Recovery of Catapleiite and Eudialyte from Non-Magnetic Fraction of Eudialyte ore Processing of Norra Kärr Deposit
Eudialyte ores from Norra Kärr (Sweden) and Kringlerne (Greenland) are considered a potential source of rare-earth elements (REE) for the development of a sustainable REE industry outside China. Magnetic separation is successfully applicated to recover eudialyte as a magnetic fraction. In the case o...
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2021
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ftmdpi:oai:mdpi.com:/2075-163X/12/1/19/ 2023-08-20T04:06:57+02:00 Recovery of Catapleiite and Eudialyte from Non-Magnetic Fraction of Eudialyte ore Processing of Norra Kärr Deposit Ivan Silin Devrim Gürsel Christian Büchter Lars Weitkämper Hermann Wotruba agris 2021-12-23 application/pdf https://doi.org/10.3390/min12010019 EN eng Multidisciplinary Digital Publishing Institute Mineral Processing and Extractive Metallurgy https://dx.doi.org/10.3390/min12010019 https://creativecommons.org/licenses/by/4.0/ Minerals; Volume 12; Issue 1; Pages: 19 Norra Kärr eudialyte ore REE zirconosilicates catapleiite eudialyte selective flotation phosphoric acid esters nepheline-syenite Text 2021 ftmdpi https://doi.org/10.3390/min12010019 2023-08-01T03:38:22Z Eudialyte ores from Norra Kärr (Sweden) and Kringlerne (Greenland) are considered a potential source of rare-earth elements (REE) for the development of a sustainable REE industry outside China. Magnetic separation is successfully applicated to recover eudialyte as a magnetic fraction. In the case of the Norra Kärr deposit, up to 20% of the REE and up to 40% of the Zr are lost during mineral processing in the non-magnetic fraction. Zr and REE are associated with non-magnetic minerals such as catapleiite, low- or non-magnetic eudialyte species, and both their intergrowths. Besides zirconosilicates such as catapleiite and eudialyte, the non-magnetic fraction has valuable and already-liberated minerals such as alkali feldspars and nepheline, which should not be considered as tailings. In this investigation, a possible way to recover REE bearing zirconosilicates from the non-magnetic fraction using flotation is presented. First, a low-grade eudialyte concentrate (1.8% Zr, 0.94% REE) from ground ore was obtained using magnetic separation. The non-magnetic fraction was then treated using froth flotation, and a Zr-REE bearing product (9% Zr, 1.5% REE) was obtained as froth product. For this purpose, phosphoric acid esters were used as selective collectors for zirconosilicates at a pH between 3.5 and 4.5. The reagent regime could be proposed not only to recover Zr- and REE-bearing minerals, but also simultaneously to remove Fe, Ti, and other colored impurities from the nepheline-feldspar product and to minimize the tailings volume. Text Greenland MDPI Open Access Publishing Greenland Minerals 12 1 19 |
institution |
Open Polar |
collection |
MDPI Open Access Publishing |
op_collection_id |
ftmdpi |
language |
English |
topic |
Norra Kärr eudialyte ore REE zirconosilicates catapleiite eudialyte selective flotation phosphoric acid esters nepheline-syenite |
spellingShingle |
Norra Kärr eudialyte ore REE zirconosilicates catapleiite eudialyte selective flotation phosphoric acid esters nepheline-syenite Ivan Silin Devrim Gürsel Christian Büchter Lars Weitkämper Hermann Wotruba Recovery of Catapleiite and Eudialyte from Non-Magnetic Fraction of Eudialyte ore Processing of Norra Kärr Deposit |
topic_facet |
Norra Kärr eudialyte ore REE zirconosilicates catapleiite eudialyte selective flotation phosphoric acid esters nepheline-syenite |
description |
Eudialyte ores from Norra Kärr (Sweden) and Kringlerne (Greenland) are considered a potential source of rare-earth elements (REE) for the development of a sustainable REE industry outside China. Magnetic separation is successfully applicated to recover eudialyte as a magnetic fraction. In the case of the Norra Kärr deposit, up to 20% of the REE and up to 40% of the Zr are lost during mineral processing in the non-magnetic fraction. Zr and REE are associated with non-magnetic minerals such as catapleiite, low- or non-magnetic eudialyte species, and both their intergrowths. Besides zirconosilicates such as catapleiite and eudialyte, the non-magnetic fraction has valuable and already-liberated minerals such as alkali feldspars and nepheline, which should not be considered as tailings. In this investigation, a possible way to recover REE bearing zirconosilicates from the non-magnetic fraction using flotation is presented. First, a low-grade eudialyte concentrate (1.8% Zr, 0.94% REE) from ground ore was obtained using magnetic separation. The non-magnetic fraction was then treated using froth flotation, and a Zr-REE bearing product (9% Zr, 1.5% REE) was obtained as froth product. For this purpose, phosphoric acid esters were used as selective collectors for zirconosilicates at a pH between 3.5 and 4.5. The reagent regime could be proposed not only to recover Zr- and REE-bearing minerals, but also simultaneously to remove Fe, Ti, and other colored impurities from the nepheline-feldspar product and to minimize the tailings volume. |
format |
Text |
author |
Ivan Silin Devrim Gürsel Christian Büchter Lars Weitkämper Hermann Wotruba |
author_facet |
Ivan Silin Devrim Gürsel Christian Büchter Lars Weitkämper Hermann Wotruba |
author_sort |
Ivan Silin |
title |
Recovery of Catapleiite and Eudialyte from Non-Magnetic Fraction of Eudialyte ore Processing of Norra Kärr Deposit |
title_short |
Recovery of Catapleiite and Eudialyte from Non-Magnetic Fraction of Eudialyte ore Processing of Norra Kärr Deposit |
title_full |
Recovery of Catapleiite and Eudialyte from Non-Magnetic Fraction of Eudialyte ore Processing of Norra Kärr Deposit |
title_fullStr |
Recovery of Catapleiite and Eudialyte from Non-Magnetic Fraction of Eudialyte ore Processing of Norra Kärr Deposit |
title_full_unstemmed |
Recovery of Catapleiite and Eudialyte from Non-Magnetic Fraction of Eudialyte ore Processing of Norra Kärr Deposit |
title_sort |
recovery of catapleiite and eudialyte from non-magnetic fraction of eudialyte ore processing of norra kärr deposit |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2021 |
url |
https://doi.org/10.3390/min12010019 |
op_coverage |
agris |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland |
genre_facet |
Greenland |
op_source |
Minerals; Volume 12; Issue 1; Pages: 19 |
op_relation |
Mineral Processing and Extractive Metallurgy https://dx.doi.org/10.3390/min12010019 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/min12010019 |
container_title |
Minerals |
container_volume |
12 |
container_issue |
1 |
container_start_page |
19 |
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