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

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.

scholarly journals A model for burden distribution and gas flow distribution of bell-less top blast furnace with parallel hoppers

2016 ◽  
Vol 40 (23-24) ◽  
pp. 10254-10273 ◽  
Author(s):  
Lin Shi ◽  
Guangsheng Zhao ◽  
Mingxin Li ◽  
Xiang Ma
Keyword(s):  
Blast Furnace ◽  
Gas Flow ◽  
Flow Distribution ◽  
Burden Distribution

scholarly journals A Mathematical Model Combined with Radar Data for Bell-Less Charging of a Blast Furnace

Processes ◽  
2020 ◽  
Vol 8 (2) ◽  
pp. 239 ◽  
Author(s):  
Meng Li ◽  
Han Wei ◽  
Yao Ge ◽  
Guocai Xiao ◽  
Yaowei Yu
Keyword(s):  
Mathematical Model ◽  
Blast Furnace ◽  
Gas Flow ◽  
Radar Data ◽  
Radar System ◽  
Utilization Efficiency ◽  
Burden Distribution ◽  
Gas Utilization ◽  
Reduce Energy Consumption ◽  
The Mathematical Model

Charging directly affects the burden distribution of a blast furnace, which determines the gas distribution in the shaft of the furnace. Adjusting the charging can improve the distribution of the gas flow, increase the gas utilization efficiency of the furnace, reduce energy consumption, and prolong the life of the blast furnace. In this paper, a mathematical model of blast furnace charging was developed and applied on a steel plant in China, which includes the display of the burden profile, burden layers, descent speed of the layers, and ore/coke ratio. Furthermore, the mathematical model is developed to combine the radar data of the burden profile. The above model is currently used in Nanjing Steel as a reference for operators to adjust the charging. The model is being tested with a radar system on the blast furnace.

Automated Monitoring of Physical Processes of Formation of Burden Material Surface and Gas Flow in Blast Furnace

2018 ◽  
Vol 277 ◽  
pp. 54-65 ◽  
Author(s):  
Anatoliy Golovchenko ◽  
Yuliya Pazynich ◽  
Michał Potempa
Keyword(s):  
Blast Furnace ◽  
Surface Texture ◽  
Gas Flow ◽  
Current Control ◽  
Material Surface ◽  
Burden Distribution ◽  
Flow Stabilization ◽  
Operating Blast Furnace ◽  
First Time ◽  
Operating Blast

The paper is devoted to the issues of energy saving automatic control of radial burden distribution in the blast furnace throat. The main idea consists in control with prediction of the control resulting on the basis of automatic monitoring of burden surface texture. The paper develops the mathematic description of burden surface texture on the blast furnace throat by means of substantiation of minimum quantity of general indicators of the mixture being closely related to the main parameters of blast furnace processes. It is the first time that the optimum value of hoper depth in burden surface at 0.14 – 0.2 of throat diameter determined, the methods of its stabilization at the rate are substantiated, the new regularity of burden surface formation on the operating blast furnace throat is shown as consisting in the fact that the hoper depth on the surface is mainly changed responding the process of material charge rather than bulk material descent after the charge. It was also substantiated for the first time that radioisotopic methods for current control of burden distribution on the blast furnace throat provide timely formation of control actions for gas flow stabilization. The principle of self-tuning was theoretically substantiated for monitoring system of gamma profilometer responding to the monitoring conditions with respect to high penetration and random character of gamma rays. The principle enables significant improvement of accuracy, quick-response and radiological safety of gamma profilometer operation. The possibility of determination of burden surface texture on the throat of operating blast furnace and distribution of burden components according to infrared radiation of the surface without application of radiation hazardous monitoring means was proved for the first time.

Mathematical modeling of the burden distribution in the blast furnace shaft

2011 ◽  
Vol 17 (3) ◽  
pp. 485-496 ◽  
Author(s):  
Jong-In Park ◽  
Hun-Je Jung ◽  
Min-Kyu Jo ◽  
Han-Sang Oh ◽  
Jeong-Whan Han
Keyword(s):  
Mathematical Modeling ◽  
Blast Furnace ◽  
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.

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.

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

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 Influence of Gas Flow on Burden Distribution in Blast Furnace

1980 ◽  
Vol 66 (13) ◽  
pp. 1878-1887 ◽  
Author(s):  
Hiroaki NISHIO ◽  
Tatsuro ARIYAMA
Keyword(s):  
Blast Furnace ◽  
Gas Flow ◽  
Burden Distribution
Sign in / Sign up

Export Citation Format

Share Document