Melting treatment of waste asbestos using mixture of hydrogen and oxygen produced from water electrolysis

作者：Min Soon Young; Maken Sanjeev; Park Jin Won^*; Gaur Ankur; Hyun Jang Soo

来源：Korean Journal of Chemical Engineering, 2008, 25(2): 323-328.

DOI：10.1007/s11814-008-0055-9

• waste asbestos
• Brown's gas
• basicity
• vitrification
• stabilization

In this study, we melted four types of waste asbestos containing material such as spread asbestos, plasterboard asbestos, slate asbestos and asbestos 99 wt%, in a melting furnace at 1,450-1,550 that uses a mixture of hydrogen and oxygen (Brown's gas) as a fuel. More volatile components (CaO, K2O) are enriched in spread asbestos, plasterboard asbestos, and slate asbestos, while less volatile compounds (SiO2, FeO2, MgO) remain in asbestos 99%. Through basicity of raw materials, spread asbestos, plasterboard asbestos, and slate asbestos were found to have more alkalinity, and asbestos 99% was found more acidic. SEM and EDX results revealed that all raw materials had various kinds of asbestos fiber. Spread asbestos, plasterboard asbestos, and slate asbestos were considered as tremolite asbestos, whereas asbestos 99% was considered as chtysotile asbestos. It was further confirmed by SEM and XRD studies that all waste materials contained some crystalline structures which transformed into amorphous glassy structure on melting. Also, in case of added glass culler during the melting of spread asbestos, it transformed the raw material into a perfect vitrified product having more glassy surface and amorphous in nature.

• 出版日期2008-3