TANTALUM RECOVERY METHOD

摘要

A tantalum recovery method which with which it is possible to recover tantalum from waste containing relatively large quantities of copper and tungsten, such as discarded boards, including printed circuit boards in particular. Therein, magnetic separation is carried out, and tantalum-containing waste obtained by separating tantalum-containing substances in tantalum-containing waste is subjected to acid treatment in an oxidizing atmosphere, then subsequently subjected to roasting and alkali treatment, thereby reducing the copper and tungsten contained in the tantalum-containing waste, and making it possible to recover high-purity tantalum.