Abstract:Gold-loading powdered activated carbon immersed in the barren liquid cause gold loss and interception in the heap, thus the technique of the activated carbon powder collection is required. Firstly, it was found that the powdered activated carbon was hardly to agglomerate, settled and electrophorese in the barren liquid, and conventional methods are difficult to collect, so a filter material sedimentation coupled with electric field force adsorption should be used. Subsequently, filter materials were selected, and it was found through sedimentation experiments that the deposition rate was positively correlated with surface roughness. A preferred filter material was polypropylene non-woven with apertures size of 20μm, which is 1.5 times the particle size D80. Finally, the frame was reconstructed to an electrode pair to form an electric field thus enhancing the adsorption. It was found that the electrode had the best effect at a field strength of 5 500V/m, with a recovery of 55% and a collection of 108.95 g/m2^. Moreover, the electrical current intensity was not enough to destroy cyanide or cause the deposition of metal onto the electrode metal. This study presents a technique for recovering charged fine particles in high-flux and thin liquids