MECHANICAL WORKINGG OF DISPERSION MATERIALS IN VORTEX-TYPE APPARATUS

There the study objects are the mechanical working processes of dispersion materials, the aerodynamics of wortex motion of heterogenous streams. The mathematical models of forced gas wortex and of theoretical wortex chamber have been developed. The criteria of dynamical and concentration similarity of process have been offered. The mathematical model and the diagram of mechanical working of dispersion materials have been developed. The new vortex-type apparatus for mechanical working, which allow to raise the rate of process and to decrease the power consumption, have been offered. The industrial evaluatiion of jet-vortex apparatus has been realized in the Kristall Scientific-and-Production Union (t. Dzerzhinsk)Available from VNTIC / VNTIC - Scientific & Technical Information Centre of RussiaSIGLERURussian Federatio

Overall stability of compressed compound bars in variable cross section

The article provides the solution to the resistance problem of centrally compressed compound bars of variable section with power-law hardening. The assumed model of S. Timoshenko's theory is valid for calculating and analyzing the general resistance of tower-type bar systems (towers, masts, trestle supports) under certain conditions of stiffening behavior. Unlike the traditional way, the plastic design of lateral shear is made on the basis of independent equilibrium equations. The article describes the condition under which the traditional approach accepted in the technical rod theory and based on the inner forces correlation is valid. Boundary value problem is formulated on the basis of the resolving quadratic equation (traditional approach) and the equation of fourth order (more general, suggested in the paper, adequate definition). For this purpose the technique associated with the increase of the resolving equation's degree is used. In the first case it is possible to examine only symmetric forms of resistance loss. In the second case both symmetric and asymmetric forms of resistance loss are possible to be examined. Transcendental equation of resistance for different cases of bar's fixing is obtained. The coefficients of the given length are analyzed depending upon the ways of fixing the end sections. The article points out that unlike the situation with the bars of solid cross-section it is necessary to take into account the shear strain of the grid in the compound bars of variable stiffness while examining their general buckling resistance

The mechanical characteristics of the high-strength cast irons, melted in different melting units

There is shown the comparison of qualitative figures of ChShG, received by modification in the mode, but melted in different unit

DECISION ON THE RATIONAL ALGORITHM IN TREATMENT OF KIDNEY CYSTS

The article presents an algorithm of diagnostics and treatment of renal cysts and other liquid neoplasms of the retroperitoneal space on an analysis of 270 case histories. The algorithm takes into account the achievements of modern medical technologies developed in the recent years. The application of the proposed algorithm must elevate efficiency of the diagnosis and quality of treatment of patients with renal cysts

DESULFURIZATION OF STEEL IN CONDITIONS OF GUP «LPZ». DEVELOPMENT OF RECOMMENDA¬TIONS ON INCREASE OF ITS EFFICIENCY

The analysis of sulphur removal of steels in the stove-busket is carried out. Besides, statistical processing of quantities of flux metals and ferroalloys, given to the stove-busket at various stages of melting which has confirmed the assumption of economy of ferroalloys due to additional processing deoxidizing mixtures, is carried out

ANALYSIS OF THE HIGH-TEST CAST IRON QUALITY WITH APPLICATION OF METHODS OF MATHEMATICAL STATISTIC

is determined that application of bowl with lid for spheroidizing processing of melt allows to receive high-test cast iron without pyroeffect and smoke emission