钛铁矿在捕收剂1,10-菲罗啉作用下的浮选行为

Flotation behavior of ilmenite using 1,10-phenanthroline as novel collector

引入1,10-菲罗啉(Phen)作为钛铁矿与钛辉石选择性分离的新型捕收剂。浮选实验表明,与苯甲羟肟酸(BHA)相比,在pH 2~12之间,Phen是钛铁矿浮选更加有效的捕收剂,并且在pH 6时钛铁矿的回收率提高最大(约为20%)。在浮选过程中,钛辉石的可浮性保持在非常低的水平(回收率<5%)。FTIR和XPS分析表明,Phen和BHA以化学吸附的方式吸附在钛铁矿表面,并且钛铁矿与Phen之间的相互作用比BHA更强。XPS结果还表明,Phen在钛铁矿表面与铁(亚铁和铁)和钛发生反应,在Phen吸附到钛铁矿表面的过程中形成五元环结构。

1,10-phenanthroline(Phen)was introduced as the novel collector for the selective separation of ilmenite from titanaugite.Micro-flotation showed that Phen was a more effective collector for ilmenite flotation from pH 2 to 12 compared with benzohydroxamic acid(BHA),and the maximum increase in ilmenite recovery(~20%)was observed at pH 6.Titanaugite kept at very low level of floatability(recovery<5%)during micro-flotation test.FTIR and XPS analyses indicated that Phen and BHA adsorbed onto ilmenite surface via chemisorption and the interaction between Phen and ilmenite was intenser than that of BHA.XPS results also showed that Phen reacted with both iron(ferrous and ferric)and titanium on the ilmenite surface.A five membered ring structure appeared to form during the adsorption of Phen onto the ilmenite surface.