Method for separating and recovering tin and zinc from tin-zinc metal spraying powder

The invention discloses a method for separating and recovering tin and zinc from tin-zinc metal spraying powder, and belongs to the technical field of non-ferrous metal hydrometallurgy. The method comprises the specific steps that the tin-zinc metal spraying powder is added into sulfuric acid with the liquid-to-solid ratio of (2-6):1 for leaching, filtrate 1 and filter slag 1 are obtained throughfiltering and washing after a reaction is finished, the filter slag 1 is conveyed into an Ausmelt furnace or an electric furnace for reduction smelting, and then tin with the purity of 99.9% or abovecan be obtained through pyro-refining; zinc powder is added into the filtrate 1 for replacement, filtrate 2 and filter slag 2 are obtained through filtering and washing after a reaction is finished, and tin with the purity of 99.9% or above can be obtained after the filter slag 2 is subjected to pyro-refining; and electrolysis is performed by using the filtrate 2 as an electrolyte, an aluminum plate as a cathode, and a lea