关键词: 镁渣;粉煤灰;多孔陶瓷;造孔剂;增强剂

Abstract: The porous ceramics with pore-forming agent ( carbon powder , carbide slag ) and reinforcement ( kaoline , bentonite ) were prepared by using magnesium slag and flyash .The influence of type and content of the binder and pore-forming agent on the properties of the porous ceramics were studied .The results show that the ablation ratio , water absorption , and porosity of the porous ceramics increase , the density and compression strength decrease after adding of pore-forming agent .The carbon powder has better pore-forming effect than the carbide slag with the same content on the porous ceramics .The highest value of the ablation ratio , water absorption and porosity are 30％, 38％ and 53％, respectively .The minimum of the density is 1.4 g/cm3 .After adding the reinforcement , the compressing strength of the porous ceramics increases dramatically , while the water absorption and porosity decrease and the density increase .With contents of no less than 10％, the reinforcement effect of the kaoline is better than that of the bentonite of the same content .The crushing strength of the porous ceramics reaches as high as 28 MPa as the content of kaoline is 10％or bentonite is 30％.

Key words: magnesium slag;fly ash;porous ceramic;pore-forming agent;reinforcement