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Статті в журналах з теми "Mechanical impurities"

Автор: Grafiati

Опубліковано: 28 травня 2022

Оновлено: 31 липня 2025

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1

Tanzharikov, P. A., N. S. Suleymenov, and B. B. Bulegenov. "ANALYSIS BASED ON THE INFLUENCE OF MECHANICAL IMPURITIES IN THE OIL WELL ON THE SUBMERSIBLE PUMPING EQUIPMENT." ТЕХНИКА ҒЫЛЫМДАРЫ ЖӘНЕ ТЕХНОЛОГИЯ 1 (2023): 5–14. http://dx.doi.org/10.52081/tst.2023.v01.i1.001.

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Анотація:

The oil and gas companies are working to improve effective ways and technologies to combat the factors that complicate stable oil production. Among the main factors complicating oil well operation is the resistance of mechanical impurities in the reservoir fluid. Nowadays electrical centrifugal pumping units are widely used in the most part of oil production, and intensive ejection of mechanical impurities together with the oil during operation in the well is considered as the main problem of oil producing companies. This article considers the optimal methods and technologies of protection aga

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2

Yvon, P. J., and R. B. Schwarz. "Effects of iron impurities in mechanical alloying using steel media." Journal of Materials Research 8, no. 2 (1993): 239–41. http://dx.doi.org/10.1557/jmr.1993.0239.

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Mechanical alloying, a high-energy ball-milling technique, is now widely used for preparing alloy powders with metastable phases (crystalline or amorphous). The technique, however, may contaminate the powder with material eroded from the vial and milling media. We report on the analysis and effects of iron contamination on Al25Ge75 powders that we prepared by mechanically alloying mixtures of aluminum and germanium powders, using different mechanical alloying apparatuses.

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3

Ovchinnikov, N. P. "Assessment of mine water solid phase impact on section pumps performance in the development of kimberlite ores." Gornye nauki i tekhnologii = Mining Science and Technology (Russia) 7, no. 2 (2022): 150–60. http://dx.doi.org/10.17073/2500-0632-2022-2-150-160.

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Despite innovations in ALROSA’s (PJSC) mining and processing complexes under the updated strategy for economic development, practice shows that in recent few years the operating costs of the section pumps at the Udachny underground mine’s main drainage have increased significantly. Such an increase could be the result of a concentration of mechanical impurities in the mine water. This study is aimed at the integrated assessment of the impact of mechanical impurities concentration in mine water on the performance of the Udachny underground mine’s main drainage section pumps. It is also aimed at

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4

LAMSKOVA, M. I., M. I. FILIMONOV, Y. I. SUKHAREV, A. E. NOVIKOV, and S. V. BORODYCHEV. "OPTIMIZATION OF THE DESIGN-OPERATING PARAMETERS OF THE HYDROCYCLONE TAKING INTO ACCOUNT FIELD RESEARCH." Prirodoobustrojstvo, no. 4 (2020): 61–67. http://dx.doi.org/10.26897/1997-6011-2020-4-61-67.

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Cylindrical-conical pressure hydrocyclones are characterized by high productivity and efficiency indicators of water treatment from mechanical impurities at a relatively small size and cost, low resource costs for operation, which makes their use promising as a water treatment unit in the circulating water distribution systems of domestic and foreign industry. The purpose of the research is development of the construction of a filtering hydrocyclone and assessment of the impact of the fl ow characteristics and size of the sand pipe on the separative power of the apparatus in the process of wat

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5

Caro, A., Diana Farkas, E. M. Bringa, G. H. Gilmer, and L. A. Zepeda-Ruiz. "Effects of Microalloying on the Mobility and Mechanical Response of Interfaces in Nanocrystalline Cu." Materials Science Forum 633-634 (November 2009): 21–30. http://dx.doi.org/10.4028/www.scientific.net/msf.633-634.21.

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We utilize a novel computational approach to model the problem of impurity segregation at grain boundaries in nanophase materials. It is based on a parallel MonteCarlo algorithm that places the impurities according to the local chemical potential for the species, following the thermodynamic driving force for segregation. This technique is combined with molecular dynamics techniques to study the role played by Fe impurities in the properties of nanocrystalline Cu grain boundary properties. The impurities were found to improve microstructural stability as studied by high temperature annealing si

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6

Sumino, Koji, and Ichiro Yonenaga. "Interactions of Impurities with Dislocations: Mechanical Effects." Solid State Phenomena 85-86 (December 2001): 145–76. http://dx.doi.org/10.4028/www.scientific.net/ssp.85-86.145.

