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Method for recovering micro-nano copper powder from waste printed circuit board

A technology of printed circuit board and nano copper powder is applied in the field of electronic waste recycling, which can solve the problems of low copper recovery efficiency and complex production process, and achieve the effects of pollution-free, low environmental pollution and wide applicability.

Pending Publication Date: 2022-04-12
扬州伟尔富环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] In order to solve the above technical problems, the present invention provides a method for recovering micro-nano copper powder from waste printed circuit boards, to solve the problem that the existing method for recovering copper powder from waste printed circuit boards has a relatively complicated production process, physical extraction and chemical The failure of effective combination of extraction leads to the problem of low recovery efficiency of copper

Method used

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  • Method for recovering micro-nano copper powder from waste printed circuit board
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  • Method for recovering micro-nano copper powder from waste printed circuit board

Examples

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Embodiment 1

[0071] The invention discloses a method for recovering micronano copper powder from waste printed circuit boards. The specific steps are as follows:

[0072] Step 1: Crushing of waste printed circuit boards; coarsely crushing the waste printed circuit boards with a crusher into pieces smaller than 15cm×15cm, and then crushing them with a strong plastic crusher and a sealed sample preparation grinder to obtain Waste printed circuit board pulverized material, the particle size of the waste printed circuit board pulverized material is ≤30 mesh;

[0073] Step 2: Grinding of waste printed circuit boards; the small pieces of material obtained by the preliminary shearing in step 1 are sent to the cutting grinder, and in the cutting grinder, the blades rotating at high speed further crush the small pieces of material to obtain a particle size smaller than 10mm fine-grained material;

[0074] Step 3: mixing and stirring the slurry; sending the fine-grained material in step 2 and an ap...

Embodiment 2

[0083] The invention discloses a method for recovering micronano copper powder from waste printed circuit boards. The specific steps are as follows:

[0084] Step 1: Crushing of waste printed circuit boards; coarsely crushing the waste printed circuit boards with a crusher into pieces smaller than 15cm×15cm, and then crushing them with a strong plastic crusher and a sealed sample preparation grinder to obtain Waste printed circuit board pulverized material, the particle size of the waste printed circuit board pulverized material is ≤30 mesh;

[0085] Step 2: Grinding of waste printed circuit boards; the small pieces of material obtained by the preliminary shearing in step 1 are sent to the cutting grinder, and in the cutting grinder, the blades rotating at high speed further crush the small pieces of material to obtain a particle size smaller than 10mm fine-grained material;

[0086] Step 3: mixing and stirring the slurry; sending the fine-grained material in step 2 and an ap...

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Abstract

The invention provides a method for recovering micro-nano copper powder from a waste printed circuit board. The method specifically comprises the following steps: crushing the waste printed circuit board; grinding the waste printed circuit board; mixing and stirring the slurry; screening by utilizing gravity; carrying out magnetic separation on heavy products; carrying out oxidation reaction on the copper-rich collective; separating and drying the copper leaching solution; electrolyzing the copper metal mixture; carrying out passivating treatment on the copper powder; and collecting the nano copper powder. According to the process, a mechanical and chemical separation method is adopted, resource recycling is carried out by utilizing the density difference of materials, and secondary pollution generated by a chemical method is avoided; a shaking table sorting method is adopted, dust can be prevented from being generated, water for sorting can be recycled, and the whole sorting process is free of pollution; the shaking table sorting can realize recycling of micro-fine particle materials, has the advantages of wide sorting grade, small environmental pollution and the like, and has wide applicability.

Description

technical field [0001] The invention belongs to the technical field of recycling electronic waste, and in particular relates to a method for recovering micronano copper powder from waste printed circuit boards. Background technique [0002] In recent years, with the development and progress of society, the amount of electronic waste is increasing at an alarming rate. Waste Printed Circuit Boards (WPCBs), mainly composed of resin, glass fiber, kraft paper, and high-purity copper foil, have dual attributes of hazards and resources. It not only contains a large amount of toxic and harmful chemical substances, such as toxic metals such as Pb, Hg, Cr, and organic substances such as brominated flame retardants; it also contains valuable metals such as Cu, Fe, Al, and rare and precious metals such as Ag, Au, and Pd. Great resource recovery value. Its copper content is relatively high, which can be 20-40 times that of copper ore. [0003] As an important part of electronic produc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B1/00C22B15/00B22F1/145C25C5/02C25C1/12
CPCY02P10/20
Inventor 陈伟平田野
Owner 扬州伟尔富环保科技有限公司
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