Alkaline leaching of zinc from low-grade oxide zinc ore using ammonium citrate as complexing agent

Green Processing and Synthesis

article

Shiwei Li¹  Aiyuan Ma¹  Kun Yang¹  Shaohua Yin¹  Libo Zhang¹  Jinhui Peng¹  Weiheng Chen¹  Feng Xie¹ 

[1] State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology;Yunnan Provincial Key Laboratory of Intensification Metallurgy;National Local Joint Laboratory of Engineering Application of Microwave Energy and Equipment Technology;Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology

关键词: ammonium citrate;    low grade zinc oxide ore;    zinc recovery;   

DOI  :  10.1515/gps-2015-0023

来源: De Gruyter

【 摘 要 】

In this study, the effect of ammonium citrate (AC) on the leaching of low grade zinc oxide ore in the 5 m ammonia solution was studied. AC served as a leaching agent and complexing agent, respectively. The results of the leaching experiments showed that AC increased the leaching rate of zinc, which increased with the rise of the concentration of AC. Under conditions of temperature of 30°C, reaction time of 60 min, citric acid concentration of 1 mol/l and solid to liquid ratio of 1:5, 88.83% of zinc was leached. The enhancement mechanism of AC to the leaching rate of zinc was studied by Fourier transform infrared (FT-IR) spectra.

【 授权许可】

CC BY