Lime production in a MAK-90 sintering machine

The production of lime by bed roasting in a MAK-90 sintering machine is considered. The thermal and material balances of the process are analyzed. The thermal system of the sintering machine is modernized so as to permit lime production, with reduction in the power consumption and considerable decrease in dust emission.     

Spatial Distribution of the Amplitudes of Electromagnetic Waves Propagating in a Bounded Multilayer Structure with Periodic Irregularity

The step-by-step method is used for the analysis of propagation of electromagnetic waves in a multilayer structure of a finite length with periodic irregularities of the permittivity, permeability, and conductivity. The distribution of the wave amplitudes in the structure layers is considered and two its main types, sinusoidal and exponential, are revealed. Passbands and stopbands in frequency dependences of reflection and transmission coefficients are found. Parameters of these passbands and stopbands are determined by the combination of the periodicity of irregularities and the finiteness of the structure length. In the case of the tensor permeability, an additional stopband caused by gyrotropic properties of the magnetic medium is found. For the case of a conducting medium, the excess of the normalized amplitude of propagating waves over the unit level is considered and possible factors that cause its appearance are discussed.     

Study on tribological properties of the DV–FV polyarylate system

Tribological properties of two fully compatible polyarylates having similar chemical structures and different kinetic chain flexibilities have been studied. During the processing and forming the polyarylates, a polymer mixture system containing the copolymer has been formed. It is shown that the formation of the DV?FV polymer system by mixing the “flexible” and “rigid” polyarylates leads to a sharp increase in the glass transition temperature and to a more complicated mechanism of friction characterized by a specific structure of the transfer products. It leads to the formation of metal-polymer system on the counterbody surface. This works provides the possibility to control the tribological properties of polymer mixtures.     

The form stability of axisymmetric envelope at torsion

A wave making process on a thin-walled axisymmetric envelope under torsion, arising simultaneously with the loading, is analyzed.     

Filtration through orthotropic media

This paper presents a model of filtration of incompressible fluids through orthotropic media based on flow continuity equations and the Darcy hypothesis about the gradient character of the pressure field in the filtered flows. The model shows that, in the general case, equal pressure surfaces are ellipsoidal. This paper gives formulas to calculate the permeability coefficients from experimental data.