Heat Transfer Modelling of a Blast Furnace Hearth

Swartling, Maria; Sundelin, Bo; Tilliander, Anders; Jönsson, Pär G.

doi:10.1002/srin.200900145

Cited by 14 publications

(11 citation statements)

References 10 publications

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“…Generally, these models consider a single‐phase flow, treat the coke bed as porous media, neglect movements of coke and liquid interface, and regard the flow and heat transfer as under a steady state. Also, Finite Volume Method (FVM), which is widely used in CFD computation, was mainly used to solve the mass, momentum, and energy conservation equations, although some studies used FEM to predict the heat transfer through refractory walls for given profiles . Furthermore, in some CFD models, some specific treatments, as detailed below, have been introduced for coke bed and nature convection.…”

Section: Modeling and Simulation Of Different Bf Regionsmentioning

confidence: 99%

“…www.steel-research.de mainly used to solve the mass, momentum, and energy conservation equations, although some studies used FEM to predict the heat transfer through refractory walls for given profiles. [91,92] Furthermore, in some CFD models, some specific treatments, as detailed below, have been introduced for coke bed and nature convection.…”

Section: Flow and Heat Transfermentioning

confidence: 99%

“…The modeling of lining/refractory erosion of hearth can be categorized into three groups. The first group indirectly estimates the erosion profile according to magnitude of wall stress or isotherm using a continuum model, as discussed in Section 3.1.1.1. Here, the value of isotherm, at which the wall is eroded, is set to 1150 °C for carbon brick and 1350 °C for chamotte brick, determined by the investigation of dissected BFs .…”

Section: Modeling and Simulation Of Different Bf Regionsmentioning

confidence: 99%

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Review on Modeling and Simulation of Blast Furnace

Kuang

2017

steel research int.

172

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The design and control of blast furnace (BF) ironmaking must be optimized in order to be competitive and sustainable, particularly under the more and more demanding and tough economic and environmental conditions. To achieve this, it is necessary to understand the complex multiphase flow, heat and mass transfer, and global performance of a BF under different conditions. Mathematical modeling, often coupled with physical modeling, plays an important role in this area. This paper reviews the recent developments in this direction. The emphasis is given to mathematical models for different BF regions from the top charging system, body, and finally down to raceway and hearth. The needs for the further research and developments are also discussed.

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Section: Modeling and Simulation Of Different Bf Regionsmentioning

confidence: 99%

Section: Flow and Heat Transfermentioning

confidence: 99%

Section: Modeling and Simulation Of Different Bf Regionsmentioning

confidence: 99%

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Review on Modeling and Simulation of Blast Furnace

Kuang

2017

steel research int.

172

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“…Suitable slag corrosion and iron erosion resistance of tap-hole clay are important to the safety and high efficiency of the blast furnace operation. 1) With the development of the iron making process, the tapping pressure, smelting strength and wind flux increase. Oxygenenriched blowing is also widely used in blast furnace operations.…”

Section: Introductionmentioning

confidence: 99%

Effects of pitch addition on the properties of environmental-friendly tap-hole clay

Wang

Yin

Qiu

et al. 2017

J. Ceram. Soc. Japan

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An environmentally friendly tap-hole clay that contains almost no benzo [a]pyrene was developed using resin and pitch as binder. The effects of the pitch addition on the tap-hole clay were investigated through evaluating the physical and chemical properties together with the microstructure, phase compositions and thermal analysis. The plasticity of the tap-hole clay is significantly improved with increasing pitch addition. However, the bulk density of tap-hole clay decreases gradually with increasing pitch content after treatment at different temperatures, while the apparent porosity increases due to the evaporation of pitch components and relatively low solid components. Also, this phenomenon is the main reason for the poor volume stability of taphole clay after heat treatment at different temperatures, although mullite formation has negated some of the shrinkage. Mechanical-strength evolution of the tap-hole clay is closely related to the carbonization process of the resin and pitch at high temperatures. Oxidation resistance could be significantly improved with 2 wt % of the pitch, but there is almost no change with much more than 2 wt %. However, the higher pitch content corresponds to better slag resistance. In terms of the comprehensive performance of the tap-hole clay, 4 wt % of the pitch would be better.

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“…2 at SSAB Oxelösund in Sweden, and was evaluated using thermocouple data from the present campaign of the operating furnace. It was developed along with other model‐based approached18, 19 based on Fluent20 with the objective of studying the short‐term lining temperature changes during tapping.…”

Section: Introductionmentioning

confidence: 99%

Interpretation of Tap Induced Cyclic Temperatures in the Blast Furnace Lining

Swartling

Tilliander

Saxén

et al. 2012

steel research int.

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The thermal behavior of the blast furnace hearth was studied using modeling. The focus was the effect of the size and shape of the taphole clay layer around the taphole. Four different cases have been calculated: one reference case and three cases with different taphole clay layer geometries. It was found that the calculated peak‐to‐peak amplitudes of the lining temperatures during the tap cycles at the location of a thermocouple can be approximated as a linear function of the taphole clay layer thicknesses for all calculated cases. Modeling was also done where both the 90th and the 10th percentile of the observed peak‐to‐peak values of the studied tap cycles were included to describe the behavior of the operating furnace. The taphole region can be divided into three categories based on how well the model can describe the measured process data: below, at, and above taphole level. Below the taphole level, the measured lining temperature variations are smaller than for the calculated results. At the taphole level, the model can describe the behavior well. Above the taphole level the measured lining temperature variations are larger than for the calculated results. It was concluded that in order to make a more accurate heat transfer model of the taphole region, the presence of a skull build‐up below the taphole, erosion above the taphole, and the bath level variations need to be taken into account.

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Heat Transfer Modelling of a Blast Furnace Hearth

Cited by 14 publications

References 10 publications

Review on Modeling and Simulation of Blast Furnace

Review on Modeling and Simulation of Blast Furnace

Effects of pitch addition on the properties of environmental-friendly tap-hole clay

Interpretation of Tap Induced Cyclic Temperatures in the Blast Furnace Lining

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