QI Hao 1, HE Feng 1, YAN Fangling 2, WANG Yu 2, XIE Junlin 1
(1. State Key Laboratory of Silicate Material for Architectures, Wuhan University of Technology, Wuhan 430070, Hubei, China;
2. Jinduicheng Molybdenum Group Company, Weinan 714102, Shaanxi, China)
Abstract: High-performance foam glass-ceramics were prepared by sintering method, using molybdenum tailings as the main raw material,carbon as the foaming agent, and borax as the accelerating agent. The effects of tailings ration on the phase composition, density, thermal conductivity, and pore structure were studied by TG-DSC, XRD, and SEM. The results indicate the best mixing ratio of molybdic tailings is 40 wt.%, the main crystalline of foam glass-ceramic is calcium magnesium iron silicate (Ca0.90 Mg0.71Fe0.25Si2O6), the density of the product is 0.2 kg/m3, the thermal conductivity is 0.089 W/(m·K), and the average bubble size is 0.8-1.2 mm.
Key words: molybdic tailings; foam glass-ceramic; tailings ratio