本文研究了4种具有不同链长的叔胺对胶磷矿中石英的浮选行为。研究表明:4种叔胺在pH=6.0~8.0,浓度为0.1mmol/L的条件下对石英具有较好的捕收能力,且N,N-二甲基十四胺捕收能力最强,其次是N,N-二甲基十二胺,N,N-二甲基十八胺捕收能力最弱,说明捕收剂碳链长度对石英的浮选性能有重要影响。 In this paper, we studied the flotation behavior of four kinds of tertiary amines with different chain lengths on quartz in colloidal phosphate rock. The results show that the four kinds of tertiary amines have good ability of collecting quartz at pH = 6.0-8.0 and concentration of 0.1 mmol / L, and N, N-dimethyl-tetradecyl amine has the best ability of catalysis. Followed by N, N-dimethyl dodecylamine, N, N-dimethyl octadecylamine capture capacity is the weakest, indicating that the carbon chain length collector has a significant impact on the flotation performance of quartz.