CN113444990A - Electrolytic copper recrystallization heat treatment process - Google Patents
Electrolytic copper recrystallization heat treatment process Download PDFInfo
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- CN113444990A CN113444990A CN202110616179.3A CN202110616179A CN113444990A CN 113444990 A CN113444990 A CN 113444990A CN 202110616179 A CN202110616179 A CN 202110616179A CN 113444990 A CN113444990 A CN 113444990A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/08—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of copper or alloys based thereon
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C1/00—Electrolytic production, recovery or refining of metals by electrolysis of solutions
- C25C1/12—Electrolytic production, recovery or refining of metals by electrolysis of solutions of copper
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
The invention discloses an electrolytic copper recrystallization heat treatment process, which comprises the steps of electrolyzing crude copper to obtain electrolytic copper, and performing recrystallization heat treatment on the electrolytic copper, wherein the electrolytic copper is obtained by electrolyzing the crude copper, the electrolytic copper is placed in a heat treatment furnace to be uniformly heated at high temperature and simultaneously insulated for 0.5 to 1 hour, and then the electrolytic copper is placed in a cooling treatment box to be cooled and insulated for 2 to 3 hours, so that copper atoms can be recrystallized, the crystal grain structure and distribution of the electrolytic copper are changed, and meanwhile, layered crystals are formed in columnar crystals, so that the ductility of the electrolytic copper is improved, the physical performance of the electrolytic copper is improved, the use of personnel is ensured, the manufacture of related products is more convenient, and the development of related industries is ensured.
Description
Technical Field
The invention relates to the technical field of electrolytic copper, in particular to a recrystallization heat treatment process for electrolytic copper.
Background
The electrolytic copper is a copper plate produced by electrolysis, has extremely high purity and quality, and is widely applied to the fields of electricity, light industry, mechanical manufacturing, building industry, national defense industry and the like.
Heat treatment of metals refers to a hot working process of metals in the solid state by means of heating, holding and cooling to obtain the desired texture and properties.
At present, electrolytic copper produced by an electrolytic process has good performance, but cannot meet the development of the modern process on the aspect of physical performance, has poor ductility, is not beneficial to the use of personnel, and seriously influences the development of related industries.
Disclosure of Invention
The present invention aims at providing a recrystallization heat treatment process for electrolytic copper to solve the problems in the background art.
In order to achieve the purpose, the invention provides the following technical scheme: the electrolytic copper recrystallization heat treatment process comprises the following steps of electrolyzing raw copper to obtain electrolytic copper, and performing recrystallization heat treatment on the electrolytic copper, wherein the electrolytic copper recrystallization heat treatment process comprises the following steps:
s1, prefabrication: pre-preparing the crude copper into a thick plate to be used as an anode;
s2, preparation of electrolytic copper:
cathode: pure copper is used, and the pure copper is made into a sheet to be used as a cathode;
electrolysis: adding electrolyte into an electrolytic cell by using the electrolytic cell, inserting an anode made of crude copper and a cathode made of pure copper into the electrolyte, electrifying the anode and the cathode by direct current, dissolving copper in the anode into copper ions after electrifying, moving the copper ions to the cathode, and obtaining electrons after the copper ions reach the cathode so as to separate out electrolytic copper at the cathode;
s3, heating: placing the electrolytic copper obtained by electrolysis in a heat treatment furnace, uniformly heating the electrolytic copper at high temperature to about 600 ℃, and keeping the temperature unchanged for 0.5-1h when the temperature is heated to about 600 ℃;
s4, cooling: after the electrolytic copper is heated, the electrolytic copper is placed in a cooling treatment box to be cooled, the temperature is cooled to 30 ℃, and then the temperature is kept unchanged to be kept for 2-3 h;
s5, quality inspection: and (5) inspecting the cooled electrolytic copper, and inspecting whether the ductility of the electrolytic copper is qualified or not to obtain a finished product.
Preferably, the crude copper is prepared into a thick plate in advance and used as an anode, the pure copper is prepared into a thin plate in advance, and the anode and the cathode are matched to ensure the electrolysis.
