METHOD OF COLLECTING GALLIUM FROM IGZO TARGET

摘要

The present invention relates to a method of retrieving gallium from an IGZO target, which includes the steps: a) preparing a leach solution for IGZO; b) introducing a pH control agent into the leach solution to separate a sediment containing gallium ions from the leach solution; c) putting the sediment into a basic solution to prepare an electrolyte; d) applying electricity to the electrolyte to extract metal containing gallium from the electrolyte; and e) removing zinc by vacuum-refining the metal. According to the method of retrieving gallium from the IGZO target of the present invention, only gallium can be effectively extracted from the IGZO included in a solar cell or an OLED waste, so that the circulation of gallium, which is a rare metal, can be significantly increased. In addition, the purity of retrieved gallium is at least 99.9%, so that high-purity gallium product can be produced. The high-purity gallium product is eco-friendly in that the wasted IGZO target is used as a source material, and the rare resources can be recycled. [Reference numerals] (AA) Prepare a leach solution.; (BB) Introduce zinc.; (CC) Introduce a pH control agent.; (DD) Introduce a basic solution; (EE) Collect electrolyte.; (FF) Vacuum refining.; (GG) Gallium.; (HH) Retrieve indium.; (II) Collect gallium hydroxide.; (JJ) Collect zinc.