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Journal articles on the topic 'Distributing channel furnace'

Author: Grafiati

Published: 30 May 2022

Last updated: 31 July 2025

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1

Kuzmin, Ilya V., Anton Yu. Leshchenko, Sergey V. Pavlov, Rinat N. Shamsutdinov, and Yuriy S. Mochalov. "Test bench for gas-dynamic studies in the furnace channel for nuclear fuel pellet sintering." Nuclear Energy and Technology 5, no. (2) (2019): 171–75. https://doi.org/10.3897/nucet.5.36479.

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Nuclear fuel pellets are sintered in high-temperature furnaces in an atmosphere with strictly defined requirements for the composition of the gas environments in the furnace's different temperature zones. The preset process conditions in the mixed nitride uranium-plutonium (MNUP) fuel pellet sintering furnace is achieved through the respective gas supply arrangement and by the design of the barriers between the temperature zones and that of the gas supply and discharge units. A CFD model was created in the Ansys Fluent package and validated for testing the functionality of the design concepts

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Kuzmin, Ilya V., Anton Yu Leshchenko, Sergey V. Pavlov, Rinat N. Shamsutdinov, and Yuriy S. Mochalov. "Test bench for gas-dynamic studies in the furnace channel for nuclear fuel pellet sintering *." Nuclear Energy and Technology 5, no. 2 (2019): 171–75. http://dx.doi.org/10.3897/nucet.5.36479.

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Nuclear fuel pellets are sintered in high-temperature furnaces in an atmosphere with strictly defined requirements for the composition of the gas environments in the furnace’s different temperature zones. The preset process conditions in the mixed nitride uranium-plutonium (MNUP) fuel pellet sintering furnace is achieved through the respective gas supply arrangement and by the design of the barriers between the temperature zones and that of the gas supply and discharge units. A CFD model was created in the Ansys Fluent package and validated for testing the functionality of the design concepts

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3

Yang, Li Jun, Yue Jun Zhang, Tian Ran Feng, and Feng Wu. "Refining Slag Treatment with Flotation Cell." Advanced Materials Research 878 (January 2014): 330–37. http://dx.doi.org/10.4028/www.scientific.net/amr.878.330.

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In past years, the exploitation of mineral resource in our country was stressed on capacity and the solid waste recycle and innocent treatment was ignored. Much valuable metal is associated and coexist with waste, it is in difficult position for present technology to recycle valuable composition in that waste, which leads to valuable component loss and environment pollution. Therefore, the development and utilization of copper refining slag is in significance. In this paper, the advantages and difficulties to process refining slag by flotation method are discussed based on property analysis of

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4

Goryslavets, Yu M., O. I. Gluhenky, and V. I. Zalozny. "MODELING OF ELECTROMAGNETIC PROCESSES IN INDUCTION CHANNEL FURNACES TAKING INTO ACCOUNT METAL FRAMES." Praci Institutu elektrodinamiki Nacionalanoi akademii nauk Ukraini 2023, no. 64 (2022): 64–69. http://dx.doi.org/10.15407/publishing2023.64.064.

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On the basis of the formulated mathematical model for the study of electromagnetic processes in a two-phase (two-inductor) induction channel furnace, electrical losses in the metal frameworks of the furnace were calculated for vari-ous options for their sectioning. The influence of the phase angle between the voltages feeding the inductors of the fur-nace on the distribution of specific and integral losses in the frames is determined. Practical recommendations for re-ducing these losses in order to increase the efficiency of melting furnaces are presented. Ref. 5, fig. 5.

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5

Dmytrochenkova, E., and K. Tadlya. "ANALYSIS OF AERODYNAMIC CHARACTERISTICS IN THE TUNNEL KILN CHANNEL WHEN CHANGING THE GEOMETRIC CHARACTERISTICS OF THE CHANNEL." Innovative Solution in Modern Science 6, no. 33 (2019): 37. http://dx.doi.org/10.26886/2414-634x.6(33)2019.3.

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The article is devoted to the analysis of the influence of tunneling channel height change on its aerodynamic characteristics by modeling the velocity and pressure distribution of air and furnace gases. Three variants of the tunnel geometry were considered: basic, with reduced height in the firing zone and with reduced height along the entire length of the furnace. The simulation results in the dependence of the static pressure along the length of the furnace and the velocity of the furnace gas moving along its height. The analysis of the change in the velocity of the furnace gases in the tunn

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6

Stuk, T. S., and E. P. Pototskii. "Estimation of accident rate of blast furnace tuyeres." Izvestiya. Ferrous Metallurgy 67, no. 2 (2024): 148–54. http://dx.doi.org/10.17073/0368-0797-2024-2-148-154.

