USEFUL ELEMENTS IN BRINE FLOWING INTO THE COPPER ORE MINES OF THE FORE-SUDETIC MONOCLINE

2017 ◽  
pp. 93-104
Author(s):  
Krzysztof Chudy ◽  
Magdalena Worsa-Kozak
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Water Solution ◽  
Copper Ore ◽  
Mining Areas ◽  
Wide Range ◽  
Northern Zone ◽  
Mine Sites ◽  
Exchange Resins ◽  
Zoning Effect

Technologies that are currently available and still being improved are based on ion-exchange resins or membrane filters and allow carrying out effective recovery of a wide range of significantly low-concentrated elements out of the water solution. They also make it possible to lower the discharge of unwanted substances into the environment during, e.g., dewatering of mine sites. It was the reason why KGHM Cuprum Ltd Research & Development Centre undertook research in order to determine the potential of waters inflowing into the excavations of the KGHM Polska Miedź S.A. mines as a source of useful elements, including the rare earth elements. The paper presents the preliminary results of studies on contents of selected useful elements in the waters inflowing into the excavations of the Sieroszowice and Rudna mining areas (northern zone). They indicate that, due to higher concentrations, the analyzed waters might be used as a potential source of lithium, boron, rubidium, cesium and some other elements. In the study area, a zoning effect in the distribution of useful elements has been noticed. Ten zones with elevated contents of mainly lithium and boron have been distinguished there, and they were selected for further studies focused, among others, on the determination of the occurrence of rare earth elements.

scholarly journals Bioleaching of Uranium Tailings as Secondary Sources for Rare Earth Elements Production

Minerals ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 302
Author(s):  
Nicolas Reynier ◽  
Roselyne Gagné-Turcotte ◽  
Lucie Coudert ◽  
Sophie Costis ◽  
Rory Cameron ◽  
...  
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Uranium Mine ◽  
Secondary Source ◽  
Mineralogical Characterization ◽  
Secondary Sources ◽  
Different Temperatures ◽  
Mine Sites ◽  
Exchange Resins ◽  
Uranium Tailings

Tailings from inactive uranium mine sites represent a potential secondary source of rare earth elements (REEs). For this study, two mine tailings (DT and RAT) from restored uranium sites in Ontario, Canada, were used. Bioleaching experiments were conducted with a mix of native sulfur- and iron-oxidizing bacteria to test the solubilization of REEs, U and Th at different temperatures (20, 30 and 40 °C). The selective recovery of REEs from bioleaching solution was evaluated using different ion exchange resins. The mineralogical characterization revealed that DT tailings were mainly composed of quartz, pyrite, gypsum and silicates, whereas RAT tailings were mainly composed of quartz. The maximum solubilization of heavy and light REEs (HREEs and LREEs, respectively), Th and U reached 54%, 6%, 60% and 51% for RAT after 35 days at pH 2, T = 30 °C and pulp density = 10% (w/v). Higher extraction yields were obtained for DT, with 58% of HREEs, 14% of LREEs, 85% of Th and 89% of U solubilized under the same conditions. The use of Lewatit TP272 resin for the recovery of Sc (94%) and U (99%) followed by the Lewatit SP112 resin for the recovery of Th (57%) and REEs (81% LREEs and 65% HREEs) seemed a promising method for the co-extraction of the key elements from the bioleaching solution.

scholarly journals Development of methods for the recovery оf rare-earth elements from the mineral resources of the Arctic

2021 ◽  
Author(s):  
E. P. Lokshin ◽  
◽  
O. A. Tareeva ◽  
◽  
◽  
...  
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Raw Materials ◽  
Mineral Resources ◽  
The Arctic ◽  
Resource Saving ◽  
Apatite Concentrate ◽  
Naturally Occurring ◽  
Wide Range ◽  
Rare Earth Mineral

This paper summarizes the findings of the research aimed at the development of a new method for the integrated processing of naturally occurring and anthropogenic rare-earth raw materials based on the decomposition of rare-earth element (REE) concentrates in the presence of sulfocationite. Sorption and desorption of REE cations on a strongly acidic ion exchanger, sorbent regeneration, and REE recovery from eluates are discussed. A virtually zero-waste integrated process for apatite concentrate is proposed. The generalization of the research findings is aimed at demonstrating the prospects and universality of the proposed resource-saving and environmentally safe approach to the processing of various types of naturally occurring and anthropogenic rare-earth mineral feeds. The new methodology made it possible to develop a number of new hydrochemical processes united by a single approach, providing a qualitative increase in the processing performance of various types of rare-earth mineral feeds. The theoretical foundations of a unified approach to the processing of a wide range of minerals can significantly accelerate and cheapen the implementation of specific process circuits, significantly reduce reagent consumption and waste generation, simplify the separation of rare earth elements and impurities, and the separation of rare earth elements from naturally occurring radionuclides, fluorine, and phosphorus. The study was funded by the Kolarctic CBC 2014-2020 program, Project KO1030 SEESIMA — Supporting Environmental Economic and Social Impacts of Mining Activity.

