Author/Authors
Orosco، نويسنده , , R.P. and Ruiz، نويسنده , , M. del C. and Barbosa، نويسنده , , L.I. and Gonzلlez، نويسنده , , J.A.، نويسنده ,
DocumentNumber
3268107
Title Of Article
Purification of talcs by chlorination and leaching
شماره ركورد
9927
Latin Abstract
The use of chlorine in talcs deferrication has been studied in four samples taken from the province of Mendoza, Argentina. The techniques used in this process were thermogravimetry (TG), X-ray fluorescence (XRF), X-ray diffraction (XRD) and CieLab colorimetry. Experimental results show that the pyrometallurgical process of chlorination is an efficient method for removing Fe2O3 from talc, by volatilizing it as FeCl3. Previous leaching of the sample with HCl 10% (w/w) produced the elimination of carbonates, and a slight iron removal. Quantitative elimination of iron, both in untreated samples and leached ones, was made by chlorination with chlorine gas 1:1 in nitrogen, at temperatures over 800 °C. Experimental results show that deferrication can remarkably improve mineral coloration.
From Page
116
NaturalLanguageKeyword
Talcs , Thermogravimetry , Chlorination , Leaching
JournalTitle
Studia Iranica
To Page
120
To Page
120
Link To Document