scholarly journals Rare Earth Occurrences in Streams of Processing a Phosphate Ore

Minerals ◽  
2019 ◽  
Vol 9 (5) ◽  
pp. 262 ◽  
Author(s):  
Xiaosheng Yang ◽  
Hannu Tapani Makkonen ◽  
Lassi Pakkanen
Keyword(s):  
Rare Earth ◽  
Sulfuric Acid ◽  
Phosphoric Acid ◽  
Rare Earth Elements ◽  
Electron Probe Microanalysis ◽  
Electron Probe ◽  
Phosphate Ore ◽  
Mineral Liberation ◽  
Efficient Recovery ◽  
Liberation Analysis

Rare earth elements (REEs) are defined as lanthanides with Y and Sc. Rare earth occurrences including the REE-bearing phases and their distributions, measured by rare earth oxides (REOs), in the streams of processing a phosphate ore were determined by using MLA, the mineral liberation analysis and EPMA, the electron probe microanalysis. The process includes an apatite ore beneficiation by flotation and further processing of the beneficiation concentrate with sulfuric acid. Twenty-six, sixty-two and twelve percent of the total REOs (TREO) contents from the ore end up in the products of beneficiation tailings, phosphogypsum (PG) and phosphoric acid, respectively. Apatite, allanite, monazite and pyrochlore are identified as REE-bearing minerals in the beneficiation process. In the beneficiation tailings, the REEs are mainly distributed in monazite (10.3% TREO), apatite (5.9% TREO), allanite (5.4% TREO) and pyrochlore (4.3% TREO). Gypsum, monazite, apatite and other REE-bearing phases were found to host REEs in the PG and the REEs distributions are 44.9% TREO in gypsum, 15.8% TREO in monazite, 0.6% TREO in apatite and 0.6% TREO in other REE-bearing phases. Perspectives on the efficient recovery of REEs from the beneficiation tailings and the PG are discussed.

Synthetic TRPO4 crystals as reference samples in the quantitative X-ray electron probe microanalysis of rare-earth elements

2011 ◽  
Vol 66 (9) ◽  
pp. 831-837 ◽  
Author(s):  
Yu. G. Lavrent’ev ◽  
I. M. Romanenko ◽  
M. P. Novikov ◽  
L. V. Usova ◽  
V. N. Korolyuk
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Electron Probe Microanalysis ◽  
Electron Probe ◽  
X Ray ◽  
Reference Samples

scholarly journals EXTRACTION OF RARE EARTH ELEMENTS FROM SOLID WASTE OF PRODUCTION OF PHOSPHORIC ACID FOLLOWED BY SORPTION ON CATION EXCHANGE RESINS

2017 ◽  
Vol 60 (10) ◽  
pp. 87 ◽  
Author(s):  
Aleksandr V. Artamonov ◽  
Daria N. Smirnova ◽  
Nicolay N. Smirnov ◽  
Aleksandr P. Ilyin
Keyword(s):  
Rare Earth ◽  
Sulfuric Acid ◽  
Phosphoric Acid ◽  
Rare Earth Elements ◽  
Cation Exchange ◽  
Calcium Sulfate ◽  
Cation Exchanger ◽  
Raw Material ◽  
Cation Exchange Resins ◽  
Exchange Resins

The basis of production of extraction phosphoric acid is two simultaneous processes: dissolving phosphate raw material in a mixture of sulfuric and phosphoric (formed in the process) acids and crystallization of calcium sulfate (phosphogypsum). Phosphogypsum is an inevitable large-tonnage and cumbersome waste at sulfuric acid processing of apatite, which is of interest not only as a source of building gypsum, but also as an alternative rare earth raw material does not have a natural activity and containing rare-earth elements as a cerium and yttrium groups. As a raw material for the production of rare earth elements, calcium sulfate of three types has been used: phosphogypsum from a sludge accumulator, calcium phosphate phospho-hemihydrate and calcium sulfate phosphate dihydrate from a carousel filter produced by extraction phosphoric acid at JSC "PhosAgro-Cherepovets". The extraction of rare-earth elements from phosphogypsum from a sludge accumulator by leaching (percolation) with inorganic acids with subsequent sorption on cation-exchange resins is considered. As an adsorbent for extracting REE from leach solutions, cationite "Purolite" S-150 is used. A static exchange capacitance of cation exchanger is found that is the capacity of the resin when equilibrium is reached with a solution of a certain volume and composition. The static capacity of cation exchanger for rare-earth elements is 1.57%, which indicates a good absorbing capacity. Desorption of rare-earth elements from the cation exchanger is carried out with a solution of ammonium nitrate. The optimal solution for leaching was found to be sulfuric acid with a concentration of 5% by weight. The degree of extraction of rare-earth elements from phosphogypsum with sulfuric acid is about 82%.Forcitation:Artamonov A.V., Smirnova D.N., Smirnov N.N., Ilyin A.P. Extraction of rare earth elements from solid waste of production of phosphoric acid followed by sorption on cation exchange resins. Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol. 2017. V. 60. N 10. P. 87-93

Polyethylenimine-cross-linked cellulose nanocrystals for highly efficient recovery of rare earth elements from water and a mechanism study

2017 ◽  
Vol 19 (20) ◽  
pp. 4816-4828 ◽  
Author(s):  
Feiping Zhao ◽  
Eveliina Repo ◽  
Yang Song ◽  
Dulin Yin ◽  
Samia Ben Hammouda ◽  
...  
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Cellulose Nanocrystals ◽  
Chelating Agent ◽  
Mechanism Study ◽  
Highly Efficient ◽  
Cross Linker ◽  
Efficient Recovery

PEI acts not only as a cross-linker but also as a chelating agent for RE ions.

Phosphoric acid purification sludge: Potential in heavy metals and rare earth elements

2019 ◽  
Vol 83 ◽  
pp. 46-56 ◽  
Author(s):  
Marzougui Salem ◽  
Radhia Souissi ◽  
Fouad Souissi ◽  
Noureddine Abbes ◽  
Jacques Moutte
Keyword(s):  
Heavy Metals ◽  
Rare Earth ◽  
Phosphoric Acid ◽  
Rare Earth Elements

Electron probe microanalysis of rare earth doped gallium nitride light emitters

2018 ◽  
pp. 555-558
Author(s):  
S Dalmasso ◽  
R W Martin ◽  
P R Edwards ◽  
K P O'Donnell ◽  
B Pipeleers ◽  
...  
Keyword(s):  
Rare Earth ◽  
Gallium Nitride ◽  
Electron Probe Microanalysis ◽  
Electron Probe ◽  
Light Emitters ◽  
Rare Earth Doped
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