№1 (2019)
Title | MICROSTRUCTURAL PECULIARITIES OF ALUMINIDES OF NICKEL, TITANIUM, AND COBALT |
Authors | Ibraeva G. M., Sukurov B. M., Aubakirova R. K., Kalipekova M. K., Zhunusova S. S. (Almaty) |
Author´s information |
Satbayev University, Institute of Metallurgy and Ore beneficiation, Almaty, Kazakhstan Ibraeva Gulzira Muratbekovna – engineer. https://orcid.org/0000-0002-3005-4021. E-mail: Guizira.83@mail.ru Sukurov Bulat Mendgalievich – Candidate of Technical Sciences, Leading Researcher. https://orcid.org/0000-0003-2363-835X E-mail: bsukurov@gmail.com Aubakirova Rashida Karimovna – Candidate of Technical Sciences, Senior Researcher. E-mail: rashidakarim@rambler.ru Kalipekova Marzhan Amangeldyevna – Associate researcher. E-mail: Marzhan.85@mail.ru Zhunusova Saule Saypuddinovna – engineer. E-mail: saule.zhunusova@mail.ru |
Abstract | Scanning electron microscopy, electron probe microanalysis, X-rays diffractometry, and microhardness measurements were used for studies of diffusion zones in systems Al-Тi, Al-Co, and Al-Ni formed by means of diffusion couples method in a temperature range of 1,300-1,350 °С. It was shown that diffusion zones have the multilayer structure with numerous peculiarities. For a number of intermetallic compounds formed in all three systems there were revealed their temperature shifts using the electron probe microanalysis methods and confirmed with X-rays diffractometry. The correlation between the individual intermetallic layers and their microhardness numbers are not always evident. For some aluminides the microhardness can reach 7,060 ± 1,200 MPa (in globular area of Ti5Al11 and TiAl) and 4,938 MPa (in multilayer area of titanium aluminide TiAl2). For very thin (about 10 μm) layers in multilayer area the microhardness has been measured in the first time 4,000 MPa (TiAl) and 4,450 MPa (Ti3Al). The obtained microhardness numbers demonstrated reasonable coincidence with previous published results. Microhardness in Al-Ni system was measured as 5,200 ± 500 MPa (for β-NiAl) and 5,300 ± 860 MPa (for γ΄-Ni3Al). For cobalt aluminide СоАl from Аl-Со system the microhardness showed numbers 3,900 ± 200 MPa, whereas for СоАl3 it was higher up to 6,600 MPa. The intermetallic compound γ΄-Ni3Al considered as the most interesting from practical point of view had small (up to 10 μm) width whereas the next layer Ni3Al5 had the wider (100 μm) width. There were also revealed some globular Ti5Al11 having thin shells which consist of intermetallic Ti9Al2. |
Key words | intermetallic phases, aluminides, microstructure, scanning electron microscopy, electron probe microanalysis, microhardness |
References |
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Cite this article as: Ibraeva G.M., Sukurov B.M., Aubakirova R.K., Kalipekova M.K., Zhunusova S.S. Microstructural peculiarities of aluminides of nickel, titanium, and cobalt. Kompleksnoe Ispol’zovanie Mineral’nogo Syr’a. 2019. 1. 5-11. https://doi.org/10.31643/2019/6445.01
Title | THE MECHANICAL ACTIVATION AS AN EFFICIENT METHOD FOR THE IMPROVEMENT OF PEROVSKIT TECHNOLOGY |
Authors | Gerasimova l.G., Kuzmich Y.V., Shchukina E.S., Maslova M.V., Kiselev Y.G. (Apatity, Russia) |
Author´s information |
«Tananaev Institute of Chemistry – Subdivision of the Federal Research Centre “Kola Science Centre of the Russian Academy of Sciences”; Science Centre of Russian Academy of Sciences», 184209, Russia, Murmansk region, Apatity, Аcademical city, 26a. Gerasimova Lidia Georgievna – Dr.Sc.(Engineering). (81555)79-100, https://orcid.org/0000-0002-7609-4651. (81555)79-100, E-mail: gerasimova@chemy.kolasc.net.ru. Kuzmich Yuriy Vasilevich – PhD. (Chemystry). (81555)79-451. https://orcid.org/0000-0002-6973-9116 . тел: (81555)79-451. E-mail: kuzmich@chemy.kolasc.net.ru . Shchukina Ekaterina Sergeevna – PhD. (Engineering). https://orcid.org/0000-0002-1018-0012. E-mail: shuki_es@chemy.kolasc.net.ru. Maslova Marina Valentinovna – Dr.Sc.(Engineering). (81555)79-471. https://orcid.org/0000-0001-9738-3797. Тел: (81555)79-471. E-mail: maslova@chemy.kolasc.net.ru. Kiselev Yuriy Genadevich – https://orcid.org/0000-0002-5773-4780. Тел: (81555)79-471. |
