Preparation of Slag Wool by Integrated Waste-Heat Recovery and Resource Recycling of Molten Blast Furnace Slags: From Fundamental to Industrial Application

The present paper investigated the process of the slag wool fabrication using high temperature blast furnace (BF) slag modified by coal ash (CA). The liquidus temperature and viscosity of the slag system with different mass ratios of BF slag and CA were measured through an inner cylinder rotation me...

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Bibliographic Details
Published in:Energies (Basel) 2014-05, Vol.7 (5), p.3121-3135
Main Authors: Zhao, Dawei, Zhang, Zuotai, Tang, Xulong, Liu, Lili, Wang, Xidong
Format: Article
Language:English
Subjects:
Air pollution
Civil engineering
Coal
coal ash
Construction
Cylinders
Energy consumption
Fly ash
Heat
Heat recovery systems
High temperature
industrial application
Industrial plant emissions
Insulation
Liquidus
Mass ratios
Methods
molten BF slag
Pollutants
Raw materials
Slag
Slag wool
Slags
Thermal properties
Viscosity
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Summary:The present paper investigated the process of the slag wool fabrication using high temperature blast furnace (BF) slag modified by coal ash (CA). The liquidus temperature and viscosity of the slag system with different mass ratios of BF slag and CA were measured through an inner cylinder rotation method. The approximate mass ratio used to fabricate the slag wool was therefore determined and slag wool was then successfully prepared with a high-speed air injection method in the laboratory. The effect of mBF/m ratio, slag temperature for injection and air pressure on the preparation of slag wool was systematically investigated. The mechanical and thermal properties were also studied to confirm the long-term working conditions of the slag wool. An industry-scale slag wool production application was established. The energy consumption and the pollutant generation, were analyzed and compared with the traditional production method, which indicated a 70% reduction in energy consumption and a 90% pollution emission decrease.
ISSN:1996-1073
1996-1073
DOI:10.3390/en7053121