PERSONAL DE APOYO
GONZALEZ Jorge Alberto
artículos
Título:
Purification of talcs by chlorination and leaching
Autor/es:
R.P. OROSCO; M. DEL C. RUIZ; L.I. BARBOSA; J.A. GONZALEZ
Revista:
INTERNATIONAL JOURNAL OF MINERAL PROCESSING
Editorial:
ELSEVIER SCIENCE BV
Referencias:
Lugar: Amsterdam; Año: 2011 vol. 101 p. 116 - 120
ISSN:
0301-7516
Resumen:
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 processwere thermogravimetry (TG), X-ray fluorescence (XRF), X-ray diffraction(XRD) and CieLab colorimetry. Experimental results showthat the pyrometallurgical process of chlorination is an efficientmethod for removing Fe2O3 fromtalc, 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, wasmade by chlorination with chlorine gas 1:1 in nitrogen, at temperatures over 800 °C. Experimental results show that deferrication can remarkably improve mineral coloration.