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7

Pogrebnaya, I. A., and S. V. Mikhailova. "Research analysis of mechanical impurities of wells." IOP Conference Series: Earth and Environmental Science 181 (August 16, 2018): 012026. http://dx.doi.org/10.1088/1755-1315/181/1/012026.

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8

Amir, Nizar, Makhfud Efendy, Wiwit Sri Werdi Pratiwi, et al. "The utilization of salt particles from seaweed processing by-products for low-sodium salt production." BIO Web of Conferences 146 (2024): 01002. http://dx.doi.org/10.1051/bioconf/202414601002.

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Utilizing mechanical rotary and sieve separators to collect salt particles from the surface of dried Eucheuma cottonii represents an innovative methodological approach. In this study, a mechanical rotary separator was employed to separate impurities like salt particles, mud, stones, and seaweed chunks from the surface of the dried Eucheuma cottonii. Following that, a multi-layer vibro sieve separator was employed to separate the salt particles from impurities. This study aimed to investigate the influence of the separation duration in both equipment for separating impurities on the surface of

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9

Kvach, I. "Analysis of the Causes and Modern Methods to Combat the Negative Effect of Mechanical Impurities on the Operation of Deep Pumping Equipment." Bulletin of Science and Practice, no. 6 (June 15, 2023): 122–27. http://dx.doi.org/10.33619/2414-2948/91/14.

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Анотація:

The article is devoted to one of the most urgent problems at present, the issues of complicated mining conditions. The paper focuses on the fact that in modern conditions of production intensification, mechanical impurities of various composition, origin and concentration are one of the most important factors negatively affecting the operation of deep-pumping equipment of the mechanized fund of oil wells. The article analyzes the main sources and causes of the appearance of impurities in borehole products and equipment, identifies external and internal causes. It is pointed out the importance

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10

Kukhar, V., O. Spichak, O. Balalaieva, and I. Marchenko. "Development of mathematical models of changes in emulsion concentration and the content of mechanical impurities in technological fluids using the MATLAB package for experimental data processing." Reporter of the Priazovskyi State Technical University. Section: Technical sciences 1, no. 49 (2024): 100–109. https://doi.org/10.31498/2225-6733.49.1.2024.321216.

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The article presents the results of the study of the processes of modeling changes in the concentration of emulsions and the content of mechanical impurities in technological fluids used in cold rolling conditions. The main goal of the work is to develop mathematical models to describe the relationships between the concentration of emulsions and mechanical impurities, as well as to estimate the rate of their changes over time, which will allow to increase the efficiency of technological process control and ensure stable product quality. The study is based on the analysis of experimental data o

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11

Abbasova, S. V., M. K. Karazhanova, and L. B. Zhetekova. "X-ray phase analysis of the composition and size of sedimentary mechanical impurities in the working components of submersible pump equipment." SOCAR Proceedings, no. 4 (2024): 94–101. https://doi.org/10.5510/ogp20240401023.

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Анотація:

Fields at the final stage of development are characterized by high water cut, large amounts of mechanical impurities, formation of organic and inorganic deposits in the wellbore, as well as intensive equipment corrosion processes. Well operation in such conditions is associated with various difficulties that require extensive research. The solution to this problem depends on a systematic study of the technological efficiency of using downhole equipment, identifying the causes of failures of deep-well pumping equipment and analyzing the properties of impurities. The article is devoted to resear

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12

Zhao, Xiangran, Qing Wu, Muhammad Akbar, Rongrong Yin, Shiliang Ma, and Yong Zhi. "Effects of Marine Shellfish on Mechanical Properties and Microstructure of Coral Concrete." Buildings 13, no. 9 (2023): 2193. http://dx.doi.org/10.3390/buildings13092193.

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Using coral debris as coarse and fine aggregates and seawater as mixing water has been proposed to address transportation and material shortage issues in island and reef construction projects. However, the utilization of coral may result in impurities, such as shellfish and other marine organisms, which could impact the mechanical properties of the resulting concrete. The goal of this study is to find out how different amounts of shellfish and marine organism impurities affect the mechanical properties and microstructure of coral concrete. This study builds on the process of making full coral

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13

Dzharbinadze, Pavel, and Tat'yana Raskulova. "SELECTION OF A REAGENT TREATMENT SYSTEM FOR RECYCLED WATER INDUSTRIAL PRODUCTIONS." Bulletin of the Angarsk State Technical University 1, no. 18 (2024): 72–77. https://doi.org/10.36629/2686-777x-2024-1-18-72-77.

