scholarly journals Kaolinite clays as a source of raw materials for the aluminum industry of the Republic of Kazakhstan

Author(s):  
B. K. Kenzhaliyev ◽  
◽  
L.M. Imangalieva ◽  
A.I. Manapova ◽  
M.N. Azlan ◽  
...  

Kaolinite clays can serve as an additional source of alumina in the Republic of Kazakhstan. The most promising is the Alekseevsky kaolinite deposit. To obtain high-quality kaolinite and quartzite products, it is necessary to develop special enrichment techniques, since no satisfactory results were achieved when using standard methods of gravitational enrichment of kaolinites. The paper presents the results of studies of the effect of preliminary chemical activation during the processing of kaolinite clays of the Alekseevsky deposit. Previously, the method of preliminary chemical activation of raw materials in a solution of sodium bicarbonate has proven itself well in the processing of various mineral raw materials. It was determined that during the preliminary chemical activation in a solution of sodium bicarbonate, changes occurred in the phase composition of the kaolinite fraction: the content of muscovite decreased almost twice; the phase of sodium aluminosilicate was formed. The dependence of the yield of Al2O3 in the kaolinite fraction on the temperature of chemical activation, duration, and the ratio of L:S and the concentration of the sodium bicarbonate solution during chemical activation. The optimal mode of preliminary chemical activation of kaolinite clay of the Alekseevsky deposit has been established: the temperature is 150 oC, the duration is 120 minutes and the concentration of sodium bicarbonate solution is 120 g/dm3. A basic technological scheme is proposed for the processing of kaolinite clays.

2021 ◽  
Author(s):  
S. Dyussenova ◽  
◽  
Ahmed A. M. El-Amir ◽  
◽  
◽  
...  

In the Republic of Kazakhstan, the most promising are kaolinite clays of the Alekseevsky deposit. For effective processing of clays, it is necessary to develop special methods of processing, since satisfactory results were not achieved when using standard methods of gravity processing. The article provides the results of studies of the effect of preliminary chemical activation on the yield of the kaolinite fraction during gravitational processing. Previously, the method of preliminary chemical activation of raw materials in a solution of sodium bicarbonate has proven itself well in the processing of various mineral raw materials. It is determined that as a result of preliminary chemical activation, changes in the phase composition occurred. The dependence of the yield of the kaolinite fraction on the temperature of chemical activation, duration, and the ratio of W:T and the concentration of the sodium bicarbonate solution. Based on the results obtained, a technology for the complex processing of kaolinite clays has been developed, which provides for the preliminary chemical activation of the feedstock at the beginning of the process, which will effectively isolate high-quality kaolinite and quartz products, which will significantly reduce the flow of materials entering for sintering. As a result of activation, the phase composition of the kaolinite fraction has changed: the percentage of the kaolinite fraction has decreased; new phases of muscovite and sodium aluminosilicate appeared; the amount of quartz increased.


2021 ◽  
Author(s):  
S.V. Gladyshev ◽  
◽  
M.N. Azlan ◽  

The method of preliminary chemical activation of mineral raw materials was used in the conducted studies for the complex processing of pyritic slags. The influence of preliminary chemical activation of kaolinite clays of Alexeevsky deposit in the solution of sodium hydrogen carbonate on the separation of kaolinite and quartz fractions was studied. The temperature of 150 oC, the duration of 120 minutes, and the concentration of sodium bicarbonate solution of 120 g/dm3 should be considered the optimum mode of activation. As a result of activation, the phase composition of the kaolinite fraction changed: the percentage of kaolinite fraction decreased; new phases of muscovite and sodium aluminosilicate appeared; the amount of quartz increased.


2014 ◽  
Vol 1058 ◽  
pp. 213-216 ◽  
Author(s):  
Guang Xu ◽  
Jin Hu ◽  
Yu Tian Wang

Iridium trichloride hydrate and acetyl acetone were used as raw materials, Tris – acetylacetonate - iridium (III) was synthesis by the method of solutions - precipitating method. Composition and structure of obtained organic complex were investigated by means of Elemental Analysis, IR, 1HNMR and UV-vis. Effect of sodium bicarbonate solution concertation on the synthesis yield also been studied. The results demonstrated that two oxygen atoms in acetyl acetone form chelated hexatomic ring with iridium ions. The highest yield was 19.9% when the concentration of sodium bicarbonate was 0.56mol/l.


