There were examined the calculation method of Gibbs free energy for half-reaction in the absence of findings on values of free standard energy of formation of its parent substances and resultant products. Through example of galena was showed that use of suggested procedure allows cope with a task of thermodynamic solving for system of PbS–H2O–CO2–(C4H9O)2PSS– and construct respective graph of thermodynamic stability. According to received data was defined a possible composition of sorption layer on the galena surface in the presence of dibutyl dithiophosphate ion and identified its link with the concentration of ion collector and oxidation-reduction potential at prescribed value of pH. There was made comparison of graph with analogous system of PbS–H2O–CO2–C4H9OCSS–

Physicochemical presentations and computerized modelling are promising directions for choice and application of more effective reagents in solving of ores’ rational utilization. In this investigation were presented results of study of sulfhydryl collector with antimony sulphide and assessments of interaction mechanism of these reagents with antimonyl (basic products of antimonite oxidation) with the use of program ChemBio3D of customized complex ChemOffice of corporation «Cambridge Soft» (Great Britain), as well as MOPAC 2012 (US). There was demonstrated possibility of application as assessment criterion of flotation activity of organic compounds with reference to non-ferrous metals’ cations of indices range, which are computer performance of reagents. 

There were examined issues of intensification of heap leaching processes and was defined promising direction of upgrading of given method of gold recovery from gold ores. There was offered use in cycle of degradation high pressure grinding rollers. There was presented description of completed tests on simulation of ore stump in these devices. Results of study demonstrated prospectivity of given method of material breakage – upgrade of gold recovery into solution was more than 5 %.

There was investigated by means of thermogravimetric method kinetics of oxidation of cutting alloy АК7М2 + 0,05%Sr, germanium alloyed, in air at temperature 773, 798 and 823 K. There was identified that additives until 0,05 wt.% Ge will be reduced oxidation rate, as evidenced by increasing of value of apparent activation energy of oxidation process from 14,7 to 79,8 kJ/mol, which with increasing of Ge content until 1,0 wt.% again decreased to 25,2 kJ/mol. The value of actual velocity of oxidation is changed in the range (4,30÷6,00)·10–4 kg/(m2·c) depending on quantity of alloying component. In products of alloys oxidation together with γ-Al2O3 looked up phases SiO2 and GeO2.

By means of continuous weighing method was investigated the kinetics of the interaction of sintered composite on the base of aluminium nitride with the molten potassium cryolite with cryolite ration (CR) 1,3 at temperatures of 700–800 °C. There was specified that at temperature 700 °C composite practically did not exposed to melt impact. Materials interact with molten salt through the stage of its oxidation in the melt of oxygen. At this, takes place besides merging of originally presented in material of oxygen-containing impurities. In the absence of an oxidizer and at concentration of dissolved in cryolite alumina, close to saturation, interaction of sintered aluminium nitride with examined melt did not observed.

There was described technological process of titanium-aluminium tubular coupling pieces from explosive welded stock material with the use of pressing operation. There was demonstrated possibility of stimulation with the aid of software package SIMULIA/Abaqus of the staged of deformation in deep drawing of layered titanium-aluminium composites, allowing to define permissible range of variation of the bending radii of punch and the leading edge of the die.

There was investigated influence of morphology of graded waste chips from brasses L63 on properties of bars and wires obtained by means of chipless shaping. For research particles of chips were divided on 3 types: spiral, flaked and sawing. Any one of them was heated to temperature 450±5 °С and briquetted on the forgemaster. Afterwards briquettes were heated to temperature of 850 °C and extruded by means of direct method with resulting of bars diameters 8 and 6 mm. Herewith elongating ratios were equal to 32 and 56, correspondingly. Pressed bars were subject to drawing, as consequence diameter of wire was equal to 2 and 3 mm. Examination of bars and wire properties showed that waste chips from brasses L 63 could be raw materials during manufacturing of half-prepared products for hot extrusion and subsequent wire drawing. There was established that morphology of chips particles has a little effect on fabrication characteristics of briquettes, as well as on mechanical characteristics of pressed bars and obtained by means of drawing wire, mechanical properties of which meet demands of GOST 1066-90.

