CN114150349A - Method for reducing silver content in cathode copper - Google Patents
Method for reducing silver content in cathode copper Download PDFInfo
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- CN114150349A CN114150349A CN202111398434.8A CN202111398434A CN114150349A CN 114150349 A CN114150349 A CN 114150349A CN 202111398434 A CN202111398434 A CN 202111398434A CN 114150349 A CN114150349 A CN 114150349A
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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
- C25C7/00—Constructional parts, or assemblies thereof, of cells; Servicing or operating of cells
- C25C7/06—Operating or servicing
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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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Abstract
The invention provides a method for reducing the content of silver in cathode copper, which relates to the technical field of copper electrolytic refining and comprises the following steps: s1, pumping the electrolyte from the circulating tank to a high-level tank through a plate heat exchanger by a pump; s2, enabling the electrolyte in the head tank to automatically flow into the electrolytic tank; s3, shunting the electrolyte in the electrolytic cell to a circulation cell and a supernatant storage tank; s4, removing particles of the electrolyte; s5, circulation of the electrolyte, the invention separates the suspended matters in the electrolyte in time by carrying out circulation filter pressing on the copper electrolyte, thereby reducing the silver entering the cathode copper in the form of discharge precipitation and mechanical adhesion, and generating important change for increasing the production benefit of copper electrolysis.
Description
Technical Field
The invention relates to the technical field of electrolytic refining of copper, in particular to a method for reducing the content of silver in cathode copper.
Background
The control requirement of the national standard (GB/T467-2010) of cathode copper on the content of silver in A-grade copper (Cu-CATH-1) is lower than 0.0025%, the silver is taken as rare and noble metal, the price of the silver is dozens of times higher than that of the copper, but the silver is not priced when the cathode copper is sold outside, so the higher the content of the silver in the cathode copper is, the greater the economic loss of an enterprise is, and the content of the silver in the cathode copper needs to be reduced as much as possible in the electrolytic production of the copper.
The copper concentrate is smelted and refined by a fire method to produce anode copper, silver mainly exists in the form of supersaturated solid solution in the anode copper, components (platinum group elements such As silver, gold and the like) in the solid solution are dissolved along with the anode copper along with the continuous dissolution of an anode plate in the production process of electrolytic refining of copper, most of the silver and Cu-Ag-Pb-As-Te form complex oxides to enter anode mud, the silver entering the electrolyte in the form of ions is discharged and separated out on the surface of cathode copper under the action of an electric field and a flow field, the other part of the silver exists in the electrolyte in the form of colloidal particles, and most of the colloidal particles carry positive charges and are gathered near a cathode to enter the cathode copper in the form of mechanical adhesion under the action of the electric field.
According to statistical analysis, in the copper electrolysis production process, about 95% of silver enters into anode mud, the remaining 45% of silver enters into cathode copper, different parts of the cathode copper are sampled and analyzed, the lower part silver content is higher than the upper part, which also indicates that the mechanical adhesion ratio of the silver entering into the cathode copper is higher than that of discharge precipitation, so that the silver is reduced to exist in the electrolyte in the form of colloidal particles to reduce the important direction of the silver content of the cathode copper, and therefore, the invention provides a method for reducing the silver content in the cathode copper.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provide a method for reducing the content of silver in cathode copper.
In order to achieve the purpose, the invention adopts the following technical scheme: a method for reducing the silver content in cathode copper comprises the following specific steps:
s1, pumping the electrolyte from the circulating tank to a high-level tank through a plate heat exchanger by a pump;
s2, enabling the electrolyte in the head tank to automatically flow into the electrolytic tank;
s3, shunting the electrolyte in the electrolytic cell to a circulation cell and a supernatant storage tank;
s4, removing particles of the electrolyte;
s5, circulation of electrolyte: and pumping the electrolyte in the circulating tank into the elevated tank again through the circulating pump, and repeatedly circulating until the content of silver in the electrolyte is reduced to the standard content.
As a preferred embodiment, in step S3, the specific steps are: a branch pipeline is branched from a main pipeline between the electrolytic cell and the circulating tank, the electrolytic cell is communicated with the supernatant storage tank through the branch pipeline, and a valve is arranged on the branch pipeline and used for controlling the closing of the branch pipeline, so that electrolyte can flow into the circulating tank and the supernatant storage tank through the main pipeline or the branch pipeline respectively.
