Papers by Keyword: Foam Ceramic

Abstract: High-temperature foam ceramics were produced from sludge, Zhongxiang porcelain sand, shale and sand, with addition of SiC 0.15%~0.40% as foaming agent, respectively, sintered at 1130°C~1160°C. The phase composition and micro structure of sintered samples were investigated by X-ray diffraction (XRD) and scanning electron microscopy (SEM), and density, compressive strength and thermal conductivity were evaluated. The results showed that the main phase of amorphous phase plagioclase in sintered samples and interior of samples with a large number of uniformly distributed closed pores, rose sintering temperature and increased SiC addition leading to pores size enlarged and density, compressive strength and thermal conductivity diminished.

Abstract: The simulation test device of filtration for high temperature dusty gas was established based on rotating foam ceramic material. The influence of performance parameter of foam ceramic on collection efficiency, concentration of dust emission, dedusting precision and pressure loss were researched under room temperature condition. The results are shown as following: the smaller the aperture of foam ceramics is, the higher filter efficiency, the overall collection efficiency and filter precision are with lower emission concentration of dust and higher gas pressure loss of dedusting system; about 95% of dust particles which is one twenty-sixth more than the aperture of the filter can be filtered by foam ceramic; increasing the thickness is effective ways to improve the filter efficiency at the expense of much increasing gas filtering resistance of dedusting system; with the increasing of foam ceramic aperture-gradient, gas filtering resistance reduces remarkably at the expense of slight reduction of filter efficiency and a little increase of the concentration of dust emission.

Abstract: In this paper a foam ceramic was prepared from clay, silicon carbide, ferric oxide, feldspar and other raw materials. The content of ferric oxide and the powder size of silicon carbide influenced the sinter behavior of the foam ceramics. The ferric oxide and feldspar are favorable to form of glass phase in the ceramics. The foam ceramics with the rate of moisture absorption is less than 0.05%, the bulk density is 0.3~0.9g/cm3, and compressive strength is over than 2MPa.