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In modern blast furnace production, even a short-term disruption of the technological process is associated with large productivity losses. In the practice of conducting blast furnace melting, there are often significant deviations from the optimal mode. They can lead not only to disruptions of the blast furnace, but also to accidents. In the operation of a blast furnace, typical deviations from the normal distribution of gas flow and charge materials include: peripheral, axial, channel passages; skewing of the backfill level; varying degrees and types of charge suspension. As a result, there

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7

Li, Haifeng, Tengfei Qi, and Yongjie Zhang. "Effect of Furnace Structure on Burden Distribution and Gas Flow in Sinter Vertical Cooling Furnace." Applied Sciences 13, no. 20 (2023): 11268. http://dx.doi.org/10.3390/app132011268.

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Sinter sensible heat recovery via a vertical cooling furnace is a new type of waste heat recovery process proposed based on coke dry quenching. However, the segregation of the burden in a vertical cooling furnace is serious, resulting in a large amount of cooling gas escaping from the short-circuit channel of the vertical cooling furnace, which seriously affects the uniform gas–solid heat transfer in the furnace. To improve the burden distribution and gas flow in such a furnace, this paper proposes a Venturi-type vertical cooling furnace. Based on the single silo of a vertical cooling furnace

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8

Shcherba, A. A., O. D. Podoltsev, Y. V. Peretiatko, V. M. Zolotarov, and R. V. Bilianin. "CALCULATION OF ELECTROTHERMAL PROCESSES IN THE INDUCTION CHANNEL FURNACE IN THE STEADY-STATE OPERATION BASED ON THE THEORY OF THERMAL CIRCUITS." Praci Institutu elektrodinamiki Nacionalanoi akademii nauk Ukraini 2021, no. 60 (2021): 5–11. http://dx.doi.org/10.15407/publishing2021.60.005.

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Based on the theory of thermal circuits, a computer model of an induction channel furnace has been developed, which is used to obtain industrial copper wire rods in the mode of continuous casting. The model allows calculating the established electrothermal processes considering the flows of cold and molten metal in its core. In the developed thermal model, it is proposed to consider the convection fluxes of heat in the metal using controlled current sources. The temperature distribution in the active zone of the channel furnace is calculated, and the influence of the mass flow of metal at the

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9

Zhou, Heng, Zhi Guo Luo, Tao Zhang, et al. "3D Numerical Simulation of the Influence of AGD Beams on Gas Distribution in COREX-3000 Shaft Furnace." Advanced Materials Research 712-715 (June 2013): 1268–73. http://dx.doi.org/10.4028/www.scientific.net/amr.712-715.1268.

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A three-dimensional mathematical model is developed to describe the influence of AGD beams on gas distribution in COREX-3000 shaft furnace. The calculated result shows that with AGD beams installed, the pressure drop in furnace is decreased while the volume of low velocity zone at bottom of furnace is enlarged. AGD channels can lead reduction gas into shaft center, and increase the gas velocity at slots level, but it have little effect on gas distribution at upper part of the furnace. AGD beams are also good at restraining down pipe gas, and the volume fraction of down pipe gas declines from 9

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10

PARSUNKIN, BORIS N., SERGEY M. ANDREEV, and ELENA YU MUKHINA. "EXTREME-OPTIMAL AUTOMATED CONTROL FOR CONCAST BILLET HEATING IN THROUGH-FEED FURNACES." Cherepovets State University Bulletin 5, no. 104 (2021): 22–34. http://dx.doi.org/10.23859/1994-0637-2021-5-104-2.

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This article deals with a strategy of advanced extreme-optimal high-output energy-saving uniform exploratory control for the heating of concast slabs under the broad hot-rolling mill working modes with unsteady outputs to achieve guaranteed metal heating. The implemented advanced extreme-optimal exploratory control development strategy for production processes is analyzed using the specific example of efficient guaranteed optimum control of the heating parameters in through-feed furnaces. We review the best variational and exploratory extreme control methods for three interrelated heating proc

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Penkovyi, T. O., A. A. Khalatov, and Y. M. Goryslavets. "SIMULATION OF HYDRODYNAMIC AND THERMAL PROCESSES IN A REVERBERATORY FURNACE WITH A VORTEX FLOW CHAMBER." Thermophysics and Thermal Power Engineering 45, no. 1 (2023): 84–90. https://doi.org/10.31472/ttpe.1.2023.10.

