Minerals benefication
Seymushkina L.V., Tusupbayev N.K., Rulev N.N., Turysbekov D.K., Mukhamedilova A.M., Mukhanova A.A.,Sugurbekova A.K. Copper-molybdenum ore flotation technology updating by use of modified reagents
Title | copper-molybdenum ore flotation technology updating by use of modified reagents |
Authors | Seymushkina L.V., Tusupbayev N.K., Rulev N.N., Turysbekov D.K., Mukhamedilova A.M., Mukhanova A.A., Sugurbekova A.K. |
Author´s information | “Center of Earth sciences, metallurgy and ore benefication” JSC, lab of flotation reagents and benefication, Almaty Seymushkina L.V., Cand Tech.Sci, senior scientific worker, syomushkina.lara@mail.ru Tusupbayev N.K., Dr. Tech.Sci, head of lab Turysbekov D.K., Cand Tech.Sci, senior scientific worker Mukhamedilova A.M., leading engineer Mukhanova A.A., junior scientific worker Sugurbekova A.K., leading engineer Scientific development firm “Turboflotservis”, Kiev, Ukraine Rulev N.N., Dr.Chem.Sci, director |
Summary | The processing methods for flotation of Shatyrkol deposit’s copper-molybdenum ore were developed by using basic and modified reagents. Diesel fuel and oil from Kumkol deposit were used as initial substances for the preparation of modified reagent MF-2. The influence of new synthesized foaming agent SVIM, used instead T-90, on the extraction of copper and molybdenum was studied. SVIM – is environmentally safe frother, obtained from alcohol production wastes – fusel oils. The combined application of modified reagents SVIM and MF-2 gains molybdenum extraction from the collective copper-molybdenum concentrate by 10-13%, and copper extraction – by 5-7 %. The consumption of modified reagents is 10-15% less in comparison with the basic reagents. This technology is applicable for mining and beneficiation enterprises processing molybdenum-containing ores. |
Key words | benefication, flotation, ore, recovery, copper, molybdenum, modified reagents, foaming agent |
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Turysbekov D.K., Tusupbayev N.K., Khasanov A.S., Tropman Eh.P., Seymushkina L.V., Mukhamedilova A.M., Abdikulova A.O. Modified reagents application for flotation beneficiation of lead-barite ores
Title | modified reagents application for flotation beneficiation of lead-barite ores |
Authors | Turysbekov D.K., Tusupbayev N.K., Khasanov A.S., Tropman Eh.P., Seymushkina L.V., Mukhamedilova A.M., Abdikulova A.O. |
Author´s information |
“Center of Earth sciences, metallurgy and ore benefication” JSC, lab of flotation reagents and benefication, Almaty Turysbekov D.K., Cand Tech.Sci, senior scientific worker, dula@mail.ru Tusupbayev N.K., Dr. Tech.Sci, head of lab Tropman Eh.P., Cand Tech.Sci, senior scientific worker Seymushkina L.V., Cand Tech.Sci, senior scientific worker Mukhamedilova A.M., leading engineer Abdikulova A.O., leading engineer Navoi State Mining Institute, mining and smelting faculty, Navoi, Uzbekistan Khasanov A.S., Dr. Tech.Sci, dean of faculty |
Summary | Modified reagents were applied to processes of lead and barite flotation from Alashpay ore deposit. In case of lead the modified butyl xanthate prepared from alcohol production waste was applied. Compared to the base butyl xanthate the content of lead in concentrate increased by 1.4% and the extraction – by 4.05%. Consumption of modified xanthate reduced by 6,66 % compared to basic flotation mode. From this ore sample containing the oxidized forms of robustly flotating lead the flotation method was able to extract only 24,2% of lead. In case of barite the modified reagent was obtained on the basis of soap stock (sludge generated as a result of alkali refining of oils and fats in fat-processing industry). The laboratory tests on barite flotation with modified collector showed that barite extraction increases by 4,2 % (from 91.13% to 95.33% in total) compared to ultrasound oleic acid method and the consumption of the modified collector decreased by 200 grams per ton. |
Key words | flotation, benefication, ore, extraction, barite, collector, modified reagents, xanthate, lead, soap stock |
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Tusupbayev N.K., Kalugin S.N., Tusupbayev S.N., Seymushkina L.V., Turysbekov D.K., Mukhanova A.A., Mukhamedilova A.M. Application of modified reagents on improvement of technology for flotation beneficiation of fine-disseminated polymetallic ores
