Mining
Kasymkanova H.M. Estimation of rock massif stability at open mining works
Title | Estimation of rock massif stability at open mining works |
Author | Kasymkanova H.M. |
Authors’ Information | The Kazakh national technical university named after K.I. Satpayev, Almaty Kasymkanova H.M. head of cathedra, khaini_kamal@mail.ru |
Abstract | Engineering methods for calculation of stability of pit boards are analyzed in the article. New ideas of massifs stability at open mining works are stated. On the basis of main guidelines of mechanics of rocks the equations describing a surface in the rock massif are found. Locations and angles of inclination of elementary platforms displacement which correspond to physical-mechanical properties of the rock massif are determined. In this work, unlike traditional, use of geometrical characteristics of an elementary platform of displacement by its limiting vertical sections is accepted. |
Keywords | Open-cast mine, board, pit slopes, stability, physical-mechanical properties, strata movement, method of circular cylindrical surface, rock massif |
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Mineral benefication
Bekturganov N.S., Tussupbayev N.K., Turysbekov D.K., Semushkina L.V., Mukhanova A.A. Major problems of benefication of finely disseminated lead-zinc ore from “Shalkiya” deposit
Title | Major problems of benefication of finely disseminated lead-zinc ore from “Shalkiya” deposit |
Author | Bekturganov N.S., Tussupbayev N.K., Turysbekov D.K., Semushkina L.V., Mukhanova A.A. |
Authors’ Information | “Center of Earth sciences, metallurgy and ore benefication” JSC, Almaty Lab of flotation reagents and benefication Tussupbayev N.K., head of lab Turysbekov D.K., senior scientific worker Semushkina L.V., senior scientific worker Mukhanova A.A., junior scientific worker Bekturganov N.S., president of JSC «Parasat» |
Abstract | Complex physicochemical investigations of benefication of finely disseminated lead-zinc ore from “Shalkiya” deposit have been carried out. These researches were aimed to optimization of technological regime for obtaining conditioned selective concentrates. Technological probe of lead-zinc ore from “Shalkiya” deposit containing 1.3 % of lead and 3.7 % of zinc, has been used. The results show that half of useful components from the ore, ground up to 90 % of class – 0.074 mm, are concentrated in a fraction of 0 – 10 μm. More than 40 % of minerals during the grinding are sludge formed. Technology with the use of pulp heat treatment, which improves the floatability of sludge particles, is offered. Zinc recovery to the zinc concentrate is increased from 63.2 % to 67.3 % as a result of heating the slurry up to 55-60°C. Lead recovery into the lead concentrate is increased from 50.4 % up to 59.2 %. |
Keywords | lead-zinc ore, sliming, dressability, flotation, recovery, thermal heating |
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Semushkina L.V., Tussupbayev N.K., Turysbekov D.K., Kaldybayeva Zh.A., Mukhanova A.A., Mukhamedilova A.M. Improvement of technology for copper-molybdenum concentrate selection by use of modified reagents
Title | improvement of technology for copper-molybdenum concentrate selection by use of modified reagents |
Author | Semushkina L.V., Tussupbayev N.K., Turysbekov D.K., Kaldybayeva Zh.A., Mukhanova A.A., Mukhamedilova A.M. |
Authors’ Information | Center of Earth sciences, metallurgy and ore benefication” JSC, Almaty Lab of flotation reagents and benefication Semushkina L.V., senior scientific worker Tussupbayev N.K., head of lab Turysbekov D.K., senior scientific worker Kaldybayeva Zh.A., junior scientific worker Mukhanova A.A., junior scientific worker Mukhamedilova A.M., leading engineer |