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The problem of aluminum recycling in the Ukraine is particularly important problem due to the lack of primary production of the raw material in the country. Therefore for the aluminum production the reverberatory furnaces are used. The interesting solution, allowing reduce the amount of metal burned on the surface of liquid metal during melting. For this purpose, lightweight metal is grinded and then is melted in the vortex flow of liquid metal. The disadvantage of existing system with vortex flow of metal is application of the centrifugal mechanical pump, reducing the reliability and service

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Shi, Shengxian, Linlin Sun, Yinsen Luan, Rui Wang, and T. H. New. "Design and evaluation of a light-field multi-wavelength pyrometer." Review of Scientific Instruments 93, no. 11 (2022): 114901. http://dx.doi.org/10.1063/5.0119009.

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This letter describes the design and implementation of a multi-wavelength light-field pyrometer, where six-channel radiation images were captured with one CMOS sensor. Such capability is achieved by placing a 2 × 3 filter array in front of the main lens of an unfocused light-field camera, such that discrete wavelength and radiation intensity can be simultaneously recorded. It demonstrates that through black-body furnace experiments, how multi-channel radiation images can be extracted from one raw light-field multispectral image, and how accurate 2D temperature distribution can be recovered by

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13

Dou, Weixue, Zexi Yang, Ziming Wang, and Qiang Yue. "Molten Steel Flow, Heat Transfer and Inclusion Distribution in a Single-Strand Continuous Casting Tundish with Induction Heating." Metals 11, no. 10 (2021): 1536. http://dx.doi.org/10.3390/met11101536.

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The electrical magnetic field plays an important role in controlling the molten steel flow, heat transfer and migration of inclusions. However, industrial tests for inclusion distribution in a single-strand tundish under the electromagnetic field have never been reported before. The distribution of non-metallic inclusions in steel is still uncertain in an induction-heating (IH) tundish. In the present study, therefore, using numerical simulation methods, we simulate the flow and heat transfer characteristics of molten steel in the channel-type IH tundish, especially in the channel. At the same

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14

Kulessa, Bernd, Beverly Chiarulli, Paul McCarthy, Susanne Haney, and Kevin Jones. "Large-scale geophysical reconstruction of man-made ground at former industrial iron-furnace plantations." GEOPHYSICS 71, no. 3 (2006): B55—B61. http://dx.doi.org/10.1190/1.2194902.

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Blast-iron-furnace plantations were widespread throughout colonial and postcolonial America and therefore represent sites of specific archaeological interest. Because such plantations often were a really extensive, historical reconstruction of a site is challenging using conventional archaeological field techniques alone. Therefore, we appraise the usefulness of integrating magnetic gradiometer, electrical-resistivity tomography (ERT), and electromagnetic (EM31) data in detecting and delineating buried structures related to former operation of the Shade furnace, a typical industrial plantation

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15

Vafin, D. B., A. A. Mukatdarov, and D. A. Mukatdarova. "Thermal condition in a tunnel brick kilning kiln with vocculated burners." Power engineering: research, equipment, technology 26, no. 3 (2024): 184–93. http://dx.doi.org/10.30724/1998-9903-2024-26-3-184-193.

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Despite the large volume of large-panel and monolithic construction in modern cities, the level of aesthetic requirements for house construction using new finishing building materials also leads to an increase in the demand for ceramic bricks. To solve the problem of the national project “affordable housing” it is necessary to increase the production of locally produced ceramic bricks. To do this, it is necessary to modernize existing brick factories or build new ones. In this case, it is desirable to use new technologies and production methods that ensure the quality of the produced bricks. T

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16

Xia, Xiangbin, Shijun Li, Derong Luo, et al. "Electric-Thermal Analysis of Power Supply Module in Graphitization Furnace." Energies 17, no. 17 (2024): 4251. http://dx.doi.org/10.3390/en17174251.

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Graphite, a key anode material in lithium-ion batteries, primarily relies on the Acheson graphitization furnace (AGF) for production. This research focuses on the power supply module of the AGF, particularly the electrodes and their power transmission clamps. A three-dimensional transient electric-thermal-fluid coupling model was developed to numerically analyze the temperature and electric field distributions during operation. The study revealed that heat conduction through furnace electrodes dominates temperature rise. Notably, clamping plates within transmission clamps exhibit high temperat

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17

Mešić, Amel. "COMPARATIVE NUMERICAL ANALYSIS OF COAL AND BIOMASS PARTICLE DISTRIBUTION IN AERO-MIXTURE CHANNELS." Journal of Sustainable Technologies and Materials 5, no. 8 (2025): 5–16. https://doi.org/10.57131/jstm.2025.08.2.

