The problem of dump copper slag processing is one of the actual problems, which solution can be an additional source color and ferrous metals as well as will allow improving the environmental condition in the regions of acting enterprises. The present work studies the chemistry of copper and lead solid-phase reduction reactions from synthesized compounds – ferrites, sulfides, copper and lead ortho-arsenates – with the use of calcium carbide. The properties of materials have been investigated by chemical, X-ray-phase, and physical-chemical methods. The thermodynamic analysis of some chemical reactions has been carried out.

The effect of titanium and molybdenum oxides on the surface tension and the density of the Al2O3–CaO–CaF2 melt has been investigated. The addition of 4–25 mol.% TiO2 and 2,8 mol.% MoO3 to the oxide-fluoride melt at temperatures of 1773–1923 K results to surface tension reduction and density increase. Upon adding titanium and molybdenum, the investigated oxide-fluoride slags show complexing properties; the dimensions and morphology of the structural units are determined.

An analysis of the main technical-and-economic performance measures of one of aluminum works: OK «RUSAL» for a long run has been carried out. Technological advancement allowed raising considerably the efficiency of the electrolysis schematic with Soderberg anode. The prospects for the method development are shown in passing to a «colloidal» anode and the updated electrolysis bath design.

In terms of rare-earth ores of the Tatarsky and Tomtorsky deposits (Krasnoyarsky Territory), the possibility of increasing the extent of investigated sample breaking down by means of discharge-impulse intensification of the grinding process is considered. The use of the combined scheme of ore dressing called «grinding for 20 minutes – discharge-impulse processing with specific energy of 9,2 kJ/dm3» allows increasing the extent of lanthanum and yttrium recovery into the acid solution by 3,8 and 2,8 % respectively during sintering of processed samples with soda.

A technique to determine optimum taper angles of the technological tool in press forming a bimetallic piece part is proposed. The forming stress ensuring the minimum power consumption is taken in the basis of the optimization.

In designing the rectangular section drawing process, it is convenient to use the analytical expressions allowing estimating at once the effect of various process factors. The use of drawing tools with optimum angles makes possible to lower the power consumption, destruction, and unsoundness of piece part. The design procedure for calculation of rectangular section drawing stresses is proposed. Formulas for calculation of drawing stress and definition of optimum angles of the drawing tool channel are derived. The optimum angles are shown to depend on friction and reduction ratio.

The computer simulation of contact stresses in the course of round product drawing through conical draw dies has been carried out by the finite element method with the DEFORM-2D particularized bundled software.

Prospects of the analogy principle application in investigating hafnium binary compounds have been considered. Using the taxon approach, the classification of promising hafnium binary compounds by the main distinctive features of their phase diagrams has been developed. Seven homogeneous groups of compounds are selected. Distinctive features of phase diagrams included in each of these homogeneous groups are determined. The efficiency of two-dimensional metric, the application of which provides the quantitative evaluation of different diagrams proximity and reveals compound-analogs, is substantiated. The results of the classification can be used in justifying the compositions of a number of basic hafnium alloys and foundry al loys.

The conditions for obtaining composite electrochemical coatings (CEC) have been investigated on the basis of nickel with the use of CrB2 nanopowder as a hardening phase in standard nickel-plating electrolyte. It is established that the maximum saturation of the nickel matrix in using chromium nanoboride takes place when its concentration in the electrolyte is 5–10 kg/m3 that is 8–12 times lower than in using micropowders. CEС microhardness of Ni–CrB2(nano) composition with the content of 0,59–0,65 % hardening phase is 1,16–1,19 times higher than that of Ni–CrB2(micro) coatings containing 2,47–2,86 % boride and 1,64–1,86 times higher than that of the nickel matrix. The optimum conditions of CEC deposition are cathodic current density of 1,0 kA/m2, nanoboride concentration of 5–10 kg/m3 in the electrolyte, pH 5,0–5,5, and temperature of 323 K.

Considering the potential risks of the effect of nanoparticles and nanomaterials on the human organism in the production process and the approaches to manage these risks including training programs, risk assessment, and control, it is found that the beginning of adverse consequences for human beings as if they would be excluded in view of the fact that no complete picture of potential hazards has been established. This situation stipulates the need for a particular approach and moves individual behavior aspects of labor safety management to the foreground since the reason of adverse effects for health mostly results from the actions of a human himself – conscious violence of labor safety requirements, negligence, incaution, mindlessness etc. 

An algorithm has been developed and a computer program on its ground for calculation of parameters of nickel sulfide concentrate oxidizing roasting in fluidized bed furnaces has been designed. As a result of implementation of computer planning experiment, an adequate mathematical model of the excess-concentrate coefficient (at constant air blasting) dependence of fluidized bed temperature and specific furnace capacity, excess-blasting coefficient, oxygen concentration in air blasting, recirculated dust content in charge, and concentrate humidity is obtained. High forecasting properties of the model are shown. Under the conditions of the accepted restrictions on independent variables, their ranking by the efficiency on roasting values is performed.

The thermal dynamic model of an electrolytic bath is considered and simulation of some process events has been carried out. The calculations of changes in the process parameters after control action are presented.