为了提高二聚酸副产物单体酸的价值，分析了单体酸成分，主要含有饱和、不饱和和异构脂肪酸。采用尿素包合法获得含量较高的异构脂肪酸，分别与原料、油酸复配后构成了一系列捕收剂，并用于鞍山齐大山铁矿石浮选试验。通过实验室开路和闭路浮选试验结果表明：浮选温度为25℃时，精矿铁品位66．38％，尾矿铁品位14．90％，铁回收率84．19％。与KS‐Ⅱ浮选药剂相比，在降尾、铁回收率和降低药剂用量方面有优势。%To improve the value of monomer acid from dimmer acid byproduct ,the compositions of the monomer acid ,w hich are mixed by saturated ,unsaturated and isomeric fatty acid compose ,are analyzed . Isomeric fatty acid by wraping urea is mixed with monomer acid ,oleic acid to form some flotation reagents , which is used in Anshan iron ores flotation tests .The results of open circuit and close circuit shows that , when the temperature is 25℃ ,the Fe concentration was enriched to a concentration of 66 .38% .The Fe concentration in tailing was reduced to only 14 .90% .The recovery of Fe is 84 .19% .Compared with KS‐Ⅱflotation reagents ,it can improve Fe recovery ,decrease Fe in tailing and reduce the consumption of collector .
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