Leaching valuable metals leaching process and the use of the method of recovering valuable metals

The present invention provides enables efficient leaching of valuable metals, is possible to reduce the amount of the reducing agent, there can be realized leaching valuable metals and valuable metals recovery process cost reduction. Feature of the present invention, the metal and the positive electrode material having a reduction potential lower than the reduction potential of a hydrogen co immersed in an acidic solution, so that the valuable metals leached from the positive electrode active material.