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中文摘要：
本文通过批淋滤实验研究了某电厂2号炉三个静电除尘器下粉煤灰中Cd、Cr、Pb、V的淋滤特性。淋滤液选择pH=4的HCI和pH=10的NaOH溶液，液固比为4：1；批淋滤选取从15分钟到7天的14个时间进行。实验结果显示，在实验条件下，Cr在酸性条件下淋出滤较高，而Pb在碱性条件下淋出滤较高；其中Cr随着淋滤时间的增加，淋出滤有显著增加，且三种粉煤灰中淋出滤大小为LCr3〉LCr2〉LCr1。
英文摘要：
Batch leaching tests have been performed on fly ashes collected from three electrostatic precipitators（ESP） of 2# furnace in a coal-fired power plant in order to study the leaching characteristics of Cd, Cr , Pb, V in fly ashes. Leaching solutions are chosen with HCl solution of initial pH=4 and NaOH solution of pH=10, liquid/solid=4：1, forteen leaching times are chosen, different from 15 minutes to 7 days. The results show that under the experimental conditions, Cr has a relatively high leachability in acid leaching solution, while Pb has a high leachability in alkaline solution. Besides, with the accumulating of leaching time, the leachability of Cr has obviously increased, and the leachability in three coal ashes shows a tendency as follows： LCr3 〉 LCr2 ：〉 LCr1.
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