Recovery device and recovery method of metallic copper of waste printed circuit board

A printed circuit board and metal copper technology, which is applied to the recovery device and recycling field of metal copper in waste printed circuit boards, can solve problems such as equipment corrosion and high energy consumption in the electrolysis process, and achieve low energy recovery, reduce emissions, and reduce costs Effect

Inactive Publication Date: 2013-11-20
INNER MONGOLIA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0019] The disadvantage of the traditional method of electrolytic recovery of copper is that the electrolysis process consumes a lot of energy, and the acid produced seriously corrodes the equipment

Method used

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  • Recovery device and recovery method of metallic copper of waste printed circuit board
  • Recovery device and recovery method of metallic copper of waste printed circuit board
  • Recovery device and recovery method of metallic copper of waste printed circuit board

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Embodiment 1

[0069] The process flow of the present invention includes: preparation of metal copper recovery device in waste printed circuit boards, enrichment of electrochemically active microorganisms at the anode of microbial batteries, oxidant Fe 3+ Generation, conversion of metallic copper in waste printed circuit boards to Cu 2+ and Cu 2+ Reduction to metallic copper realizes the recycling of metallic copper. The present invention is further described in conjunction with following example.

[0070] 1. Metal copper recovery device in waste printed circuit boards:

[0071] The structure of metal copper recovery device in waste printed circuit board is as follows: figure 2 As shown, it includes: microbial fuel cell anode chamber 1, carbon fiber brush anode electrode 2, bipolar membrane 3, microbial fuel cell cathode chamber 4, graphite plate cathode electrode 5, wire 6, resistor 7, wire 8, data acquisition system 9, Connecting pipe 10, liquid delivery pump 11, connecting pipe 12, d...

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Abstract

The invention discloses a recovery device and a recovery method of metallic copper of a waste printed circuit board. The device comprises a microbial fuel cell, a reactor for leaching copper of the waste printed circuit board and an Fe<2+> biological oxidation reactor. The recovery method comprises the steps: firstly, iron-oxidizing bacteria in the Fe<2+> biological oxidation reactor oxidizes Fe<2+> into Fe<3+>; then the solution containing Fe<3+> is inputted into the reactor for leaching copper of the waste printed circuit board, the metallic copper is oxidized into Cu<2+> by Fe<3+>, and at the same time, Fe<3+> is reduced into Fe<2+>; and finally, the solution containing Cu<2+> is inputted into a cathode chamber of the microbial fuel cell, Cu<2+> is reduced into the metallic copper in the cathode chamber of the microbial fuel cell, while Fe<2+> in the cathode chamber of the microbial fuel cell is inputted to the Fe<2+> biological oxidation reactor and then is oxidized into Fe<3+>. The recovery device and the recovery method not only reduce the energy consumption, but also can gain electric energy, and simultaneously reduce the use of chemical reagents and the environmental pollution of organic waste.

Description

[0001] technical field [0002] The invention relates to a recovery device and recovery method for metal copper in waste printed circuit boards, specifically utilizing microbial fuel cells, metal copper leaching reactors in waste printed circuit boards and Fe 2+ The invention discloses a device and method for recovering metallic copper in waste printed circuit boards by a biological oxidation reactor. Background technique [0003] With the development and progress of human civilization and science and technology, the consumption of mineral resources is increasing day by day. Due to the increasing depletion of high-grade mineral resources, there will be a shortage of resources in the metal production process, which requires people to extract metals from various ores and industrial waste. [0004] In recent years, with the acceleration of the economy and the upgrading of information equipment, the popularity of various electronic products has also increased. At the same time,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B3/18C25C1/12C22B15/00
CPCY02P10/20
Inventor 李侠蒋海明张金山
Owner INNER MONGOLIA UNIV OF SCI & TECH
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