Электронный каталог

38.3
S70
Sokolova, Ya. А.
    The study of the properties and structure of cement binding composition on electrolyte acqueous solutions activated by mechanomagnetic method. [Текст] / Ya. А. Sokolova, M. V. Akulova, B. R. Isakulov, А. G. Sokolova [et al.] // News of national academy of sciences of the republic of Kazakhstan. . - 2021. - №2. - P. 86-91
ББК 38.3

Рубрики: Строительные материалы

Кл.слова (ненормированные):
Cement compositions, -- mechanomagnetic activation -- electrolyte aqueous solutions -- differential thermo gravimetric analysis -- compressive strength -- structure formation of binders -- sodium thiosulphate -- calcium chloride
Аннотация: In the present paper, the issues of studying the influence of complex activation of grouting fluid on the structure and properties of the hardened cement paste and concrete are considered. The problem is relevant for manufacturing of building materials. In the paper, there was used the method of applying in the concrete mix composition of the elementary chemical substances undergone special physical treatment by means of mechanomagnetic activation. For more profound study of the structure formation processes in the hardened cement paste, the method of differential thermo gravimetric analysis has been used. As the research results have shown, the concrete samples on the activated electrolyte solutions are characterized by improved strength. In addition, on the base of differential thermo gravimetric analysis, it was proven that in the studied samples of the hardened cement paste on the electrolyte solutions activated by the method of mechanomagnetic treatment, the less calcium hydroxide and the more hydrated calcium silicate with amorphous and fine crystalline is formed. The obtained results for cement composites could be applied when manufacturing effective binder for concretes and mortars in the production of building materials and structures.
Держатели документа:
WKU
Доп.точки доступа:
Akulova, M.V.
Isakulov, B.R.
Sokolova, А.G.
Kul’sharov, B.B.
Isakulov, А.B.

26.3
S14
Safarov, R. Z.
    Elemental analysis of local and foreign raw materials for the production of trimanganese tetraoxide pigment. [Текст] / R. Z. Safarov, A. Zhandildenova, D. B. Kargin, B. B. Makhmutov [и др.] // News of national academy of sciences of the republic of Kazakhstan. . - 2021. - №2. - P. 92-98
ББК 26.3

Рубрики: geology

Кл.слова (ненормированные):
hausmannite -- pigment -- manganese ore -- nanopowders -- electronic microscopy -- energy-dispersive analysis
Аннотация: In the course of continuation of scientific research in the development of Kazakhstani technology for the production of trimanganese tetraoxide pigment, there have been proposed new methods of analysis which make it possible to investigate new nanostructural materials sourced from local deposits. The results obtained are of practical importance and serve as the foundation for developing new technologically advanced domestic production of a competitive product that is in demand both on the national and international markets. The available methods are not able to highlight the particularity and diversity of Kazakhstani manganese ores due to the uneven distribution of manganese minerals and host (waste) rock, the quantitative ratio of rock-forming components and their variation instability. Methods of energy-dispersive analysis of manganese ores from Kazakhstani Zhaksylyk and Bogach deposits have been put forward, electronic micrographs, spectrograms of samples, diagrams of normalized distribution of elements on the surface of samples have been obtained and a comparative analysis with raw analogue samples of some foreign manufacturers has been performed.
Держатели документа:
WKU
Доп.точки доступа:
Zhandildenova, A.
Kargin, D. B.
Makhmutov, B. B.
Kamatov, R. M.
Shomanova, Zh. K.

24
I-54
Ilyassov, A. E.
    Investigation of the sorption characteristics of activated carbons. [Текст] / A. E. Ilyassov, A.О. Baikonurova, B. N. Surimbayev // News of national academy of sciences of the republic of Kazakhstan. . - 2021. - №2. - P. 105-109
ББК 24

Рубрики: chemistry

Кл.слова (ненормированные):
activated carbon -- sorption -- sorption capacity of coal -- sorbent -- gold
Аннотация: The article presents the results of a comparison of the sorption characteristics for gold of crushed activated carbon of the foreign Haycarb brand, obtained from expensive raw materials - coconut shells, and crushed activated carbon of the domestic Shubarkol brand, obtained from relatively cheap raw materials - low-ash coking coal. The activated carbon Shubarkol crushed to a class of -3.6+1.0 mm, was produced in Kazakhstan from coking coal by Shubarkolkomir JSC.
Держатели документа:
WKU
Доп.точки доступа:
Baikonurova, A.О.
Surimbayev, B.N.