Abstract | The effect of high-voltage mechanical energy of planetary mill on a solid hydrated product isolated by the treatment of perovskite with nitric acid has been established. The transformation includes several physicochemical steps such as dispersion of the particles, amorphization of their surface and formation of structural defects. It leads to approximately twofold increases in the specific surface area and porosity of the particles. The best result of mechanical activation was achieved at rotation speed of 650 rpm for 4-5 hours due to high hardness of rutile and anatase contained in hydrated products. The mechanical activation markedly increases the chemical activity of the hydrated product at the step of treatment with sulfuric acid of 700-900 g/l H2SO4. The kinetic curves show the reduction in time of the induction period due to increasing in the dissolution rate of the amorphous layer in the hydrated product particles. Also the extraction of TiO2 into sulfuric acid liquid phase up to 85 % and 76 % respectively, depending on the conditions (in air atmosphere or in an autoclave). At the concentration of 700 g/l H2SO4 a stable liquid system is observed without any sulphate precipitates. Increase in H2SO4 concentration up to 900 g/l markedly accelerates the extraction process. However, increased acidity reduces the stability of the system and promotes formation of TiOSO4•H2O compound in the. The obtained results can be used to improve the nitric-sulfuric acid technology of perovskite |
Key words | perovskite, mechanical activation, hydrated product, titanium dioxide, anatase, rutile |
References |
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Cite this artice as: Герасимова Л.Г. Кузьмич Ю.В., Щукина Е.С., Маслова М.В., Киселев Ю.Г. Механоактивация – эффективный прием для усовершенствования технологии перовскита // Комплексное использование минерального сырья. – 2019. – №1. – С. 12-19. https://doi.org/10.31643/2019/6445.02
Title | ORGANIZATION OF STAGE-BY-STAGE ANCHORING OF MINE WORKINGS |
Authors | Demin V. F., Mussin R. A., Iconopisceva E. O., Khalikova E. R., Burak YU. S. (Karaganda) |
Author´s information |
Karaganda State Technical University (KarGTU), Karaganda, Kazakhstan Demin Vladimir Fedorovich – Doctor of Technical Sciences, Professor of the RMPI Chair, E-mail: vladfdemin@mail.ru Musin Ravil Altavovich – art. Lecturer RMBI, https://orcid.org/0000-0002-1206-6889 E-mail: R.A.Mussin@mail.ru Ikonopisceva Ekaterina Olegovna – student of the department of the RMIP, E-mail: kat10-10@mail.ru Khalikova Elvira Ravilovna – doctoral PhD, RMPI chair, https://orcid.org/0000-0003-1501-8492 , E-mail: salyahova_e@mail.ru Burak Yulia Sergeevna – a student of the RMPI Department, E-mail: uliaburak@mail.ru |
Abstract | The technology of stage-by-stage anchoring of mine workings, conditions to maintain the workings depending on mining and process parameters are investigated. The research allowed developing the effective scheme for applying the anchor workings. The process of lining erection, even at fixing workings with anchors, is from 40 to 70 % of the tunnel cycle, it follows from this that high-performance and expensive tunneling equipment has downtime more than 40 % of its working time. Thus, the technological schemes for carrying out and fixing underground excavations, which are currently used, do not meet to the modern requirements for coal mine equipment using, and to the timing of excavation, and accordingly they do not contribute to increasing labor productivity. The conducted researches made it possible to increase the operating time of the combine and increase the speed of carrying out underground excavation spadework and to strengthen the fastening due to the technology