Abstract: The technology of flotation enhanced by sonoelectrochemical process was used in the desulfuration test on Shanxi Gujiaotun fine coal. With calcium hydroxide as the electrolyte and ethanol as the additive, the effect of ethanol dosage, treatment time, electrolytic current and ultrasonic power on desulfuration rate was investigated. The desulfuration results were compared with those of electrochemically enhanced flotation and ultrasonically enhanced flotation. The results show that, at an ethanol dosage of 30 mL, treatment time of 20 min, electrolytic current of 1.5 A and ultrasonic power of 250 W, this process can achieve a desulfuration rate and clean coal yield of 75.42% and 72.15% respectively , better than those by other two methods.

Key words: Sonoelectrochemistry, Fine coal, Enhanced flotation, Desulfuration rate