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Leaching sulfur from pressure acid leaching residue of zinc concentrate: parameter optimization using response surface methodology

Lijuan Chu, Zebiao Zhang

2012ensulfur recoveryleachingresponse surface methodologyoptimizationhydrometallurgy

Abstract

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The pressure acid leaching residue of zinc concentrate contains a large quantity of sulfur. The present study attempts to leach sulfur using a mixture of ammonium sulfide and water solution at 25°C. Effects of three leaching variables: ammonium sulfide concentration, leaching time, and liquid/solid ratio on the sulfur leaching rate were investigated. The process conditions were optimized using response surface methodology based on the central composite design. From the analysis of variance (ANOVA), the significant factors on the response were identified. The optimum conditions for leaching elemental sulfur from pressure acid leaching residue of zinc concentrate were obtained using an ammonium sulfide concentration of 2.5 mol/L, a leaching liquid-solid ratio of 6.5:1, and a leaching time of 7 min. Under the optimum experimental conditions, a maximum of 98.50% of total sulfur was extracted. The experimental results obtained agreed satisfactorily with the model predictions, with a correlation coefficient (R2) of 0.99.

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Cite This Work

@article{f5f5d168-4d3e-4fd8-b7b8-dc63e124720c,
  title={Leaching sulfur from pressure acid leaching residue of zinc concentrate: parameter optimization using response surface methodology},
  author={Lijuan Chu and Zebiao Zhang},
  year={2012},
  language={en}
}
TY  - JOUR
TI  - Leaching sulfur from pressure acid leaching residue of zinc concentrate: parameter optimization using response surface methodology
AU  - Lijuan Chu
AU  - Zebiao Zhang
PY  - 2012
LA  - en
ER  -

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