In this article shows the known constructions of gravitational continuous devices for mixing of bulk materials and the conditional classification of these devices. There is the problem of obtaining mixtures in cases when the volume-weighted amount of one component of the mixture is significantly greater than the second (with the ratio of their mass fractions of 1:10, and more). Typically, in the production for mixtures with a ratio 1:10 are used mixers centrifugal type, which operate in a periodic mode. The problem could be successfully solved using gravitational devices that operate in a continuous mode. The classification represented according to the design of mixers. The levels conventional classification for these mixers: (a) used or no additional mixing elements ; (b) the nature of their physical - mechanical properties.

Keywords: mixer, mixing, construction, mixture, component, bulk material, execution unit for mixing, tray, bunker, gravitation.