Preferably, the electrolyte is prepared by mixing sulfuric acid and copper sulfate, under the action of direct current, copper on the anode loses electrons to generate copper ions, and precious metals and certain metals are insoluble in the electrolyte, so that anode mud is deposited at the bottom of the electrolytic tank and can be periodically recycled; copper ions in the solution can be preferentially separated out on a cathode, other alkali metals with negative potential cannot be separated out on the cathode and are left in the electrolyte, the electrolyte is removed when being purified periodically, a part of the electrolyte is extracted every day to carry out decoppering and impurity removing treatment according to the condition of impurities in the electrolyte, the concentration of copper, acid and impurities in the electrolyte is not more than a limit value, and sulfuric acid and additives are added into the electrolyte to ensure the components of the electrolyte and adjust the physical property of cathode copper.
Preferably, when the electrolytic copper is produced in the electrolytic bath, the distance between the anode and the cathode can be adjusted, and meanwhile, when the anode and the cathode are electrified, the potential difference between the anode and the cathode can be properly adjusted, so that the produced electrolytic copper is ensured to be purer.
Preferably, the produced electrolytic copper is heated to 600 ℃ in a heat treatment furnace and is kept at the temperature for 0.5 to 1 hour, so that the grain structure and distribution of the electrolytic copper are changed.
Preferably, the electrolytic copper is placed in a cooling treatment box to be cooled to 30 ℃ and kept for 2-3 hours, so that copper atoms in the electrolytic copper can be recrystallized, the electrolytic copper forms layered crystals in columnar crystals, and the ductility of the electrolytic copper is improved.
Preferably, after the electrolytic copper is cooled and recrystallized, the treated electrolytic copper is subjected to quality inspection, the ductility of the electrolytic copper is checked, and the quality of a finished product is ensured.
The invention has the technical effects and advantages that:
obtain electrolytic copper through carrying out electrolysis operation to blister copper, electrolytic copper is arranged in heat treatment furnace high temperature even heating and is kept warm 0.5 to 1 hour simultaneously, electrolytic copper arranges cooling treatment incasement cooling in afterwards and keeps warm 2 to 3 hours, can make copper atom recrystallization, and then change electrolytic copper crystalline grain structure and distribution, form the lamellar crystal in the column crystallization simultaneously, and then improve electrolytic copper's ductility, the physical properties of electrolytic copper has been improved, guarantee personnel's use, relevant product preparation is more convenient, the development of relevant trade has been guaranteed.
Drawings
FIG. 1 is a schematic view of the dyeing process of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides an electrolytic copper recrystallization heat treatment process as shown in figure 1, which comprises the following steps of electrolyzing crude copper to obtain electrolytic copper, and carrying out recrystallization heat treatment on the electrolytic copper, wherein the recrystallization heat treatment process of the electrolytic copper is as follows:
s1, prefabrication: pre-preparing the crude copper into a thick plate to be used as an anode;
s2, preparation of electrolytic copper:
cathode: pure copper is used, and the pure copper is made into a sheet to be used as a cathode;
electrolysis: adding electrolyte into an electrolytic cell by using the electrolytic cell, inserting an anode made of crude copper and a cathode made of pure copper into the electrolyte, electrifying the anode and the cathode by direct current, dissolving copper in the anode into copper ions after electrifying, moving the copper ions to the cathode, and obtaining electrons after the copper ions reach the cathode so as to separate out electrolytic copper at the cathode;
s3, heating: placing the electrolytic copper obtained by electrolysis in a heat treatment furnace, uniformly heating the electrolytic copper at high temperature to about 600 ℃, and keeping the temperature unchanged for 0.5-1h when the temperature is heated to about 600 ℃;
s4, cooling: after the electrolytic copper is heated, the electrolytic copper is placed in a cooling treatment box to be cooled, the temperature is cooled to 30 ℃, and then the temperature is kept unchanged to be kept for 2-3 h;
s5, quality inspection: and (5) inspecting the cooled electrolytic copper, and inspecting whether the ductility of the electrolytic copper is qualified or not to obtain a finished product.