36
T91
Tuleshova, Z.
    Investigation of the composition of polyphenolic substances of the juice from artichoke tubers. [Текст] / Z. Tuleshova, G. I. Baigazieva, E. Askarbekov // News of national academy of sciences of the republic of Kazakhstan. . - 2021. - №2. - P. 142-148
ББК 36

Рубрики: Пищевые производства

Кл.слова (ненормированные):
jerusalem artichoke -- chemical composition -- nutritional value -- polyphenolic substances
Аннотация: In this article, the chemical composition of tubers and juice-semi-finished products from jerusalem artichoke is investigated. The results of the studies showed that the bulk of the dry substances in jerusalem artichoke tubers are carbohydrates, most of which are represented by fructosides. In the semi-finished juice passes: oligosaccharides 22.54 %, monosaccharides 1.61%, as well as part of the structural polysaccharides-fiber 0.07 %, pectin substances 1.84 %.
Держатели документа:
WKU
Доп.точки доступа:
Baigazieva, G.I.
Askarbekov, E.

35
R18
Rakhimberlinova, Zh. B.
    Chemical activation of the surface of the burnt rock by various modifiers. [Текст] / Zh. B. Rakhimberlinova, I. V. Kulakov, A.Zh. Alimzhanova, M. М. Mussirepov, N. E. Nakypbekova // News of national academy of sciences of the republic of Kazakhstan. . - 2021. - №3. - P. 81-86
ББК 35

Рубрики: chemical Technology

Кл.слова (ненормированные):
oxidized coals -- humic acids -- inorganic surfaces -- burnt rock -- host rock -- modifiers
Аннотация: This article presents the results of experimental studies of the process of grafting humic acids and their functional derivatives on modified and unmodified surfaces of burnt rock. It is shown that the inoculation of humic acids on inorganic carriers is more successful with the preliminary activation of the surface of burnt rocks.
Держатели документа:
WKU
Доп.точки доступа:
Kulakov, I.V.
Alimzhanova, A.Zh.
Mussirepov, M.М.
Nakypbekova, N.E.

35
A29
Akurpekova, A. K.
    Cracking of vacuum gas oil on hlay -containing catalysts with a multicomponent matrix based on montmorilionite. [Текст] / A. K. Akurpekova // News of national academy of sciences of the republic of Kazakhstan. . - 2021. - №4. - P. 6-13
ББК 35

Рубрики: chemical Technology

Кл.слова (ненормированные):
catalytic cracking -- montmorillonite -- binder -- strength -- gasoline -- zeolite -- acidity -- acuum gas oil
Аннотация: it is shown that additions of montmorillonite in the Na form contribute to a significant increase in the crushing strength of granules of cracking catalysts while maintaining their activity in the yield of gasoline. Comparison of the results of the cracking of vacuum gas oil on catalysts of the same composition, but with and without a NaMM binder, showed that the introduction of NaMM does not significantly affect the gasoline yield. Samples of catalysts of the same composition, but with the use of Al-pillared MM in Na-and CaNa-exchangeable forms and with the addition of NaMM as a binder, showed similar activity in the yield of gasoline, which is explained by the similarity of the elemental compositions, textural and acidic properties of the studied catalysts. The maximum yield of gasoline, equal to 44.8% and light gas oil of 14.6%, was obtained for Al (2.5) CaNaHMM + NaMM with the addition of a binder and crushing strength of 60-70 N / cm2.
Держатели документа:
WKU
Доп.точки доступа:
Zakarina, N.A.
Kornaukhova, N.A.
Dalelkhanuly, O.
Zhumadullaev, D.A.

24
Z63
Zhumabek, M.
    Ni-Al-Mg-Mn composite catalysts for partial oxidation of natural gas. [Текст] / M. Zhumabek, G. N. Kaumenova, A. Manabayeva, R. O. Sarsenova, S. O. Kotov // News of national academy of sciences of the republic of Kazakhstan. . - 2021. - №4. - P. 19-26
ББК 24

Рубрики: chemistry

Кл.слова (ненормированные):
catalytic oxidation -- methane -- synthesis-gas -- nickel -- magnesium
Аннотация: the problem of rational utilization of natural and associated petroleum gases and the cessation of their flaring is one of the acute and unresolved environmental problems. The aim of this work is to develop effective thermally stable catalysts ofa new generation for the processes of oxidative conversion of light alkanes of natural and associated gas into synthesis gas. The results of partial oxidation of the methane of natural gas on the catalysts prepared by solution combustion synthesis are presented. Investigation of the activity of catalysts produced from initial mixture of Ni(NO3)2-Al(NO3)3-Mg(NO3)2-Mn(NO3)2+ urea of different composition was carried out for the production of synthesis-gas. It was found that the optimal conditions for producing of synthesis-gas are: CH4conversion higher than 95%, yield of target products: Н2-97 -99% and СО -40 -43%, Т = 900оС, space velocity –2500 and 6500 h-1. The catalysts were studied by X-ray diffraction, transmission electron microscopy, specific surface area, pore volume and average pore diameter. The presence in the catalysts of simple and mixed oxides, metal aluminates and spinel-type structures, the presence of which contributes to the active work of catalysts for oxidativeconversion of CH4, has been established.
Держатели документа:
WKU
Доп.точки доступа:
Kaumenova, G.N.
Manabayeva, A.
Sarsenova, R.O.
Kotov, S.O.

