CN113005291A - Scrap copper refining process - Google Patents

Scrap copper refining process Download PDF

Info

Publication number
CN113005291A
CN113005291A CN202110012001.8A CN202110012001A CN113005291A CN 113005291 A CN113005291 A CN 113005291A CN 202110012001 A CN202110012001 A CN 202110012001A CN 113005291 A CN113005291 A CN 113005291A
Authority
CN
China
Prior art keywords
copper
waste
refined
time
granular
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202110012001.8A
Other languages
Chinese (zh)
Inventor
邱小华
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to CN202110012001.8A priority Critical patent/CN113005291A/en
Publication of CN113005291A publication Critical patent/CN113005291A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
    • C22B7/001—Dry processes
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B1/00—Preliminary treatment of ores or scrap
    • C22B1/005—Preliminary treatment of scrap
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B13/00—Obtaining lead
    • C22B13/02—Obtaining lead by dry processes
    • C22B13/025—Recovery from waste materials
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B15/00—Obtaining copper
    • C22B15/0026—Pyrometallurgy
    • C22B15/0028—Smelting or converting
    • C22B15/003—Bath smelting or converting
    • 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
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Processing Of Solid Wastes (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

The utility model relates to a scrap copper refines technology relates to metal recovery technical field to it is lower and the problem of waste gas polluted air among the recovery process to solve recovery copper purity among the correlation technique. The method comprises the following steps: converting gaseous lead into lead dust when meeting oxygen through oxygen in waste gas so as to recover the lead dust, spraying alkali liquor into an exhaust port after the gaseous lead passes through the oxygen so as to react sulfide with the alkali liquor, and removing sulfur in exhaust gas; and mixing the copper oxide with a mixture of ammonium hydroxide and ammonium bicarbonate, and performing electrolytic neutralization and zinc replacement electrolysis on the copper to obtain high-purity recovered copper. Therefore, the pollution of lead and sulfide in the waste gas to the air is reduced based on oxygen introduction and alkali liquor spraying to the waste gas, and the purity of the recovered copper is improved based on the mixture of ammonium hydroxide and ammonium bicarbonate, electrolysis operation, replacement operation and the like.

