Upgrading of a rare earth phosphate concentrate within the nitrophosphate process

The reserve of sedimentary phosphate deposits in Guizhou province in western China is huge, but has been no development because of its difficulties of comprehensive utilization. Using mineral processing techniques, Rare earth containing phosphate rock flotation and flotation concentrate leaching test study were done. Rare earth enrichment in those processes was studied too. Through rougher flotation conditions test, it was determined that the optimal rougher flotation conditions were grinding fineness 75% -0.074mm, H2SO4, H3PO4 and SOP dosage of 10kg/t, 0.15kg/t and 0.8 kg/t. A reverse flotation flowsheet consisted of one roughing, one cleaning and one scavenging stage was used for the closed-circuit flotation tests. Phosphate concentrate could be got with P2O5, MgO, REE grade of 31.87%, 0.98%, 0.15% and recovery of 85.83%, 8.84%, 86.81% respectively. P2O5 recoveries and REE recoveries of phosphate concentrate was a positive linear relationship. Under the condition of liquid/solid3:1, acid/ore ratio 1.2, leaching time 3.5 hours and temperature 75°C, the phosphate concentrate was leached by sulfuric acid. The better indicators that P2O5 leaching rate of 95.92% and REE leaching rate of 52.11% could got.

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Processing of a rare earth phosphate concentrate obtained in the nitrophosphate process of fertilizer production

Hydrometallurgy ◽

10.1016/j.hydromet.2019.105144 ◽

2019 ◽

Vol 189 ◽

pp. 105144 ◽

Cited By ~ 2

Author(s):

Mahmood Alemrajabi ◽

Åke C. Rasmuson ◽

Kivanc Korkmaz ◽

Kerstin Forsberg

Keyword(s):

Rare Earth ◽

Fertilizer Production ◽

Rare Earth Phosphate ◽

Phosphate Concentrate

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Diffraction studies of rare-earth phosphate glasses

Journal of Non-Crystalline Solids ◽

10.1016/s0022-3093(99)00583-9 ◽

2000 ◽

Vol 270 (1-3) ◽

pp. 234-246 ◽

Cited By ~ 23

Author(s):

A.G. Shikerkar ◽

J.A.E. Desa ◽

P.S.R. Krishna ◽

R. Chitra

Keyword(s):

Rare Earth ◽

Phosphate Glasses ◽

Rare Earth Phosphate

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Catalysis by rare earth phosphate II: Selective o-methylation of phenols by methanol in vapor phase

The Roots of Organic Development - Industrial Chemistry Library ◽

10.1016/s0926-9614(96)80009-8 ◽

1996 ◽

pp. 48-61 ◽

Cited By ~ 2

Author(s):

Laurent Gilbert ◽

Marcelle Janin ◽

Anne-Marie Le Govic ◽

Pascale Pommier ◽

Alain Aubry

Keyword(s):

Rare Earth ◽

Vapor Phase ◽

Rare Earth Phosphate

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(La0.2Ce0.2Nd0.2Sm0.2Eu0.2)PO4: A high-entropy rare-earth phosphate monazite ceramic with low thermal conductivity and good compatibility with Al2O3

Journal of Material Science and Technology ◽

10.1016/j.jmst.2019.08.012 ◽

2019 ◽

Vol 35 (12) ◽

pp. 2892-2896 ◽

Cited By ~ 11

Author(s):

Zifan Zhao ◽

Heng Chen ◽

Huimin Xiang ◽

Fu-Zhi Dai ◽

Xiaohui Wang ◽

...

Keyword(s):

Thermal Conductivity ◽

Rare Earth ◽

Low Thermal Conductivity ◽

High Entropy ◽

Rare Earth Phosphate

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Vitusite — an apatite derivative structure

Mineralogical Magazine ◽

10.1180/minmag.1992.056.383.10 ◽

1992 ◽

Vol 56 (383) ◽

pp. 235-239 ◽

Cited By ~ 3

Author(s):

Adrian A. Finch ◽

James G. Fletcher

Keyword(s):

Rare Earth ◽

Late Stage ◽

Sensu Stricto ◽

Hydrothermal Fluids ◽

Stable Phase ◽

Synthetic Analogue ◽

Apatite Structure ◽

Phosphate Mineral ◽

Rare Earth Phosphate ◽

Rare Earth Substitution

AbstractThe uncommon sodium rare-earth phosphate mineral vitusite-(Ce) (Na3RE(PO4)2) can be considered as the extreme product of sodium and rare-earth substitution in the apatite structure. Lesser amounts of substitution provide sodium and rare-earth-bearing apatites up to about 80 mol.% exchange; beyond this point vitusite is the stable phase. The structure of vitusite, determined previously from a synthetic analogue, can also be considered as a derivative from apatite, but with cations exchanged on sites normally occupied by anions. Vitusite can therefore be considered as a sodium- and rare-earthrich apatite end-member, with a distinct, but apatite-derived, structure, formed in highly persodic and high rare-earth environments. From an examination of the literature on diffusion in apatite, vitusite in principle could be formed from apatitesensu strictoby subsolidus diffusion in response to late-stage NaandRE-rich hydrothermal fluids.

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