Evaluation of Estonian phosphate rock by flotation
| Autor: | Rein Kuusik, Indrek Piir, Kadriann Tamm, Xiaosheng Yang, Kaia Tõnsuaadu, Andres Trikkel |
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| Rok vydání: | 2021 |
| Předmět: |
Mechanical Engineering
Geochemistry Beneficiation General Chemistry Geotechnical Engineering and Engineering Geology Phosphate Estonian language.human_language Apatite Igneous rock chemistry.chemical_compound chemistry Phosphorite Control and Systems Engineering visual_art language visual_art.visual_art_medium Sedimentary rock Reverse flotation Geology |
| Zdroj: | Minerals Engineering. 171:107127 |
| ISSN: | 0892-6875 |
| DOI: | 10.1016/j.mineng.2021.107127 |
| Popis: | Estonia holds the largest unexploited sedimentary phosphate rock reserves in the EU. Compared to other sedimentary and also igneous phosphate rocks the Estonian phosphorite is particularly outstanding by its remarkably low Cd (1–5 ppm) and trace U content (~50 ppm) and also contains valuable elements such as rare earth elements (REEs), which could be used in important high-technologies in the future. In this paper beneficiation by reverse flotation of the silicates for three types of Estonian phosphorite ores was investigated. The apatite concentrates with grades of over 33 wt% P2O5 at recoveries of 84.8 to 89.2% were achieved. The concentrates had low MgO contents and grades of FeO ranged from 1.29 up to 2.54 wt%. The study gives an overview of the specifics of enrichment of Estonian shelly phosphorite ores, provides a ground for future in-depth and pilot-scale experiments to find proper solutions for the Estonian phosphorite processing and will be applied in the feasibility studies of the phosphorite industrialization. |
| Databáze: | OpenAIRE |
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