该方法是通过加入含有多价酸根和铁离子添加剂,并改变反应温度和时间,使产品改性。其技术特点是经焙烧活化的煤矸石用盐酸加含多价酸根的添加剂进行酸浸,浸出液加入一定量的铁盐,并用活化的煤矸石粉作盐基度调整剂,不需要加其它含铝原料。产品属铝铁多核混合配体物种,混凝效能明显优干聚羟基氯化铝, The method is to modify the product by adding a polyvalent acid and iron ion additive and changing the reaction temperature and time. Its technical feature is that the calcined and activated coal gangue is used for acid leaching with hydrochloric acid plus additives containing polyvalent acid radicals, a certain amount of iron salts is added in the leaching solution, and activated coal gangue powder is used as a salt radical degree adjusting agent, without adding other aluminum-containing additives. raw material. The product is a multi-nuclear iron-aluminum mixed ligand species, and the coagulation efficiency is significantly superior to polyaluminum hydroxychloride.