, detecting the components of the scrap copper melt processed in the step d, adjusting the components of the scrap copper melt according to the detection result, adding a proper amount of metal powder compatible with the Cu powder if the Cu content in the scrap copper melt is more than or equal to 59%, and adding a proper amount of red copper powder if the Cu content in the scrap copper melt is less than or equal to 58% so that the Cu content in the scrap copper melt is 58% -59% to obtain copper alloy melt;
f. forming and drawing: and (3) preserving the heat of the copper alloy molten liquid for 7 hours at 1100 ℃, then placing the copper alloy molten liquid in a continuous casting crystallizer, cooling and cutting the copper alloy molten liquid into sections to form a copper alloy crude product, and then placing the copper alloy crude product in a wire drawing machine for wire drawing and forming to obtain the copper rod.
The impurity removing agent is prepared by weighing glass beads, a surfactant and water, uniformly stirring and mixing, wherein the pH of the impurity removing agent is adjusted to 5 by using 20% (v/v) hydrochloric acid solution, and the content of each component is shown in the following table 1-1.
The slag former is prepared by weighing 20g of lime and 40g of quartz powder, and then uniformly stirring and mixing.
Example 2
The application discloses a production process for producing copper bars by scrap copper, which comprises the following steps:
a. pretreatment: weighing a proper amount of scrap copper, repeatedly adsorbing the scrap copper for 3 times by using a magnet, then placing the scrap copper into a container filled with an impurity removing agent, performing ultrasonic treatment for 20min at 70 ℃, taking out the scrap copper, washing the scrap copper for 2 times by using water, and drying the scrap copper at 40 ℃ to obtain a scrap copper treatment product;
b. crushing: beating and crushing the scrap copper treatment product by using a forging hammer until the particle size of the particles is less than or equal to 30mm, and then taking out the deformed particles, plastic and other impurities to obtain scrap copper crushed materials;
c. refining: carrying out melt refining on scrap copper crushed materials at 1300 ℃ for 5h to obtain scrap copper melt;
d. slagging: adding a slagging agent into the scrap copper melt, refining at 1100 ℃ for 15min to generate slag, standing for 8min to enable the slag to float upwards, and fishing out the slag;
e. adjusting the copper content: d, detecting the components of the scrap copper melt processed in the step d, adjusting the components of the scrap copper melt according to the detection result, adding a proper amount of metal powder compatible with the Cu powder if the Cu content in the scrap copper melt is more than or equal to 59%, and adding a proper amount of red copper powder if the Cu content in the scrap copper melt is less than or equal to 58% so that the Cu content in the scrap copper melt is 58% -59% to obtain copper alloy melt;
f. forming and drawing: and (3) preserving the heat of the copper alloy molten liquid for 5 hours at 1200 ℃, then placing the copper alloy molten liquid in a continuous casting crystallizer, cooling and cutting the copper alloy molten liquid into sections to form a copper alloy crude product, and then placing the copper alloy crude product in a wire drawing machine for wire drawing and forming to obtain the copper rod.
The impurity removing agent is prepared by weighing glass beads, a surfactant and water, uniformly stirring and mixing, wherein the pH of the impurity removing agent is adjusted to 6 by using 20% (v/v) hydrochloric acid solution, and the content of each component is shown in the following table 1-1.
The slag former is prepared by weighing 30g of lime and 60g of quartz powder and then uniformly stirring and mixing.
Example 3
The application discloses a production process for producing copper bars by scrap copper, which comprises the following steps:
a. pretreatment: weighing a proper amount of scrap copper, repeatedly adsorbing the scrap copper for 3 times by using a magnet, then placing the scrap copper into a container filled with an impurity removing agent, performing ultrasonic treatment for 25min at 65 ℃, taking out the scrap copper, washing the scrap copper for 2 times by using water, and drying the scrap copper at 40 ℃ to obtain a scrap copper treatment product;
b. crushing: beating and crushing the scrap copper treatment product by using a forging hammer until the particle size of the particles is less than or equal to 30mm, and then taking out the deformed particles, plastic and other impurities to obtain scrap copper crushed materials;
c. refining: carrying out melt refining on scrap copper crushed aggregates at 1250 ℃ for 6h to obtain scrap copper melt;
d. slagging: adding a slagging agent into the scrap copper melt, refining at 1050 ℃ for 18min to generate slag, standing for 9min to enable the slag to float upwards, and fishing out the slag;
e. adjusting the copper content: d, detecting the components of the scrap copper melt processed in the step d, adjusting the components of the scrap copper melt according to the detection result, adding a proper amount of metal powder compatible with the Cu powder if the Cu content in the scrap copper melt is more than or equal to 59%, and adding a proper amount of red copper powder if the Cu content in the scrap copper melt is less than or equal to 58% so that the Cu content in the scrap copper melt is 58% -59% to obtain copper alloy melt;
f. forming and drawing: and (3) preserving the heat of the copper alloy molten liquid for 6 hours at 1150 ℃, then placing the molten liquid in a continuous casting crystallizer, cooling and cutting the molten liquid into sections to form a copper alloy crude product, and then placing the copper alloy crude product in a wire drawing machine for wire drawing and forming to obtain the copper rod.