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Methods for solving the problem of reducing the efficiency of heat exchange equipment at indus-trial sites by increasing the content of mechanical impurities in its composition are analyzed. A selection of chemical reagents was carried out to reduce the content of mechanical impurities in the circulating water of enterprises, and their effectiveness was assessed

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14

Santomasi, Giusy, Francesco Todaro, Andrea Petrella, Michele Notarnicola, and Eggo Ulphard Thoden van Velzen. "Mechanical Recycling of PET Multi-Layer Post-Consumer Packaging: Effects of Impurity Content." Recycling 9, no. 5 (2024): 93. http://dx.doi.org/10.3390/recycling9050093.

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The recycling of PET trays is highly challenging. The aim of this paper was to investigate the issues related to the mechanical recycling process and, the correlation between feedstock composition and the quality of the produced rPET. Four feedstocks with different degrees of impurity were mechanically recycled at a laboratory pilot scale. The optical and thermal properties of the rPET products were examined to determine the quality and to seek relations with the starting level of impurities. The final products of the PET trays’ mechanical recycling were found to be affected by the presence of

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15

Kim, Yun-Hae, Kyung-Man Moon, Byeong-Woo Lee, et al. "AN EXPERIMENTAL STUDY OF MICRO-VOID CREATION BY IMPURITY IN COMPOSITE MATERIALS DURING VARTM PROCESS." International Journal of Modern Physics B 25, no. 31 (2011): 4204–7. http://dx.doi.org/10.1142/s0217979211066581.

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The effects of impurities on the generation of voids in composites fabricated by vacuum-assisted resin transfer molding was investigated to help reduce mechanical weakening in large structures. Impurities were intentionally inserted into laminates, which were then observed optically. Internal voids were generated in specimens with impurities of 2 – 3mm thickness. The voids grew as the impurities' thicknesses increased to 4 – 5 mm. The voids' diameters were proportional to the thickness of the impurity. Void generation was shown to depend on the thickness of impurities. Environmental control du

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16

Trulev, A. V., S. F. Timushev, A. V. Lomakin, and A. V. Klipov. "Improving flow path of the cyclone-type desenders using the multiphase coefficient of the discrete particles relative speed." Proceedings of Higher Educational Institutions. Маchine Building, no. 7 (760) (July 2023): 93–106. http://dx.doi.org/10.18698/0536-1044-2023-7-93-106.

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Анотація:

In the oil producing wells with high content of mechanical impurities and free gas, efficiency of the electric centrifugal pump is increased by installing the cyclone-type desenders at its inlet. Desender protects the submersed pump from mechanical impurities entering it by separation and collecting them in a special container. At the same time, the problem of free gas bubbles enlargement is being solved to facilitate their separation into the annulus and thus reduce the free gas content at the pump inlet. Analysis was made of specifics of the formation fluid flow containing mechanical impurit

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17

Qian, Yi Hua, Yi Bin Huang, Qiang Fu, Hai Yan Wu, and Zhen Sheng Zhong. "Comparative Study on the Impurities Content of Hydrogenated Transformer Oil under Static Condition." Advanced Materials Research 421 (December 2011): 129–35. http://dx.doi.org/10.4028/www.scientific.net/amr.421.129.

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The impurities content of domestic hydrogenated transformer oil and three kinds of naphthenic transformer oil had been determined by using the specified experimental methods. A series of experimental data had been obtained, including mechanical impurities, particulate contamination, corrosive sulfur, sulfur content, total acidity and interfacial tension. The impurities content of four kinds of transformer oil were compared with the quality indicators of transformer oil on GB/T7595-2008. The results showed that the impurities content of the former was not so satisfying although it had excellent

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18

Sibirev, A. V., A. S. Dorokhov, and A. G. Aksenov. "Substantiation of constructive and technological parameters of a cylindrical cleaner of soil impurities of onion harvester." Traktory i sel hozmashiny 85, no. 2 (2018): 59–64. http://dx.doi.org/10.17816/0321-4443-66416.

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A special feature of harvesting onion is that the composition of the impurities of the onion-soil heap coming from digging up to the separating working organs is soil lumps commensurate in size with onion bulbs, which are difficult to separate into slit (bar elevators, screens) working organs. Secondary separation of onion on the most common secondary separation devices - pinholes - is restrained by the heterogeneity of the mechanical properties of the harvested onions. In well-ripened onions with dead tops the roll-off angles are clearly separated from the rolling-off angles of plant and smal

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19

Kan, Eduard, Marina Li, Khusnobod Khushvaktova, Suriya Turaeva, and Sharifjon Sharopov. "Analysis of the effect of mechanical impurities in water on the hydroabrasive wear of the turbines of the Bozsu hydroelectric power plant." E3S Web of Conferences 410 (2023): 05031. http://dx.doi.org/10.1051/e3sconf/202341005031.