As a preferred embodiment, a circulating pump and a plate heat exchanger are arranged on a pipeline between the circulating tank and the elevated tank, an inlet end of the circulating pump is fixedly communicated with a liquid outlet end of the circulating tank through a pipeline, an inlet end of the plate heat exchanger is fixedly communicated with an output end of the circulating pump through a pipeline, and an outlet end of the plate heat exchanger is communicated with a liquid inlet end of the elevated tank through a pipeline.
As a preferred embodiment, the supernatant storage tank is communicated with the circulating tank through a branch pipeline, a circulating pump and a plate-and-frame filter press are sequentially arranged on the branch pipeline, an inlet end and an outlet end of the circulating pump are respectively communicated with a liquid outlet end of the supernatant storage tank and an inlet end of the plate-and-frame filter press through the branch pipeline, and a liquid inlet end of the circulating tank is communicated with an outlet end of the plate-and-frame filter press through the branch pipeline.
In a preferred embodiment, the plate-and-frame filter press is a GLC plate-and-frame heat exchanger, and the plate-and-frame filter press is an 800-type automatic filter press.
As a preferred embodiment, the step S4 is specifically: when the electrolyte flows back to the circulating tank from the electrolytic tank, part of the electrolyte reaches a supernatant storage tank, the liquid in the supernatant storage tank is continuously pumped into a plate-and-frame filter press for filter pressing, suspended particles in the electrolyte are separated, and the liquid after filter pressing directly flows back to the circulating tank.
Compared with the prior art, the invention has the advantages and positive effects that,
the invention separates the suspended matters in the electrolyte in time by performing circulating filter pressing on the copper electrolyte, thereby reducing the silver entering the cathode copper in the forms of discharge precipitation and mechanical adhesion and generating important change for increasing the production benefit of copper electrolysis.
Drawings
FIG. 1 is a flow chart of a method for reducing the silver content in cathode copper according to 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.
Example 1
As shown in fig. 1, the present invention provides a technical solution: a method for reducing the silver content in cathode copper comprises the following specific steps:
s1, pumping the electrolyte from the circulating tank to a high-level tank through a plate heat exchanger by a pump;
s2, enabling the electrolyte in the head tank to automatically flow into the electrolytic tank;
s3, shunting the electrolyte in the electrolytic cell to a circulation cell and a supernatant storage tank;
s4, removing particles of the electrolyte;
s5, circulation of electrolyte: and pumping the electrolyte in the circulating tank into the elevated tank again through the circulating pump, and repeatedly circulating until the content of silver in the electrolyte is reduced to the standard content.
Wherein, in the step S3, the method specifically includes: a branch pipeline is branched from a main pipeline between the electrolytic cell and the circulating tank, the electrolytic cell is communicated with the supernatant storage tank through the branch pipeline, and a valve is arranged on the branch pipeline and used for controlling the closing of the branch pipeline, so that electrolyte can flow into the circulating tank and the supernatant storage tank through the main pipeline or the branch pipeline respectively.
The circulating pump and the plate heat exchanger are arranged on the pipeline between the circulating tank and the elevated tank, the inlet end of the circulating pump is fixedly communicated with the liquid outlet end of the circulating tank through the pipeline, the inlet end of the plate heat exchanger is fixedly communicated with the output end of the circulating pump through the pipeline, and the outlet end of the plate heat exchanger is communicated with the liquid inlet end of the elevated tank through the pipeline.
The supernatant storage tank is communicated with the circulating tank through a branch pipeline, a circulating pump and a plate-and-frame filter press are sequentially arranged on the branch pipeline, the inlet end and the outlet end of the circulating pump are respectively communicated with the liquid outlet end of the supernatant storage tank and the inlet end of the plate-and-frame filter press through the branch pipeline, and the liquid inlet end of the circulating tank is communicated with the outlet end of the plate-and-frame filter press through the branch pipeline.
The plate heat exchanger is a GLC type plate heat exchanger, and the plate-and-frame filter press is an 800-type automatic filter press.
Wherein, the step S4 specifically includes: when the electrolyte flows back to the circulating tank from the electrolytic tank, part of the electrolyte reaches a supernatant storage tank, the liquid in the supernatant storage tank is continuously pumped into a plate-and-frame filter press for filter pressing, suspended particles in the electrolyte are separated, and the liquid after filter pressing directly flows back to the circulating tank.
Comparative example 1
This example is substantially the same as the method of example 1 provided, with the main differences being: in step S3, the electrolyte in the electrolytic cell is not diverted to the circulation tank and the supernatant storage tank.