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&lt;p&gt;To analyze the co-combustion process of coal and biomass in a steam boiler furnace originally designed for pulverized coal combustion, it is crucial first to investigate the dynamic behavior of particles within the aero-mixture channels. Due to differences in material properties and particle size distributions, the behavior of coal and biomass particles can vary significantly. This study numerically models particle dynamics using a simulation approach based on a previously validated Euler-Lagrange computational fluid dynamics (CFD) model. The simulation results reveal key diff

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18

Тарасов, Вячеслав Кирилович, Владислав Ростиславович Румянцев, Оксана Володимирівна Новокщонова та Інна Олександрівна Ткаліч. "РОЗРОБКА ЗАХОДІВ ПОКРАЩЕННЯ УМОВ ПРАЦІ ПРИ ВИРОБНИЦТВІ ЧАВУНУ". Bulletin of the Kyiv National University of Technologies and Design. Series: Economic sciences 121, № 2 (2018): 82–90. http://dx.doi.org/10.30857/2413-0117.2018.2.8.

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The article explores the causes of working environment pollution and identifies the sources of harmful and dangerous emissions in pig iron production, along with searching for rational measures to improve the blast furnace cast house aspiration system efficiency to remove toxic gases, dust and exhaust heat. A mathematical modeling methodology for transfer process of molten iron and slag from the blast furnace to the ladle has been employed. The best practice from Zaporizhstal Steel Works on a new aspiration system at blast furnace casting yard laid the basis for the research. An aerodynamic ca

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19

Schnorr, Manfred. "Trends in design of working and distributing channels of modern kiln furnaces for whole household glasses." Epitoanyag - Journal of Silicate Based and Composite Materials 57, no. 4 (2005): 127–30. http://dx.doi.org/10.14382/epitoanyag-jsbcm.2005.20.

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20

Song, Yueshuai, Rui Zhao, and Min Wan. "Electric Current-Assisted TLP: Bonding of Ultrathin-Walled Inconel 718 Capillaries Temperature Field Simulation and Microstructural Analysis." Journal of Physics: Conference Series 2679, no. 1 (2024): 012015. http://dx.doi.org/10.1088/1742-6596/2679/1/012015.

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Abstract This study achieved the effective bonding of Inconel 718 ultra-thin-walled capillaries by employing a self-designed apparatus and a novel approach involving current-assisted transient liquid phase (TLP) bonding using BNI-2 brazing material in a vacuum environment. During the bonding process, rapid heating and a subsequent period of maintenance were achieved using Joule heating, followed by rapid cooling in the furnace. Compared to the traditional furnace-based TLP bonding, this method significantly improved the bonding efficiency, reduced energy consumption, and minimized the thermal

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21

A., Abdullin. "Numerical Study of Complex Heat Transfer and Aerodynamics in a Tube Furnace with a Flat Fuel Combustion Mode." Bulletin of Science and Practice 10, no. 11 (2024): 119–25. http://dx.doi.org/10.33619/2414-2948/108/15.

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The object of the study is a tubular furnace for steam reforming of natural gas. The channel walls are formed by a refractory lining and a tubular screen with a known temperature. The chamber volume is filled with a selectively radiating, absorbing and weakly scattering medium of gaseous fuel combustion products. The research method is based on the numerical solution of a system of two-dimensional integro-differential equations of radiative gas dynamics, closed by a two-parameter model of turbulent convection. It is shown that when burners are located on the side walls of the radiation chamber

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22

Zhuchenko, Anatolii, and Oleksii Sytnikov. "Investigation of temperature fields of a glass furnace." Proceedings of the NTUU “Igor Sikorsky KPI”. Series: Chemical engineering, ecology and resource saving, no. 2 (June 30, 2022): 34–41. http://dx.doi.org/10.20535/2617-9741.2.2022.260343.

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The pricing policy of the fuel and energy market is constantly growing. The urgency of research is to adjust the optimization of fuel consumption in the glass furnace to obtain the maximum economic effect of production. Using the developed mathematical model of the glass furnace, the analysis was carried out: temperature modes of the furnace, temperature fields of glass and masonry. The temperature distribution in the sections of the glass furnace is performed by means of simulation modeling. The object of research consists of glass mass, gas space, masonry and divided into conditi

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23

Yao, Kuo, Yong Deng, Ran Liu, Lu Liu, Yanjia Gao, and Yanting Liu. "Factors affecting the hearth activity of blast furnace and corresponding measures." Metallurgical Research & Technology 122, no. 2 (2025): 205. https://doi.org/10.1051/metal/2025005.

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To improve the hearth activity and provide a theoretical basis for the blast furnace (BF) smooth operation, this paper introduced indirect indicators of hearth activity, such as the descent of burden, fluctuations in air volume and pressure, hearth temperature, iron tapping conditions, and the heat of slag iron. The factors influencing hearth activity were analyzed, primarily focusing on the permeability provided by deadman, the viscosity of slag iron, and the position and size of the tuyere raceway. Control measures for hearth activity were summarized, including adjusting the permeability pro

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24

Lahaye, Domenico, Mohamed el Abbassi, Kees Vuik, Marco Talice, and Franjo Juretić. "Mitigating Thermal NOx by Changing the Secondary Air Injection Channel: A Case Study in the Cement Industry." Fluids 5, no. 4 (2020): 220. http://dx.doi.org/10.3390/fluids5040220.

