Abstract The feasibility of recycling red mud waste by its direct transformation into highly-porous cellular ceramics was successfully demonstrated. Ceramic materials with designed cellular porosity were processed by emulsification of red mud suspensions with liquid paraffin. Taguchi method was used to study the effects provided by varying the red mud load in the suspension, gelatine content and emulsion stirring time on the micro structural features of the cellular ceramics. Additional experiments analysed the effects of the organic to suspension ratio and firing temperature. Emulsification of paraffin followed by gelatine consolidation, drying, elimination of the droplets of the discontinuous organic phase and firing, allowed one to design cellular ceramic pieces with open porosity up to 75%, consisting in interconnected cells with adjustable cell size and low resistance to percolation. These results allow one to consider prospective applications of red mud-based cellular ceramics with designed microstructures as highly-porous membranes for the capture of pollutants.

中文翻译：

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从单一赤泥前驱体直接加工蜂窝陶瓷

摘要 赤泥废物直接转化为高孔隙率蜂窝陶瓷进行回收利用的可行性得到了成功论证。通过用液体石蜡乳化赤泥悬浮液来加工具有设计多孔孔隙率的陶瓷材料。Taguchi 方法用于研究通过改变悬浮液中的赤泥负荷、明胶含量和乳液搅拌时间对多孔陶瓷微观结构特征的影响。另外的实验分析了有机物与悬浮液的比例和焙烧温度的影响。石蜡乳化、明胶固结、干燥、去除不连续有机相的液滴和烧制，允许设计具有高达 75% 开孔率的多孔陶瓷片，由具有可调单元尺寸和低渗透阻力的互连单元组成。这些结果使人们可以考虑将具有设计微结构的红泥基蜂窝陶瓷作为用于捕获污染物的高孔膜的前瞻性应用。