Method and system for collaborative smelting and recycling valuable metal from waste circuit board, scrap copper and copper-containing waste residue

The embodiment of the invention discloses a method and system for collaborative smelting and recycling valuable metal from a waste circuit board, scrap copper and copper-containing waste residue. Themethod comprises the steps that the waste circuit board, the scrap copper and the copper-containing waste residue are mixed and are subject to high-temperature smelting to obtain a metal alloy and slag; an anode plate is made of a metal alloy, and through electrolysis, a cathode copper product is obtained; copper anode mud and slag are combined, and through sulfuric acid leaching, leaching liquidis obtained; the leaching liquid is subject to metal replacement, nickel tin powder is separated out, and through alloying smelting, and a nickel and tin alloy product is obtained; filter liquid replacement is carried out, through alkali deposition, ferric hydroxide is separated out, and through burning, a ferric oxide product is obtained; liquid obtained after sedimentation is subject to evaporative crystallization, and a