Effect of Flotation Time and Collector Dosage on Estonian Phosphorite Beneficiation

Phosphorus is an essential and non-substitutable element for the cellular processes of all living organisms. The main source phosphorus in biosphere phosphate rock. With more than 700 Mt rock, Estonia holds largest sedimentary rock deposits European Union. Estonian particularly outstanding due to its remarkably low content hazardous heavy metals such as Cadmium (<5 ppm) trace elements Uranium (<50 ppm). It also a reliable valuable rear earth (REEs). aim this study was investigate distribution minerals (apatite quartz) between slimes, tailings, concentrates that formed at froth flotation with up-to-date level know-how techniques. Subsequently, relationship obtained grades recovery levels determined based on collector dosage duration. observed fine fraction tailings contains 17.9–33.49 wt% P2O5 can be added final product. Moreover, it found that, lower collector, extended time does not influence grade high amount quartz remains concentrates. shown by raising setting time, adequate (>32 P2O5) (up 98%) gained. results showed beneficiated produce high-quality concentrate modifying parameters depending properties ore.