Selective flotation separation of andalusite and quartz and its mechanism  

作　　者：Yan-ping Niu Chuan-yao Sun Wan-zhong Yin Xing-rong Zhang Hong-feng Xu Xu Zhang 

机构地区：[1]College of Resources and Civil Engineering,Northeastern University,Shenyang 110000,China [2]State Key Laboratory of Mineral Processing,BGRIMM Technology Group,Beijing 100160,China [3]The Research Center of Experimental Testing for Geology and Minerals in Heilongjiang Province,Harbin 150000,China [4]Heilongjiang Mining Group Co. Ltd.,Harbin 150000,China

出　　处：《International Journal of Minerals,Metallurgy and Materials》2019年第9期1059-1068,共10页矿物冶金与材料学报（英文版）

基　　金：financially supported by the State Key Laboratory of Mineral Processing of BGRIMM Technology Group, China (No.BGRIMM-KJSKL-2017-11)

摘　　要：The separation of andalusite and quartz was investigated in the sodium oleate flotation system, and its mechanism was studied by solution chemical calculation, zeta-potential tests, Fourier transform infrared spectroscopic(FTIR), and X-ray photoelectron spectroscopic(XPS). The flotation tests results show that FeCl3·6H2O has a strong activation effect on andalusite and quartz and citric acid has a strong inhibitory effect on activated quartz, thus increasing the floatability difference between quartz and andalusite when the pulp p H is approximately 8. The FTIR, Zeta potential, and XPS analyses combined with the chemical calculation of flotation reagent solutions demonstrate that Fe forms hydroxide precipitates on the surface of andalusite and quartz and that oleate anions and metal ions adsorb onto the surface of the minerals. The elements Al and Fe can be chemically reacted. The anions in citric acid have different degrees of dissolution of Fe on the andalusite and quartz surfaces, thereby selectively eliminating the activation of the elemental Fe on andalusite and quartz and increasing the floatability of andalusite, leading to a better separation effect between andalusite and quartz.The separation of andalusite and quartz was investigated in the sodium oleate flotation system, and its mechanism was studied by solution chemical calculation, zeta-potential tests, Fourier transform infrared spectroscopic（FTIR）, and X-ray photoelectron spectroscopic（XPS）. The flotation tests results show that FeCl3·6H2O has a strong activation effect on andalusite and quartz and citric acid has a strong inhibitory effect on activated quartz, thus increasing the floatability difference between quartz and andalusite when the pulp p H is approximately 8. The FTIR, Zeta potential, and XPS analyses combined with the chemical calculation of flotation reagent solutions demonstrate that Fe forms hydroxide precipitates on the surface of andalusite and quartz and that oleate anions and metal ions adsorb onto the surface of the minerals. The elements Al and Fe can be chemically reacted. The anions in citric acid have different degrees of dissolution of Fe on the andalusite and quartz surfaces, thereby selectively eliminating the activation of the elemental Fe on andalusite and quartz and increasing the floatability of andalusite, leading to a better separation effect between andalusite and quartz.

关 键 词：ANDALUSITE QUARTZ flotation MECHANISM zeta potential Fourier infrared SPECTRUM ANALYSIS X-ray PHOTOELECTRON energy SPECTRUM ANALYSIS 

分 类 号：TF[冶金工程]