期刊
WASTE MANAGEMENT
卷 32, 期 12, 页码 2306-2314出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.wasman.2012.05.040
关键词
Bottom ash; Fly ash; Crystallization; Cooling duration; Glass-ceramic
资金
- Waste Management and Resource Recovery Group, Graduate Institute of Environmental Engineering, National Central University, Jhongli, Taoyuan, Taiwan [32001]
Along with the gradually increasing yield of the residues, appropriate management and treatment of the residues have become an urgent environmental protection problem. This work investigated the preparation of a glass-ceramic from a mixture of bottom ash and fly ash by petrurgic method. The nucleation and crystallization kinetics of the new glass-ceramic can be obtained by melting the mixture of 80% bottom ash and 20% fly ash at 950 degrees C, which was then cooled in the furnace for 1 h. Major minerals forming in the glass-ceramics mainly are gehlenite (Ca2Al2SiO7) & akermanite (Ca2MgSiO7) and wollastonite (CaSiO3). In addition, regarding chemical/mechanical properties, the chemical resistance showing durability, and the leaching concentration of heavy metals confirmed the possibility of engineering and construction applications of the most superior glass-ceramic product. Finally, petrurgic method of a mixture of bottom ash and fly ash at 950 degrees C represents a simple, inexpensive, and energy saving method compared with the conventional heat treatment. (c) 2012 Elsevier Ltd. All rights reserved.
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