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研究了（NH_4）_2SO_4存在下，KI-抗坏血酸．乙醇体系萃取浮选Cu（Ⅱ）的行为。试验表明，I-与被抗坏血酸还原的Cu（Ⅰ）形成CuI沉淀能萃取浮选在乙醇/水两相之间。当溶液pH1~5时，能使Cu（Ⅱ）与Fe（Ⅲ）、CO（Ⅱ）、Ni（Ⅱ）、Mn（Ⅱ）、Zn（Ⅱ）、Al（Ⅲ）、Cr（Ⅲ）、Mo（Ⅵ）、Cd（Ⅱ）分离。
KI-ascorbic acid was studied in the presence of (NH_4) _2SO_4. Flotation Behavior of Cu (Ⅱ) with Ethanol System. Experiments show that I- and Cu (I) reduced by ascorbate form a CuI precipitate that can be extracted by flotation between ethanol / water two phases. When the solution pH is 1 ~ 5, the effects of Cu (Ⅱ) and Fe (Ⅲ), CO (Ⅱ), Ni (Ⅱ), Mn (Ⅱ) (Ⅵ), Cd (Ⅱ).