35
M23
Mammedov, K.
    Application of new corrosion inhibitor foroilfield equipment and pipelines for improving the ecological security. [Текст] / K. Mammedov // News of national academy of sciences of the republic of Kazakhstan. . - 2021. - №4. - P. 32-39
ББК 35

Рубрики: chemical Technology

Кл.слова (ненормированные):
environment -- complex reagent -- pipeline -- aggressive environment -- corrosion -- cavitation -- viscosity -- paraffin deposition
Аннотация: n addition, to increase the viscosity reduction efficiency of the obtained reagent, the mechanism of complex application of the cavitation process and the reagent was described based on the positive results of the experiments. Also, the results of tests via "cold finger" method showed that new reagent has 53% efficiency in paraffin deposition inhibiting at its optimal anti-corrosion concentration (500 mg /l).As a result of the conducted field tests, it was revealed that theuse of the new multifunctional reagent ensures the continuous operation of pipeline network and reliable environmental protection.
Держатели документа:
WKU
Доп.точки доступа:
Aliyev , S.
Nurullayev, V.

35
M97
Musina, G. N.
    Processing of coal tar into petrochemicals and fuel products. [Текст] / G. N. Musina // News of national academy of sciences of the republic of Kazakhstan. . - 2021. - №4. - P. 40-47
ББК 35

Рубрики: chemical Technology

Кл.слова (ненормированные):
coal -- hydrogenation -- peat -- cavitation -- petrochemicals -- fuels -- resin -- phenol
Аннотация: the article summarizes the results of the research. The influence of cavitation-wave action on coal tar, which leads to a change in the rheological properties (density, viscosity), as a result of an increase in the yield of light and medium fractions, is investigated, and the process of catalytic hydrogenation of coal in the presence of a catalytic additive and mine methane is studied.
Держатели документа:
WKU
Доп.точки доступа:
Takibayeva, A.T.
Kulakov, I.V.
Zhorabek, A.A.
Shakhmetova, G.A.

26.3
N92

    Numerical modeling of the stress-strain state of the Kurzhunkul open-pit mine [Текст] / S. А. Sedina, N. O. Berdinova, G. B. Abdikarimova [и др.] // Известия Национальной Академии наук Республики Казахстан. - 2021. - №6. - Р. 110-117
ББК 26.3

