The mechanism of interaction between corrosion-active non-metallic inclusions (CANI) and metal in water media was developed. This mechanism consists in CANI volume increase, as a result of hydration, and tension and compression areas formation. On the basis of this mechanism the model of distribution of mechanical stresses around hydrating inclusions was developed.

The research results were used to create the original purging block for industrial tests on slab caster PJSC “Alchevsky Iron and Steel Works”. Design feature of the purge block is its geometrical form as a ring covering the tundish nozzle. This injection argon through calibrated holes made in special refractory tubes. As a result of tests, that maximum refining effect is achieved at a flow rate of 10 – 12 l/min.

The layout elements of the receiving chamber of the tundish one-way slab continuous casting machine (CCM), equipped with a special metal receiver and the partition, set on the border of the receiving chamber tundish are considered. The article deals with the design elements f the flow distribution steel (PSA). Metal receiver and partition are equipped with overflow openings arranged symmetrically relative to the longitudinal axis of the PC. The Study shows the effect of the new layout and PSA steel and construction of its elements on the parameters of the metal flow in the tundish and removal of nonmetallic inclusions.

The work describes the schemes how plastic metal fl ows for the main stages of precipitation cylindrical workpiece fl at and conical strikers. The location of flows on the line separating two free surfaces of the workpiece at the end – the inner, conical and outer, side part – was set. Flow direction of displacement of the metal, the curvature of trajectories, the transition areas free from contact with the tool and workpiece surface on the end, alternating the rotation of the principal xes of the grid cells, deformation turns and shifts in the region at the end zone are phenomenological features of rainfall harvesting conical and fl at dies.

The intensity of iron evaporation was studied depending on the current strength and time of arc effect on metal in a laboratory furnace. The effective melting temperatures and temperatures of the liquid metal surface in the arc core have been calculated at different evaporation rates. The study includes the estimate calculation of the specific dust formation in a DC arc furnace. The experimental calculated data are related to evaporation of liquid iron, whereas melting process, the composition of metal, the presence of slag make the significant influence on dust formation under the arc effect. These data are consistent with industry values of specific dust formation at accepted assumptions.

Authors studied the problem of obtaining high-quality semi-continuous round ingots of special steels in detail. There are the research data of solidification of round ingots in the graining pan and in the zone of with the development of two-phase zone in the first stage of the process of semi-continuous casting. On the basis of these data research, the search is conducted and conclusions about the modes f refrigeration in the zone of secondary refrigeration are described for obtaining the highest quality ingots with a view to possible further implementation of such mode in practice.

View factors for two real geometries of continuous furnace with cylindrical bars and sectional pusher furnace of ball-rolling workshop are calculated with the help of previously developed method of automatic choosing the number of quadrature nodes. It is shown that the method is several times faster and also more accurate than standard calculation.

The article shows the urgency of research of furnaces productivity of the furnaces, that provide a minimum specific fuel consumption b. Proposed a relatively simple formula to describe the dependence b(τк ) of particular fuel consumption of the final b heating time τк , and estimate the optimal fuel consumption of the final heating time τко (performance). Results on b(τк ) and τко for different specific heat loss heat transfer from the volume qп furnaces and flue gas ways are described. It has been established that the optimum value of the performance is largely determined of heat losses by the heat transfer, which are inversely proportional affect to the value of optimal performance.
The author shows exemplary conditions for minimum specific fuel consumption that can be observed at an extremely high productivity and low productivity of the furnace.

The authors developed the calculation method, which allows to determine the relation between the contact and non-contact areas for the deformation zone on stepwise molding press (FFS). Experimentally tested ratio of straight and curved sections of proximity zones of deformation. Two variants of histograms describe the results of calculation for the double radial circuits and profile with three radiuses blank in the outbreak strain with the permissible amount of reduction.

In order to explore the possibilities of time and cost reduction of developing and perfecting new ore flow parts of pumps was used mathematical modeling of the “Gr” series pump with the software package “FlowVision”. A three-dimensional model of “8 Gr” series pump and the calculations of hydrodynamics working fluid pump base design allowed authors to estimate the zone of elevated flow rates . It was found that the calculated areas are well coincided with areas of high wear , which confirmed the adequacy of the model and allowed to determine the direction of improving the geometry (structure) of the pump.

The design of busbars of the bottom electrode in a DC arc furnace can affect the current carrying melt in the metal , as well as the shape and behavior of electric arcs .The mathematical models are developed to find the magnetic field near the current supply to the bottom electrode of DC arc furnace in the form of spatial and spatial helix spiral of Archimedes. The example of modeling the behavior of axial and radial components of the magnetic field strength in depth and the radius of the molten metal in DC arc furnace is shown. The authors analyzed the influence of the number of turns of current supply to increase the magnetic field and the axial symmetry of the radial component of the magnetic field.

Thermodynamic simulation of iron reduction from liquid slag by carbon was carried out in the context of smelting reduction technologies of iron production. It is shown that iron reduction from liquid slag is thermodynamically possible only in case of the absolute domination of bivalent iron (FeO). This stage is always preceded by reduction of trivalent iron (Fe2O3) dissolved in slag up to bivalent iron. The formation of low-carbon iron drops at 1450 °C is possible with the residual concentration 0.5 – 0.2 % FeO in slag.