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Journal Perspektivnye Materialy 

 
Influence of deposition condition on semiconductor properties of polyporphyrin films

Yu. A. Filimonova, S. A. Chulovskaya, S. M. Kuzmin, V.I. Parfenyuk

Films based on the zinc complex of 5,10,15,20-tetrakis(4-hydroxyphenyl)porphyrin (ZnT (4-OHPh) P) were obtained by electrochemical deposition from porphyrin aqueous solutions containing 0.1 M NaOH. Using the spectral methods it has been verified that the porphyrin platform undestroyed during the film formation. The stages of film formation were determined by the method of quartz microbalance and cyclic voltammetry: I — a significant deposition of polyporphyrin during the first cycle; II — decreasing of film growth efficiency (several cycles); III — increasing of film efficiency growth and reaching of stationary slope of Δm vs Q dependence. During the first cycle, approximately 3.6 µg/cm2 of polyporphyrine was deposited and the significant change in shape of voltammograms was observed, so the significant role of electrochemical processes at surface of the polyporphyrin deposited during the further film formation should be suggests. The hole conductivity of the films obtained was shown by the Mott-Schottky method. The effect of the deposition condition on the semiconductor properties of materials formed was demonstrated.

Key words: porphyrins, electropolymerization, organic semiconductor materials.

DOI: 10.30791/1028-978X-2019-6-5-12

Filimonova Yuliya — G.A. Krestov Institute of Solution Chemistry of Russian Academy of Science (Akademicheskaya St., 1, Ivanovo, 153045, Russia), graduate student, specialist in material science, electrochemistry of organic compounds.
E-mail: yaf@isc-ras.ru.

Chulovskaya Svetlana — G.A. Krestov Institute of Solution Chemistry of Russian Academy of Science (Akademicheskaya St., 1, Ivanovo, 153045, Russia), PhD (Chem), researcher, specialist in electrochemistry, material science. E-mail: chulovskaya@yandex.ru.

Kuzmin Sergey — G.A. Krestov Institute of Solution Chemistry of Russian Academy of Science (Akademicheskaya St., 1, Ivanovo, 153045, Russia), PhD (Chem), senior research worker, specialist in electrochemistry, material science, macroheterocyclic compounds. E-mail: smk@isc-ras.ru.

Parfenyuk Vladimir — G.A. Krestov Institute of Solution Chemistry of Russian Academy of Science (Akademicheskaya St., 1, Ivanovo, 153045, Russia), Dr Sci (Chem), professor, chief research worker, specialist in electrochemistry, material science, macroheterocyclic compounds. E-mail: vip@isc-ras.ru.

Reference citing

Filimonova Yu. A., Chulovskaya S. A., Kuzmin S. M., Parfenyuk V. I. Vliyanie rezhima osazhdeniya na poluprovodnikovye svojstva porfirinovyh plenok [Influence of deposition condition on semiconductor properties of polyporphyrin films]. Perspektivnye Materialy — Advanced Materials (in Russ), 2019, no. 6, pp. 5 – 12. DOI: 10.30791/1028-978X-2019-6-5-12

Features of β-phase decomposition in a powder
alloy Ti – 22 Nb – 6 Zr

S. N. Yudin, A. V. Kasimtsev, N. Yu. Tabachkova, T. A. Sviridova,
G. V. Markova, S. S. Volodko, I. A. Alimov, A. V. Alpatov, D. D. Titov

In the present work, a compact powder alloy Ti – 22 Nb – 6 Zr was obtained by powder metallurgy methods. The initial alloy powder was synthesized by the calcium-hydride method. It is shown that after consolidation during vacuum sintering and subsequent hot isostatic pressing, the residual porosity of the consolidated material does not exceed 1 %. The physicomechanical properties and structural features of the powder alloy were investigated. It has been established that after hot isostatic pressing in the structure of β-Ti alloy, there are no brittle ω-phase precipitates. In the range of heating temperatures of 550 – 700 K, the β-phase is prone to decomposition with the formation of the α-phase lamellar morphology and a small amount of the ω-phase. The appearance of decay products is accompanied by dilatometric effects and an increase in the Young’s modulus. It was shown that, regardless of the method of powder consolidation, the resulting alloy exhibits elinvarity (a small change in Young’s modulus with increasing temperature) in the temperature range 200 – 500 K. Porosity has been found to be an effective way to change the Young modulus of Ti – 22 Nb – 6 Zr. It was determined that at room temperature, samples with ~ 8 % pores had a Young modulus of about 64 GPa, when the porosity level was reduced to < 1 %, the Young modulus increased to 73.5 GPa.

