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The article takes up the processes, occuring at the extention test of metals. The mathematical model of the system «tensile-testing machine hidraulicaly operated- sample—testing mode» is derived. There is shown analytic dependence of absolute and ratio dynamic error of test operations on the parameters of machine, substance and size of the tested sample, testing mode. There are given conclusions and recommendations on reducing of test operations error.

The comparative characteristics of crystallizer mechanisms with electrohydraulic and electromechanical drives are given. The main requirements to the drives used in the system of crystallizer swinging in composition of continuous casting machine are enumerated.

Analysis and complex of measures, carried out in ESPTs-1 with the purpose of improvement of the main technical and economic indexes of blast steel furnace operation is given.

The construction of the arc steel-furnace bay, the application of which allows to increase the speed of flush outflow, to provide reduction of the slag carry-over with metal, is offered.

The calculations of hydrodynamic characteristics of steel in liquid cup of uninterruptedly-casted ingot are examined. The influence of argon blow on the steel circulation in crystallizer is shown.

The structural model of industrial enterprise is presented, for which the differential form of interrelations between characteristics of human capital and characteristics of economical indices is developed.

Тhе peculiarities of step-by-step reconstruction of wire mill 150, being carried out at RUP are examined.

The reduction of time under the current, electric energy rate, electrodes rate at working of arc steel-furnace with new transformer of capacity 95 MBA and with regulating system SIMELT-AC-NEC are noted.

The characteristics of the vacuum degassing process in RH-vacuumator of RUP are experimentally investigated. The profiles of vacuumator pressure, discharge of argon, metal temperatures and others for different melting processes of cord steel assortment are determined.

It is shown that the problem of creation of highly skilled specialists at RUP '‘BM Z'' is being solved due to complex of measures integrated in system approach to progressive development of human resources of the plant. One of such measures is the project ''Gold ten”

The methods of calculation of duration of the metallic bricks heating and melting in liquid bath, taking into account variability of thermal-physical characteristics of metal due to temperature, is developed.

The analysis of carrying out of steel melting using cold-pressed bricks of steel scraps of class Z4, 7B in conditions of RUP ''BMZ” is given in the present work.

The description of the slag model allowing to optimize the process of steel melting in arc steel-furnace is presented. The functional possibilities of dynamic model of slag on changing of the slag composition, phosphorus extraction, magnesium oxide dissolubility, are shown at the example of model calculations.

New method for creation of models of operative control of enterprise is offered. The computer variant of the organizational structure, based on analysis of the charging dynamics of control units, is offered and illustrated at the example of one of organizational structures of Belorussian metallurgical works.

The investigations of energy-power, temperature-high-speed and deformational parameters of rolling of reinforcing profile No 10 using the process of MPR with division into four strings at production of the reinforce rolled metal on the mill 320 PUKP ''BMZ” are carried out.

The peculiarities of construction of thermomechanical hardening of rolled metal of operating line of the m ill 3 20 cooling are considered, their merits and demerits are analyzed.

The analysis of thermodynamic models, which can be used for calculation of phosphorus allocation in the process of melting in steel-making furnace, is presented. It is shown, that temperature of melting process, basic capacity and oxidability of slag mixture in furnace influence to a greatest extent on allocation of phosphorus.

The peculiarities of the temperature changing of the roll along the length of mill at using of new technological schema of production of reinforce rolled metal of small cuts in conditions of RUP are considered.

The new approach to the mathematic modeling and optimization of interrelation of the control units of the metallurgical enterprise organizational structures is offered. The mathematical model of the organizational structure based on temporary characteristics of control units loading is offered at the example of one of the organizational structures BMZ.

The analysis of the mathematical models which can be used at optimization of the control system of the enterprise organizational structure is presented. The new approach to the mathematical modeling of the enterprise organizational structure, based on using of temporary characteristics of the control blocks working, is formulated

The results of numerical simulation of the carbonic powder mixing processes in steel-smelting bowl tub at different frequency regimes of the argon sources activation are presented. The influence of frequency switching regime of sources for the process of the carbonic powder mixing in industrial bowl, that allowed to reveal the additional opportunities, increasing efficiency of the process of the hydrodynamic mixing, is studied.

The main indices of process of the ingots and slugs tilting in circular furnaces are examined and the mathematical model of metal heating which includes calculation of temperatures and thermal stresses in the cut of heated metal with the purpose of estimation of tilting influence on the temperatures and thermotensions dynamics is worked out.

The possibilities of perfection of the processes of the metals continuous casting, including at the reconstruction of operating equipment without considerable capital costs, are shown.

The mathematical model of the mixing and dissolving process of carbonic powder in a system '"vacuumator-bowl” under influence of circulating argon is offered. The spatial distribution of hydrodynamic currents at mixing of carbonic powder, received on the basis of computer calculations is presented. The character of distribution of hydrodynamic speeds of melt (circulating currents) in industrial bowl and vacuumator for different time slots of mixing is determined.