2012 ◽  
pp. 53-58
Author(s):  
S. Afontsev ◽  
N. Zubarevich

The questions of spatial development as a modernization driver (the Kazakhstan case) are considered in this article. The analysis of the regional economic differences makes possible to work out the development guidelines, based on the advantages combination of the basic goods specialization and the policy of transferring growth impulses from the raw materials sector to the industry and service ones. Current challenges and opportunities, which face the Kazakhstan economy, the questions of economic diversification drive up the importance of the connection between spatial development and the cluster priorities. The analytical scheme of macro-regions and diversification through the dynamic focal networks can settle up these challenges.


2020 ◽  
Vol 8 (3) ◽  
pp. 74-78
Author(s):  
Farrux Zulfiyev ◽  

This article is based on the principles of shared financing of the production of raw materials. The article is aimed at financing the production of capital on the basis of equity in order to further strengthen the stability of economic reforms in the republic. At the same time, the essence of equity financing, the risks associated with it, and the efficiency of raw materials are covered


2021 ◽  
Vol 5 (2) ◽  
pp. 16
Author(s):  
Isabel Padilla ◽  
Maximina Romero ◽  
José I. Robla ◽  
Aurora López-Delgado

In this work, concentrated solar energy (CSE) was applied to an energy-intensive process such as the vitrification of waste with the aim of manufacturing glasses. Different types of waste were used as raw materials: a hazardous waste from the aluminum industry as aluminum source; two residues from the food industry (eggshell and mussel shell) and dolomite ore as calcium source; quartz sand was also employed as glass network former. The use of CSE allowed obtaining glasses in the SiO2-Al2O3-CaO system at exposure time as short as 15 min. The raw materials, their mixtures, and the resulting glasses were characterized by means of X-ray fluorescence, X-ray diffraction, and differential thermal analysis. The feasibility of combining a renewable energy, as solar energy and different waste for the manufacture of glasses, would highly contribute to circular economy and environmental sustainability.


2017 ◽  
Vol 100 (3) ◽  
pp. 299-312 ◽  
Author(s):  
Muhammad Imran Din ◽  
Sania Ashraf ◽  
Azeem Intisar

In this review, various methods of preparation of activated carbon from agricultural and commercial waste material are reviewed. In addition, we also discuss various activation treatments using a comparative approach. The data are organised in tabulated form for ease of comparative study. A review of numerous characterisation techniques is also provided. The effect of time and temperature, activation conditions, carbonisation conditions and impregnation ratios are explained and several physical and chemical activation treatments of raw materials and their impact on the micro- and mesoporous volumes and surface area are discussed. Lastly, a review of adsorption mechanisms of activated carbon (AC) is also provided.


Author(s):  
Firuza Alisherovna Umarova ◽  
◽  
Kamal Saidakbarovich Rizaev ◽  
Nemat Kayumovich Olimov ◽  
Zaynab Enverovna Sidametova ◽  
...  

Analysis of the assortment of sedatives registered in the Republic of Uzbekistan showed that sedatives are represented on the pharmaceutical market of the country by such dosage forms as drops, solutions, tinctures, syrups, medicinal herbal raw materials, capsules and tablets. Considering that sedatives registered in the form of a substance, with the exception of the dry extract of Leoglycyrfl produced by “Uzkimyofarm”, there are practically no names of S.K. Islambekov in the Joint Stock Company. In this regard, we consider it expedient to create a new sedative medicinal product of herbal origin in the form of a substance and obtain dosage forms based on it.


2021 ◽  
Vol 26 (2) ◽  
pp. 137-143
Author(s):  
S. N. Gromova ◽  
N. A. Guzhavina ◽  
E. A. Falaleeva ◽  
E. P. Kolevatykh ◽  
А. V. Elikov ◽  
...  

