Automatic control device for feeding of alumina

The utility model discloses a more reasonable automatic control device for the feeding of alumina. The automatic control device comprises a chute connected with a stock bin; an electrically operated valve is arranged on the chute; a detecting probe of a hydrogen fluoride online detector is arranged at the discharge port of hydrogen fluoride; and the concentration signals of the hydrogen fluoride online detector controls the valve controller of the electrically operated valve. Through detecting the discharge concentration in real time and controlling the feeding quantity of alumina according to the concentration, the feeding of alumina as required is realized, the excessive breakage of alumina or excessive discharge of alumina is avoided, and the production of aluminum electrolysis is facilitated. The automatic control device is particularly suitable for the popularization and application of aluminum electrolysis enterprises.