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• W4313397626 endingPage "123066" @default.
• W4313397626 startingPage "123066" @default.
• W4313397626 abstract "Vanadium is an important rare metal element. In China, a large amount of vanadium resources is stored in shale ore. Muscovite-type vanadium shale is a typical refractory vanadium ore. In production, roasting pretreatment is an effective method to enhance the vanadium extraction efficiency from muscovite-type vanadium shale. In this paper, the mechanism of enhanced vanadium extraction by suspension oxidation roasting pretreatment was investigated. A vanadium leaching rate of 75.24 % was obtained under the conditions: roasting temperature of 900 °C, roasting time of 3 h, the total gas flow of 600 mL/min, and air atmosphere, the roasted product was leached at leaching temperature of 65 °C, leaching time of 4 h, the acid dosage of 10 wt%, a liquid–solid ratio of 2:1. The results of phase transformation indicated that the lattice structure of muscovite was destroyed and released vanadium under the influence of high temperature. V(III) is oxidized to V(V) with acid solubility, during roasting process. The microstructure evolution and pore property analysis results show that the dense layered structure of main vanadium-bearing minerals transformed to loosen porous structure. The loose porous structure promotes the diffusion of gas or H atom into the lattice of muscovite in different processes. Therefore, the suspension oxidation roasting pretreatment could enhance the vanadium extraction from shale ore." @default.
• W4313397626 created "2023-01-06" @default.
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• W4313397626 date "2023-03-01" @default.
• W4313397626 modified "2023-10-06" @default.
• W4313397626 title "Enhanced vanadium extraction from Muscovite-type Vanadium-bearing shale by suspension oxidation roasting pretreatment-acid leaching" @default.
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• W4313397626 doi "https://doi.org/10.1016/j.seppur.2022.123066" @default.
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