Glass-ceramic from mixtures of bottom ash and fly ash

作者：Dinh Hieu Vu^*; Wang Kuen Sheng; Chen Jung Hsing; Bui Xuan Nam; Bui Hoang Bac

来源：Waste Management, 2012, 32(12): 2306-2314.

DOI：10.1016/j.wasman.2012.05.040

• Bottom ash
• Fly ash
• Crystallization
• Cooling duration
• Glass-ceramic

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) %26 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.

• 出版日期2012-12
• 单位中央民族大学