Title | Application of modified reagents on improvement of technology for flotation beneficiation of fine-disseminated polymetallic ores |
Authors | Tusupbayev N.K., Kalugin S.N., Tusupbayev S.N., Seymushkina L.V., Turysbekov D.K., Mukhanova A.A., Mukhamedilova A.M. |
Author´s information |
“Center of Earth sciences, metallurgy and ore benefication” JSC, lab of flotation reagents and benefication, Almaty Tusupbayev N.K., Dr. Tech.Sci, head of lab., nesipbay@mail.ru Kalugin S.N., Dr.Chem.Sci, senior scientific worker Seymushkina L.V., Cand Tech.Sci, senior scientific worker Turysbekov D.K., Cand Tech.Sci, senior scientific worker Mukhanova A.A., junior scientific worker Mukhamedilova A.M., leading engineer Minnesota University, Minneapolis, USA Tusupbayev S.N., Dr.Chem.Sci |
Summary | The flotation technologies for lead-zinc Shalkiya deposits ore were developed by using modified reagents, as butyl xanthate and butiltrietilentetramin (B-TETA). It is shown that the application of these reagents in the flotation beneficiation process can reduce the loss of lead and zinc tailings having sludge flotation size by twice. The use of new effective cationic nitrogen containing substances (in particular B-TETA) improves the extraction of useful components in the concentrates and reduces the consumption of the main collector – butyl xanthate by 10-15%. The percentage of useful components in the flotation tailings produced by the non-modified technology is contained in the finest size fractions (-40 +0 microns), and for the flotation tailings obtained with the B-TETA the largest percentage of non-ferrous metals is contained in the class size -60 +40 microns. This technology is applicable for mining and processing enterprises in processing of fine-disseminated ores of nonferrous metals. |
Key words | beneficiation, flotation, extraction, lead, zinc, collector, modified reagents |
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Metallurgy
Abdykirova G.Zh., Tanekeyeva M.Sh., Morozov Yu.P., Telkov Sh.A., Tojlanbaj G.A., Sydykov A.Ye. Research of technogenic manganese-containing raw materials reductive leaching
Title | Research of technogenic manganese-containing raw materials reductive leaching |
Authors | Abdykirova G.Zh., Tanekeyeva M.Sh., Morozov Yu.P., Telkov Sh.A., Tojlanbaj G.A., Sydykov A.Ye. |
Author´s information |
“Center of Earth sciences, metallurgy and ore benefication” JSC, lab of flotation reagents and benefication, Almaty Abdykirova G.Zh., Cand Tech.Sci, leading scientific worker, abdgul@mail.ru) Tanekeyeva M.Sh., scientific worker Tojlanbaj G.A., leading engineer Sydykov A.Ye. , engineer Ural State Mining University, Yekaterinburg, Russia Morozov Yu.P., Dr. Tech.Sci, professor Kazakh national technical university named after K.I. Satpayev, Almaty Telkov Sh.A., Cand Tech.Sci, associate professor |
Summary | Researches on leaching of manganese-containing slimes of Eastern Kamys deposit’s ore by solutions of sulfuric acid in the presence of metallic iron as a reducing agent were carried out. It was found that increasing the concentration of sulfuric acid from 50 up to 100 g/dm3 in the leaching solution promotes the recovery of manganese up to 98-99% for all investigated size fractions (-0,5+0, -0,315+0, -0,1+ 0 mm). Consumption of reducing agent substantially influences on the dissolution of manganese dioxide: at the metallic iron consumption increases from 40 up to 140% from the stoichiometrically required manganese content in the solution after leaching increases from 7,5 up to 29,7 g/dm3. According to the research the optimal conditions for the slime reductive leaching was determined: the concentration of sulfuric acid – 75 g/dm3 consumption of metallic iron – 140%, the ratio S: L = 1:10, class of slime size -0,1+0 mm, the duration of leaching – 3 hours and the temperature 90 oC. |
Key words | manganese ore, leaching, reducing agent, sulfuric acid, extraction, recovery, slime |
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Abulkasimov A.B., Bliznyuk V.I., Izotov A.T., Karmanov Ye.M., Fomenko A.S. Uranium recovery from organic wastes of refining production of “Taukent mining-and-chemical enterprise” LTD
Title | Uranium recovery from organic wastes of refining production of “Taukent mining-and-chemical enterprise” LTD |
Authors | Abulkasimov A.B., Bliznyuk V.I., Izotov A.T., Karmanov Ye.M., Fomenko A.S. |