of phased anchorage. The technology of stage-by-stage anchoring allows increasing the pace of underground workings not only by increasing the productivity of tunneling combines, but also by combining the basic technological processes of the tunnel cycle. It is possible to achieve this by dividing the bottomhole zone into two separate zones, in each of which various operations of a sinking cycle are made. That is, while conducting work on cutting and extracting rock mass in one zone, simultaneous work on securing the workings in the other. With the step-by-step anchoring of the mine workings, the rate of sinking is increased by approximately 25 %, compared with the standard technology of tunneling and fixing the mine workings. The daily machine work time of the combine machine increases to 0.2-0.5, and the speed of the workings increases by 20-30 %. |
Key words | anchor, mining, rock massif, mine workings, coal mine, rocks deformation, lining erection, sinking cycle, tunneling |
References |
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Title | CONCENTRATION LIMITS OF NIOBIUM AND CADMIUM ALLOYS EXISTENCE, FORMED BY ULTRAFINE PARTICLES |
Authors | Volodin V. N., Tuleushev Yu. Zh., Nitsenko A. V., Burabaeva N. M. (Almaty) |
Author´s information |
Satbayev University, Institute of Metallurgy and Ore Beneficiation, laboratory of vacuum processes, Almaty, Kazakhstan Volodin Valerij Nikolaevich – Doc. Tech. Sc. (physics and math.), professor, Doc. Sc. (Eng.) on specialty, professor. https://orcid.org/0000-0003-0116-1423, E-mail: Volodinv_n@mail.ru Tuleushev Yurij Zhiankhanovich – Cand. Tech. Sc. (Eng). Institute of Nuclear Physics, Almaty, Kazakhstan https://orcid.org/0000-0002-6555-3891, E-mail: yuriy.tuleushev@inp.kz Nitsenko Alina Vladimirovna – Cand. Tech. Sc. (Eng). https://orcid.org/0000-0001-6753-0936, E-mail: nitc@inbox.ru Burabaeva Nurila Muratovna – Cand. Tech. Sc. (Eng). https://orcid.org/0000-0003-2183-2239, E-mail: Nuri_eng@mail.ru |
Abstract | Cd metals are established to form an alloy with a body-centered cubic structure up to a 64.5 at. % concentration as a result of determining the limits existence of Cadmium in Niobium solid solutions, obtained by plasma-assisted ion sputtering and ultrafine particles co-precipitation to a critical size. At this, two linear dependence sections in the range of 0 – 50.0 at. % and 50.0 – 64.5 at. % of Cadmium (the rest is Niobium) are found described by the equations a [nm] = 8•10-5x +0.3306 and a [nm] = 3•10-4x +0.32188 (respectively), where x is the Cadmium content in the alloy, at. %. At 68 at. % of Cadmium, an unknown phase was identified; no solid solutions of Niobium in the Cadmium were detected. The growth of the lattice parameter is due to the fact, that Cadmium atoms have a larger radius than Niobium atoms: (ra)Cd = 0,1727 нм, (ra)Nb = 0,1625 nm. The kink on the linear dependence of the lattice parameter of the Cadmium in Niobium solid solution as a result of Cadmium concentration in the alloy is explained by the fact that Cadmium first replaces the Niobium atom in the center of the unit cell, then is also embedded in the Niobium lattice with increasing its concentration replacing the Niobium atom in one of the cube vertices. The latter causes a more intense increase in the size of the unit cell. The possibility of the alloys formation in a wide range of concentrations as a result of thermal-fluctuation melting and the merging of very small unlike particles that have significant differences in physical properties, metal particles was confirmed, which is unattainable with the traditional thermal production method. |
Key words | ultrafine particle, Niobium, Cadmium, diffractogram, unit cell, solid solution, alloy. |
References |
