Applicable to the geological, metallurgical, building materials, chemical industry, mining and scientific research departments for stirring scrubbing, laboratory, separating and cleaning minor samples. Advantages: frequency conversion stepless speed regulation, impeller, the liquid crystal digital display; the adjustment direction. Accurate, reliable operation; it can be equipped with temperature controller, flotation tank pulp temperature time display; FDC type inflatable single trough flotation machine, with the liquid level regulation, charge adjustment, speed digital display device and supplemental watering device.