Keywords: β-titanium alloys, Ti – 22 Nb – 6 Zr, Young’s modulus, phase transformations, microscopy, powder metallurgy, properties.

DOI: 10.30791/1028-978X-2019-6-13-24

 

Yudin Sergey — LTD Metsintez (300041, Russia, Tula, Krasnoarmeysky Prospekt, 25, letter A, room 206), Head of Technological Bureau of, PhD (Eng.), specialist in the field of powder metallurgy. E-mail: Sergey-USN@mail.ru.

Kasimtsev Anatoliy — LTD Metsintez (300041, Russia, Tula, Krasnoarmeysky Prospekt, 25, letter A, room 206), director, doctor of technical science, specialist in the field of powder metallurgy. E-mail: metsintez@yandex.ru.

Tabachkova Nataliya — Moscow Institute of Steel and Alloys (MISIS) (119991, Russia, Moscow, Leninsky Prospekt, 4), PhD (Phys-Math), associate professor of department Materials Science semiconductors and dielectrics, specialist in electron microscopic materials research. E-mail: ntabachkova@gmail.com.

Sviridova Tatiana — Moscow Institute of Steel and Alloys (MISIS) (119991, Russia, Moscow, Leninsky Prospekt, 4), PhD (Phys-Math), researcher of Composite Center, specialist in the field of radiographic methods of research of materials.
E-mail: tim-17@yandex.ru.

Markova Galina — Tula State University (300012, Russia, Tula, Prospekt Lenina, 92), Dr Sci (Eng), head of department Physics of Metals and Materials Science, specialist in the field of phase transition studies. E-mail: ya.gal-markova2012@yandex.ru.

Volodko Sergey — Tula State University (300012, Russia, Tula, Prospekt Lenina, 92), post-graduate student of the department Physics of metals and materials science, specialist in the field of powder metallurgy. E-mail: volodko.sv@yandex.ru.

Alimov Ivan — Tula State University (300012, Russia, Tula, Prospekt Lenina, 92), master of the department Physics of metals and materials science, specialist in the field of powder metallurgy. E-mail: alimov.iwann@mail.ru.

Alpatov Aleksandr — Baikov Institute of Metallurgy and Materials Science RAS (119334, Russia, Moscow, Leninskiy prospekt 49), senior researcher of Material diagnostics laboratory, PhD (Eng.), specialist in the field of gas analysis of materials. E-mail: alpat72@mail.ru.

Titov Dmitriy — Baikov Institute of Metallurgy and Materials Science RAS (119334, Russia, Moscow, Leninskiy prospekt 49), senior researcher of the laboratory of Physical and Chemical Analysis of Ceramic Materials, PhD (Eng.), specialist in the field of obtaining and studying the properties of ceramic and metallic materials. E-mail: mitytitov@gmail.com.

Reference citing

Yudin S. N., Kasimtsev A. V., Tabachkova N. Yu., Sviridova T. A., Markova G. V., Volodko S. S., Alimov I. A., Alpatov A. V., Titov D. D. Osobennosti raspada b-fazy v poroshkovom splave Ti – 22 Nb – 6 Zr [Features of b-phase decomposition in a powder alloy Ti – 22 Nb – 6 Zr]. Perspektivnye Materialy — Advanced Materials (in Russ), 2019, no. 6, pp. 13 – 24. DOI: 10.30791/1028-978X-2019-6-13-24

