Mining
Lis S.N., Varekha G.P., Musin R.A.Self-organization of massif around vesicle
Title | Self-organization of massif around vesicle |
Authors | Lis S.N., Varekha G.P., Musin R.A. |
Author´s information | «Institute of the problems for deposits complex development» LTD, Karaganda Lis S.N., senior scientific worker, snlis@yandex.kz Varekha G.P., Cand.Tech.Sci., head of lab Musin R.A., scientific worker, Gambit_12@mail.ru |
Summary | Сomplicated systems are able to self-organization in the type of ring periodic structure. Self-organization appears when system is thermodynamically open. So presence of some marginal conditions is necessary as factor during periodic structures formation. Self-organization of massif around the vesicle is natural phenomenon consisting in rearrangement of tension inside massif, caused by formation of cave (heterogeneity) inside of it, so that quasiclosed subsystem is formed. Process of rearrangement of tension creates frame round of cave, this is self-organizing protective subsystem, for protection of massif and vesicle from further destruction. Phenomenon of massif self-organization around of cave is wave process of slow damped autooscillations. Kinetic energy of extending rock is energy of these oscillations. Around of mine working with any size of section there is self-organized protective frame, which by resistance is equal to the tension of virgin massif. Self-organization of protective frame around mine roadway can be achieved artificially by usage of step yielding of support. Every step of yielding forms next frame with more bearing capacity. For realization of this idea step yielding assembly for sling anchoring in the form of deformable sleeves was developed. |
Key words | massif self-organization, autooscillations; tension rearrangement; protective frame; step yielding |
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Metallurgy
Boginskaya A.S., Petrov G.V., Boduen A.Ya., Mardar I.I.Current condition of refractory gold ores processing and prospects of its development
Title | Current condition of refractory gold ores processing and prospects of its development |
Authors | Boginskaya A.S., Petrov G.V., Boduen A.Ya., Mardar I.I. |
Author´s information |
National mineral resources university “Mining”, St. Petersburg, Russia Boginskaya A.S., Ph.D student, kina_fora@mail.ru Petrov G.V., Dr. Tech.Sci., professor, petroffg@yandex.ru Boduen A.Ya., docent, bodyen-anna@mail.ru |
Mardar I.I., Ph.D student, ilinaira89@mail.ru | |
Summary | Contemporary methods of gold extraction from refractory ores including roasting process, bacterial oxidation and autoclave oxidation were considered. Prospects of development of gold industry are formulated. Advantages and disadvantages each of methods were analyzed. For choosing the most effective and ecological friendly method of refining of refractory ores main technologies were compared. The main parameters of plants that realize these technologies are shown. Tasks for future effective work of gold industry are stated. As a result the method of autoclave oxidative leaching was presented as the most effective and perspective method of refining of gold ores. It is breakeven, ecological and characterized by high level of gold recovery from ores and less requirements for pretreatment. |
Key words | refractory gold ores, autoclave oxidation, bioleaching, oxidative roasting |
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Vorobyev A.Ye., Zubkov A,A, Moldabayeva G.Zh.