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This work studies how non-premixed turbulent combustion in a rotary kiln depends on the geometry of the secondary air inlet channel. We target a kiln in which temperatures can reach values above 1800 degrees Kelvin. Monitoring and possible mitigation of the thermal nitric-oxide (NOx) formation is of utmost importance. The performed reactive flow simulations result in detailed maps of the spatial distribution of the flow, thermodynamics and chemical conditions of the kiln. These maps provide valuable information to the operator of the kiln. The simulations show the difference between the existi

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Cincibusová, Petra, Lubomír Nĕmec, and Jiří Brada. "The Influence of Glass Melt Flow Character on the Bubble Removal Process." Advanced Materials Research 39-40 (April 2008): 419–24. http://dx.doi.org/10.4028/www.scientific.net/amr.39-40.419.

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The high utilization of the melting space for the bubble removal processes asks for the detailed examination of fining space geometry and glass flow character inside the space. The relative significance of the space utilization for fining may be assessed from simplified models of bubble removal from fining spaces. This work demonstrates how the temperature distribution and resulting glass flow patterns in the simple melting space (horizontal channel) affect the character of bubble removal from the melt due to variable utilization of the space for the process. In performed calculations, the fin

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Tungtrongpairoj, Jennarong. "A Microscopic Numerical Simulation of Carbon Dissolution in Different Coke Shapes in the Dripping Zone of Blast Furnace." Key Engineering Materials 856 (August 2020): 8–14. http://dx.doi.org/10.4028/www.scientific.net/kem.856.8.

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The carbon dissolution of coke pieces in hot metal mainly influences the carbon content and carbon saturation temperature in the ironmaking process. The liquid metal and slag start to drop down in the dripping zone (DZ) which is located the lower part of blast furnaces. The dissolution of carbon in liquid metal and slag droplets passing the stagnant hot gas flow in the fixed coke bed of the dripping zone were observed by a multi-droplet model based on the Computational Fluid Dynamics (CFD) method. The uniform-coke pattern was set in the model following the preferred distribution of a one-layer

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Salikhanov, P. A., D. V. Tumanov, A. L. Kuz'minov, V. P. Vinogradov, and A. V. Tsurkan. "Improving the resistance of graphitized electrode by organising argon blowing through the hollow electrode." Ferrous Metallurgy. Bulletin of Scientific , Technical and Economic Information 80, no. 3 (2024): 47–56. http://dx.doi.org/10.32339/0135-5910-2024-3-47-56.

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In consequence of the fact that the main source of heat energy in the ladle furnace is the electric arc between the liquid metal and the electrode candle, there is a significant consumption of graphitized electrodes. Verification of the data confirmed the dependence of electrode mass reduction on the temperature of the contact medium. As a solution to the problem of high temperatures, the supply of inert gas (argon) through the axial opening of the electrode was proposed. From the developed one-dimensional thermophysical model we determined the necessary and sufficient diameter of the axial ch

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Bondzyk, D. L., O. V. Baranyuk, M. V. Vorobyov, M. V. Chernyavskyy, and O. V. Kosyachkov. "CFD-modeling of critical deviations of combustion processes in pulverized coal boilers. Part 1. Construction of the TPP-210A boiler calculation model." Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu, no. 2 (April 30, 2024): 52–59. http://dx.doi.org/10.33271/nvngu/2024-2/052.

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Purpose. Development of a mathematical model for predicting critical deviations of furnace processes during the operation of anthracite boilers converted to burning sub-bituminous coal, including in non-design modes of operation. Verification of the calculation model of the TPP-210A boiler of the 300 MW power unit on the design fuel – anthracite for further analysis of its operation on sub-bituminous coal. Methodology. Modelling of solid fuel combustion was performed with the help of finite-element CFD models of the boiler unit in the ANSYS-Fluent software complex with the determination of the

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Filatov, S. V., A. I. Dagman, S. V. Myasoedov, S. A. Zagainov, and L. Yu Gileva. "Application of computer training systems for qualification perfection of technological personal of blast furnace shops." Ferrous Metallurgy. Bulletin of Scientific , Technical and Economic Information 75, no. 4 (2019): 448–53. http://dx.doi.org/10.32339/0135-5910-2019-4-448-453.

