The use of hydroxide and reductive precipitation methods in the separation of iron, arsenic and antimony impurities from leached solution of Hemimorphite silicate ore

Articles in Press

Document Type : Research Article

Authors

1 Department of Mining Engineering, Faculty of Technology and Engineering, Vali-e- Asr University of Rafsanjan, Rafsanjan, Iran

2 Department of Mining Engineering, Faculty of Technology and Engineering, Vali-e- Asr University, of Rafsanjan, Rafsanjan, Iran

Abstract

The purpose of this research is to separate iron, arsenic and antimony impurities from zinc silicate ore leach solution using precipitation methods including hydroxide precipitation, by changing pH and reduction precipitation, by changing oxidation/reduction potential. The optimum condition to remove impurities with minimal zinc loss, achieved in the presence of Ca(OH)2, pH = 4.5, temperature of 70°C, in 40 minutes by hydroxide precipitation, and 0.5g/liter of zinc powder, 60°C and 60 minutes by reduction precipitation. In these conditions, most of the main impurities, including 98% iron and arsenic ions, more than 80% of antimony ions and approximately 60.5% of copper ions, were removed. Furthermore, in these conditions, only 5.63% of zinc ions were lost. Therefore, the most part of PLS impurities, were removed before solvent extraction, by performing a successive pre-purification. The results showed that the pH parameter and the precipitant agent had the greatest effect on the precipitation process.

Keywords

Main Subjects

Nashrieh Shimi va Mohandesi Shimi Iran

Articles in Press, Accepted Manuscript
Available Online from 09 April 2024

Files

Share

How to cite

Statistics