THERMOPHOSPHATE FERTILIZERS FROM SIILINJARVI APATITE

Authors
VEIDERMA M TONSUAADU K
Citation
M. Veiderma et K. Tonsuaadu, THERMOPHOSPHATE FERTILIZERS FROM SIILINJARVI APATITE, Acta polytechnica Scandinavica. Ch, Chemical technology and metallurgy series, (239), 1996, pp. 5
Citations number
23
Categorie Soggetti
Engineering, Chemical",Chemistry
Journal title
Acta polytechnica Scandinavica. Ch, Chemical technology and metallurgy series → ACNP
ISSN journal
07812698
Issue
239
Year of publication
1996
Database
ISI
SICI code
0781-2698(1996):239<5:TFFSA>2.0.ZU;2-8
Abstract
The structure of Siilinjarvi apatite and its thermal properties, its d ecomposition in the mixture with H3PO4 and nepheline or shungite at ca lcination up to 1400 degrees C, the phase composition and the solubili ty of the calcined product in 2% citric acid solution have been studie d by chemical, IR and XRD analyses. A comparison of thermal processing of Kovdor apatite and Siilinjarvi apatite is presented. A product con taining 98.8% citrate soluble P2O5 of the total P2O5 content (38%) fro m Siilinjarvi apatite concentrate was obtained.