长石石英浮选分离试验及混合捕收剂作用机理研究  

Study on the Flotation Separation of Feldspar and Quartz and the Mechanism of Combined Collectors

作　　者：于福顺 邵怀志 蒋曼[1] 张彩娥 王建磊 李军 YU Fushun;SHAO Huaizhi;JIANG Man;ZHANG Caie;WANG Jianlei;LI Jun(School of Environment and Resources Engineering,Shandong University of Technology,Zibo,Shandong 255000,China;Shandong Huate Magnetoelectricity Science and Technology Ltd,Linqu,Shandong 262600,China)

机构地区：[1]山东理工大学资源与环境工程学院,山东淄博市255000 [2]山东华特磁电科技股份有限公司,山东临朐县262600

出　　处：《矿业研究与开发》2020年第12期122-127,共6页Mining Research and Development

基　　金：国家自然科学基金资助项目(51804188);山东省自然科学基金项目(ZR2016EEM19)。

摘　　要：针对长石和石英的无氟浮选分离难题,采用油酸与十二胺组成的混合捕收剂在pH=2的条件下时可实现长石和石英的有效分离。机理研究表明,当pH=2时,长石表面呈电负性,可通过静电作用与十二胺阳离子发生强烈的吸附作用,而石英表面荷正电,不与十二胺发生静电吸附。油酸分子与十二胺离子在该pH条件下形成了分子-离子缔合物,降低了十二胺离子的表面张力、HLB值和CMC值,从而提高了十二胺离子的疏水性和捕收能力。红外光谱数据表明,油酸与十二胺组成的混合捕收剂对长石的吸附能力强于单一捕收剂,而对石英的吸附作用较弱。Aiming at the problem of fluoride free flotation separation of feldspar and quartz,the mixed collector composed of oleic acid and dodecylamine can effectively separate feldspar and quartz at pH=2.The mechanism study shows that when pH=2,the feldspar surface is electronegative,which can strongly adsorb dodecylamine cation through electrostatic interaction,while quartz surface is positively charged and does not adsorb with dodecylamine.Oleic acid molecules and dodecylamine ions form a molecular ion association complex at this pH,which reduces the surface tension,HLB value and CMC value of dodecylamine ion,thus improving the hydrophobicity and collecting ability of dodecylamine ion.The infrared spectrum data showed that the adsorption capacity of mixed collector composed of oleic acid and dodecylamine was stronger than that of single collector,but the adsorption effect on quartz was weak.

关 键 词：长石石英 无氟浮选 混合捕收剂 浮选分离 

分 类 号：TD985[矿业工程—选矿]