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Effective control of thermal state of a blast furnace (BF), considerably depending on the qualification of the technological personal, is an important condition for smelting of hot metal of required composition. Application of computer training systems (CTS) in the process of education of technological personal of BF shops is one of the effective methods of professional knowledge and skill perfection. The CTS, implemented at PAO NLMK, based on a model of thermal state of BF, elaborated in Ural Federal University and supplemented with the models of existing disturbances. Adjusting of dynamic ch

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С.В., Албул, Кобелев О.А. та Левицкий И.А. "ВЛИЯНИЕ ПОДАЧИ ПРИРОДНОГО ГАЗА ЧЕРЕЗ ОТВЕРСТИЯ ВО ФЛАНЦЕ НА РАБОТУ ВОЗДУШНОЙ ФУРМЫ ДОМЕННОЙ ПЕЧИ С ТЕПЛОИЗОЛИРУЮЩЕЙ ВСТАВКОЙ В ДУТЬЕВОМ КАНАЛЕ". Metallurg, № 8 (29 серпня 2024): 72–78. http://dx.doi.org/10.52351/00260827_2024_8_72.

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Распределение подачи природного газа в дутьевой канал воздушной фурмы с теплоизолирующей вставкой играет положительную роль, с одной стороны, для улучшения смешивания природного газа с дутьем и его горения, с другой, для снижения температурных напряжений во вставке. С помощью системы Ansys проведено математическое моделирование газодинамики, теплообмена и горения природного газа при подаче его в дутьевой канал воздушной фурмы доменной печи через ряд отверстий во фланце. Показано, что подача природного газа в дутьевой канал через отверстия во фланце сопровождается улучшением его горения в фурме

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Lu, Hongguo, Minghui Yang, Li Zhou, et al. "Effects of Heat Treatment on the Microstructure and Properties of a Cast Nickel-Based High-Cr Superalloy." Metals 12, no. 12 (2022): 2176. http://dx.doi.org/10.3390/met12122176.

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The effect of solution treatment and intermediate heat treatment on the microstructure and properties of a new cast nickel-based high-Cr superalloy was investigated in this paper. The results indicate that the tensile strength and elongation at 900 °C increase when the solution temperature increases from 1160 °C to 1180 °C and then decrease when the solution temperature changes from 1180 °C to 1200 °C and 1220 °C. The stress rupture test results of the high-Cr superalloy under conditions of 900 °C/275 MPa shows that the rupture time, elongation, and reduction of area initially increased and th

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Sergeev, Stanislav P., Faddey F. Nikiforov, Sergey V. Afanasiev, and Juliya N. Shevchenko. "HYDRODYNAMICS, DISTRIBUTION OF FLOWS AND THERMAL EFFICIENCY OF COIL HEAT EXCHANGERS IN UNITS OF HEAT-USING APPARATUS OF TUBE FURNACES." IZVESTIYA VYSSHIKH UCHEBNYKH ZAVEDENII KHIMIYA KHIMICHESKAYA TEKHNOLOGIYA 62, no. 4 (2019): 143–51. http://dx.doi.org/10.6060/ivkkt.20196204.5734.

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The theoretical foundations of construction, mathematical description and engineering calculation of heat exchangers of the serpentine type in blocks of heat-using equipment of tube furnaces and other types of reactors designed for carrying out endothermic reactions (in particular, reforming of natural gas with water vapor) are considered. It is shown that the thermal efficiency of heat exchangers of the coil type is significantly affected by the correct choice of parameters ensuring a uniform distribution of energy flows over the surface of heat-resistant heat exchange tubes. This technologic

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Karasev, Timofey O., and Anatoly V. Perminov. "Numerical modeling of liquid magnesium convection in a titanium reduction apparatus with consideration of effective boundary conditions." ВЕСТНИК ПЕРМСКОГО УНИВЕРСИТЕТА. ФИЗИКА, no. 4 (2022): 5–17. http://dx.doi.org/10.17072/1994-3598-2022-4-05-17.

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We investigate the numerical problem of conjugate heat exchange between liquid magnesium, a steel retort, and the air-cooling zone of the titanium sponge reduction reactor furnace at the initial stages of production. The uneven distribution of heat fluxes on the side surface of the retort significantly affects the formation of convective turbulent flow inside the apparatus. The accurate consideration of thermal boundary conditions will make it possible to adequately solve the problem of heat and mass transfer in the reactor without using model representations of heat flows on the boundaries of

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Abrantes, Yuri Gomes, Lucas Silva de Medeiros, Ana Beatriz Alves Bennemann, et al. "Geographic distribution and conservation of seasonal killifishes (Cyprinodontiformes, Rivulidae) from the Mid-Northeastern Caatinga ecoregion, northeastern Brazil." Neotropical Biology and Conservation 15, no. 3 (2020): 301–15. http://dx.doi.org/10.3897/neotropical.15.e51738.

