关键词: 铅锌废渣;纳米ZnO;焙烧温度

Abstract: The nano-ZnO was prepared by extraction,purification,evaporation,drying and roasting with lead-zinc slag as zinc sources.XRD,IR,TGA and DSC of the ZnO precursor indicate that the precursor is amorphous basic zinc carbonate(Zn5(CO3)2(OH)6),and in the course of heating it broke down into ZnO and Zn(OH)2, and then Zn(OH)2was furtherly decomposed into ZnO.XRD, SEM and particle size analysis of the roasted products show that the decomposed product roasted at 400℃is zincite(ZnO) and Ashoverite(Zn(OH)2), and the products at 500 ℃ and 600 ℃ are zincite(ZnO)and its morphology is irregular,but the particle size of the product at 500℃is between 80-150 nm,and there is the very apparent agglomeration in the products at 600 ℃.

Key words: lead-zinc slag;nano-ZnO;roasting temperature