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The peculiarity of the operation of hydropower facilities (pumping stations and hydroelectric power plants) in the Republic of Uzbekistan is that the equipment works with liquids containing a large amount of mechanical impurities. The purpose of the research is to assess the effect of the content of mechanical impurities in water on waterjet wear. The object of research is the Bozsu HPP (Uzbekistan). To assess the hydroabrasive properties of a liquid with impurities, an analysis of the granulometric and mineralogical composition of sediments and especially those fractions of impurities that po

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20

Хамзина, Баян, Кайрбек Ихсанов, Гульмира Калешева, Тимур Тілеков та Тимур Кадралиев. "АНАЛИЗ ПРОБЛЕМ, ВОЗНИКАЮЩИЕ ПРИ ЭКСПЛУАТАЦИИ ПЕСЧАНЫХ СКВАЖИН". Батыс Қазақстан инновациялық-технологиялық университетінің Хабаршысы 31, № 3 (2024): 176–86. http://dx.doi.org/10.62724/202430302.

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Анотація:

The article considers the causes of the formation of mechanical impurities in deep pump wells and the consequences that it entails for the listed reasons. The impact of solid floating particles in the liquid on the well equipment and the importance of improving the filtration technology of sand- containing liquid to prevent it has been noted. As a method used in the fight against mechanical impurities, the advantages and disadvantages of the filter design, which washes the filter element without lifting the pumping equipment, and the V-shaped wire slotted grilles made of durable stainless stee

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21

Florêncio, Odila, Paulo Sergio Silva Jr, Walter José Botta Filho, and Carlos Roberto Grandini. "Effect of impurities on mechanical relaxation in niobium." Materials Research 6, no. 4 (2003): 541–44. http://dx.doi.org/10.1590/s1516-14392003000400020.

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22

Ostahie, Constantin-Narcis, and Tudor Sajin. "Kinetics of mechanical impurities electroseparation from dielectric liquids." Journal of Electrostatics 71, no. 4 (2013): 695–702. http://dx.doi.org/10.1016/j.elstat.2013.03.015.

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23

L'vov, V. A., and G. P. Pavlikhin. "Granulometric composition of mechanical impurities in liquid oxygen." Chemical and Petroleum Engineering 27, no. 4 (1991): 220–23. http://dx.doi.org/10.1007/bf01150226.

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24

T, Kimstach, Uzlov K, Solonenko L, Repyakh S, and Khrychykov V. "INVESTIGATION OF IMPURITIES IN BRONZE BrO3A3 INFLUENCE ON ITS MECHANICAL PROPERTIES." Theory and practice of metallurgy, no. 4, 2021 (June 1, 2021): 41–47. http://dx.doi.org/10.34185/tpm.4.2021.05.

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. Problem statement. To investigate the influence of main alloying components Sn, Al on 3… 4% each without taking into account impurities influence, as well as silicon, iron, zinc and lead in Cu-Sn-Al system bronze on its mechanical properties. Purpose. To establish permissible concentrations of silicon, iron, zinc and lead impurities in Cu-Sn-Al system bronze at tin and aluminum content each of 3… 4%. M aterial and methods. Alloys for investigation have been prepared by melting of technical purity primary charge materials in crucib le induction furnace using graphite crucible and charcoal as

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25

Pogrebnaya, Irina, and Svetlana Mikhailova. "Analysis of mechanical impurities contained in pumped liquids at the fields of Western Siberia." E3S Web of Conferences 420 (2023): 09017. http://dx.doi.org/10.1051/e3sconf/202342009017.

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Анотація:

Purpose of the study: analyze the mechanical impurities contained in the pumped liquids. To achieve this goal, the paper set the task of conducting a physicochemical analysis of the composition of solid deposits on parts that come into contact with an aggressive liquid. Scientific hypothesis Improving the reliability of field pipeline and pumping hydraulic systems is one of the most important tasks in oil production. In addition to oil, a significant amount of corrosive fluid is increasingly released from the reservoir during production, damaging the parts through which it passes. This natural

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26

Egorova, Yu B., L. V. Davydenko, and A. V. Shmyrova. "Prediction of Mechanical Properties of Ti-6AI-4V Titanium Alloy Bars Depending on Aluminum and Molybdenum Strength Equivalents." Solid State Phenomena 316 (April 2021): 227–32. http://dx.doi.org/10.4028/www.scientific.net/ssp.316.227.

