POTENTIAL RECOVERY OF CRITICAL ELEMENTS FROM HISTORICAL METAL MINING WASTE: THE EFFECTIVENESS OF USING VARIOUS LEACHANTS TO EXTRACT PRECIOUS METALS, PLATINUM GROUP ELEMENTS, SELECTED RARE-EARTH-ELEMENTS, AND VARIOUS INDUSTRIAL METALS

2016 ◽  
Author(s):  
Philip L. Hageman ◽  
◽  
Kathleen S. Smith ◽  
Ruth E. Wolf ◽  
Geoffrey S. Plumlee ◽  
...  
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Precious Metals ◽  
Platinum Group Elements ◽  
Mining Waste ◽  
Metal Mining ◽  
Critical Elements ◽  
Platinum Group ◽  
Industrial Metals

scholarly journals Minerals-concentrators of rare-earth elements in basites-ultrabasites intrusives of Norilsk district

2017 ◽  
pp. 56-65
Author(s):  
Yu. D. Gritsenko ◽  
A. A. Serova
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Platinum Group Elements ◽  
Sulfide Ores ◽  
Solid Contact ◽  
Heavier Lanthanides ◽  
Ree Distribution ◽  
History Of ◽  
Platinum Group ◽  
History Of Formation

The conditions of being, the history of formation and transformation of minerals-concentrators of rare-earth elements (REE) - apatite minerals group and epidote minerals group, have been studied and described. Allanite has been determined to be mostly developed in the halos of the fluid action a solid contact of sulfide ores containing rich pneu matolytic mineralization of the platinum-group elements (PGM) and gold. Apatite and allanite are found among sulfides and in rims of the fluid action over the drops of sulphides in the horizon of the disseminated ores. The composition of Apatite-I has evolved from a OH-containing chlorapatite to chlorapatite containing up to 2,3 wt. % of lanthanides; Apatite-II - from OH-Cl-bearing fluorapatite to fluorapatite. The lanthanides reieased during replacement of chlorapatite-I by fluorapatite-II, probably entering the composition of the produced pneumatoiytic alianite-(Ce). In the areas of mineral ores with imposed metamorphism, the pneumatoiytic apatite partially or totally is substituted by hydroxyapatite-III, allanite - by water-containing allanite with the content of the epidote and clinozoisite minals - 30-35 mol. %. The spectra of REE distribution in apatite have been determined to reflect more accurately their ratios in rocks, the spectra of REE distribution for allanite are characterized by a steeper slope from lighter to heavier lanthanides. The ratio of La, Ce and Nd in chlorapatite corresponds to the distribution of these elements as in the host picrite horizon, as well in the rocks of the intrusives as a whole. Allanite, in return, is more enriched in cerium and lanthanum and depleted in neodymium.

Levels of platinum group elements and rare-earth elements in wild mushroom species growing in Poland

2015 ◽  
pp. 1-9 ◽  
Author(s):  
Mirosław Mleczek ◽  
Przemysław Niedzielski ◽  
Pavel Kalač ◽  
Marek Siwulski ◽  
Piotr Rzymski ◽  
...  
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Platinum Group Elements ◽  
Wild Mushroom ◽  
Mushroom Species ◽  
Platinum Group

scholarly journals Distribution Kinetics of Rare Earth Elements in Copper Smelting

2019 ◽  
Vol 12 (1) ◽  
pp. 208 ◽  
Author(s):  
Lassi Klemettinen ◽  
Riina Aromaa ◽  
Anna Dańczak ◽  
Hugh O’Brien ◽  
Pekka Taskinen ◽  
...  
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Slag System ◽  
Green Technology ◽  
Copper Smelting ◽  
Critical Elements ◽  
Dependent Behavior ◽  
Similar Chemical ◽  
Sample Characterization ◽  
New Applications

The use of rare earth elements (REEs) is increasing, mainly due to the growing demand for electric vehicles and new applications in green technology. This results in annual growth of the in-use REE stocks and the amount of End-of-Life (EoL) products containing REEs. REEs are considered critical elements by the EU, mainly because the rest of the world is dependent on China’s supply. Recycling of REEs can help alleviate the criticality of REEs, however, no REEs are currently functionally recycled. In this study, the time-dependent behavior of REEs in copper matte-slag system in primary copper smelting conditions was investigated experimentally at a laboratory scale. Lanthanum and neodymium were chosen to represent all REEs, as they are generally found in the highest concentrations in EoL products, and because REEs all have similar chemical behavior. The experiments were conducted as a function of time in air and argon atmospheres. SEM-EDS, EPMA and LA-ICP-MS methods were used for sample characterization. The results of this work indicate that the REEs strongly favor the slag and the deportment to the slag begins almost instantly when the system reaches high temperatures. With increasing contact times, the REEs distribute even more strongly into the slag phase, where they may be recovered and recycled, if their concentrations are sufficiently high and a suitable hydrometallurgical process can be found.

scholarly journals Material efficiency: rare and critical metals

2013 ◽  
Vol 371 (1986) ◽  
pp. 20110563 ◽  
Author(s):  
Robert U. Ayres ◽  
Laura Talens Peiró
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Platinum Group Metals ◽  
Rare Metals ◽  
Critical Metals ◽  
The Past ◽  
Material Efficiency ◽  
Aluminium Copper ◽  
Copper Zinc ◽  
Industrial Metals

In the last few decades, progress in electronics, especially, has resulted in important new uses for a number of geologically rare metals, some of which were mere curiosities in the past. Most of them are not mined for their own sake (gold, the platinum group metals and the rare Earth elements are exceptions) but are found mainly in the ores of the major industrial metals, such as aluminium, copper, zinc and nickel. We call these major metals ‘attractors’ and the rare accompanying metals ‘hitch-hikers’. The key implication is that rising prices do not necessarily call forth greater output because that would normally require greater output of the attractor metal. We trace the geological relationships and the functional uses of these metals. Some of these metals appear to be irreplaceable in the sense that there are no known substitutes for them in their current functional uses. Recycling is going to be increasingly important, notwithstanding a number of barriers.

scholarly journals Editorial for the Special Issue “Innovative and Applied Research on Platinum-Group and Rare Earth Elements”

Minerals ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 493
Author(s):  
Maria Economou-Eliopoulos ◽  
Federica Zaccarini ◽  
Giorgio Garuti
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Applied Research ◽  
Mineral Exploration ◽  
Special Issue ◽  
Platinum Group

This Special Issue “Innovative and Applied Research on Platinum-group and Rare Earth Elements” is dedicated to the work and memory of Demetrios Eliopoulos, IGME (Institute of Geology and Mineral Exploration), Greece who passed away on 19 April 2019 [...]

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