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The Rivulidae fish family, which includes Neotropical seasonal killifishes, is one of the most diverse taxonomic groups in the aquatic systems of Caatinga in Brazil. Cynolebias and Hypsolebias genera, with 20 and 35 endemic species, respectively, concentrate the greatest diversity of rivulid species in the semiarid. Sixty-eight years after the first records of annual killifishes in the Mid-Northeastern Caatinga ecoregion (MNCE), only four valid species have been sampled in this area. Here we combined bibliographic surveys and recent samplings to investigate the distribution of seasonal rivulid

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Kumar, Pawan, Mamookho Elizabeth Makhatha, Shivashankarayya Hiremath, and Vishwanatha H. M. "The Casting and Hot Forging of Low-Carbon Copper-Bearing Steel and Its Substructural Characterization." Journal of Composites Science 7, no. 10 (2023): 414. http://dx.doi.org/10.3390/jcs7100414.

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The casting of metal alloys followed by hot forging is a widely used manufacturing technology to produce a homogeneous microstructure. The combination of mechanical and thermal energy envisages the microstructural properties of metal alloys. In the present investigation, a metal alloy of composition 0.05C-1.52Cu-1.51Mn (in weight %) was cast in an induction furnace using a zirconia crucible. The melt pool was monitored using optical emission spectroscopy (OES) to maintain the desired composition. The as-cast block was then subjected to forging under a pneumatic hammer of 0.5 t capacity so that

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Zuev, Ivan V., Pavel Yu Andrushchenko, Nikita O. Yablokov, Dmitriy V. Dementiev, and Tatiana A. Zotina. "Identification of sedentary and migrating graylings in the Yenisei River using scales." Vestnik Tomskogo gosudarstvennogo universiteta. Biologiya, no. 56 (2021): 152–69. http://dx.doi.org/10.17223/19988591/56/7.

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The regulation of river flow by dams of hydroelectric power plants (HPPs) has a significant impact on the populations of migratory fish species, preventing their movement between the upstream and downstream sections. Violation of the level and thermal regime of the river in the downstream of the HPP can also lead to a modification of the migration process, both within the main channel and between the main channel and its adjoining system. It is assumed that after the construction of the dam of Krasnoyarsk hydroelectric power station, a significant part of the population of the Baikal grayling

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Hamon, Caroline, Solenn Reguer, Vérane Brisotto, et al. "Des outils de métallurgistes dans le Bronze ancien de Bretagne ? Révéler le rôle du macro-outillage lithique en associant analyses tracéologiques et de spectroscopie de fluorescence X." Bulletin de la Société préhistorique française 118, no. 4 (2021): 697–737. http://dx.doi.org/10.3406/bspf.2021.15250.

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The question of the emergence and development of copper and bronze metallurgies is a major issue in addressing the cultural and economic dynamics of the late Neolithic and early Bronze Age in Western Europe. This phenomenon is particularly relevant along the Atlantic coast, where the Armorican peninsula is central for better understanding how the control of these new productions contributed to the emergence of new elites and their chiefs, notably within the Armorican Tumulus culture (2150-1750 BC). However, evidence of Early Bronze Age mining activities and metallurgical production workshops r

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Ephrem, Brice, Philippe Duprat, Marielle Bernier, et al. "La villa gallo-romaine des Chapelles à Port-des-Barques (Charente-Maritime) : acquis et perspectives de recherche sur une économie entre terre et mer." Aquitania : une revue inter-régionale d'archéologie 38, no. 1 (2022): 83–174. https://doi.org/10.3406/aquit.2022.1659.

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The Chapelles villa in the locality of Grand Fief Chagnaud at Port-des-Barques (Charente-Maritime, Nouvelle-Aquitaine) lies in a remarkable location on a spit of land overlooking the mouth of the River Charente on one side and the Gulf of Brougage on the other. In Roman times, this rural settlement lay in the lands of the Santones whose main city was Saintes. The site has long been known of and surveys and partial excavations made between 1957 and 1999. The plan of the villa appears to be almost complete (fig. 6) with its residential and working parts. Three buildings bounded a vast unconstruc

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Piękoś, M., and Z. Smorawiński. "Introduction of Powder Fluxes in Rotary Degassing System Towards Intensifying Refining Process of Aluminium Alloys." Archives of Foundry Engineering, December 23, 2024. https://doi.org/10.24425/afe.2024.151315.

