There were conducted tests of processing practice relating to padding of negative charged bar of alkaline battery, with the use of organic solvents, during which were attained level of cadmium’s transfer into solution up to 97 % (by doing so was established high purity of solution, and consequently end product quality) and solvent regeneration level was 98 %. Throughout recovery of cadmium for whole technology was 96–97 %. There were offered options of enhancement. Tests were conducted at test field of enterprise OJSK
«Uralelectromed» (Sverdlovsk region).

On service Karabash copper plant (Chelyabinsk region), that equipped with furnace with Top Submerged Lance (TSL) of company «Ausmelt» (Australia) were discovered some parameters of the smelting process and electric furnace-bay, for which are required optimization, since applied initially regimes didn’t assured maximum efficiency. Foremost it is related to the phase of melt settling after smelting. Owing to specific nature of plant hardware and raw materials composition, there is difficult use experience of other enterprise directly. In this work was made analysis of available experience in given area for the search of ways of efficiency increasing of matte and slag separation, and offered the method of mathematic simulation for process of settling of melt in holding furnace on the base of plant data.

By means of leaching individual pattern oxide of iron, copper, and lead were determined kinetics of transfer of residual elements into melt under leaching of calcined Waelz-oxide of zinc production. Output of residual elements under leaching of pattern iron and copper oxides was limited by induction period of reaction propagation, that is connected with selective adsorption of protons on oxide surface, individual active sites with consequent its diffusion in the volume of oxide phase. At degree of extraction α < 0,5 inherent chemical interactions is the slowest stage, reaction is occurred in kinetic regime.

There was determined kinetics of leaching process for real industrial sample of calcined waelz-oxide of zinc production. There was established mechanism of the main reaction. The process of dissolution of solid phase particles could be arbitrary differentiated on two stages. In the initial point of time the reaction propagates in external diffusion regime on topochemical mechanism. On the second stage of leaching is occurred alteration of process’ mechanism, as evidenced by marginal character of dependence of zinc extraction on time, reason of which is formation on the surface of dissolved particles reaction products, developing badly penetrable films. Limiting stage
in this case is internal diffusion.

There was examined a possibility of activated alumina obtaining with extended specific surface y using of pseudoboehmite. There were conducted tests of given product dissolution in low-melting electrolyte with furthering usage of it’s at electrowinning of aluminum.
For comparison of low-melting and commercial electrolyte were applied different modern physicochemical analysis methods. There was demonstrated that low-melting electrolyte has complete other constitution, and consist not from mix of fluorides as artificial electrolyte, but possessed of ionic constitution. There was demonstrated a possibility of electrochemical obtaining of aluminum at
temperature 780 °C

There were conducted investigations on research of kinetics of nitric acid leaching of multicomponent sulfide middling products with using of mathematical methods. There were received kinetic characteristics of main sulfide materials of studied raw materials, confirming that process speed is simulated by group of kinetic stages.

There was investigated kinetic of processes on graphite anode in oxidative melt on the base of eutectic CsCl–KCl–NaCl with additives TeO2 and NaF at temperature 600 °C. There were researched relationships between limiting current of ions tellurium’s overcharge and limiting current of discharge of oxygen-containing ions and content of TeO2 and NaF. Excess of these currents leads to chlorine evolution in oxychloride melts and freons in oxychloride-fluoride melts. There was offered mechanism of TeO2 dissolution in chloride and chloride-fluoride melts with generation and subsequent dissociation of tellurium oxychloride with forming of O2–, TeCl6 2–, and [TeO2Cl]–. Its availability in electrolyte was confirmed by method of infrared spectroscopy, and explains high rate of discharge of oxygenated ions at the anode.

There were conducted researches and large-scale laboratory testing of melting practice relating to gravity concentrate melting at LLC «Beryozovsky Mine» on lead collector. The source of lead was galenite, containing in concentrate, or in the case of deficiency of the last, revert lead. As source of reducer was used metallic iron. In the optimal conditions as result of melting was obtained alloy with content of gold more than 3 %, in this case gold extraction in alloy was more than 98 %.

There was researched complex of mechanical properties of wire from maraging, austenitic-and austenitic-ferritic steels under plastic deformation and ageing with maximum strength ~2500 MPa, remaining after short-term (a few minutes) heating up to 550 °C for the purpose of investigation of wire behavior from said steels as fibers for composite materials

There was conducted simulation of process of final fixed plug drawing relating to tube from brass L96 with dimensions 8,0×0,2 mm. There were calculated residual stresses distribution on pipes walls with the aid of procedure that used method of «dissection of solids», taking into account condition of «conformity». Insignificance discrepancies of calculations and results of stimulation testified that offered procedure is adequately described process of residual stresses occurrence in tubes walls, and could be applied for the assessment of its level.

By means of methods of scanning electron microscopy, microhardness, X-ray and electron microscope analysis were studied changes of structure, chemical and phase composition for gradient of oldering by silver solder joint «titanium alloy-stainless». There was
demonstrated that owing to interdiffusion of chemical elements, containing in solder (Ag, Cu) and alloy PT3V (Ti, Al, V) is formed diffusion zone with structure of eutectoid type (α + Ti2(Ag, Cu) intermetallide) with microhardness characteristic with close to the basic metal PT3V. On the side of stainless 18Cr10NiTi is formed diffusion zone with following layers: solder layer Ag–Cu, with depleted copper layer, and particles of intermetallide TiAg; layer on the base of intermetallic compound Ti (CuFe); layer on the base of intermetallic compound Ti (FeNi); layer on the base of intermetallic compound Ti (Fe, Cr)2; layer from tertiary compounds Ti5Cr8Fe16 of variable solubility; layer of steel, enriched by chromium, with three phase structure α + γ + σ. Availability of intermetallic compounds in diffusion zone from the side of steel contributed to increasing of microhardness in comparison with the basic metal 18Cr10NiTi.

By means of torsional oscillation was studied temperature dependence of kinematic viscosity of equiatomic alloys Cu–Sn–In–Bi–Pb in the range of 600–1300 °C during heating and cooling regimes. There was detected discrepancy of temperature dependence for kinematic viscosity, corresponding to regimes of heating and cooling, as well as stepwise variation of characteristics of viscous flow (activation energy of viscous flow and entropy factor in Arrhenius equation) during sample heating.