Abstract | Investigation of improvement of technology for selection collective copper-molybdenum con centrate from Shorskoye ore deposit by use of modified reagents has been carried out. The mixture of diesel-fuel with TC-7000 (reagent MF-1) and the mixture of diesel-fuel with petroleum from Kumkol deposit (reagent MF-2) in the ratio 1:1 have been used as modified reagents. Composition of utilized substances has been studied by means of IR-spectroscopy method. Optimal consumption of utilized reagents has been determined, and it is equal to 125 g/t. Investigations show that using of MF-1 leads to increase of molybdenum content in the concentrate by 1.9 % and molybdenum recovery into the concentrate – by 4.5 % as compared with conventional technology with the use of kerosene. Using оf MF-2 leads to increase of molybdenum content in the concentrate by 7.0 % and molybdenum recovery into the concentrate – by 2.5 %. |
Keywords | dressability, flotation, ore, recovery, molybdenum, collector, modified reagent, benefication |
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Turysbekov D.K., Tussupbayev N.K., Semushkina L.V., Yerzhanova Zh.A., Kaldybayeva Zh.A., Bilyalova S.M., Mukhamedilova A.M. Development of technology for preparation of a novel nanoactivator of sphalerite based on copper minerals – chalcopyrite and bornite
Title | Development of technology for preparation of a novel nanoactivator of sphalerite based on copper minerals – chalcopyrite and bornite |
Author | Turysbekov D.K., Tussupbayev N.K., Semushkina L.V., Yerzhanova Zh.A., Kaldybayeva Zh.A., Bilyalova S.M., Mukhamedilova A.M. |
Authors’ Information | Center of Earth sciences, metallurgy and ore benefication” JSC, Almaty Lab of flotation reagents and benefication Turysbekov D.K., senior scientific worker Tussupbayev N.K., head of lab Semushkina L.V., senior scientific worker Yerzhanova Zh.A., junior scientific worker Kaldybayeva Zh.A., junior scientific worker Bilyalova S.M., вед. инженер Mukhamedilova A.M., leading engineer |
Abstract | The technology for preparation of a novel nanoactivator based on copper minerals – chalcopyrite and bornite – has been developed. Histograms of ground chalcopyrite particles distribution show that after grinding during 1 hour amount of chalcopyrite particles of size 40-300 nm is 46.1 %, after 2 hours of grinding – 51.4 %, after 3 hours – 57.3 %. It is shown that the flotation of sphalerite is possible with the use of chalcopyrite nanoparticles as an activator with some decrease in recovery (by 2-3 %). Herewith, consumption of chalcopyrite is much lower (10 times) than the consumption of copper sulfate. Consumption of copper sulfate is 200 mg/dm3, chalcopyrite – 20 mg/dm³. When using the chalcopyrite containing 57.3 % of nanoparticles at consumption 25 mg/dm³, sphalerite recovery is equal to 76 % versus 78 % with copper sulfate. Sphalerite flotation in presence of bornite nanoparticles as an activator at pH 9 is more effective than with chalcopyrite and copper sulfate. However consumption of bornite, as well as consumption of chalcopyrite, is 10 times lower than for copper sulfate. When using the bornite containing 56.6 % of nanoparticles at consumption 25 mg/dm³, sphalerite recovery is 81 % versus 78 % with copper sulfate and 82 % with copper oxyhydroxide. |
Keywords | nanoactivator, grinding, copper sulfide minerals, sphalerite, flotation, recovery, bornite, chalcopyrite |
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Metallurgy
Dikhanbayev B.I., Dikhanbayev A.B. Preconditions of nonwaste processing of tin concentrates based on unit “phase inversion reactor – tubular furnace”
