Abstract—CaCl
2 was generally used as dephosphorizing agent during the sodiumization-vanadium extraction process. However, a large number of chloride ions were brought into wastewater from vanadium precipitation, which increased the corrosion of the evaporation-concentration equipments of wastewater treatment. Then, the chloride-free dephosphorizing agent (CFDA) was developed, and the dephosphorizing effect was compared with that of CaCl
2. The results showed that, with the chloride-free dephosphorizing agent, the dephosphorizing ratio≥99 %, clarification time of 120 min, vanadium loss≤3.5 %, and vanadate leaching solution dephosphorized by the CFDA could meet the demand of high density vanadium precipitation.
Index Terms—Chloride-free dephosphorizing agent, dephosphorization, vanadate leaching solution, vanadium precipitation.
The authors are with the PanGang Group Research Institute Co., Ltd., Panzhihua 617000, Sichuan, China, they are also in the State Key Laboratory of Vanadium and Titanium Resources Comprehensive Utilization, Panzhihua 617000, Sichuan, China (email: gloomzhang@163.com, rylzky@126.com).
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Cite: Jinglei Zhang, Yanli Ren, Changlin Liu, Jianming Li, and Jinyang Zhang, "Dephosphorization of Vanadate Leaching Solution by Chloride-Free Dephosphorizing Agent," International Journal of Chemical Engineering and Applications vol. 4, no. 6, pp. 406-409, 2013.