Investigation on Producing the Flux Cored Wire Modified with Concentrated Complex from Tomtor Mineral Assets

2019 ◽  
Vol 945 ◽  
pp. 706-711
Author(s):  
A.K. Kychkin ◽  
G.G. Vinokurov ◽  
N.F. Struchkov
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
High Hardness ◽  
Multiple Use ◽  
Cored Wire ◽  
Shift Analysis ◽  
Wide Range ◽  
Placer Deposits ◽  
Cored Wires ◽  
Comparative Examination

Multiple use of pan concentrate from placer deposits directly in technical process without prealltoment of pure components could become one of promising directions in the field of receiving wide range of multicomponent metal and ceramic powdered materials. In this paper as the object of comparative examination, we present the hemimethylated plating made of exploited experimentative flux cored wires based on industrial Ni-Cr-B-Si system powder modified with rare-earth elements of concentrated complex from Tomtor mineral assets Republic of Sakha (Yakutia). The structure of received plating is heterogeneous and has oxidation coating as boundaries. According to the data of the phase shift analysis plating predominantly consist of Fe-Ni austenitic alloy phases with the Cr, Si carbide and Cr boride precipitation strengthening, plating generally consist of Al2O3, Cr2O3 и Fe2O3 oxide. The research of the plating ultimate composition testifies the equable allocation of main and alloying elements, local location of some elements in the structure of the plating. Microhardness of flux cored wire plating substantially depends on composition and fabricated structure. It has been established that the introduction of rare earth elements provided the formation of strengthening phase with the high hardness of plating resulting in wear resistance increase.

Geochemical evolution of the Chatham–Grenville stock, Quebec

1985 ◽  
Vol 22 (6) ◽  
pp. 872-880 ◽  
Author(s):  
Michael Denis Higgins
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Mass Balance ◽  
Major Element ◽  
Parental Magma ◽  
Alkali Feldspar ◽  
Geochemical Evolution ◽  
Wide Range ◽  
The Mean

The Chatham–Grenville stock is an anorogenic multiple intrusion that shows a complete gradation from early cumulate and noncumulate syenites to slightly peralkaline granites. It can be divided into four units. Unit 1, the first unit, is a noncumulate syenite with modal quartz less than 5%. Unit 2 has a wide range in composition from cumulate syenites (no modal quartz) to noncumulate syenites and quartz syenites (modal quartz = 20%). Units 3 and 4 are granites with modal quartz up to 25 and 30%, respectively. The parental magma of the whole complex was syenitic. Differentiation occurred as a result of crystal fractionation by filter pressing both at depth and in situ. Ba, Sr, Rb, and Eu abundances and major-element mass-balance calculations show that alkali feldspar, mafic minerals, and apatite were fractionated. At least 79% fractionation is necessary to transform the mean composition of the first unit (1) into the mean composition of the last unit (4). The rare-earth elements, Th, Ta, Hf, and Zr, did not behave in a residual fashion but may have been fractionated in minor accessory phases such as apatite, zircon, monazite, allanite, and xenotime.

scholarly journals Geochemical Occurrence of Rare Earth Elements in Mining Waste and Mine Water: A Review

Minerals ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 860
Author(s):  
Konstantina Pyrgaki ◽  
Vasiliki Gemeni ◽  
Christos Karkalis ◽  
Nikolaos Koukouzas ◽  
Petros Koutsovitis ◽  
...  
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Mine Water ◽  
Bauxite Residue ◽  
Ore Deposits ◽  
Mining Waste ◽  
Toxic Substances ◽  
Mining Areas ◽  
High Concentrations ◽  
The Comparative Study

Μining waste, processing by-products and mine water discharges pose a serious threat to the environment as in many cases they contain high concentrations of toxic substances. However, they may also be valuable resources. The main target of the current review is the comparative study of the occurrence of rare earth elements (REE) in mining waste and mine water discharges produced from the exploitation of coal, bauxite, phosphate rock and other ore deposits. Coal combustion ashes, bauxite residue and phosphogypsum present high percentages of critical REEs (up to 41% of the total REE content) with ΣREY content ranging from 77 to 1957.7 ppm. The total REE concentrations in mine discharges from different coal and ore mining areas around the globe are also characterised by a high range of concentrations from 0.25 to 9.8 ppm and from 1.6 to 24.8 ppm, respectively. Acid mine discharges and their associated natural and treatment precipitates seem to be also promising sources of REE if their extraction is coupled with the simultaneous removal of toxic pollutants.

scholarly journals Terephthalaldehyde–Phenolic Resins as a Solid-Phase Extraction System for the Recovery of Rare-Earth Elements

Polymers ◽  
2022 ◽  
Vol 14 (2) ◽  
pp. 311
Author(s):  
Ruth Oye Auke ◽  
Guilhem Arrachart ◽  
Romain Tavernier ◽  
Ghislain David ◽  
Stéphane Pellet-Rostaing
Keyword(s):  
Rare Earth ◽  
Ion Exchange ◽  
Solid Phase Extraction ◽  
Rare Earth Elements ◽  
Solid Phase ◽  
Extraction System ◽  
Ion Exchange Resins ◽  
Phase Extraction ◽  
Phenolic Resins ◽  
Exchange Resins

Rare-earth elements (REEs) are involved in most high technology devices and have become critical for many countries. The progress of processes for the extraction and recovery of REEs is therefore essential. Liquid–solid extraction methods are an attractive alternative to the conventional solvent extraction process used for the separation and/or purification of REEs. For this purpose, a solid-phase extraction system was investigated for the extraction and valorization of REEs. Ion-exchange resins were synthesized involving the condensation of terephthalaldehyde with resorcinol under alkaline conditions. The terephthalaldehyde, which is a non-hazardous aromatic dialdehyde, was used as an alternative to formaldehyde that is toxic and traditionally involved to prepare phenolic ion-exchange resins. The resulting formaldehyde-free resole-type phenolic resins were characterized and their ion-exchange capacity was investigated in regard to the extraction of rare-earth elements. We herein present a promising formaldehyde and phenol-free as a potential candidate for solid–liquid extraction REE with a capacity higher than 50 mg/g and the possibility to back-extract the REEs by a striping step using a 2 M HNO3 solution.

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