Title:
METHOD FOR COMPREHENSIVE RECYCLING POLYMETALLIC PRODUCTS FROM WASTE INTEGRATED CIRCUIT BOARDS BY PYROLYSIS
Document Type and Number:
WIPO Patent Application WO/2020/224053
Kind Code:
A1
Abstract:
A method for comprehensive recycling polymetallic products from waste integrated circuit boards by pyrolysis, comprising the steps of: (1) smelting and blending: adding polymetal obtained by pyrolysis of waste integrated circuit boards into a smelting furnace, and adding a covering agent to perform smelting and blending; (2) atomization: atomizing an alloy liquid obtained in step (1) to obtain atomized powder and atomized gas; (3) acidolysis and filtration: immersing in an acidolysis solution the atomized powder obtained in step (2) to perform acidolysis, and performing filtration to obtain an acid hydrolysate and acidolysis residue; (4) copper extraction and reverse extraction: performing copper extraction and reverse extraction on the acid hydrolysate obtained in step (3) to obtain copper sulfate and copper raffinate; (5) nickel extraction and reverse extraction: performing nickel extraction and reverse extraction on the copper raffinate obtained in step (4) to obtain nickel sulfate and nickel raffinate, and the nickel raffinate being used in the acid hydrolysis filtration step as a supplementary solution for the acid hydrolysis solution.
Inventors:
PAN DEAN (CN)
WU YUFENG (CN)
LI BIN (CN)
WU YUFENG (CN)
LI BIN (CN)
Application Number:
PCT/CN2019/096265
Publication Date:
November 12, 2020
Filing Date:
July 17, 2019
Export Citation:
Assignee:
UNIV BEIJING TECHNOLOGY (CN)
International Classes:
C22B7/00; C22B11/00; C22B15/00; C22B23/00
Foreign References:
| CN110004299A | 2019-07-12 | |||
| CN1172167A | 1998-02-04 | |||
| CN102534226A | 2012-07-04 |
Attorney, Agent or Firm:
BEIJING SIHAI TIANDA INTELLECTUAL PROPERTY AGENCY LTD. (CN)
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