Mineral benefication
Yeremin Yu.P, Sydykov A.O., Khajrullina S.T., Sarsenbay A.A., Abdimanapov N.B. Test of pulsation technology at flotation of fine-impregnated gold-bearing ores by semiindustrial flotation apparatus
Title | Test of pulsation technology at flotation of fine-impregnated gold-bearing ores by semiindustrial flotation apparatus |
Authors | Yeremin Yu.P., Sydykov A.O., Khajrullina S.T., Sarsenbay A.A., Abdimanapov N.B. |
Author´s information | “National center on complex processing mineral raw material of Republic Kazakhstan”, Laboratory of chemical benefication of natural and secondary raw materials, Almaty, Yeremin Yu.P., Dr. Tech.Sci, chief scientific worker Sydykov A.O., Dr. Tech.Sci, head of science research department Khajrullina S.T., senior scientific worker , pheruza_b@mail.ru Sarsenbay A.A., leading engineer Abdimanapov N.B., leading engineer |
Summary | Experiments and practice of flotation by developed high-pressure pulsation rotary aerator (HpPRA) at laboratory and pilot machines showed that pressure fluctuations that are created by aerator provide of release of additional amounts of gas for selective flotation of micro-dispersions. At development of flotation apparatus method for selective flotation of micro-dispersions by a field of elastic vibrations to increase the amount of soluble gases was used. Semiindustrial flotation apparatus was tested on samples from 4 gold ore deposits: Koktaszhol, Akbakay, Yubilejnoe, Bakyrchik. The results showed that for all tested types of ore flotation by using HpPRA provided substantial positive effect not only on extraction of metals, but also on the quality of obtained concentrates. Gold content in the concentrate increase 1,76-2,74 times, gold recovery into concentrate increase by 2-5,8 %. |
Key words | pulsation rotary aerator, fluctuations, high-pressure compression, pseudocavitation, substantial composition, gold-bearing ores. |
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Metallurgy
Leont'yev L.I., Sheshukov O.Yu., Nekrasov I.V.Analysis and processing of metallurgical waste
Title | Analysis and processing of metallurgical waste |
Authors | Leont’yev L.I., Sheshukov O.Yu., Nekrasov I.V. |
Author´s information | Metallurgy Institute of RAS Ural Branch, Yekaterinburg, Russia Leont’yev L.I., Dr. Tech.Sci ., chief scientific worker, professor, academician of RAS Sheshukov O.Yu., Dr. Tech.Sci ., chief scientific worker, professor Nekrasov I.V., Cand Tech.Sci., senior scientific worker, ferro1960@mail.ru |
Summary | It is obvious that new approaches are necessary for the organization of effective processing of industrial waste. “The big” plants are not interested in small volume passing production from own waste until the waste does not constrain basic business development. Establishment of ecological payments, environment control – a state prerogative, and reception of passing production is interesting to small business. Thus the following scheme is preferable: small business make production from “big” plant waste in territory of “big” plant. The state can bring the contribution to maintenance of profitability of recycling technologies with standard, information, organizational and other resources. State participation is justified also by the organization in some cases of strategic production, for example rare-earth metals. |
Key words | metallurgical waste, ecological payments, slags, dust, building materials, zinc, rare-earth metals. |
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Osipovskaya L.L., Koizhanova A.K., Yesimova D.N., Yerdenova M.B., Kamalov Eh.M., Magomedov D.R.Combined extraction of precious metals from sulphidic ores of Bestobe depositе
Title | Combined extraction of precious metals from sulphidic ores of Bestobe depositе |
Authors | Osipovskaya L.L., Koizhanova A.K., Yesimova D.N., Yerdenova M.B., Kamalov Eh.M., Magomedov D.R. |
Authors information | “Center of Earth sciences, metallurgy and ore benefication” JSC, lab of noble metals, Almaty Osipovskaya L.L., Cand.Biol.Sci., senior scientific worker Koizhanova A.K., Cand Tech.Sci., senior scientific worker Yesimova D.N., engineer , dina-28@inbox.ru Yerdenova M.B., leading engineer Kamalov Eh.M., senior scientific worker Magomedov D.R., engineer |
