QUANTITATIVE CHARACTERIZATION OF PHASES PRESENT INALUMINUM DROSSES THROUGH X-RAY DIFFRACTION

摘要

White dross is a result of the aluminum oxidation during its primary production and is mainlycomposed of metallic aluminum, Al2O3, with minor amounts of AlN and some other oxides.Because of the great variety of phases, the quantitative characterization is complicated. Thiswork shows a quantitative method to determine the main phases of white aluminum drosses bymeans of X-ray diffraction (the Rietveld method). Nowadays the Rietveld method is maybe themost useful method for obtaining quantitative phases information in multicomponent mixtures,this method permits relatively quick quantitative phase analysis by fitting the calculated X-raydiffraction profile with the observed one. The analysis were done using powder with a grainsize less than 45 μm; to obtain the suitable material size the aluminum dross was grounded byten minutes, several times. The grounded material was screened, and the material smaller than45 μm was taken to quantitative XRD analysis.