Metal recovery method, metal recovery device, metal recovery system, and metal particle manufacturing method

摘要

[Problem] To provide a metal recovery method and a metal recovery apparatus which allow a metal to be recovered from a solution at low cost with high efficiency. [Solution] A metal recovery apparatus 100 according to the present invention is provided with: a reaction tank 21 which allows a basic first solution containing ions of at least one element selected from the group of gold, silver, copper, palladium, rhodium, platinum, iridium, ruthenium and osmium to be in contact with silicon 90; and a recovery unit 12 for recovering metal precipitates comprising the abovementioned elements on the silicon 90.