2024 - Sustainable Industrial Processing Summit
SIPS 2024 Volume 2. Anastassakis Intl. Symp / Mineral Processing
| Editors: | F. Kongoli, L. Andric, K. Aravossis, V. Chanturiya, I. Chatjigeorgiou, D. Fuerstenau, C. Kavalopoulos, C. O'Connor, V. Panayotov, J. Rubinstein |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2024 |
| Pages: | 384 pages |
| ISBN: | 978-1-998384-06-8 (CD) |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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LEACHING OF FLOTATION TAILINGS WITH A SOLUTION OF SULFURIC ACID AND IONIC LIQUID IN THE PRESENCE OF HYDROGEN PEROXIDE
Dragana Marilović1; Grozdanka Bogdanović1;1UNIVERSITY OF BELGRADE, Bor, Serbia;
Type of Paper: Regular
Id Paper: 244
Topic: 5
Abstract:
Flotation tailings is waste material produced during the flotation process. Proper management and storage of these raw material is crucial to minimizing negative environmental impacts. The main elements contained in flotation tailings are copper (0.13 %) and iron (4.22 %). In addition, the tailings contain zinc, lead, aluminum, magnesium and calcium. The application of hydrometallurgical operations is possible for raw materials with a low metal content or a complex composition. The right choice of reagents is important for a successful process. Sulfuric acid is used as one of the most common reagents for the leaching copper from flotation tailings. [1] On the other hand, ionic liquids are recognized as green reagents due to their characteristics such as viscosity, thermal stability, negligible volatility, non-toxicity and high conductivity. [2] The leaching experiments were carried out in a sulfuric acid solution (H2SO4) and an ionic liquid solution 1-butyl-3-methyl-imidazolium hydrogen sulfate ([bmim]HSO4) in the presence of hydrogen peroxide (H2O2). The diluted solution was analysed for copper and iron using a multiparameter photometer and ICP-OAS. Reagents concentrations of 0.01 mol/dm3 and 0.05 mol/dm3 without hydrogen peroxide were also tested. Leaching flotation tailings with sulfuric acid, the copper leaching degree reached 71.05% at lower solution concentrations and 76.59% at higher solution concentrations. When leaching flotation tailings with an ionic liquid solution of the same concentrations, the copper leaching degree was 72.57% and 77.10% for 0.01 mol/dm³ and 0.05 mol/dm³, respectively as shown in a previous study [3]. When leaching with sulfuric acid and in the presence of 0.1 mol/dm3 H2O2, the leaching degree of copper was 80.85% at the lower concentration of the solution and 82.24% at the higher concentration of the solution. In the leaching of flotation tailings with an ionic liquid solution of the same concentrations, and in the presence of 0.1 mol/dm3 H2O2, the leaching degree of copper was 72.56% (for 0.01 mol/dm3) and 83.14% (for 0.05 mol/dm3). The dissolution of iron was <5% under the tested conditions. These results indicate that hydrogen peroxide has a slight effect for the leaching process of flotation tailings. At the higher acid concentrations tested for both reagents, a greater influence of hydrogen peroxide can also be observed.