Summary | The article is devoted to combined method of extraction of precious metals in acidic medium from sulphidic ore of Bestobe deposit. In the experiments the fractions with size of 5-10 mm were used. In the laboratory studies of gold acidic leaching the combined approach was applied, that involves two directions: physical-chemical (in the presence of oxidizers – iron chloride and sodium hypochlorite) and biochemical with using iron-oxidizing bacteria Acidithiobacillus ferrooxidans, which were grown in the laboratory by standard methods on nutrient medium. The proposed combination of sulphuric acid, oxidizing agents (iron chloride and sodium hypochlorite) and acidophilous bacteria – Acidithiobacillus ferrooxidants, instead of cyanic solvent promotes increasing the degree of gold extraction up to 61,0 and silver – up to 31,1% ( for 48 hours). Combination of proposed methods provides effective and ecological safety technology of raw materials processing. |
Key words | metals recovery, sulphidic ore, sodium hypochlorite, iron chloride, gold, silver, acidophilous bacteria. |
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Sarsenbay G., Myltykbayeva L.A., Abdulvaliyev R.A., Sadykov N. M.-K., Kovzalenko V.A., Ayupov D.T.Obtaining nano-sized aluminum oxide from semi-products of alumina production
Title | Obtaining nano-sized aluminum oxide from semi-products of alumina production |
Authors | Sarsenbay G., Myltykbayeva L.A., Abdulvaliyev R.A., Sadykov N. M.-K., Kovzalenko V.A., Ayupov D.T. |
Author´s information | “Center of Earth sciences, metallurgy and ore benefication” JSC, lab of alumina and aluminium , Almaty Sarsenbay G., Cand.Tech.Sci., scientific worker, mer-pa@mail.ru Abdulvaliyev R.A., Cand.Tech.Sci., head of lab Sadykov N. M.-K., scientific worker Kovzalenko V.A., Cand.Tech.Sci., leading scientific worker Ayupov D.T., engineer Myltykbayeva L.A., Cand.Tech.Sci., vice-president «Parasat» JSC |
Summary | The results of research on the obtaining nano-sized aluminum oxide from semi-products of alumina production by method of chemical precipitation, which consists in the synthesis of nano-sized aluminum hydroxide, followed by thermal processing to obtain crystalline oxide were shown. The main advantages of chemical method in comparison with other are low cost of production and the possibility of obtaining powders with specified composition in industrial scale. Circulating aluminate solution of Pavlodar aluminum plant with a concentration of Na2O – 260g / dm3 and αk – 2,62 was used as initial raw material. Precipitating reagent – NH4HCO3solution with a concentration of 80 g/dm3; dispersant – TWEEN 20 in a quantity 3% on the mass an alkaline aluminate solution were used. Test sample of nano alumina containing monophase of corundum – Al2O3 99,4% and impurities SiO2 < 0,5, Na2O – 0,28, Fe2O3 < 0,005 %, with a minimum scatter in size relative to the average value of – 80 nm, suitable for use in the production of high strength and efficient electronics and structural ceramics was obtained. Technological stages for obtaining nano-sized aluminum oxide from alumina production semiproducts are presented. |
Key words | nanosized alumina, dispersed aluminum hydroxide, precipitation, alkaline aluminate solution, phase composition. |
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Tanutrov I.N., Sviridova M.N.Study of physicochemical properties of the zinc-containing furnace sludge
Title | Study of physicochemical properties of the zinc-containing furnace sludge |
Authors | Tanutrov I.N., Sviridova M.N. |
Author´s information | Metallurgy Institute of RAS Ural Branch, Yekaterinburg, Russia Tanutrov I.N., Dr. Tech.Sci, chief scientific worker Sviridova M.N., Cand Tech.Sci., senior scientific worker, marina-sviridova@list.ru |
Summary | Zinc-containing blast furnace sludges content of iron meet the charge for blast-furnace production. However, the presence of zinc restricts further recycling. For this reason, sludge directed to sludge dumps, which upsets the ecological situation in the regions. The purpose of the work was to obtain the data for the development of technologies for wastes recycling to release products that are suitable for further processing. The paper presents data on research of composition and properties of zinc-containing sludges accumulated in dumps. Temperature intervals of sintering and recovery disperse sludge were specified. It is established that the amount of carbon present in the slurry is 25% higher than required for complete reduction of compounds of iron, zinc, manganese and lead up to the corresponding metals. In the range of 900-1200°C, the metallization of pattern with an intensive formation of metallic iron, and removing the zinc vapor into the gas phase were taken place. The degree of metallization of iron at 1200°C reaches 87%, removal of zinc – 96%, carbon burnout – 61% and the sulfur removal – 27%. Expose samples at 1150 and 1200°C increases these values by 2,5, 2,7, 25 and 0,1%. |
Key words | zinc-containing blast furnace sludge, physical-mechanical properties, heat treatment. |