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The article provides the results of a statistical research of the relation of mechanical properties and chemical composition of Ø 15-rolled, forged, and pressed bars made of various modifications of the Ti-6Al-4V titanium alloy. The authors studied the correlation of mechanical properties and the content of alloying elements, impurities, bar diameter, and post-annealing (using various industrial modes) structural parameters, on the basis of the analysis of production data, and established regression dependencies for estimating average values of mechanical properties of bars on aluminum and mol

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27

Dengaev, Aleksey, Vladimir Shishulin, Elena Safiullina, and Aleksandra Palyanitsina. "Modeling Results for the Real Horizontal Heavy-Oil-Production Well of Mechanical Solids." Energies 15, no. 14 (2022): 5182. http://dx.doi.org/10.3390/en15145182.

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Анотація:

Recently, more and more new oil fields entering commercial production are complicated by the content of high-viscosity products, which are located at relatively shallow depths. For the rational development of such fields, a network of horizontal wells is used. A special feature of these objects is a weakly cemented reservoir, which leads to significant sand occurrence during well operation. At the same time, the removal of mechanical impurities cannot be avoided even when using complex measures, including the use of various filters. There are quite a few methods describing the behavior of mech

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28

BULEGENOV, B. B., P. A. TANZHARIKOV, and N. S. SULEYMENOV. "ANALYSIS BASED ON THE INFLUENCE OF MECHANICAL IMPURITIES IN THE OIL WELL ON THE SUBMERSIBLE PUMPING EQUIPMENT." Neft i Gaz, no. 2 (April 15, 2023): 150–61. http://dx.doi.org/10.37878/2708-0080/2023-2.11.

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Анотація:

The oil and gas companies are working to improve effective ways and technologies to combat the factors that complicate stable oil production. Among the main factors complicating oil well operation is the resistance of mechanical impurities in the reservoir fluid. Nowadays electrical centrifugal pumping units are widely used in the most part of oil production, and intensive ejection of mechanical impurities together with the oil during its operation in the well is considered as the main problem of oil producing companies.

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29

Shuraits, A. L., A. V. Birykov, and A. P. Usachev. "DEVELOPMENT OF A CALCULATION METHODFOR TWO-STAGE NATURAL GAS PURIFICATION PLANTS FROM MECHANICAL IMPURITIES." Russian Journal of Building Construction and Architecture, no. 1(49) (February 24, 2021): 54–65. http://dx.doi.org/10.36622/vstu.2021.49.1.005.

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Анотація:

Statement of the problem. Currently, there is no methodology for calculating the degree of clogging of a multilayer filter cartridge taking into account the prevention of deposition of mechanical impurities in the gap between the coarse and fine filter cylindrical filter cartridges. In this regard, the development of such a technique is an urgent task. Results. In this paper, we propose a calculation method for determining the average integral degree of clogging of multilayer cylindrical filter cartridges with mechanical impurities and pressure loss on them which take into account the preventi

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30

Redko, Andriy, Ihor Redko, Artem Borodai, Serhii Andruh, and Serhii Borodai. "Development of a device for cleaning geothermal fluid from mechanical impurities and dissolved gases." Ventilation, Illumination and Heat Gas Supply 48 (March 29, 2024): 67–76. http://dx.doi.org/10.32347/2409-2606.2024.48.67-76.

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Анотація:

The results of the development of technology and devices for cleaning geothermal fluid from mechanical impurities and dissolved gases are given. The presence of dissolved hydrocarbon gases (methane and heavy hydrocarbons up to 60-90 %) in thermal waters significantly increases their energy potential. However, the presence of dissolved CO2, N2, H2S cause equipment corrosion. Therefore, degassing of thermal waters and cleaning from mechanical impurities allows increasing the reliability of exploiting of geothermal deposits. The technology provides purification of geothermal fluid from particles

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31

Camurri, Carlos, Claudia Carrasco, Antonio Pagliero, and Rodrigo Leite. "Influence of the Impurities on Cathodic Copper on the Ductility of Copper Wires." Materials Science Forum 706-709 (January 2012): 899–906. http://dx.doi.org/10.4028/www.scientific.net/msf.706-709.899.