The impurity removing agent is prepared by weighing glass beads, a surfactant and water, uniformly stirring and mixing, and the pH of the impurity removing agent is adjusted to 5.5 by using 20% (v/v) hydrochloric acid solution, wherein the content of each component is shown in the following table 1-1.
The slag former is prepared by weighing 25g of lime and 50g of quartz powder, and then uniformly stirring and mixing.
Example 4
The difference from the example 1 is that the impurity removing agent also comprises sodium alginate, and the content of each component is shown in the following table 1-1.
The impurity removing agent is prepared by weighing glass beads, surfactant, sodium alginate and water, stirring and mixing uniformly,
example 5
The difference from the example 1 is that the impurity removing agent also comprises alkanolamide, and the content of each component is shown in the following table 1-1.
The impurity removing agent is prepared by weighing glass beads, surfactant, alkanolamide and water, stirring and mixing uniformly,
example 6
The difference from the example 1 is that the impurity removing agent also comprises urea, and the content of each component is shown in the following table 1-1.
The impurity removing agent is prepared by weighing glass beads, surfactant, urea and water, stirring and mixing uniformly,
example 7
The application discloses a production process for producing copper bars by scrap copper, which comprises the following steps:
a. pretreatment: weighing a proper amount of scrap copper, repeatedly adsorbing for 2 times by using a magnet, then placing the scrap copper into a container filled with an impurity removing agent, performing ultrasonic treatment for 30min at 60 ℃, taking out the scrap copper, washing for 2 times by using water, and drying at 40 ℃ to obtain a scrap copper treatment product;
b. crushing: beating and crushing the scrap copper treatment product by using a forging hammer until the particle size of the particles is less than or equal to 30mm, and then taking out the deformed particles, plastic and other impurities to obtain scrap copper crushed materials;
c. refining: carrying out melt refining on scrap copper crushed aggregates for 6h at 1200 ℃ to obtain scrap copper melt;
d. slagging: adding a slagging agent into the scrap copper melt, refining at 1000 ℃ for 20min to generate slag, standing for 10min to enable the slag to float upwards, and fishing out the slag;
e. adjusting the copper content: d, detecting the components of the scrap copper melt processed in the step d, adjusting the components of the scrap copper melt according to the detection result, adding a proper amount of metal powder compatible with the Cu powder if the Cu content in the scrap copper melt is more than or equal to 59%, and adding a proper amount of red copper powder if the Cu content in the scrap copper melt is less than or equal to 58% so that the Cu content in the scrap copper melt is 58% -59% to obtain copper alloy melt;
f. forming and drawing: and (3) preserving the heat of the copper alloy molten liquid for 7 hours at 1100 ℃, then placing the copper alloy molten liquid in a continuous casting crystallizer, cooling and cutting the copper alloy molten liquid into sections to form a copper alloy crude product, and then placing the copper alloy crude product in a wire drawing machine for wire drawing and forming to obtain the copper rod.
The impurity removing agent is prepared by weighing glass beads, a surfactant, sodium alginate, alkanolamide, urea and water, uniformly stirring and mixing, wherein the pH of the impurity removing agent is adjusted to 5 by using 20% (v/v) hydrochloric acid solution, and the content of each component is shown in the following table 1-1.
The slag former is prepared by weighing 20g of lime and 40g of quartz powder, and then uniformly stirring and mixing.
