Mineral Processing
Radushev A.V., Zubareva G.I., Chekanova L.G., Nasrtdinova T.Yu. 1-2-dyacychydrazines as the collectors at metals ionic flotation
Principal possibility of the usage of symmetric 1, 2-diacylgydrazines of general formula RCONHNHCOR (where R=C2H5-C5H11) as collectors at ionic flotation of Cu(II), Ni(II), Co(II) and Fe(III) (20-40 mg/l) has been shown. The extraction degree of the metals into foam under the optimal conditions of the flotation (pH values for Cu(II) - 6,5-12; Ni(II) - 10,8-11,5; Co(II) - 10,0-12,2; Fe(III) - 6,8-8,0; the ratio [M]:[DAG] = 2:1; flotation time 2-10 min) is more than 99 %. Possible mechanism of the reaction of the metals with 1, 2-diacylgydrazines in water solutions has been discussed.
Extractive Metallurgy of Heavy Nonferrous Metals
Strizhko V.S., Shehirev D.V., Abriutin D.V. The extraction of the ions of some metals by sodium diethylditiocarbamates using kerosene as a solvent
The brief revue of the extraction of diethylditiocarbamates (DDC) of copper and zinc using different solvents was presented in the article. The kinetic of dissolution of DDC copper and zinc in kerosene with/without addition of C7H15OH was investigated (pH of aqueous phase was of 5,0-5,5). The dependence between lg Kd and pH of an aqueous phase for the extraction of DDC copper and zinc using kerosene solvent was discussed (acidity of aqueous phase - 0,8M HCl - pH 8). Sodium DDC has been introduced into aqueous phase in all experiments. The content of metals was analyzed on AAS-1N unit (Karl Zeis, Iena). The next values of dissolution of DDC of copper and zinc were observed for DDC of copper - 2,98 g/100 cm3, for DDC of zinc - 5,07 g/100 cm3 of kerosene. The addition of alcohol's multinuclear improves the indexes of the process of dissolution of DDC of metals in kerosene.
Isabaev S.M., Baktybekov K.S., Chunaeva V.D., Kuzgibekova K.M. The simulation of cobalt sulfoarsenide sulfidizing by the equation of non-linear kinetics
The kinetics of cobalt sulfoarsenide (cobaltine) sulfidizing by the pyrite in neutral atmosphere at the temperature 650-875° C has been investigated. It has been established that the reaction of CoAsS with FeS2 at T=650-875° C leads to the formation of pyrrhotine, cobalt monoarsenide and monosulfide with the extraction into gaseous phase of sulfur, tetrasulfide and elementary arsenic. At the temperature increase the velocity of the reaction of cobalt monoarsenide and monosulfide becomes low, the process is suppressed by the back reaction proceeding. It has been shown that it is expedient for the cobaltine sulfidizing to use generalized Kholmogorov-Erofeev chemical kinetics equation.
Nemchinova N.V., Kletz V.E., Chernyahovskii L.V. Sodium silicates as binder for the briquettes formation at silicon smelting
The problems of the necessity of the usage of briquetting methods at the silicon smelting in ore-thermic furnaces have been considered. The main requirements presented to the binders using in agglomeration and briquetting processes in silicon industry have been given. Theoretical basement of a new method of the mixture lumping has been described. There are in the given paper the data of the laboratory investigations of the optimal parameters of the formation of briquett-like compositions to achieve high mechanical strength and sufficient porosity. The industrial tests have confirmed the advantage of the given method of briquettes formation.
Katkov O.M. Silicon smelting from briquetted mixture in arc furnaces
The advantage of the silicon smelting from briquetted quartz sands and the improvement of smelting technological parameters by the intensification of the process of silica reduction in the thickened mixture from fine materials has been shown. The specifics of briquettes melting has been studied. The necessity of the introduction of loosening additions of wood chips into the mixture to prevent the caking of briquettes light relatively heavy lumpy quartzite providing the mixture descent into the forge has been proved.