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Анотація:

The main characteristic of cathodic copper is the concentration of impurities because it depends on mechanical characteristics, i.e. ductility, of the derived copper wires. The standard mechanical tests that evaluate their ductility, are quick elongation and spiral elongation tests. The results of these essais shown that there is not a clear correlation among the impurities content in cathodes and wire ductility. Also, the two mechanical tests actually used are not able to discriminate differences on the copper ductility associated to variations in impurities concentration, at ppm level. In th

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32

Abatbayev, A. "ANALYSIS OF WORKS AIMED AT CLEANING SUBMERSIBLE EQUIPMENT." POLISH JOURNAL OF SCIENCE, no. 61 (April 17, 2023): 67–69. https://doi.org/10.5281/zenodo.7835067.

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Анотація:

The article discusses the causes and classification of the causes of the destruction of the collector and the removal of sand. During the operation of wells complicated by the removal of mechanical impurities, there is a problem of clogging of the bottom of wells, equipment and the bottom-hole zone of the formation, which leads to a decrease in the potential of the well in terms of fluid extraction volumes. A similar situation occurs during technological operations. The occurrence of sand or paraffin-hydrate "plugs" for oil and gas companies is quite common. In relation to undergroun

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33

Melnikova, O. S. "Impact of distribution of impurity particles on electric strength of transformer oil." Vestnik IGEU, no. 6 (2019): 41–49. http://dx.doi.org/10.17588/2072-2672.2019.6.041-049.

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To extend the service life and ensure the operability of oil-filled transformer equipment, the attention is paid to the development of methods for monitoring the state of oil-barrier insulation. When monitoring the technical condition of transformer oil, the class of liquid purity is determined depending on the rated voltage of the equipment. However, the influence of the parameters of mechanical impurities on the breakdown voltage is not taken into account, thereby lowering the requirements for the quality of oil barrier insulation. This makes it relevant to study the influence of the size di

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34

Semenov, Andriy, Serhii Baraban, Mariia Baraban, Olena Zhahlovska, Serhii Tsyrulnyk, and Andrii Rudyk. "Development and Research of Models and Processes of Formation in Silicon Plates p-n Junctions and Hidden Layers under the Influence of Ultrasonic Vibrations and Mechanical Stresses." Key Engineering Materials 844 (May 2020): 155–67. http://dx.doi.org/10.4028/www.scientific.net/kem.844.155.

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In this article, mathematical models and processes of introducing homogeneous ultrasonic oscillations and mechanical stresses into silicon wafers in the direction of their thickness are developed and investigated, and mathematical models of the movement of interstitial defects in silicon wafers created by the processes of ion-beam transients at the transitions of ion-beam transitions and hidden dielectric layers using the action of ultrasound oscillations and mechanical stresses, both in the process of implantation of impurities and before the annealing of plates upon activation of the impurit

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35

Popescu, Alexandra, and Daniel Vizman. "Influence of Mechanical Stirring on the Crucible Dissolution Rate and Impurities Distribution in Directional Solidification of Multicrystalline Silicon." Annals of West University of Timisoara - Physics 58, no. 1 (2015): 27–37. http://dx.doi.org/10.1515/awutp-2015-0204.

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Abstract In this study, time dependent three-dimensional numerical simulations were carried out using the STHAMAS3D software in order to understand the effects of forced convection induced by mechanical stirring of the melt, on the crucible dissolution rate and on the impurities distribution in multicrystalline silicon (mc-Si) melt for different values of the diffusion coefficient.Numerical simulations were performed on a pilot scale furnace with crucible dimensions of 38x38x40cm3. The computational domain used for the local 3D-simulations consists of melt and crystal.The dissolution rate was

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36

Shishlyannikov, Dmitriy, Valeriy Zverev, Anna Ivanchenko, and Ivan Zvonarev. "Increasing the Time between Failures of Electric Submersible Pumps for Oil Production with High Content of Mechanical Impurities." Applied Sciences 12, no. 1 (2021): 64. http://dx.doi.org/10.3390/app12010064.

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The main principles of hydroabrasive wear of parts of the pumping stages of well’s electric submersible pumps are considered in this article. The concentration, grain-size distribution and shape of solid particles have the greatest impact on the abrasion ability of particles of mechanical impurities interacting with the parts of pumping equipment. The implementation of filters is the most effective and affordable way to protect borehole electric submersible pumps from hydroabrasive wear. Filters reduce the concentration and decrease the average grain-size of mechanical impurities going through

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37

Takata, Kousuke, Jun Fujise, Bonggyun Ko, and Toshiaki Ono. "Influence of impurities on mechanical strength of silicon crystal." Japanese Journal of Applied Physics 58, no. 4 (2019): 045507. http://dx.doi.org/10.7567/1347-4065/ab0ebc.

