ISSN 2594-357X
11º Seminário de Aglomeração de Minérios — Vol. 11, Num. 11 (2025)
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This investigation has been carried out to stablish the influence of microstructural characteristics on the reducibility and quality of iron ore pellets in order to understand how iron ore origin (hematite or magnetite) influence pellet performance. Hematite and magnetite-based pellets were analyzed using conventional characterization and advanced microscopy techniques, like SEM/EDS and SEM/EBSD. Reducibility evaluation was carried out through basket tests in HYL ZR reactor under plant operational conditions. The better results of reducibility and metallization was obtained for magnetite-based pellet with small grain size without coalescence and higher density of finely distributed pores. These findings highlight the importance of controlling microstructure to enhance both the operational performance and metallurgical quality of iron ore pellets.
THIS INVESTIGATION HAS BEEN CARRIED OUT TO STABLISH THE INFLUENCE OF MICROSTRUCTURAL CHARACTERISTICS ON THE REDUCIBILITY AND QUALITY OF IRON ORE PELLETS IN ORDER TO UNDERSTAND HOW IRON ORE ORIGIN (HEMATITE OR MAGNETITE) INFLUENCE PELLET PERFORMANCE. HEMATITE AND MAGNETITE-BASED PELLETS WERE ANALYZED USING CONVENTIONAL CHARACTERIZATION AND ADVANCED MICROSCOPY TECHNIQUES, LIKE SEM/EDS AND SEM/EBSD. REDUCIBILITY EVALUATION WAS CARRIED OUT THROUGH BASKET TESTS IN HYL ZR REACTOR UNDER PLANT OPERATIONAL CONDITIONS. THE BETTER RESULTS OF REDUCIBILITY AND METALLIZATION WAS OBTAINED FOR MAGNETITE-BASED PELLET WITH SMALL GRAIN SIZE WITHOUT COALESCENCE AND HIGHER DENSITY OF FINELY DISTRIBUTED PORES. THESE FINDINGS HIGHLIGHT THE IMPORTANCE OF CONTROLLING MICROSTRUCTURE TO ENHANCE BOTH THE OPERATIONAL PERFORMANCE AND METALLURGICAL QUALITY OF IRON ORE PELLETS.
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basket test in HYL ZR, microstructure of pellets, reducibility, SEM/EBSD
basket test in HYL ZR, microstructure of pellets, reducibility, SEM/EBSD
Como citar
Lugo, Ana Cecilia Cachutt; Campos, Fernando Camara; Arechiga, Carlos; Longoria, Rogelio Ramírez; Constante, Mariela; Perez, Luis Angel; Pedraza, Juan Pablo; Llamas, Mario; García, Omar.
INFLUENCE OF MINERALOGICAL ORIGIN ON DRI QUALITY: MICROSTRUCTURAL COMPARISON BETWEEN HEMATITE AND MAGNETITE PELLETS,
p. 358-370.
In: 11º Seminário de Aglomeração de Minérios,
São Paulo, Brasil,
2025.
ISSN: 2594-357X, DOI 10.5151/2594-357X-42885