Title | Preconditions of nonwaste processing of tin concentrates based on unit “phase inversion reactor – tubular furnace” |
Author | Dikhanbayev B.I., Dikhanbayev A.B. |
Authors’ Information | Institute of organic catalysis and electrochemistry named after D. Sokolskiy, Almaty Dikhanbayev B.I., scientific worker “Taraz” Ltd Dikhanbayev A.B., deputy director on science, otrar_kz@yahoo.com |
Abstract | Based on melting unit of new generation and efficient technology, the energy-saving scheme of nonwaste system for processing refractory Sn-concentrates together with Zn-containing slags is developed. At implementation of offered system, the heat efficiency will be 1,42 times, and the total index of wastelessness 5,3 times higher than in existing slag-fuming plants. |
Keywords | tin, lead, refractory concentrates, phase inversion reactor, tubular furnace |
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Kvyatkovskiy S.A., Kozhakhmetov S.M., Sokolovskaya L.V., Shamgunov A.S., Imanbakiev V.G., Semenova A.S. Distribution of zinc and iron in oxide-sulfide systems appeared by processing balanced mixes based on copper concentrates of Kazakhstan
Title | Distribution of zinc and iron in oxide-sulfide systems appeared by processing balanced mixes based on copper concentrates of Kazakhstan |
Author | Kvyatkovskiy S.A., Kozhakhmetov S.M., Sokolovskaya L.V., Shamgunov A.S., Imanbakiev V.G., Semenova A.S. |
Authors’ Information | “Center of Earth sciences, metallurgy and ore benefication” JSC, Almaty Lab of pyrometallurgy of heavy nonferrous metals Kvyatkovskiy S.A., зав. лаб. Kozhakhmetov S.M., chief scientific worker Sokolovskaya L.V., senior scientific worker Shamgunov A.S., scientific worker Imanbakiev V.G., engineer – Semenova A.S., leading engineer – |
Abstract | Standing distribution of zinc in products of smelting balanced mixes concentrates of Kazakhstan gives possibilities to establish that by smelting for high content copper matte (45-55%) recovering zinc into matte by increasing spending of blowing mixes on 2-5 l/h by charge on concentrates 100 g decreases on 10-30%, but recovering zinc into slag and gas increases on 10-40% and 1-8% accordingly. So, by smelting of concentrates mix (Akbastau, Zhezkent, ZhOF) in proportion 28:28:44% is shown that extraction of zinc into matte decreases from 73,2 to 33%, extraction of zinc into slag increases from 25,2 to 63,5%, extraction into dust increases from 1,6 to 3,2%. It is determined, that iron recovery in the same circumstances change in following way: in matte decrease on 10-35%, in slag increase on 10-20%, recovery iron into dust almost not change. It is shown that by smelting of concentrates mix (ZhOF, Balkhash, Akbastau) in proportion 25:5:70% by increasing of spending blowing mix from 18,43 to 20,13 l/h extraction of iron into matte decreases from 25,6 to 15,1%; extraction of iron into slag increases from 72,8 to 83,3%; extraction into dust doesn’t change and is 1,5%. |
Keywords | zinc, iron, matte, slag, copper concentrates, autogenous smelting |
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Naimanbaeyv М.А., Ulassuyk S.M., Onaeyv M.I., Alzhanbaeyva N.S. Study of physicochemical properties of products of ilmenite concentrates electrosmelting depending on the type and quantity of carbonaceous reducing agent in charge
Title | Study of physicochemical properties of products of ilmenite concentrates electrosmelting depending on the type and quantity of carbonaceous reducing agent in charge |
Author | Naimanbaeyv М.А., Ulassuyk S.M., Onaeyv M.I., Alzhanbaeyva N.S. |
