Modeling of Combustion and Heat Transfer in an Iron Ore Sintering Bed with Considerations of Multiple Solid Phases

Yang, Won Seok; Ryu, Changkook; Choi, Sangmin; Choi, Eungsoo; Lee, Deok-Won; Huh, Wanwook

doi:10.2355/isijinternational.44.492

Cited by 86 publications

(87 citation statements)

References 6 publications

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“…This tendency is well known and reported in many other reports. 12,13,[23][24][25][26] Some computer simulation results are in good agreement with the data of Fig. 7.…”

Section: Time Variation Of Temperature Distribution In the Sinter Bedsupporting

confidence: 83%

“…7. [23][24][25] However, there are no reports that experimentally determine FFS values at each depth of the sinter bed at such a high spatial resolution.…”

Section: Time Variation Of Temperature Distribution In the Sinter Bedmentioning

confidence: 99%

“…5(a). [23][24][25] However, to date, no reports have experimentally determined the time variation of the temperature at such a high time and spatial resolution, i.e., 10 s and 2 mm, respectively. It is worth noting that each sinter pot test gives distinctly different counterparts of Fig.…”

Section: Time Variation Of Temperature Distribution In the Sinter Bedmentioning

confidence: 99%

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<i>In Situ</i> Temperature Measurement of Sinter Beds at High Spatial and Time Resolution

Taira

Matsumura

2018

ISIJ Int.

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In the sintering process during iron making, the sintering reaction proceeds in a packed bed along with the combustion of coke particles. Although detailed temperature information is necessary to improve the process, it is difficult to measure the temperature distribution inside the packed bed with high spatial and time resolution. We performed in situ temperature measurement inside the sinter bed at high spatial and time resolution, i.e., 2 mm and 10 s, respectively, during sintering. A sheathed thermocouple was scanned at optimized scan speed along the inside of the thin-wall alumina tube which was held perpendicular inside the sinter bed. The information on the temperature variation during sintering showed a clear correlation between the quality of the sinter and the sinter heat pattern for each layer. Further analysis also showed that the flame front speed is proportional to the O 2 consumption in the sinter bed. The temperature measurement technique enabled an unprecedented detailed discussion with the temperature distribution inside the sinter bed during sintering. This technique will not only help to improve the sintering process but also provide beneficial information on the chemical reactions occurring inside packed beds.

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“…This tendency is well known and reported in many other reports. 12,13,[23][24][25][26] Some computer simulation results are in good agreement with the data of Fig. 7.…”

Section: Time Variation Of Temperature Distribution In the Sinter Bedsupporting

confidence: 83%

“…7. [23][24][25] However, there are no reports that experimentally determine FFS values at each depth of the sinter bed at such a high spatial resolution.…”

Section: Time Variation Of Temperature Distribution In the Sinter Bedmentioning

confidence: 99%

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<i>In Situ</i> Temperature Measurement of Sinter Beds at High Spatial and Time Resolution

Taira

Matsumura

2018

ISIJ Int.

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“…9) In the mathematical model, the sintering bed is assumed as a homogeneous continuum of solid and gas phases. Solid material is treated as multiple solid phases, which makes it possible to consider different fuel characteristics.…”

Section: Model Descriptionmentioning

confidence: 99%

Influence of Oxygen Supply in an Iron Ore Sintering Process

et al. 2011

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The current issues of sintering technology in the iron and steel making industry are how to increase productivity of sintering process and to maintain proper quality of sintered ore. In the conventional sintering bed, combustion of solid fuel supplies heat required for sintering while it generates imbalance of heat concentration in the bed. The unevenly distributed heat is considered to be problematic on the quality aspect of sintered ore. Therefore, in order to maximize the production rate and quality of the products, an investigation for improved operational mode is indispensable. In this study, the effect of additional oxygen supply with an adjustment of injection location is discussed. Scale downed pot tests in addition to computation by previously developed unsteady 1-dimensional sintering bed model are employed for the examination. Also, quantitative parameters are applied to evaluate the changes of sintering process and the combustion characteristics are systemically analyzed among designed cases. The reactivity of coke combustion tends to increase with the enrichment of oxygen in the induced air. However, the degree of change in the sintering time as well as effective heat supply varies according to the locations of oxygen injection.

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“…Los datos calculados por el modelo, de los perfiles de las curvas correspondientes a la propagación del frente de llama, de la composición de los gases de combustión (CO, CO 2 y O 2 ) y del contenido de coque en la mezcla mineral, se comparan con los datos experimentales de la paila y se observa una buena correlación [15] .…”

Section: Introduccionunclassified

Control del avance del frente de llama en el lecho de sinterización de minerales de hierro

Cores¹,

Mochón²,

Ruiz-Bustinza³

et al. 2010

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ResumenEn una planta piloto de sinterización se cargan, en la paila cúbica de 40 cm de lado, 110 kg de una mezcla de minerales de hierro, caliza y coque, donde se han introducido una serie de termopares a diferentes profundidades. Se realizan ensayos para estudiar la evolución del ancho de la zona de combustión y de la temperatura máxima del frente de llama a través del lecho de sinterización. Para el análisis de los resultados se utiliza un sistema de adquisición de datos formado por dos módulos conectados en serie, encargados de realizar la conversión analógico-digital. La entrada analógica es la salida de los termopares y la salida digital es la medida de la temperatura. Se dispone de un ordenador para la conservación y almacenamiento de los datos y para realizar interpolaciones que simulan el estado y evolución del frente de llama a través del lecho. Palabras claveSinterización; Frente de llama; Combustión; Minerales de hierro; Sensores de temperatura; Ajuste de algoritmos; Sistema de adquisición de datos. Control of the flame front advance in a sintering bed of iron ores AbstractA sintering pan of 40 cm cubed is loaded with a mixture of iron ores, limestone and coke weighing 110 kg in a sintering pilot plant. In this sintering pan, a series of thermocouples have been introduced at different depths. Tests have been carried out to study the width of the combustion zone and the maximum temperature of the flame front across the sintering bed. For the analysis of the results, a data acquisition system was used. This consisted of two modules connected in serie, for performing the analogue-digital conversion. The analogue entry point is the exit point of the thermocouples and the digital exit point was the temperature average. A computer was used for conserving and storing the data and for carrying out interpolations, simulating the state and evolution of the flame front across the bed.

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Modeling of Combustion and Heat Transfer in an Iron Ore Sintering Bed with Considerations of Multiple Solid Phases

Cited by 86 publications

References 6 publications

<i>In Situ</i> Temperature Measurement of Sinter Beds at High Spatial and Time Resolution

<i>In Situ</i> Temperature Measurement of Sinter Beds at High Spatial and Time Resolution

Influence of Oxygen Supply in an Iron Ore Sintering Process

Control del avance del frente de llama en el lecho de sinterización de minerales de hierro

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