Characteristic of modernization of ASU TP aggregates is given. The general scheme of production and account is given.

The factors, influencing on efficiency of carrying out of vacuum processing of steel at bowl vacuumator VD, are revealed. The deficiencies of the existing technology are determined and recommendations on changing of the technological parameters are worked out.

It is shown that the correct selection of lubricant for wiredrawing allows not only to improve the technological characteristics of wire for the steel wire cord spin but to guarantee the stability of adhesion characteristics of steel wire cord as well.

The perspective ways of development of the steel continuous cast in conditions of RUP “BMZ” are shown.

Computer modeling of the liquid phase length of the ingot moving in MNLZ with predetermined speed on the basis of three-dimensional equation of heat conduction and models, considering changing of carbon concentration in liquid and solid phase at crystallization, is described. There are determined effective lengths of stretch of the liquid phase which can be formed in slug with circular section.

The developments of highly abrasion-resistant material with bulk properties, able to work in condition of intense heat-changing are given. The results of the work are implemented at the mill 320/150 RUP ‘"BMZ”.

The theoretical and practical aspects of logistic function in the process of purchases are examined. The methodical recommendations for determination of the insurable reserve volume are given. The practical efficiency of optimization of the insurable reserve volume is shown.

The computer calculations of alternate distribution of temperatures and stresses in crystallizing round ingot with diameter 300 mm of low-carbon steel 20 are presented. There is determined the character of voltage excursion in secondary cooling zone along the length of ingot of circular section and in different cross-sections. The possibility of occurrence of asymmetry of longitudinal stresses in crosssection of ingot is theoretically shown.

The dynamics of dissolving at stirring by argon of carbonic powders, being produced by different suppliers of BMZ, is determined on the basis of computer modeling. The integral dependencies of the carbon changing in melt and of the carburizers mass on period of stirring for powders of different breakup are calculated. The criterion of dissolution of carbonic powder in steel melt is offered.

The investigation results of dynamics of the crystallizer swinging mechanism of the slugs continuous casting machine, in which hydroelectric drive is applied, are examined.

The main questions of formation and firmness of cindery foam in conditions close to the realized in blast-steel-making-furnace are considered. The nature of factors, stabilizing and breaking the cindery foam, is analyzed.

The possibility of calculation of sectional areas of adsorbed on the surface of complexes in liquid cinders with formula SiO2 — CaO at basic capacity beyond unit is shown. The calculation is carried out in the framework of the method of molecular mechanics of structure and energies of possible silicooxygen anions. The theoretical estimation of supposition about participation of cyclic anion Si3O96- and its fluorsubstituted analogs in decrease of surface tension of melted slags CaO — SiO2 — CaF2 is carried out.

The main factors of the processes of the carbon dissolving in iron melts are analyzed on the basis of different physical-chemical approaches. The calculations of parameters of the dissolving processes of powders of different fractional structure in iron melts are carried out.

The results of computer calculations of the stresses, generated in outside layer of ingot of steel 20 of circular section with diameter 300 mm, in application to one of the industrial technological schemas of RUP “BMZ”, are presented. The segments of compressive and tensile stresses formation along the length of ingot are determined and the principal possibility of production of continuously cast slug of circular section at circular-torch spray cooling is shown.

Modeling of the process of dissolving of powder carbon containing materials of various breakup in melt under effect of argon

Message 1There are given the theoretical bases and methods of solution of the physico-mathematical model of radiation heat transmission in furnaces taking into account the geometry of steel slugs.

Message 2.There are given the methods of calculation of spectral coefficient of furnace medium absorbing taking into account the geometry of steel slugs.

The mathematical model for numerical analysis of' scaling of the ingots, moving with constant speed in the furnaces with graded heating and predetermined quantity of the temperature zones, is offered. The computer calculations of the temperature and scale lay forming at the ingot moving with constant speed in furnaces with five temperature zones are carried out.

The new approach to the description of the nonmetallics elimination process in the process of the out-of -furnace processing using hydrodynamic and physical-chemical models is offered. The possibility of control of the nonmetallics elimination process in the course of processing at the installation *furnace-bowl” is shown.

The technology of conversion of new kinds of hardware with profile of new type, which will allow to increase considerably the mechanical properties of concrete components and to enhance the steel economy, is considered in the article. The technology of conversion of bale hardware rolled metal, that will allow to increase considerably the solidity and to improve operating abilities of the hardware rolled metal, is also considered.In such a way the given results of work together with NIIZhB and BMZ allowed to receive the new technological decisions, the realization of which along with the steel save will increase the reliability of concrete components of buildings and installations.

The mathematical mechanism for modeling of the mixing processes of melts and powder materials, assumed as a basis of the out-of-furnace steel processing, is presented. The computer calculations of the melt speed fields, formed in the industrial bowl of the Belorussian metallurgical works, are given and analyzed.