3 Sergeev G.B., Shabatina T.I. Low temperature surface chemistry and nanostructures. Surface Science. 2002. 500. 628-655. (in Eng.). 4 Mohammad A. J. Size, shape and temperature dependent surface energy of bi-nary alloy nanoparhticles. Applied Surface Science. 2017. 426. 1094-1099. https://doi.org/10.1016/j.apsusc.2017.07.242 (in Eng.). 5 Roduner E. Size matters: why nanomaterials are different. Chemical Society Reviews. 2006. 35. 583-592. (in Eng.). 6 Roduner E. Razmernye effekty v nanomaterialakh (Dimensional effects in nanomaterials). Moscow. Tekhnosfera. 2010. 350. (in Eng.). 8 Volodin V.N., Tuleushev Yu.Zh., Trebukhov S.A., Nitsenko A.V., Burabayeva N.M. Razmernyy effekt pri formirovanii splava niobiya s kadmiyem ul’tradispersnymi chastitsami pri nizkoy temperature (Dimensional effect in the formation of a niobium alloy with cadmium ultrafine particles at low temperature). Kompleksnoe Ispolʹzovanie Mineralʹnogo syrʹâ. 2018. 4. 98–104. (in Russ.). https://doi.org/10.31643/2018/6445.35 9 Volodin V.N., Bayanzhanova Sh.T., Khrapunov V.E., Terlikbayev M.A., Vasilets S.G. Zavodskiye ispytaniya vakuumdistillyatsionnogo rafinirovaniya kadmiya s vysokim soderzhaniyem primesey (Factory tests of cadmium vacuum-distillation refining with a high content of impurities). Kompleksnoye ispol’zovaniye mineral’nogo Syr’ya. 2005. 6. 21-27. (in Russ.). |
Title | URANIUM MINERAL-RESOURCES: THE CURRENT STATE AND PERSPECTIVES FOR DEVELOPMENT. REVIEW |
Authors | Balikhin A. V. (Moscow, Russia) |
Author´s information |
Balikhin Andrey Vladimirovich – Russian Institute for Scientific and Technical Information of Russian Academy of Sciences, Moscow, Russia, e-mail: metall@viniti.ru |
Abstract | The article covers current state, prospects of development, priority directions of reproduction and expansion of the uranium mineral resource base of the Russian nuclear industry. The state of the uranium mining industry in Russia and for individual uranium mining enterprises as Priargun Production Mining and Chemical Corporation PJSC, Hiagda JSC and Dalur JSC is characterized. The main plans for the development of uranium mining enterprises and existing problems are reflected. Within the framework of the problem, promising provinces, regions and specific exploration objects are presented, which require forecast-thematic, prognostic-mineragenic and prospecting works. According to the basic scenario of the development of the world nuclear power industry, uranium mining by 2030 should increase by 1,5 times. Production at operating mines will decline, and the planned new mines will only be able to compensate for the outgoing capacity. It is planned an additional 30 thousand tons of uranium per year will be extracted at new promising mines. Despite the depressive uranium market, uranium mining in 2016 reached 62 thousand tons – a historic maximum since 1988. The total uranium resource is more than sufficient to ensure the long-term needs of nuclear industry. In-situ underground leaching becomes main method of uranium extraction since 2010. Rosatom has acquired a Canadian public company Uranium One in 2010 in order to secure long-term uranium supply for Russian nuclear fuel cycle chain. Rosatom has consolidated on its basis high-performance uranium assets in Kazakhstan and in other countries. Uranium One has increased annual production almost 5 times during the last 8 years and became a fourth global U producer. |
Key words | uranium, mineral resources base, deposit, mining, atomic power engineering, uranium-mining industry, in-situ underground leaching, mine, uranium, market, price, nuclear reactor, geological exploration. |
References |
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Title | THE DEVELOPMENT OF THE THERMAL SCHEMES JOINT PROCESSING OF SULPHIDE OF LEAD CONCENTRATES, AND WASTE SLAGS BY THE METHOD OF EXTREME POWER SAVING |
Authors | Dihanbaev B. I., Dikhanbaev A. B. (Almaty, Astana) |
Author´s information |
