Quantificação de fases de um minério de ferro utilizando difração de raio-X e refinamento de Rietveld

Abstract

The characterization of iron ores is of great importance for their application in the production of the iron ore sinter. Obtaining information on the crystallographic properties, identification and quantification of phases present in the ore and crystallite size are information that can be valuable when it is desired to compose a mixture that will be sintered. In this work, X-ray diffraction and Rietveld's refinement were used to characterize an iron ore that is used to compose the sintering plant mixture of a Brazilian steel mill. With this study it was possible to identify and quantify the phases present in the material. It was also possible to identify the crystallographic structures of each phase and its network parameters. This information can be used to better understand the behavior of this iron ore during the sintering process and thus to predict with greater certainty the properties of the sinter that will originate with a mixture containing that material. Thus, it will be shown in this work that the application of X-ray diffraction and refinement of the data by the Rietveld method is a very useful tool and quick to gather important information of iron ores used in Brazilian steel mills.