Title | Theoretical bases of ecologically pure processings of hard-cleaning mineral raw materials and solutions |
Authors | Vorobyev A.Ye., Zubkov A,A, Moldabayeva G.Zh, |
Author´s information |
Russian university of friendship nations, Russia, Moscow Vorobyev A.Ye., Dr.Tech.Sci., professor, head of cathedra of oil development geology, oil-and-gas and mining, fogel_al@mail.ru Zubkov A.A., Cand.Tech.Sci. Mining Institute named after D.A. Kunayev, Almaty Moldabayeva G.Zh,, Dr.Tech.Sci., main scientific worker |
Summary | The accumulated waste under climatic influence and an atmospheric precipitation turns into the beastly focus of environment pollution; at the same time it is a potential source of the metals which stocks are comparable with large-scale natural deposits. New conceptual approach and essentially new processing methods were developed for solving existing environmental and raw materials problems. It is offered to integrate roasting and an autoclave leaching of technogenic and complex natural mineral raw materials (oxidized and poor sulphide) into united, consecutive and continuous process according to the scheme “all into solution – one by one from solution”. In most cases it is economically expedient to process initial raw materials in the georeactor (the reactor of new generation) without preliminary preparation, and in certain cases to use poor collective concentrates. The laboratory and semi-industrial researches, which have been carried out at Haydarkansky mercury metallurgical plant, show high efficiency of a floatation method for mercury extraction from sewage by mercapto thiozoly (captacsy) and availability of its use. |
Key words | mineral raw materials, metallurgy, processing, ecology, solution |
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Kovzalenko V.A., Sadykov N. M.-K., Myltykbayeva L.A., Abdulvalieyv R.A., Gladyshev S.V., Pozmogov V.A.Complex processing of quartz ore by fluoride method
Title | Complex processing of quartz ore by fluoride method |
Authors | Kovzalenko V.A., Sadykov N. M.-K., Myltykbayeva L.A., Abdulvalieyv 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 Myltykbayeva L.A., Cand.Tech.Sci., vice-president of «Parasat» JSC Abdulvalieyv 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 |
Summary | Studies to determine the chemical, roentgen-phase and mineralogical composition of high-silicon alumina were conducted. The process of sintering of aluminosilicate materials with ammonium bifluoride, contributing to the separation of raw materials to the gas phase in the form of ammonium fluorosilicate and aluminum fluoride, concentrated in the solid phase of sinter was investigated. Apparatus for charge sintering consisting of high-temperature electric furnace, steel reactor with gas offtake tube and the vapour condenser was mounted. The optimum technological conditions of the sintering process: temperature, duration, ratio of high-silicon aluminous raw material to fluorinating reagent were determined. It is established, that formation of amorphous silica takes place at interaction of solutions of ammonium hexafluorine silicate with ammonia, and use of ammonia concentrated solution is more optimal in this case. The cake autoclave leaching technological regime was determined and results of alumina recovery are presented |
Key words | quartz ore, ammonium bifluoride, sintering, ammonium hexafluorine silicate, autoclave leaching, alumina, amorphous silica |
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Surkova T.Yu., Dulenin A.P., Barmenshinova M.B., Yulusov S.B., Beisakhmetov D.A.Concomitant molybdenum recovery at processing of uranium-containing sub-standard ores
Title | Concomitant molybdenum recovery at processing of uranium-containing sub-standard ores |
Authors | Surkova T.Yu., Dulenin A.P., Barmenshinova M.B., Yulusov S.B., Beisakhmetov D.A. |
Author´s information |
“Center of Earth sciences, metallurgy and ore benefication” JSC, Almaty, Lab of noble metals Surkova T.Yu., Cand.Tech.Sci., deputy head of lab., tu-surkova@mail.ru Yulusov S.B., junior scientific worker Beisakhmetov D.A., engineer “Stepnogorsk mining – chemical plant” LTD |
Dulenin A.P., head of lab Kazakh National Technical University named after K.I. Satpayev Barmenshinova M.B., Cand.Tech.Sci. |
