Monitoring Liquid Level of Blast Furnace Hearth and Torpedo Ladle by Electromotive Force Signal
The state of a blast furnace hearth, especially the liquid level of hot metal and slag during the tapping process, is of crucial importance with respect to a long campaign blast furnace. In practice, the state of the hearth is evaluated mainly by the experience of operators. In this paper, the elect...
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MDPI AG
2018-08-01
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| Series: | Metals |
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| Online Access: | http://www.mdpi.com/2075-4701/8/9/665 |
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| author | Ying Li Lei Zan Yao Ge Han Wei Zhenghao Zhang Chuanguang Bi Kaicheng Lu Yaowei Yu |
| author_facet | Ying Li Lei Zan Yao Ge Han Wei Zhenghao Zhang Chuanguang Bi Kaicheng Lu Yaowei Yu |
| author_sort | Ying Li |
| collection | DOAJ |
| description | The state of a blast furnace hearth, especially the liquid level of hot metal and slag during the tapping process, is of crucial importance with respect to a long campaign blast furnace. In practice, the state of the hearth is evaluated mainly by the experience of operators. In this paper, the electromotive force (EMF) is used to monitor the liquid level of a laboratory scale of blast furnace hearth and the effect of liquid level, EMF sensors position and the thickness of refractory on EMF signals are tested using a single layer of water and double layers of water and oil. After laboratory experiments, the electromotive force (EMF) is used to monitor the liquid level of torpedo ladle successfully. Laboratory experimental results show that the change in liquid level can be characterized by EMF signal. The state of liquid surface and local thermal state cause the EMF signal to vary in the circumferential direction of the vessel. Furthermore, the EMF signal magnitude decreases with the decrease of the thickness of the graphite crucible. Finally, the main conclusions of the laboratory experiment are supported by the torpedo ladle experiment. |
| first_indexed | 2024-12-20T02:01:13Z |
| format | Article |
| id | doaj.art-5a28d519482c4f3180a3381b49684c1d |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-12-20T02:01:13Z |
| publishDate | 2018-08-01 |
| publisher | MDPI AG |
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| series | Metals |
| spelling | doaj.art-5a28d519482c4f3180a3381b49684c1d2022-12-21T19:57:18ZengMDPI AGMetals2075-47012018-08-018966510.3390/met8090665met8090665Monitoring Liquid Level of Blast Furnace Hearth and Torpedo Ladle by Electromotive Force SignalYing Li0Lei Zan1Yao Ge2Han Wei3Zhenghao Zhang4Chuanguang Bi5Kaicheng Lu6Yaowei Yu7State Key Laboratory of Advanced Special Steel, Shanghai Key Laboratory of Advanced Ferrometallurgy, School of Materials Science and Engineering, Shanghai University, Shanghai 200444, ChinaState Key Laboratory of Advanced Special Steel, Shanghai Key Laboratory of Advanced Ferrometallurgy, School of Materials Science and Engineering, Shanghai University, Shanghai 200444, ChinaState Key Laboratory of Advanced Special Steel, Shanghai Key Laboratory of Advanced Ferrometallurgy, School of Materials Science and Engineering, Shanghai University, Shanghai 200444, ChinaState Key Laboratory of Advanced Special Steel, Shanghai Key Laboratory of Advanced Ferrometallurgy, School of Materials Science and Engineering, Shanghai University, Shanghai 200444, ChinaTechnology Center, Shanghai Meishan Iron & Steel Co., Ltd., Baosteel, Nanjing 210039, ChinaTechnology Center, Shanghai Meishan Iron & Steel Co., Ltd., Baosteel, Nanjing 210039, ChinaTechnology Center, Shanghai Meishan Iron & Steel Co., Ltd., Baosteel, Nanjing 210039, ChinaState Key Laboratory of Advanced Special Steel, Shanghai Key Laboratory of Advanced Ferrometallurgy, School of Materials Science and Engineering, Shanghai University, Shanghai 200444, ChinaThe state of a blast furnace hearth, especially the liquid level of hot metal and slag during the tapping process, is of crucial importance with respect to a long campaign blast furnace. In practice, the state of the hearth is evaluated mainly by the experience of operators. In this paper, the electromotive force (EMF) is used to monitor the liquid level of a laboratory scale of blast furnace hearth and the effect of liquid level, EMF sensors position and the thickness of refractory on EMF signals are tested using a single layer of water and double layers of water and oil. After laboratory experiments, the electromotive force (EMF) is used to monitor the liquid level of torpedo ladle successfully. Laboratory experimental results show that the change in liquid level can be characterized by EMF signal. The state of liquid surface and local thermal state cause the EMF signal to vary in the circumferential direction of the vessel. Furthermore, the EMF signal magnitude decreases with the decrease of the thickness of the graphite crucible. Finally, the main conclusions of the laboratory experiment are supported by the torpedo ladle experiment.http://www.mdpi.com/2075-4701/8/9/665blast furnacehearthliquid levelthermal stateEMF |
| spellingShingle | Ying Li Lei Zan Yao Ge Han Wei Zhenghao Zhang Chuanguang Bi Kaicheng Lu Yaowei Yu Monitoring Liquid Level of Blast Furnace Hearth and Torpedo Ladle by Electromotive Force Signal Metals blast furnace hearth liquid level thermal state EMF |
| title | Monitoring Liquid Level of Blast Furnace Hearth and Torpedo Ladle by Electromotive Force Signal |
| title_full | Monitoring Liquid Level of Blast Furnace Hearth and Torpedo Ladle by Electromotive Force Signal |
| title_fullStr | Monitoring Liquid Level of Blast Furnace Hearth and Torpedo Ladle by Electromotive Force Signal |
| title_full_unstemmed | Monitoring Liquid Level of Blast Furnace Hearth and Torpedo Ladle by Electromotive Force Signal |
| title_short | Monitoring Liquid Level of Blast Furnace Hearth and Torpedo Ladle by Electromotive Force Signal |
| title_sort | monitoring liquid level of blast furnace hearth and torpedo ladle by electromotive force signal |
| topic | blast furnace hearth liquid level thermal state EMF |
| url | http://www.mdpi.com/2075-4701/8/9/665 |
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