Patent ID: 6102982
Filing Date: 2000-08-15
Classification: C22B,Y02P,Y10S

Abstract:
A method for recovering zinc oxide comprising the steps of:(a) agglomerating a dust containing iron oxide and zinc oxide to form an agglomerate;(b) charging the agglomerate into molten iron in a melting furnace to reduce the iron oxide and the zinc oxide into iron and zinc, whereby the reduced iron enters the molten iron, the reduced zinc vaporizes and changes to zinc oxide and a flue dust containing the zinc oxide is generated from the melting furnace;(c) separately collecting the flue dust according to particle size from the coarse flue dust, said step of collecting the flue dust comprises:collecting a flue dust having a particle size of 10 .mu.m or more among the flue dust generated form the melting furnace; andcollecting a flue dust having a particle size of less than 10 .mu.m among the flue dust generated from the melting furnace,(d) recycling the flue dust having the particle size of 10 .mu.m or more to the agglomerating step (a); and(e) recovering the flue dust having the particle size of less than 10 .mu.m as a zinc source.