The crude copper is made into thick plates in advance and used as an anode, the pure copper is made into thin plates in advance, the anode is matched with a cathode to ensure the electrolysis, the electrolyte is made by mixing sulfuric acid and copper sulfate, under the action of direct current, the copper on the anode can lose electrons to generate copper ions, and noble metals and certain metals are insoluble in the electrolyte, become anode mud and precipitate at the bottom of the electrolytic tank and can be recycled periodically; copper ions in the solution can be preferentially separated out on a cathode, other alkali metals with more negative potential can not be separated out on the cathode and are left in the electrolyte, the electrolyte is removed when being purified periodically, partial electrolyte is extracted every day to carry out decoppering and decoppering treatment according to the condition of impurities in the electrolyte, the concentration of copper, acid and impurities in the electrolyte is ensured not to exceed the limit value, in order to ensure the components of the electrolyte and adjust the physical property of cathode copper, sulfuric acid and additives are required to be added into the electrolyte, when electrolytic copper is produced in an electrolytic bath, the distance between an anode and the cathode can be adjusted, meanwhile, when the anode and the cathode are electrified, the potential difference between the anode and the cathode can be properly adjusted to ensure that the produced electrolytic copper is purer, the produced electrolytic copper is heated to 600 ℃ in a heat treatment furnace and is kept for 0.5-1 hour, thereby the grain structure and the distribution of the electrolytic copper are changed, the electrolytic copper is placed in a cooling treatment tank to be cooled to 30 ℃, and simultaneously, preserving the heat for 2-3 hours, so that copper atoms in the electrolytic copper can be recrystallized, the electrolytic copper forms layered crystals in the columnar crystals, the ductility of the electrolytic copper is further improved, after the electrolytic copper is cooled and recrystallized, the treated electrolytic copper is subjected to quality inspection, the ductility of the electrolytic copper is inspected, and the quality of a finished product is ensured.
The working principle of the invention is as follows: pre-shaping raw copper, making the raw copper into a thick plate serving as an anode for use, then making pure copper into a thin plate serving as a cathode for use, placing the anode and the cathode in an electrolytic tank, filling the electrolytic tank with electrolyte, mixing the electrolyte with sulfuric acid and copper sulfate, then switching on direct current between the anode and the cathode, changing copper on the anode into copper ions after losing electrons, moving the copper ions in the electrolyte to the cathode, separating electrons obtained after the copper ions reach the cathode to form copper, thus obtaining electrolytic copper, placing the prepared electrolytic copper semi-finished product in a heat treatment furnace for heating treatment, ensuring that the heat treatment furnace is uniformly heated at high temperature, keeping the temperature at 600 ℃ for 0.5-1 hour, then placing the heated electrolytic copper in a cooling treatment box for cooling treatment, reducing the temperature to 30 ℃, then keeping the temperature unchanged for cooling for 2-3 hours, at the moment, the crystal grain structure and distribution in the electrolytic copper are changed, and layered crystals are formed in the columnar crystals, so that the recrystallization of copper atoms is realized, the physical property of the electrolytic copper is enhanced, the ductility of the electrolytic copper is improved, the cooled electrolytic copper is tested, the physical property of the cooled electrolytic copper is tested, and if the physical property of the electrolytic copper reaches the standard, the electrolytic copper can be reserved for processing in various industries.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The electrolytic copper recrystallization heat treatment process comprises crude copper, and is characterized in that the crude copper is electrolyzed to obtain electrolytic copper, the electrolytic copper can be subjected to recrystallization heat treatment, and the electrolytic copper recrystallization heat treatment process comprises the following steps:
s1, prefabrication: pre-preparing the crude copper into a thick plate to be used as an anode;
s2, preparation of electrolytic copper:
cathode: pure copper is used, and the pure copper is made into a sheet to be used as a cathode;
electrolysis: adding electrolyte into an electrolytic cell by using the electrolytic cell, inserting an anode made of crude copper and a cathode made of pure copper into the electrolyte, electrifying the anode and the cathode by direct current, dissolving copper in the anode into copper ions after electrifying, moving the copper ions to the cathode, and obtaining electrons after the copper ions reach the cathode so as to separate out electrolytic copper at the cathode;
s3, heating: placing the electrolytic copper obtained by electrolysis in a heat treatment furnace, uniformly heating the electrolytic copper at high temperature to about 600 ℃, and keeping the temperature unchanged for 0.5-1h when the temperature is heated to about 600 ℃;
s4, cooling: after the electrolytic copper is heated, the electrolytic copper is placed in a cooling treatment box to be cooled, the temperature is cooled to 30 ℃, and then the temperature is kept unchanged to be kept for 2-3 h;
s5, quality inspection: and (5) inspecting the cooled electrolytic copper, and inspecting whether the ductility of the electrolytic copper is qualified or not to obtain a finished product.
