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Flotation is a process applied to separate the itabirite in its mineral components by the use of a depressor (gelatinized starch) which adsorbs preferentially on the surface of the iron minerals and then the adsorption of the collector (etheramine) aiming at hydrophobization of the quartz surface. Surfaces of quartz, hematite and compact itabirite were sanded and polished. Subsequently, a gelatinized starch conditioning was performed on the quartz and hematite surfaces. The characterization techniques used in this study were atomic force microscopy (AFM) and microscopy of reflected light, where the main characteristics of these surfaces can be distinguished.

Características das superfícies de itabirito compacto e seus componentes minerais principais com e sem adsorção de amido gelatinizado