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为了改善细磨矿石(75％<75微米)中硫化和氧化矿物(如CuFeS_2)的浮选选择性与回收率,使用泡沫浮选法和本发明的起泡剂是适宜的。本发明的起泡剂是:(a)C1～20的羟基链烷(包括环烷)或单或二糖类与(b)丙烯氧化物与<50摩尔百分数的乙烯氧化物反应的产物。这种反应产物的平均克分子量为150～1400。在使用常用的捕收剂与任意别的起泡剂时,本起泡剂最佳用量为0.005～0.05公斤/吨(矿石)。于是500克含黄铜矿的
In order to improve the flotation selectivity and recovery of sulphided and oxidic minerals (eg CuFeS 2) in finely ground ores (75% <75 μm), froth flotation and the foaming agent of the present invention are suitable. The foaming agent of the present invention is: (a) a product of the reaction of a hydroxyalkane (including naphthenic) or mono- or disaccharides of C1-20 with (b) a propylene oxide with <50 mole percent ethylene oxide. The average molecular weight of this reaction product ranges from 150 to 1400. The optimum amount of foaming agent used is 0.005 to 0.05 kg / ton (ore) when using conventional collectors with any other blowing agent. So 500 grams of chalcopyrite