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- W2047540247 abstract "Generally, in pelletizing process, the magnetite ore is oxidized to hematite during induration as an exothermic reaction; thereby the magnetite ore requires less energy compared to hematite ore. This form of heat generation inside the pellet is much more efficient than the transferred one from hot gases heated by external burners. This mechanism leads to higher production rates with lower total energy consumption. In order to achieve these improvements, different amounts of anthracite as the solid fuel (0 to 0.95 wt.%) were added to the initial mixture of hematite (60%) and magnetite (40%) ores. The portion of hematite was reduced to magnetite phase by anthracite, and then the produced magnetite re-oxidized again to secondary hematite. Afterwards, the studies of mechanical and reducibility behaviors of pellets were performed by the tumbler/abrasive indexes and the Linder experimental tests. Furthermore, the microstructural evaluation was carried out by scanning electron microscope (SEM). The results demonstrated that by anthracite addition to the mixture, the production rate was significantly increased (more than 30%) while the natural gas consumption was reduced at least 35%. Moreover, based on the strength and reducibility analyses, the anthracite addition up to 0.78% (as an optimal amount) caused considerably to the betterment of fired iron ore pellet properties." @default.
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- W2047540247 date "2015-07-01" @default.
- W2047540247 modified "2023-10-18" @default.
- W2047540247 title "Simultaneous energy saving and production rate improvement in pelletizing process by solid fuel addition" @default.
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- W2047540247 doi "https://doi.org/10.1016/j.minpro.2015.04.023" @default.
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