Investigating the use of an ionic liquid for rare earth mineral flotation

查看全文 作　　者：[1]R.Li;[1]C.Marion;[1]E.R.L.Espirtu;[2]R.Multani;Xiaoqi [3]Sun;[1]K.E.Waters

机构地区：[1]Department of Mining and Materials Engineering,McGill University,3610 Rue University.Montreal,Quebec,H3A 0C5,Canada;[2]Vale,Ontario Operations(Base Metals),18 Rink St.,Copper Cliff,Ontario POM 1N0,Canada;[3]Fujian Institute of Research on the Structure of Matter,Chinese Academy of Sciences,155 Yangqiao Road West,Fuzhou 350002,China

出　　处：《Journal of Rare Earths》索引2021年第39卷第7期,共10页

基　　金：Project supported by the Natural Sciences and Engineering Research Council of Canada(NSERC);Avalon Advanced Materials Inc.through the Collaborative Research and Development(CRD)Program(CRDPJ 44537-12)。 摘　　要：Common collectors for rare earth mineral(REM) flotation,which include carboxylates and hydroxamates,face problems such as being non-selective and sensitive to impurity ions.A type of ionic liquid(IL),tetraethylammonium mono-(2-ethylhexyl)2-ethylhexyl phosphonate([N_(2222)][EHEHP]),has been investigated previously for rare earth elements(REE) solvent extraction,and was proven to be selective and effective.In this work,[N_(2222)][EHEHP] was evaluated as a collector in bastnasite(a primary REM source for REE production) flotation for the first time.The results were compared with quartz and hematite,two common gangue minerals in REM deposits.Zeta potential measurements and Fouriertransform infrared spectroscopy(FT-IR) were completed to investigate the surface chemical properties involved in the flotation of these minerals using this collector.The findings were compared with microflotation results.FT-IR and zeta potential measurements suggest adsorption of the collector’s phosphonate group onto bastnäsite and hematite,likely through chemisorption;whereas for quartz,the minimum micro flotation recovery is likely due to no adsorption of IL on its surface.Micro flotation re sults show higher collectability of [N_(2222)] [EHEHP] for hematite than bastnasite,the latter only shows appreciable recovery at pH 5 with elevated dosage of IL(500 g/t).To achieve better separation,a two-stage flotation scheme was designed and evaluated by bench scale flotation on a synthetic mineral mixture.The concentrates and tails were analyzed by magnetic separation,and it is found that bastnasite recovery over 90% with maximum upgrade ratio 1.7 can be achieved with elevated collector dosage. 关键词：Ionic liquid Rare earth Bastnasite FLOTATION FT-IR Zeta potential

相关文献

参考文献（57）
引证文献（7）
耦合文献（48）

参考文献(57)

引证文献(7)

耦合文献(48)

互联网出版许可证新出网证(渝)字10号全国400电话 - 免长途话费

Investigating the use of an ionic liquid for rare earth mineral flotation

参考文献(57)

引证文献(7)

耦合文献(48)

用户提示