Research on Molybdenum Extraction from Molybdenum Ammonia Leaching Residue AITranslate
Abstract AITranslate
The phase composition of the molybdenum ammonia leaching residue was analyzed by XRD.The results indicate that there are calcium molybdate and a small amount of low-valence molybdenum compounds in the residue.Thermodynamic research of calcium molybdate leaching with sodium carbonate shows that the leaching reaction spontaneously occurs at the temperature higher than 86℃.The higher the temperature,the easier the leaching reaction.The optimum process parameters of residue leaching with sodium carbonate at high temperature are established as follows：sodium carbonate concentration 70g/L,reaction temperature 190℃,pretreating time 1.5h,liquid-solid ratio 3∶1.Under the optimal leaching conditions,the molybdenum leaching ratio can reach 91.44%,the molybdenum content in the residue decreases to 1.91%,and calcium molybdate is completely leached.Kinetic study of the leaching process shows that the apparent activation energy is 10.38kJ/mol in the leaching reaction of molybdenum ammonia leaching residue with sodium carbonate,and the leaching process is mainly controlled by solid-membrane diffusion.
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DOI：
Chinese Library Classification Number:TF09[冶金工程—冶金物理化学]
Citation Information:
The phase composition of the molybdenum ammonia leaching residue was analyzed by XRD.The results indicate that there are calcium molybdate and a small amount of low-valence molybdenum compounds in the residue.Thermodynamic research of calcium molybdate leaching with sodium carbonate shows that the leaching reaction spontaneously occurs at the temperature higher than 86℃.The higher the temperature,the easier the leaching reaction.The optimum process parameters of residue leaching with sodium carbonate at high temperature are established as follows：sodium carbonate concentration 70g/L,reaction temperature 190℃,pretreating time 1.5h,liquid-solid ratio 3∶1.Under the optimal leaching conditions,the molybdenum leaching ratio can reach 91.44%,the molybdenum content in the residue decreases to 1.91%,and calcium molybdate is completely leached.Kinetic study of the leaching process shows that the apparent activation energy is 10.38kJ/mol in the leaching reaction of molybdenum ammonia leaching residue with sodium carbonate,and the leaching process is mainly controlled by solid-membrane diffusion.
quote
| GB/T 7714-2015 | [1] FAN Xiao-hui, CENG Jin-lin, GAN Min, et al. Research on Molybdenum Extraction from Molybdenum Ammonia Leaching Residue[J]. Rare Metals and Cemented Carbides, 2016(2): 1-5. |
| MLA | [1] FAN Xiao-hui, et al., "Research on Molybdenum Extraction from Molybdenum Ammonia Leaching Residue." Rare Metals and Cemented Carbides, no. 2, 2016, pp. 1-5. |
| APA | [1] FAN Xiao-hui, CENG Jin-lin, GAN Min, ZHANG Lin, QIU Guan-zhou, CHEN Xu-ling, DENG Qiong, WANG Hai-bo, & WANG Song-rong. (2016). Research on Molybdenum Extraction from Molybdenum Ammonia Leaching Residue. Rare Metals and Cemented Carbides(2), 1-5. |
| IEEE | [1] FAN Xiao-hui, CENG Jin-lin, GAN Min, ZHANG Lin, QIU Guan-zhou, CHEN Xu-ling, DENG Qiong, WANG Hai-bo, and WANG Song-rong, "Research on Molybdenum Extraction from Molybdenum Ammonia Leaching Residue," Rare Metals and Cemented Carbides, no. 2, pp. 1-5, 2016. keywords: {molybdenum extraction;molybdenum ammonia leaching residue;sodium carbonate;high temperature;leaching rate;kinetics} |