Description

Scrap copper refining process
Technical Field
The disclosure relates to the technical field of metal recovery, in particular to a scrap copper refining process.
Background
In life and industry, some waste copper is generated due to scrapping of some electronic products, for example, in scrapped transformers, there are coil copper wires used as transformer coils, and for example, there are red copper wires in discarded electric wire cores. The recycling of the waste copper can effectively promote the reuse of the copper. However, in addition to a large amount of metallic copper, it also contains a certain amount of impurities such as iron, aluminum, sand, oil stains, and the like. Because the waste copper is difficult to treat, most of the waste copper is treated in a simple mode and then sold, so that certain pollution is caused to the environment, the comprehensive utilization efficiency of resources in the waste copper is low, and the valuable components such as metal copper and the like are lost. In order to recover valuable metals in the waste copper scraps, manufacturers have used iron removal, calcination and other technical processes to treat the waste copper scraps and sell the treated waste copper scraps as raw materials, although the processes are simple, the pollution is serious, the aim of comprehensively recycling resources cannot be achieved, and the waste copper products contain harmful substances such as lead, so that a large amount of harmful gas is generated during the smelting of the waste copper, the health of workers is harmed, and the environment is polluted.
Disclosure of Invention
The utility model aims at providing a scrap copper refines technology, solves the problem that retrieves the lower and recovery in-process waste gas air pollution of copper purity among the correlation technique, and then can reduce and retrieve the copper waste in-process, lead and sulphide are to the pollution of air in the waste gas to and improve and retrieve copper purity, improve the reuse rate of copper.
In order to achieve the above object, a first aspect of the present disclosure provides a scrap copper refining process, including:
crushing waste copper wires to be refined, which are wrapped in plastics, into granular waste impure copper to be refined through a crusher, and putting the granular waste impure copper to be refined into a jigger for flotation to obtain waste copper granules, wherein a filter screen with the diameter of a filter hole smaller than or equal to 30mm is installed in the jigger to obtain granular copper with the diameter of the granule smaller than or equal to 30 mm;
adding the waste copper particles into a smelting furnace, heating, oxidizing and refining to obtain copper oxide, introducing oxygen into an exhaust port of the smelting furnace to convert gaseous lead into lead dust when meeting the oxygen so as to recover the lead dust, spraying alkali liquor into the exhaust port after the oxygen so as to react sulfide with the alkali liquor and remove sulfur in exhaust gas;
crushing the copper oxide powder to 40-60 meshes, adding a mixture of ammonium hydroxide and ammonium bicarbonate into a stirring reaction kettle, starting the stirring reaction kettle, and starting stirring timing, wherein the stirring time is 30-40 min;
under the condition that the stirring time is up, introducing steam at 120-140 ℃ into the stirring reaction kettle, wherein the steam introduction time is 70-80 min, and obtaining mixed copper;
putting the mixed copper into an electrolytic tank of concentrated sulfuric acid leaching liquid under the condition of reaching the steam-introducing time to obtain a copper sulfate solution, wherein the temperature of the leaching liquid is 40-60 ℃, the pH value of the leaching liquid is 1.8-2.0, and the leaching time is 5-15 min;
when the leaching time is reached, a direct current voltage of 7 to 8 volts is applied to the electrolytic cell, and the current density is 500 to 600A/m2The electrolysis time is 1 to 2 hours;
and (3) keeping the temperature at 40-60 ℃ under the condition of reaching the electrolysis time, adding zinc powder into the electrolytic tank to replace copper ions in the copper sulfate solution, and washing precipitates obtained by filtering the replaced liquid to obtain solid copper powder, wherein the flow rate of washing is 0.1-0.2 cubic meter per second.
Preferably, the step of placing the granular waste impure copper to be refined into a jigger for flotation to obtain waste copper granules comprises the following steps:
carrying out microwave heating on the granular copper scraps to be refined to ensure that the waste plastics in the granular copper scraps to be refined shrink under the action of microwaves;
and placing the granular waste impure copper to be refined after microwave heating into a jigger for flotation, so that heavier waste copper particles are separated from lighter plastic particles, and waste copper particles are obtained.
Preferably, the heating time of the microwave heating is 50 to 60 minutes, and the heating temperature of the microwave heating is 450 to 600 ℃.
Preferably, the method further comprises:
putting the filtered filtrate into an ammonia still, and introducing steam with the temperature of 170-200 ℃ into the ammonia still until the filtrate is boiled so as to precipitate zinc ions in the filtrate in the form of basic zinc carbonate;
and washing the basic zinc carbonate precipitate to obtain the solid zinc salt, wherein the flow rate of the washing is 0.1-0.2 cubic meter per second.
Through the technical scheme, the following technical effects can be at least achieved:
converting gaseous lead into lead dust when meeting oxygen through oxygen in waste gas so as to recover the lead dust, spraying alkali liquor into an exhaust port after the gaseous lead passes through the oxygen so as to react sulfide with the alkali liquor, and removing sulfur in exhaust gas; mixing the copper oxide with a mixture of ammonium hydroxide and ammonium bicarbonate, and performing electrolytic neutralization on the copper and zinc replacement on the electrolyzed copper to obtain high-purity recovered copper. Like this, because on the basis of leading to oxygen and spraying alkali lye to waste gas, lead and sulphide have reduced the pollution to the air in the waste gas to and on the basis of ammonium hydroxide and ammonium bicarbonate mixture, electrolysis operation, replacement operation etc. have improved the recovery copper purity, have improved the reuse rate of copper.
Additional features and advantages of the disclosure will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:
FIG. 1 is a flow diagram illustrating a scrap copper extraction process according to an exemplary embodiment.
Fig. 2 is a flowchart illustrating an implementation of step S101 in fig. 1 according to an exemplary embodiment.
Detailed Description
The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.
Before introducing the scrap copper refining process provided by the present disclosure, an application scenario of various embodiments of the present disclosure is first introduced. Optionally, the method can be used for recycling waste copper in scrap copper wires and can also be used for waste copper in plugboard copper sheets and the like.
The inventors have observed that the plastic protective layer of the waste copper wire is usually corroded, so that the waste copper wire cannot be directly stripped, or a large amount of manpower and material resources are required for stripping, and the recovered waste copper also contains metals such as iron and aluminum, so that the copper recovered by the prior art calcination and the like still contains metals such as iron and aluminum. More importantly, the waste gas after calcination contains harmful gases such as lead and sulfur which seriously pollute the air, harm the health of workers and pollute the environment.
To this end, the present disclosure provides a scrap copper refining process, referring to the flow chart of a scrap copper refining process shown in fig. 1, the method comprising the steps of:
in the step S101, waste copper wires to be refined, which are wrapped in plastic, are crushed into granular waste impure copper to be refined through a crusher, the granular waste impure copper to be refined is placed into a jigger for flotation to obtain waste copper granules, wherein a filter screen with the diameter of a filter hole smaller than or equal to 30mm is installed in the jigger to obtain granular copper with the diameter of the granule smaller than or equal to 30 mm;
in step S102, adding the waste copper particles into a smelting furnace, heating, oxidizing and refining to obtain copper oxide, introducing oxygen into an exhaust port of the smelting furnace to convert gaseous lead into lead dust when meeting the oxygen, so as to recover the lead dust, and spraying alkali liquor into the exhaust port after passing the oxygen to react sulfide with the alkali liquor, so as to remove sulfur in exhaust gas;
in step S103, crushing the copper oxide powder to 40-60 meshes, adding a mixture of ammonium hydroxide and ammonium bicarbonate into a stirring reaction kettle, starting the stirring reaction kettle, and starting stirring timing, wherein the stirring time is 30-40 min;
in step S104, under the condition that the stirring time is up, introducing steam with the temperature of 120-140 ℃ into the stirring reaction kettle, wherein the steam introduction time is 70-80 min, and obtaining mixed copper;
in step S105, under the condition that the steam-through time is reached, putting the mixed copper into an electrolytic tank of a concentrated sulfuric acid leaching solution to obtain a copper sulfate solution, wherein the temperature of the leaching solution is 40 to 60 ℃, the PH value of the leaching solution is 1.8 to 2.0, and the leaching time is 5 to 15 min;
in step S106, when the leaching time is reached, a direct current voltage of 7 to 8 volts is applied to the electrolytic cell, and the current density is 500 to 600A/m2The electrolysis time is 1 to 2 hours;
in step S107, when the electrolysis time period is reached, maintaining the temperature at 40 to 60 ℃, adding zinc powder into the electrolytic cell to replace copper ions in the copper sulfate solution, and washing the precipitate obtained by filtering the replaced liquid with water to obtain solid copper powder, wherein the flow rate of the washing with water is 0.1 to 0.2 cubic meters per second.
According to the technical scheme, gaseous lead is converted into lead dust when meeting oxygen through oxygen in waste gas so as to recover the lead dust, and alkali liquor is sprayed into the exhaust port after the gaseous lead passes through the oxygen so as to enable sulfide to react with the alkali liquor and remove sulfur in exhaust gas; mixing the copper oxide with a mixture of ammonium hydroxide and ammonium bicarbonate, and performing electrolytic neutralization on the copper and zinc replacement on the electrolyzed copper to obtain high-purity recovered copper. Like this, because on the basis of leading to oxygen and spraying alkali lye to waste gas, lead and sulphide have reduced the pollution to the air in the waste gas to and on the basis of ammonium hydroxide and ammonium bicarbonate mixture, electrolysis operation, replacement operation etc. have improved the recovery copper purity, have improved the reuse rate of copper.
Preferably, referring to a flowchart shown in fig. 2 for implementing step S101 in fig. 1, in step S101, the step of placing the granular scrap copper to be refined into a jigger for flotation to obtain the scrap copper granules includes the following steps:
in step S1011, microwave heating is performed on the granular copper scraps to be refined, so that the waste plastics in the granular copper scraps to be refined shrink under the microwave action;
in step S1012, the particulate scrap copper to be refined after microwave heating is placed into a jigger for flotation, so that heavier scrap copper particles are separated from lighter plastic particles, and scrap copper particles are obtained.
