Fuel Arc Furnace (FAF) for Effective Scrap Melting

Toulouevski, Yuri N.; Zinurov, I. Yu.

doi:10.1007/978-981-10-5885-1

Cited by 13 publications

(12 citation statements)

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“…According to Eq. (19), 35,36) when the bulk density is about 0.74 t•m − 3 , the corresponding porosity of steel scrap is about 0.91. As can be seen from Fig.…”

Section: Establishment Of Equivalent Modelmentioning

confidence: 99%

“…(18). 35,36) The left side of Eq. (18) indicates the heat obtained by steel scrap in time τ, and the right side indicates the heat consumption for melting the steel scrap at a temperature of t av .…”

Section: Calculation Model For Melting Time Of Steel Scrap In Electrimentioning

confidence: 99%

“…However, in the actual arc furnace smelting process, steel scrap is continuously charged into the quite limited zone of steel bath, which is no more than 2.5 to 3.0 m 3 . 35) Therefore, it is impossible for the porosity between steel scrap to be 1. Zhu et al 37) showed that when the bulk density of steel scrap in the EAF is about 0.74 t•m − 3 , the melting rate is the fastest.…”

Section: Establishment Of Equivalent Modelmentioning

confidence: 99%

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Melting Characteristics of Multipiece Steel Scrap in Liquid Steel

Chen

Yang

et al. 2021

ISIJ Int.

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Based on the analysis of single-bar melting experiments in a previous article, 1) the effect of spacing between the steel bars on the agglomeration of steel shells around the steel bars and the melting rate of steel scrap samples was studied in this article. In addition, a calculation model of melting time of steel scrap in the electric arc furnace under different bulk densities and random stacking conditions was also established. The two-bar melting experimental results show that the thermal simulation results are basically consistent with the numerical simulation results. And an increase in the spacing between the steel bars up to 6 mm and the preheating temperature of the steel scrap samples up to 1 073 K, can greatly reduce or eliminate the adverse effect of the agglomeration of steel shells around the steel bars on the melting process, thus greatly reducing the melting time. The multibar melting experimental results show that an increase in the porosity is beneficial to the melting of steel scrap samples, and when the porosity reached 0.84 and above, the melting time of multibar samples is close to that of an individual steel bar. In addition, the calculation model can accurately predict the melting time of the steel scrap in the electric arc furnace.

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“…According to Eq. (19), 35,36) when the bulk density is about 0.74 t•m − 3 , the corresponding porosity of steel scrap is about 0.91. As can be seen from Fig.…”

Section: Establishment Of Equivalent Modelmentioning

confidence: 99%

Section: Calculation Model For Melting Time Of Steel Scrap In Electrimentioning

confidence: 99%

Section: Establishment Of Equivalent Modelmentioning

confidence: 99%

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Melting Characteristics of Multipiece Steel Scrap in Liquid Steel

Chen

Yang

et al. 2021

ISIJ Int.

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“…A. Vollomy em 1990 como uma tecnologia de alimentação contínua de sucata a qual é préaquecida pelo gás de exaustão do forno [10]. Entretanto, conforme [11] a temperatura média do ar não excede os 250 °C para fornos de capacidade média e é ainda menor para fornos maiores devido à espessura da camada de sucata que chega a alcançar 900 mm, gerando alguns problemas no pré-aquecimento da sucata. Este trabalho visa avaliar um método de melhoria no processo de pré-aquecimento da sucata realizado pelo sistema Consteel® em usinas siderúrgicas integradas, buscando, sobretudo, um ganho na eficiência energética.…”

Section: Introductionunclassified

Aumento Da Eficiência Energética Do Sistema Consteel®

Castro¹,

Marques²

2019

ABM Proceedings

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Resumo A indústria siderúrgica é um setor altamente intensivo em energia e recursos, tendo que lidar com os desafios de aumentar a eficiência energética. O aço é a liga metálica mais utilizada atualmente, sendo utilizado em construção civil, na infraestrutura de transporte, na manufatura de automóveis, bem como no uso militar. Portanto, novas tecnologias mais eficientes, que impactam menos o meio ambiente e reutilizam resíduos industriais, são importantes para o mercado. O presente trabalho sugere uma adaptação do sistema Consteel® em usinas siderúrgicas integradas, buscando, sobretudo, um ganho na eficiência energética. Alguns problemas nessa tecnologia como baixa temperatura e vazão do gás de préaquecimento acabam limitando a taxa de fusão da sucata. Assim sendo, foi proposto um método para utilização dos gases de exaustão do alto forno como fonte complementar de fornecimento de energia, aquecendo a sucata por meio de queimadores de chama. Palavras-chave: Consteel®; Forno elétrico a arco; Eficiência energética.

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“…Some relevant theoretical papers focused on the mechanisms of the different stages of scrap melting and the impact of cold materials on it; Asai studied the effects of temperature and carbon content on the steel scrap melting, Oeters provided a thorough analysis of its dynamics, and Szekely investigated the heat and mass transfer phenomena involved. On the other hand, there are also some experimental studies, mostly on the melting time of steel scraps of different sizes, shapes, temperatures, and oxidation levels; Pehlke studied the melting rate of steel rods scraps at 1300–1650 °C and Li investigated their melting with different sizes, shapes, and preheating temperatures in molten baths at 1650 °C. Numerical simulations were also conducted on the heat transfer state of steel scrap melting to find ways for melting more scraps; Kumar developed a turbulent flow model, a scrap melting model and a chemical reaction model for the scrap melting.…”

Section: Introductionmentioning

confidence: 99%

Analyses and Calculation of Steel Scrap Melting in a Multifunctional Hot Metal Ladle

Deng

Yang

et al. 2018

steel research int.

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To improve the utilization of steel scrap in the steel production process, the authors analyze the feasibility of adding scrap steel into the multifunctional ladle before hot metal tapping. Firstly, the authors provide an overview of the process. Secondly, theoretically study the melting process of scrap steel in the ladle along with the scrap steel melting mechanism is done. Finally, the effects of the addition of different types of scrap steel pretreated at various temperatures are examined using numerical calculation and simulation. The preheating temperature and specific surface area of the scrap steel had important effects on scrap steel melting. For the scrap steel with a specific surface area of 1.6 m 2 t À1 , the melting rate decreased by 4 min t À1 as the preheating temperature was increased from 300 C to 800 C. For a preheating temperature of 800 C, the melting rate increased by 4.5 min t À1 as the specific surface area increased from 3.3 to 26.1 m 2 t À1 . Another 2.2%-6% of scrap steel can be added under certain conditions. This approach provides an effective solution to the problem of melting large amounts of scrap steel in steel works, further increases the utilization of scrap steel during steel production, and reduces the cost of steel production.

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Fuel Arc Furnace (FAF) for Effective Scrap Melting

Cited by 13 publications

References 0 publications

Melting Characteristics of Multipiece Steel Scrap in Liquid Steel

Melting Characteristics of Multipiece Steel Scrap in Liquid Steel

Aumento Da Eficiência Energética Do Sistema Consteel®

Analyses and Calculation of Steel Scrap Melting in a Multifunctional Hot Metal Ladle

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