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Khrapunov V.Ye , Trebukhov S.A., Marki I.A., Tuleutai F.Kh., Trebukhov A.A.Selenium recovery from slime of sulfuric acid production by vacuum method
Title | Selenium recovery from slime of sulfuric acid production by vacuum method |
Authors | Khrapunov V.Ye., Trebukhov S.A., Marki I.A., Tuleutai F.Kh., Trebukhov A.A. |
Author´s information | “Center of Earth sciences, metallurgy and ore benefication” JSC, Lab of vacuum processes, Almaty Khrapunov V.Ye., Dr. Tech.Sci, professor, chief scientific worker Trebukhov S.A., Cand Tech.Sci., head of lab Marki I.A., Cand Tech.Sci., leading scientific worker , imarki@mail.ru Tuleutai F.Kh., engineer Trebukhov A.A., engineer |
Summary | The results of studies on development of technology for nonchemical vacuum extraction of selenium from sludge of sulfuric acid production of “Kazakhmys Smelting” Ltd (Balkhash) are presented. Currently slimes are not recycled and they are dumped to the sludge fields. There is shown a possibility of separation of selenium from sludge into a separate product containing more than 96% of the main component. Because of the high content of mercury in the initial sludge (more than 3%), which is difficult to detach by vacuum method, further refining to produce branded selenium may be done by vacuum distillation or chemical methods. In order to save capital and operating costs it is rational to transfer obtained selenium into the furnace Kaldo for processing under the existing scheme. The research was executed with application of the vacuum equipment and modern methods of the analysis: atomic-emission, X-ray-fluorescent, electron-microscopic, roentgen-phase, chemical. |
Key words | slime, sludge, selenium, sulfuric acid production, vacuum, distillation, lead, mercury, iodine, condensation. |
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Chepushtanova T.A., Mambetzhanova A.M., Luganov V.A.Study of “Uzhpolimetal” JSC arsenate-calcium cakes thermal decomposition
Title | Study of “Uzhpolimetal” JSC arsenate-calcium cakes thermal decomposition |
Authors | Chepushtanova T.A., Mambetzhanova A.M., Luganov V.A. |
Author´s information | The Kazakh national technical university named after K.I. Satpayev, cathedra “Metallurgical processes, heating engineering and technology of special materials”, Almaty Chepushtanova T.A., Cand.Tech.Sci., docent, tanya2305@list.ru Mambetzhanova A.M., undergraduate Luganov V.A., Dr. Tech.Sci, professor |
Summary | The mechanism of technological and synthesized calcium arsenate thermal decomposition was established. The analysis of the macroscopic and microscopic properties of the samples showed, that the grain size of the calcium arsenate cake and synthesized calcium arsenate is 1.25-0.92 mm. By thermogravimetric study of technological calcium arsenate cake in an air, nitrogen atmosphere and in vacuum it was found that in the temperature range of 380-490°C the dehydration process of calcium orthoarsenates proceeds with loss of crystallization water. At the following heating concomitant compounds – Сa(OH)2 and CaCO3, decomposing processes were developed. The results of X-Ray proved the identity of obtained samples to calcium arsenate Ca3(AsO4)2•2H2O. It was completed wide range of physical and chemical methods of analysis of initial samples of “Uzhpolimetal” JSC for subsequent technological process for arsenic products neutralization. |
Key words | arsenic, arsenate-calcium cake, physical-chemical research, synthesis, thermal analysis.. |
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Physical-chemical studies
Burabayeva N.M., Volodin V.N., Trebukhov S.A., Kasymzhanova A.K.Pressure of saturated vapor and thermodynamic activity of components in system lead – lead selenide
Title | Pressure of saturated vapor and thermodynamic activity of components in system lead – lead selenide |
Authors | Burabayeva N.M., Volodin V.N., Trebukhov S.A., Kasymzhanova A.K. |
Author´s information | “Center of Earth sciences, metallurgy and ore benefication” JSC, Lab of vacuum processes, Almaty Burabayeva N.M., Cand Tech.Sci., scientific worker, Nurilyam_86@mail.ru Volodin V.N., Dr. Phis.-Math. Sci., Dr. Tech.Sci, chief scientific worker Trebukhov S.A., Cand Tech.Sci., head of lab Kasymzhanova A.K., engineer |
Summary | The paper presents the experimental and calculated results for the determination of the vapor pressure of the liquid solutions of the binary system of lead-lead selenide, and over liquid lead. Determination of the vapor pressure of lead-based alloys was performed by indirect variant of a static method, and – on the basis of lead selenide by boiling point method at temperatures 800-1100°C. The vapor pressure above the liquid lead corresponds to relationship: lnpPb [Па]=22,941-22994•T-1, which practically coincides with the reference data. The obtained data of the lead and lead selenide vapor pressure were represented as temperature-concentration dependences, allowing to determine the thermodynamic characteristics of the condensed and vapor phases. |
