The Use of Hydroxide Precipitation and Reduction Methods in The Separation of Iron, Arsenic, and Antimony Impurities from Leached Solution of Silicate Ore Hemimorphite

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Ram Akram; Zandevakili Saeid

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Journal Paper

Paper Information

Journal: Nashrieh Shimi va Mohandesi Shimi Iran Year:2024 | Volume:43 | Issue:2 Page(s): 133-140

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Information Journal Paper

Title

The Use of Hydroxide Precipitation and Reduction Methods in The Separation of Iron, Arsenic, and Antimony Impurities from Leached Solution of Silicate Ore Hemimorphite

Author(s)

Ram Akram | Zandevakili Saeid | Issue Writer Certificate

Keywords

Zinc

hydroxide precipitation

reductive precipitation

Taguchi design expert

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.

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