 
Binder composites for concretes with improved shock resistance

R. S. Fediuk, A. V. Mochalov, D. N. Pezin, Yu. L. Liseitsev

The chemical-technological principles of optimization of mechanical properties and performance characteristics of dispersed-reinforced composite materials are proposed, consisting in the complex effect of the composite binder on the processes of the formation of cement stone. In this case, the effect of increasing the shock endurance increases to 6 times. It was found that dispersed-reinforced concrete with a small number of defects, a high packing density and uniformity, good adhesion between the aggregate and cement stone, an increased ratio of static tensile strength to static compressive strength Rflex/Rcompr, and ductility possess the best resistance to dynamic action. It is proved that this ratio can be increased, in the case of the use of dispersed reinforcement of concrete (so-called fibrous concrete). In experimental studies on penetration of both unreinforced and fiber-reinforced concrete slabs, it was noted that samples of unreinforced concrete were completely destroyed in large and small pieces, while samples of fiber-reinforced concrete were not completely destroyed, and only through penetration at the impact site was observed; that is, fibrous concrete has the best impact resistance. These results can be applied to the design of various special structures, such as defense structures of civil defense and emergency situations, fortifications of the Russian Ministry of Defense, concrete structures of nuclear power plants, etc.

Keywords: binder, cement, rice husk ash, limestone, hyperplasticizer, quartz sand, fiber concrete, shock endurance.

DOI: 10.30791/1028-978X-2019-6-25-35

Fediuk Roman — Training military center at the Far Eastern Federal University (Vladivostok, 690950, 8 Sukhanova ul.), lieutenant colonel, PhD (Eng), associate professor, specialist in the development of composite binders for building materials science. E-mail: roman44@yandex.ru.

Mochalov Alexander — Training military center at the Far Eastern Federal University (Vladivostok, 690950, 8 Sukhanova ul.), colonel, head of the training unit — deputy chief, specialist in the field of dynamic testing of building materials. E-mail: captainvmf@yandex.ru.

Pezin Dmitriy — Training military center at the Far Eastern Federal University (Vladivostok, 690950, 8 Sukhanova ul.), lieutenant colonel, graduate student, specialist in the field of dynamic testing of building materials. E-mail: gera210307@yandex.ru.

 

Liseitsev Yuriy — Training military center at the Far Eastern Federal University (Vladivostok, 690950, 8 Sukhanova ul.), lieutenant colonel, graduate student, specialist in the field of dynamic testing of building materials. E-mail: captainvmf@yandex.ru.

Reference citing

Fediuk R. S., Mochalov A. V., Pezin D. N., Liseitsev Yu. L. Vyazhushchie kompozity dlya betonov povyshennoj udarnoj vynoslivosti [Binder composites for concretes with improved shock resistance]. Perspektivnye Materialy — Advanced Materials (in Russ), 2019, no. 6, pp. 25 – 35. DOI: 10.30791/1028-978X-2019-6-25-35

 
Advanced materials for separation
and purification of gas mixtures
cyclic adsorption processes

N. V. Posternak, Yu. А. Ferapontov, L. L Ferapontova,
E. I. Akulinin, S. I. Dvoretsky

Experimental researches on the production methods of a perspective nanostructured composite adsorbent based on crystalline zeolite NaX with improved physical, mechanical and adsorption characteristics for use in pressure swing adsorption processes have been carried out. It is found that the most promising use of ethylene fluoride derivatives, providing high values of the adhesion of the impregnated adsorbent to the matrix and mechanical strength, is used as a matrix for the manufacture of a block composite adsorbent. The influence of types, the ratio of initial components, the conditions of molding on the mechanical and adsorption characteristics of the composite adsorbent was studied by an experimental method. The choice of composition “adsorbent-filler-polymer matrix” in the synthesis of block composite sorption - active materials is scientifically justified. Analysis of the results of the study of the adsorption characteristics of the control samples of the materials obtained allows us to assert that the polymer matrix film from fluoroplast used as the basis of the block adsorbent does not have continuity, which provides free access to the adsorbate molecules in the adsorbent volume. In the course of the comparative analysis it was found that the dynamic activity of water vapor in the control 20 – 40 % higher than traditional industrial adsorbents such as NaX-B-1G.

 

Keywords: composite sorption-active materials, pressure swing adsorption, gas mixture, separation, polymer matrix, zeolite, strength limit, dynamic activity.

 

DOI: 10.30791/1028-978X-2019-6-36-44

Posternak Nikolay — Open JSC Corporation “Roshimzaschita” (392000, Russia, Tambov, Morshanskoe shosse, 19), head of laboratory, specialist in the field of adsorption separation of gas mixtures. E-mail: mail@roshimzaschita.ru.

Ferapontov Yuri — Open JSC Corporation “Roshimzaschita” (392000, Russia, Tambov, Morshanskoe shosse, 19), head of chemistry and new chemical technologies Department, specialist in processes of chemisorption and adsorption materials. E-mail: mail@roshimzaschita.ru.