Authors’ Information | “Center of Earth sciences, metallurgy and ore benefication” JSC, Almaty Lab of titanium and rare refractory metals Naimanbaeyv М.А., head of lab Ulassuyk S.M., scientific worker Onaeyv M.I., leading scientific worker Alzhanbaeyva N.S., leading engineer |
Abstract | Researches on smelting charge of ilmenite powder and a reducing agent are carried out. As a reducing agent сoke, anthracite and semi-сoke derived from Shubarkol coal are used. When reduction smelting of ilmenite concentrate with coke powder dust was conducted slag with the contents up to 85.2% TiO2 and 6.4% FeO were obtained; with anthracite-84.8% TiO2 and 6.2% FeO; at smelting of ilmenite concentrate powder with semi-сoke received from the Shubarkol coal slags containing up to 84.5% TiO2 and 6.5% FeO were obtained. It is found that the chemical composition of titanium slags produced by the smelting of ilmenite concentrate with various reducing agents changed slightly and is determined mainly by the fullness of the reactions of iron oxide reduction and degree of titanium dioxide reduction prior to lower oxides. For the processing of titanium-bearing raw materials to use such cheap reducers as coke and semi-сoke derived from Shubarkol coal are recommended. |
Keywords | Reduction, electrosmelting, ilmenite concentrate, titanium oxide, iron oxide, reducer, titanic slag, charge |
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Ultarakova A.A., Naimanbaeyv М.А., Onaeyv M.I., Khalelov A.M., Ulassuyk S.M. Ways of synthetic carnallite processing from wastes of titanium-magnesium productions
Title | Ways of synthetic carnallite processing from wastes of titanium-magnesium productions |
Author | Ultarakova A.A., Naimanbaeyv М.А., Onaeyv M.I., Khalelov A.M., Ulassuyk S.M. |
Authors’ Information | “Center of Earth sciences, metallurgy and ore benefication” JSC, Almaty Lab of titanium and rare refractory metals Ultarakova A.A., scientific worker Naimanbaeyv М.А., head of lab Onaeyv M.I., leading scientific worker Khalelov A.M., engineer Ulassuyk S.M.., scientific worker |
Abstract | It is suggested to obtain synthetic carnallite by water leaching of chloride titanium production waste with addition of sludge from furnace of continuous refining magnesium of foundry department. Sludge is a waste product of magnesium production, it contains chloride salts of potassium and magnesium, significant amount of MgO, as well as carbon and fine dispersed magnesium particles formed by melt convection. At water leaching of chloride wastes of titanium production in the presence of magnesium waste chloride salts of potassium and magnesium are transferred into solution. Finely dispersed metal magnesium, which is in a sludge of magnesium continuous refining furnace, reacts with 3-4 groups’ metal chlorides contained in the waste; as result magnesium chloride is obtained and MgO of furnace sludge increases the pH of the solution up to 6-8, which leads to the deposition of 3-4 groups’ metals in the form of oxides or oxyhydrates. Leach solution after adjusting the content of potassium and magnesium in the ratio of KCl:MgCl2 = 0,778 is sent for a synthetic carnallite production. Residue from the leaching of chloride wastes containing compounds of Fe, Ti, Mn is sent to the head of the electric smelting of ilmenite. Production of synthetic carnallite from dumped products will significantly reduce the cost of carnallite by involving into the processing wastes of Kazakhstani plants. |
Keywords | synthetic carnallite, chloride wastes, leaching, chloride of potassium, chloride of magnesium, magnox, exhaust electrolyte |
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Chepushtanova T.A.