2. The electrolytic copper recrystallization heat treatment process according to claim 1, wherein the blister copper is preformed into a thick plate to be used as an anode, the pure copper is preformed into a thin plate, and the anode and the cathode are matched to ensure the electrolysis.
3. The electrolytic copper recrystallization heat treatment process according to claim 1, wherein the electrolyte is made by mixing sulfuric acid and copper sulfate, under the action of direct current, copper on the anode loses electrons to generate copper ions, and precious metals and some metals are insoluble in the electrolyte to become anode mud which is deposited on the bottom of the electrolytic tank and can be recycled periodically; copper ions in the solution can be preferentially separated out on a cathode, other alkali metals with negative potential cannot be separated out on the cathode and are left in the electrolyte, the electrolyte is removed when being purified periodically, a part of the electrolyte is extracted every day to carry out decoppering and impurity removing treatment according to the condition of impurities in the electrolyte, the concentration of copper, acid and impurities in the electrolyte is not more than a limit value, and sulfuric acid and additives are added into the electrolyte to ensure the components of the electrolyte and adjust the physical property of cathode copper.
4. The electrolytic copper recrystallization heat treatment process according to claim 1, wherein the distance between the anode and the cathode is adjustable when the electrolytic copper is produced in the electrolytic bath, and the potential difference between the anode and the cathode is properly adjusted when the anode and the cathode are energized to ensure that the produced electrolytic copper is purer.
5. The electrolytic copper recrystallization heat treatment process according to claim 1, wherein the produced electrolytic copper is heated to 600 ℃ in a heat treatment furnace and maintained for 0.5 to 1 hour, thereby changing the grain structure and distribution of the electrolytic copper.
6. The electrolytic copper recrystallization heat treatment process according to claim 1, wherein the electrolytic copper is placed in a cooling treatment box to be cooled to 30 ℃ and kept warm for 2-3 hours, so that copper atoms in the electrolytic copper can be recrystallized, the electrolytic copper forms lamellar crystals in columnar crystals, and the ductility of the electrolytic copper is improved.
7. The electrolytic copper recrystallization heat treatment process according to claim 1, wherein after the electrolytic copper is cooled and recrystallized, the treated electrolytic copper is subjected to quality inspection to check the ductility of the electrolytic copper and ensure the quality of the finished product.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007294923A (en) * | 2006-03-31 | 2007-11-08 | Nikko Kinzoku Kk | Manufacturing method of copper strip or copper foil having excellent strength, electric conductivity, and bendability, and electronic component using the same |
| CN104878415A (en) * | 2015-05-05 | 2015-09-02 | 东莞市蓝姆材料科技有限公司 | Preparation method of ultra-thin high-tenacity copper foil |
| CN106104876A (en) * | 2014-03-20 | 2016-11-09 | 日进材料股份有限公司 | Electrolytic copper foil, the collector comprising this electrolytic copper foil, negative electrode and lithium battery |
| CN108315566A (en) * | 2018-01-16 | 2018-07-24 | 张家港市佰坤物资有限公司 | A kind of refined copper production technology |
| CN108505076A (en) * | 2017-02-24 | 2018-09-07 | 南亚塑胶工业股份有限公司 | Electrolytic solution, electrolytic copper foil and method for producing same |
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- 2021-06-02 CN CN202110616179.3A patent/CN113444990A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007294923A (en) * | 2006-03-31 | 2007-11-08 | Nikko Kinzoku Kk | Manufacturing method of copper strip or copper foil having excellent strength, electric conductivity, and bendability, and electronic component using the same |
| CN106104876A (en) * | 2014-03-20 | 2016-11-09 | 日进材料股份有限公司 | Electrolytic copper foil, the collector comprising this electrolytic copper foil, negative electrode and lithium battery |
| CN104878415A (en) * | 2015-05-05 | 2015-09-02 | 东莞市蓝姆材料科技有限公司 | Preparation method of ultra-thin high-tenacity copper foil |
| CN108505076A (en) * | 2017-02-24 | 2018-09-07 | 南亚塑胶工业股份有限公司 | Electrolytic solution, electrolytic copper foil and method for producing same |
| CN108315566A (en) * | 2018-01-16 | 2018-07-24 | 张家港市佰坤物资有限公司 | A kind of refined copper production technology |
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Application publication date: 20210928 |