Utilization of coal fly ash in the glass-ceramic production.
Manufacturing the glass-ceramic has been proposed as a useful choice to recycle coal fly ash from power plants. In this work, a glass-ceramic of SiO2-Al2O3-Fe2O3-CaO family was synthesized by mixing 90 wt% of coal fly ash, from a power plant in west of China, with Na2O, and then melted at 1350 degrees C. The ceramization of the obtained glass was carried out at 770 degrees C for 2h. Esseneite and nepheline were found present as major crystal phases. The produced glass-ceramic exhibited good chemical durability as well as good mechanical properties. The toxicity characteristic leaching procedure (TCLP) method found that the glass-ceramic was non-hazardous.
Zhang
Jian
J
College of Chemical Engineering and Materials Science, Zhejiang University of Technology, Hangzhou, Zhejiang 310014, China.
Dong
Wen
W
Li
Juan
J
Qiao
Liang
L
Zheng
Jingwu
J
Sheng
Jiawei
J
D002244:Carbon / Q000737:chemistry*; D002516:Ceramics / Q000737:chemistry*; D060729:Coal Ash; D005898:Glass / Q000737:chemistry*; D019216:Metals, Heavy / Q000737:chemistry; D008855:Microscopy, Electron, Scanning; D010087:Oxides / Q000737:chemistry; D052638:Particulate Matter / Q000737:chemistry*; D014961:X-Ray Diffraction
D060729:Coal Ash; D019216:Metals, Heavy; D010087:Oxides; D052638:Particulate Matter; D002244:Carbon