Extractive metallurgy of less-common metals
Proshkin V.S., Kolobov G.A. The synthesis of complex coagulants containing titanium from the metallurgical industry waste products
The chemistry of the reaction process of titanium tetrachloride with the water has been considered. Optimal parameters of the production of the solutions containing titanium has been determined: the velocity of titanium tetrachloride feeding into reactor (0,50-0,55 g/s) and titanium concentration in the solution (12-14 %). Optimal relations Me:Ti, where Me is aluminium and/or iron (1:4) and mixture temperature (70-75 ° C) have been determined at the synthesis of complex coagulants containing titanium. Elemental and material composition of complex coagulants containing titanium with aluminium and iron has been presented and the formula showing in general form chemical composition of complex coagulants containing titanium has been suggested (MeCl3.6H2O+Me2O3.3H2O+TiOCl2).
Buchihin E.P., Kuznetsov A.Yu., Chekmaryov A.M., Utkina L.V. The utilization of worked out catalyzers in mixed solvents
The process of platinum containing catalyzer processing in the system HCl-H2O2-DMF has been investigated. The composition of leachable system (HC1 - 4-7 mol/l, H2O2 - 1-4 mol/1, DMF - 0,5-3,0 mol/l) and conditions of platinum isolation out of solution (pH = 3-4, T = 95 ° C) has been determined. The industrial scheme with recirculation of liquid phase has been created. For the diminish of catalyzer base in leaching process the apparatus which realizes the method of multiple short-term contacts has been applied. Using of this apparatus permits to decrease the loss of catalizer base up to 38%.
Extractive metallurgy of precious metals
Petrov G.V., Greiver T.N., Volkov D.V., Vergizova T.V. The investigation of osmium behaviour in chromatic pulps at the chemical type chromites utilization by the caking method
The influence of sorption, saturation and complex forming on interphase distribution of osmium in chromatic pulp was studied with the help of radioisotopic method. It was established that without using complex forming additions osmium is distributed between the precipitate and the solution; introduction of complex former makes it possible to concentrate the overwhelming part of osmium in chrome concentrating solution. It has been proposed to realize precipitation of osmium from gases by their washing in aqueous solution, containing complex formers, with accumulation of osmium and its consequent precipitation from gas cleaning solution by well-known methods.
Metal Forming
Koryagin Yu.D., Kropachev V.S., Krainov V.I. Thermomechanical hardening of casting aluminium АЛ9 alloy
Vaisburd R.A., Partin A.S. The calculation of extrusion defect under the pressing
Model of flow of metal in a final stage of press forming, allowing to determine an initial moment of formation of funnel and by consideration of further deformation to receive the form of funnel has been proposed. The various factors determining beginning of formation of funnel and its form have been analyzed. On the base of experimental data measured on ЧПИ-2 plastometer the strengthening curves for cast and quenched АЛ9 alloy have been built and its plasticity at various deformation temperatures has been estimated. The diagrams of isothermic decomposition of supersaturated solid solution of АЛ9 aluminium alloy underwent to high-temperature mechanical processing have been built. It has been shown that hot plastic deformation accelerates the decomposition of supersaturated solid solution at the cooling up to homogenization temperature leading to the decrease of hardenability. Optimal treatment regimes providing the improvement of silumins properties complex by the combination of plastic deformation and heat treatment have been presented.
Physical Metallurgy and Heat Treatment
Zolotorevskii V.S., Mamzurina O.I. Computer data base on the properties and structure of gold alloys
There has been created the computer data base with the information about properties and structure characteristics of the gold alloys. There is shown that the data base may bee used as source of information and for the receiving of the mathematical models for the dependence of alloys properties via composition.
Belov V.D., Kiryanova V.V., Guseva V.V., Klochkova T.I. The structure and properties of hypoeutectic and eutectic silumins containing beryllium
The influence of beryllium additions on hypoeutectic and eutectic silumins with 0,35% of iron has been investigated. Beryllium additions (0,05%) influence positively on hypoeutectic silumin properties and do not influence on eutectic alloy properties.