Kazakh Agrotechnical University named after S.Seifullin, Astana, Kazakhstan, Dikhanbaev Bayandy – Doctor of Technical Sciences, Acting Associate Professor of the Department “Thermal Power Engineering”, e-mail otrar_kz@mail.ru Almata University of Energy and Communications, Almaty, Kazakhstan Dihanbaev Arystan Bayandyevich – PhD student of the department “Thermal Power Engineering”, e-mail arystan.d74@gmail.com |
Abstract | Along the advantages, modern processes of direct smelting of lead raw materials have a number of disadvantages: heat and material losses with fuming slag; low quality sulfuric acid production; a twofold increase in the specific fuel consumption in the production of metals from refractory zinc, iron-containing wastes, compared to their extraction from “rich” raw materials. The aim of the work is to develop an energy-saving thermal scheme of waste-free processing of lead sulphide concentrates together with waste zinc-containing slag, which will be several times lower in specific fuel consumption than on existing analogues.The methodology of extreme energy saving (MEES) has been adopted as a scientifically justified search method. Following the basic principles of the MEES, experiments were successively carried out: (1) on determine a time of melt mixing in the gas-liquid model of the smelting reactor, (2) on sublimate zinc, germanium and reduce iron from liquid slag of the Chymkent lead plant (ChLP), excavated slag of Ust- Kamenogorsk lead-zinc plant and ChLP on a pilot plant with a capacity of 1.5 t / h. The results of experimental studies were processed by the methods of planning experiments and affine modeling. As a result of the search, a new method for treating the melt, the “smelt layer with inversion phase”, was found, on its base an aggregate “reactor inversion phase — rotary kiln” was created. It is shown that slag recycling at the pilot plant is 3-4 times higher in specific productivity, and 2-3 times lower in specific fuel consumption than in operating waelz-kiln. Technology of waste-free processing of lead sulfide concentrate together with waste slag has been developed; on the basis of the created unit and technology, the thermal scheme of the new system for the production of primary lead has been formed. Calculations of the thermal scheme show that in the new system the specific fuel consumption will decrease by 3.5-4 times in comparison to the process “oxidative agglomeration roasting – reduction shaft smelting – fuming”. |
Key words | sulphide lead concentrate, reactor inversion phase – rotary kiln, cupreous cast iron, zinc-germanium containing sublimates, artificial gas, energy saving |
References |
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Title | EFFICIENT DRY CONSTRUCTION MIXTURES WITH PERSPECTIVE MODIFICATION ADDITIVES BASED ON DOMESTIC RAW MATERIALS |
Authors | Baiserikova D. E., Kuatbaeva T. K., Uskenbayeva A. M. (Almaty) |
Author´s information |
Satbayev University, (Kazakh National Technical Research University), Almaty, Kazakhstan Bayserikova Dana Ergalikyzy – master degree. https://orcid.org/0000-0002-8395-9203 E-mail: baiserikova.dana@gmail.com Kuatbaeva Tokzhan Kuangalievna – Doctor of Technical Sciences, Leading Researcher. E-mail: aitzhanova.tokzhan@mail.ru Uskenbayeva Alma Muratbekovna – PhD, https://orcid.org/0000-0002-0540-5651 E-mail: almauskenbaeva@mail.ru Satbayev University, Institute of Metallurgy and Ore Benefication, Almaty, Kazakhstan |
Abstract | The article presents research on the development of effective dry building mixes with modifying additives based on domestic raw materials. The prospects of using local raw materials such as Ust-Kamenogorsk Portland cement, Novoalekseevsky sand (Almaty region), neutralized electrothermophosphoric slag of domestic production, wollastonite (Akmola region field) are shown. Wollastonite acted as a reinforcing ingredient that enhances the crack resistance of cement stone molded products. At the same time, the experiments carried out confirmed that hardening accelerators have a positive effect on the structure of cement stone at all levels: they increase the volume of micropores and reduce the volume of macropores with a slight change in total porosity. Studies have shown that the use of modifying additives from domestic raw materials can improve the technological properties of mixtures, namely, adhesion to mineral bases, high wear resistance and abrasion resistance, low shrinkage and sufficient elasticity. |
