Effect of Hearth Liquid Level on the Productivity of Blast Furnace
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Cast house is the heart of blast furnace operation. A stable blast furnace operation requires proper control of hot metal and slag drainage from the hearth. Various problems are encountered if the hearth liquid level exceeds above a critical limit that leads to an unstable blast furnace condition. Moreover, operating too often to control liquid level is also not recommended, as operational cost is increased and refractory erosion increases. Therefore, there is a need to understand the reason that prevails in the abnormal hearth liquid level situations. Understanding the effect of increased hearth liquid level on blast furnace process parameters will enable blast furnace operation to take the proactive actions of controlling the blast furnace abnormality. In the present review, an attempt is made to establish a correlational research to understand the effect on hearth liquid level on various casting parameters and blast furnace process conditions. The adverse effect of hearth liquid level build-up on the state of dead man, gas permeability, tuyere life, hearth linings, slag delay and furnace wall heat load is studied. The various casting strategies adopted in blast furnace operation are discussed along with their advantages and disadvantages, and finally, the recommendations are made to operate the liquid level on narrow band.
KeywordsBlast furnace Hearth Liquid level Dead man Drainage rate Permeability
We would like to acknowledge entire BF operation and technology group of Tata Steel Jamshedpur for extending their operational knowledge. We are also grateful to Automation Division Jamshedpur for providing us opportunity to carry out the above work.
- 2.Upadhyay H and Kundu T K, ISRN Metall (2013) 1.Google Scholar
- 8.Agrawal A, Vishwakarma R K, Tripathi V R, Kothari A K, Prasad B, Kumar J, Ghosh U, Tiwari M, Kundu S, Agarwal M K, and Murthy G S R, Ironmak Steelmak (2017). https://doi.org/10.1080/03019233.2017.1400732.
- 9.Fedorov I P and Bugaev S F, Metallurgist 50 (2006) 519.Google Scholar
- 10.Kurunov I F, Loginov V N, and Tikhonov D N, Metallurgist 50 (2006) 605.Google Scholar
- 11.Kurunov I F, Loginov V N, and Tikhonov D N, Metallurgist 51 (2007) 7.Google Scholar
- 12.Kumar A, Ali Khan S, Biswas S, and Pal A, Ironmak Steelmak 37 (2010) 15.Google Scholar
- 15.Wang G X, Chew S J, Yu A B, and Zulli P, ISIJ Int 37 (1997) 573.Google Scholar
- 18.Shen Y, Guo B, Chew S, Austin P, and Yu A, Metall Mater Trans B 46B (2015) 432.Google Scholar
- 19.Ishii J, Murai R, Sumi I, Yongxiang Y, and Boom R, ISIJ Int 57 (2017) 1531.Google Scholar
- 22.Andreev K, Louwerse G, Peeters T, and van der Stel J, Ironmak Steelmak 44 (2017) 81.Google Scholar
- 23.Havelange O, Danloy G, and Franssen C, La Revue de Métallurgie-CIT Mars (2004) 195.Google Scholar
- 24.Pintowantoro S, Nogami H, and Yagi J I, ISIJ Int 44 (2004) 304.Google Scholar
- 25.Zhang H, Guo Y, and Chen C, Ironmak Steelmak (2017). https://doi.org/10.1080/03019233.2017.1320083.
- 26.Nightingale R J, Dippenaar R J, and Lu W K, Metall Mater Trans B 31b (2000) 993.Google Scholar
- 27.Jiang Z H, Pan D, Gui W H, Xie Y F, and Yang C H, Ironmak Steelmak (2016). https://doi.org/10.1080/03019233.2016.1254423.
- 28.Ito T, Yotsuji J, and Nagamune A, ISIJ Int 54 (2014) 2618.Google Scholar
- 31.Upadhyay A and Kumar A, Tata Search (2002) 59.Google Scholar
- 33.Kaymak Y, Hauck T, Lin R, and Rausch H, Simulation of Slag/Gas and Slag/Iron Interface Tilting in Blast Furnace Hearth during Slag Tapping. Comsol Conference Rotterdam, at Rotterdam (2017).Google Scholar
- 34.Wang H, Zhang J, Liu Z, Wang G, Jiao K, Liu D, Yan X, and Yang T, Ironmak Steelmak (2017). https://doi.org/10.1080/03019233.2017.1303912.
- 35.Barman S C, Prachethan Kumar P, Uddar L, Mahapatra P C, Sekhar V R, and Ranjan M, Ironmak Steelmak 37 (2010) 98. https://doi.org/10.1179/030192309x12549935902220.
- 36.Duarte R M, Ruiz-Bustinza I, Carrascal D, Verdeja L F, Mochón J, and Cores A, Ironmak Steelmak 40 (2013) 350.Google Scholar
- 37.Shibata K, Kimura Y, Shimizu M, and Inaba S, ISIJ Int 30 (1990) 208.Google Scholar
- 38.Shibata K, Kimura Y, Shimizu M, and Inaba S, Le Revue de Metallurgie- CIT, Avril (1990) 333.Google Scholar
- 39.Vats A K and Dash S K, Ironmak Steelmak 27 (2000) 123.Google Scholar
- 41.Panjkovic V, Truelove J S, and Zulli P, Ironmak Steelmak 29 (2002) 390.Google Scholar
- 44.Torrkulla J, Brännbacka J, Saxén H, and Waller M, ISIJ Int 42 (2002) 504.Google Scholar
- 45.Geerdes M, Toxopeus H, van der Vlient C, et al. Modern Blast Furnace Iron Making: An Introduction, pp. 1–164, IOS (2009).Google Scholar
- 47.Alter M A, Brunner J M, and Holmes D J, Continuous Monitoring of Liquid Level and Thermal State in the Hearth Based on Measurement of EMF on the Blast Furnace Shell. AISTech Proceedings (2012), p 429.Google Scholar
- 48.Agrawal A, Kothari A K, Ramna R V, Padmapal, and Singh M K, Metall Res Technol (2018). https://doi.org/10.1051/metal/2018100 (accepted article).