Preparation of Foamed Ceramics from Graphite Tailings Using A Self-Foaming Method

Graphite tailings were used as the raw materials for preparation of foamed ceramics via a high-temperature self-foaming method. The residual carbon in acted foaming agent and no additional agents required. reacted with Fe2O3 produced gas that was wrapped by liquid phase to form porous structure. effects sintering temperature, holding time, content, flux on bulk density, water absorption, mean pore size investigated. compressive strength, thermal conductivity, absorption ceramic prepared using optimal sample D100 (100 wt% graphite tailings) sintered at 1200 °C 20 min 1.36 g/cm3, 0.35%, 12.03 MPa, 0.51 W/(m·K), respectively. material contained CaO, Fe2O3, SiO2, which formed augite low fusibility point. In contrast, molten decomposition products potassium feldspar CaSiO3 ions anorthite, has high Therefore, is not recommended use tailing systems calcium content. Foamed up 100 tailings. This new approach economical disposal