Feasible recycling of industrial waste coal fly ash for preparation of anorthite-cordierite based porous ceramic membrane supports with addition of dolomite

摘要

Recycling of industrial solid state waste is always the priority solution in the prospect of waste management. This work demonstrated a new method converting coal fly ash (CFA) industrial waste to anorthite-cordierite-based porous ceramic membrane supports (ACCMS), through high-temperature sintering with additions of dolomite mineral. Characterization of as-prepared ACCMS included phase composition, microstructure, pore structure, N-2 and water permeability, and mechanical properties. From dilatometric measurements, the densification temperature of a sample with 28.43 wt.% dolomite addition was extended to 1100 degrees C compared to 1060 degrees C for that of a sample without any dolomite. For samples sintered at 1150 degrees C, their open porosity increased from 25.2 +/- 0.5% to 46.5 +/- 0.2% when dolomite addition increased from 0 to 28.43 wt.%. It is suggested that this level of dolomite addition significantly inhibited the sintering behavior of CFA. (C) 2015 Elsevier Ltd. All rights reserved.