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Summary | In weak-acid solutions molybdenum is in the polyanion form and absorbed on the anion exchangers from these mediums with higher efficiency than from the carbonate and neutral solutions. We studied the dependence of the sorption capacity of resin A-500 on solution pH in the value range from 1 to 7. It was found that molybdenum is most efficiently adsorbed at pH 4.0-5.0. In the given interval leaching of the ore can transfer 70-80% of molybdenum into a solution, the remaining one is leached together with uranium at pH 2.4-2.6. In order to find the parameters of the alkaline-chloride molybdenum desorption, kinetics of the process was determined in comparison with currently used in the production soda-chloride environment. It is found that alkali chloride solutions have a higher rate of molybdenum desorption in comparison with soda-chloride solutions. Molybdenum is more fully eluted at sodium chloride concentrations in the solution above 30 g/dm3. The optimum concentration of alkali in the eluting solvent should be considered as 30-40 g/dm3. |
Key words | molybdenum, uraniferous off-grade ore, sorption, desorption, ionite |
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Ultarakova A.A., Naimanbaev М.А., Onaev M.I., Ulasyuk S.M., Alzhanbayeva N.Sh.Research on cleaning of solutions suitable for synthesis of carnallite
Title | Research on cleaning of solutions suitable for synthesis of carnallite |
Authors | Ultarakova A.A., Naimanbaev М.А., Onaev M.I., Ulasyuk S.M., Alzhanbayeva N.Sh. |
Author´s information |
“Center of Earth sciences, metallurgy and ore benefication” JSC, Almaty, Lab of titanium and rare refractory metals Ul’tarakova A.A., Cand.Tech.Sci., scientific worker, ult.alma@mail.ru Naimanbaev М.А., Cand.Tech.Sci., head of lab, madali_2011@inbox.ru Onaev M.I., Cand.Tech.Sci., leading scientific worker Ulasyuk S.M., scientific worker Alzhanbayeva N.Sh., leading engineer |
Summary | Results of studies on leaching of waste melt of titanium chlorinator (WMTC) by water showed that with increase of ratio S:L the filtration improves and extraction of potassium and magnesium salts into a solution increases. At WMTC leaching by solutions of a hydrochloric acid with increase of its concentration the content of impurities in the solution increases that negatively affects on further solution clearing. According to results of researches on leaching of slimes of magnesium production by solutions of hydrochloric acid with various concentration it has been shown, that with increasing hydrochloric acid concentration extraction of magnesium into a solution increases up to 54%. Slimes of magnesium production were used as reagents to impurity precipitate from solutions after leaching of chloride wastes of titanium-magnesium production. The best purification of solutions after WMTC leaching takes place at addition of carnallite scheme’s magnesium electrolyzer slime (CSMES) with size 1+0,5 mm and continuous refinement furnace’s slime (CRFS) with size 2+0,5 mm. The solutions were more purified from foreign components at joint leaching of WMTC with CRFS. An optimum percentage ratio was determined WMTC:CRFS = 70:30. Stoichiometric ratio KCl/MgCl2 in the solution in this case was 3,76. |
Key words | synthetic carnallite, solid chloride waste, leaching, potassium chloride, magnesium chloride, titanium and magnesium production. |
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Shoinbayev A.T., Yar-Mukhamedova G.Sh., Kasymzhanov K.K., Babazhanov D.R., Barkytova B.N.Kinetic study of autoclave-carbonate discomposition of scheelite concentrates
Title | Kinetic study of autoclave-carbonate discomposition of scheelite concentrates |
Authors | Shoinbayev A.T., Yar-Mukhamedova G.Sh., Kasymzhanov K.K., Babazhanov D.R., Barkytova B.N. |
Author´s information |
“Center of Earth sciences, metallurgy and ore benefication” JSC, Almaty, Lab of titanium and rare refractory metals Shoinbayev A.T., Dr. Tech.Sci., head of sector Yar-Mukhamedova G.Sh., Dr.Phys.Math..Sci, professor, chief scientific worker, gulmira-alma-ata@mail.ru Kasymzhanov K.K., junior scientific worker Babazhanov D.R., engineer Barkytova B.N., engineer |
Summary | In the article results of kinetic studies of autoclave-carbonate discomposition of scheelite concentrates are presented. Studies were carried out in temperature range of 368-523 K, at mixing speed of 100-400 revolutions per minute. Sodium carbonate solutions, mol/dm3: 0.5, 0.75, 1.0, 1.25, 1.5 were used for determine the dependence of tungsten leaching from scheelite on solution concentration. It was established, that at increasing concentration of sodium carbonate degree of leaching increases and at a concentration of 1.5 – 2.0 mol/dm3 it is achieved rapid, within 45 – 60 minutes (82,3-90,2%), and the almost complete (95,2-99,3%) leaching of tungsten in 2 hours. The kinetic mode was registered for WO3 and Na2CO3 solution interaction. In this case there is practically no concentration gradient of sodium carbonate at an oxide surface. Obviously, that increase of hydrolysis takes place due to previous hydration of oxides surface at their reaction with a reagent-solvent. In the sorbed water molecules weakening of intramolecular bonds occurs due to their interaction with the oxide surface, thereby hydrolysis of coming to the hydrated surface СО32- oxide ions flows more fully. |
