There were calculated energetic performances of free bubbles transition А into attached bubbles М, or transition А→М (TAM) on the support plates with different wettability: limiting hydrophilic (Ф), limiting hydrophobic (Г) and with incomplete wettability (Нх), where x – share of support plate surface, covered by monolayer of collecting agents’ molecules. Calculates of TAM with bubbles by diameter (dе) from 2 mm to 20 nm on Ф-, Г- and Нх-support plates showed that change of specific energy (ΔG/V), enclosed in bubble at TAM, depends on magnitude of dе, wettability of support plate and its contact area with bubbles. According to findings of investigations, high capillary pressing (Рc) in nano-bubbles М is conductive to its instantaneous spreading along support plate, therewith magnitude of Рc substantively decreases. Processes of adhesion and spreading are developed as alone process, irreversibly, unilaterally and quickly, in as much as they are not complicated by oncoming processes. As the equatorial diameter and support plate’s wettability are reduced decreasing of G/V approaches a some millions of J/m3. There were described photo micrograms more large bubbles with luminescent non-polar reagent, eliminating event of wetting hysteresis for illustration of practical simultaneous of process behavior of adhesion and spreading of bubbles. This event on the case of nano-bubbles is easily overcomes by means of Рc high value.

There were calculated redox potentials of metal complexes, refraction values and polarizability factors of the donor – organic ligands. There were specified correlation dependences between transition constants of outer-sphere complexes into innerspheres ones and redox potentials of complexes, taking into account structural and energetic features ligands and metals ions.

There were quoted results of sulphide flotation with regard to ores of Natalka deposit. There was showed a possibility of production from ore contended 2 g/t of Au concentrate with gold content from 40 to 95 g/t at release of it over the range from 30 to 5 %. Precious metal recovery in such a case is 90–35 %. Sorption leaching of received concentrate by virtue CIL method allows recovers from it from 87,1 to 96,4 % of gold that is equivalent to total recovery in the range of 75,2–83,2 %.

There was investigated influence tin, germanium and antimony, as well as animal glue on the current yield (η) and specific energy consumption during zinc electrolysis. There were received adequate regression models of dependences of η and W on cathode current density and animal glue in electrolyte at constant temperature. There were defined ranks of independent variables according with intensity of influence on η value. They are distributed in cluster in the following way (according with decreasing of impact): Ge, Sn, Sb. There was empirically established that antimony in the range of 0,001–0,150 mg/l increases the current efficiency of zinc.

There was investigated influence of alumina powder’s bulk density on the rate of its dissolving in сryolite-alumina melt of the following composition (wt.%): 5,5 CaF2, 1,5 MgF2, 0,3 Al2O3; bath ratio – 2,28. The melt temperature was 950 °C; rate of solution was defined visually and by means of change of alumina concentration in the melt. There was established that the rate of alumina dissolving increased proportional to its bulk density.

On the ground of investigations on zinc cakes treatment using method of sulphatization by oleum with subsequent leaching of sulfated cake by sulfuric acid solution, as well as analysis of literary sources on leaching of lead sulphate from middling products was offered process flow diagram of zinc cakes treatment.

There was by theory and experimentally examined physicochemical process of fluoride treatment of kyanite concentrates under action of additional reagents in the range of temperature from 20 to 550 °C and holding time 0,12–4,5 h. There was discovered optimal conditions of feed stock sintering with ammonium bifluoride, sublimation of ammonium hexafluorsilicate, generation of aluminium fluoride and alumina, as well as silica nano particles synthesis. There were defined thermodynamic and kinetic parameters of chemical reactions. As consequence of carrying out investigations was developed fluoride method of alumina receiving from kyanite concentrates with complex recovery of other useful components.

There was considered evolution of Microroughnesses of an internal surface of copper pipes under drawing. There was employed procedure of measurement such parameter as roughness Ra on internal surface of pipes after extrusion and after drawing. It was revealed that minimum value Ra is observed for hot extruded pipes. At deformation of drawing until logarithmic quotient 0,417 there is increase of average parameter Ra from 0,20 to 6,16 μm, i.e. approximately in 30 times. The greatest rate of Ra increase was noted in the first pass of drawing, as well established increase of dispersion of measured value on drawing passes. The observable phenomenon is explained by means of a turn of copper grains.

There was calculated melting diagram in a typical cross section of Al–Ni–Fe–Mn–Si system in the range to 9 % Ni, 3 % Fe, 2 % Mn, and 3 % Si (wt. %). There were defined concentrations of elements, at which is a possibility of primary crystallization of intermetallic phases Al3Ni, Al9FeNi, Al3Fe, Al6 (Fe, Mn) and Al15 (Fe, Mn) 3Si2. There was showed a good agreement of experimental and computational data. In the field of nickalines composition during die casting the most probable generation of primary crystals of two phases – Al9FeNi and Ai6 (Fe, Mn). Primary crystallization of phases Al5Ni and Al15(Fe, Mn)3Si2 is possible only at elevated concentrations of nickel and silicon, correspondingly, and for formation of phase Al3Fe is required slow crystallization, implemented under temporary molding casting.

The paper describes the experience of designing and development of the line of continuous metallization of long-sized workpieces on the basis of a new principle of their horizontal movement through melt. A steel wire metallization plant has been developed for operation with zinc and aluminum melts. The investigations allow us to automatize its operation; equip it with modern devices for measurement of liquid metal level, temperature, wire speed, etc.; choose pneumatic devices for melt displacement from the furnace; develop the means to prepare the surface to metallization as well as the techniques for extra metal removal from wire.

Fluorine and sulfur distribution in primary aluminum, the atmosphere, and atmosphere precipitation in the region of Bratsk city is considered. HF and SO2 contents in the atmosphere are found to be reduced when the amount of precipitations increases. For the first time, actual fluorine densities in all daily samples of rain and snow precipitations in the zone of the effect of emissions at the Bratsk industrial platform are determined and the indices affecting them (ground air layer temperature, intensity of the atmosphere precipitation) are found. The performances of emission component distribution in the atmosphere precipitation allow us to use them for the ecological estimation of the ambient air and determination of the correlation with the process parameters.

There was made numerical comparison of integration methods for calculation of angular coefficients (ACs) with the aid of integration under different relative position of surfaces. There was offered a simple criterion for assessment of computational error of ACs at first glance, as well as algorithm of a priory choice of method and number of integration nodes before computation of ACs. The algorithm allows substantially decrease time of computation of ACs by means of use of minimum number of nodes for each pair of surface zones. The proposed algorithm is applied for analysis of continuous furnace geometry.

Jubilee of Larissa Vasilyevna Myakisheva.