Numerical Methods for Simulating the Reduction of Iron Ore in Blast Furnace Shaft

2013 ◽  
Author(s):  
Dong Fu ◽  
Yan Chen ◽  
Chenn Q. Zhou
Keyword(s):  
Blast Furnace ◽  
Chemical Reactions ◽  
Gas Flow ◽  
Iron Ore ◽  
Solid Phase ◽  
Chemical Reactor ◽  
Layer By Layer ◽  
Moving Bed ◽  
Furnace Shaft ◽  
Counter Current

The blast furnace process is a counter-current moving bed chemical reactor to reduce iron oxides to iron, which involves complex transport phenomena and chemical reactions. The iron ore and coke are alternatively charged into the blast furnace, forming a layer by layer structural burden which is slowly descending in the counter-current direction of the ascending gas flow. A new methodology was proposed to efficiently simulate the gas and solid burden flow in the counter current moving bed in blast furnace shaft. The gas dynamics, burden movement, chemical reactions, heat and mass transfer between the gas phase and solid phase are included. The new methodology has been developed to explicitly consider the effects of the layer thickness thermally and chemically in the CFD model.

Numerical Methods for Simulating the Reduction of Iron Ore in Blast Furnace Shaft

2014 ◽  
Vol 6 (2) ◽  
Author(s):  
Dong Fu ◽  
Chenn Q. Zhou ◽  
Yan Chen
Keyword(s):  
Blast Furnace ◽  
Chemical Reactions ◽  
Gas Flow ◽  
Iron Ore ◽  
Solid Phase ◽  
Chemical Reactor ◽  
Layer By Layer ◽  
Moving Bed ◽  
Furnace Shaft ◽  
Counter Current

The blast furnace process is a counter-current moving bed chemical reactor to reduce iron oxides to iron, which involves complex transport phenomena and chemical reactions. The iron ore and coke are alternatively charged into the blast furnace, forming a layer by layer structural burden which is slowly descending in the counter-current direction of the ascending gas flow. A new methodology was proposed to efficiently simulate the gas and solid burden flow in the counter-current moving bed in blast furnace shaft. The gas dynamics, burden movement, chemical reactions, heat and mass transfer between the gas phase and solid phase are included. The new methodology has been developed to explicitly consider the effects of the layer thickness thermally and chemically in the CFD model.

scholarly journals Development of the Burden Distribution and Gas Flow Model in the Blast Furnace Shaft

2011 ◽  
Vol 51 (10) ◽  
pp. 1617-1623 ◽  
Author(s):  
Jong-In Park ◽  
Ui-Hyun Baek ◽  
Kyoung-Soo Jang ◽  
Han-Sang Oh ◽  
Jeong-Whan Han
Keyword(s):  
Blast Furnace ◽  
Gas Flow ◽  
Flow Model ◽  
Burden Distribution ◽  
Furnace Shaft

Numerical Analysis of Flow Behavior Inside the Blast Furnace

2009 ◽  
Author(s):  
Dong Fu ◽  
Fengguo Tian ◽  
Guoheng Chen ◽  
D. Frank Huang ◽  
Chenn Q. Zhou
Keyword(s):  
Blast Furnace ◽  
Gas Flow ◽  
Cfd Simulation ◽  
Flow Behavior ◽  
Three Dimensional ◽  
Furnace Productivity ◽  
Gas Distribution ◽  
Furnace Shaft ◽  
Parametric Studies ◽  
Flow Through

Gas and burden distributions inside a blast furnace play an important role in optimizing gas utilization versus the furnace productivity and minimizing the CO2 emission in steel industries. In this paper, a mathematical model is presented to describe the burden descent in the blast furnace shaft and gas distribution, with the alternative structure of coke and ore layers being considered. Multi-dimensional Ergun’s equation is solved with considering the turbulent compressible gas flow through the burden column. The porosity of each material will be treated as a function of three dimensional functions which will be determined by the kinetics sub-models accordingly. A detailed investigation of gas flow through the blast furnace will be conducted with the given initial burden profiles along with the effects of redistribution during burden descending. Also, parametric studies will be carried out to analyze the gas distribution cross the blast furnace under different cohesive zone (CZ) shapes, charging rate, and furnace top pressure. A good agreement was obtained between the CFD simulation and published experimental data. Based on the results, the inverse V shape is proved to be the most desirable CZ profile.

