煤矸石污泥陶粒烧胀性能研究

Study on the firing expansion of ceramsite with coal gangue added sludge

通过对太湖流域某污水处理厂经干燥处理过的污泥的化学成分分析,得出使用该污泥作为原料不可能烧制出合格陶粒,必须掺配富含硅、铝元素的辅助原料.以富含硅、铝元素的煤矸石为辅助原料,与污泥进行不同比例的掺配,进而研究污泥掺配量、预烧时间与预烧温度、焙烧时间与焙烧温度对陶粒烧胀性能的影响.研究表明：以煤矸石为辅助原料,污泥的最高掺配量高达60%,可以焙烧出密度等级为600~900级的陶粒,但陶粒样品的1h吸水率均超出相应等级密度的标准值.因此,不适合作为污泥陶粒的辅助原料.

Through the analysis of chemical composition of dried sludge from a sewage treatment plant in Taihu ba？sin, it is concluded that the use of the sludge as raw material can not fire qualified ceramsite, and must mix someauxiliary material which is rich in silicon and aluminum.