Metallurgical characterization of kaolin from Atacama, Chile
AUTOR(ES)
Rivera, Oscar, Pavez, Osvaldo, Kao, Julia Li, Nazer, Amin
FONTE
REM, Int. Eng. J.
DATA DE PUBLICAÇÃO
2016-12
RESUMO
Abstract In order to determine the exploitation potentiality of a kaolin deposit from Atacama in the north of Chile, two types of kaolin (K-1 and K-2) were characterized by XRD, XRF, SEM/EDXS, size distribution, whiteness and DSC. Kaolinite, quartz, muscovite and albite were recognized as main constituents of the ore deposit, and also a significant amount of impurities that negatively impacts on quality were detected. Results show that the low quality presented by the samples, especially K-2, impedes their industrial use as raw material and further mineral concentration processes are proposed. Finally, the results of thermal analysis confirm a conversion to metakaolin that could be the basis for an alternative processing route.
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