Computational Fluid Dynamics Modeling of Supersonic Coherent Jets for Electric Arc Furnace Steelmaking Process

Alam, Morshed; Naser, Jamal; Brooks, Geoffrey; Fontana, Andrea

doi:10.1007/s11663-010-9436-7

Cited by 76 publications

(57 citation statements)

References 18 publications

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“…[4][5][6][7][8][9][10][11][12] Tago and Higuchi 4 investigated single and multiple nozzle jet behaviour based on fluid dynamics, and the results showed that the numerical simulations were consistent with experimental results. Odenthal et al 8,9 simulated single nozzle supersonic jet behaviour by CFD modelling based on a steady and compressible mathematical model.…”

Section: Introductionmentioning

confidence: 91%

Effect of operation parameters on supersonic jet behaviour of BOF six-nozzle oxygen lance

Li¹,

Li²,

Li³

et al. 2014

Ironmaking & Steelmaking

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A three-dimensional mathematical model of compressible supersonic free surrounding jets from six convergent-divergent nozzles oxygen lance was developed based on the Reynolds averaged Navier-Stokes equations. The modelling results were validated by experiment. A comparison between the standard kyv turbulence model and realisable kye was carried out, and it shows that the standard kyv turbulence model is superior in being able to depict the flow characters of multiple jets. The effects of nozzle inclination angle and operation pressure on jet flow characteristics and coalescence behaviour were investigated, and the mechanism of jet coalescence is discussed. The results show that coalescence patterns of six nozzle jets are strongly affected by the inclination angle but hardly by the operation pressure. When jets impinge on the melt surface in a BOF, the nozzle inclination angle plays also an important role in the splashing phenomena and the shape of cavity. It can be expected that when the nozzle inclination angle reduces from 17?5 to 10u, the cavities impinged by jets evolve from several scattered small craters to one large cavity. The change of jet coalescence pattern leads to different splashing patterns of the melt.

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Section: Introductionmentioning

confidence: 91%

Effect of operation parameters on supersonic jet behaviour of BOF six-nozzle oxygen lance

Li¹,

Li²,

Li³

et al. 2014

Ironmaking & Steelmaking

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“…Nowadays, the availability of very accurate computational fluid-dynamics is a very powerful modeling tool to support engineers in the conception and selection of the best design solutions [2,3,4]. MORE nozzle for oxygen injection was generated thanks to this advanced approach.…”

Section: The Process Optimization Of the Oxygen Lancingmentioning

confidence: 99%

New Developments and Operational Results in the Use of Fixed Side-Wall Injectors in the Electric Arc Furnaces

Tolazzi¹,

Candusso²,

Marcuzzi³

2017

Anais Do Seminário De Aciaria, Fundição E Metalurgia De Não-Ferrosos

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Electric Arc Furnaces keep evolving into highly powerful melting units, shrinking tapto-tap times by increasing the effectiveness of the energy sources and the material fluxes used in the process. Steelmakers are targeting to increase the efficiency of their injection package in order to reduce the overall conversion costs, seeking for technologies specifically designed to promote the metallurgical reactions in a predictable and reproducible process automatically controlled at the correct timing. Many technological enhancements have focused in the gas management, improving the burner design and the penetration capacity of oxygen injectors, dedicated to decarburization and the other exothermic reactions. Instead, lower evolution efforts have been addressed to engineered solutions for managing the addition of solid materials required in slag forming, although they are playing a key role in EAF process optimization, as well. The paper describes the latest solutions designed to manage efficiently the injection of fuel, oxygen and powdered materials in several EAFs and presents the operational results achieved. Accurate control of reliable additions of coal, lime and magnesia proved crucial for the control of the slag FeO and viscosity, generating stable foamy slag and producing cleaner steel.

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“…O resíduo especificado foi de 10 No modelo de turbulência κ-ε padrão, a viscosidade turbulenta é calculada pela equação 8, onde Cµ é 0.09, constante. No presente trabalho, o modelo de turbulência utilizado foi o modelo κ-ε adaptado para jatos supersônicos em ambientes quentes, sugerido por Alam et al [10] onde, o Cµ é modificado conforme as equações 9, 10, 11 e 12. Assim os efeitos da compressibilidade e temperatura, que afetam o número de Mach, são considerados.…”

Section: Materiais E Métodosunclassified

Desgaste Em Bocais De Lança – Simulações CFD E Condições Reais

Maia¹,

Garajau²,

Barros³

et al. 2017

Anais Do Seminário De Aciaria, Fundição E Metalurgia De Não-Ferrosos

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ResumoMetalurgistas e pesquisadores de aciarias a oxigênio buscam dia após dia o desenvolvimento de parâmetros operacionais com reflexos diretos em ganhos metalúrgicos e no desempenho dos equipamentos, visando aumentar a produtividade e evitando interrupções para manutenção. O principal requerimento para um converterdor a oxigênio é o conjunto de lança com bico de cobre. Recentemente a Lumar Metals apresentou cartuchos com a tecnologia Slagless que podem ser usados para substituir os bicos convencionais de cobre com expressivos resultados de processo. Alguns pontos são fundamentais para se obter um projeto de bico que tenha satisfatória vida útil, como por exemplo, a estrutura do material utilizado, o correto dimensionamento do circuito de refrigeração e o correto dimensionamento dos lavais de saída do oxigênio. O objetivo do presente trabalho é avaliar os efeitos dos parâmetros de processo: pressão e vazão e suas influências no desgaste do bico de lança devido ao mau dimensionamento dos lavais ou quando operando em condições abaixo da especificada. Os resultados mostram que para cada conversor com um perfil operacional único, o projeto do bocal específico é o que garante os melhores ganhos metalúrgicos e aumento da vida útil do bico. Palavras-chave: Bico; CFD; Vazão; Pressão; Contra-pressão. TIP NOZZLE WEAR -CFD SIMULATIONS AND REAL CONDITIONS AbstractSteelmakers and researches in BOF's shops try to find every day better operational parameters with direct metallurgical gains and equipments performance, increase productivity, avoid maintenance time. In BOF, the mainly device are lance and lance tip, specially copper parts. Nearly Lumar Metals showed the cartridge concept called Slagless replacing lance tips and improve gains in life and downtime to clean skulls. Other important point is the lance water cooling system, to keep the structural conditions of the nozzles. This work intends check the effects of process parameters like: pressure and flow and influences at wear due wrong nozzles dimensions when below the correct conditions. The results show that for each converter there is a unique operational profile and then specific nozzle dimensions.

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Computational Fluid Dynamics Modeling of Supersonic Coherent Jets for Electric Arc Furnace Steelmaking Process

Cited by 76 publications

References 18 publications

Effect of operation parameters on supersonic jet behaviour of BOF six-nozzle oxygen lance

Effect of operation parameters on supersonic jet behaviour of BOF six-nozzle oxygen lance

New Developments and Operational Results in the Use of Fixed Side-Wall Injectors in the Electric Arc Furnaces

Desgaste Em Bocais De Lança – Simulações CFD E Condições Reais

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