Example 8
The application discloses a production process for producing copper bars by scrap copper, which comprises the following steps:
a. pretreatment: weighing a proper amount of scrap copper, repeatedly adsorbing the scrap copper for 3 times by using a magnet, then placing the scrap copper into a container filled with an impurity removing agent, performing ultrasonic treatment for 20min at 70 ℃, taking out the scrap copper, washing the scrap copper for 2 times by using water, and drying the scrap copper at 40 ℃ to obtain a scrap copper treatment product;
b. crushing: beating and crushing the scrap copper treatment product by using a forging hammer until the particle size of the particles is less than or equal to 30mm, and then taking out the deformed particles, plastic and other impurities to obtain scrap copper crushed materials;
c. refining: carrying out melt refining on scrap copper crushed materials at 1300 ℃ for 5h to obtain scrap copper melt;
d. slagging: adding a slagging agent into the scrap copper melt, refining at 1100 ℃ for 15min to generate slag, standing for 8min to enable the slag to float upwards, and fishing out the slag;
e. adjusting the copper content: d, detecting the components of the scrap copper melt processed in the step d, adjusting the components of the scrap copper melt according to the detection result, adding a proper amount of metal powder compatible with the Cu powder if the Cu content in the scrap copper melt is more than or equal to 59%, and adding a proper amount of red copper powder if the Cu content in the scrap copper melt is less than or equal to 58% so that the Cu content in the scrap copper melt is 58% -59% to obtain copper alloy melt;
f. forming and drawing: and (3) preserving the heat of the copper alloy molten liquid for 5 hours at 1200 ℃, then placing the copper alloy molten liquid in a continuous casting crystallizer, cooling and cutting the copper alloy molten liquid into sections to form a copper alloy crude product, and then placing the copper alloy crude product in a wire drawing machine for wire drawing and forming to obtain the copper rod.
The impurity removing agent is prepared by weighing glass beads, a surfactant, sodium alginate, alkanolamide, urea and water, uniformly stirring and mixing, wherein the pH of the impurity removing agent is adjusted to 6 by using 20% (v/v) hydrochloric acid solution, and the content of each component is shown in the following table 1-1.
The slag former is prepared by weighing 30g of lime and 60g of quartz powder and then uniformly stirring and mixing.
Example 9
The application discloses a production process for producing copper bars by scrap copper, which comprises the following steps:
a. pretreatment: weighing a proper amount of scrap copper, repeatedly adsorbing the scrap copper for 3 times by using a magnet, then placing the scrap copper into a container filled with an impurity removing agent, performing ultrasonic treatment for 25min at 65 ℃, taking out the scrap copper, washing the scrap copper for 2 times by using water, and drying the scrap copper at 40 ℃ to obtain a scrap copper treatment product;
b. crushing: beating and crushing the scrap copper treatment product by using a forging hammer until the particle size of the particles is less than or equal to 30mm, and then taking out the deformed particles, plastic and other impurities to obtain scrap copper crushed materials;
c. refining: carrying out melt refining on scrap copper crushed aggregates at 1250 ℃ for 6h to obtain scrap copper melt;
d. slagging: adding a slagging agent into the scrap copper melt, refining at 1050 ℃ for 18min to generate slag, standing for 9min to enable the slag to float upwards, and fishing out the slag;
e. adjusting the copper content: d, detecting the components of the scrap copper melt processed in the step d, adjusting the components of the scrap copper melt according to the detection result, adding a proper amount of metal powder compatible with the Cu powder if the Cu content in the scrap copper melt is more than or equal to 59%, and adding a proper amount of red copper powder if the Cu content in the scrap copper melt is less than or equal to 58% so that the Cu content in the scrap copper melt is 58% -59% to obtain copper alloy melt;
f. forming and drawing: and (3) preserving the heat of the copper alloy molten liquid for 6 hours at 1150 ℃, then placing the molten liquid in a continuous casting crystallizer, cooling and cutting the molten liquid into sections to form a copper alloy crude product, and then placing the copper alloy crude product in a wire drawing machine for wire drawing and forming to obtain the copper rod.
The impurity removing agent is prepared by weighing glass beads, a surfactant, sodium alginate, alkanolamide, urea and water, uniformly stirring and mixing, wherein the pH of the impurity removing agent is adjusted to 5.5 by using 20% (v/v) hydrochloric acid solution, and the content of each component is shown in the following table 1-2.
The slag former is prepared by weighing 25g of lime and 50g of quartz powder, and then uniformly stirring and mixing.
Example 10
The difference from example 4 is that sodium alginate was replaced with sodium chloride and the contents of each component are shown in tables 1-2 below.
Example 11
The difference from example 1 is that the pH of the impurity removing agent is 7, and the contents of each component are shown in tables 1 to 2 below.
