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The Characterization and Sintering Behavior of Alumina Powder Prepared by Heat-treatment of Artificial Marble Waste Containing $Al(OH)_3$ Powder  

Ryu, Sung-Soo (Korea Institute of Ceramic Engineering and Technology)
Seo, Sung-Gyu (Korea Institute of Ceramic Engineering and Technology)
Kim, Hyung-Tae (Korea Institute of Ceramic Engineering and Technology)
Kim, Hyeong-Jun (Korea Institute of Ceramic Engineering and Technology)
Park, Jun-Gyu (Dasan Consultants Co., Ltd)
Yang, Jae-Gyu (Kwangwoon University)
Publication Information
Resources Recycling / v.18, no.2, 2009 , pp. 69-76 More about this Journal
Abstract
Alumina powder was prepared from heat-treatment of artificial marble waste fine aggregate containing $Al(OH)_3$ for the purpose of the feasibility of its recycling. Artificial marble waste was heat-treated between $500^{\circ}C$ and $1000^{\circ}C$ and XRD, BET surface area, BJH pore size distribution and adsorption of As were analyzed for heat-treated powder. It was found that the adsorption efficiency of As was significantly affected by phase composition of alumina powder rather than its physical characteristic. Heat-treated powder compact was sintered to produce the pellet. Alumina pellet with porosity more than 60% could be obtained after sintering below $1200^{\circ}C$ and also the addition of glass powder as a sintering aid had a positive effect on lowering sintering temperature, led to the high porosity near 60% and adsorption of As over 60% even at $900^{\circ}C$.
Keywords
Artificial marble; Industrial waste; Alumina; Recycling; Adsorption of As;
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