The removal of fly ash from nonferrous metals industry at high temperatures in electrostatic precipitators (ESPs) has attracted wide attention in reducing the industrial pollution. In this study, the removal characteristics of copper smelting (ash A) and nickel smelting fly ash (ash B) under regular and circulating flue gas conditions were investigated through a high-temperature wire-plate ESP. The two kinds of ash have various resistivity ranges at different temperatures, resulting in better removal of ash B than ash A at relatively low temperatures, whereas the opposite result was obtained at 573 K and 673 K. Besides, under the circulating flue gas condition, the number percentage of large particles was decreased while small particles ascended as the increase of the residence time. After sufficient residence time, the particle mass concentration would reach a stable value under 10 mg/m³. Furthermore, the removal characteristics of the two ash under the barbed electrode (DE2) compared with the round rod electrode (DE1) was also conducted. Results indicated DE2 owned a higher removal efficiency for both ash at high temperature no matter under which condition. Combining the electrode optimization by DE2 and the action of circulating flue gas, the ultimate collection efficiency of ash A and ash B could reach 95.65 % and 95.12 % at 673 K.

静电除尘器（ESP）在高温下去除有色金属工业中的飞灰在减少工业污染方面引起了广泛关注。在这项研究中，通过高温线板电除尘器研究了在常规和循环烟气条件下铜冶炼（灰 A）和镍冶炼飞灰（灰 B）的去除特性。两种灰分在不同温度下具有不同的电阻率范围，在相对较低的温度下比灰分A更好地去除灰分B，而在573 K和673 K获得相反的结果。 此外，在循环烟气条件下，随着停留时间的增加，大颗粒的百分比降低，而小颗粒的百分比增加。经过足够的停留时间，³ . 此外，还进行了倒钩电极（DE2）与圆棒电极（DE1）下两种灰分的去除特性。结果表明，无论在哪种条件下，DE2在高温下对两种灰分都具有较高的去除效率。结合DE2的电极优化和循环烟气的作用，灰A和灰B的最终收集效率在673 K时分别达到95.65%和95.12%。