Author´s information |
«Institute of High Technologies» LTD. lab of uranium and accompanying elements, Almaty Abulkasimov A.B., specialist Bliznyuk V.I., chief manager, vbob@mail.ru Izatov A.T., chief specialist Karmanov Ye.M., leading manager Fomenko A.S., leading specialist |
Summary | The research on uranium recovery from organic wastes of refining production of “Taukent mining-and-chemical enterprise” Ltd was conducted by burning the third phase in its pure form and its mix with filler. Obtained cinders were dissolved in solutions of sulfuric acid and nitric acid to produce solutions suitable for refinery. The temperatures of flash and firing of the organic phase in pure form and in admixture with a sorbent, and phase compositions of particulates of waste gas of the organic phase in pure form were researched. The dependence of the duration on combustion process temperature, the optimal phase ratio “organic” – “filler” to have the highest quality cinder and take down temperature curves of the process were detected too. The possibility of burning the organic phase with concentrating of uranium in cinder and subsequent leaching of uranium into solutions of sulfuric and nitric acids were shown. |
Key words | uranium, cinder, burning, refining production, leaching, extraction agent, recovery, third phase |
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Bochevskaya Ye.G., Abisheva Z.S., Ajtkaliyev T.N., Reznik A.M., Zhumabekov Zh.Zh., Sargelova Eh.A. Modeling multi-stage countercurrent extraction of osmium from the wastewater of copper production
Title | Modeling multi-stage countercurrent extraction of osmium from the wastewater of copper production |
Authors | Bochevskaya Ye.G., Abisheva Z.S., Ajtkaliyev T.N., Reznik A.M., Zhumabekov Zh.Zh., Sargelova Eh.A. |
Author´s information |
“Center of Earth sciences, metallurgy and ore benefication” JSC, lab of rare scattered elements, Almaty Bochevskaya Ye.G., Cand.Tech.Sci, leading scientific worker, elena_bochevskaya@mail.ru Abisheva Z.S., Dr.Tech.Sci., president of JSC Sargelova Eh.A., engineer Lomonosov Moscow State university of Fine Chemical Technologies, Moscow, Russia Reznik A.M., Dr.Chem.Sci Zhezkazganredmet RGP Ajtkaliyev T.N., deputy director on production and science Zhumabekov Zh.Zh., rare metals machine-shop deputy manager |
Summary | The article presents the results of osmium extraction from the wastewater of copper production. The influence of organic and aqueous phases (O:A) ratio on the extraction of osmium from initial and pre-neutralized with calcium oxide down to residual concentration of sulfuric acid ~ 10 g/dm3 (hereinafter referred to as prepared) wastewater was studied. It is shown that the technological parameters for extraction from the prepared wastewater are much higher. Osmium extraction into the organic phase from the initial wastewater is reduced from 48,1 down to 18,6%, from the prepared wastewater from 88,0 down to 64,1% at changing O:A ratio from 1:1 up to 1:40. The method of variable volumes was used for plotting the isotherm of extraction. It was calculated that six-step extraction requires for osmium recovery from the test solutions. The process of the six-steps countercurrent extraction of osmium from the initial and prepared wastewater at the ratios O:A = 1:1 and 1:20 was modeled. It was found that at O:A = 1:1 and 1:20 osmium recovery from initial wastewater is 22,7 and 12,0%, and from prepared one ~ 99 and 85% respectively. |
Key words | wastewater, osmium, extraction, recovery, isotherm, extract, modeling |
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Kovzalenko V.A., Sadykov N.M-K., Myltykbayeva L.A., Abdulvaliyev R.A., Gladyshev S.V., Pozmogov V.A. Fluoride method for obtaining amorphous silica
Title | Fluoride method for obtaining amorphous silica |
Authors | Kovzalenko V.A., Sadykov N.M-K., Myltykbayeva L.A., Abdulvaliyev R.A., Gladyshev S.V., Pozmogov V.A. |
Author´s information |
“Center of Earth sciences, metallurgy and ore benefication” JSC, Lab of alumina and aluminium , Almaty Kovzalenko V.A., Cand Tech. Sci, leading scientific worker Sadykov N.M-K., junior scientific worker Abdulvaliyev R.A., Cand Tech. Sci, head of lab Gladyshev S.V., Cand Tech. Sci, senior scientific worker Pozmogov V.A., Cand Tech. Sci, senior scientific worker «NSTH Parasat» JSC Myltykbayeva L.A., Cand.Tech.Sci., vice-president |
