CN219342235U

CN219342235U - System for recycling lead from scrap copper electrolysis anode slime

Info

Publication number: CN219342235U
Application number: CN202223368754.1U
Authority: CN
Inventors: 韩志彪; 丁银贵; 刘梦瑶; 陈士朝; 游韶伟; 管子豪
Original assignee: CECEP Engineering Technology Research Institute Co Ltd
Current assignee: CECEP Engineering Technology Research Institute Co Ltd
Priority date: 2022-12-15
Filing date: 2022-12-15
Publication date: 2023-07-14
Anticipated expiration: 2032-12-15

Abstract

The utility model belongs to the field of circuit board waste treatment, and particularly relates to a system for recycling lead from scrap copper electrolysis anode slime, which comprises a decoppering kettle provided with a sulfuric acid inlet and an anode slime inlet, wherein a discharge port of the decoppering kettle is connected with a first solid-liquid separation device, a filter residue outlet of the decoppering kettle is connected with an inlet of a lead dissolving kettle, an ammonium acetate solution inlet is arranged on the lead dissolving kettle, an outlet of the lead dissolving kettle is connected with a second solid-liquid separation device, a filtrate outlet of the lead dissolving kettle is connected with an inlet of a lead depositing kettle, an ammonia sulfide inlet is arranged on the lead depositing kettle, a discharge port of the lead depositing kettle is connected with a third solid-liquid separation device, a filtrate outlet of the lead depositing kettle is connected with an inlet of a crystallization separator, and a discharge port of the crystallization separator is connected with a fourth solid-liquid separation device, and a filtrate outlet of the fourth solid-liquid separation device is connected with the ammonium acetate solution inlet. The system disclosed by the application can remove and recycle the lead sulfate in the anode mud and produce two products of lead sulfide and ammonium sulfate.

Description

System for recycling lead from scrap copper electrolysis anode slime

Technical Field

The utility model belongs to the field of circuit board waste treatment, and particularly relates to a system for recycling lead from scrap copper electrolysis anode slime.

Background

Along with the continuous increase of the total amount of the global electronic products, the total amount of the electronic waste is greatly increased. According to the '2020 Global electronic waste detection report', 4440 ten thousand tons of electronic waste are produced in the world in 2014, 5360 ten thousand tons of electronic waste are produced in the world in 2019, and 920 ten thousand tons of electronic waste are increased compared with 2014. According to the current growth rate, the total amount of global electronic waste is expected to reach 7470 ten thousand tons by 2030.

The waste circuit board is a component part with highest value and highest treatment difficulty in electronic waste, and consists of 30% of inorganic oxide (silicate), 30% of organic matters (various resins) and 40% of metals (copper, lead, tin, gold and silver and the like). The prior fire-wet comprehensive treatment process characterized by high-temperature bath smelting and electrolytic refining not only can directly treat broken electronic waste and fully utilize chemical energy of organic polymer materials, but also can use glass fiber and other components as smelting flux. The copper alloy produced by the pyrometallurgy is called scrap copper, the scrap copper is processed into an anode plate and then subjected to electrolytic refining, a cathode copper product and anode mud can be obtained, and the anode mud is subjected to a series of treatment, so that precious metal components such as gold, silver, platinum, palladium and the like in the anode mud can be efficiently recovered.

Because the waste circuit board has complex components, especially the lead and tin content of the welding spot part is higher, the anode mud produced by the copper anode plate in the electrolytic refining process also contains higher lead. These are mainly present in the form of lead sulphate, which, because of its dissolution under conditions of strong acid and high chloride ion concentration, can have an adverse effect on the chloridizing leaching-reduction gold extraction.

Disclosure of Invention

The utility model aims to provide a system for recycling lead from scrap copper electrolysis anode slime, which aims to solve the problem that the scrap copper electrolysis anode slime is difficult to extract gold through chloridizing leaching-reduction in the prior art.

In order to solve the problems, the utility model provides a system for recovering lead from copper scrap electrolysis anode slime, which comprises: the device comprises a decoppering kettle, a first solid-liquid separation device, a lead dissolving kettle, a second solid-liquid separation device, a lead depositing kettle, a third solid-liquid separation device, a crystallization separator and a fourth solid-liquid separation device, wherein the decoppering kettle is provided with a sulfuric acid inlet and an anode mud inlet, a discharge port of the decoppering kettle is connected with the inlet of the first solid-liquid separation device, a filter residue outlet of the first solid-liquid separation device is connected with an inlet of the lead dissolving kettle, an ammonium acetate solution inlet is arranged on the lead dissolving kettle, an outlet of the lead dissolving kettle is connected with an inlet of the second solid-liquid separation device, a filtrate outlet of the second solid-liquid separation device is connected with an inlet of the lead depositing kettle, a filtrate outlet of the lead depositing kettle is connected with an inlet of the third solid-liquid separation device, a filtrate outlet of the third solid-liquid separation device is connected with an inlet of the crystallization separator, and a discharge port of the crystallization separator is connected with an inlet of the fourth solid-liquid separation device, and a filtrate outlet of the fourth solid-liquid separation device is connected with the ammonium acetate solution inlet.

