Applied to the burden and process conditions Cherepovets Metallurgical Combine “Severstal” studied mechanical properties and mineral com- position of the agglomerates in the range of basicity from 1,0 to 3,0.

Тhe fracture behavior of iron ore pellets with double-phase structure which consists of magnetite core and hematite shell had been investigated in this work. The finite element model of two point load tests implemented in the software package SIMULIA Abaqus, are developed for study the load deformation behavior and the fracture of double–phased iron ore pellets. The results of this study showed that the maximum stresses were loaded in the compressed places of the shell. There were carried out two experimental methods to determine the process of cracking inside the pellet under compressive loads. The first method consisted of testing the half of double phased pellet between two horizontal plates that were under the compres- sive load. This tests were provided with making video. The sample was loaded until its failure. In the other case tested the whole pellets which were loaded by the discrete load. After that pellets were cut in halves and then its was investigated with using method of optical microscopy. The results showed that the fracture will be initiated at the shell earlier than at the core of the double–phased pellets, despite the possibility of initiation the first cracks in the magnetite core.

On the basis of the known methods the thermophysical properties of ironore pellets from the concentrates at Sokolovsk- Sarby Ore-Dressing Complex were determined. The dependence of the apparent high heat on temperature. Determined the coefficients of thermal fluxed pellets. Esti- mated values of the coefficients of heat capacity and thermal conductivity coefficients are determined. The data obtained can be used to optimize the design and operating parameters of the conveyor roasting units.

The structure of “cake” defect is a porous metal matrix with numerous inclusions: slag inclusions, coarse clusters of titanium nitrides and carbonitrides and complex composition oxides. Contamination of metal by deoxidation products, oxidation of the metal stream during casting increases the probability of formation of refractory phase in the form of a cluster of titanium nitride particles and the emergence of “cakes”.

The aim work is to study peculiarities of formation and mass transfer out of lance zones during injection desulphurization in ladles using two- nozzles lances. The experiments were performed on a cold transparent model (1:10) of landle. Varied design lance diameter of channel, angle of deviation nozzles, flow and velocity of the gas. Determined parameters out of lance zone penetration depth flow of conditioned mass transfer surface area, motion parameters baths, etc. worked out rational parameters of magnesium injection for more efficient assimilation of its iron.

In work the settlement technique of a choice of rational design data of distributing of basic pipes is stated, influence of use of distributing of longitudinal glissazhny pipes of methodical furnaces on dynamics of disappearance of a dark stain is studied

The reduction of manganese from the waste slag of silicothermal production of metal manganese in the course of its interaction with the melts of iron, high-carbon ferromanganese, and ferrosilicon manganese has been thermodynamically analyzed. The interaction of the melts of iron, high- carbon ferromanganese, and ferrosilicon manganese with the slag of silicothermal production of metal manganese was experimentally studied. It was observed that the manganese reduction from the slag by carbon dissolved in iron occurs appreciably. Therefore, the extraction of manganese can be increased using the waste slag of silicothermal production of metal manganese to alloy iron with manganese upon treatment of metal melt by slag.

Effect of shear deformation ratio upon steel microstructure was studied. Detailed study of microstructure in torsionally loaded specimens re- vealed parameters necessary for the production of various structure types. Effect of shear deformation ratio and cooling methods upon the processes of nucleation and growth of grains in specimens of austenitic steel has been revealed. Deformation parameters necessary for the production of a uniform structure in steel 08Cr18Ni10Ti have been determined. Close interrelation of hardening and softening processes up to the specimen fracture has been established.

The methods of calculating the position of the plane of maximum shear stress under biaxial stress state in a brittle isotropic material, which determines the geometric characteristics resulting from the destruction of the pieces in Roll Crushers. Determined theoretically and experimentally is confirmed that its position depends on the coefficient of friction of a piece of roll, and the angle of capture, as well as the coefficient of friction between the material and the piece crushability cheek.

In the design process multiple drawing a long axially symmetric continuous and composite products at the stage of rough drawing it is advisable to use drawing tools with the channel of two cones, in which input cone ensures a low compression and improved conditions of friction compared with standard drawing tools, and the compression occurs in the second cone of the working part of the channel drawing tool. The formulas for calcu- lating the pressure of drawing axisymmetric drawing products and optimum geometry of the channel drawing tool with the channel of the two cones. It is shown that the drawing tool with the channel of the two cones at the expense of improvement of conditions of friction can reduce pressure of drawing and, accordingly, to provide the best power parameters of the process of drawing, reduce the filament and the defectiveness of a work piece, which is specially important in the process of drawing composite products.

Mathematical models’ equations for calculating of parameters at ring billets upsetting are examined in this paper. Graph-analytic tooling was designed as a result of research. This tooling allows calculating upsetting’s parameters efficiently. Analysis of graphic data linking factors and parameters of this process was carried out and after that recommendations of how to handle these parameters are given.

A method of determining the optimum geometry of the drawing tool that provides the minimum value of the voltage drawing. Method takes into account the presence of the sizing belt dies. For standard fiber offered the optimal extractor.

Crack propagation in thermally reinforced rolled sheet has a number of features and highlighted in the literature sufficiently. Heat-reinforced sheet metal is an example of an inhomogeneous material. In this study simulated the destruction of the pipe under internal pressure of the non-homo- geneous material. Considered special cases of the fracture behavior of heterogeneous material. Some regularities of the destruction of heterogeneous materials, confirming its wave nature. Schemes of reinforcing sheet material to ensure the minimization of the consequences of failure.

In work the general is deduced phenomologic equation of communication of number of the centres of formation of new grains depending on the cores physical and material technology factors.

The dissociation of hematite (Fe2O3 ) in liquid slag was considered in the context of smelting reduction technologies of iron production. Thermodynamic simulation and experimental investigations were carried out for studying the opportunity of hematite dissociation on dissolving in slag. There was shown that only partly hematite dissociation is possible at the temperature of smelting reduction (1400 – 1450 °C). The degree of dis- sociation is increased with growth of the temperature and decrease of general iron content in slag.

Results of researches of carbon materials gasification by СО2 , Н2О and their mixture are presented Speed advantages of steam gasification are set in comparison with carbon-dioxide one. Such result is not concordant with thermodynamics possibilities of process at temperatures higher ~1073 К and can be explained by conformities to law of diffusive interchange of gases and features of adsorption-chemical co-operations during indicated heterogeneous reactions. It is set that speed of Csolid – gasification by mixture of СО2 – Н2О excels the sum of speeds of reactions separately carried out. This nonadditivity of results is determined by additional engaging of СО2 – oxidizing potential in Csolid – gasification through mediation of ap- pearing hydrogen.

The problem of setting the boundary condition for the convection diffusion equation of hydrogen in liquid metal under the complex effect of vacuum, the inert gas purging and subcritical electric field on it is solved by the establishment of Sieverts' law of  the "square root" of hydrogen atoms' degree of ionization in melting in its classic form of notation.

The option of quantification manufacturability analysis of cold rolling of tubes with the specified quality level is offered here. The criteria of accuracy, tubes’ defectiveness, level of the efforts which are made during the rolling and the complex criteria are applied for the analysis. The example of how to use the offered formulas in order to choose the best tool calibration in rolling by specific route is given here. Suggested technique can be used to analyze the several options of technological modes of tubes’ rolling with the specified quality level.