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This work present the results of technological characterization performed with purified talc from soapstone residues from Santa Rita de Ouro Preto, after leaching flotation concentrates with sodium dithionite and hydrochloric acid. The technological characterization consisted of size distribution performed by laser diffraction (Cilas 1064), X ray diffraction (total powder method), chemical analysis, performed by optical emission spectroscopy - inductively coupled plasma, density and whiteness ISO determinations. The whiteness of purified talc with sodium dithionite and hydrochloric acid were of 70.3 and 79.6%, respectively. This means an increase of 3 and 9% compared with flotation concentrate whiteness. About 80% of talc particles in leached samples were smaller than 10 μm. The minerals talc and chlinoclore were identified in X ray patterns. The higher increase in whiteness with hydrochloric acid is related with the decrease of Fe2O3, Ni, Zn compared with feed (flotation concentrate)

CARACTERIZAÇÃO DE TALCO PURIFICADO DE RESÍDUOS DE PEDRA SABÃO