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Preparation of Foamed Glass Block from Recycled Soda-lime-silicate Glasses by Chemical Composition Control  

Kim, Jung-Min (Department of Chemical Engineering, Dankook University)
Lee, Chul-Tae (Department of Chemical Engineering, Dankook University)
Publication Information
Applied Chemistry for Engineering / v.24, no.4, 2013 , pp. 382-390 More about this Journal
Abstract
Foaming process of waste soda lime glasses by just chemical composition control of vitreous feed materials was investigated to find a novel and efficient recycling process. For the chemical composition control of feed materials, 10 wt. parts of $SiO_2$, 0.5 wt. parts of $Na_2SO_4$, 3.0 wt. parts of $B_2O_3$, and 0.3 wt. parts of carbon black as the foaming agent were mixed with 100 wt. parts of soda-lime vitreous feed powder. Proper conditions for foaming process in tunnel kiln are the foaming temperature of $830{\sim}850^{\circ}C$, the foaming time of 30~35 min, and the vitreous feed powder particle size of -325 mesh. Properties of foamed glass blocks obtained under these foaming conditions showed the density of $0.17{\sim}0.21g/cm^3$, thermal conductivity of $0.06{\pm}0.005kcal/h{\cdot}m{\cdot}^{\circ}C$, moisture absorption of 1.1~1.5%, and compressive strength of $20{\sim}30kgf/mm^2$.
Keywords
foamed glass; recycling; waste soda-lime glass;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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