Effect of water washing pre-treatment on the properties of glass-ceramics from incinerator fly ash using electronic arc furnace

被引：16
作者：
Liu Hanqiao [1 ,2 ]
Wei Guoxia [1 ]
Zhang Rui [1 ]
机构：
[1] Tianjin Inst Urban Construct, Coll Energy & Safety Engn, Tianjin 300384, Peoples R China
[2] Tsinghua Univ, Key Lab Solid Waste Management & Environm Safety, Minist Educ China, Beijing 100084, Peoples R China
来源：
JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION | 2013年 / 28卷 / 01期
基金：
中国国家自然科学基金;
关键词：
waste incineration fly ash; arc-melting; glass-ceramics; water washing; METALS; EXTRACTION; BEHAVIOR; BOTTOM; RAW;
D O I：
10.1007/s11595-013-0641-5
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Production of glass-ceramics by sintering the molten slag obtained from electric arc furnace treatment of fly ash was investigated. The effect of washing pretreatment prior to melting the fly ash on the microstructure and properties of the glass-ceramics was examined. The results show that washing pretreatment of fly ash can decrease alkali metal chloride and increase network former in fly ash, which results in the increase of peak crystallization temperature of parent glass and strengthening of properties of bending strength and chemical stability of the glass-ceramics. The optimal heat treatment temperature for parent glass of washed fly ash is 1 173 K, at which the crystalline phase of glass-ceramics is composed of gelignite (Ca2Al2SiO7) and akermanite (Ca2MgSi2O7). Glass-ceramics produced at optimal heat treatment temperature are excellent in term of the physical and chemical properties and leaching characteristics, indicating attractive potential as substitute of nature materials.
引用
收藏
页码：62 / 68
页数：7
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