Title | The chalcopyrite thermal decomposition kinetic model |
Author | Chepushtanova T.A. |
Authors’ Information | The Kazakh national technical university named after K.I. Satpayev, Almaty Chepushtanova T.A., senior lecturer, tanya2305@list.ru |
Abstract | Kinetic studies were performed by using the program Thermokinetics with the help of hybrid regularized Gauss-Newton method based on the thermogravimetric curves obtained in the three heating rates – 10,20 and 30°C/min in air. Based on the processing of the results of DTA using nonlinear regression to the measurements with different heating rates (multivariate nonlinear regression) and kinetic curves three-step kinetic model of transition tetragonal chalcopyrite in a cubic shape in the air is developed. In air atmosphere the structural transformation of chalcopyrite described by the three-stage kinetic model with following scheme: A – → B 1 – 2 → – 3 → D; where A – the initial material, B – magnetic transition, and C – the new phase formation; D – direct transition from the stage β-tetragonal chalcopyrite in the cubic form of chalcopyrite is established. Establishing the presence of the magnetic properties of chalcopyrite allows using magnetic separation enrichment to decomposed products of chalcopyrite. Thermokinetics program application, based on a hybrid regularized Gauss-Newton method, allows find the stage-structural transformations of chalcopyrite. |
Keywords | chalcopyrite, kinetic model, thermokinetics program, decomposed products |
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Chumarev V.M., Mansurova A.N., Gulyaeva R.I., Kvyatkovskiy S.A., Kozhakhmetov S.M. Macro mechanism of niobium and tantalum reduction from oxides
Title | Macro mechanism of niobium and tantalum reduction from oxides |
Author | Chumarev V.M., Mansurova A.N., Gulyaeva R.I., Kvyatkovskiy S.A., Kozhakhmetov S.M. |
Authors’ Information | Institute of metallurgy UrBRAS, Yekaterinburg, Russia Chumarev V.M., chief scientific worker, chumarev@vail.ru Mansurova A.N., scientific worker, mannasty@mail.ru Gulyaeva R.I., senior scientific worker., gulroza@mail.ru “Center of Earth sciences, metallurgy and ore benefication” JSC, Almaty Lab of pyrometallurgy of heavy nonferrous metals Kvyatkovskiy S.A., head of lab Kozhakhmetov S.M., chief scientific worker |
Abstract | The existing schemes of the maсromechanism of niobium and tantalum recovery from pentoxides were considered. Interactions of FeNb2O6 and FeTa2O6 with carbon were studied by X-ray analysis, thermodynamic modeling, thermogravimetry and mass spectrometry. It was revealed that the reduction process of niobium from FeNb2O6 was accompanied by the formation of intermediate oxide phases – [(Fe,Nb)O2] and (NbO2). Reduction of tantalum from FeTa2O6 was occurred by the formation of Ta2O5. The final phases of niobium or tantalum were NbC and TaC carbides. Schemes of metals reduction from FeNb2O6 and FeTa2O6 were suggested which were confirmed by experiment and analysis of known views on the reduction maсromechanism of metals from oxides. |
Keywords | Tantalum oxide, niobium oxide, reduction, carbon, temperature, thermogravimetry |
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Shevko V.M., Serzhanov G.M., Karatayeva G.E. Iron silicides formation in the system ”Zhajrem ore – coal mining wastes – iron”
Title | Iron silicides formation in the system ”Zhajrem ore – coal mining wastes – iron” |
Author | Shevko V.M., Serzhanov G.M., Karatayeva G.E. |
Authors’ Information | Southern Kazakhstan state university named M.Auezov, Shymkent Shevko V.M., professor Serzhanov G.M., doctoral student Karatayeva G.E., docent |
Abstract | In view of the coke deficiency in Kazakhstan a search of ferroalloys smelting technologies with use of natural coals is necessary. The article contains research results of determination of ferrosilicium formation regularities at electrosmelting of the Zhajrem deposit ore (79,6 % SiO2, 5,8 % ZnCO3) in the presence of the Lenger coals mining wastes (26,8 % C, 44 % SiO2), executed by means of the full thermodynamic analysis under the program HSC-5,1 (Outokumpu). It is established, that in the system the ore – coal mining wastes – iron the initial temperature of iron silicides formation decreases from 1331°С to 1229°С at the iron content increase in the charge from 15 to 30 %; with the iron share growth in the system the increase in transition degree of silicon into ferroalloy up to 75 % is observed (at Т=1700°С); the iron content reduction in the charge promotes the high quality ferrosilicium production; zinc is reduced and completely passes into a gaseous state at T>1500°С, and lead – up to 70,1-80,6 % at Т=1700-1800°С. |
