Treatment process for drying aluminum oxide by dry method and drying system

The embodiment of the invention relates to the technical field of aluminum oxide production, and particularly relates to a drying system for a treatment process for drying aluminum oxide by a dry method. The drying system comprises a multi-roller rotary dryer, wherein one end of the multi-roller rotary dryer is a feeding end; the feeding end communicates with a combustion chamber; one end, away from the feeding end, of the combustion chamber is equipped with a blast type combustor; the other end of the multi-roller rotary dryer is a discharge end; the outer end of the discharge end communicates with a discharge device; one end, away from the multi-roller rotary dryer, of the discharge device is equipped with a stock bin; one side of the discharge device is equipped with a cyclone dust collector; the outer side of the cyclone dust collector communicates with a gas tank pulse bag type dust collector; and a discharge hole of the cyclone dust collector and a discharge hole of the gas tank pulse bag type dust coll