Flotation performance and adsorption mechanism of novel 1-(2-hydroxyphenyl)hex-2-en-1-one oxime flotation collector to malachite  

新型1−(2−羟苯基)己−2−烯−1−酮肟浮选捕收剂对孔雀石的浮选性能及吸附机理

作　　者：Fang-xu LI Xiao-tong ZHOU Ri-xiao LIN 李方旭;周晓彤;林日孝(广东省科学院,广州510650;广东省资源综合利用研究所,广州510650;稀有金属分离与综合利用国家重点实验室,广州510650;广东省矿产资源开发和综合利用重点实验室,广州510650)

机构地区：[1]Guangdong Academy of Sciences,Guangzhou 510650,China [2]Guangdong Institute of Resources Comprehensive Utilization,Guangzhou 510650,China [3]State Key Laboratory of Rare Metals Separation and Comprehensive Utilization,Guangzhou 510650,China [4]Guangdong Provincial Key Laboratory of Development and Comprehensive Utilization of Mineral Resources,Guangzhou 510650,China

出　　处：《Transactions of Nonferrous Metals Society of China》2020年第10期2792-2801,共10页中国有色金属学报（英文版）

基　　金：Projects(2018GDASCX-0934,2020GDASYL-20200302009)supported by Guangdong Academy of Sciences,China。

摘　　要：A novel collector 1-(2-hydroxyphenyl)hex-2-en-1-one oxime(HPHO)was synthesized from 2-hydroxy acetophenone and butyraldehyde.Its flotation performance and adsorption mechanism to malachite were investigated by flotation test,zeta potential,Fourier transform infrared(FTIR)and X-ray photoelectron spectroscopy(XPS)analysis techniques.Compared with benzohydroxamic acid(BA),1-(2-hydroxyphenyl)ethan-1-one oxime(HPEO)and sodium isobutyl xanthate(SIBX),HPHO exhibited excellent collecting power to malachite without additional reagents,such as Na2S regulator and methyl isobutyl carbinol(MIBC)frother.Results of zeta potential indicated that HPHO was coated on malachite surfaces through a chemisorption process.FTIR and XPS data gave clear evidence for the formation of Cu−oxime complex on malachite surfaces after HPHO adsorption through the linkage between C=C,—OH,N—OH group and Cu species.以2−羟基苯乙酮和丁醛为原料合成一种新型1−(2−羟苯基)己−2−烯−1−酮肟(HPHO)捕收剂。通过浮选试验、zeta电位、傅里叶变换红外光谱(FTIR)和X射线光电子能谱(XPS)分析技术研究HPHO对孔雀石的浮选性能和吸附机理。结果表明,与苯甲羟肟酸(BA)、1−(2−羟苯基)乙−1−酮肟(HPEO)和异丁基黄药(SIBX)相比,HPHO对孔雀石具有更好的捕收性能且无需额外添加调整剂Na2S和起泡剂甲基异丁基甲醇(MIBC)。Zeta电位结果发现,HPHO可能通过化学作用吸附在孔雀石表面。FTIR和XPS结果表明,HPHO通过C=C、—OH和N—OH基团与孔雀石表面的铜物种键合形成Cu−肟配合物。

关 键 词：MALACHITE FLOTATION COLLECTOR OXIME adsorption mechanism 

分 类 号：TD923.13[矿业工程—选矿] TD97