High Pressure Leaching of Tungsten and Vanadium with Sodium Carbonate from Spent SCR Denitration Catalyst AITranslate
Abstract AITranslate
Tungsten and vanadium were recovered from spent SCR denitration catalyst by high pressure leaching with Na2CO3.The effects were investigated of roasting pretreatment temperature,type and dosage of the leaching additive,Na_2CO_3 dosage,liquid-solid ratio,leaching time and temperature for tungsten and vanadium leaching.The phases of spent SCR denitration catalyst were analyzed by XRD characterization before and after leaching.The results show that spent SCR denitration catalyst can be leached without roasting pretreatment,and the optimized experimental conditions are as follows:Na_2CO_3addition of 20%,NaOH addition of 8%,liquid-solid ratio of 2∶1,leaching time of 2hand leaching temperature of 230 ℃.Under the above conditions,the leaching rates of tungsten and vanadium reach 75.06% and 89.35%,respectively.In addition,the XRD analysis results show that titanium exists mainly in the form of anatase TiO_2 in spent SCR denitration catalyst,and high-temperature roasting can promote TiO_2 transition from anatase to rutile,inhibiting tungsten and vanadium leaching.Part of tungsten may exist in TiO_2 in the form of solid solution,and therefore the microstructure of TiO_2 should be destroyed by strengthening leaching conditions to further improve the leaching rate of tungsten.
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DOI：
Chinese Library Classification Number:X773[环境科学与工程—环境工程]
Citation Information:
Tungsten and vanadium were recovered from spent SCR denitration catalyst by high pressure leaching with Na2CO3.The effects were investigated of roasting pretreatment temperature,type and dosage of the leaching additive,Na_2CO_3 dosage,liquid-solid ratio,leaching time and temperature for tungsten and vanadium leaching.The phases of spent SCR denitration catalyst were analyzed by XRD characterization before and after leaching.The results show that spent SCR denitration catalyst can be leached without roasting pretreatment,and the optimized experimental conditions are as follows:Na_2CO_3addition of 20%,NaOH addition of 8%,liquid-solid ratio of 2∶1,leaching time of 2hand leaching temperature of 230 ℃.Under the above conditions,the leaching rates of tungsten and vanadium reach 75.06% and 89.35%,respectively.In addition,the XRD analysis results show that titanium exists mainly in the form of anatase TiO_2 in spent SCR denitration catalyst,and high-temperature roasting can promote TiO_2 transition from anatase to rutile,inhibiting tungsten and vanadium leaching.Part of tungsten may exist in TiO_2 in the form of solid solution,and therefore the microstructure of TiO_2 should be destroyed by strengthening leaching conditions to further improve the leaching rate of tungsten.
quote
| GB/T 7714-2015 | [1] LUO Jun, GUAN Wen-juan, ZHANG Gui-qing, et al. High Pressure Leaching of Tungsten and Vanadium with Sodium Carbonate from Spent SCR Denitration Catalyst[J]. Rare Metals and Cemented Carbides, 2015(6): 1-6. |
| MLA | [1] LUO Jun, et al., "High Pressure Leaching of Tungsten and Vanadium with Sodium Carbonate from Spent SCR Denitration Catalyst." Rare Metals and Cemented Carbides, no. 6, 2015, pp. 1-6. |
| APA | [1] LUO Jun, GUAN Wen-juan, ZHANG Gui-qing, LI Zhi-hua, XUE Fei, ZHAO Hong, & HAN Zhang-min. (2015). High Pressure Leaching of Tungsten and Vanadium with Sodium Carbonate from Spent SCR Denitration Catalyst. Rare Metals and Cemented Carbides(6), 1-6. |
| IEEE | [1] LUO Jun, GUAN Wen-juan, ZHANG Gui-qing, LI Zhi-hua, XUE Fei, ZHAO Hong, and HAN Zhang-min, "High Pressure Leaching of Tungsten and Vanadium with Sodium Carbonate from Spent SCR Denitration Catalyst," Rare Metals and Cemented Carbides, no. 6, pp. 1-6, 2015. keywords: {spent SCR denitration catalyst;high pressure leaching with Na2CO3;tungsten recovery;vanadium recovery} |