Calcining furnace for producing granular calcium aluminate from aluminum ash and use method of calcining furnace

The invention discloses a calcining furnace for producing granular calcium aluminate from aluminum ash and a use method of the calcining furnace, and relates to the technical field of calcining furnaces, the calcining furnace comprises a rotary calcining furnace for producing granular calcium aluminate by calcining aluminum ash, four riding wheels for supporting the rotary calcining furnace, a combustor, a discharge port, a feed bin and a transmission gear, the combustor is arranged on the rotary calcining furnace, the discharge port is arranged below the bottom of the rotary calcining furnace, the rotary calcining furnace is provided with a feed screw and a flue gas collecting device, the flue gas collecting device comprises a high-temperature polymerization settling chamber, and the feed bin is connected with a feed bin airflow homogenizing device. The feeding bin adopts airflow homogenization, so that the qualified rate of finished products is ensured; the composite furnace lining is arranged in the rotary