Preferably, the heating time of the microwave heating is 50 to 60 minutes, and the heating temperature of the microwave heating is 450 to 600 ℃.
By adopting the technical scheme, the plastic and the metal in the particles can be effectively separated, so that the content of plastic gas in waste gas is reduced, and the pollution of the waste gas generated by the plastic to the air is reduced.
Preferably, the method further comprises:
putting the filtered filtrate into an ammonia still, and introducing steam with the temperature of 170-200 ℃ into the ammonia still until the filtrate is boiled so as to precipitate zinc ions in the filtrate in the form of basic zinc carbonate;
and washing the basic zinc carbonate precipitate to obtain the solid zinc salt, wherein the flow rate of the washing is 0.1-0.2 cubic meter per second.
The first embodiment is as follows:
the waste copper wires to be refined, which are wrapped in the plastic, are crushed into particles by a crusher to be refined.
Carrying out microwave heating on the granular copper scraps to be refined to enable waste plastics in the granular copper scraps to be refined to shrink under the action of microwaves, wherein the heating time of the microwave heating is 50 minutes, and the heating temperature of the microwave heating is 450 ℃;
placing the granular waste impure copper to be refined after microwave heating into a jigger for flotation, separating heavier waste copper particles from lighter plastic particles to obtain waste copper particles, and installing a filter screen with the diameter of a filter hole smaller than or equal to 30mm in the jigger to obtain granular copper with the diameter of the granule smaller than or equal to 30 mm;
adding the waste copper particles into a smelting furnace, heating, oxidizing and refining to obtain copper oxide, introducing oxygen into an exhaust port of the smelting furnace to convert gaseous lead into lead dust when meeting the oxygen so as to recover the lead dust, spraying alkali liquor into the exhaust port after the oxygen so as to react sulfide with the alkali liquor and remove sulfur in exhaust gas;
crushing the copper oxide powder to 40 meshes, adding a mixture of ammonium hydroxide and ammonium bicarbonate into a stirring reaction kettle, starting the stirring reaction kettle, and starting stirring timing, wherein the stirring time is 30 min;
under the condition that the stirring time is 30min, introducing steam at 120 ℃ into the stirring reaction kettle, wherein the steam introduction time is 80min, and obtaining mixed copper;
putting the mixed copper into an electrolytic tank of concentrated sulfuric acid leaching liquid under the condition that the steam-introducing time is 80min to obtain a copper sulfate solution, wherein the temperature of the leaching liquid is 40 ℃, the pH value of the leaching liquid is 1.8, and the leaching time is 5 min;
when the leaching time is up, 7V direct current voltage is connected to the electrolytic cell, and the current density is 600A/m2The electrolysis time is 2 hours;
and keeping the temperature at 40 ℃ under the condition that the electrolysis time is up, adding zinc powder into the electrolytic tank to replace copper ions in the copper sulfate solution, filtering the replaced liquid to obtain a precipitate, and washing the precipitate with water to obtain solid copper powder, wherein the flow rate of washing with water is 0.1-0.2 cubic per second.
Example two:
the waste copper wires to be refined, which are wrapped in the plastic, are crushed into particles by a crusher to be refined.
Carrying out microwave heating on the granular copper scraps to be refined to enable waste plastics in the granular copper scraps to be refined to shrink under the action of microwaves, wherein the heating time of the microwave heating is 60 minutes, and the heating temperature of the microwave heating is 600 ℃;
placing the granular waste impure copper to be refined after microwave heating into a jigger for flotation, separating heavier waste copper particles from lighter plastic particles to obtain waste copper particles, and installing a filter screen with the diameter of a filter hole smaller than or equal to 30mm in the jigger to obtain granular copper with the diameter of the granule smaller than or equal to 30 mm;
adding the waste copper particles into a smelting furnace, heating, oxidizing and refining to obtain copper oxide, introducing oxygen into an exhaust port of the smelting furnace to convert gaseous lead into lead dust when meeting the oxygen so as to recover the lead dust, spraying alkali liquor into the exhaust port after the oxygen so as to react sulfide with the alkali liquor and remove sulfur in exhaust gas;
crushing the copper oxide powder to 60 meshes, adding a mixture of ammonium hydroxide and ammonium bicarbonate into a stirring reaction kettle, starting the stirring reaction kettle, and starting stirring timing, wherein the stirring time is 40 min;
under the condition that the stirring time is up, introducing steam at 140 ℃ into the stirring reaction kettle, wherein the steam introduction time is 70min, and obtaining mixed copper;
putting the mixed copper into an electrolytic tank of concentrated sulfuric acid leaching liquid under the condition of reaching the steam-introducing time to obtain a copper sulfate solution, wherein the temperature of the leaching liquid is 60 ℃, the pH value of the leaching liquid is 2.0, and the leaching time is 15 min;
when the leaching time is up, 8V direct current voltage is connected to the electrolytic cell, and the current density is 500A/m2The electrolysis time is 1 hour;
and keeping the temperature at 60 ℃ under the condition that the electrolysis time is up, adding zinc powder into the electrolytic tank to replace copper ions in the copper sulfate solution, filtering the replaced liquid to obtain a precipitate, and washing the precipitate with water to obtain solid copper powder, wherein the washing flow rate is 0.1-0.2 cubic per second.
