A novel process for denitrification of black aluminum dross has been studied. The effects of the baking temperature, reagent addition ratio, and holding time on the denitrification ratio of aluminum dross were studied. X-ray diffraction (XRD) analysis, scanning electron microscopy (SEM) with energydispersive spectrometry (EDS), x-ray fluorescence (XRF), and nitrogen element analysis were used to evaluate the aluminum dross before and after baking. Aluminum nitride in aluminum dross could be removed effectively by baking a mixture of the aluminum dross with a reagent. A satisfactory denitrification ratio was obtained when applying a baking temperature of 890°C to 920°C, reactant additive dose of 30 wt.% to 40 wt.%, and holding time of 2 h to 3 h, reaching a maximum value of 98.13%. During the baking process, AlN reacted with O 2 in air to form Al 2 O 3 and N 2 , CaCO 3 in carbonates reacted with fluorides and changed into CaF 2 , and Na 2 CO 3 in carbonates reacted with Al 2 O 3 and SiO 2 to form Na 1.95 (Al 1.95 Si 0.05 O 4 ), called zeolite, a compound with cellular structure. This denitrification process is environmentally friendly and could accelerate reutilization of aluminum dross.