Key words | lead, lead selenide, dual system, alloy, vapor pressure, condensed phase, solution, vapor phase. |
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Fedorovich Ya.A., Malyshev V.P., Makasheva A.M., Kazhikenova A.Sh.Method of full approximation of experimental data to cluster-associate model of dynamic viscosity
Title | Method of full approximation of experimental data to cluster-associate model of dynamic viscosity |
Authors | Fedorovich Ya.A., Malyshev V.P., Makasheva A.M., Kazhikenova A.Sh. |
Authors information | Chemical and Metallurgical Institute named after J. Abishev, Lab of entropic-information analysis, Karaganda Fedorovich Ya.A., undergraduate Malyshev V.P., Dr. Tech.Sci., head of lab eia_hmi@mail.ru Makasheva A.M., Dr. Tech.Sci., chief scientific worker Karaganda State University named after academician E.A. Buketov Kazhikenova A.Sh., Cand Tech.Sci., associate professor |
Summary | Adaptation of proposed by the authors the cluster-associate model of the temperature dependence of viscosity requires taking into account the whole set of experimental data. Previously were selectively used only three reference points, with the remaining subject to review to belong to the resulting mathematical model through the correlation coefficient. Neglect of the rest of the experimental points in the formation of the mathematical model is a disadvantage of this method of data processing. This disadvantage is eliminated by the introduction of procedures for using of the third reference point instead of the entire set of the remaining points based on linearization of the exponential and power hierarchical model of viscosity, which provided full statistical accuracy of the adaptation of the new model to the experimental data. The proposed procedures are checked with regard to the most reliable reference data for the temperature dependence of the dynamic viscosity of lithium in the full range of the liquid state from the melting point to the critical point to obtain the correlation coefficient is equal to unity up to five significant figures. This indicates that the functional nature of the cluster-associate viscosity model using a statistically complete and strict procedures for its adaptation to the experimental data. |
Key words | dynamic viscosity, lithium, cluster-associate model, reference points. |
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Investigation of electrochemical processes
Kilibaeva S.K., Altenova A.N. Abisheva Z.S., Agapova L.Ya., Amanzholova L.U., Beketayeva L.A.Study of metals ions migration speed in the process of rhenium-molybdenum-containing solutions electrodialysis
Title | Study of metals ions migration speed in the process of rhenium-molybdenum-containing solutions electrodialysis |
Authors | Kilibaeva S.K., Altenova A.N. Abisheva Z.S., Agapova L.Ya., Amanzholova L.U., Beketayeva L.A. |
Author´s information | “Center of Earth sciences, metallurgy and ore benefication” JSC, lab of rare scattered elements, Almaty Kilibaeva S. K., Cand Tech.Sci., scientific worker Altenova A. N., leading engineer Abisheva Z. S., Dr. Tech.Sci., corresponding member of RK NAS , president of “CESMOB” JSC Agapova L. Ya., Dr. Tech.Sci, head of lab., rm.303.imo@mail.ru Amanzholova L.U., Cand Tech.Sci., scientific worker, lab of physical methods of analysis Institute of Physical Chemistry and Electro Chemistry, Russian Academy of Sciences, Moscow, Russia Beketayeva L.A., Cand.Chem.Sci, senior scientific worker |
Summary | The results of research of Re-Мо-containing model solutions electrodialysis depending on the initial solution pH values (0.5; 1.0; 2.0), current density (100, 200, 300 A/m2) and temperature (30; 40; 50° C) are presented in the article. The rhenium acid is formed in the chamber of concentration in the process of electrodialysis. It is established that the highest speed of rhenium and molybdenum ions migration into the chamber of concentration is observed at pH 0.5 and current density 100 A/m2, but the speed of rhenium ions migration on 2-3 orders of magnitude higher. The lowest speed of rhenium and molybdenum ions migration was in a solution with pH 0.5 at temperature of 40° C. By method of conductometry it is found that under these conditions the conductivity decreases dramatically. The electrical conductivity of Re-Mo-containing solutions in general increases with increasing temperature, and decreases with increasing pH-value. The study of the structure of solutions by IR spectroscopy showed that the electrolyte pH values decrease leads to the formation in these solutions of sulphate complexes of molibdenil with a larger radius and correspondingly a lower mobility in comparison with ions of ReO4- and MoO42-. It is established that a higher degree of separation of Re and Mo in the process of electrodialysis of Re-, Mo-containing solutions is reached at pH of solutions 2,0, at current density 100 A/m2, at temperature of 50° C. |