Example three:
the waste copper wires to be refined, which are wrapped in the plastic, are crushed into particles by a crusher to be refined.
Carrying out microwave heating on the granular copper scraps to be refined to enable waste plastics in the granular copper scraps to be refined to shrink under the action of microwaves, wherein the heating time of the microwave heating is 50 minutes, and the heating temperature of the microwave heating is 500 ℃;
placing the granular waste impure copper to be refined after microwave heating into a jigger for flotation, separating heavier waste copper particles from lighter plastic particles to obtain waste copper particles, and installing a filter screen with the diameter of a filter hole smaller than or equal to 30mm in the jigger to obtain granular copper with the diameter of the granule smaller than or equal to 30 mm;
adding the waste copper particles into a smelting furnace, heating, oxidizing and refining to obtain copper oxide, introducing oxygen into an exhaust port of the smelting furnace to convert gaseous lead into lead dust when meeting the oxygen so as to recover the lead dust, spraying alkali liquor into the exhaust port after the oxygen so as to react sulfide with the alkali liquor and remove sulfur in exhaust gas;
crushing the copper oxide powder to 55 meshes, adding a mixture of ammonium hydroxide and ammonium bicarbonate into a stirring reaction kettle, starting the stirring reaction kettle, and starting stirring timing, wherein the stirring time is 35 min;
under the condition that the stirring time is up, introducing steam at 140 ℃ into the stirring reaction kettle, wherein the steam introduction time is 75min, and obtaining mixed copper;
putting the mixed copper into an electrolytic tank of concentrated sulfuric acid leaching liquid under the condition of reaching the steam-introducing time to obtain a copper sulfate solution, wherein the temperature of the leaching liquid is 60 ℃, the pH value of the leaching liquid is 1.8, and the leaching time is 5 min;
when the leaching time is reached, a direct current voltage of 7 to 8 volts is applied to the electrolytic cell, and the current density is 530A/m2The electrolysis time is 1.8 hours;
and keeping the temperature at 60 ℃ under the condition that the electrolysis time is up, adding zinc powder into the electrolytic tank to replace copper ions in the copper sulfate solution, filtering the replaced liquid to obtain a precipitate, and washing the precipitate with water to obtain solid copper powder, wherein the washing flow rate is 0.1-0.2 cubic per second.
Example four:
the waste copper wires to be refined, which are wrapped in the plastic, are crushed into particles by a crusher to be refined.
Carrying out microwave heating on the granular copper scraps to be refined to enable waste plastics in the granular copper scraps to be refined to shrink under the action of microwaves, wherein the heating time of the microwave heating is 55 minutes, and the heating temperature of the microwave heating is 600 ℃;
placing the granular waste impure copper to be refined after microwave heating into a jigger for flotation, separating heavier waste copper particles from lighter plastic particles to obtain waste copper particles, and installing a filter screen with the diameter of a filter hole smaller than or equal to 30mm in the jigger to obtain granular copper with the diameter of the granule smaller than or equal to 30 mm;
adding the waste copper particles into a smelting furnace, heating, oxidizing and refining to obtain copper oxide, introducing oxygen into an exhaust port of the smelting furnace to convert gaseous lead into lead dust when meeting the oxygen so as to recover the lead dust, spraying alkali liquor into the exhaust port after the oxygen so as to react sulfide with the alkali liquor and remove sulfur in exhaust gas;
crushing the copper oxide powder to 60 meshes, adding a mixture of ammonium hydroxide and ammonium bicarbonate into a stirring reaction kettle, starting the stirring reaction kettle, and starting stirring timing, wherein the stirring time is 38 min;
under the condition that the stirring time is up, introducing steam at 140 ℃ into the stirring reaction kettle, wherein the steam introduction time is 70min, and obtaining mixed copper;
putting the mixed copper into an electrolytic tank of concentrated sulfuric acid leaching liquid under the condition of reaching the steam-introducing time to obtain a copper sulfate solution, wherein the temperature of the leaching liquid is 55 ℃, the pH value of the leaching liquid is 1.9, and the leaching time is 10 min;
when the leaching time is up, 7 to 8 volts of direct current voltage is connected to the electrolytic cell, and the current density is 600A/m2The electrolysis time is 1.5 hours;
and keeping the temperature at 55 ℃ under the condition that the electrolysis time is up, adding zinc powder into the electrolytic tank to replace copper ions in the copper sulfate solution, filtering the replaced liquid to obtain a precipitate, and washing the precipitate with water to obtain solid copper powder, wherein the washing flow rate is 0.1-0.2 cubic per second.
Moreover, it should be noted that, for convenience and brevity of description, all the embodiments described in the specification belong to the preferred embodiments, and the related parts are not necessarily essential to the present invention, for example, the first parameter determining module and the second parameter determining module may be the same executing module to execute the steps of the method in the specific implementation, and the disclosure is not limited thereto.
The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.
It should be noted that, in the foregoing embodiments, various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various combinations that are possible in the present disclosure are not described again.
In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.