Ferapontova Lyudmila — Open JSC Corporation “Roshimzaschita” (392000, Russia, Tambov, Morshanskoe shosse, 19), researcher of the department of chemistry and new chemical technologies, specialist in the field of adsorption materials. E-mail: mail@roshimzaschita.ru.

Akulinin Evgeny — Tambov State Technical University (392000, Russia, Tambov, Sovetskaya ul, 106), associate professor of chair “Technologies and equipment of food and chemical industries”, specialist in the field of adsorption separation of gas mixtures. E-mail: akulinin-2006@yandex.ru.

Dvoretsky Stanislav — Tambov State Technical University (392000, Russia, Tambov, Sovetskaya ul, 106), full professor of chair “Technologies and equipment of food and chemical industries”, specialist in mathematical modeling of adsorption separation of gas mixtures. E-mail: sdvoretsky@mail.tstu.ru.

Reference citing

Posternak N. V., Ferapontov Yu. А., Ferapontova L. L., Akulinin E. I., Dvoretsky S. I. Perspektivnye materialy dlya ciklicheskih adsorbcionnyh processov razdeleniya i ochistki gazovyh smesej [Advanced materials for separation and purification of gas mixtures cyclic adsorption processes]. Perspektivnye Materialy — Advanced Materials (in Russ), 2019, no. 6, pp. 36 – 44. DOI: 10.30791/1028-978X-2019-6-36-44

 
Investigation of Ti – Cu coatings formation
processes under argon-arc surfacing
of siliceous bronze on titanium

A. I. Kovtunov, T. V. Semistenova, A. M. Ostryanko,
A. G. Bochkarev

The technology of automatic argon-arc surfacing of wire from siliceous bronze to titanium products was proposed, which provides for obtaining heat-resistant and wear-resistant coatings based on intermetallic alloys of the titanium-copper system. The investigation of the processes of automatic argon-arc surfacing was carried out using a filler wire based on copper with 3 wt. % silicon, and samples of titanium BT1-0. In the process of surfacing in the investigated range of modes, coatings were obtained on the surface of the samples on the basis of a titanium alloy with copper doped with silicon. The content of copper in this case was from 9 to 40 wt. %. The silicon content was 0.3 – 1.5 wt. %. At the research, the effect of surfacing regimes on the parameters and quality of formation of deposited coatings, as well as on their chemical, phase composition, structure and properties was established. The hardness and resistance to abrasive wear of the obtained samples were studied. The heat resistance of the welded coatings at a temperature of 800 °C for 250 and 500 hours was tested. Dependencies between the chemical composition of the coating formed and its wear resistance and heat resistance were established.

 

Keywords: titanium cooprides, argon-arc surfacing, siliceous bronze, copper, titanium, heat resistance, wear resistance.

DOI: 10.30791/1028-978X-2019-6-45-50

Kovtunov Aleksandr — Togliatti State University (14, Belorusskaya ul, Togliatti, 445020, Russia), Dr Sci (Eng), professor, specialist in the field of metallurgical welding and surfacing processes.

Semistenova Tatiana — Togliatti State University (14, Belorusskaya ul., Togliatti, 445020, Russia), PhD (Eng), associate prof., specialist in the field of surfacing coatings based on intermetallic alloys. E-mail: tatyana_717@mail.ru.

Ostryanko Aleksey — Togliatti State University (14, Belorusskaya ul., Togliatti, 445020, Russia), master’s student, specialist in the field of surfacing coatings based on intermetallic alloys.

Bochkarev Aleksandr — Togliatti State University (14, Belorusskaya ul., Togliatti, 445020, Russia), specialist in the field of surfacing coatings based on titanium aluminides.

