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Process for processing waste circuit boards to prepare copper alloy powder by mechanical physical method

A technology of waste circuit boards and copper alloys, which is applied in the field of electronic waste resource recycling, can solve the problems of large environmental pollution, high energy consumption, and long metallurgical recycling process, and achieve the goal of short process, low energy consumption, and realization of recycling Effect

Active Publication Date: 2019-11-12
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to provide a mechanical physical method that avoids short metallurgical process, low energy consumption and less pollution, aiming at the shortcomings of the existing metallurgical recovery process of waste circuit boards, such as long process flow, high energy consumption, and large environmental pollution. Recycling process to realize the regeneration and direct material utilization of metals in waste circuit boards

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  • Process for processing waste circuit boards to prepare copper alloy powder by mechanical physical method

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Embodiment 1

[0031] This embodiment provides a process for preparing copper alloy powder from waste circuit boards by mechanical physical method, including the following steps:

[0032] (1) 100 kg of waste circuit boards were crushed to less than 5 mm, and metals and nonmetals were initially separated by airflow separation to obtain iron-containing metal-enriched bodies, in which the iron content was 16.9 wt.%.

[0033] (2) performing magnetic separation on the ferrous metal-enriched body obtained in step (1) to obtain non-ferrous metal-enriched body and ferromagnetic metal-enriched body respectively;

[0034] (3) Using a hammer crusher to further crush the non-ferrous metal-enriched body obtained in step (2) to less than 0.5 mm, and sieve with a sieve to obtain coarse particle materials larger than 200 mesh;

[0035] (4) Sorting the coarse-grained material larger than 200 meshes obtained in step (3) with a hydraulic shaker to remove most of the non-metals and increase the metal content in...

Embodiment 2

[0040] This embodiment provides a process for preparing copper alloy powder from waste circuit boards by mechanical physical method, including the following steps:

[0041] (1) 100 kg of waste circuit boards were crushed to less than 5 mm, and metals and nonmetals were initially separated by airflow separation to obtain iron-containing metal-enriched bodies, in which the iron content was 16.9 wt.%.

[0042] (2) performing magnetic separation on the ferrous metal-enriched body obtained in step (1) to obtain non-ferrous metal-enriched body and ferromagnetic metal-enriched body respectively;

[0043] (3) Using a hammer crusher to further crush the non-ferrous metal-enriched body obtained in step (2) to less than 0.5 mm, and sieve with a sieve to obtain coarse particle materials larger than 200 mesh;

[0044] (4) Sorting the coarse-grained material larger than 200 meshes obtained in step (3) with a hydraulic shaker to remove most of the non-metals and increase the metal content in...

Embodiment 3

[0049] This embodiment provides a process for preparing copper alloy powder from waste circuit boards by mechanical physical method, including the following steps:

[0050] (1) 100 kg of waste circuit boards were crushed to less than 5 mm, and metals and nonmetals were initially separated by airflow separation to obtain iron-containing metal-enriched bodies, in which the iron content was 16.9 wt.%.

[0051] (2) performing magnetic separation on the ferrous metal-enriched body obtained in step (1) to obtain non-ferrous metal-enriched body and ferromagnetic metal-enriched body respectively;

[0052] (3) Using a hammer crusher to further crush the non-ferrous metal-enriched body obtained in step (2) to less than 0.5 mm, and sieve with a sieve to obtain coarse particle materials larger than 200 mesh;

[0053] (4) Sorting the coarse-grained material larger than 200 meshes obtained in step (3) with a hydraulic shaker to remove most of the non-metals and increase the metal content in...

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Abstract

The invention discloses a process for processing waste circuit boards to prepare copper alloy powder by a mechanical physical method. The process comprises the steps of waste circuit board crushing pretreatment, airflow separation, magnetic separation iron removal, mechanical pulverization, screening, shaking table sorting, ball-milling impurity removing, ball-milling refining, powder purificationtreatment and other procedures, and the copper alloy powder is finally obtained. The process has the following advantages that the obtained copper alloy powder mainly contains Cu, Sn, Pb and Fe, theingredient and content of the obtained copper alloy powder is within the range required by a copper base friction material, the obtained copper alloy powder can be directly applied to prepare the copper base friction material, a small amount of tailings generated in the whole process is easy to process, and full recovery of metal can be realized; and compared with other methods capable of realizing cyclic regeneration of valuable metals in the waste circuit boards, the process adopts the mechanical physical method without a metallurgical process, direct materialization of waste metallic coppercan be realized, and the process is simple, low in production cost and energy consumption and less in pollution.

Description

technical field [0001] The invention relates to the technical field of resource recycling of electronic waste, in particular to a process for preparing copper alloy powder by treating waste circuit boards with mechanical and physical methods. Background technique [0002] With the rapid development of the electronic information industry, the performance requirements of electronic products are constantly improving. Circuit boards are the core components of electronic products. Because of the replacement of electronic products and the leftovers generated in the production of circuit boards, there will be a large amount of waste every year. Circuit boards are produced, and while these electronic wastes occupy social resources, they also cause great harm to the surrounding ecological environment. [0003] The composition of the circuit board is complex and can be simply divided into two parts: metal and non-metal. The content in different circuit boards is different, mostly bet...

Claims

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Application Information

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IPC IPC(8): B09B3/00B03B9/00C22B7/00C22B15/00
CPCB09B3/00B03B9/00C22B7/005C22B15/00Y02P10/20Y02W30/82
Inventor 陈维平王发展刘方方朱德智康志新
Owner SOUTH CHINA UNIV OF TECH
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