Key words | rhenium, molybdenum, solutions, electrodialysis, ions migration speed, degree of separation |
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Materials technology
Panichkin A.V., Mamayeva A.A., Kshibekova B.B., Uskenbayeva A.M., Dzhumabekov D.M..Copper gas-permeable materials with the preset characteristics obtaining processes investigation
Title | Copper gas-permeable materials with the preset characteristics obtaining processes investigation |
Authors | Panichkin A.V., Mamayeva A.A., Kshibekova B.B., Uskenbayeva A.M., Dzhumabekov D.M.. |
Author´s information | “Center of Earth sciences, metallurgy and ore benefication” JSC, Lab of physical metallurgy, Almaty Panichkin A.V., Cand Tech.Sci., “CESMOB” JSC vice-president Mamayeva A.A., Cand Tech.Sci., head of lab Kshibekova B.B., scientific worker Uskenbayeva A.M., engineer Dzhumabekov D.M., engineer |
Summary | In the article researches on obtaining high-porous materials on the basis of sintered copper powders are resulted. Such materials are offered for production of gas-permeable substrates of thin-film hydrogen permeable membranes. Data on dependence of values of linear contraction, the gas permeability, the open porosity, limit of fluidity and hardness on sintering temperature of not pressed copper powders at monoaxial compression of powder layer with various force are described. It is shown, that with increase of temperature and pressure upon powder PMS-1 layer surface value of linear contraction of obtained cylindrical samples grows, and the value of porosity decreases, it entails decrease of gas permeability and increase of durability of obtained material. During electronic- microscopical researches the structural changes in investigated samples are found. It is determined, that with rise of sintering temperature redistribution of copper in structure of dendritic powders is amplified, leading to a thickening of their branches. It is shown, that for obtaining sintered gas-permeable materials preliminary pressing of copper powders is not perspective in view of recrystallization process activation that leads to obtaining practically pore-free material. |
Key words | substrate, gas permeability, hydrogen permeable membrane, copper, sintering |
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Waste utilization
Kogan V.S, Raikhman G.O.Extraction of tin (IV) from sulphate - chloride solution by Alamine 336 and Cyanex 923
Title | Extraction of tin (IV) from sulphate – chloride solution by Alamine 336 and Cyanex 923 |
Authors | Kogan V.S, Raikhman G.O. |
Author´s information | Research – R&D Division of All Trade Recycling Ltd, Petah Tikva, Israel Kogan V.S, Ph.D., Chem., R&D Division Manager, Vladimir@atrecycling.com Raikhman G.O., director of company |
Summary | The extraction of tin (IV) by Cyanex 923 and Alamine 336 from acidic chloride solution has been investigated. A mixture of tertiary amines extracts tin (IV) in a single step by 94.3 % under the conditions: [H2SO4] = 1.0 mol/dm3, [KCl] = 1,5 -2,5 mol / dm3 and phases ratio A/O = 5. Wherein lead transfer into the organic phase was only 11-12 %. 4 mol/dm3 solution of Cyanex 923 in Solvesso 100 at 1,0 mol/dm3 H2SO4 and 2,50 mol/dm3 KCl extracts in a single step 94-97% of tin(IV) and 32-34 % of lead. It was shown that liquid-liquid extraction using Alamine 336 and Cyanex 923 can be used for selective extraction of tin from productive solutions after hydrometallurgical pretreatment of electronic scrap. Well stripping agent for tin reextraction from Cyanex 923 saturated solution is a sodium hydroxide solution with a concentration of 2,54 mol/dm3. It was established that by tin electrowinning from an alkaline reextract may be recovered cathode metal purity 97,73% without any traces of lead. |
Key words | liquid-liquid extraction, tin (IV), hydrometallurgy, electronic scrap, tin electrowinning. |
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Memorable dates
To 80 age memory of Doctor of technical sciences, professor, winner of USSR state premium in the field of science and technics Noyan Akhmed’yarovich Bajtenev
To 80 age memory of Doctor of technical sciences, professor, winner of USSR state premium in the field of science and technics Noyan Akhmed’yarovich Bajtenev