Calcified roasting-acid leaching process of vanadium from low-grade vanadium-containing stone coal |
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| Authors: | Taiying Wang Longjun Xu Chenlun Liu Zhaodi Zhang |
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| Institution: | 1. State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing, 400044, China
2. College of Chemistry and Chemical Engineering, Chongqing University, Chongqing, 400044, China
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| Abstract: | The low-grade vanadium-containing stone coal used in this experiment was collected from Wuxi Country, Chongqing City, China. The experiment focused on the vanadium recovery from roasted residue through optimizing the process conditions of an effective and environmentally-friendly technology, named calcified roasting-sulfuric acid leaching technology. By single-factor experiments and orthogonal experiments, the effects of roasting temperature, roasting time, sulfuric acid concentration and leaching time on the leaching ratio of vanadium were analyzed. The results showed that the leaching ratio of vanadium reached 85.5% under the proper technological conditions of roasting temperature=950°C, roasting time=4 h, 40% concentration of sulfuric acid and leaching time=6 h. |
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| Keywords: | vanadium-containing stone coal calcified roasting acid leaching vanadium extraction |
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