Relationships between particle breakage characteristics and comminution response of fine iron ore concentrates
| Autor: | Arno Kwade, Victor A. Rodriguez, Tulio M. Campos, Ann-Christin Böttcher, Frederico Correa Mayerhofer, Luís Marcelo Tavares, Gilvandro Bueno |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
Mechanical Engineering Metallurgy 02 engineering and technology General Chemistry 010501 environmental sciences engineering.material Geotechnical Engineering and Engineering Geology Pelletizing 01 natural sciences 020501 mining & metallurgy Grinding 0205 materials engineering Iron ore Breakage Control and Systems Engineering engineering Particle Comminution Ball mill Pellet Formation 0105 earth and related environmental sciences |
| Zdroj: | Minerals Engineering. 164:106818 |
| ISSN: | 0892-6875 |
| DOI: | 10.1016/j.mineng.2021.106818 |
| Popis: | Production of iron ore pellets typically requires regrinding of the iron ore concentrates. Although these concentrates are produced following close control of chemical composition, substantial differences may exist in their response to the size reduction operations that are used prior to pellet formation in the pelletizing disc or drum. Establishing relationships between some intrinsic characteristics of these concentrates and their response to size reduction is, therefore, worthwhile. Single-particle breakage testing has long been used to characterize the material intrinsic response to comminution. However, application of traditional breakage tests to iron ore concentrates is not possible, given their fine sizes. The present work analyzes the application of recent single-particle testing methods that are suitable for particles in the –150 µm size range to characterize breakage of four iron ore concentrates from Brazil. The response of particles when assembled in beds is then analyzed in great detail through piston-and-die testing, as well as by comminution tests in a bench-scale ball mill and high-pressure grinding rolls. Relationships between the results in the various devices, which represent the different levels of particle interaction, have been analyzed in light of their energy utilization. Furthermore, implications of differences in particle characteristics on the differences observed in breakage response are also analysed. |
| Databáze: | OpenAIRE |
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