Method for separating and recovering tin, copper and iron from waste tinned copper-clad iron pins

The invention discloses a method for separating and recovering tin, copper and iron from waste tinned copper-clad iron pins. The method can implement clean high-efficiency full-dose recovery on abundant waste tinned copper-clad iron pins produced by electronic processing industry, implements technical-process closed circulation, well solves the common problems of high energy consumption, low metal recovery rate, difficulty in comprehensive recovery of valuable metals, heavy pollution and the like in the traditional waste tinned copper-clad iron pin process, and has the outstanding advantages of simple process, high metal recovery rate, high cleanness and environment friendliness.