Numerical Analysis on Erosion and Optimization of a Blast Furnace Main Trough
The main trough of a blast furnace (BF) is a main passage for hot metal and molten slag transportation from the taphole to the torpedo and the slag handling. Its appropriate working status and controlled erosion ensure a safe, stable, high-efficiency and low-cost continuous production of hot metal....
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doaj-de1502a75e95496fa4b5f12c54a00a1d2021-09-09T13:50:49ZengMDPI AGMaterials1996-19442021-08-01144851485110.3390/ma14174851Numerical Analysis on Erosion and Optimization of a Blast Furnace Main TroughHao Yao0Huiting Chen1Yao Ge2Han Wei3Ying Li4Henrik Saxén5Xuebin Wang6Yaowei Yu7State Key Laboratory of Advanced Special Steel, Shanghai Key Laboratory of Advanced Ferrometallurgy, Department of Materials Engineering, School of Materials Science and Engineering, Shanghai University, Shanghai 200444, ChinaState Key Laboratory of Advanced Special Steel, Shanghai Key Laboratory of Advanced Ferrometallurgy, Department of Materials Engineering, School of Materials Science and Engineering, Shanghai University, Shanghai 200444, ChinaState Key Laboratory of Advanced Special Steel, Shanghai Key Laboratory of Advanced Ferrometallurgy, Department of Materials Engineering, School of Materials Science and Engineering, Shanghai University, Shanghai 200444, ChinaState Key Laboratory of Advanced Special Steel, Shanghai Key Laboratory of Advanced Ferrometallurgy, Department of Materials Engineering, School of Materials Science and Engineering, Shanghai University, Shanghai 200444, ChinaState Key Laboratory of Advanced Special Steel, Shanghai Key Laboratory of Advanced Ferrometallurgy, Department of Materials Engineering, School of Materials Science and Engineering, Shanghai University, Shanghai 200444, ChinaProcess and Systems Engineering Laboratory, Faculty of Science and Engineering, Åbo Akademi University, Henriksgatan 2, 20500 Abo, FinlandLaiSteel Technology Center, Laiwu Iron & Steel Co., LTD, Laiwu 271104, ChinaState Key Laboratory of Advanced Special Steel, Shanghai Key Laboratory of Advanced Ferrometallurgy, Department of Materials Engineering, School of Materials Science and Engineering, Shanghai University, Shanghai 200444, ChinaThe main trough of a blast furnace (BF) is a main passage for hot metal and molten slag transportation from the taphole to the torpedo and the slag handling. Its appropriate working status and controlled erosion ensure a safe, stable, high-efficiency and low-cost continuous production of hot metal. In this work, the tapping process of a main trough of a BF in the east of China was numerically studied with the help of a CFD library written in C++, called OpenFOAM, based on the use of the Finite Volume Method (FVM). The results show that turbulence intensity downstream of the hot metal impact position becomes weaker and the turbulence area becomes larger in the main trough. During the tapping, thermal stress of wall refractory reaches the maximum value of <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>1</mn><msup><mrow><mrow><mo>.</mo><mn>7</mn><mtext> </mtext><mo>×</mo><mtext> </mtext><mn>10</mn></mrow></mrow><mn>7</mn></msup></mrow></semantics></math></inline-formula> Pa at the 4 m position in the main trough. Furthermore, baffles in the main trough placed between 5.8 m and 6.2 m were found to control and reduce the impact of the turbulence on the refractory life. The metal flowrate upstream of the baffles can be decreased by 6%, and the flow velocity on the upper sidewall and bottom wall decrease by 9% and 7%, respectively, compared with the base model. By using baffles, the minimum fatigue life of the refractory in the main trough increases by 15 tappings compared with the base model, so the period between the maintenance stops can be prolonged by about 2 days.https://www.mdpi.com/1996-1944/14/17/4851main troughthermal stressfatigue liferefractoryOpenFOAM |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Hao Yao Huiting Chen Yao Ge Han Wei Ying Li Henrik Saxén Xuebin Wang Yaowei Yu |
spellingShingle |
Hao Yao Huiting Chen Yao Ge Han Wei Ying Li Henrik Saxén Xuebin Wang Yaowei Yu Numerical Analysis on Erosion and Optimization of a Blast Furnace Main Trough Materials main trough thermal stress fatigue life refractory OpenFOAM |
author_facet |
Hao Yao Huiting Chen Yao Ge Han Wei Ying Li Henrik Saxén Xuebin Wang Yaowei Yu |
author_sort |
Hao Yao |
title |
Numerical Analysis on Erosion and Optimization of a Blast Furnace Main Trough |
title_short |
Numerical Analysis on Erosion and Optimization of a Blast Furnace Main Trough |
title_full |
Numerical Analysis on Erosion and Optimization of a Blast Furnace Main Trough |
title_fullStr |
Numerical Analysis on Erosion and Optimization of a Blast Furnace Main Trough |
title_full_unstemmed |
Numerical Analysis on Erosion and Optimization of a Blast Furnace Main Trough |
title_sort |
numerical analysis on erosion and optimization of a blast furnace main trough |
publisher |
MDPI AG |
series |
Materials |
issn |
1996-1944 |
publishDate |
2021-08-01 |
description |
The main trough of a blast furnace (BF) is a main passage for hot metal and molten slag transportation from the taphole to the torpedo and the slag handling. Its appropriate working status and controlled erosion ensure a safe, stable, high-efficiency and low-cost continuous production of hot metal. In this work, the tapping process of a main trough of a BF in the east of China was numerically studied with the help of a CFD library written in C++, called OpenFOAM, based on the use of the Finite Volume Method (FVM). The results show that turbulence intensity downstream of the hot metal impact position becomes weaker and the turbulence area becomes larger in the main trough. During the tapping, thermal stress of wall refractory reaches the maximum value of <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>1</mn><msup><mrow><mrow><mo>.</mo><mn>7</mn><mtext> </mtext><mo>×</mo><mtext> </mtext><mn>10</mn></mrow></mrow><mn>7</mn></msup></mrow></semantics></math></inline-formula> Pa at the 4 m position in the main trough. Furthermore, baffles in the main trough placed between 5.8 m and 6.2 m were found to control and reduce the impact of the turbulence on the refractory life. The metal flowrate upstream of the baffles can be decreased by 6%, and the flow velocity on the upper sidewall and bottom wall decrease by 9% and 7%, respectively, compared with the base model. By using baffles, the minimum fatigue life of the refractory in the main trough increases by 15 tappings compared with the base model, so the period between the maintenance stops can be prolonged by about 2 days. |
topic |
main trough thermal stress fatigue life refractory OpenFOAM |
url |
https://www.mdpi.com/1996-1944/14/17/4851 |
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