(1. 武汉理工大学 资源与环境工程学院，武汉 430070;
2. 武汉理工大学 矿物资源加工与环境湖北省重点实验室，武汉 430070)
摘 要: 采用循环式电渗析器处理石煤提钒过程中产生的大量高盐度、富含重金属的酸性废水。结果表明：在不同电压条件下，淡水箱中的盐度在脱盐开始时变化显著，随着脱盐的进行，盐度变化逐渐趋于平缓；55 V时的平均脱盐速率为19.84 mg/(L∙s)，约为25V时脱盐速率的3倍；电流随时间都表现出先上升再下降的变化趋势，55 V时的单位能耗为25 V时的2倍。脱盐过程中，阴离子的脱除顺序为Cl−、SO42−。试验中单台循环式电渗析的最大淡水产率为78%，淡水可回收用于工业生产或排放。
关键字: 电渗析；高盐废水；钒；石煤
vanadium extraction from stone coal
（1. School of Resource and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, China;
2. Hubei Key Laboratory of Mineral Resources Processing and Environment, Wuhan University of Technology,
Wuhan 430070, China）
Abstract:The acid wastewater produced in vanadium extraction from stone coal was desalinated by electrolysis. The results show that, at different voltages, the salinities of solutions in diluate tank vary rapidly at the beginning of desalination but slowly with the proceeding of desalination. The average desalination rate is 19.84 mg/(L∙s) at 55 V, which is nearly three times faster than that at 25 V. The trends of current identified by the feature increase at initial stage and decrease sharply later. The specific power consumption at 55 V is two times higher than that at 25 V. The anions are removed in the following order: Cl−, SO42−. The maximum water recovery of one electrodialysis unit can reach 78% and the diluate can be recycled in production or discharged.
Key words: electrodialysis; high-salt wastewater; vanadium; stone coal
