Dépôt Institutionnel de l'Université Ferhat ABBAS - Sétif 1 >
Revues Scientifiques >
Verres, Céramiques & Composites >
Volume 2, numéro 02 >
Caractérisation physico-chimique du gypse synthétisé et du phosphogypse >

Veuillez utiliser cette adresse pour citer ce document : http://dspace.univ-setif.dz:8888/jspui/handle/123456789/303

Titre: Caractérisation physico-chimique du gypse synthétisé et du phosphogypse
Auteur(s): Karim, F.
Waqif, M.
Saadi, L.
Mots-clés: Gypsum
synthesized gypsum
Physicochemical properties
Date de publication: 2013
Collection/Numéro: Volume 2;N°2
Résumé: The phosphogypsum is a waste sub-product of the production of the phosphoric acid, and a basic component in the manufacture of modern manures. It allows the concentration of the impurities of the basic ore, and often poses problems of storage and safeguarding of the environment. On the other hand, this gypsum can be used as raw materialto manufacture plaster after purification. Our work was focused on a comparative study of thephysicochemical characterisatization of two synthesized samples referred respectively GSHCa, GSNaCa and the phosphogypsum which result of the attack of the ore of phosphate by thesulphuric acid. The synthesized gypsum (CaSO 4 2H 2O) was elaborated starting from calcium nitrate Ca(NO3)2 4H 2O, the sulphuric acid (H2SO4) or sulphate sodium (Na 2SO4 ). The studied products were characterized by various physicochemical techniques and analysis (granulometry, X-Ray Diffraction (XRD), Infra Red, X-ray fluorescence, Scanning Electron Microscopy (SEM) and DifferentialScanning Calorimeter (DSC). The results obtained show that the synthesized samples and the phosphogypsum are made up mainly of gypsum (CaSO 4, 2H2 O). Thermal treatment under dry conditions of thesesamples led to the formation of semi-hydrated (CaSO4, ½H 2O) at 200°C and anhydrous CaSO 4II at 450°C and CaSO4I at 1200°C.
URI/URL: http://dspace.univ-setif.dz:8888/jspui/handle/123456789/303
Collection(s) :Caractérisation physico-chimique du gypse synthétisé et du phosphogypse

Fichier(s) constituant ce document :

Fichier Description TailleFormat
Caracterisation-physico-chimique-du-gypse-synthétisé-et-du-phosphogypse-2-2-4.pdf372,53 kBAdobe PDFVoir/Ouvrir
View Statistics

Tous les documents dans DSpace sont protégés par copyright, avec tous droits réservés.


Valid XHTML 1.0! Ce site utilise l'application DSpace, Version 1.4.1 - Commentaires