Comparative example 2
This example is substantially the same as the method of example 1 provided, with the main differences being: in step S3, no valve is set.
Comparative example 3
This example is substantially the same as the method of example 1 provided, with the main differences being: in step S4, a plate and frame filter press is not used.
Performance testing
The chloride ion concentration of the method for reducing the silver content in the cathode copper provided in example 1 and comparative examples 1 to 3 and the silver content in the cathode copper were taken in equal amounts:
| concentration of chloride ion | Silver content in cathode copper | |
| Example 1 | 40mg/L | 7.4ppm |
| Comparative example 1 | 65mg/L | 12ppm |
| Comparative example 2 | 72mg/L | 8.5ppm |
| Comparative example 3 | 73mg/L | 9.3ppm |
By analyzing the relevant data in the tables, the method for reducing the silver content in the cathode copper comprises the following specific steps:
s1, pumping the electrolyte from the circulating tank to a high-level tank through a plate heat exchanger by a pump;
s2, enabling the electrolyte in the head tank to automatically flow into the electrolytic tank;
s3, shunting the electrolyte in the electrolytic cell to a circulation cell and a supernatant storage tank;
s4, removing particles of the electrolyte;
s5, circulation of electrolyte: and pumping the electrolyte in the circulating tank into the elevated tank again through the circulating pump, and repeatedly circulating until the content of silver in the electrolyte is reduced to the standard content.
Wherein, in the step S3, the method specifically includes: a branch pipeline is branched from a main pipeline between the electrolytic cell and the circulating tank, the electrolytic cell is communicated with the supernatant storage tank through the branch pipeline, and a valve is arranged on the branch pipeline and used for controlling the closing of the branch pipeline, so that electrolyte can flow into the circulating tank and the supernatant storage tank through the main pipeline or the branch pipeline respectively.
The circulating pump and the plate heat exchanger are arranged on the pipeline between the circulating tank and the elevated tank, the inlet end of the circulating pump is fixedly communicated with the liquid outlet end of the circulating tank through the pipeline, the inlet end of the plate heat exchanger is fixedly communicated with the output end of the circulating pump through the pipeline, and the outlet end of the plate heat exchanger is communicated with the liquid inlet end of the elevated tank through the pipeline.
The supernatant storage tank is communicated with the circulating tank through a branch pipeline, a circulating pump and a plate-and-frame filter press are sequentially arranged on the branch pipeline, the inlet end and the outlet end of the circulating pump are respectively communicated with the liquid outlet end of the supernatant storage tank and the inlet end of the plate-and-frame filter press through the branch pipeline, and the liquid inlet end of the circulating tank is communicated with the outlet end of the plate-and-frame filter press through the branch pipeline.
The plate heat exchanger is a GLC type plate heat exchanger, and the plate-and-frame filter press is an 800-type automatic filter press.
Wherein, the step S4 specifically includes: when the electrolyte flows back to the circulating tank from the electrolytic tank, part of the electrolyte reaches a supernatant storage tank, the liquid in the supernatant storage tank is continuously pumped into a plate-and-frame filter press for filter pressing, suspended particles in the electrolyte are separated, and the liquid after filter pressing directly flows back to the circulating tank.
In the invention: a branch is led out from a main return liquid pipeline of copper electrolysis, the branch is led into a supernatant storage tank, when electrolyte flows back to a circulating tank from an electrolytic tank, a part of the electrolyte flows back to the supernatant storage tank, the liquid in the supernatant storage tank is continuously pumped into a plate-and-frame filter press for filter pressing, suspended particles in the electrolyte are separated, and the filter-pressed liquid directly flows back to the circulating tank.
The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention in other forms, and any person skilled in the art may apply the above modifications or changes to the equivalent embodiments with equivalent changes, without departing from the technical spirit of the present invention, and any simple modification, equivalent change and change made to the above embodiments according to the technical spirit of the present invention still belong to the protection scope of the technical spirit of the present invention.
Claims (6)
1. A method for reducing the silver content in cathode copper is characterized in that: the method for reducing the silver content in the cathode copper comprises the following specific steps:
s1, pumping the electrolyte from the circulating tank to a high-level tank through a plate heat exchanger by a pump;
s2, enabling the electrolyte in the head tank to automatically flow into the electrolytic tank;
s3, shunting the electrolyte in the electrolytic cell to a circulation cell and a supernatant storage tank;
s4, removing particles of the electrolyte;
s5, circulation of electrolyte: and pumping the electrolyte in the circulating tank into the elevated tank again through the circulating pump, and repeatedly circulating until the content of silver in the electrolyte is reduced to the standard content.