Keywords | brown coals mining wastes, silicon-zinc-containing ores, thermodynamic modelling, iron silicides formation, zinc distillation |
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Metallic systems investigation
Dikhanbayev B.I., Dikhanbayev A.B. Corrosion resistance of stainless steels in the presence of ozone
Title | Corrosion resistance of stainless steels in the presence of ozone |
Author | Таtаrchеnko G.О., Yar-Мukhаmеdоvа G.Sh. |
Authors’ Information | Eastern- Ukrainian national university named after V. Dal, Severodonetzk, Ukraine Таtаrchеnko G.О., docent “Center of Earth sciences, metallurgy and ore benefication” JSC, Almaty Lab of physical metallurgy Yar-Мukhаmеdоvа G.Sh., chief scientific worker |
Abstract | The corrosion and electrochemical behavior of stainless steels in sour solutions in the presence of ozone on a steel 12Х18Н10Т example is considered. Metal-graphic, polarizing, gravimetric researches are carried out. It is revealed that in sour environments in the presence of ozone corrosion for stainless steel develops evenly on all surface of metal. Speeds of corrosion are lower than it, than without ozone and steel can be used as constructional in environments to 30 % of H2SO4 at t=20°C. It is established that in ozonized solutions of sulfuric acid of average concentration steel 12Х18Н10Т is in a condition of unstable passivity. The intercrystalline corrosion which is so dangerous and probable for these in solutions of sulfuric acid, at ozonization of environments isn’t observed. In the case of intercrystalline corrosion presence, for example, in welded connections its development is essentially slowed down. |
Keywords | stainless steel, ozone, sour solution. between crystal corrosion, pitting |
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Yar-Mukhamedova G.Sh., Darsheva A.М., Moldabayev M., Zabortcev S.Р. Investigation of nano-dispersion phase components’ ratio influence on corrosion resistance of Cr-SiO-C nano-composition electrolytic coatings
Title | Investigation of nano-dispersion phase components’ ratio influence on corrosion resistance of Cr-SiO2-C nano-composition electrolytic coatings |
Author | Yar-Mukhamedova G.Sh., Darsheva A.М., Moldabayev M., Zabortcev S.Р. |
Authors’ Information | “Center of Earth sciences, metallurgy and ore benefication” JSC, Almaty Lab of physical metallurgy Yar-Mukhamedova G.Sh., chief scientific worker Moldabayev M., scientific worker Zabortcev S.Р., scientific worker Department of intellectual property and international cooperation Darsheva A.М., head of department |
Abstract | The report presents the results of experiments on introduction of nano-size particles of silicon dioxide SiO2 (5-50 nm) and lamp soot C (11-100 nm) into chromium electrolytic coating and investigation of corrosion resistance in 3% NaCl solution. Nano-composition electrolytic coatings were obtained at the various density of current: 2, 3, 4, 5, 6, 7 kА/m², temperatures 303-343 K and various nano-dispersion phase components’ ratio. The morphology of coatings surface was investigated by electron- and atom-force microscope before and after corrosion tests. It was established, that nanostructured composition electrolytic coatings, which were obtained in electrolytes containing 18-14 g/dm³ SiO2 and 2-6 g/dm³ C, at temperature 303-343 K, density of current – 4-5 kА/m², have the highest corrosion resistance. |
Keywords | nanostructured composition electrolytic coatings (nano-CEC), corrosion resistance, pitting, microstructure, chromium electrolytic coating, silicon dioxide, lamp soot |
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Industrial waste utilization
Agapova L.Ya., Abisheva Z.S., Kilibayeva S.K., Makatayeva A.B., Ruzakhunova G.S., Sapukov I.A. Deposition of poorly soluble compounds of tungsten from tungsten-rhenium-containing solutions
