Investigation of Combustion and Heat Transfer in an Industrial Reheating Furnace Using CFD

In this work, the development of a mathematical heat transfer model for a walking-beam type reheating furnace is described and preliminary model predictions are presented. The model can predict the heat flux distribution within the furnace and the temperature distribution in the slab throughout the reheating furnace process by considering the heat exchange between the slab and its surroundings, including the radiant heat transfer among the slabs, the skids, the hot combustion gases and the furnace wall as well as the gas convection heat transfer in the furnace. In addition, present model is designed to be able to predict the formation and growth of the scale layer on the slab in order to investigate its effect on the slab heating. A comparison is made between the predictions of the present model and the data from an in situ measurement in the furnace, and a reasonable agreement is found. The results of the present simulation show that the effect of the scale layer on the slab heating is considerable.

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Heat transfer and energy analysis of a pusher type reheating furnace using oxygen enhanced air for combustion

Journal of Iron and Steel Research International ◽

10.1016/s1006-706x(10)60079-9 ◽

2010 ◽

Vol 17 (4) ◽

pp. 12-17 ◽

Cited By ~ 8

Author(s):

Hamzeh Jafar Karimi ◽

Mohammad Hassan Saidi

Keyword(s):

Heat Transfer ◽

Energy Analysis ◽

Reheating Furnace

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Modeling of Steel Slab Reheating Process in a Walking Beam Reheating Furnace

Volume 2: Heat Transfer in Multiphase Systems; Gas Turbine Heat Transfer; Manufacturing and Materials Processing; Heat Transfer in Electronic Equipment; Heat and Mass Transfer in Biotechnology; Heat Transfer Under Extreme Conditions; Computational Heat Transfer; Heat Transfer Visualization Gallery; General Papers on Heat Transfer; Multiphase Flow and Heat Transfer; Transport Phenomena in Manufacturing and Materials Processing ◽

10.1115/ht2016-7282 ◽

2016 ◽

Cited By ~ 1

Author(s):

Guangwu Tang ◽

Arturo Saavedra ◽

Tyamo Okosun ◽

Bin Wu ◽

Chenn Q. Zhou ◽

...

Keyword(s):

Heat Transfer ◽

Three Dimensional ◽

Heat Transfer Model ◽

Furnace Operation ◽

Production Data ◽

Heating Process ◽

Transfer Model ◽

Transfer Coefficients ◽

Reheating Furnace ◽

Reheating Process

Slab reheating is a very important step in steel product manufacturing. A small improvement in reheating efficiency can translate into big savings to steel mills in terms of fuel consumption and productivity. Computational fluid dynamics (CFD) has been employed in conducting numerical simulations of the slab reheating furnace operation. However, a full industrial scale three-dimensional (3D) simulation of a slab reheating furnace, while comprehensive, is not an efficient way to conduct broad studies of the slab heating process. In this paper, a comprehensive two-dimensional (2D) numerical heat transfer model for slab reheating in a walking beam furnace was developed using the finite difference method. The 2D heat transfer model utilizes the heat transfer coefficients derived from a 3D reheating furnace CFD model which was validated by using mill instrumented slab trials. The 2D heat transfer model is capable of predicting slab temperature evolutions during the reheating processes based on the real time furnace conditions and steel physical properties. The 2D model was validated by using mill instrumented slab trials and production data. Good agreement between the model predictions and production data was obtained.

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