Theoretical Evaluation on Merits of the Processes of Gas-Based Shaft Furnace with Top Gas Recycling

2015 ◽  
Vol 87 (5) ◽  
pp. 653-661 ◽  
Author(s):  
Bingnan Liu ◽  
Qiang Li ◽  
Zongshu Zou ◽  
Aibing Yu
Keyword(s):  
Shaft Furnace ◽  
Theoretical Evaluation ◽  
Top Gas Recycling ◽  
Gas Recycling

scholarly journals Prediction of Pre-reduction Shaft Furnace with Top Gas Recycling Technology Aiming to Cut Down CO2 Emission

2011 ◽  
Vol 51 (8) ◽  
pp. 1344-1352 ◽  
Author(s):  
Shengli Wu ◽  
Jian Xu ◽  
Jun-ichiro Yagi ◽  
Xinying Guo ◽  
Lihua Zhang
Keyword(s):  
Co2 Emission ◽  
Shaft Furnace ◽  
Recycling Technology ◽  
Top Gas Recycling ◽  
Gas Recycling

scholarly journals A Numerical Study on the Performance of the H2 Shaft Furnace with Dual-Row Top Gas Recycling

Processes ◽  
2021 ◽  
Vol 9 (12) ◽  
pp. 2134
Author(s):  
Shan Yu ◽  
Lei Shao ◽  
Zongshu Zou ◽  
Henrik Saxén
Keyword(s):  
Microwave Heating ◽  
Thermal Energy ◽  
Microwave Power ◽  
Energy Demand ◽  
Shaft Furnace ◽  
Injection Rate ◽  
Injection Level ◽  
Furnace Performance ◽  
Top Gas Recycling ◽  
Gas Recycling

Given the urgent pursuit of carbon neutrality and stringent climate policies, the H2 shaft furnace (H2-SF) is starting to gain widespread attention in the steel industry. In this study, the performance of the H2-SF under operation with a dual-row injection top gas recycling system was investigated by a one-dimensional mathematical model. The potential of microwave heating as a means to supply thermal energy in regions of energy deficit was also assessed briefly. The results showed that for scenarios without microwave heating, increasing the upper-row injection rate can improve the furnace performance, and increasing the distance of the upper-row injection level from the furnace top also has a positive effect. A high microwave heating efficiency is expected in regions above the upper-row injection level. For scenarios with microwave heating, a higher microwave power leads to a better furnace performance. Thus, a higher furnace productivity can be achieved by increasing either the upper-row injection rate or the microwave power. However, the latter seems more promising as it decreases the total energy demand due to a better utilization of thermal energy. Based on the comparison of two representative examples, the decrease in the total energy demand is about 0.2 GJ/t-Fe.

scholarly journals A downscaling cold model for solid flow behaviour in a top gas recycling-oxygen blast furnace

2020 ◽  
Vol 39 (1) ◽  
pp. 447-456
Author(s):  
Zhenlong An ◽  
Jingbin Wang ◽  
Yanjun Liu ◽  
Yingli Liu ◽  
Xuefeng She ◽  
...  
Keyword(s):  
Blast Furnace ◽  
Gas Flow ◽  
Stagnant Zone ◽  
Flow Zone ◽  
Cold Model ◽  
Solid Flow ◽  
Oxygen Blast ◽  
Top Gas Recycling ◽  
Batch Weight ◽  
Gas Recycling

AbstractThe top gas recycling-oxygen blast furnace (TGR-OBF) is a reasonable method used to reduce both coke rate and energy consumption in the steel industry. An important feature of this process is shaft gas injection. This article presents an experimental study on the gas–solid flow characteristics in a TGR-OBF using a two-dimensional cold model. The experimental conditions and parameters were determined using a series of similarity criteria. The results showed that the whole flow area in the TGR-OBF can be divided into four distinct flow zones, namely, the stagnant zone, the plug flow zone in the upper part of the shaft, the converging flow zone and the quasi-stagnant flow zone, which is similar to that in a traditional blast furnace. Then the effects of batch weight and the ratio (X) of the shaft injected gas flow rate to the total gas flow rate on solid flow behaviour were investigated in detail. With the increase in batch weight, the shape of the stagnant zone tends to be shorter and thicker. Furthermore, with the increase in X value from 0 to 1, the stagnant zone gradually becomes thinner and higher. The results obtained from the experiments provide fundamental data and a validation for the discrete element method–computational fluid dynamics-coupled mathematical model for TGR-OBFs for future studies.

Kinetic analysis of iron oxide reduction in top gas recycling oxygen blast furnace

2012 ◽  
Vol 39 (5) ◽  
pp. 313-317 ◽  
Author(s):  
Y H Han ◽  
J S Wang ◽  
R Z Lan ◽  
L T Wang ◽  
X J Zuo ◽  
...  
Keyword(s):  
Blast Furnace ◽  
Iron Oxide ◽  
Kinetic Analysis ◽  
Oxide Reduction ◽  
Iron Oxide Reduction ◽  
Oxygen Blast Furnace ◽  
Oxygen Blast ◽  
Top Gas Recycling ◽  
Gas Recycling

Multiple Criteria in a Top Gas Recycling Blast Furnace Optimized through ak-Optimality-Based Genetic Algorithm

2015 ◽  
Vol 87 (10) ◽  
pp. 1284-1294 ◽  
Author(s):  
Kaibalya Mohanty ◽  
Tamoghna Mitra ◽  
Henrik Saxén ◽  
Nirupam Chakraborti
Keyword(s):  
Genetic Algorithm ◽  
Blast Furnace ◽  
Multiple Criteria ◽  
Top Gas Recycling ◽  
Gas Recycling

A Mathematical Model of COREX Process with Top Gas Recycling

2020 ◽  
pp. 2000292 ◽  
Author(s):  
Shun Yao ◽  
Shengli Wu ◽  
Shuyu Wang ◽  
Zhiyong Tang ◽  
Jiahui Yang ◽  
...  
Keyword(s):  
Mathematical Model ◽  
Top Gas Recycling ◽  
Gas Recycling
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