Leaching of rare earths from fine-grained zirconosilicate ore
| Autor: | Jacques Eksteen, Don Ibana, Hazel Lim |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Metallurgy
chemistry.chemical_element 02 engineering and technology General Chemistry Yttrium 021001 nanoscience & nanotechnology 020501 mining & metallurgy law.invention Dilution Cerium Taguchi methods 0205 materials engineering Magazine chemistry Leaching (chemistry) Geochemistry and Petrology law Grind Lanthanum 0210 nano-technology |
| Zdroj: | Journal of Rare Earths. 34:908-916 |
| ISSN: | 1002-0721 |
| DOI: | 10.1016/s1002-0721(16)60114-x |
| Popis: | Leaching of rare earths Y, La and Ce by sulphuric acid from fine-grained zirconosilicate ore was investigated using Taguchi method of experimental design. An orthogonal array of L 8 , 2 7 which denotes 7 factors at 2 levels was chosen to consider the various factors relevant to the leaching process: baking time, baking temperature, acid dosage, leaching time, leaching temperature, grind size and dilution. Statistical analysis showed that sulphation baking was a significant step for the leaching of rare earths from the whole-of-ore and optimized leaching of rare earths involved the following condition: baking for 3 h at 320 °C at 3.2 g acid/g ore acid dosage followed by water leaching at 20 °C for 1 h and dilution of 20 mL water/g ore using 300 um grind size. The effect of each leaching factor was also discussed. |
| Databáze: | OpenAIRE |
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