The origin of the dross and the specifications and composition; the particle-size analysis, which is characterized by distribution and the distribution function (q), i.e., dross No. 1 is a granular, medium type; bulk density and metal-content values (the values of 1147 kg/m3 and 43.32%, respectively, for dross No. 1 also characterize granular dross, granular dross have lower density and metal content as compared to compact dross); beside aluminum metal, the content of other metals that are presented in dross composition; the results of the leaching test, conductivity of lixiviate, salt content, and gas evolution, which characterizes the behavior of the dross when coming into contact with water or moisture. The range of variation of these parameters is different between the two dross kinds. Granular dross show higher salt contents and more gas evolution as compared to compact dross.