Journal
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
Volume 6, Issue 4, Pages 5167-5176Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.jece.2018.07.040
Keywords
Iron ore tailing (I0T); Lixiviant activity; Leaching; Extraction; Residue
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Funding
- Tarbiat Moddarres University (TMU)
- Iranian Mines and Mining Industries Development and Renovation Organization (IMIDRO)
- Iran Mineral Processing Research Center (IMPRC)
- Sirjan Gol-Gohar Mining Co.
- Gol-Gohar Iron Ore and the Steel Research Institute
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This experimental study investigates the influence of H+ and Cl- ions on the leaching procedure of the iron ore tailings (IOT) using different lixiviants including various ratios of H2SO4/NaCl, and HCl. By using HYDRA/Spana software, the formed species of iron were identified as FeCl3, Fe(SO4)(2)(-) when using 5M H2SO4/2M NaCl, and FeCl3, FeCl2- when utilizing 5 M HCl as leaching lixiviant at 85 degrees C with significant iron recovery (> 85%) within 6 h. However, the combination of 5M H2SO4/2M NaCl was more advantageous for the leaching process due mainly to the increased activity of H+, as well as precipitated Ca+2 ions as gypsum. Eventually, for modelling purposes, the iron leaching process was found to fit well with the shrinking core model with surface-chemical-reaction control.
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