Claims (4)

1. A scrap copper refining process is characterized by comprising the following steps:
crushing waste copper wires to be refined, which are wrapped in plastics, into granular waste impure copper to be refined through a crusher, and putting the granular waste impure copper to be refined into a jigger for flotation to obtain waste copper granules, wherein a filter screen with the diameter of a filter hole smaller than or equal to 30mm is installed in the jigger to obtain granular copper with the diameter of the granule smaller than or equal to 30 mm;
adding the waste copper particles into a smelting furnace, heating, oxidizing and refining to obtain copper oxide, introducing oxygen into an exhaust port of the smelting furnace to convert gaseous lead into lead dust when meeting the oxygen so as to recover the lead dust, spraying alkali liquor into the exhaust port after the oxygen so as to react sulfide with the alkali liquor and remove sulfur in exhaust gas;
crushing the copper oxide powder to 40-60 meshes, adding a mixture of ammonium hydroxide and ammonium bicarbonate into a stirring reaction kettle, starting the stirring reaction kettle, and starting stirring timing, wherein the stirring time is 30-40 min;
under the condition that the stirring time is up, introducing steam at 120-140 ℃ into the stirring reaction kettle, wherein the steam introduction time is 70-80 min, and obtaining mixed copper;
putting the mixed copper into an electrolytic tank of concentrated sulfuric acid leaching liquid under the condition of reaching the steam-introducing time to obtain a copper sulfate solution, wherein the temperature of the leaching liquid is 40-60 ℃, the pH value of the leaching liquid is 1.8-2.0, and the leaching time is 5-15 min;
when the leaching time is reached, a direct current voltage of 7 to 8 volts is applied to the electrolytic cell, and the current density is 500 to 600A/m2The electrolysis time is 1 to 2 hours;
and (3) keeping the temperature at 40-60 ℃ under the condition of reaching the electrolysis time, adding zinc powder into the electrolytic tank to replace copper ions in the copper sulfate solution, and washing precipitates obtained by filtering the replaced liquid to obtain solid copper powder, wherein the flow rate of washing is 0.1-0.2 cubic meter per second.
2. The method as claimed in claim 1, wherein the step of putting the granular scrap copper to be refined into a jigger for flotation to obtain the scrap copper granules comprises the following steps:
carrying out microwave heating on the granular copper scraps to be refined to ensure that the waste plastics in the granular copper scraps to be refined shrink under the action of microwaves;
and placing the granular waste impure copper to be refined after microwave heating into a jigger for flotation, so that heavier waste copper particles are separated from lighter plastic particles, and waste copper particles are obtained.
3. The method of claim 2, wherein the microwave heating is performed for a heating time period of 50 to 60 minutes and the heating temperature of the microwave heating is 450 to 600 degrees celsius.
4. The method according to any one of claims 1-3, further comprising:
putting the filtered filtrate into an ammonia still, and introducing steam with the temperature of 170-200 ℃ into the ammonia still until the filtrate is boiled so as to precipitate zinc ions in the filtrate in the form of basic zinc carbonate;
and washing the basic zinc carbonate precipitate to obtain the solid zinc salt, wherein the flow rate of the washing is 0.1-0.2 cubic meter per second.
CN202110012001.8A 2021-04-30 2021-04-30 Scrap copper refining process Pending CN113005291A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110012001.8A CN113005291A (en) 2021-04-30 2021-04-30 Scrap copper refining process