Summary | Fluoride method for processing of high-silica mineral with obtaining silicon compounds – ammonium hexafluosilicate and amorphous silica is presented in the article. Chemical, phase and mineralogical composition of high-silicon ore was determined by physical-and-chemical methods of analysis. The process of ore and ammonium bifluoride sintering was investigated. The result of this process is separation of charge into the gas phase in the form of ammonium hexafluosilicate and non-volatile fluorine compounds concentrating in solid phase of cake. Sintering was carried out at an apparatus consisting of a tubular furnace, the steel reactor with gas exhaust pipe and the condenser. The optimum technological conditions of the fluorination process: temperature – 550°С, duration – 120 min, ratio of high-silicon raw material to fluorinating reagent – 1/2 were determined. Recovery of silicon into gas phase in the form of ammonium hexafluosilicate reached 98,6% at this conditions. It was found that amorphous silica is formed at interaction of solutions of ammonium hexafluosilicate with ammonia, and application of concentrated ammonia is preferable. |
Key words | high-silicon minerals, amorphous silica, ammonium bifluoride, ammonium hexafluosilicate, sintering |
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Khrapunov V.Ye., Trebukhov S.A., Adylkanova M.A., Tuleutaj F.Kh., Marki I.A. Researches on obtaining branded selenium from bag filters’ dusts of refining production
Title | Researches on obtaining branded selenium from bag filters’ dusts of refining production |
Authors | Khrapunov V.Ye., Trebukhov S.A., Adylkanova M.A., Tuleutaj F.Kh., Marki I.A. |
Author´s information |
“Center of Earth sciences, metallurgy and ore benefication” JSC, lab of vacuum processes, Almaty Khrapunov V.Ye., Dr. Tech.Sci, chief scientific worker Trebukhov S.A., Cand Tech.Sci, head of lab Tuleutaj F.Kh., engineer Marki I.A., Cand Tech.Sci, leading scientific worker D. Serikbayev East Kazakhstan State Technical University, Ust-Kamenogorsk Adylkanova M.A., doctoral student – PhD |
Summary | Results of the researches directed on development of rational technology for obtaining branded selenium from dusts of hose filters of refining production are given. Work was performed with application of vacuum equipment and by using modern methods of the analysis (atomic emission spectral, x-ray fluorescence, electronic and microscopic, X-ray diffractometer). Researches were carried out to three schemes: reception melting of a dust – vacuum distillation of fusion; direct vacuum distillation of a dust; water leaching of a dust – a filtration – selenium reduction from a filtrate – vacuum distillation of cake from leaching and the recovered selenium. It is shown that the third option is the most rational, by the third option the selenium of the CT1 brand intended for export is obtained at its through extraction more than 95%. |
Key words | bag filters dust, selenium, selenium dioxide, melting, vacuum, leaching, reduction, distillation |
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Shokobayev N.M., Dauletbakov T.S., Shokobayev G.T., Murzakhmetova U.A. Rare-earth metals sorption recovery from technological solutions of uranium underground borehole leaching
Title | Rare-earth metals sorption recovery from technological solutions of uranium underground borehole leaching |
Authors | Shokobayev N.M., Dauletbakov T.S., Shokobayev G.T., Murzakhmetova U.A. |
Author´s information |
«Institute of High Technologies» LTD, lab of uranium and accompanying elements, Almaty Shokobayev N.M., chief manager, doctoral student – PhD of KazNTU, n.shokobayev@iht.kz Kazakh national technical university named after K.I. Satpayev, Almaty Dauletbakov T.S., Doc.Tech.Sci, head of Nonferrous metals metallurgy cathedra Shokobayev G.T., Cand.Tech.Sci., associate professor Murzakhmetova U.A., Cand.Tech.Sci., associate professor |
