Method for treating metal dust obtained in condenser-preparing process

摘要

PURPOSE: A method for treating metal dust generated during condenser manufacturing process is provided to recover tin, lead and zinc from the metal dust generated during manufacturing of a condenser, and treat the metal dust so that tin and lead can be used as solder. CONSTITUTION: The method for treating metal dust generated during condenser manufacturing process comprises the steps of separating zinc melted out in a liquid phase by reacting the materials after mixing 150 to 250 L of water and 15 to 25 L of sulfuric acid with 200 kg of metal dust containing tin, lead and zinc generated during manufacturing of a condenser(S1,S2); washing the zinc separated metal dust with water(S3); heating the resulting material in the temperature range of 350 to 450 deg.C by adding 3 to 7 kg of zinc chloride and 3 to 7 kg of ammonium chloride to the metal dust after putting the washed metal dust into a melting furnace(S4); and recovering a mixed metal of tin and lead obtained after the step S4 (S5), wherein the recovered mixed metal of tin and lead is used as solder.