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110012001.8A CN113005291A (en) 2021-04-30 2021-04-30 Scrap copper refining process

Publications (1)

Publication Number Publication Date
CN113005291A true CN113005291A (en) 2021-06-22

Family

ID=76384160

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110012001.8A Pending CN113005291A (en) 2021-04-30 2021-04-30 Scrap copper refining process

Country Status (1)

Country Link
CN (1) CN113005291A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114085998A (en) * 2021-11-17 2022-02-25 江苏荣麒循环科技有限公司 Scrap copper refining equipment for recycling mobile phone chip and refining method thereof

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102534656A (en) * 2012-02-10 2012-07-04 嘉兴科菲冶金科技股份有限公司 Process for recycling copper through electrodeposition by treating scrap copper materials by adopting cyclone electrolysis technology
CN104313334A (en) * 2014-11-14 2015-01-28 宁波杭桥铜业有限公司 Waste copper pretreating and refining technology
CN106282587A (en) * 2016-08-18 2017-01-04 紫金矿业集团股份有限公司 A kind of recovery copper and method of cadmium from copper-cadmium slag
CN108165751A (en) * 2017-12-29 2018-06-15 中国葛洲坝集团绿园科技有限公司 The method and system of recycling valuable metal are smelted in a kind of collaboration from waste printed circuit board, copper scap and copper-containing residue

