Documents disponibles écrits par cet auteur

Automated analysis of aluminium bath electrolytes by the Rietveld method / Karsten Knorr in Minerals engineering, Vol. 22 N° 5 (Avril 2009) 

Public ISBD [article]  in Minerals engineering > Vol. 22 N° 5 (Avril 2009) . - pp. 434–439 Titre : Automated analysis of aluminium bath electrolytes by the Rietveld method Type de document : texte imprimé Auteurs : Karsten Knorr, Auteur ; Chris Kelaart, Auteur Année de publication : 2009 Article en page(s) : pp. 434–439 Note générale : Génie Minier Langues : Anglais (eng) Mots-clés : Non-ferrous  metallic  ores  Electrometallurgy  Process  control Résumé : Rietveld analysis emerged as a routine tool in quantitative phase analysis of crystalline powder samples. Here, XRD data from solidified aluminium electrolytes were rapidly obtained with a 1-dimensional silicon strip detector and analysed with the TOPAS software. It is shown how to calculate well established process control measures such as Bath ratio and excess AlF3 from the Rietveld results. These measures are widely used in aluminium production and are readily calculated with very high precision. The excellent agreement with Alcan reference data demonstrates the outstanding accuracy of the method. Furthermore, it is shown how to improve conventional Potflux analysis by the Rietveld method. Finally, the automated investigation of aluminium bath samples in AXSLAB is outlined. DEWEY : 622 ISSN : 0892-6875 En ligne : http://www.sciencedirect.com/science/article/pii/S0892687508002720 [article] Automated analysis of aluminium bath electrolytes by the Rietveld method [texte imprimé] / Karsten Knorr, Auteur ; Chris Kelaart, Auteur . - 2009 . - pp. 434–439. Génie Minier Langues : Anglais (eng) in Minerals engineering > Vol. 22 N° 5 (Avril 2009) . - pp. 434–439 Mots-clés : Non-ferrous  metallic  ores  Electrometallurgy  Process  control Résumé : Rietveld analysis emerged as a routine tool in quantitative phase analysis of crystalline powder samples. Here, XRD data from solidified aluminium electrolytes were rapidly obtained with a 1-dimensional silicon strip detector and analysed with the TOPAS software. It is shown how to calculate well established process control measures such as Bath ratio and excess AlF3 from the Rietveld results. These measures are widely used in aluminium production and are readily calculated with very high precision. The excellent agreement with Alcan reference data demonstrates the outstanding accuracy of the method. Furthermore, it is shown how to improve conventional Potflux analysis by the Rietveld method. Finally, the automated investigation of aluminium bath samples in AXSLAB is outlined. DEWEY : 622 ISSN : 0892-6875 En ligne : http://www.sciencedirect.com/science/article/pii/S0892687508002720