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38

Rudneva, E. B., V. L. Manomenova, A. É. Voloshin, A. A. Kaminskiĭ, A. B. Vasil’ev, and B. V. Mchedlishvili. "Growth of KDP crystals from solutions with mechanical impurities." Crystallography Reports 51, no. 1 (2006): 142–49. http://dx.doi.org/10.1134/s106377450601024x.

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39

Huzayyin, A., S. Boggs, and R. Ramprasad. "Quantum mechanical studies of carbonyl impurities in dielectric polyethylene." IEEE Transactions on Dielectrics and Electrical Insulation 17, no. 3 (2010): 920–25. http://dx.doi.org/10.1109/tdei.2010.5492267.

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40

Akhmedova, Tamara. "Mathematical modelling of hydrochemical processes in surface waters." E3S Web of Conferences 365 (2023): 03041. http://dx.doi.org/10.1051/e3sconf/202336503041.

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In recent years, a large number of mathematical models of water quality have been developed which can be used for predictive calculations under certain conditions. This work is mainly devoted to the mechanical aspects of substances transport in watercourse systems. It is practically possible to quickly determine the concentration of impurities in a river only by methods of mathematical modelling of impurities transport.

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41

Kan, Eduard, and Nikolay Vatin. "Consumption of Irrigation Pumps Pumping Water with a High Content of Mechanical Impurities." E3S Web of Conferences 365 (2023): 03011. http://dx.doi.org/10.1051/e3sconf/202336503011.

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The water pumped by reclamation stations of the Republic of Uzbekistan contains many mechanical impurities. This negatively affects the operation of pumping units. There is a decrease in the operating parameters of the pumping unit and the associated increase in electricity consumption. Analysis of the alluvial regime of the main water sources of large pumping stations shows that the sediment concentration can reach values of 15-20 kg/m3 and, on average, up to 8-10 kg/m3 (i.e., exceed the permissible values according to the technical requirements for centrifugal pumps by 2-3 times). Based on t

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42

Alvarez, Jose R., and Peter Rez. "Electronic Structure Studies of Impurities In Fe." Microscopy and Microanalysis 3, S2 (1997): 659–60. http://dx.doi.org/10.1017/s1431927600010187.

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Small concentrations of impurities can dramatically change mechanical properties of metals and alloys since they modify bonding and cohesion at grain boundaries. In particular, impurities like B, C, P and S have received considerable attention for their effect on the mechanical properties of Fe. It is known that B and C behave as cohesive enhancers, whereas P and S tend to embrittle iron. Ab initio electronic structure calculations for supercell models of Fe crystals with B, C, P and S impurities have been performed to understand how these impurities modify the electronic states on surrounding

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43

Yuan, Shihua, Qiang Xu, Bing Dai, Yonggao Li, and Penghui Wang. "Research on high-precision and high-speed filtration methods for synthetic cutting fluid." Journal of Physics: Conference Series 2955, no. 1 (2025): 012037. https://doi.org/10.1088/1742-6596/2955/1/012037.

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Abstract During the mechanical processing of large aluminum alloy parts, deterioration of synthetic cutting fluid accelerated by foreign impurities can easily lead to the surface corrosion phenomenon of aluminum alloy parts, affecting the surface quality of the parts. This work analyzed the improvement of synthetic cutting fluid performance under high-precision filtration by using a silicon carbide filter with 100 nm precision. After high-precision filtration, the residual rate of solid impurities in the synthetic cutting fluid was 0.09%, the residual rate of oil impurities was 4%, and the res

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44

Vicent Fanconi, Mateo M., Ignacio Gil Fernández-Marcote, and Íñigo Ruiz-Bustinza. "The Challenge of Impurities (Fe, Si) to Recycling in the Rolled Aluminum Industry in the Coming Years in Relation to Their Influence on Ultimate Tensile Strength." Metals 13, no. 12 (2023): 2014. http://dx.doi.org/10.3390/met13122014.

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The increased recycling in aluminum production has raised the impurity content in the industry, thus increasing its effect on mechanical characteristics and making it difficult for recycled products to meet the properties’ goals as their effect is not yet sufficiently known. Therefore, the two main impurities (Fe and Si) in standard aluminum rolling mill products of alloy 5754 were investigated to determine their effects on the ultimate tensile strength (UTS). After analyzing the composition, mechanical properties, and microstructure, the relationship of both impurities with the UTS in fully a

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45

Bouldin, C. E., E. A. Stern, M. S. Donley, and T. G. Stoebe. "Iron impurities in Si3N4 processing." Journal of Materials Science 20, no. 5 (1985): 1807–14. http://dx.doi.org/10.1007/bf00555287.