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102534656A (en) * 2012-02-10 2012-07-04 嘉兴科菲冶金科技股份有限公司 Process for recycling copper through electrodeposition by treating scrap copper materials by adopting cyclone electrolysis technology
CN104313334A (en) * 2014-11-14 2015-01-28 宁波杭桥铜业有限公司 Waste copper pretreating and refining technology
CN106282587A (en) * 2016-08-18 2017-01-04 紫金矿业集团股份有限公司 A kind of recovery copper and method of cadmium from copper-cadmium slag
CN108165751A (en) * 2017-12-29 2018-06-15 中国葛洲坝集团绿园科技有限公司 The method and system of recycling valuable metal are smelted in a kind of collaboration from waste printed circuit board, copper scap and copper-containing residue

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114085998A (en) * 2021-11-17 2022-02-25 江苏荣麒循环科技有限公司 Scrap copper refining equipment for recycling mobile phone chip and refining method thereof
CN114085998B (en) * 2021-11-17 2023-02-28 江苏荣麒循环科技有限公司 Scrap copper refining equipment for recycling mobile phone chip and refining method thereof

Similar Documents

Publication Publication Date Title
US9257731B2 (en) Method for implementing full cycle regeneration of waste lead acid batteries
CN108559846B (en) Method for comprehensively recovering anode material of waste lithium ion battery
CN110835682B (en) Method for cooperatively treating positive and negative active materials of waste lithium ion battery
CN102851707B (en) The technique of a kind of alkaline leaching remanufacture electrolytic zinc powder and lead powder from smelting ash
CN110482511B (en) Method for recovering anode material of waste lithium iron phosphate battery
CN106077040B (en) A kind of method of ultrasonic wave auxiliary alkali leaching process aluminum electrolytic waste and old cathode carbon block
CN110284157B (en) Method for recycling anode carbon slag and aluminum electrolyte
CA2992019A1 (en) A method of recovering metals from spent li-ion batteries
WO2017145099A1 (en) Process for recovery of pure cobalt oxide from spent lithium ion batteries with high manganese content
CN107017444A (en) A kind of method of metal recovery in waste lithium iron phosphate battery
CN103911514B (en) The recovery and treatment method of scrap hard alloy grinding material
CN111154980B (en) Neodymium iron boron waste solution electrolytic regeneration method
CN109256599A (en) A kind of processing method for nickel-cobalt-manganese ternary waste lithium cell
CN104409792A (en) Waste lithium battery resource recycling method and application of product
CN101831542A (en) Method for extracting metallic elements of ferrum, magnesium and calcium from molybdenum milltailings
CN103949459A (en) Method for producing electrolyte for aluminium and recovering carbon through recycle of aluminum electrolysis carbon residue
CN113005291A (en) Scrap copper refining process
CN107400781B (en) A kind of recovery method of lead smelting waste material containing zinc
CN100586617C (en) Method for recycling and preparing ultra-fine zinc dust from zinc dust containing material
CN104419826B (en) The method that ammonia soaks Zinc Oxide electrowinning zinc
CN107583646A (en) It is a kind of from useless SCR catalyst Green reclaiming Fe2O3/TiO2The method of photochemical catalyst
CN107574308B (en) A kind of method of Manganese anode slime manganese lead separation
CN110735039A (en) Electrolytic manganese metal anode mud treatment method
CN108330276A (en) Method for preparing high-purity iron powder using iron vitriol slag and products thereof and application
CN106676275B (en) Extraction vanadium method based on discarded slag and acidic and alkaline wastewater

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication
RJ01 Rejection of invention patent application after publication

Application publication date: 20210622