A simulation of heat transfer during billet transport

Jaklič, Anton; Glogovac, B.; Kolenko, Tomaž; Zupančič, Borut; Težak, Bojan

doi:10.1016/s1359-4311(02)00022-4

Cited by 27 publications

(21 citation statements)

References 1 publication

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“…23 (ii) calculations of the scale conductivity were conducted over a range of void sizes using the thermal conductivity of iron oxides 35 and the formula for heat transfer by radiation over voids, 36 and 2 W m 21 K 21 is adopted (iii) conductance at the interface is uncertain. Jaklič et al 36 assumed that scale detaches from steel, and modelled heat transfer between them as radiation between two infinite parallel planes. The conductance estimated in this way is in hundreds of W m 22 K 21 .…”

Section: Modelling Of Slabsmentioning

confidence: 99%

“…The details of the finite difference scheme are as follows: (i) boundary condition at the slab/rider interface depends on whether the beam is walking or stationary, since it determines the time of slab on rider. If the slab is not resting on the rider, the heat is transferred from slab to rider by radiation (equation (35)), otherwise by conductivity (ii) the rider is deeply imbedded into a beam, and heat transfer from gas to its sides is neglected (iii) if the slab is resting on the rider, the effective slab temperature for heat transfer to the rider is a simple contact length based average of slab temperatures at individual nodes (iv) since the rider is composite, the effective physical properties of nodes surrounded by different materials are calculated as in the case of refractory (v) the boundary condition at the slab/rider interface in a particular zone is given by equation (36). The condition depends on the portion of time with slab resting on the rider (vi) the boundary condition at the water/pipe interface is given by equation (37) h r,rad~s e B T 2 Stationary and walking beams obstruct a large portion of radiation from gas to the bottom face of a slab.…”

Section: Heat Transfer To and Through Beamsmentioning

confidence: 99%

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Fast dynamic heat and mass balance model of walking beam reheat furnace with two-dimensional slab temperature profile

Panjković¹,

Gloss²

2012

Ironmaking & Steelmaking

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A fast dynamic heat and mass balance model of a walking beam reheat furnace was developed and validated with the data from a 275 t h 21 industrial furnace. The model divides the furnace into well stirred zones, and from air and gas flowrates into individual zones, preheated air temperature and slab locations, calculates in each zone the temperature of gas and temperature profile of refractory, two-dimensional temperature profile of slabs and scale thickness on horizontal surfaces of slabs. The model can be used for offline analyses and is fast enough for online use, where it can handle the steady operation and the special cases like delay, empty furnace and the gradual filling or emptying of the furnace. The details of the model and the validation results are presented here, together with the sensitivity analysis of the key parameters, and the study of options for fuel savings and the reduction in skidmark severity.

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Section: Modelling Of Slabsmentioning

confidence: 99%

Section: Heat Transfer To and Through Beamsmentioning

confidence: 99%

Fast dynamic heat and mass balance model of walking beam reheat furnace with two-dimensional slab temperature profile

Panjković¹,

Gloss²

2012

Ironmaking & Steelmaking

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“…Temperature is the sensitive factor of mechanical parameters such as rolling force, torque and power, and affects the thickness precision of the product and the surface quality. The temperature is also an important condition for the recrystallization, transformation and precipitation of the hot rolling [1][2][3][4]. The control precision of the rolling temperature determines the structure and properties of the product after rolling.…”

Section: Introductionmentioning

confidence: 99%

Research of on-line prediction method of plate temperature during hot rolling

He¹,

Jiao²,

Zhao³

et al. 2017

Proceedings of the 2016 International Forum on Mechanical, Control and Automation (IFMCA 2016)

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Abstract. Aiming at the demand of on-line calculation of temperature in the process of hot rolling production, the method of on-line forecasting of plate temperature based on PLC is studied. The rolling micro-tracing queue is established, and one-dimensional differential temperature iterative calculation formula is developed to realize the whole process of plate production. The temperature distribution in the plate thickness direction can be obtained in real time, and the forecasting results can meet the engineering requirements.

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“…Algunos trabajos publicados abordan la formación de óxidos dentro de los hornos empujadores de recalentamiento de palanquillas, en el año 2001, Anton Jajlic y sus colaboradores [4] proponen un modelo donde se simula el calentamiento de las palanquillas dentro de un horno de vigas galopantes, el modelo se construyó en tres dimensiones, y evalúa los fenómenos de transporte energético considerando los tres mecanismos de transferencia de calor, la conducción, la convección y la radiación. Los modelos existentes simulan el proceso de calentamiento de las palanquillas durante su desplazamiento.…”

Section: Introductionunclassified

Simulación numérica de un horno tipo empujador para palanquillas con formación de óxido

Villa¹,

Solorio-Díaz²,

Hernández³

2015

ings

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El siguiente trabajo muestra un modelo numérico de un horno de recalentamiento tipo empujador, utilizando un programa comercial de dinámica de fluidos (CFD). El modelo acopla las ecuaciones de transferencia de calor, dinámica de fluidos y reacción química en estado no estacionario. Para la simulación de la combustión se utilizó el modelo de transportes de especies Eddy-dissipation; para la dinámica de fluidos de los gases se hizo uso del modelo k - e realizable. Se simuló la transferencia de calor considerando los mecanismos de conducción, convección y radiación. El modelo P-1 fue utilizado para simular la radiación que aportan los gases de combustión al calentamiento de la palanquilla. Las historias térmicas simuladas al interior de las palanquillas fueron comparadas con mediciones en planta. El modelo también acopla los modelos de oxidación superficial de la carga (barras de sección cuadrada de acero de 160 mm x 160 mm x 12.7 m). Se caracterizó el historial térmico en estado no estacionario de una palanquilla cuadrada de 16 mm y 12.7 m, durante su desplazamiento en el interior del horno, estas mediciones de temperatura permitieron caracterizar las pérdidas de material por formación de óxidos, en cada tiempo y posición al interior del horno de calentamiento.

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A simulation of heat transfer during billet transport

Cited by 27 publications

References 1 publication

Fast dynamic heat and mass balance model of walking beam reheat furnace with two-dimensional slab temperature profile

Fast dynamic heat and mass balance model of walking beam reheat furnace with two-dimensional slab temperature profile

Research of on-line prediction method of plate temperature during hot rolling

Simulación numérica de un horno tipo empujador para palanquillas con formación de óxido

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