Aspects of the Aerodynamics in the Working Space of a Modern Electric-Arc Steelmaking Furnace

Voronov, G. V.; Antropov, M. V.; Porokh, O. V.

doi:10.1007/s11148-014-9709-9

Cited by 4 publications

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“…Figure 1b shows the location of the isotherms for the variant of gas-oxygen burner installation proposed by the authors in [3,4]. Temperature conditions in the volume of the working space of the furnace were ordered and were similar to the distribution of the aerodynamic flows [4].…”

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“…Convective heat transfer is functionally dependent on the velocity and kinematic viscosity of the combustion products and the conditions of their aerodynamic interaction with the heat-receiving surface. The main methods used to supply heat by means of gas-oxygen burners on existing furnaces and the furnaces now being designed are not entirely efficient from the standpoint of the heat-exchange conditions that are created [3]. In order to establish a uniform temperature field on the surface of the charge between the electrodes and the inside surface of the furnace walls, the scheme (method) used to install the energy-delivering elements will need to be altered in accordance with the recommendations made in [3,4].…”

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“…Use of the tangential burner installation scheme that we proposed changed the trajectory of the flows of combustion products [3] and thus also changed the temperature distribution 99t volume of the furnace. The horizontal circulation of the gases has made convective heat transfer more efficient and helped make the temperature distribution more uniform on the surface of the charge and throughout the height of the furnace's working space (Figs.…”

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Temperature Conditions in the Working Space of a Modern Electric-Arc Steelmaking Furnace

et al. 2015

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The temperature distribution in the working space of an electric-arc steelmaking furnace built by the company "Danieli" and equipped with radially positioned fuel-burning devices is analyzed. It is concluded that the temperature field is quite nonuniform, and the suggestion is made to reposition the gas-oxygen burners into a tangential configuration. Computer modeling is used to determine the temperature distribution in the furnace's working space for radially and tangentially arranged burners.

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Temperature Conditions in the Working Space of a Modern Electric-Arc Steelmaking Furnace

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“…In the first model, FCD location was chosen in accordance with a design developed by the company "Danieli" (variant A). In the second model, the FCDs were positioned in accordance with the recommendations made in [1] based on the results of a graphical analysis of the propagation of gas flows in a furnace (variant B). The quantities chosen as the input parameters of the models were the velocity of the gas-oxygen mixture at the outlet of the burner nozzle and the balance value of the combustion temperature.…”

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Gas Dynamics in the Working Space of a Modern Electric-Arc Steelmaking Furnace

2015

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Results are presented from an analysis of the motion of gas flows created by fuel-burning devices in existing electric-arc steelmaking furnaces and recommendations are made on how to efficiently arrange this equipment in the furnace. Controlled annular motion of the aerodynamic flows in the part of the working space between the furnace wall and the electrodes increases convective heat transfer to the cold solid charge, forms a reliable and uniform slag crust on the water-cooled wall, and alleviates the deposition of process dust on the electrodes. A numerical study is performed using the SolidWorks Flow Simulation program and boundary conditions that reflect the actual operating conditions in the furnaces.Improving the gas dynamics in the working space of modern electric-arc steelmaking furnaces (EAFs) to provide for efficient heat transfer and rapid, uniform heating of the charge over the entire surface of the bath is a technically complex problem. Experience in the operation of EAFs shows that optimizing the arrangement of the fuel-combustion devices (FCDs) is an empirical undertaking. Any changes that need to be made to the locations of the FCDs have already been incorporated into the design of new prototypes, and the expediency of those changes are evaluated based on the results obtained from the furnaces' operation. The potential for putting new ideas to practical use on existing furnaces is always limited, and conducting experimental studies requires large amounts of time to prepare for and coordinate the necessary operations. In the investigation discussed in this article, the above problem was addressed through computer modeling and engineering analysis.We used a 3D model of the furnace (Fig. 1) that was previously constructed in the chart-and-graphics editor of the system KOMPAS-3D and then imported into the supplemental software of the program SolidWorks Flow Simulation to calculate the gas dynamics of the furnace's working space.Models differing in the locations of the FCDs were examined. In the first model, FCD location was chosen in accordance with a design developed by the company "Danieli" (variant A). In the second model, the FCDs were positioned in accordance with the recommendations made in [1] based on the results of a graphical analysis of the propagation of

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“…Авторами была предпринята попытка исследования тепловой работы печи первоначально с использованием материального, элементного и теплового баланса. Затем, используя компьютерное моделирование, был выполнен сравнительный анализ аэродинамических потоков и температурного состояния в холодной зоне шихтовых материалов действующей ДСП и даны рекомендации по их изменению [7].…”

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Aerodynamics and Temperature Field Features in the Modern Eaf Workspace

Voronov¹,

Гольцев²,

Glukhov³

2015

Izv. vysš. učebn. zaved., Čern. metall.

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Аннотация. Представлены результаты анализа материального, элементного по кислороду и теплового балансов рабочего пространства современной дуговой сталеплавильной печи емкостью 120 т. Показано, что приход теплоты при окислении железа и других компонентов шихты настолько значителен, что тепловой режим и технологический процесс в целом приобретают признаки автогенного. Существенные потери с химическим недожогом свидетельствуют о неудовлетворительной организации аэродинамических потоков в объе ме рабочего пространства печи. С использованием компьютерной программы SolidWorks Flow simulation рассмотрены аэродинамические потоки и температурные поля в зоне нахождения холодной шихты, расположенной между электродами и внутренней поверхностью стены печи. Рекомендован рациональный способ установки газокислородных горелок, фурм подачи кислорода и эжекторов для ввода углеродсодержащих материалов в ванну печи.

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Aspects of the Aerodynamics in the Working Space of a Modern Electric-Arc Steelmaking Furnace

Cited by 4 publications

References 0 publications

Temperature Conditions in the Working Space of a Modern Electric-Arc Steelmaking Furnace

Temperature Conditions in the Working Space of a Modern Electric-Arc Steelmaking Furnace

Gas Dynamics in the Working Space of a Modern Electric-Arc Steelmaking Furnace

Aerodynamics and Temperature Field Features in the Modern Eaf Workspace

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