scholarly journals Dynamic and Isothermal Reduction Swelling Behaviour of Olivine and Acid Iron Ore Pellets under Simulated Blast Furnace Shaft Conditions

2012 ◽  
Vol 52 (7) ◽  
pp. 1257-1265 ◽  
Author(s):  
Mikko Iljana ◽  
Olli Mattila ◽  
Tuomas Alatarvas ◽  
Ville-Valtteri Visuri ◽  
Jari Kurikkala ◽  
...  
Keyword(s):  
Blast Furnace ◽  
Iron Ore ◽  
Swelling Behaviour ◽  
Iron Ore Pellets ◽  
Furnace Shaft ◽  
Ore Pellets ◽  
Isothermal Reduction ◽  
Reduction Swelling

Using a Mathematical Model of Counter-Current Flow in a Blast Furnace to Evaluate Reducibility of Iron-Ore-Bearing Raw Materials

2015 ◽  
Vol 86 (4) ◽  
pp. 320-328 ◽  
Author(s):  
Pavlina Pustejovska ◽  
Jiri Tuma ◽  
Vladimir Stanek ◽  
Jiri Kristal ◽  
Simona Jursova ◽  
...  
Keyword(s):  
Mathematical Model ◽  
Blast Furnace ◽  
Iron Ore ◽  
Current Flow ◽  
Raw Materials ◽  
Counter Current Flow ◽  
Counter Current

scholarly journals Mathematical Model of Gas Flow Distribution in a Scale Model of a Blast Furnace Shaft

2004 ◽  
Vol 44 (3) ◽  
pp. 518-526 ◽  
Author(s):  
Juan Jiménez ◽  
Javier Mochón ◽  
Jesús Sainz de Ayala
Keyword(s):  
Mathematical Model ◽  
Blast Furnace ◽  
Gas Flow ◽  
Flow Distribution ◽  
Scale Model ◽  
Furnace Shaft

scholarly journals Effect of Circulating Elements on the Dynamic Reduction Swelling Behaviour of Olivine and Acid Iron Ore Pellets under Simulated Blast Furnace Shaft Conditions

2013 ◽  
Vol 53 (3) ◽  
pp. 419-426 ◽  
Author(s):  
Mikko Iljana ◽  
Olli Mattila ◽  
Tuomas Alatarvas ◽  
Jari Kurikkala ◽  
Timo Paananen ◽  
...  
Keyword(s):  
Blast Furnace ◽  
Iron Ore ◽  
Swelling Behaviour ◽  
Iron Ore Pellets ◽  
Furnace Shaft ◽  
Ore Pellets ◽  
Reduction Swelling

scholarly journals Model-Based Analysis of Factors Affecting the Burden Layer Structure in the Blast Furnace Shaft

Metals ◽  
2019 ◽  
Vol 9 (9) ◽  
pp. 1003 ◽  
Author(s):  
Li ◽  
Saxén ◽  
Liu ◽  
Zou ◽  
Shao
Keyword(s):  
Blast Furnace ◽  
Gas Flow ◽  
Layer Structure ◽  
Surface Profile ◽  
Flow Distribution ◽  
Sensitivity Study ◽  
Distribution Model ◽  
Burden Distribution ◽  
Factors Affecting ◽  
Furnace Shaft

The distribution of burden layers in an ironmaking blast furnace strongly influences the conditions in the upper part of the process. The bed permeability largely depends on the distribution of ore and coke in the lumpy zone, which affects the radial gas flow distribution in the shaft. Along with the continuous advancement of technology, more information about the internal conditions of the blast furnace can be obtained through advanced measurement equipment, including 2D profiles and 3D surface maps of the top burden surface. However, the change of layer structure along with the burden descent cannot be directly measured. A mathematical model predicting the burden distribution and the internal layer structure during the descending process is established in this paper. The accuracy of the burden distribution model is verified by a comparison with experimental results. A sensitivity study was undertaken to clarify the role of some factors on the arising layer distribution, including the descent-rate distribution, the initial burden surface profile, and the charging direction through the charging matrix. The findings can be used as a theoretical basis to guide plant operations for optimizing the charging.

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