There was investigated influence of morphology of graded waste chips from brasses L63 on properties of bars and wires obtained by means of chipless shaping. For research particles of chips were divided on 3 types: spiral, flaked and sawing. Any one of them was heated to temperature 450±5 °С and briquetted on the forgemaster. Afterwards briquettes were heated to temperature of 850 °C and extruded by means of direct method with resulting of bars diameters 8 and 6 mm. Herewith elongating ratios were equal to 32 and 56, correspondingly. Pressed bars were subject to drawing, as consequence diameter of wire was equal to 2 and 3 mm. Examination of bars and wire properties showed that waste chips from brasses L 63 could be raw materials during manufacturing of half-prepared products for hot extrusion and subsequent wire drawing. There was established that morphology of chips particles has a little effect on fabrication characteristics of briquettes, as well as on mechanical characteristics of pressed bars and obtained by means of drawing wire, mechanical properties of which meet demands of GOST 1066-90.

There were developed powder aluminium-phosphorus master alloys for modification of hypereutectic silumins. There was se-lected the best performance processing of powder mixes in the high-energy planetary mill that ensured minimum losses of feed stock and microstructure with uniform and disperse distribution of the proeutectoid constituents’ particles in aluminium matrix. By means of X-ray diffraction study was investigated phase composition of obtained master alloys. There was demonstrated high efficiency of the modification of hypereutectic silumins Al–17wt.%Si by alloying of phosphorus (0,008 wt.%) obtained master alloys.

There were investigated physical and mechanical, as well as tribological properties of TiN–N surface coatings, obtained by means of ion-plasma vacuum-arc deposition. There was established that hardness (Н) grow up from 23 to 54 GPa at content Ni from 0 to 12 at.%, and it is defined by influence of nanopattering of coatings’ nitride constituent. Herewith coefficients НЕ–1 and Н3Е–2, characterized resistance of material to elastic and large deformation of rupture, attain values of 0,104 and 0,567 GPа, correspondingly. Further increment of nickel concentration in coatings until 26 at.% leads to increasing of H to 23–25 GPа, due to influence of increasing quantity of mild plastic metal and forming of marked porosity in coating volume. Friction coefficient of investigated coatings is characterized by value of 0,45, contrast to 0,58 (for TiN coating) and 0,72 (for the base from sintered hard alloy). There was established cohesive mechanism of nanostructured coatings TiN-N’s fracture (СNi = 2,8÷12,0 at.%) and defined critical loads, characterized occurrence of the firs crack (13,5–14,2 N) and in-situ fletting until template (61,9–64,4 N). There was not observed complete flatting of coatings up to stress 90 H, that showed about its high adhesion strength. Developed nanostructured ceramic-metallic coatings are characterized by high heat-resisting quality up to temperature 800 °C. 

There was developed mathematical model of temperature pattern’s distribution in intermediate tank of electronic beam furnace. The model accounts for the power of electron beam, parametric sweep function of beam, parameters of water cooling, phase changes of treated material and convective current of melt from the delivery point to discharge of its into mold cup. There was developed computer software, allowing obtain quantity characteristics, as well as visualize the distribution of current of heat in the intermediate tank’s volume. There were showed examples of modeling of temperature pattern’s distribution, positions of boundary of hard and liquid phase in the intermediate tank under different power of electronic beam.

There was considered process of recovery of selenium dioxide in calcination-selenide technology of selenium obtaining in metallurgical shop of copper plant of Polar division MMC «Norilsk Nickel». There was established that discharge of selenium in the air occurred as fine dispersed condensation aerosols SeO2, which did not recovery by the apparatus of «dry» and «wet» gas cleaning. The content in aerosols of crystalline phases of sodium selenite, copper and nickel is negligible. During researches there were proposed measures on improvement of hollow scrubber operation and substitution of jet-foaming apparatus for foam scrubber. Outfit of scheme of scrubbing by spray-type absorber-condenser, in which will be realized steam condensing enlargement of aerosols of SeO2, will allow more effectively recover aerosols and transform engineering scrubbing into sanitary one.