Preferably, the first solid-liquid separation device, the second solid-liquid separation device, the third solid-liquid separation device and the fourth solid-liquid separation device are filter presses, centrifugal filters or gravity settling machines.

As a preferable scheme, the decoppering kettle is also provided with a compressed air inlet;

as a preferable scheme, the decoppering kettle is also provided with a heating and stirring device;

as a preferable scheme, a filtrate outlet of the first solid-liquid separation device is connected to a copper electrowinning recovery unit to continuously recover copper;

preferably, the filter residue outlet of the second solid-liquid separation device is connected to the noble metal recovery unit.

Preferably, the filter residue outlet of the third solid-liquid separation device is connected with a lead sulfide receiving unit.

Preferably, the filter residue outlet of the fourth solid-liquid separation device is connected with an ammonium sulfate crystallization receiving unit.

Compared with the prior art, the utility model has the following characteristics:

the device can remove and recycle lead sulfate in anode mud through sulfuric acid by a decoppering kettle and a first solid-liquid separation device before chloridizing and extracting gold, silver, platinum and palladium, lead in filter residues is removed by ammonium acetate by a lead dissolving kettle and a second solid-liquid separation device, so that the interference of lead on the subsequent noble metal extraction and the adverse effect on the product quality are effectively avoided, lead in filtrate is removed by ammonia sulfide by a lead precipitation kettle and a third solid-liquid separation device, the lead is recycled as lead sulfide, and ammonium sulfate crystals and ammonium acetate solution are obtained by a crystallization separator and a fourth solid-liquid separation device. The device of the utility model can not produce smoke and wastewater discharge, and is energy-saving and environment-friendly.

Drawings

In order to more clearly illustrate embodiments of the present utility model or the prior art, the drawings that are required for the description of the embodiments or the prior art will be briefly described, and it is apparent that the drawings in the description below are some embodiments of the present utility model.

Fig. 1 is a schematic diagram of a system for recovering lead from the copper scrap electrolytic anode slime in embodiment 1 of the present utility model.

The method comprises the following steps: 1 decoppering kettle, 2 first filter press, 3 lead dissolving kettle, 4 second filter press, 5 lead depositing kettle, 6 third filter press, 7 crystallization separator, 8 fourth filter press.

Detailed Description

The following examples are illustrative of the utility model and are not intended to limit the scope of the utility model. The specific techniques or conditions are not identified in the examples and are described in the literature in this field or are carried out in accordance with the product specifications.

In the description of the present utility model, unless otherwise indicated, the terms "upper," "lower," and the like refer to an orientation or state relationship based on that shown in the drawings, for convenience of description and simplicity of description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the utility model.

In the following examples, the equipment and the like used were conventional products available for purchase by a regular channel manufacturer, without specifying the manufacturer. The methods are conventional methods unless otherwise specified, and the starting materials are commercially available from the public sources unless otherwise specified.

Example 1

As shown in fig. 1, the present embodiment provides a system for recovering lead from a copper scrap electrolytic anode slime, which includes:

the device comprises a decoppering kettle 1, a first filter press 2, a lead dissolving kettle 3, a second filter press 4, a lead depositing kettle 5, a third filter press 6, a crystallization separator 7 and a fourth filter press 8, wherein the decoppering kettle 1 is provided with a sulfuric acid inlet, an anode mud inlet and a compressed air inlet; the copper removing kettle 1 is also provided with a heating and stirring device, in the embodiment, a stirrer and steam are adopted, a discharge hole of the copper removing kettle 1 is connected with an inlet of a first filter press 2, and a filtrate outlet of the first filter press 2 is connected to a copper electrowinning recovery unit so as to continuously recover copper; the filter residue outlet of the first filter press 2 is connected with the inlet of a lead dissolution kettle 3, an ammonium acetate solution inlet is arranged on the lead dissolution kettle 3, the outlet of the lead dissolution kettle 3 is connected with the inlet of a second filter press 4, and the filter residue outlet of the second filter press 4 is connected to a noble metal recovery unit; the filtrate outlet of the second filter press 4 is connected with the inlet of a lead precipitation kettle 5, an ammonia sulfide inlet is arranged on the lead precipitation kettle 5, the discharge port of the lead precipitation kettle 5 is connected with the inlet of a third filter press 6, and the filter residue outlet of the third filter press 6 is connected with a lead sulfide receiving unit; the filtrate outlet of the third filter press 6 is connected with the inlet of the crystallization separator 7, the discharge port of the crystallization separator 7 is connected with the inlet of the fourth filter press 8, the ammonium sulfate crystals are obtained from the filter residue outlet of the fourth filter press 8, and the filtrate outlet of the fourth filter press 8 is connected with the ammonium acetate solution inlet.

