• 专利标题:   Recycling metal in waste circuit board comprises e.g. gradually heating and separating according to metal melting point to obtain gold, palladium, platinum and rhodium powder after placing solid mixture in flexible carbon felt electrolysis.
  • 专利号:   CN112517616-A, CN112517616-B
  • 发明人:   LAI Z, ZHONG Z, WANG J, ZHANG X, ZHONG Y, LAI Y, CHEN L
  • 专利权人:   HUIZHOU NINGTAILIN ENVIRONMENTAL TECHNOL
  • 国际专利分类:   B09B003/00, B09B005/00, C22B011/02, C22B007/00, C25C005/02, B09B003/30, B09B003/35, B09B003/40, B09B003/70
  • 专利详细信息:   CN112517616-A 19 Mar 2021 B09B-003/00 202132 Pages: 7 Chinese
  • 申请详细信息:   CN112517616-A CN11441920 11 Dec 2020
  • 优先权号:   CN11441920

▎ 摘  要

NOVELTY - Recycling metal in waste circuit board comprises (1) placing discarded circuit board in the reaction tank and soaking it in the dispersant aqueous solution, applying high-voltage pulses, discharging the discarded circuit boards with 300 pulses until they are broken under the conditions of plate spacing 25-35 mm, pulse frequency 3-5 Hz, voltage 160-180 kV, and passing through 10-mesh sieve after drying, where those that can be sieved are metal-rich groups, and those that cannot be sieved are non-metal-rich groups, (2) separating non-metal-rich group by airflow sorting to separate metal particles with high density after being crushed, and subjecting remaining non-metal-rich group to electrostatic separation after pulse dust removal to separate resin fiber and metal particles, and (3) mixing the metal particles obtained in the step (2) and the metal-rich group, and separating iron powder by weak magnetic separator. USE - The method is useful for recycling metal in waste circuit board. ADVANTAGE - The method enables recovery of metal from waste circuit board with high separation efficiency.