磁化时间对丁铵黑药强化方铅矿可浮性的影响机理  

Mechanism of Influence of Magnetization Time on Galena Floatability Enhanced by Ammonium Dibutyl Dithiophosphate

作　　者：孙朋 陈维虹 华开强 雷大士 王宇斌[2] SUN Peng;CHEN Weihong;HUA Kaiqiang;LEI Dashi;WANG Yubin(Jiuquan Iron and Steel(Group)Co.,Ltd.;School of Resource Engineering,Xi′an University of Architecture and Technology)

机构地区：[1]酒泉钢铁(集团)有限责任公司,甘肃省嘉峪关市735100 [2]西安建筑科技大学资源工程学院,陕西省西安市710055

出　　处：《现代矿业》2024年第6期129-133,共5页Modern Mining

基　　金：国家自然科学基金青年基金项目(编号:52304192);中国博士后科学基金项目(编号:2022MD723813)。

摘　　要：为阐明磁化时间对交变磁场磁化预处理捕收剂丁铵黑药改善方铅矿浮选效果的影响机制,采用表面张力、红外光谱以及接触角等手段,分别对不同磁化时间下磁化丁铵黑药作用后的方铅矿样品进行表征。结果表明,交变磁场磁化丁铵黑药可显著改善方铅矿的可浮性,与未磁化丁铵黑药相比,当磁化时间为10 min,电流频率为1.5 MHz,线圈匝数为100 N时,可使方铅矿回收率提高13.04个百分点。上述磁化预处理条件可使丁铵黑药溶液的表面张力降低10.95 mN/m,丁铵黑药中N—H键的相对比例增大2.36%,从而增强了丁铵黑药的起泡能力。此外磁化丁铵黑药作用的方铅矿样品的接触角增大了13.89°,表明磁化预处理可强化丁铵黑药与方铅矿的作用程度,并改善方铅矿的浮选效果。Surface tension,infrared spectrum and contact angle are used to characterize the galena samples to clarify the enhancing mechanism of magnetization time on the galena flotation,with collectoram⁃monium dibutyl dithiophosphatepre-magnetized by alternating magnetic field.The flotation results show that the floatability of galena could be significantly improved by magnetizing ammonium dibutyl dithiophosphate with alternating magnetic field.Compared with unmagnetized ammonium dibutyl dithiophosphate,the recov⁃ery rate of galena increases 13.04 percentage points when the magnetization time is 10 min,current frequen⁃cy is 1.5 MHz and the number of turns is 100 N.After pre-magnetized treatment,the surface tension of am⁃monium dibutyl dithiophosphate is reduced by 10.95 mN/m,and the relative ratio of N-H bond in ammoni⁃um dibutyl dithiophosphate is increased by 2.36%,which enhances the foaming ability of ammonium dibu⁃tyl dithiophosphate.In addition,the contact angle of the galena samples increases 13.89°,indicating that the magnetization pretreatment can strengthen the interaction degree of ammonium dibutyl dithiophosphate with galena,thus improving the flotation efficiency of galena.

关 键 词：方铅矿 丁铵黑药 磁化时间 可浮性 

分 类 号：TD952[矿业工程—选矿] TD923