Molienda asistida con microondas de un coque metalúrgico

Esteban Ruisánchez; Emilio J. Juárez-Pérez; Ana Arenillas; José M. Bermúdez; José Ángel Menéndez

doi:10.3989/revmetalm.013

Authors

Esteban Ruisánchez Grupo de Microondas y Carbones para Aplicaciones Tecnológicas. Instituto Nacional del Carbón (INCAR), CSIC
Emilio J. Juárez-Pérez Grupo de Microondas y Carbones para Aplicaciones Tecnológicas. Instituto Nacional del Carbón (INCAR), CSIC
Ana Arenillas Grupo de Microondas y Carbones para Aplicaciones Tecnológicas. Instituto Nacional del Carbón (INCAR), CSIC
José M. Bermúdez Grupo de Microondas y Carbones para Aplicaciones Tecnológicas. Instituto Nacional del Carbón (INCAR), CSIC
José Ángel Menéndez Grupo de Microondas y Carbones para Aplicaciones Tecnológicas. Instituto Nacional del Carbón (INCAR), CSIC

DOI:

https://doi.org/10.3989/revmetalm.013

Keywords:

Coke, Energy saving, Grindability, Microwave, Thermal shock

Abstract

Metallurgical cokes are composed of graphitic carbon (s2p2) and different inorganic compounds with very different capacities to absorb microwave radiation. Moreover, due to the electric conductivity shown by the metallurgical cokes, microwave radiation produces electric arcs or microplasmas, which gives rise to hot spots. Therefore, when these cokes are irradiated with microwaves some parts of the particle experiment a rapid heating, while some others do not heat at all. As a result of the different expansion and stress caused by thermal the shock, small cracks and micro-fissures are produced in the particle. The weakening of the coke particles, and therefore an improvement of its grindability, is produced. This paper studies the microwave-assisted grinding of metallurgical coke and evaluates the grinding improvement and energy saving.

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