Key words | scheelite, autoclave decomposition, tungsten, concentrate, sodium carbonate, kinetics |
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Physical-chemical investigations
Kasenova Sh.B., Sagintayeva Zh.I., Kasenov B.K., Kuanyshbyekov Ye.Ye., Syeisyenova A.A., Smagulova D.I.Roentgenography and spectroscopy of new nanostructured particles of cuprate маnganites LaMg
Title | Roentgenography and spectroscopy of new nanostructured particles of cuprate маnganites LaMg2CuMnO6 and LaCa2CuMnO6 |
Authors | Kasenova Sh.B., Sagintayeva Zh.I., Kasenov B.K., Kuanyshbyekov Ye.Ye., Syeisyenova A.A., Smagulova D.I. |
Author´s information |
Chemical and Metallurgical Institute named after J. Abishev, Karaganda Kassenova Sh.B., Dr.Chem.Sci., chief scientific worker Sagintayeva Zh. I., Cand.Chem.Sci., leading scientific worker Kassenov B.K., Dr.Chem.Sci., head of thermochemical processes lab, kasenov1946@mail.ru Kuanyshbekov E.E., engineer Syeisyenova A.A., engineer Seisenova A.A., engineer Smagulova D.I., senior laboratorian |
Summary | Cuprate manganites with composition LaMII2CuMnO6 (MII – Mg, Ca) were synthesized by high temperature solid phase interaction of lanthanum oxides, copper (II), manganese (III) and alkali metals carbonates Their nanostructured particles were obtained with the use of a vibration mill. The particles dimensions are determined by an electron microscope. It is established by cuprate manganites radiographs indexing that all of them are crystallized in the cubic system with the following lattice parameters: LaMg2CuMnO6 – a = 15,523 ± 0,033 Å, Z = 6, V0 = 3740,48 ± 0,10 Å3, V0el.yach. = 623,41 ± 0,03 Å3, ρrent. = 5.81, ρpikn. = 5,75 ± 0,06 g/cm3; LaCa2CuMnO6 – a = 15,422 ± 0,058 Å, Z = 4, V0 = 3667,94 ± 0,174 Å3, V0el.yach. = 916,48 ± 0,04 g/cm3, ρrent. = 3.77, ρpikn. = 3,72 ± 0,05 g/cm3. The data of IR spectroscopic studies of the cuprate-manganites are presented. |
Key words | high-temperature solid phase synthesis, roentgenography, crystal system, spectroscopy, cuprate manganite, nanostructure |
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Turdukozhayeva A.M., Fedorovich Ya.A., Malyshev V.P., Suleimenov T., Kazhikenova A.Sh.Cluster and associate model of temperature dependence of liquid boron oxide viscosity
Title | Cluster and associate model of temperature dependence of liquid boron oxide viscosity |
Authors | Turdukozhayeva A.M., Fedorovich Ya.A., Malyshev V.P., Suleimenov T., Kazhikenova A.Sh. |
Author´s information |
Chemical and Metallurgical Institute named after Zh. Abishev, Karaganda, Lab of entropic information analysis Turdukozhayeva A.M., Dr. Tech.Sci., chief scientific worker, eia_hmi@mail.ru Fedorovich Ya.A., laboratorian Malyshev V.P., Dr. Tech.Sci., head of lab L.N. Gumilyeov Eurasian National University, Astana Suleimenov T., Dr.Chem.Sci, professor Karaganda State University named after E.A. Buketov Kazhikenova A.Sh., Cand.Tech.Sci., docent |
Summary | Developed by the authors cluster and associate model of viscous fluid flow was used to determine the temperature dependence of the dynamic viscosity of boron oxide. The obtained equation adequately describes the experimental data presented for the two states of matter: “immediately after melting” and “dried melt.” For the case with dried boron oxide decrease of dependence of the dynamic viscosity on temperature, as well as the degree of association are regular. For boron oxide with residual moisture in initial substance the increase of temperature dependence of the degree of clusters association background dynamic viscosity is observed. It may indicate a transformation of the linear or grid structure of associates, typical for glasses, into a round, and as result the internal friction in the fluid in whole and the viscosity are reduced. Cluster and associate model of the temperature dependence of the dynamic viscosity of boron oxide allows predict the behavior of this characteristic in the melting and boiling point. |
Key words | viscosity, boron oxide, cluster, associate, melt, temperature |
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Investigation of electrochemical processes
Ibishev K.S., Bekturganov N.S., Belyayev S.V., Kargina N.A., Bukharitsyn V.O.Electrodeposition of nano-sized copper powder in the mode of combination of stationary electrolysis with the high voltage impulse discharge
Title | Electrodeposition of nano-sized copper powder in the mode of combination of stationary electrolysis with the high voltage impulse discharge |