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This paper presents and describes the research capabilities of a prototype experimental bench for realising the composite processing of liquid aluminium alloys by involving gas refining by rotary degassing technology and refining with salts (fluxes) in powder form. The constructed unit was installed in the Experimental Foundry of the Faculty of Foundry Engineering at AGH in the Department of Moulding Processes, Mould Technology, and Non-Ferrous Metals Foundry; it is an integral part of a thyristor-based medium-frequency induction furnace with a melting capacity of up to 60 kg for aluminium all

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Zeng, Tongyan, Essam Abo-Serie, Manus Henry, and James Jewkes. "Cooling channel free surface optimisation for additively manufactured casting tools." International Journal of Advanced Manufacturing Technology, May 26, 2023. http://dx.doi.org/10.1007/s00170-023-11402-4.

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AbstractIn the present study, an algorithm has been developed using the adjoint method to optimise the position and cross-section of an internal cooling channel for a 3D printed tool steel insert for use in the aluminium die-casting process. The algorithm enables the development of an optimised complex industrial mould with relatively low computational cost. A transient model is validated against multiple experimental trials, providing an adapted interface heat transfer coefficient. A steady state thermal model, based on the casting cycle and thermal behaviour at the mould surface, is develope

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Kuehne, J., S. Hattangady, J. Piccirillo, et al. "Nitrogen Profile Engineering in Thin Gate Oxides." MRS Proceedings 525 (1998). http://dx.doi.org/10.1557/proc-525-181.

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ABSTRACTIn order to prevent boron penetration in PMOS transistors without degrading channel mobility, it is necessary to engineer the distribution of nitrogen introduced into the gate oxide. We have investigated methods of engineering this distribution using nitric oxide (NO) gas in an RTP system to thermally nitride ultra-thin gate oxides. In one approach, the gate oxide is simultaneously grown and nitrided in a mixture of nitric oxide and oxygen. For a 40 Å film, SIMS depth profiling shows that this process moves the nitrogen peak into the bulk of the oxide away from the oxide silicon interf

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Zhang, Haijie, Yunxing Zhao, Wei Xiong, et al. "Modelling freckles and spurious grain formation in directionally solidified superalloy castings." Communications Materials 5, no. 1 (2024). http://dx.doi.org/10.1038/s43246-024-00672-4.

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AbstractSegregation channels with misoriented spurious grains, known as freckles, are an unacceptable casting defect in superalloy turbine blades. A digital-twin method to predict segregation channels was proposed in our previous studies; however, the formation of spurious grains was ignored. Here, we extend the digital twin methodology by incorporating dendrite fragmentation, which is recognized as the predominant mechanism in the formation of spurious grains. The flow-induced fragmentation process has been refined to account for the timing of dendrite pinch-off. A three-phase mixed columnar-

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TEH, T. Y. "The unprsendant farmland soil monitoring project and feasible remediaiton approach in Taiwan." Sustainable Forestry 1, no. 3 (2018). http://dx.doi.org/10.24294/sf.v1i3.884.

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Soil and groundwater remediation Act was enacted in year 2000. More than ten years has already passed, Monitoring project has been completed,pollution status has been defined,contaminated sites depollution have been launched,a great progress has been made. This paper majorly to depict the extensive farmland soil qauality monittoring which is unpredent in Taiwan and believe has never been done worldwide. This project was initiated from February 8th, 2002 to August 8th, 2002. The project tasks including digitalization of cadastre, farmland listing, basic information collecting, field investigati

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Pfaff, Gerhard. "Carbon black pigments." Physical Sciences Reviews, April 21, 2021. http://dx.doi.org/10.1515/psr-2020-0152.

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Abstract Carbon black pigments are manufactured today mainly by modern chemical processes in industrial scale production. They are the most important representatives of black pigments. Carbon black pigments have a number of advantages compared with other inorganic black pigments and with black organic colorants. Hiding power, color stability, solvent resistance, acid and alkali resistance as well as thermal stability are excellent good properties that are not achieved from other blacks. Carbon black pigments are applied in most of the pigment relevant systems, such as printing inks, paints and

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Cho, Seongkyu, Leonardo Tomas Da Rocha, Seong-Jin Kim, Dohyeon Kim, and Sung-Mo Jung. "Effect of iron ore type on the reduction behavior at multi-stage reduction by H₂." Ironmaking & Steelmaking: Processes, Products and Applications, September 12, 2024. http://dx.doi.org/10.1177/03019233241274064.

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The fluidised bed reduction process is noted as one of the representative clean ironmaking process to replace the blast furnace. Since the multi-stage fluidise bed reduction process operate without sintering, it is necessary to clarify the effect of iron ore properties on the reduction behaviour. The current study employed the thermogravimetric analyses to characterise the four-stage reduction of four kinds of iron ores which are classified by phase of iron oxide and gangue amount. At the first reduction stage where iron ores are reduced to magnetite, iron ore of larger surface area showed hig

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