Reference citing

Kovtunov A. I., Semistenova T. V., Ostryanko A. M., Bochkarev A. G. Issledovanie processov formirovaniya pokrytij na osnove splavov sistemy titan – med' pri argonodugovoj naplavke kremnistoj bronzy na titan [Investigation of Ti – Cu coatings formation processes under argon-arc surfacing of siliceous bronze on titanium]. Perspektivnye Materialy — Advanced Materials (in Russ), 2019, no. 6, pp. 45 – 50. DOI: 10.30791/1028-978X-2019-6-45-50

 
Synthesis of hard-magnetic material of Fe – Cr – Co system from spherical powder

V. A. Zelenskii, A. B. Ankudinov, I. M. Milyaev, M. I. Alymov

The result of the research, performed in this work, is the proposed rational method of synthesizing a hard-magnetic material from a spherical powder of the 25KhK15YuB (25 Cr – 15 Co – Al – Nb) alloy, obtained by spraying a melt with a stream of gas. It was established experimentally that uniaxial pressing of the powder in the initial state it is not impossible to obtain compacts without defects, despite the use of a detachable matrix and pressing pressure up to 600 MPa. The use of powder, annealing in hydrogen at a temperature of 800 °C, lowers the hardness. However, when compacting, the same separation of compacts is observed as the original powder. The use of a plasticizer gives a positive effect to improve pressing, but lowers the values of magnetic hysteresis characteristics. It is shown that the mechanical activation of spherical powder in a planetary mill allows to obtain high-quality compacts and sintered samples with high values of magnetic characteristics. The changes in the morphology of the powder particles during processing are revealed. There is an enlargement of powders due to cold welding, the shape of particles changes strong compared to the original powder. The scatter of particles in size becomes significantly smaller in comparison with the original spheres, the spacing appears. Using grinding balls of larger diameter leads to better results. The magnetic hysteresis characteristics of hard-magnetic material, synthesized from an alloy powder mechanically activated for 80 minutes, are at a high level that ensures its technical application: Br = 1,18 T; НсВ = 43,1 kA/m; (ВН)max = 31,8 kJ/m3.

Keywords: hard-magnetic materials, magnetic hysteresis characteristics, pressing, sintering, charge mechanical activation, particle shape, microhardness.

DOI: 10.30791/1028-978X-2019-6-51-57

Zelenskii Viktor — Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences (119334, Moscow, Leninsky pr., 49), PhD (Phys.-Math.), leading scientist, specialist in the field of powder metallurgy and technology of synthesis of ultrafine powder. E-mail: zelensky55@bk.ru.

Ankudinov Alexey — Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences (119334, Moscow, Leninsky pr., 49), senior scientist, specialist in the field of materials science and powder metallurgy. E-mail: a-58@bk.ru.

Milyaev Igor — Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences (119334, Moscow, Leninsky pr., 49), DrSci (Eng), principal  scientist, specialist in the field of the physics of magnetic materials. E-mail: imilyaev@mail.ru.

Alymov Mikhail — Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences (119334, Moscow, Leninsky pr., 49), corresponding member of RAS, DrSci (Eng), leading  specialist in the field of materials science and powder metallurgy. E-mail: alymov.mi@gmail.com.

Reference citing

Zelenskii V. A., Ankudinov A. B., Milyaev I. M., Alymov M. I. Sintez magnitotverdogo materiala sistemy Fe – Cr – Co iz sfericheskogo poroshka [Synthesis of hard-magnetic material of Fe – Cr – Co system from spherical powder]. Perspektivnye Materialy — Advanced Materials (in Russ), 2019, no. 6, pp. 51 – 57. DOI: 10.30791/1028-978X-2019-6-51-57

 
Technological characteristics of injection
molding of dynamic elastoplasts based
on thermoplastic polyolefins and butyl rubber

N. T. Kakhramanov, Z. N. Huseynova, V. S. Osipchik,
R. V. Kurbanova

The influence of the butyl rubber concentration and technological mode of injection molding on the main properties of elastoplasts based on butyl rubber and thermoplastic polyolefins – low density polyethylene and polypropylene was considered. Initially, the influence of the butyl rubber concentration on the ultimate tensile stress, tensile stress at yield and elongation at break of the polymer mixtures based on low density polyethylene and polypropylene was investigated. It was found that with the concentration of butyl rubber in the composition based on low density polyethylene equal to 20 wt. % and higher, and in the composition of polypropylene equal to 40 wt. % and higher, the compositions change the deformation mechanism, i.e. the transition of plastic deformation into highly elastic, characteristic of rubbers occurs. The use of dicumyl peroxide and sulfur as cross-linking agents made it possible to obtain dynamically vulcanized elastoplasts with improved physicomechanical and technological properties during the “monotrem” process. The original design of the worm screw on the injection molding machine of the brand DE3132.250C1 makes it possible to carry out on it a “monotrem” technology of obtaining elastoplastic and dynamic vulcanizates on their basis. This technology allows in a single cycle of injection molding simultaneously to realize in the material cylinder the mixing of thermoplastic and elastomeric components in the melt, followed by their vulcanization with dicumyl peroxide or sulfur to form dynamically vulcanized elastoplasts. during the investigation the technology of mechanochemical synthesis of initial polymer mixtures and dynamic elastoplasts, the influence of the temperature regime of injection molding on the cylinder zones, the injection molding pressure, the mold temperature and the injection boost time on their ultimate tensile stress, elongation at break and volume contraction was established. A detailed interpretation of the observed regularities in the change in the properties of composite materials was given.