Authors | Ibishev K.S., Bekturganov N.S., Belyayev S.V., Kargina N.A., Bukharitsyn V.O. |
Author´s information |
Chemical and Metallurgical Institute named after Zh. Abishev, Karaganda Ibishev K.S., Cand.Tech.Sci., leading scientific worker Bekturganov N.S., Dr. Tech.Sci., academician of Kazhakhstan Republic NAS Belyayev S.V., Dr. Tech.Sci., head of lab, sbel-07@mail.ru Kargina N.A., Cand.Tech.Sci., leading scientific worker Bukharitsyn V.O., senior scientific worker |
Summary | A fundamentally new electrochemical method for the synthesis of nano-sized powders of copper was developed. For the implementation of the method the special laboratory high-voltage impulse apparatus was designed and constructed, which allows to carry out the process at the simultaneous action of a constant electric current and high-voltage impulse discharge. The study was performed by the method of multi-factorial planning of experiment. The influence of current density, concentration of sulfuric acid, electrolysis time and the magnitude of the high voltage current on the value of nano-sized copper powder output at electrochemical deposition were studied. The experimental data were mathematically processed to obtain partial dependences for every studied factor. On the basis of private dependences, the probabilistic-deterministic model of the process was obtained, which was used to determine the optimal parameters of electrolysis. It was shown that under these conditions the highest value of the current output equal to 89.45% can be obtained at a current density of 8000 mA/cm2, the duration of process – 12 min, the concentration of sulfuric acid – 80 g/l, the value of the voltage – 12 kV. The resulting copper powder was identified by the methods of chemical analysis and X-ray diffraction, and electron microscopy. The copper content in the powder was 99.7%. The particle size of the copper powder ranges between 25 and 68 nm. |
Key words | high-voltage pulsed discharge, electrolysis, multifactorial experiment, current efficiency, nanoscale powder, copper, electrolyte. |
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Inorganic materials
Dubinina Ye.S., Adyrbayeva T.A., Yesimov B.O., Sulyeimenov Zh.T.Porcelain based on ceramic mineral raw material of Kazakhstan Republic
Title | Porcelain based on ceramic mineral raw material of Kazakhstan Republic |
Authors | Dubinina Ye.S., Adyrbayeva T.A., Yesimov B.O., Sulyeimenov Zh.T. |
Author´s information |
Southern Kazakhstan state university named after M. Auezov, Shymkent Dubinina Ye.S., Cand.Tech.Sci., lecturer Adyrbayeva T.A., Cand.Tech.Sci., docent, tatianaadyrbaeva@mail.ru Yesimov B.O., Dr. Geol.-Miner.Sci., professor Sulyeimenov Zh.T., Dr.Tech.Sci., academician of Kazhakhstan Republic NAS |
Summary | The researches on chemical and mineralogical structure, physical and mechanical properties of technological samples of following minerals: kaolins, white-burning clays, silica sands, feldspars, quartzites and chalk, selected at the deposits Souzny, Berlinsky, Mugojar, Sarybulak, Grunch-Bulak and Shetpe are carried out. Сompositions and technology for production of import-substituting porcelain, and based on them process flowsheet of porcelain production are developed with using the above listed ceramic minerals from domestic deposits. On the basis of the developed substance pilot batch of porcelain was produced. The complex studies of chemical and mineralogical structure, physical and mechanical properties of the porcelain substance compositions on the basis of domestic ceramic mineral products were conducted. The developed compositions of porcelain substances differ from traditional by fewer kinds of raw materials, have a lower sintering temperature, a favorable ratio of crystalline and glassy phases in porcelain shards, a greater degree of mullitization and, as a consequence, possess high physical and mechanical properties. |
Key words | porcelain, glaze, ceramic substance, kaolin, clay, quartz sands, feldspar |
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Yesimov B.O., Adyrbayeva T.A., Zhakipbayev B.Ye.Alternative foam material based on silica clay minerals
Title | Alternative foam material based on silica clay minerals |
Authors | Yesimov B.O., Adyrbayeva T.A., Zhakipbayev B.Ye. |
Author´s information |
Southern Kazakhstan state university named after M. Auezov, Shymkent Yesimov B.O., Dr. Geol.-Miner. Sci., professor Adyrbayeva T.A., Cand.Tech.Sci., docent, tatianaadyrbaeva@mail.ru Zhakipbayev B.Ye., PhD student |