2. The method of claim 1, wherein the silver content of the cathode copper is reduced by: the step S3 specifically includes: a branch pipeline is branched from a main pipeline between the electrolytic cell and the circulating tank, the electrolytic cell is communicated with the supernatant storage tank through the branch pipeline, and a valve is arranged on the branch pipeline and used for controlling the closing of the branch pipeline, so that electrolyte can flow into the circulating tank and the supernatant storage tank through the main pipeline or the branch pipeline respectively.
3. The method of claim 1, wherein the silver content of the cathode copper is reduced by: the circulating pump and the plate heat exchanger are arranged on the pipeline between the circulating tank and the elevated tank, the inlet end of the circulating pump is fixedly communicated with the liquid outlet end of the circulating tank through the pipeline, the inlet end of the plate heat exchanger is fixedly communicated with the output end of the circulating pump through the pipeline, and the outlet end of the plate heat exchanger is communicated with the liquid inlet end of the elevated tank through the pipeline.
4. The method of claim 1, wherein the silver content of the cathode copper is reduced by: the supernatant storage tank is communicated with the circulating tank through a branch pipeline, a circulating pump and a plate-and-frame filter press are sequentially arranged on the branch pipeline, the inlet end and the outlet end of the circulating pump are respectively communicated with the liquid outlet end of the supernatant storage tank and the inlet end of the plate-and-frame filter press through the branch pipeline, and the liquid inlet end of the circulating tank is communicated with the outlet end of the plate-and-frame filter press through the branch pipeline.
5. The method of claim 1, wherein the silver content of the cathode copper is reduced by: the plate type heat exchanger is a GLC type plate heat exchanger, and the plate type filter press is an 800 type automatic filter press.
6. The method of claim 1, wherein the silver content of the cathode copper is reduced by: the step S4 specifically includes: when the electrolyte flows back to the circulating tank from the electrolytic tank, part of the electrolyte reaches a supernatant storage tank, the liquid in the supernatant storage tank is continuously pumped into a plate-and-frame filter press for filter pressing, suspended particles in the electrolyte are separated, and the liquid after filter pressing directly flows back to the circulating tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111398434.8A CN114150349A (en) | 2021-11-19 | 2021-11-19 | Method for reducing silver content in cathode copper |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111398434.8A CN114150349A (en) | 2021-11-19 | 2021-11-19 | Method for reducing silver content in cathode copper |
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| CN114150349A true CN114150349A (en) | 2022-03-08 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2084468A5 (en) * | 1970-03-11 | 1971-12-17 | Environment One Corp | |
| JP2004243169A (en) * | 2003-02-12 | 2004-09-02 | Fujikasui Engineering Co Ltd | Desulfurization method for waste gas by double decomposition method |
| CN103334123A (en) * | 2013-07-24 | 2013-10-02 | 阳谷祥光铜业有限公司 | Copper electrolysis system and running method |
| CN205741226U (en) * | 2016-03-21 | 2016-11-30 | 铜陵有色金属集团股份有限公司金冠铜业分公司 | The preliminary clearning system of copper electrolyte |
| CN206015114U (en) * | 2016-08-31 | 2017-03-15 | 贵溪市鑫浩泰铜业有限公司 | A kind of copper sulfate bath liquid circulating device |
-
2021
- 2021-11-19 CN CN202111398434.8A patent/CN114150349A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2084468A5 (en) * | 1970-03-11 | 1971-12-17 | Environment One Corp | |
| JP2004243169A (en) * | 2003-02-12 | 2004-09-02 | Fujikasui Engineering Co Ltd | Desulfurization method for waste gas by double decomposition method |
| CN103334123A (en) * | 2013-07-24 | 2013-10-02 | 阳谷祥光铜业有限公司 | Copper electrolysis system and running method |
| CN205741226U (en) * | 2016-03-21 | 2016-11-30 | 铜陵有色金属集团股份有限公司金冠铜业分公司 | The preliminary clearning system of copper electrolyte |
| CN206015114U (en) * | 2016-08-31 | 2017-03-15 | 贵溪市鑫浩泰铜业有限公司 | A kind of copper sulfate bath liquid circulating device |
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