Keywords: ultimate tensile stress, modification, dynamic elastoplasts, elongation at break.

DOI: 10.30791/1028-978X-2019-6-58-67

Kakhramanov Najaf Tofig oglu — Institute of Polymer Materials of the National Academy of Sciences of Azerbaijan (Azerbaijan, Sumgayit, AZ 5004, S.Vurgun Str, 124), Dr Sci (Chem), professor, head of laboratory, specialist in the field of high-molecular compounds, chemical and mechanochemical modification and processing of polymers, research of nanocomposite materials based on mixture of polymers with mineral fillers. E-mail: najaf1946@rambler.ru.

Huseynova Zulfira Neymat gizi — Institute of Polymer Materials of the National Academy of Sciences of Azerbaijan (Azerbaijan, Sumgayit, AZ 5004, S.Vurgun Str, 124), PhD (Chem), associate professor, leading research associate of laboratory, specialist in the field of polymer modification and studies of the structure and properties of polymer composites.

Osipchik Vladimir — D. Mendeleev University of Chemical Technology of Russia (125047, Moscow, Miusskaya pl. 9), Dr Sci (Chem), professor, head of department, specialist in the field of modification and technology of polymer processing, studying the structure and properties of composites.

Kurbanova Rena Vagif gizi — Institute of Polymer Materials; Azerbaijan State University of Oil and Industry (AZ1010, Baku, Azadlyg, 20), associate professor, specialist in the field of modifying the structure and properties of polymer composite systems, establishing the relationship between the structure of polymers and properties.

Reference citing

Kakhramanov N. T., Huseynova Z. N., Osipchik V. S., Kurbanova R. V. Tekhnologicheskie osobennosti lit'ya pod davleniem dinamicheskih elastoplastov na osnove termoplastichnyh poliolefinov i butilkauchuka [Technological characteristics of injection molding of dynamic elastoplasts based on thermoplastic polyolefins and butyl rubber]. Perspektivnye Materialy — Advanced Materials (in Russ), 2019, no. 6, pp. 58 – 67. DOI: 10.30791/1028-978X-2019-6-58-67

 
Granulated cellulose-based sorption material
for silver extraction from thiocyanate solutions

Ya. B. Kovalskaya, L. D. Ageeva, V. V. Guzeev,
E. A. Zelichenko, O. A. Gurova

The possibility of applying granulated cellulose-based materials as sorbents that extract silver from thiocyanate solutions in industrial technological schemes is proved in the present paper. Samples of materials obtained from unbleached sulfite cellulose of coniferous wood by operations of preliminary activation, dissolution, chemical modification and extrusion followed by consolidation of the formed granules were studied. Investigation results showed that the obtained granules surface had a developed system of pores with 2 – 5 µm diameter. It was established that the optimal duration of silver sorption process from potassium thiocyanate solution using 500 ± 2 mg cellulose-containing sorbent was 120 minutes, while anionic silver complexes were almost completely extracted from thiocyanate solutions containing not more than 1 g/l of silver. The experimentally determined sorption capacity of cellulose material with respect to silver was 20 mg/g.

Keywords: granulated sorption material, sorption capacity, silver, cellulose, thiocyanate solution, X-ray analysis.

DOI: 10.30791/1028-978X-2019-6-68-74

Kovalskaya Yana — National Research Nuclear University “MEPhI” (115409, Moscow, Kashirskoye Shosse 31), junior researcher, specialist in the field of modern energy materials. E-mail: yana-sti@bk.ru.

