| Issue |
E3S Web Conf.
Volume 266, 2021
Topical Issues of Rational Use of Natural Resources 2021
|
|
|---|---|---|
| Article Number | 02002 | |
| Number of page(s) | 15 | |
| Section | Technologies of Complex Processing of Mineral Raw Materials | |
| DOI | https://doi.org/10.1051/e3sconf/202126602002 | |
| Published online | 04 June 2021 | |
Increasing the depth of apatite processing by extracting rare-earth elements
St. Petersburg Mining University, St. Petersburg, Russia
Currently, most high-technology productions are impossible without rare-earth elements (REE). The heavy rare-earth elements are of great interest as they have the highest market value and are in demand in the vast majority of knowledge-intensive industries. The main recourse of REE in Russia is apatite ore which is used in the production of fertilizers. As a result of its leaching, about 15-20% of REE goes to wet-process phosphoric acid. To enhance the depth of apatite processing, it is necessary to develop a technology which will allow obtaining rare-earth elements as by-products. The method of extraction and concentration of REE discussed in this paper was conducted by using the extractant based on di-(2-ethylhexyl) phosphoric acid (D2EHPA). The mechanism of extraction was studied, as well as the impact of the extractant concentration, phase ratio and the number of stages on the extraction process.
© The Authors, published by EDP Sciences, 2021
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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