Key words | Dry mortars, modifying admixes, metakaolin, electrothermophosphoric slag, wollastonite |
References |
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Title | ELECTROCHEMICAL PROCESSING OF TIN-CONTAINING SOLDERS WITH THE USE OF ELECTROLYTE BASED ON POTASSIUM HYDROXIDE |
Authors |
Akbarov M. S. (Almaty), Chernyshova O. V. (Moscjv, Russia), Ussoltseva G. A. (Almaty), А. Akchil (Isparta, Turkey) |
Author´s information |
Satbayev University, (“Kazakh National Research Technical University named after K.I. Satpaev”, the department”) Metallurgical processes, heat engineering and technology of special materials”, Almaty, Kazakhstan Akbarov Merey Sabituly – assistant. https://orcid.org/0000-0002-4272-8038 E-mail: akbarov_meron@mail.ru Chernyshova Oksana Vitalevna – Candidate of Technical Sciences, docent. https://orcid.org/0000-0003-0543-7474 E-mail: Oksana.11.09.1967@mail.ru Russian Technological University, Moscow, Russia Ussoltseva Galina Aleksandrovna – Candidate of Technical Sciences, Assistant Professor. https://orcid.org/0000-0003-0155-5094 E-mail: nota-vesna@yandex.kz А.Akchil – professor. https://orcid.org/0000-0002-9991-0543 E-mail: ataakcil@sdu.edu.tr University of Suleyman Demirel, Isparta, Turkey |
Abstract | This article is dedicated to the processing of the secondary tin-containing alloys by the electrochemical method. The provided article reviews exploratory studies regarding the anodic dissolution of the lead-tin solders, conducted by the EСС-1012 electrochemical complex in galvanostatic mode with using as an electrolyte solution of potassium hydroxide. The anodic dissolution was demonstrated to go differently depending on the concentration of alkaline electrolyte. For instance, at 50 g/dm3 concentration of potassium hydroxide, the dissolution commence was recorded at a 0.4 V capacity and the reaction goes predominantly with the HSnO2– formation, also in this case the lead dissolution is unlikely. After that, the anode passivation takes place owing to the formation of oxidation films of the metals and oxygen release. The alkali concentration increases within the electrolyte to 100 g/dm3 leads to a dramatic change in the current potential curves, corresponding to the formation of HSnO2-, HPbO2-, Sn2+ and Pb2+. In addition, an increase of alkali concentration in the solution will contribute to a more active dissolution of the metals, even at the initial stage. As the anode surface develops, it beneficiates alternately with either lead or tin. The formation of tetravalent lead and tin ions upon anodic dissolution of lead-tin alloys in the alkali solutions is unlikely. Within the process of anodic dissolution, an electrolytic sludge was obtained, which contained not only a tin but also the copper, lead, antimony, aluminum and iron have been found. |
Key words | lead-tin solders, alkaline electrolyte, anodic dissolution, electrochemical polarization. |
References |
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Title | A CEMENT CLINKER FORMATION WITH THE USE OF MAGNETITE SCARN ORES WASHERY REFUSES |
Authors | Miryuk О. А.( Rudny, Kazakhstan) |
Author´s information |
Head of the department of building construction materials. Republican state enterprise on the right of business «Rudny Industrial Institute» Ministry of Education and Science of Kazakhstan. Republic of Kazakhstan, Rudny, Kostanay region Miryuk Olga Aleksandrovna – Doctor of Technical Sciences, Professor. https://orcid.org/0000-0001-6892-2763 e-mail: psm58@mail.ru |