Title | Deposition of poorly soluble compounds of tungsten from tungsten-rhenium-containing solutions |
Author | Agapova L.Ya., Abisheva Z.S., Kilibayeva S.K., Makatayeva A.B., Ruzakhunova G.S., Sapukov I.A. |
Authors’ Information | “Center of Earth sciences, metallurgy and ore benefication” JSC, Almaty Lab of rare scattered elements Agapova L.Ya., deputy head of lab Abisheva Z.S., president of JSC Kilibayeva S.K., scientific worker Makatayeva A.B., engineer lab of physical methods of analysis Ruzakhunova G.S., head of lab Sapukov I.A., scientific worker |
Abstract | The results of research on the deposition of poorly soluble compounds of tungsten by acids from W-Re-containing solutions have been presents in the paper. Experiments were conducted for choice of optimal precipitant of poorly soluble compounds of tungsten that would achieve the greatest degree of separation of tungsten and rhenium. From model W-Re-containing solutions (g/dm³: 124.8 W; 1.0 Re) tungstic acid was precipitated by solutions of hydrochloric, nitric and sulfuric acids in the ratio W: acid equal to 1:12. It was established that the better separation of tungsten and rhenium occurs when sulfuric acid is used as a reagent-precipitant. The tungsten content in the precipitate of tungstic acid was 76.0%, rhenium-0.07%. Up to 91.1% of tungsten and 10.5% of rhenium from initial solution was transferred into the precipitate. Cleaning of tungsten acid was as follows. The tungsten acid was dissolved in ammonia-alkaline solution. The tungstic acid was re-precipitated again from this solution by mineral acids solutions. It was established that in the resulting this operation succeeded to reduce the content of rhenium in tungstic acid on 1-2 order (down to 0.001%). |
Keywords | tungsten, rhenium, deposition, poorly soluble compounds, mineral acids |
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Kilibayeva S.K., Agapova L.Ya., Abisheva Z.S., Makatayeva A.B., Ruzakhunova G.S., Sapukov I.A. Deposition of poorly soluble salt of potassium perrhenate from rhenium-tungsten-containing solutions
Title | Deposition of poorly soluble salt of potassium perrhenate from rhenium-tungsten-containing solutions |
Author | Kilibayeva S.K., Agapova L.Ya., Abisheva Z.S., Makatayeva A.B., Ruzakhunova G.S., Sapukov I.A. |
Authors’ Information | “Center of Earth sciences, metallurgy and ore benefication” JSC, Almaty Lab of rare scattered elements Kilibayeva S.K., scientific worker Agapova L.Ya., deputy head of lab Abisheva Z.S., president of JSC Makatayeva A.B., engineer Lab of physical methods of analysis Ruzakhunova G.S., head of lab Sapukov I.A., scientific worker |
Abstract | The results of research on the deposition of poorly soluble salt of potassium perrhenate from Re-W-containing solutions by various precipitators have been presents in the paper. From sulfuric acid electroplating wastewater (g/dm³: 4,16 Re; 0,34 W), containing impurities of sodium fluoride, potassium perrhenate was precipitated by potassium chloride or hydroxide. It was established that the best precipitant for this solution is potassium hydroxide. The rhenium content in the precipitate of potassium perrhenate reaches 61.3%, tungsten – 0.14%. Up to 62.4% of rhenium and up to 1.76% of tungsten of the total amount in the initial solution was transferred into the precipitate. From model sulfuric acid (pH 2) Re-W-containing (g/dm³: 5,0 Re; 0,4 W) solutions potassium perrhenate was precipitated by potassium chloride, hydroxide, sulfate and carbonate. It is established that a deeper separation of rhenium and tungsten during deposition of potassium perrhenate is observed when potassium carbonate was used as a precipitant. The rhenium content in the precipitate of potassium perrhenate reaches 59.1%, tungsten – 0.11%. Up to 87.01% of rhenium and 3.64% of tungsten of the total amount in the initial solution were transferred into the precipitate. |
Keywords | rhenium, tungsten, deposition, poorly soluble salt, potassium perrhenate, potassium compounds |
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Environment protection
Zhunisbekov S., Zhashen S.Z., Zhunisbekov S.S. Questions of safety and ecology in the problems of energy development
Title | Questions of safety and ecology in the problems of energy development |
Author | Zhunisbekov S., Zhashen S.Z., Zhunisbekov S.S. |
