Asphalt fume from Aluminum Industries is one of pollutants, which must be decontaminated in theventilation systems. In this paper, two feasible structures of adsorbers were designed: the venturi-typeadsorber with the small-diameter throat pipe and that with the flow-guiding cone. Then these two kindsof adsorbers were optimized according to the factors which influence the diffusion of the adsorbentparticles.