有机相循环对萃铜性能和萃余液夹带的影响.pdf

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1、Vo1．34No1第34卷第1期矿冶工程2014年O2月MININGANDMETALLURGICALENGINEERINGFebruary2014有机相循环对萃铜性能和萃余液夹带的影响①刘妍君，刘晓荣，李慧，李永胜，苏畅(1．上海应用技术学院材料科学与工程学院，上海201418；2．东华大学环境工程与科学学院，上海200051)摘要：研究了有机相循环对铜萃取性能和萃余液夹带行为的影响。结果表明，当有机相循环次数从1次增加到10次，萃取分相速率从0．45mm／s近乎线性地升高到0．61mlll／S，铜萃取率从99．8％线性微降至99．2％。前3次循环中

2、，萃余液表面张力从52·9raN／m降低至41．3mN／m，萃余液中有机相夹带比例由60％升高到80％，溶解比例相应由40％降低到20％，之后的循环中萃余液表面张力从41．3mN／m升高到67．9mN／m，夹带比例降低，溶解比例升高，最终比例接近1：1。萃余液有机相含量在第3次循环时达到最高，COD值为604mg／L。萃余液夹带是有机相流失规律的主导因素，对其控制是减少有机相流失的关键。关键词：铜萃取；有机相循环；分相；萃取率；萃余液；夹带中图分类号：TF111文献标识码：Adoi：10．3969／j．issn．0253—6099．2014．01．0

3、17文童编号：0253-6099(2014)01—0061—04EfectofRecyclingOrganicPhaseonCopperExtractionRateandEntrainmentofAqueousRaffinateLIUYan-jun，LIUXiao．rong，LIHui，LIYong．sheng，SUChang(1．SchoolofMaterialsScienceandEngineering，ShanghaiInstituteofTechnology，Shanghai201418，China；2．CollegeofEnvironmen

4、talScienceandEngineering，DonghuaUniversity，Shanghai200051，China)Abstract：Effectofrecyclinguseoforganicphaseoncopperextractionrateandentrainmentofaqueousraffinatewasstudied．Resultsshowedthatasrecyclingtimesoforganicphaseincreasedfrom1to10，thephaseseparationspeedlinearlyincreased

5、from0．45mm／sto0．61mm／s．whilecopperextractionrateslightlydecreasedfrom99．8％to99．2％．Inthefirstthreetimesofrecyclinguse，thesurfacetensionofraffinatewasreducedfrom52．9mN／mto41．3mN／m．Theproportionofentrainedorganicchemicalstothetotalorganicchemicalslostintheraffinateincreasedfrom60％

6、to80％．Correspondinglytheproportionofdissolvedorganicchemicalswasreducedfrom40％to20％．However，afterfurtherrecyclinguseoforganicphase，thesurfacetensionofraffinateincreasedfrom41．3mN／mto67．9mN／m，witl1anincreaseinbothproportionofentrainmentandthedissolved，finallyaround1：1．Thehighest

7、CODvalueofaqueousrafinatereached604mg／Lonthethirdrecyclingtime．Theentrainmentoforganicphase，whichcontributestothemostoforganicphaseloseintheraffinate，iscriticaltobecontrolledforreducingorganicphaselose．Keywords：coppersolventextraction；extraction—strippingloop；phasedisengagement

8、；extractionrate；raffinate；entrainment人们越来越关注资源的合理利用及生产