Method for recovering alkali metal and precious metal from waste mobile phone circuit board

• Main Authors: SONG QINGBIN, ZHAO YUANLIN, HUANG QING, ZHANG XIANG, CAI KAIHAN, YUAN WENYI, XU LIJUN
• Format: Patent
• Language: Chinese; English
• Published: 23.01.2024
• Subjects: APPARATUS THEREFOR; CHEMISTRY; ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; FERROUS OR NON-FERROUS ALLOYS; METALLURGY; PRETREATMENT OF RAW MATERIALS; PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY ORREFINING OF METALS; PRODUCTION AND REFINING OF METALS; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The method comprises the following specific experimental steps: (1) crushing the waste mobile phone circuit board, and grinding the waste mobile phone circuit board into nano-scale powder by using a mechanical ball milling method; (2) immersing the powder obtained in the step (1) into an electrolytic bath containing electrolyte and an additive for electrolysis; (3) after the reaction is finished, taking out the negative plate, recovering alkali metal, filtering and washing, and carrying out magnetic separation to obtain high-purity metal copper; (4) filtering and recovering filter residues, and recovering, concentrating and recycling electrolyte; (5) adding the filter residues recycled in the step (4) into an electrolytic bath, and adding electrolyte for secondary electrolysis; and (6) recovering crude gold on the cathode after the reaction is finished. The whole experiment process is clean, efficient, free of secondary pollution, environmentally friendly, low in recovery cost, friendly to the environment and