Рубрики: Геология

Кл.слова (ненормированные):
напряжённо-деформированное состояние -- карьер -- распределение главных напряжений -- устойчивость массива -- двухмерная численная модель
Аннотация: Напряженно-деформированное состояние горных РїРѕСЂРѕРґ является РѕРґРЅРёРј РёР· главных факторов, определяющих величину Рё характер РіРѕСЂРЅРѕРіРѕ давления, РѕС‚ которого зависит безопасность разработки глубоких карьеров. РџСЂРё ведении горных работ необходимо понимание, РіРґРµ Р±СѓРґСѓС‚ формироваться Р·РѕРЅС‹ повышенных главных компонент нормальных Рё максимальных касательных напряжений. Р’ статье приведены результаты численного моделирования напряженно-деформированного состояния Куржункульского карьера РІ двухмерной постановке методом конечных элементов РІ программном комплексе MIDAS GTS NX. РџСЂРё математическом моделировании были учтены реально действующие РІ массиве напряжения, определенные натурными измерениями. Приведена модель, основанная РЅР° результатах моделирования, которую возможно применять для прогнозирования изменения максимального градиента горизонтального напряжения СЃ увеличением глубины отработки Куржункульского карьера. РџРѕ итогам моделирования бортов РІ СЋРіРѕ-восточном северо-западном направлениях были определены участки, РіРґРµ наблюдается неблагоприятное воздействие максимальных касательных напряжений РЅР° прибортовой массив Рё возможно превышение максимальными касательными напряжениями UDC 622.271: 622.83 Sedina S.Рђ. 1*, Berdinova N.O. 1, Abdikarimova G.B. 1, Altayeva A.A. 1, Toksarov V.N. 2 1 Branch of the Republican State Enterprise В«National center for complex processing of mineral raw materials of the Republic of KazakhstanВ» D.A. Kunayev Mining Institute, Almaty, Kazakhstan; 2 Mining Institute of the Ural Branch of the Russian Academy of Sciences, Perm, Russia. Р•-mail: SSA2704@mail.ru NUMERICAL MODELING OF THE STRESS-STRAIN STATE OF THE KURZHUNKUL OPEN-PIT MINE Abstract. The stress-strain state of rocks is one of the main factors that determine the magnitude and nature of rock pressure, on which the safety of deep open pit development depends. When conducting mining operations, it is necessary to understand where zones of increased principal components of normal and maximum shear stresses form. The article presents the results of numerical modeling of the stress-strain state of the Kurzhunkul pit in a two-dimensional formulation by the finite element method in the MIDAS GTS NX software package. In mathematical modeling, the stresses actually acting in the array, determined by field measurements, were taken into account. A model based on the results of modeling is presented, which can be used to predict changes in the maximum gradient of horizontal stress with an increase in the depth of mining of the Kurzhunkul open-pit mine. Based on the results of the modeling of the sides in the southeastern north-western directions, areas were identified where there is an unfavorable effect of the maximum shear stresses on the side rock mass and the maximum shear stresses (н µнјЏн µнјЏн µнјЏн µнјЏн µн±љн µн±љн µн±љн µн±љн µн±Ћн µн±Ћн µн±Ћн µн±Ћн µн±Ћн µн±Ћн µн±Ћн µн±Ћ) may exceed the shear strength. Also, an assessment of the influence of the main components of normal and maximum shear stresses on the stability of the near-rock pit rock mass is given. It has been determined that the geomechanical state of the sides of the Kurzhunkul open-pit mine is characterized by the action of low compressive stresses. The values of the maximum compressive stresses vary from 5.52 MPa to 14.25 MPa, increasing from the day surface to the bottom of the open pit. The minimum component of the principal stresses varies from 0.70 to 9.4 MPa. The values of tensile minimum stresses н µнјЋн µнјЋн µнјЋн µнјЋн µн±љн µн±љн µн±љн µн±љн µн±–н µн±–н µн±–н µн±–н µн±–н µн±–н µн±–н µн±– are significantly less than the calculated values of tensile stresses н µнјЋн µнјЋн µнјЋн µнјЋн µн±ќн µн±ќн µн±ќн µн±ќ in the sample and do not affect the stability of the pit edges. Key words: stress-strain state, pit, distribution of principal stresses, rock mass stability, a two-dimensional numerical model. Introduction. The problem of predicting the tectonic effect on the stress state of the rock mass is important in geomechanics today. If the natural stresses in the sides of the pit slope are high and exceed the strength of the rock mass, then its deformation occurs and large zones of weakened rocks are created, which can then collapse under the influence of their own weight [1, 2]. Based on the results of field studies, it was determined that the stress-strain state of the rock masses of the Kurzhunkul pit was attributed to the gravitational-tectonic type [3]. The stability of quarry walls in rocky tectonically stressed rocks is determined, first, by the parameters of the stressstrain state, structural disturbance, and strength characteristics of the rock mass. Materials and methods. To substantiate the rational design parameters of the Kurzhunkul opencast mine, calculations were performed to estimate the stress-strain state of the rock mass in a two-dimensional (2D) formulation by the finite element method using the MIDAS GTS NX software package. Finite element method (FEM) calculation in MIDAS GTS NX can be conditionally divided into the following stages: - setting the computational domain with the selection of characteristic areas and mechanical properties for the selected areas; предела прочности РЅР° СЃРґРІРёРі. Также приведена оценка влияния главных компонент нормальных Рё максимальных касательных напряжений РЅР° устойчивость прибортового массива карьера. Определено, что геомеханическое состояние бортов Куржункульского карьера характеризуется действием невысоких сжимающих напряжений. Величины максимальных сжимающих напряжений изменяются РІ пределах РѕС‚ 5,52 РњРџР° РґРѕ 14.25 РњРџР°, увеличиваясь РѕС‚ дневной поверхности Рє РґРЅСѓ карьера. Минимальная компонента главных напряжений меняется РѕС‚ 0,70 РґРѕ 9,4 РњРџР°. Значения растягивающих минимальных напряжений значительно меньше расчетных значений напряжений РЅР° растяжение РІ образце Рё РЅРµ оказывают влияния РЅР° устойчивость бортов карьера
Держатели документа:
ЗКУ
Доп.точки доступа:
Sedina, S.А.
Berdinova, N.O.
Abdikarimova, G.B.
Altayeva, А.А.
Toksarov, V.N.