NDLI: Thermodynamic Analysis of Blast Furnace Slag Waste Heat-Recovery System Integrated with Coal Gasification

Content Provider	Springer Nature Link
Author	Duan, W. J. Li, P. Lei, W. Chen, W. Yu, Q. B. Wang, K. Qin, Q.
Copyright Year	2015
Abstract	The blast furnace (BF) slag waste heat was recovered by an integrated system stage by stage, which combined a physical and chemical method. The water and coal gasification reactions were used to recover the heat in the system. Based on the first and second law of thermodynamics, the thermodynamic analysis of the system was carried out by the enthalpy–exergy diagram. The results showed that the concept of the “recovery-temperature countercurrent, energy cascade utilization” was realized by this system to recover and use the high-quality BF slag waste heat. In this system, the high-temperature waste heat was recovered by coal gasification and the relatively low-temperature waste heat was used to produce steam. The system’s exergy and thermal recycling efficiency were 52.6% and 75.4%, respectively. The exergy loss of the integrated system was only 620.0 MJ/t$_{slag}$. Compared with the traditional physical recycling method producing steam, the exergy and thermal efficiencies of the integrated system were improved significantly. Meanwhile, approximately 182.0 m$^{3}$/t$_{slag}$ syngas was produced by coal gasification. The BF slag waste heat will be used integrally and efficiently by the integrated system. The results provide the theoretical reference for recycling and using the BF slag waste heat.
Starting Page	1079
Ending Page	1085
Page Count	7
File Format	PDF
ISSN	10474838
Journal	JOM
Volume Number	67
Issue Number	5
e-ISSN	15431851
Language	English
Publisher	Springer US
Publisher Date	2015-04-14
Publisher Institution	The Minerals, Metals & Materials Society (TMS)
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Engineering Chemistry/Food Science Physics Environment Earth Sciences
Content Type	Text
Resource Type	Article
Subject	Engineering Materials Science

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