Poly aluminum ferric silicate( PSAF)is a new type of water soluble polymer electrolyte,which is a composite floccu-lant,has been widely used in the field of sewage treatment,is currently a very popular sewage treatment agent. The coal ash and slag as the main raw material,the Si,Al,Fe elements were extracted to polymerize reaction. Through the continuous opti-mization of the calcination temperature,acid leaching process conditions of temperature,curing temperature and curing time effect the best poly aluminum ferric silicate flocculant,and sewage treatment to evaluate its effect.%聚硅酸铝铁（ PSAF）是一种新型的水溶性高分子电解质，属于复合型絮凝剂，已经广泛应用于污水处理领域，是目前非常畅销的污水处理药剂。煤灰渣为主要原料，提取其中的Si、Al、Fe三种元素进行聚合反应。通过不断优化焙烧温度、酸浸温度、熟化温度、熟化时间等工艺条件得到效果最佳的聚硅酸铝铁絮凝剂，然后进行污水处理评价其效果。
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