Abstract | The clinker formation processes results of studies during the raw mixtures burning to contain magnetite skarn ores washery wastes are submitted. Chemical and mineral compound, thermal transformations of ore washery wastes are provided. The clinker phase formation features involving the man-made component of the raw mixture, which consist of the low-temperature interactions activity, the variety of intermediate phases are revealed. Abelite formation stages with the participation of actinolite, albite, andradite, grossular, diopside, chlorite, epidote are established to determine by gradual transformations of minerals into intermediate phases of C2AS, C3MS2, out of which C2S is formed at 1000 – 1300 °C. An alite formation is intensified due to high-temperature belite formation and doping impurities. The possibility of cement clinkers basicity reducing due to the chemical and mineral characteristics of man-made raw materials is substantiated. The influence of rough ore washery refuses on the alite crystallization nature is investigated, which is manifested in the microvolumes formation differing in the amount and viscosity of the liquid phase. The use of polyfractional refuses gristing was revealed to increase the proportion of highly active fine-crystalline alite, contributing to the cement stone strengthening. The thermal calculations results show 18 – 34 % decrease of heat costs to clinkers formation of different basicity when using ore refuses. |
Key words | magnetite skarn ores, man-made materials, thermal transformations, clinker burning, clinker formation processes, belite, alite |
References |
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Title | ACETIC ACID APPLICATION AS AN ACTIVATING REAGENT IN THE INTENSIVE CYANIDATION OF GRAVITY CONCENTRATES |
Authors | Surimbayev B., Bolotova L., Baikonurova A., Shalgymbayev S. (Almаty) |
Author´s information |
The Branch of the RSE «NC CPMS RK» State Scientific-Industrial Association of Industrial Ecology “Kazmekhanobr”, Almaty, Republic of Kazakhstan Surimbayev Bauyrzhan– Research scientist in the Laboratory of precious metals. https://orcid.org/0000-0002-3988-8444 E.mail: surimbaev@gmail.com Bolotova Lyudmila – Candidate of Chemical Sciences, head of the Laboratory of precious metals. https://orcid.org/0000-0003-0828-9817 E.mail: L_bolotova@yahoo.com Baikonurova Aliya – Doctor of Technical Sciences, professor at the Department “Metallurgical processes, heat engineering and technology of special materials”, Satbayev University, Almaty, Republic of Kazakhstan, E.mail: а.baikonurova@yandex.kz Shalgymbayev Serikbol – Candidate of Chemical Sciences, assistant professor, Director at The Branch of the RSE «NC CPMS RK» State Scientific-Industrial Association of Industrial Ecology “Kazmekhanobr”, E.mail: serikbolnao@mail.ru |
Abstract | The well-known technology of intensive cyanide leaching of gravity concentrates, which allows to bring part of gold into commercial products with obtaining high-purity Dore alloy, requires the use of expensive reagents and high temperature (80 °С) leaching. Studies have been carried out on intensive leaching of gold-containing gravity concentrate in a drum-type apparatus at low concentrations of sodium cyanide with the addition of a new reagent-activator. It is proposed to conduct intensive cyanidation of enriched gravity concentrate using acetic acid as an effective activator reagent. Improving the efficiency of cyanide leaching by introducing activators into the reagent system is achieved by dissolving passivating films on the surface of gold grains. Studies on the intensive leaching of gold in the enlarged laboratory tests. The results of the large-scale laboratory tests on the intensive cyanide leaching of the gravity concentrate using acetic acid as an activating agent activator were fully confirmed by the data of laboratory studies. |
Key words | intensive leaching, gravity concentration, reagent-activator, leaching, acetic acid, gold. |
References |
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