用羧甲基纤维素、聚丙烯酰胺、硫酸铝和氯化铁四种絮凝剂进行氧化铝微细颗粒的絮凝沉降研究。试验结果表明：在适宜的参数条件下，四种絮凝剂均可显著提高氧化铝微细颗粒的沉降速度。根据沉降颗粒的形貌探讨了有机絮凝剂和无机絮凝剂的絮凝沉降机理 Study on flocculation and settling of alumina fine particles with four kinds of flocculants: carboxymethylcellulose, polyacrylamide, aluminum sulfate and ferric chloride. The experimental results show that: under the appropriate parameters, the four kinds of flocculants can significantly improve the deposition rate of alumina fine particles. The flocculation and sedimentation mechanism of organic flocculant and inorganic flocculant were discussed according to the morphology of sedimentation particles