Processing Kazkahstan’s chromonickel ore

Tolymbekov, M. Zh.; Kelamanov, B. S.; Baisanov, A. S.; Kaskin, K. K.

doi:10.3103/s0967091208080184

Cited by 4 publications

(5 citation statements)

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“…One of the rational ways to dip the small stuff of charge materials is the sintering process. The sintering process is a traditional and indispensable method of preparing metallurgical raw materials and helps to reduce energy consumption during smelting; the gas permeability of the charge materials is improved [7][8][9][10][11][12][13].…”

Section: Methodsmentioning

confidence: 99%

Technological Analysis of the Production of Nickel-Containing Composite Materials

Kelamanov,

Yessengaliyev,

Sariev

et al. 2024

J. Compos. Sci.

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The article presents the results of obtaining a composite material by sintering nickel-containing raw materials mixed with carbon-containing materials, namely using coke and semi-coke. The sintering process was performed at a charge layer height of 240 mm and the temperature of the lower layer was T = 1200 °C. The results of the sieve analysis showed (a fraction of 10 mm) that the yield of a suitable composite material using coke was 68.3% and with semi-coke 67.0%. The average nickel and chromium content in the composite materials was 1.42% and 3.07%, accordingly. As a result of determining the strength characteristics of the obtained composite materials with various reducing agents by dropping from a height of 2 m onto a steel pallet, it was found that the obtained composite materials have high mechanical properties in terms of strength of 81% and 89.2%. The results of the elemental composition at the studied points and the thermal analysis of the studied composite material are presented. The mineralogical composition of the composite material is presented in the form of serpentine and nontronite, and the empty rock is made of quartz and talc. The activation energy of thermal analysis by the method of non-isothermal kinetics were calculated. The results of experiments on the production of composite materials from nickel-containing raw materials will be recommended for obtaining the optimal composition of composite materials at the stage of pilot tests and industrial development of the developed technology for processing nickel ores of the Republic of Kazakhstan. For the processing of nickel-poor nickel ores, it is of great importance to obtain optimal technological and technical and economic indicators that ensure low cost of nickel in the resulting product.

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Section: Methodsmentioning

confidence: 99%

Technological Analysis of the Production of Nickel-Containing Composite Materials

Kelamanov,

Yessengaliyev,

Sariev

et al. 2024

J. Compos. Sci.

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“…Сұйытылған мұнай газдарын каталитикалық өңдеу өзекті болып табылады. Әртүрлі тасымалдағыштарға отырғызылған, әртүрлі модифицирлеуші үстемелер қосылған монометалдық катализаторлар гидрлеу, дегидрлеу, полимерлену және СО конверсиялау процестерінде зерттелді [3][4][5][6][7][8][9]. Көптеген ауыспалы металдар мен олардың қосылыстары өндірісте, химияда, металлургияда, медицинада кеңінен қолданылады.…”

Section: Cұйытылған мұнай газдарын моно-және биметалдық катализаторлаunclassified

“…Көптеген ауыспалы металдар мен олардың қосылыстары өндірісте, химияда, металлургияда, медицинада кеңінен қолданылады. Өнеркәсіптік никель өсімдік майлары мен қанықпаған органикалық қосылыстарды гидрогенизациялауға арналған хром катализаторы ретінде кеңінен танымал [3][4][5]. Жұмыста [7] көміртегі оксидінің ZnO•Cr 2 O 3 -су буының қатысуымен катализаторға айналуы зерттелді, бұл кокстың шөгуін азайтады [8][9][10][11].…”

Section: Cұйытылған мұнай газдарын моно-және биметалдық катализаторлаunclassified

Processing of Liquefied Petroleum Gases Over Mono-and Bimetallic Catalysts

Orynbassar

Aubakirov

Zhumabekova

et al. 2021

Series Chemistry and Technology

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The reserves of liquefied petroleum gas in the production zones and fields are briefly characterized in present paper. The scope of liquefied petroleum gases application, catalytic transformation and their importance in obtaining products are described. Widespread use of nanostructured and nanoscale catalysts in catalysis processes and their properties are given in literature review. Chemical transformations of С3-С4-alkanes in the presence of mono- and bimetallic catalysts based on Cr/SiO2 are studied. By method of electron microscopy, it was determined that various highly dispersed oxides of chromium in lanthanum – modified catalyst interact with each other and with carrier. According to electronic paramagnetic resonance data, chromium is contained in a five- and three-valence state. Mono - and bimetallic catalysts were studied by physical and chemical methods: IR spectroscopy, electron microscopy (EM) using micro diffraction, EPR. Monometallic catalysts with a chromium content of 2-10 wt. % and bimetallic lanthanum-chromium-containing catalyst in the form of 5% La-Cr/SiO2 in a ratio of 1/1 were prepared in the work; the process temperature was varied in the range of 400 to 650°С. Introduction of lanthanum leads to the formation of LaCrO3, LaCrO4 compounds with low activity in dehydro-genation reaction of C3-C4 – alkanes. The maximum yield of C2-C4-olefins - 39.2%, i.e. the formation of propylene in high doses was observed in the presence of 5% Cr/SiO2.

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“…Heavy metals (Cd, Cu, Zn, Pb, Ni and Cr) are among the priority pollutants of water bodies in the Central Asian region and Kazakhstan in particular (Barber et al, 2005;Kurakov & Tynybaeva, 2007;Tolymbekov, Kelamanov, Baisanov & Kaskin, 2008;Zhaoyong, Abuduwaili & Fengqing, 2015;Solodukhin et al, 2004;. The content of heavy metals in natural aquatic ecosystems is determined by a complex of factors.…”

Section: Introductionmentioning

confidence: 99%

Untitled

Krupa¹,

Sophia²,

Sophia³

2019

Turk. J. Fish. Aquat. Sci.

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The aims of present work were to analyze on the base of our data of 1997-2017 the changes in the content of heavy metals in 118 water bodies in Kazakhstan, determine the relationship between the content of heavy metals and the level of anthropogenic load, to reveal natural factors affecting the accumulation of heavy metals in the water. It was revealed that average Cd content was 0.01-7.7 μg dm-3 , Cu-1.6-158.2, Zn-1.5-44.1, Pb-1.4-19.4, Cr-0.05-14.6, Ni-0.2-227.2 μg dm-3. The level of toxic pollution of water bodies increased against the altitude gradient. The relationship between the content of heavy metals and the altitude of location of a water body was indirect, because was an accompanying change in the pH, temperature, and TDS of water. In water bodies with a TDS above 2000 mg dm-3, Pb, Cr, Cd and Cu were accumulating most intensively, whereas fresh waters contained higher amounts of Zn and Ni. Regression analysis revealed the leading role of pH in the accumulation of heavy metals in water bodies. An increase in anthropogenic load in the direction from mountainous areas to plains led to the additional enrichment of water bodies with heavy metals.

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Processing Kazkahstan’s chromonickel ore

Cited by 4 publications

References 0 publications

Technological Analysis of the Production of Nickel-Containing Composite Materials

Technological Analysis of the Production of Nickel-Containing Composite Materials

Processing of Liquefied Petroleum Gases Over Mono-and Bimetallic Catalysts

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