A semi-industrial test on scheelite ore has been carried out by using cyclone-static micro-bubble flotation column mainly on the aspects of the capacity and reagents experiments.The test results of continuous 72 hours show that a closed circuit process consisting of one roughing and one cleaning separation by cyclone-static micro-bubble flotation column can obtain 9.76% concentrate grade and 0.10% tailing grade,with little effect on the recovery.