Summary | Sorption characteristics of ion exchange resins 001×7, 005×8, D72 during elements of rare-earth metals (REM) recovery from mother liquors from uranium sorption were investigated in dynamic conditions. It was identified that D72 resin achieves the capacity 2.46 mg/cm3 for sum of analyzed REE after passing 220 specific volumes of initial solution with providing 95% recovery degree for the element of REM with the lowest affinity. It causes existence of certain frameworks during adsorption from uranium mother liquors – the impossibility for variation of pH and salt content in initial solution. Despite the impossibility of variation of initial solution characteristics due to technical and economic feasibility and complicated salt composition of feedstock, it was identified the prospects of using D72 ion exchange resin, which provides high technical parameters on adsorption operation. Studies on REE desorption in dynamic conditions from ion exchange resins 001х7, 005х8 and D72 via passing solutions of 1.7 mol/dm3 HNO3 and 8.0 mol/dm3 NH4NO3 with 0.2 mol/dm3 HNO3 were carried out. It was found that using of eluent on the basis of ammonium nitrate allows to achieve an acceptable REE recovery degree from sorbent phase and, considering possibility of creation of system of circulating eluent solution, increases the prospects of using of ammonium nitrate solution. Obtained results show an ability of organization of REE co-recovery from technological solutions of uranium UBL, and application of circulated eluate solution, prepared on the basis of ammonium nitrate. |
Key words | uranium recovery, ion exchange resins, rare-earth metals, sorption, desorption, underground borehole leaching, co-recovery |
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Khrapunov V.Ye., Trebukhov S.A., Adylkanova M.A., Tuleutaj F.Kh., Marki I.A. Researches on obtaining branded selenium from bag filters’ dusts of refining production
Title | Researches on obtaining branded selenium from bag filters’ dusts of refining production |
Authors | Khrapunov V.Ye., Trebukhov S.A., Adylkanova M.A., Tuleutaj F.Kh., Marki I.A. |
Author´s information |
“Center of Earth sciences, metallurgy and ore benefication” JSC, lab of vacuum processes, Almaty Khrapunov V.Ye., Dr. Tech.Sci, chief scientific worker Trebukhov S.A., Cand Tech.Sci, head of lab Tuleutaj F.Kh., engineer Marki I.A., Cand Tech.Sci, leading scientific worker D. Serikbayev East Kazakhstan State Technical University, Ust-Kamenogorsk Adylkanova M.A., doctoral student – PhD |
Summary | Results of the researches directed on development of rational technology for obtaining branded selenium from dusts of hose filters of refining production are given. Work was performed with application of vacuum equipment and by using modern methods of the analysis (atomic emission spectral, x-ray fluorescence, electronic and microscopic, X-ray diffractometer). Researches were carried out to three schemes: reception melting of a dust – vacuum distillation of fusion; direct vacuum distillation of a dust; water leaching of a dust – a filtration – selenium reduction from a filtrate – vacuum distillation of cake from leaching and the recovered selenium. It is shown that the third option is the most rational, by the third option the selenium of the CT1 brand intended for export is obtained at its through extraction more than 95%. |
Key words | bag filters dust, selenium, selenium dioxide, melting, vacuum, leaching, reduction, distillation |
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Physical-chemical studies
Volodin V.N., Burabayeva N.M., Trebukhov S.A. Tin-selenium system’s components vapor pressure
Title | Tin-selenium system’s components vapor pressure |
Authors | Volodin V.N., Burabayeva N.M., Trebukhov S.A. |
Author´s information |
“Center of Earth sciences, metallurgy and ore benefication” JSC, lab of vacuum processes, Almaty Volodin V.N., Dr. Tech.Sci, Dr. Phis.-Math. Sci., chief scientific worker Burabayeva N.M., Cand Tech.Sci, scientific worker , Nuri_eno@mail.ru Trebukhov S.A., Cand Tech.Sci, head of lab. |
Summary | On the basis of research of the phase diagram tin-selenium and the preliminary information about existing and potential values of vapor pressure of components of double systems tin – tin selenide and tin selenide – selenium a method of boiling points (an isothermal version) is chosen as a method for determination of pressure values of vapor above liquid solutions. As the result of investigation the absent now pressure parameters of the saturated vapor above liquid tin monoselenide and diselenide, as well as liquid solutions of double systems are determined. As a result of distillation evaporation of tin monoselenide and diselenide and the condensate research by X-ray diffractometry it is indirectly established that liquid tin monoselenide evaporates congruentially, vapour over tin diselenide is presented by molecules of tin monoselenide and selenium. The vapor pressure of components in double systems is presented in the form of the temperature – concentration dependences, allowing to determine thermodynamic characteristics of the condensed and vaporous phases. |
