journal6 ›› 2010, Vol. 31 ›› Issue (5): 96-100.

• Chemistry and chemical engineering • Previous Articles     Next Articles

Preparation of Nanometer Zinc Oxide Powders by Wet Leaching of Low-Grade Zinc Oxide Ore


  1. (College of Chemistry and Chemical Engineering,Jishou University,Jishou 416000,Hunan China)
  • Online:2010-09-25 Published:2012-04-12

Abstract: The pure ZnSO4 solution was obtained by low-grade ZnO ore as raw materials after the process of H2SO4 leaching and purification.Nanometer ZnO powders were prepared by direct precipitation method using NH4HCO3 as precipitator.The effects of various factors such as the mole ratio of NH4HCO3 to ZnSO4,reaction temperature,reaction time,thermal decomposition temperature and time of basic zinc carbonate precursors on the particle size of nanometer powders  and the precipitation rate or the purity of ZnO were investigated systematically.XRD and SEM were used to characterize the structure and size of ZnO particle.The results show that the ZnO powders with hexagonal structure,spherical morphologies,40 nm of average crystal size and 97.5% of purity are obtained.The main technical indices of nanometer ZnO powders prepared by the above route met GB/T19589—2004 National Standard.The processes are simple and easy for industrialization.

Key words: low-grade zinc oxide ore, direct precipitation method, nanometer zinc oxide

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