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Method for recycling silver (Ag) from waste mobile phone electronic components

A technology of electronic components and electronic components, applied in the direction of improving process efficiency, etc., can solve the problems of high-hazard acid recovery of silver, high pollution, etc., achieve significant environmental and social benefits, less consumption, high leaching rate Effect

Inactive Publication Date: 2016-10-12
SOUTH CHINA UNIV OF TECH
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Problems solved by technology

[0014] The purpose of the present invention is to provide a method for recovering silver from waste mobile phone electronic components, to solve the problem of high pollution and high hazard acid recovery of silver in waste mobile phone electronic components at the present stage, which can realize the recovery of precious metals in waste mobile phone electronic components Clean and efficient recovery of silver and many other valuable components

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  • Method for recycling silver (Ag) from waste mobile phone electronic components

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Embodiment

[0035] A method for recovering silver (Ag) from waste mobile phone electronic components, the method for recovering silver (Ag) is divided into pretreatment, Na 2 S 2 o 3 -CuSO 4 -NH 4 OH-Na 3 C 6 h 5 o 7 The three parts of silver immersion system and hydrazine hydrate reduction silver include the following steps:

[0036] (1) Randomly select 1,000 waste mobile phones, remove the circuit board after manual disassembly, use a heat gun to blow off the mobile phone components on the circuit board, weigh 300g sub-components, and use a hammer crusher and a disc crusher to crush Waste mobile phone electronic components are broken into powder;

[0037] (2) Physically sort the electronic component powder obtained in step (1) to obtain Ag-containing metal powder and epoxy resin powder respectively, so as to realize non-metallic materials mainly containing epoxy resin and metal materials containing Ag The separation of the metal material is then ground to more than 100 mesh to ...

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Abstract

The invention discloses a method for recycling silver (Ag) from waste mobile phone electronic components. The method includes the steps that firstly, the waste mobile phone electronic components are smashed through a mechanical crushing method; secondly, powder of the crushed electronic components is screened and separated, and metal-silver-containing powder with the particle size ranging from 100 mesh to 200 mesh is obtained; thirdly, the metal-silver-containing powder enters a reactor with a mechanical stirring function to react with a Na2S2O3-CuSO4-NH4OH-Na3C6H5O7 immersion silver system, and a silver-containing solution is acquired; and fourthly, an immersion silver solution is reduced through hydrazine hydrate so that rough silver powder can be acquired. The method has the beneficial effects of being efficient, environment-friendly, high in process adaptability, high in resource comprehensive utilizing rate, wide in application prospect and the like, the problem that pollution is serious when the waste mobile phone electronic components are recycled through strong acid can be solved, and remarkable economic, environmental and social benefits are achieved.

Description

technical field [0001] The invention belongs to the technical field of comprehensive utilization of secondary resources, and in particular relates to an efficient and environmentally friendly silver recovery method for waste mobile phone electronic components. Background technique [0002] In recent years, with the improvement and development of science and technology, the update of electronic products (mobile phones, computers, etc.) has been continuously accelerated, which also indicates that the speed of electronic products being eliminated is becoming increasingly serious. As the most widely used electronic product, mobile phones cannot be ignored. According to statistics from the Ministry of Industry and Information Technology, the number of mobile phone users in China has reached 1.235 billion, making China the world's largest mobile phone user country. Domestic consumers replace a new mobile phone every 15 months on average. At present, about 100 million waste mobil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B11/00
CPCC22B7/008C22B11/046Y02P10/20
Inventor 张小平朱亚茹丁江铃
Owner SOUTH CHINA UNIV OF TECH
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