Ageeva Lyudmila — National Research Nuclear University “MEPhI” (115409, Moscow, Kashirskoye Shosse 31), PhD, associated professor, specialist in the field of sorption and concentrating processes of gold and silver and in the field of X-Ray analysis. E-mail: ald55@mail.ru.

Guzeev Vitaliy — National Research Nuclear University “MEPhI” (115409, Moscow, Kashirskoye Shosse 31), PhD, professor, specialist in the field of chemistry and technology of modern energy materials, ceramic and composite materials. E-mail: guzeev@mail.tomsknet.ru.

Zelichenko Elena — National Research Nuclear University “MEPhI” (115409, Moscow, Kashirskoye shosse 31), PhD, associate professor, specialist in research of formation and analysis of ceramic and polymer composite material properties. E-mail: zelichenko65@mail.ru.

Gurova Oksana — National Research Nuclear University “MEPhI” (115409, Moscow, Kashirskoye Shosse 31), junior researcher, specialist in the field of modern energy materials. E-mail: oksana87@sibmail.com.

Reference citing

Kovalskaya Ya. B., Ageeva L. D., Guzeev V. V., Zelichenko E. A., Gurova O. A.  Granulirovannyj sorbcionnyj material na osnove cellyulozy dlya izvlecheniya serebra iz tiocianatnyh rastvorov [Granulated cellulose-based sorption material for silver extraction from thiocyanate solutions]. Perspektivnye Materialy — Advanced Materials (in Russ), 2019, no. 6, pp. 68 – 74. DOI: 10.30791/1028-978X-2019-6-68-74

Chlorination of alumina obtained in processing
of nepheline concentrate and comparative assessment
of aluminum production full cycle

T. N. Vetchinkin, B. G. Balmaev

The scaled-up tests of the aluminum oxide chlorination under fluidized bed conditions were carried out. The implementation of chlorine technology is possible when using aluminum oxide with high reactivity to chlorine. Such oxide can be obtained according to the modified technology of nepheline processing, by which non-desiliconized aluminate solutions undergo carbonization followed by separation of aluminum hydroxide with sodium hydroaluminosilicate, and calcining it at 600 – 800 °С. The proposed process upgrade, as compared with the existing method, is energy-efficient. Two-stage desiliconization is eliminated, conditions for the low-temperature leaching of the after-sintering mixture are being improved, thus reducing the alumina and alkali secondary loss. The technological parameters of the chlorination of mixture, both in powder and in the pellets form, have been worked off at the integrated installation in fluidized bed conditions. The operational expenditures and capital charges of the aluminum cyclical turnaround according to chlorine technology, as compared with the traditional technology of alumina production by the Bayer method and subsequent electrolysis of cryolite-alumina melts, were evaluated. Comparative cost-benefit analysis showed the advantages of the chlorine method at the aluminum chloride electrolysis stage (up to 30 %), but the existence of additional costs at the production stage of the middlings for chlorination. In the modern context, the chlorine method for producing aluminum has so far development potential as an effective process for super-purity aluminum production of in small workshops rather than as mass technology.

Keywords: nepheline concentrate, alumina, chlorine, chlorination process, fluid bed installation, comparative economic assessment.

DOI: 10.30791/1028-978X-2019-6-75-82

 

Vetchinkina Tatyana — Baikov Institute of Metallurgy and Materials Science of RAS (Moscow, 119334, Leninsky Prospect, 49), PhD (Eng), leading researcher, specialist in the field of physical chemistry and aluminum technology. E-mail: tvetchinkina@yandex.ru.

 

Balmaev Boris — Baikov Institute of Metallurgy and Materials Science of RAS (Moscow, 119334, Leninsky Prospect, 49), PhD, leading researcher, specialist in the field of physical chemistry and aluminum technologies. E-mail: bb-blm@yandex.ru.

Reference citing

Vetchinkin T. N., Balmaev B. G. Hlorirovanie oksida alyuminiya, poluchennogo pri pererabotke nefelinovogo koncentrata i sravnitel'naya ocenka polnogo cikla proizvodstva alyuminiya [Chlorination of alumina obtained in processing of nepheline concentrate and comparative assessment of aluminum production full cycle]. Perspektivnye Materialy — Advanced Materials (in Russ), 2019, no. 6, pp. 75 – 82. DOI: 10.30791/1028-978X-2019-6-75-82