Tecnologia em Metalurgia, Materiais e Mineração
Tecnologia em Metalurgia, Materiais e Mineração
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Ribeiro, Tamara Mariana Guilherme; Brandão, Paulo Roberto Gomes

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The evaluation of a graphite deposit inevitably involves the determination of graphitic carbon content in the ore. This work consisted in a detailed assessment of the method for the determination of this element in graphite ore samples using a process, which involves acid leaching, calcination, combustion and infrared detection stages. From the data obtained, it was possible to understand the importance of each one of these operations and to identify the optimal conditions for the analysis with a significant turnaround time reduction. The optimized methodology was then validated with certified reference materials according to selected parameters. Inter-laboratory tests were carried out with ore samples from Almenara/Brazil graphite deposit. The data demonstrate that the method is very appropriate for determining the graphitic carbon content in ore samples, generating reliable and high quality results.


Graphite, Graphitic carbon, Analysis, Method.


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