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Use of Phytic Acid for the Removal of Iron in Hot Acidic Leachate from Zinc Hydrometallurgy.
- Source :
- JOM: The Journal of The Minerals, Metals & Materials Society (TMS); Jun2021, Vol. 73 Issue 6, p1652-1660, 9p
- Publication Year :
- 2021
-
Abstract
- In zinc hydrometallurgy, hot-acidic leaching of calcines leads to Fe/Zn solutions in sulfuric acid medium. Three distinct processes have been previously developed to remove iron: jarosite, goethite and hematite. Each process displays their own drawbacks: important loss of zinc (jarosite, goethite), significant environmental impact of residue (jarosite) or economic cost (hematite). The work reported herein investigated the possibility of using phytic acid, a compound extractable from cereals, to remove iron. Precipitation was studied first at the laboratory-scale using DOE methodology and then with a laboratory pilot. At pH = 2.1, we showed that it is possible to remove up to 99.5% of iron with a loss of zinc equal to 0.6% and a residual concentration of Fe<superscript>III</superscript> of 130 mg L<superscript>−1</superscript>. Even if the amount of residue is more important than in the jarosite process, leaching tests showed that iron phytate could be stored in less drastic conditions than jarosite. [ABSTRACT FROM AUTHOR]
- Subjects :
- PHYTIC acid
IRON
LEACHATE
HYDROMETALLURGY
GOETHITE
ZINC
LEACHING
Subjects
Details
- Language :
- English
- ISSN :
- 10474838
- Volume :
- 73
- Issue :
- 6
- Database :
- Complementary Index
- Journal :
- JOM: The Journal of The Minerals, Metals & Materials Society (TMS)
- Publication Type :
- Academic Journal
- Accession number :
- 150611524
- Full Text :
- https://doi.org/10.1007/s11837-021-04640-y