Bottom flow discharging device of aluminum oxide thickener

The utility model relates to the technical field of red mud washing and settling devices in Bayer process aluminum oxide production, in particular to a machine bottom flow discharging device of an aluminum oxide thickener. The utility model provides an aluminum oxide thickener underflow discharging device which comprises a barrel and a stirring assembly, the stirring assembly is arranged in the barrel, the barrel is provided with a feeding port and a discharging port, the feeding port is connected with the incoming material side of a thickener, the discharging port is formed in the side wall of the barrel, and the stirring assembly is arranged in the barrel. The discharge hole is connected with a discharge guide pipe; the stirring assembly comprises a power shaft and a plurality of paddles, the paddles are arranged on the power shaft at intervals, and the power shaft is arranged in the extending direction of the barrel in a full-length mode and used for driving the paddles to stir materials in the barrel. By