Relevance. A wide variety of oral care products is available nowadays. Sometimes aggressive advertising rather than doctor’s advice determines our patients’ choice. In our research, we provide evidence of the clinical use of toothpaste containing fluoride and sodium bicarbonate.Materials and methods. During four weeks, we followed up a group of students who used the toothpaste containing 1400 ppm fluoride and 67% aqueous sodium bicarbonate solution. The clinical, biochemical and microbiological tests and saliva crystallization score assessed the characteristics stated by the manufacturer.Results. The statistically significant correlation between all studied criteria is evidence of the effectiveness of the toothpaste. In addition to the significant remineralization and antiplaque effect, biochemical and microbiological tests confirmed the anti-inflammatory effect of the toothpaste. An immediate cleaning effect was observed after the first brushing as well as in long-term use.Conclusion. Improvement of oral hygiene indices and reduction of periodontal inflammation confirmed the successful result of the comprehensive treatment of chronic gingivitis.


2021 ◽  
pp. 65-67
Author(s):  
Валентина Батырбековна Цугкиева ◽  
Борис Георгиевич Цугкиев ◽  
Лариса Батарбековна Дзантиева

Разработана технология производства овощного пюре из корнеклубней якона, успешно интродуцированного в Республику Северная Осетия - Алания. Изучая химические показатели корнеклубней якона, установлено, что они отличаются богатым химическим составом и содержат сухих веществ - 11,9 %, протеина - 1,88 %, жира - 0,21 %, клетчатки - 1,06 %, золы - 1,48 %, безазотистых экстрактивных веществ - 9,0 %, инулина - 9,0 %, кислотность - 0,22 %. Якон имеет богатый минеральный состав. В 1 кг корнеклубней якона содержится кальция - 0,4 г, фосфора - 0,3 г, железа - 56,1 мг, меди - 0,57 мг, цинка - 3,0 мг, марганца - 12,6 мг, кобальта - 0,03 мг, йода - 0,01 мг, селена - 0,041 мг. Установлено, что в пюре из якона содержание сухих веществ составляет 15,0 %, что соответствует стандартам, содержание жира достигает 4,5 %, а минеральных примесей - 0,003 %. Растительные и посторонние примеси не обнаружены. По внешнему виду пюре из корнеклубней якона представляет собой однородную пюреобразную массу. Запах пюре фруктовый, без постороннего запаха. Вкус сладковатый, полный, насыщенный с приятным послевкусием, без постороннего вкуса. Цвет пюре однородный по всей массе: от желтого до светло-коричневого. Потемнение поверхностного слоя отсутствует. Особую ценность якону придает наличие в его составе инулина - природного полисахарида, на 95% состоящего из фруктозы, что позволяет корневые клубни якона и полученный продукт из него - пюре - рекомендовать как диетический продукт, в том числе людям, страдающим сахарным диабетом и ожирением. Установлено, что целесообразно использовать корневые клубни якона для производства овощного пюре. Пюре из корнеклубней якона по физико-химическим и органолептическим показателям соответствует требованиям стандартов. A technology to produce yacon pips-besed mashed vegetables successfully introduced to the Republic of North Ossetia - Alania is developed. Studying the chemical parameters of yacon pips, it was found that they differ in rich chemical composition and contain dry matter - 11.9 %, protein - 1.88 %, fat - 0.21 %, fiber - 1.06 %, ash - 1.48 %, nitrogen-free extractives - 9.0 %, inulin - 9.0 %, acidity - 0.22 %. Yacon has the rich mineral composition. 1 kg of yacon pips contains calcium - 0.4 g, phosphorus - 0.3 g, iron - 56.1 mg, copper - 0.57 mg, zinc - 3.0 mg, manganese - 12.6 mg, cobalt - 0.03 mg, iodine - 0.01 mg, selenium - 0.041 mg. It was found that mashed yacon contains 15.0 % of dry matter, which meets standards, the fat content reaches 4.5 %, and mineral admixtures - 0.003 %. No plant or extraneous matter was detected. In appearance, the yacon pips-based mash is a homogeneous, mash-like mass. The mash smell is fruity, free of any foreign smell. The taste is sweet, full, rich, with a pleasant aftertaste, free of foreign taste. The color of the mash is homogeneous throughout the whole mass from yellow to light brown. There is no darkening of the surface layer. The special value of yacon is due to inulin in its composition - natural polysaccharide, consists of 95 % fructose, which allows the yacon pips and the resulting product - mash, to be recommended as a dietary product, including people suffering from diabetes and obesity. It was found that it is advisable to use yacon pips for the production of mashed vegetables. Yacon pips-based mash meets standards in physico-chemical and organoleptic parameters.


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