Key words | tin, selenium, tin monoselenide, tin diselenide, double systems, vapor pressure, phase diagram |
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Makasheva A.M., Malyshev V.P., Sulejmenov T., Kazhikenova A.Sh. Dual nature of liquid sulfur dynamic viscosity
Title | Dual nature of liquid sulfur dynamic viscosity |
Authors | Makasheva A.M., Malyshev V.P., Sulejmenov T., Kazhikenova A.Sh. |
Author´s information |
Chemical and Metallurgical Institute named named after J. Abishev, Karaganda Makasheva A.M., Dr.Tech.Sci, chief scientific worker, astra_mun@mail.ru Malyshev V.P., Dr. Tech.Sci, head of lab. L.N. Gumilyov Euroasian National University, Astana Sulejmenov T., Dr.Chem.Sci, professor Karaganda State University named after academician E.A. Buketov Kazhikenova A.Sh., Cand Tech.Sci., associate professor |
Summary | The calculated dependence of the dynamic viscosity of liquid sulfur by cluster and associate model is obtained based on the Boltzmann’s distribution and normalized by the melting point. The case of breach of compliance with the conditions under which the temperature of the minimum value of the dynamic viscosity greater than the critical temperature is studied. Correction is carried out and new equation for calculation of indicator of clusters association degree lower is given. Input of component responsible for the chemical heterogeneity of the liquid sulfur and causing an increase of viscosity with increasing temperature is determined in combination with the actual data on the dynamic viscosity. Possibility of identifying two opposite regularity – lowering of the viscosity due to clustered-associative mechanism of interaction of virtual particles, leading to reduction of their share and viscosity increase due to chemical dissociation of stable particles of different molecular composition, followed by the increasing number of physically interacting “fragments” was proved. Analytical description of extreme viscosity change in liquid state with passing through a minimum was presented. |
Key words | randomized particles, Boltzmann’s distribution, cluster, associate, dynamic viscosity, sulfur |
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Shevko V.M., Serzhanov G.M., Uteyeva R.A. Total thermodynamic analysis of the interaction between iron carbide and silicon carbide
Title | Total thermodynamic analysis of the interaction between iron carbide and silicon carbide |
Authors | Shevko V.M., Serzhanov G.M., Uteyeva R.A. |
Author´s information |
Southern Kazakhstan State University named after M. Auezov, Shymkent Shevko V.M., Dr. Tech.Sci, professor Serzhanov G.M., doctoral student – PhD Uteyeva R.A., engineer |
Summary | The article contains results of the thermodynamical modeling for interaction between Fe&sub3;C and SiС in the temperature interval 500-2000°С, executed by means of a program complex Outokumpu HSC-5.1, which is based on a fundamental principle of the Gibbs energy minimum (subprogram «Equilibrium compositions»). From thermodynamical viewpoint it was established, that reactions between Fe&sub3;Si and SiС in the temperature interval 500-2000°С flow with formation of Fe&sub3;Si, Si, Fe&sub3;С, Fe5С&sub3;, FeSi, FeSi&sub2;, Fe, Si. The main iron-silicon containing compounds in the alloy at the low temperatures (500-700°С) are FeSi, Fe&sub3;Si, Fe5Si&sub3;. The phase composition of the formed ferrosilicium depends on SiС/Fe&sub3;С mole ratio and it is characterized by the presence of Fe, Si, FeSi, Fe&sub3;Si, Fe5Si&sub3; in the ferroalloy. Mass content of silicon in the ferroalloy increases from 14,2 up to 45,3% at the changing the SiС/Fe&sub3;Si mole ratio from 1 up to 6. |
Key words | silicon carbide, iron carbide, iron silicides, ferrosilicium, thermodynamics, bundled software Outokumpu |
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Investigation of electrochemical processes
Agapova L.Ya., Abisheva Z.S., Kilibayeva S.K., Beketaeyva L.A. Studying of metals’ ions migration speed in the process of electrodialysis of rhenium-tungsten-containing solutions opened
