关键词: 烟尘, 氧化锌, 有价金属

Abstract: On the basis of zinc oxide fly ash bearing multiple valuable metals,a whole hydrometallurgical technique for separation valuable metals from zinc oxide fly ash has been put forward.First,zinc oxide fly ash was leached by adding hydrogen peroxide and sulfuric acid，leaching liquor bearing zinc sulfate and indium sulfate and leaching residue bearing Pb and Bi were obtained by filtration and washing,and realized the separation of Zn and In from Pb and Bi.Leaching liquor realized the separation of Zn from In by P204 extraction.Lead sulfate in leaching residue was converted into lead carbonate by adding ammonium bicarbonate,and then lead carbonate reacted with added nitric acid,which realized the separation of Pb from Bi.On the one hand,the process realized the separation valuable metals from zinc oxide fly ash,on the other hand,zinc sulfate,indium sulfate,lead nitrate, and rich bismuth residue during the separation were used for producing the other chemical products.This process has supplied a new process for making comprehensive use of zinc oxide fly ash.

Key words: fly ash；zinc oxide, valuable metals