Authors’ Information | Taraz technical institute Zhunisbekov S., chancellor Zhashen S.Z., vice-chancellor Zhunisbekov S.S., lecturer |
Abstract | The authors in the article present an analysis of the status of energy development in the developed countries, paying attention to the increasing share of nuclear energy. They focus on the problems faced Kazakhstan on issues of growth needs of the industry and the public in energy. Based on a comparison of the environmental impact of nuclear and thermal power plants with the same electrical power, it was provided evidence of a significant predominance of emission coal-fired plants with the radiation factor in comparison with modern nuclear power plants. Objective information about the problems of the economy, the overall ecology and radioecology in deciding how to develop power in the Republic of Kazakhstan is presented in generalized version based on the existing extensive factual material. The authors insist on the need to convince the population as a very promising the nuclear power, advocate reliability and ecological compatibility of modern and, especially, the future nuclear power plants. The authors hope that their paper will make a definite contribution to the provision of citizens by accessible information about the most sharp issues and challenges of energy development in Kazakhstan. |
Keywords | thermal and electrical energy, atomic (nuclear) energy, environment, radiation factors, renewables, fusion energy, radioactivity, radiotoxicity, scarce materials, cadmium, tellurium, radiophobia |
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National science laboratories
Panichkin A.V., Kozhakhmetov T.I. Rendered services quality and trust of consumers and customers are basic aim of national scientific laboratory
Title | Rendered services quality and trust of consumers and customers are basic aim of national scientific laboratory |
Author | Panichkin A.V., Kozhakhmetov T.I. |
Authors’ Information | “Center of Earth sciences, metallurgy and ore benefication” JSC, Almaty Panichkin A.V., vice-president of JSC Kozhakhmetov T.I., leading specialist |
Abstract | National Scientific Laboratory of priority direction «Technologies for hydrocarbonic, mining and smelting sectors and service branches connected with them» is opened on the basis of «CESMOB» JSC by joining of 3 operating laboratories of Center: Laboratory of Physical Metallurgy, Laboratory of Physical Methods of Analysis and Chemical Analysis Laboratory. National Scientific Laboratory working allows using high effective analytical equipment for realization of large and significant for national economy scientific and technical problems. Basic tasks of National Scientific Laboratory: organizing of centralized park of high-effective analytical and technological equipment for solve of scientific and technical problems of hydrocarbonic, mining and smelting sectors of industry, carrying out complex and high-accuracy analyses of feed materials and products of processing mineral and secondary raw materials, rational use of unique scientific equipment, development of theoretical bases and creation of technologies for obtaining of new materials with specified level of properties on basis of metals and alloys. |
Anniversary
Nikitin Gennadij Mikhailovich - 70 years
Title | Nikitin Gennadij Mikhailovich – 70 years |
Abstract | Gennadij Mikhajlovich Nikitin – scientist-metallurgist, doctor of technical sciences, professor – had celebrated 70 years jubilee on October, 24th, 2012. Gennadij Mikhajlovich has begun his labor way in 1964 at the Kazakh metallurgical plant (Temirtau) when he graduated the Karaganda Polytechnic Institute on a specialty the engineer-metallurgist. Then he worked at Metallurgical Industrial Complex (Nizhnetagil’sk). Many years Gennady Mihajlovich’s scientific and pedagogical activity has been connected with Chemical-Metallurgical Institute (Karaganda) where he has worked about 30 years. Since 1998 Gennadij Mikhajlovich is deputy rector of the Pavlodar University (nowadays Innovative Eurasian University). Now he is also the director of the scientific research institute «Metallurgy and power system» found at university, the professor of chair «Power system and metallurgy» at Innovative Eurasian University. |