Title | Studying of metals’ ions migration speed in the process of electrodialysis of rhenium-tungsten-containing solutions |
Authors | Agapova L.Ya., Abisheva Z.S., Kilibayeva S.K., Beketaeyva L.A. |
Author´s information |
“Center of Earth sciences, metallurgy and ore benefication” JSC, lab of rare scattered elements, Almaty Agapova L.Ya., Dr. Tech.Sci, acting head of lab., rm.303.imo@mail.ru Abisheva Z.S., Dr. Tech.Sci., president of JSC Kilibayeva S.K., Cand Tech.Sci., scientific worker Institute of Physical Chemistry and Electro Chemistry, Russian Academy of Sciences, Moscow, Russia Beketaeyva L.A., Cand.Chem.Sci, senior scientific worker |
Summary | The results of research of Re-W-containing model solutions electrodialysis depending on the initial solution pH values, temperature and current density are presented in the article. The rhenium acid is formed in the chamber of concentration in the process of electrodialysis. The influence of initial solution pH values (0.5; 1.0; 2.0) on speed of migration of Re and W ions and their degree of separation in the process of electrodialysis were studied. It is established that the high speed of rhenium ions migration is observed at pH 0.5, tungsten ions – at pH 2. The speed of migration of Re ions increases, and the speed of migration of W ions decreases with increasing solutions temperature (30; 40; 50°C) and current density (100, 200, 300 A/m²). After the finish of electrodialysis 1.03; 1.10; 3.4% respectively (from the initial amount) of tungsten migrated into the concentration chamber depending on the pH (0.5; 1.0; 2.0) of the solution for 20 hours Depending on the temperature (30; 40; 50°C) 1.10; 0.16; 0.83% respectively of tungsten migrated into the concentration chamber for 20 hours. Depending on the current density (100; 200; 300 A/m²) 0.101; 0.10; 0.077% respectively of tungsten migrated into the concentration chamber (for 7 hours). It is established that higher degree of separation of Re and W in the process of electrodialysis of Re-W-containing solution is reached at pH of solution 0.5-1.0, current density 300 A/m², temperature 40-50°C. |
Key words | rhenium, tungsten, solutions, electrodialysis, speed of ions migration, degree of separation |
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High resistant refractories production
Biryukova A.A., Tikhonova T.A., Panichkin A.V., Mamayeva A.A. Boronina A.V. Kvyatkovskaya M.N. Porous ceramics with aluminosilicate structure based on corundum
Title | Porous ceramics with aluminosilicate structure based on corundum |
Authors | Biryukova A.A., Tikhonova T.A., Panichkin A.V., Mamayeva A.A. Boronina A.V. Kvyatkovskaya M.N. |
Author´s information |
“Center of Earth sciences, metallurgy and ore benefication” JSC, lab of physical metallurgy, Almaty Biryukova A.A., Cand.Tech.Sci., leading scientific worker, biryuk.silikat@mail.ru Tikhonova T.A., scientific worker Panichkin A.V., Cand Tech.Sci., vice-president of JSC Mamayeva A.A., Cand Tech.Sci., head of lab. Boronina A.V., junior scientific worker lab of physical methods of analysis Kvyatkovskaya M.N., scientific worker |
Summary | Тhe purpose of the work is obtaining aluminosilicate ceramics based on corundum with stable porous structure and low temperature of roasting. The results of the porous ceramic with aluminosilicate composition obtaining by method of pressing of semi-dry masses based on compositions containing corundum and cullet, as well as corundum, or aluminum hydroxide, refractory clay and fluxing additive in the form of boric acid are presented in the article. Compositions for the production of porous ceramics consisted of mono fractional powders with particles size ≤ 63 μm. Solution of technical lignosulfonate with density 1,23 g/cm³ was used as temporary binding. Specific pressure for samples-substrates compressing was 20 n/mm², optimum temperature for ceramics burning -1000°С. Ceramic substrates with aluminosilicate structure were obtained on the basis of mentioned compositions with open porosity 45-50%, capillary porosity – 32-38%, shrink – 0,2-0,8%, compressive strength – 35-46 n/mm². |
Key words | porous ceramic substrate, capillary porosity, corundum, glass scrap, cullet, refractory clay, mullite, burning, strength |
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