Example 12
The difference from example 1 is that the pH of the impurity removing agent was adjusted to 3 with 20% (v/v) hydrochloric acid solution, and the contents of each component are shown in tables 1 to 2 below.
Example 13
The difference from example 5 is that the alkanolamide is replaced by ethanol and the contents of the components are shown in tables 1 to 2 below.
Comparative example
Comparative example 1
The difference from the example 1 is that the copper rod prepared by the production process that glass beads are not added in the impurity removing agent and the scrap copper is not subjected to ultrasonic treatment in the step a is used as a blank control group.
Comparative example 2
The difference from example 1 is that glass beads are not added to the impurity removing agent, and the contents of the components are shown in the following tables 1-2.
Comparative example 3
The difference from example 1 is that the scrap copper in step a was not subjected to ultrasonic treatment, and the contents of the respective components are shown in tables 1 to 2 below.
Comparative example 4
The difference from example 1 is that glass beads were replaced with silica, and the contents of the respective components are shown in tables 1 to 2 below.
TABLE 1-1 ingredient content of impurity remover (unit: g)
TABLE 1-2 ingredient content of impurity remover (unit: g)
Performance test
(1) Total amount of impurities: the copper rods obtained in examples 1 to 13 and comparative examples 1 to 4 were subjected to the chemical analysis method of copper and copper alloys part I according to Standard GB/T5121.1-2008: measurement of copper content ", the measurement results are shown in table 2 below.
(2) Corrosion resistance; the copper rods obtained in examples 1, 5 and 14 were measured according to the standard GB/T5096-.
TABLE 2 test results of examples and comparative examples
| Total amount of impurities/%) | Corrosion grade | |
| Example 1 | 0.45 | 2a |
| Example 2 | 0.42 | / |
| Example 3 | 0.43 | / |
| Example 4 | 0.35 | / |
| Example 5 | 0.42 | 1b |
| Example 6 | 0.39 | / |
| Example 7 | 0.28 | / |
| Example 8 | 0.26 | / |
| Example 9 | 0.26 | / |
| Example 10 | 0.43 | / |
| Example 11 | 0.41 | / |
| Example 12 | 0.46 | / |
| Example 13 | 0.43 | 2a |
| Comparative example 1 | 0.63 | / |
| Comparative example 2 | 0.57 | / |
| Comparative example 3 | 0.61 | / |
| Comparative example 4 | 0.52 | / |
In summary, the following conclusions can be drawn:
1. combining example 1 and comparative examples 1-4 with table 2, it can be seen that the addition of glass beads to the dedoping agent and the use of ultrasonication of scrap copper placed in the dedoping agent synergistically increased the purity of the resulting copper rods, probably due to: the glass beads continuously hit the scrap copper under the vibration of the ultrasound, the surfaces of the glass beads are oleophilic, and when the scrap copper is hit, a part of oil stains on the surfaces of the scrap copper can be taken away, so that the surface layer of the oil stains on the surfaces of the scrap copper is broken, the surfactant can conveniently permeate the oil stains and infiltrate the surfaces of the scrap copper, and the impurity removal effect of the impurity removal agent on the scrap copper is improved.
2. As can be seen from the combination of examples 1, 4 and 10 and Table 2, the addition of sodium alginate to the trash remover can improve the purity of the copper rod, which may be caused by: the viscosity of the sodium alginate in water is increased, and the sodium alginate is mixed with the emulsified oil stain and adheres to the oil stain and dust, so that the dispersion stability of the oil stain in the impurity removing agent can be improved, the secondary deposition of the oil stain or the dust on the surface of the scrap copper is reduced, and the impurity removing effect of the impurity removing agent is further improved.
3. As can be seen from the combination of examples 1-3 and 11-12 and Table 2, adjusting the pH of the stripping agent to 5-6 is advantageous in improving the purity of the resulting copper rod, probably because: the impurity removing agent is acidic, so that the combination between an oxide layer on the scrap copper and the scrap copper can be weakened, the subsequent oxide layer can be conveniently separated from the scrap copper under the impact of water, and in the pH value environment, sodium alginate and water are mixed to easily form gel, so that the viscosity of the impurity removing agent is improved, and oil stains and dust are adhered.
