Method for leaching and recycling valuable elements of copper smelting smoke dust

The invention discloses a method for leaching and recycling valuable elements of copper smelting smoke dust, and belongs to the technical field of hydrometallurgy. The method comprises the following steps of mixing smoke dust and concentrated sulfuric acid according to a certain acid-dust ratio for pretreatment; carrying out dilute sulfuric acid leaching on the smoke dust, carrying out solid-liquid separation to obtain a primary leachate and primary leaching residues, and feeding the leaching residues to a lead smelting system for recycling; adding an alkaline reagent into the primary leachate, so that arsenic in the solution is removed in a stable arsenate solid form; recovering valuable metals such as copper, cadmium and the like by a replacement method, adding zinc powder into the solution after arsenic precipitation, and precipitating and recovering the valuable metals such as copper and the like from the solution in the form of sponge copper at a certain temperature for a certain time; and concentrating,