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46

Mikerego, Emmanuel, Nestor Niyonzima, and Jean Claude Ntirampeba. "Impact of impurities of local construction materials on the bearing capacity of the concrete used in structures in Burundi." Vestnik MGSU, no. 10 (October 2021): 1357–62. http://dx.doi.org/10.22227/1997-0935.2021.10.1357-1362.

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Introduction. The article is about an assessment of the impact of impurities contained in the local construction materials on the mechanical characteristics of the concrete used in reinforced concrete structures in Burundi.  Materials and methods. The methodology of the study consisted in varying the quantity of impurities for the manufacturing of the concrete experimental cubic samples. The grain sizes of the studied ordinary concrete were in the favourable zones according to the recommended granulometry for standard concretes. Simulation of impurities was made by adding in the m

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47

Шурайц, А. Л., А. В. Бирюков, and А. П. Усачев. "DEVELOPMENT OF A CALCULATION METHOD FOR TWO-STAGE NATURAL GAS PURIFICATION PLANTS FROM MECHANICAL IMPURITIES." НАУЧНЫЙ ЖУРНАЛ СТРОИТЕЛЬСТВА И АРХИТЕКТУРЫ, no. 3(59) (October 1, 2020): 32–42. http://dx.doi.org/10.36622/vstu.2020.59.3.003.

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Состояние проблемы. В настоящее время отсутствует методика расчета степени засорения многослойного фильтрующего картриджа, учитывающая недопущение осаждения механических примесей в зазоре между цилиндрическими фильтрующими картриджами грубой и тонкой очистки. В этой связи разработка такой методики является актуальной задачей. Результаты. В данной работе предложена методика расчета по определению среднеинтегральной степени засорения многослойных цилиндрических фильтрующих картриджей механическими примесями и потери давления на них, которые учитывают недопущение осаждения механических примесей в

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48

Yang, Juan, Sheng Xin Liu, Qi Fei Hou, Hua Wei Sun, Yu Fu Sun, and Shao Kang Guan. "Effect of Ar Purification on Microstructure and Properties of High Strength Gray Cast Iron." Advanced Materials Research 266 (June 2011): 241–45. http://dx.doi.org/10.4028/www.scientific.net/amr.266.241.

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The effects of Ar purification on the impurity characteristic, graphite morphology and quality indexes of high strength gray cast iron were investigated by microstructures analysis and mechanical properties examination. The results show that there are a large amount of particles and floccule impurities in the specimens without Ar purification. The granular impurities usually have been incorrectly considered as “C-type” graphite observed by optical microscopy in the metallographic examination in the practical production of small and medium high strength gray cast iron castings. The amount of im

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49

Ismayilov, F. S., and N. M. Mammadzade. "Seperation of mechanical impurities in gathering-transportation system of oil-gas wells and solids in the reservoirs of produced water." Azerbaijan Oil Industry, no. 03 (March 15, 2022): 44–48. http://dx.doi.org/10.37474/0365-8554/2022-03-44-48.

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The presence of mechanical impurities in the output produced from oil-gas wells is the reason for contamination with sediments at the bottom of transportation pipelines and technological equipment, for the breakdown of moving mechanical parts due to the friction and environment contamination with petroleum wastes as a result of leakages. Installing sand separators at the entry to the reservoirs and pipelines enables separation of mechanical impurities flowing with well output and gather in the sand trap for utilization. For deeper and faster separation of petroleum solids from water in the res

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50

Ying-Heng Yeo and Kin-Sam Yen. "Impurities Detection in Intensity Inhomogeneous Edible Bird’s Nest (EBN) Using a U-Net Deep Learning Model." International Journal of Engineering and Technology Innovation 11, no. 2 (2021): 135–45. http://dx.doi.org/10.46604/ijeti.2021.6891.

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As an important export, cleanliness control on edible bird’s nest (EBN) is paramount. Automatic impurities detection is in urgent need to replace manual practices. However, effective impurities detection algorithm is yet to be developed due to the unresolved inhomogeneous optical properties of EBN. The objective of this work is to develop a novel U-net based algorithm for accurate impurities detection. The algorithm leveraged the convolution mechanisms of U-net for precise and localized features extraction. Output probability tensors were then generated from the deconvolution layers for impuri

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