[en] The object of an article is the extrapolation of the process of classifying material while passing in a model with the separation of the products of milling in the cleaning system includes a separator, concentrator, cyclone and a recycle loop. The model allows for the given parameters to predict the coarseness of grading of the finished product. (paper)

[en] The article presents the dry construction mixtures various components polydisperse flow with light and heavy particles rotating layer mechanics numerical and experimental study results. The obtained results allow to control the polydisperse flow layer rotation while it is mixing in the pneumatic mixer chamber working volume. The conditions for estimating the braking parameter of a rotating layer with polydisperse particles on the basis of which the working mixing chamber necessary dimensions can be effectively selected were analytically obtained. (paper)

[en] The collective magnetization motion in an array of magnetostatically interacting ferromagnetic square elements is studied theoretically and experimentally. Dispersion laws are obtained for collective modes for some particular cases of the distribution of the topological charges π_T of magnetic vortices in particles. Resonance curves are plotted with allowance for dissipation for various values of π_T. An experimental investigation of the ferromagnetic resonance in a two-dimensional array of particles qualitatively supports the calculation results.