The system for recycling lead from the copper scrap electrolysis anode slime adopts the following process:

(1) Sulfuric acid leaching

Adding the scrap copper anode slime and dilute sulfuric acid into a decoppering kettle, heating, stirring and leaching, and introducing air in the leaching process to convert the residual metallic copper in the anode slime into soluble CuSO ₄ And then filtering for the first time to obtain filtrate I and filter residue I, wherein the main component of the filtrate I is copper sulfate solution, and discharging the filtrate I out of the system. And leaching the filter residue by adopting ammonium acetate solution to remove lead.

(2) Leaching and lead removing by ammonium acetate solution

1) Adding ammonium acetate solution with proper concentration into the first filter residue to make lead sulfate therein become soluble lead acetate to enter the solution, and then filtering for the second time to obtain a second filter liquor and a second filter residue. And the filtrate II is sent to a sulfuration lead precipitation process. And taking the filter residue II as a raw material for extracting rare noble metals, and discharging the filter residue II out of the system.

2) Adding ammonia sulfide into the filtrate II to lead Pb therein ²⁺ Fully precipitated in the form of lead sulfide. And (3) filtering for the third time after the lead precipitation is completed to obtain filtrate III and filter residue III. The main component of the filter residue is lead sulfide, and the filter residue is discharged out of the system. The main components of the filtrate III are ammonium acetate and ammonium sulfate, ammonium sulfate is crystallized and separated out by adopting a cooling crystallization method, and then the filtrate IV and the ammonium sulfate are filtered to obtain the ammonium acetate filtrate IV and the ammonium sulfate crystal, so that the separation of the ammonium acetate and the ammonium sulfate is realized, the filtrate IV returns to the leaching and lead removing step, and the ammonium sulfate crystal is discharged out of the system.

The technical solutions of the present application are clearly and completely described through the above embodiments, and it is obvious that the described embodiments are only some embodiments of the present patent, but not all embodiments. The specific structure and features of the present utility model that are known in the art are not described in detail herein. It should be noted that it is possible for those skilled in the art to make several variations and modifications without departing from the concept of the present utility model, such as simply replacing the filter press with a centrifugal filter or a gravity settler, simply replacing the decoppering tank, the lead dissolving tank or the lead precipitating tank with other chemical reaction vessels, which should also be regarded as the scope of protection of the present utility model, without affecting the effect of the implementation of the present utility model and the practicality of the patent. The protection scope of the present application shall be subject to the content of the claims, and the description of the specific embodiments and the like in the specification can be used for explaining the content of the claims.

Claims

1. A system for recycling lead from scrap copper electrolysis anode slime is characterized in that: the device comprises a decoppering kettle, a first solid-liquid separation device, a lead dissolving kettle, a second solid-liquid separation device, a lead depositing kettle, a third solid-liquid separation device, a crystallization separator and a fourth solid-liquid separation device, wherein the decoppering kettle is provided with a sulfuric acid inlet and an anode mud inlet, a discharge port of the decoppering kettle is connected with the inlet of the first solid-liquid separation device, a filter residue outlet of the first solid-liquid separation device is connected with an inlet of the lead dissolving kettle, an ammonium acetate solution inlet is arranged on the lead dissolving kettle, an outlet of the lead dissolving kettle is connected with an inlet of the second solid-liquid separation device, a filtrate outlet of the second solid-liquid separation device is connected with an inlet of the lead depositing kettle, a filtrate outlet of the lead depositing kettle is connected with an inlet of the third solid-liquid separation device, a filtrate outlet of the third solid-liquid separation device is connected with an inlet of the crystallization separator, a discharge port of the crystallization separator is connected with an inlet of the fourth solid-liquid separation device, and a filtrate outlet of the fourth solid-liquid separation device is connected with the ammonium acetate solution inlet.

2. The system for recovering lead from the copper scrap electrolytic anode slime according to claim 1, wherein: and a heating and stirring device is also arranged on the decoppering kettle.

3. The system for recovering lead from the copper scrap electrolytic anode slime according to claim 1, wherein: and a compressed air inlet is also arranged on the decoppering kettle.

4. The system for recovering lead from the copper scrap electrolytic anode slime according to claim 1, wherein: and a filtrate outlet of the first solid-liquid separation device is connected with a copper electrodeposition recovery unit.

5. The system for recovering lead from the copper scrap electrolytic anode slime according to claim 1, wherein: and a filter residue outlet of the second solid-liquid separation device is connected with a noble metal recovery unit.

6. The system for recovering lead from the copper scrap electrolytic anode slime according to claim 1, wherein: and a filter residue outlet of the third solid-liquid separation device is connected with a lead sulfide receiving unit.

7. The system for recovering lead from the copper scrap electrolytic anode slime according to claim 1, wherein: and a filter residue outlet of the fourth solid-liquid separation device is connected with an ammonium sulfate crystallization receiving unit.

8. The system for recovering lead from the copper scrap electrolytic anode slime according to claim 1, wherein: the first solid-liquid separation device, the second solid-liquid separation device, the third solid-liquid separation device and the fourth solid-liquid separation device are filter presses, centrifugal filters or gravity settling machines.