Summary | The possibility of obtaining heat-insulated foam material on the basis of highly siliceous silica clay rocks, excluding energy-intensive and economically inefficient processes of boiling and granulation of special foam glass mass from the traditional technology, is discussed. It is established, that silica clays, previously related to be cryptocrystalline, in fact are kind of siliceous rock composed from tiny beads, which are in turn are composed from rounded droplets of amorphous silica with microlevel size. Identified substantial and structural characteristics of the researched silica clays, as well as known high reactivity of amorphous silica became the basis for the carrying out these experiments on synthesis of the foam material. The processes of sintering occurring during heat treatment at obtaining foam glass were studied. The nature of effect of the initial silica clay powders dispersibility and time-temperature conditions of heat treatment on structure and properties of obtained material was shown. The optimum concentration of sodium hydroxide (13%), which provides formation of foaming amorphous mass from silica clay in the process of heat treatment, was determined. |
Key words | heat-insulated material, foam glass, silica clay, sodium hydroxide, gasifier, heat treatment |
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Industrial waste utilization
Nadyrbekov A.K., Khassen B.P., Dakhno L.A., Lis S.N., Smolenkov Yu.Yu.Research on mineralogical composition of wastes of ferrochrome production
Title | Research on mineralogical composition of wastes of ferrochrome production |
Authors | Nadyrbekov A.K., Khassen B.P., Dakhno L.A., Lis S.N., Smolenkov Yu.Yu. |
Author´s information |
«Institute of the problems for deposits complex development» LTD, Karaganda Nadyrbekov A.K., Cand.Tech.Sci., head of lab Khassen B.P., Cand.Tech.Sci., director Lis S.N., senior scientific worker Smolenkov Yu.Yu., junior scientific worker Karaganda state technical university Dakhno L.A., Cand.Tech.Sci., docent |
Summary | One of the trends in the production of mineral binding materials is the use of natural and man-made additives. At the present time it is known that the granulated blast furnace slag is used for obtaining slag-Portland cement in the construction industry. This technology is resource-saving. This paper considers a possibility of using waste of the refined and high-carbon ferrochrome production, as well as baghouse dust of gas cleaning as additives of technogenic origin to mineral and slag-alkaline binders in the production of building materials. The effectiveness of such additive is determined by the presence inside it minerals possessing a high hydraulic activity and sufficient strength. A mineralogical composition of slag from the ferroalloy production has been investigated in order to identify minerals possessing hydraulic activity. The results of the micro-X-ray spectral and X-ray phase analyses of slag from the refined and high-carbon ferrochrome production as well as baghouse dust from gas cleaning are given in the paper. The research results showed that minerals possessing hydraulic activity are absent in slag and baghouse dust. It is recommended to use of wastes of the ferrochrome production with application of alkaline and sulfate activating agents. |
Key words | ferrochrome production slag; baghouse dust; mineralogical composition; phase composition, mineral binding materials |
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Semenchenko G.V., Magomedov D.R., Abubakriyev A.T.Testing of bioleaching use at noble metals recovery from dumps of Akbakaj gold extracting factory
Title | testing of bioleaching use at noble metals recovery from dumps of Akbakaj gold extracting factory |
Authors | Semenchenko G.V., Magomedov D.R., Abubakriyev A.T. |
Author´s information |
“Center of Earth sciences, metallurgy and ore benefication” JSC, Almaty, Lab of noble metals Semenchenko G.V., Cand.Biol.Sci., leading scientific worker, ao.cnzmo@rambler.ru Magomedov D.R., engineer Abubakriyev A.T., engineer |
Summary | Investigations on gold biochemical leaching from gold extracting factory dumps by populations of lithotrophic bacteria are carried out. Advantage of preliminary processing of dumps with the mixed culture of acidophilic (Acidithiobacillus ferrooxidans) and heterotrophic (Pseudomonas aureofaciens) bacteria is shown. The optimum ratio of species of bacteria, duration of preprocessing and the effective leaching solution are determined. Influence of dumps crushing degree on a noble metals extraction is investigated. The technology allows taking from dumps more than 90 % of gold. The basic advantages of the offered method are its simplicity and efficiency. Processing of toxic production wastes will allow considerable reducing anthropogenous pressure to environment as well. |
Key words | bioleaching, noble metals, acidophilic bacteria, heterotrophic bacteria |
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