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- W4229363445 abstract "Comminution is the stage with the largest energy consumption in the mining process. Therefore, several pre-treatments have been proposed to reduce the energy requirements of this stage. This work analyzed the effect of a heating pre-treatment on the Bond index. A conventional heating pre-treatment was applied to a Chilean copper ore. The ore was heated to temperatures from 300 to 600 °C using a conventional furnace, resulting in a reduction of 19% in the Bond work index. Due to the pre-treatment, the mineral cracked in several areas. Microfracture and composition analyses of these areas confirmed that crack generation in the ore is due to the thermal stress produced by the pre-treatment. The fracture analysis explains the reduction in the Bond work index, since crack generation started at similar temperatures to those at which the reduction in the Bond work index was observed. In addition, the analysis also shows that micro-cracks occur between and through different phases, which may have an impact on mineral liberation. These results also show that, under a moderate high temperature, an important reduction in energy consumption can be obtained." @default.
- W4229363445 created "2022-05-10" @default.
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- W4229363445 date "2022-05-07" @default.
- W4229363445 modified "2023-10-14" @default.
- W4229363445 title "Heating Pre-Treatment of Copper Ores and Its Effects on the Bond Work Index" @default.
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- W4229363445 doi "https://doi.org/10.3390/min12050593" @default.
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