Solid Flow in a Shaft Furnace in Smelting Reduction Process under Circumferential Imbalance Conditions

2017 ◽  
Vol 88 (12) ◽  
pp. 1700212 ◽  
Author(s):  
Heng Zhou ◽  
Shengli Wu ◽  
Mingyin Kou ◽  
Biao Tang ◽  
Hanchi Cheng ◽  
...  
Keyword(s):  
Shaft Furnace ◽  
Reduction Process ◽  
Smelting Reduction ◽  
Solid Flow

scholarly journals Influence of MgO on Low Temperature Reduction and Mineralogical Changes of Sinter in Simulated COREX Shaft Furnace Reducing Conditions

Minerals ◽  
2019 ◽  
Vol 9 (5) ◽  
pp. 272 ◽  
Author(s):  
Deqing Zhu ◽  
Jianlei Chou ◽  
Benjing Shi ◽  
Jian Pan
Keyword(s):  
Low Temperature ◽  
Shaft Furnace ◽  
Reduction Rate ◽  
Reduction Process ◽  
Smelting Reduction ◽  
Temperature Reduction ◽  
Corex Shaft Furnace ◽  
Reducing Conditions ◽  
Before And After ◽  
Low Temperature Reduction

COREX (Coal-Reduction-Extreme) smelting reduction process provides a sustainable developing way for ironmaking industry, but the sources of iron ore materials restrict its development in China. Meanwhile, the application of sinter, which is marked by low manufacture cost and overcapacity in China, to COREX furnace faced proportion limitation due to its worse low temperature reduction degradation performance. This work explored the influence of MgO content on the low-temperature (550 °C) reduction of sinter in reducing conditions simulating COREX shaft furnace. The mineralogical change of sinter containing different content of MgO before and after reduction was analyzed by X-ray diffraction (XRD), optical microscopy, and scanning electron microscopy for revealing the action mechanism of MgO on the low-temperature-reduction of sinter. The results show that increasing MgO (1.36–3.10%) improved the low temperature reduction degradation performance of sinter, and decreased its reduction degree and reduction rate at low temperature. More MgO the sinter contained, less Fe2O3 and SFCA was observed in sinter. Meantime, less Fe2O3 was reduced and the generation of innerstress was restrained during reduction process. The improved RDI (reduction degradation index) in COREX process of sinter by increasing MgO content is a comprehensive result of lowering strength and inhibiting probable reduction of sinter.

Discrete particle simulation of solid flow in a melter-gasifier in smelting reduction process

2017 ◽  
Vol 314 ◽  
pp. 641-648 ◽  
Author(s):  
Huiming Zhang ◽  
Zongyan Zhou ◽  
A.B. Yu ◽  
Sun-Young Kim ◽  
Suk-Kwang Jung
Keyword(s):  
Reduction Process ◽  
Particle Simulation ◽  
Smelting Reduction ◽  
Solid Flow ◽  
Discrete Particle ◽  
Discrete Particle Simulation

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.

Impact of slag composition activity on the behavior of phosphorus in the smelting reduction process of high-phosphorus iron ores

2017 ◽  
Vol 42 (38) ◽  
pp. 24487-24494 ◽  
Author(s):  
Yiqin Liu ◽  
Hao Zhang ◽  
Zengen Li ◽  
Aimin Zhang ◽  
Xiaohui Zhang ◽  
...  
Keyword(s):  
Slag Composition ◽  
Reduction Process ◽  
Iron Ores ◽  
Smelting Reduction ◽  
High Phosphorus ◽  
Phosphorus Iron

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 Recovery of Iron, Chromium, and Nickel from Pickling Sludge Using Smelting Reduction

Metals ◽  
2018 ◽  
Vol 8 (11) ◽  
pp. 936 ◽  
Author(s):  
Zhaohui Tang ◽  
Xueyong Ding ◽  
Xinlin Yan ◽  
Yue Dong ◽  
Chenghong Liu
Keyword(s):  
Reduction Process ◽  
Slag Basicity ◽  
Experimental Results ◽  
Iron Ores ◽  
Reduction Temperature ◽  
Smelting Reduction ◽  
Reduction Time ◽  
Temperature Reduction ◽  
Pickling Sludge ◽  
Iron Chromium

This paper reports the recoveries of iron, chromium, and nickel from pickling sludge using coal-based smelting reduction. The influences of slag basicity (CaO/SiO2, which is controlled by high phosphorus oolitic hematite iron ores), reduction temperature, reduction time, and the C/O mole ratio on the recoveries of Fe, Cr, and Ni are investigated systematically. The experimental results show that high recoveries of Fe (98.91%), Cr (98.46%), and Ni (99.44%) are produced from pickling sludge with optimized parameters for the smelting reduction process. The optimized parameters are a slag basicity of 1.5; a reduction temperature of 1550 °C, a reduction time of 90 min, and a C/O mole ratio of 2.0. These parameters can be used as technical support for the recycling of pickling sludge with pyrometallurgy.

Sign in / Sign up

Export Citation Format

Share Document