Method for preparing high-purity copper by using waste copper foil

• Main Authors: YU HAOSONG, LIANG DONG, WANG FEI, XU BAOQIANG, JIANG WENLONG, TIAN YANG, HU JUNXIAN, WANG SHUANGPING, LIU DACHUN, WANG DONG, WANG LONGZHENG, XU MINGHAO, YANG BIN, LI YIFU
• Format: Patent
• Language: Chinese; English
• Published: 02.01.2024
• 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 invention provides a method for preparing high-purity copper from waste copper foil, and belongs to the technical field of high-purity copper preparation. The invention provides a method for directly preparing 6N high-purity copper from waste copper foil through vacuum distillation-electrolytic refining to solve the problems that waste copper foil with the copper content of 99% or above is difficult to directly utilize, and an existing high-purity copper preparation process is high in energy consumption, complex in impurity variety and difficult to remove. Firstly, the waste copper foil is subjected to vacuum distillation, so that volatile impurity elements such as Al, Cd, Bi, K, Mg, Zn and Pb are gasified and volatilized, impurities such as As, Sb and Bi which are difficult to remove from copper foil raw materials under the electrolysis condition are separated on the basis of purifying the waste copper foil in the process, and the preparation technological process of the high-purity copper is shortened;