scholarly journals Optimization of iron ore blending in the COREX shaft furnace

2019 ◽  
Vol 119 (5) ◽  
Author(s):  
X. Liu ◽  
C. Liu ◽  
B. Wang ◽  
F. Ye
Keyword(s):  
Iron Ore ◽  
Shaft Furnace ◽  
Corex Shaft Furnace

scholarly journals Influence of center gas supply device on gas–solid flow in COREX shaft furnace through DEM–CFD model

2020 ◽  
Vol 18 (5-6) ◽  
Author(s):  
Heng Zhou ◽  
Shuyu Wang ◽  
Binbin Du ◽  
Mingyin Kou ◽  
Zhiyong Tang ◽  
...  
Keyword(s):  
Gas Flow ◽  
Shaft Furnace ◽  
Middle Zone ◽  
Cfd Model ◽  
Gas Velocity ◽  
Gas Distribution ◽  
Particle Segregation ◽  
Solid Flow ◽  
Corex Shaft Furnace ◽  
Gas Supply

AbstractIn order to develop the central gas flow in COREX shaft furnace, a new installment of center gas supply device (CGD) is designed. In this work, a coupled DEM–CFD model was employed to study the influence of CGD on gas–solid flow in COREX shaft furnace. The particle descending velocity, particle segregation behaviour, void distribution and gas distribution were investigated. The results show that the CGD affects the particles descending velocity remarkably as the burden falling down to the slot. Particle segregation can be observed under the inverse ‘V’ burden profile, and the influence of CGD on the particle segregation is unobvious on the whole, which causes the result that the voidage is slightly changed. Although the effect of CGD on solid flow is not significant, the gas flow in shaft furnace has an obvious change. Compared with the condition without CGD, in the case with CGD, the gas velocity is improved significantly, especially in the middle zone of the furnace, which further promotes the center gas distribution. Meanwhile, the pressure drop in the furnace with the installation of CGD is increased partly.

scholarly journals DEM Study of Solid Flow in COREX Shaft Furnace with Areal Gas Distribution Beams

2016 ◽  
Vol 56 (2) ◽  
pp. 245-254 ◽  
Author(s):  
Heng Zhou ◽  
Zhi-Guo Luo ◽  
Tao Zhang ◽  
Yang You ◽  
Zong-Shu Zou ◽  
...  
Keyword(s):  
Shaft Furnace ◽  
Gas Distribution ◽  
Solid Flow ◽  
Corex Shaft Furnace

Analyses of solid flow in latest design COREX shaft furnace by physical simulation

2014 ◽  
Vol 42 (3) ◽  
pp. 209-216 ◽  
Author(s):  
H. Zhou ◽  
Z. S. Zou ◽  
Z. G. Luo ◽  
T. Zhang ◽  
Y. You ◽  
...  
Keyword(s):  
Physical Simulation ◽  
Shaft Furnace ◽  
Solid Flow ◽  
Corex Shaft Furnace

scholarly journals Hydrogen Ironmaking: How It Works

Metals ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 922 ◽  
Author(s):  
Fabrice Patisson ◽  
Olivier Mirgaux
Keyword(s):  
Iron Ore ◽  
Shaft Furnace ◽  
Direct Reduction ◽  
Water Electrolysis ◽  
Current Standard ◽  
Ore Pellets ◽  
Production Of Hydrogen ◽  
Produce Steel ◽  
And Performance ◽  
Direct Reduction Of Iron

A new route for making steel from iron ore based on the use of hydrogen to reduce iron oxides is presented, detailed and analyzed. The main advantage of this steelmaking route is the dramatic reduction (90% off) in CO2 emissions compared to those of the current standard blast-furnace route. The first process of the route is the production of hydrogen by water electrolysis using CO2-lean electricity. The challenge is to achieve massive production of H2 in acceptable economic conditions. The second process is the direct reduction of iron ore in a shaft furnace operated with hydrogen only. The third process is the melting of the carbon-free direct reduced iron in an electric arc furnace to produce steel. From mathematical modeling of the direct reduction furnace, we show that complete metallization can be achieved in a reactor smaller than the current shaft furnaces that use syngas made from natural gas. The reduction processes at the scale of the ore pellets are described and modeled using a specific structural kinetic pellet model. Finally, the differences between the reduction by hydrogen and by carbon monoxide are discussed, from the grain scale to the reactor scale. Regarding the kinetics, reduction with hydrogen is definitely faster. Several research and development and innovation projects have very recently been launched that should confirm the viability and performance of this breakthrough and environmentally friendly ironmaking process.

scholarly journals Reduction Behavior of Carbon Composite Iron Ore Hot Briquette in Shaft Furnace and Scope on Blast Furnace Performance Reinforcement

2003 ◽  
Vol 43 (12) ◽  
pp. 1904-1912 ◽  
Author(s):  
Yoshiyuki Matsui ◽  
Muneyoshi Sawayama ◽  
Akito Kasai ◽  
Yoshiaki Yamagata ◽  
Fumio Noma
Keyword(s):  
Blast Furnace ◽  
Iron Ore ◽  
Shaft Furnace ◽  
Carbon Composite ◽  
Reduction Behavior ◽  
Furnace Performance ◽  
Blast Furnace Performance

Modelling Possibilities of the Medieval Bloomery Process under Laboratory Conditions

2012 ◽  
Vol 729 ◽  
pp. 290-295 ◽  
Author(s):  
Adam Thiele ◽  
László Dévényi
Keyword(s):  
Iron Ore ◽  
Shaft Furnace ◽  
Laboratory Conditions ◽  
Air Supply ◽  
Edx Analyses

Two different models have been developed under laboratory conditions based on the experiences of smelting experiments carried out in bloomery furnaces patterned on some excavated 10-12th century ones. Using Rudabánya iron ore, experiments were conducted in a closed pot and in a small open shaft furnace. During the experiments the air supply, the temperature and the weight of the iron ore and the charcoal were measured. SEM-EDX analyses were performed on bloom pieces obtained from the experiments. The results of the modelling may be correlated with the results of the previous smelting experiments. The model is sufficient for investigating some adequate parameters of the medieval bloomery technology, e.g. the iron yield.

scholarly journals Iron ore pellet disintegration mechanism in simulated shaft furnace conditions

2017 ◽  
Vol 317 ◽  
pp. 89-94 ◽  
Author(s):  
Lingyun Yi ◽  
Zhucheng Huang ◽  
Tao Jiang ◽  
Ronghai Zhong ◽  
Zhikai Liang
Keyword(s):  
Iron Ore ◽  
Shaft Furnace ◽  
Iron Ore Pellet
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