Mineralogical and chemical investigation of Tunisian phosphate washing waste during calcination

Phosphate washing waste (PWW) is one of the wastes generated by the phosphate mine with a very high amount. This waste was investigated in this work to study the effect of the calcination of the PWW at four different temperatures 600 oC, 700 oC, 800 oC and 900 oC on its mineralogical and chemical co...

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Bibliographic Details
Published in:Journal of thermal analysis and calorimetry 2019-09, Vol.137 (5), p.1827-1840
Main Authors: Dabbebi, R., Aguiar, J. L. Barroso de, Samet, B., Baklouti, S.
Format: Article
Language:English
Subjects:
Analytical Chemistry
Apatite
Calcination
Calorimetry
Carbonates
Chemical composition
Chemistry
Chemistry and Materials Science
Clay minerals
Complex systems
Differential scanning calorimetry
Diffraction
DSC–TG
Engenharia Civil
Engenharia e Tecnologia
Fluorapatite
Fourier transforms
FTIR
Infrared analysis
Inorganic Chemistry
Investigations
Measurement Science and Instrumentation
Mineralogy
NMR
Nuclear magnetic resonance
Organic chemistry
Phosphate minerals
Phosphate rock
Phosphate washing waste
Physical Chemistry
Polymer Sciences
Roasting
Science & Technology
Thermogravimetric analysis
Washing
X ray powder diffraction
X-rays
XRD
Zeolites
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Summary:Phosphate washing waste (PWW) is one of the wastes generated by the phosphate mine with a very high amount. This waste was investigated in this work to study the effect of the calcination of the PWW at four different temperatures 600 oC, 700 oC, 800 oC and 900 oC on its mineralogical and chemical composition. The samples were investigated by X-ray powder diffraction, Fourier transform infrared, differential scanning calorimetry and thermogravimetric analysis, solidstate magic angle spinning nuclear magnetic resonance of 29Si, 27Al and 31P and scanning electron microscope. The results show that the PWW presents a complex system and it suffers a significant change on its mineralogical and chemical composition after calcination. It reveals the presence of carbonate, natural zeolite, fluorapatite, quartz and clay. After calcination, the waste shows the disappearance of some of these phases and the appearance of others and some other phases remain steady.
ISSN:1388-6150
1588-2926
DOI:10.1007/s10973-019-08057-3