Fu Zibi, Zheng Shili, Sun Zhaohui. Experimental Research on Leaching Calcification Clinker of Vanadium Slag by Sodium Bicarbonate for Preparation of V2O5[J]. IRON STEEL VANADIUM TITANIUM, 2015, 36(1): 1-6. doi: 10.7513/j.issn.1004-7638.2015.01.001
Citation:
Fu Zibi, Zheng Shili, Sun Zhaohui. Experimental Research on Leaching Calcification Clinker of Vanadium Slag by Sodium Bicarbonate for Preparation of V2O5[J]. IRON STEEL VANADIUM TITANIUM, 2015, 36(1): 1-6. doi: 10.7513/j.issn.1004-7638.2015.01.001
Fu Zibi, Zheng Shili, Sun Zhaohui. Experimental Research on Leaching Calcification Clinker of Vanadium Slag by Sodium Bicarbonate for Preparation of V2O5[J]. IRON STEEL VANADIUM TITANIUM, 2015, 36(1): 1-6. doi: 10.7513/j.issn.1004-7638.2015.01.001
Citation:
Fu Zibi, Zheng Shili, Sun Zhaohui. Experimental Research on Leaching Calcification Clinker of Vanadium Slag by Sodium Bicarbonate for Preparation of V2O5[J]. IRON STEEL VANADIUM TITANIUM, 2015, 36(1): 1-6. doi: 10.7513/j.issn.1004-7638.2015.01.001
1. Pangang Group Research Institute Co., Ltd., State Key Laboratory of Vanadium and Titanium Comprehensive Utilization, Panzhihua 61700, Sichuan, China;
2. National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
The preparation of V2O5 by the processes of sodium bicarbonate （NaHCO3） for leaching and ammonium carbonate （（NH4）2CO3） or ammonium bicarbonate （NH4HCO3） for vanadium precipitation was studied with vanadium slag clinker by calcified roasting as raw materials. The research mainly focused on the effects of leaching temperature,leaching time,leaching agent concentration and liquid-solid ratio on the vanadium leaching rate,and the conditions of leachate purification and vanadium precipitation were also investigated. The results show that more than 92% of leaching rate can be achieved under conditions as follows: leaching temperature 95 ℃,leaching time 120 min,concentration of Na HCO315.8% and liquid-solid ratio 3:1~4:1,and V2O5 which has the purity of 99.87% and satisfies the YB/T 5304-2011 standard can be obtained by adding sodium aluminate in the leachate for silicon removal with wAl/wSi= 0.6~0.8 and precipitating vanadium with （NH4）2CO3 or NH4HCO3.
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