Powder Materials and Coatings
Egorychev K.N., Kurbatkina V.V., Kolesnichenko K.V. The interaction in the systems titanium-boron-silicon, titanium-boron-carbon and titanium-carbon-silicon under the mechanical activation of the initial components
The interaction in the systems titanium-boron-silicon, titanium-boron-carbon and titanium-carbon-silicon under the mechanical activation of the initial components in centrifugal planetary mill has been studied by the methods of X-ray phase and differential thermic analysis. The mechanical activation durability was from 0,5 up to 15 min the balls : material ratio was 20:1. There have been the following ratios for the mixtures: for titanium-boron-silicon system - 75 : 15 : 10 for the formation of TiB2 and Ti5Si3, for titanium-boron-carbon system - 74 : 17 : 9 for the formation of TiB2 and TiC, for titanium-carbon-silicon system - 76 : 7 : 17 for the formation of Ti5Si3 and TiC. It has been established that the components of non-activated mixtures of Ti-B-Si and Ti-C-Si compositions do not react with each other up to the temperature of 1000 ° C. The components of the mixture of Ti-B-C composition reacts with each other at the temperature of 740-750 ° C. Under the heating of previously activated mixture with high rate (5° C/s) the temperature of the starting of the interaction of its components was decreased by 300-450 ° C. The heat liberation due to the reaction of the investigated mixture components was sufficient for self-action reaction proceeding in the regime of self-propagating high-temperature synthesis (SHS-process). The most sharp growth of heat liberation and the decrease of the temperature of the starting of the reaction at small (2 min) activation time has been observed for the mixture of Ti-B-Si composition.
Khramtsov V.D., Kosheev O.P. The technology, structure and properties of high-porous cellular heat-resistant materials
The peculiarities of the caking, the microstructure and main properties of high-porous cellular heat-resistant materials produced by combined suspension-electrochemical method have been studied. The dependencies of shrinkage at the caking and microstructure on the relative density and mean cell diameter of high-porous material have been established. It has been shown that scale resistivity of high-porous cellular nihal and chromal of suspension-electrochemical formation surpasses one for high-porous cellular materials from nichrome. Maximal air long exploitation temperature is higher for high-porous cellular nihal and chromal than for nichrome.
Corrosion and metal protection
Khalturina T.I., Boldyreva E.A. Electrochemical technology of the purification of waste water containing copper
Mathematical model of the technological process of electric processing of waste water containing copper has been obtained as a result of the investigations made, the regulating diagrams allowing to fit technical and economical parameters of the purification regimes have been built on the base of this model. The possibility of the decrease of the electric energy expenditures at the usage of asymmetric current for the waste water containing copper rendering harmless has been shown.
Setkov V.Yu., Kopylov A.A., Prishepova N.A., Podushkina N.A. The influence of the quality of anticorrosive protection on the corrosion wear of steel constructions
The regularities of corrosion fracture of steel constructions of the industrial buildings of nonferrous metallurgy plants have been considered. The analytical dependence allowing to predict the development of corrosion wear of steel constructions with the time taking into account the influencing factors has been given. The hypothesis about the influence of the conditions of the anticorrosive operations making on the construction corrosion wear value has been shown and confirmed. The numerical values of the coefficient of the influence of technological and public health parameters of the department microclimate on the quality of anticorrosive protection of the constructions have been established. The classification of the departments and plants of joint stock company “Norilskii combinat” on the conditions of industrial operations has been developed.
Heat Engineering and Environment Protection in Metallurgy
Kurdyumov G.M. Heavy metals and biosphere – about the relativity of the existing considerations
The data of different metals' action on biosphere are analyzed. It is shown that toxic activity is not specific property of heavy metals, because many of them in small quantities are necessary for biological objects. The dependence of heavy metals' toxic properties on their chemical structure is noted.
Process Control and Automation
Gerasimenko T.E., Rutkovskii A.L., Meshkov E.I. The mathematical model of heat-mass exchange during the carbon raw material calcinaition in the rotary furnace
The mathematical model of heat-mass exchange during the carbon raw material calcinaition in the tube rotary furnace has been described in the given article. This model has been made up on the basis of zone method for the heat exchange calculation. The model includes the dependences of the radiative and convective heat exchange, the fuel burning, the volatile substensis extracted from the material and the calcinated material and makes it possible to calculate the process parameters values according to the furnace length. The mathematical model and the programme created for its decision on computers can be used during the research and optimization of the given processes.