4. As can be seen from the combination of examples 1, 5 and 13 and Table 2, the addition of alkanolamides to the stripping agent improves the corrosion resistance of the resulting copper rod, which may be due to: the arc pair electrons on the nitrogen atom on the alkanolamide can form a coordination bond with the scrap copper, so that the arc pair electrons are adsorbed on the surface of the scrap copper, the contact of the scrap copper and a corrosion medium is blocked, and the corrosion of the scrap copper is inhibited.
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.
Claims (9)
1. A production process for producing copper bars by scrap copper is characterized by comprising the following steps:
a. pretreatment: weighing a proper amount of scrap copper, repeatedly adsorbing for 2-3 times by using a magnet, then placing the scrap copper in a container filled with an impurity removing agent, carrying out ultrasonic treatment for 20-30min, taking out the scrap copper, washing with water, and drying to obtain a scrap copper treatment product;
b. crushing: beating and crushing the scrap copper treatment product until the particle size of the particles is less than or equal to 30mm, and then taking out the deformed particles, plastic and other impurities to obtain scrap copper crushed materials;
c. refining: carrying out melting refining on scrap copper crushed aggregates to obtain scrap copper melt;
d. slagging: adding a slagging agent into the scrap copper melt for refining to generate slag, standing for 8-10min to enable the slag to float upwards, and fishing out the slag;
e. adjusting the copper content: d, detecting the components of the scrap copper melt processed in the step d, adjusting the components of the scrap copper melt according to the detection result, adding a proper amount of metal powder compatible with the scrap copper melt to enable the content of Cu in the scrap copper melt to be 58% -59%, and obtaining copper alloy melt;
f. forming and drawing: preserving the heat of the copper alloy molten liquid for a period of time, then placing the copper alloy molten liquid in a continuous casting crystallizer, cooling and cutting the copper alloy molten liquid into sections to form a copper alloy crude product, and then placing the copper alloy crude product in a wire drawing machine for wire drawing and forming to obtain a copper rod;
the impurity removing agent comprises, by weight, 5-8 parts of glass beads, 6-10 parts of a surfactant and 70-80 parts of water;
the slagging agent comprises 2-3 parts of lime and 4-6 parts of quartz.
2. The production process for producing the copper bar by the scrap copper according to claim 1, which is characterized in that: the impurity removing agent also comprises 3-4 parts of sodium alginate by weight.
3. The scrap copper production process for producing copper bars according to claim 2, characterized in that: the pH value of the impurity removing agent is 5-6.
4. The production process for producing the copper bar by the scrap copper according to claim 1, which is characterized in that: the impurity removing agent also comprises 2-3 parts of alkanolamide according to parts by weight.
5. The production process for producing the copper bar by the scrap copper according to claim 1, which is characterized in that: the impurity removing agent also comprises 2-3 parts of urea by weight.
6. The production process for producing the copper bar by the scrap copper according to claim 1, which is characterized in that: in the step a, ultrasound is carried out at 60-70 ℃.
7. The production process for producing the copper bar by the scrap copper according to claim 1, which is characterized in that: in the step c, the melting temperature is 1200-1300 ℃, and the melting time is 5-6 h.
8. The production process for producing the copper bar by the scrap copper according to claim 1, which is characterized in that: in the step d, refining is carried out for 15-20min at the temperature of 1000-1100 ℃.
9. The production process for producing the copper bar by the scrap copper according to claim 1, which is characterized in that: in the step f, the temperature is 1100-1200 ℃, and the time is 5-7 h.
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| CN115647730A (en) * | 2022-09-08 | 2023-01-31 | 诸暨永博铜业有限公司 | Production process and equipment for producing copper rod from scrap copper |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101831554A (en) * | 2010-06-10 | 2010-09-15 | 北京百慕合金有限责任公司 | Method for processing metal scraps |
| CN110893455A (en) * | 2018-09-12 | 2020-03-20 | 台州鑫宇铜业股份有限公司 | Method for producing copper alloy by scrap copper continuous casting |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101831554A (en) * | 2010-06-10 | 2010-09-15 | 北京百慕合金有限责任公司 | Method for processing metal scraps |
| CN110893455A (en) * | 2018-09-12 | 2020-03-20 | 台州鑫宇铜业股份有限公司 | Method for producing copper alloy by scrap copper continuous casting |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115647730A (en) * | 2022-09-08 | 2023-01-31 | 诸暨永博铜业有限公司 | Production process and equipment for producing copper rod from scrap copper |
| CN115647730B (en) * | 2022-09-08 | 2023-09-29 | 诸暨永博铜业有限公司 | Production process and equipment for producing copper bars from scrap copper |
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