Gas-filled type impeller

The utility model discloses an inflatable impeller, which comprises an impeller base. A blade is arranged on the impeller base, and a cavity is positioned at the center of the impeller base. The blade is provided with an air channel and an air vent. The cavity at the center of the impeller base is communicated with the air channel of the blade through an air channel of the impeller base, and the air vent is communicated with the air channel of the blade. The inflatable impeller has the advantages that: the impeller, the outside contour line of which is a curve, is designed into large blade, and can lead to feasible stirring intensity under relatively low rotational speed, so that the pulp surface is stable and the selection index of the non-metal minerals is promoted. An air vent, from which the air is thrown out by the rotary impeller, is arranged on the lateral face of the impeller. Moreover, the inflatable impeller of the utility model is characterized in even air dispersion, fine and uniform bubbles, grea